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gstreamer/gst/rtsp/gstrtspsrc.c
Sebastian Dröge 9865730cfa rtspsrc: Fix up last commit
2015-05-04 16:50:38 +02:00

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/* GStreamer
* Copyright (C) <2005,2006> Wim Taymans <wim at fluendo dot com>
* <2006> Lutz Mueller <lutz at topfrose dot de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/*
* Unless otherwise indicated, Source Code is licensed under MIT license.
* See further explanation attached in License Statement (distributed in the file
* LICENSE).
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is furnished to do
* so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/**
* SECTION:element-rtspsrc
*
* Makes a connection to an RTSP server and read the data.
* rtspsrc strictly follows RFC 2326 and therefore does not (yet) support
* RealMedia/Quicktime/Microsoft extensions.
*
* RTSP supports transport over TCP or UDP in unicast or multicast mode. By
* default rtspsrc will negotiate a connection in the following order:
* UDP unicast/UDP multicast/TCP. The order cannot be changed but the allowed
* protocols can be controlled with the #GstRTSPSrc:protocols property.
*
* rtspsrc currently understands SDP as the format of the session description.
* For each stream listed in the SDP a new rtp_stream\%d pad will be created
* with caps derived from the SDP media description. This is a caps of mime type
* "application/x-rtp" that can be connected to any available RTP depayloader
* element.
*
* rtspsrc will internally instantiate an RTP session manager element
* that will handle the RTCP messages to and from the server, jitter removal,
* packet reordering along with providing a clock for the pipeline.
* This feature is implemented using the gstrtpbin element.
*
* rtspsrc acts like a live source and will therefore only generate data in the
* PLAYING state.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch-1.0 rtspsrc location=rtsp://some.server/url ! fakesink
* ]| Establish a connection to an RTSP server and send the raw RTP packets to a
* fakesink.
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdarg.h>
#include <gst/net/gstnet.h>
#include <gst/sdp/gstsdpmessage.h>
#include <gst/sdp/gstmikey.h>
#include <gst/rtp/gstrtppayloads.h>
#include "gst/gst-i18n-plugin.h"
#include "gstrtspsrc.h"
GST_DEBUG_CATEGORY_STATIC (rtspsrc_debug);
#define GST_CAT_DEFAULT (rtspsrc_debug)
static GstStaticPadTemplate rtptemplate = GST_STATIC_PAD_TEMPLATE ("stream_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("application/x-rtp; application/x-rdt"));
/* templates used internally */
static GstStaticPadTemplate anysrctemplate =
GST_STATIC_PAD_TEMPLATE ("internalsrc_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate anysinktemplate =
GST_STATIC_PAD_TEMPLATE ("internalsink_%u",
GST_PAD_SINK,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS_ANY);
enum
{
SIGNAL_HANDLE_REQUEST,
SIGNAL_ON_SDP,
SIGNAL_SELECT_STREAM,
SIGNAL_NEW_MANAGER,
SIGNAL_REQUEST_RTCP_KEY,
LAST_SIGNAL
};
enum _GstRtspSrcRtcpSyncMode
{
RTCP_SYNC_ALWAYS,
RTCP_SYNC_INITIAL,
RTCP_SYNC_RTP
};
enum _GstRtspSrcBufferMode
{
BUFFER_MODE_NONE,
BUFFER_MODE_SLAVE,
BUFFER_MODE_BUFFER,
BUFFER_MODE_AUTO,
BUFFER_MODE_SYNCED
};
#define GST_TYPE_RTSP_SRC_BUFFER_MODE (gst_rtsp_src_buffer_mode_get_type())
static GType
gst_rtsp_src_buffer_mode_get_type (void)
{
static GType buffer_mode_type = 0;
static const GEnumValue buffer_modes[] = {
{BUFFER_MODE_NONE, "Only use RTP timestamps", "none"},
{BUFFER_MODE_SLAVE, "Slave receiver to sender clock", "slave"},
{BUFFER_MODE_BUFFER, "Do low/high watermark buffering", "buffer"},
{BUFFER_MODE_AUTO, "Choose mode depending on stream live", "auto"},
{BUFFER_MODE_SYNCED, "Synchronized sender and receiver clocks", "synced"},
{0, NULL, NULL},
};
if (!buffer_mode_type) {
buffer_mode_type =
g_enum_register_static ("GstRTSPSrcBufferMode", buffer_modes);
}
return buffer_mode_type;
}
#define AES_128_KEY_LEN 16
#define AES_256_KEY_LEN 32
#define HMAC_32_KEY_LEN 4
#define HMAC_80_KEY_LEN 10
#define DEFAULT_LOCATION NULL
#define DEFAULT_PROTOCOLS GST_RTSP_LOWER_TRANS_UDP | GST_RTSP_LOWER_TRANS_UDP_MCAST | GST_RTSP_LOWER_TRANS_TCP
#define DEFAULT_DEBUG FALSE
#define DEFAULT_RETRY 20
#define DEFAULT_TIMEOUT 5000000
#define DEFAULT_UDP_BUFFER_SIZE 0x80000
#define DEFAULT_TCP_TIMEOUT 20000000
#define DEFAULT_LATENCY_MS 2000
#define DEFAULT_DROP_ON_LATENCY FALSE
#define DEFAULT_CONNECTION_SPEED 0
#define DEFAULT_NAT_METHOD GST_RTSP_NAT_DUMMY
#define DEFAULT_DO_RTCP TRUE
#define DEFAULT_DO_RTSP_KEEP_ALIVE TRUE
#define DEFAULT_PROXY NULL
#define DEFAULT_RTP_BLOCKSIZE 0
#define DEFAULT_USER_ID NULL
#define DEFAULT_USER_PW NULL
#define DEFAULT_BUFFER_MODE BUFFER_MODE_AUTO
#define DEFAULT_PORT_RANGE NULL
#define DEFAULT_SHORT_HEADER FALSE
#define DEFAULT_PROBATION 2
#define DEFAULT_UDP_RECONNECT TRUE
#define DEFAULT_MULTICAST_IFACE NULL
#define DEFAULT_NTP_SYNC FALSE
#define DEFAULT_USE_PIPELINE_CLOCK FALSE
#define DEFAULT_TLS_VALIDATION_FLAGS G_TLS_CERTIFICATE_VALIDATE_ALL
#define DEFAULT_TLS_DATABASE NULL
#define DEFAULT_DO_RETRANSMISSION TRUE
enum
{
PROP_0,
PROP_LOCATION,
PROP_PROTOCOLS,
PROP_DEBUG,
PROP_RETRY,
PROP_TIMEOUT,
PROP_TCP_TIMEOUT,
PROP_LATENCY,
PROP_DROP_ON_LATENCY,
PROP_CONNECTION_SPEED,
PROP_NAT_METHOD,
PROP_DO_RTCP,
PROP_DO_RTSP_KEEP_ALIVE,
PROP_PROXY,
PROP_PROXY_ID,
PROP_PROXY_PW,
PROP_RTP_BLOCKSIZE,
PROP_USER_ID,
PROP_USER_PW,
PROP_BUFFER_MODE,
PROP_PORT_RANGE,
PROP_UDP_BUFFER_SIZE,
PROP_SHORT_HEADER,
PROP_PROBATION,
PROP_UDP_RECONNECT,
PROP_MULTICAST_IFACE,
PROP_NTP_SYNC,
PROP_USE_PIPELINE_CLOCK,
PROP_SDES,
PROP_TLS_VALIDATION_FLAGS,
PROP_TLS_DATABASE,
PROP_DO_RETRANSMISSION
};
#define GST_TYPE_RTSP_NAT_METHOD (gst_rtsp_nat_method_get_type())
static GType
gst_rtsp_nat_method_get_type (void)
{
static GType rtsp_nat_method_type = 0;
static const GEnumValue rtsp_nat_method[] = {
{GST_RTSP_NAT_NONE, "None", "none"},
{GST_RTSP_NAT_DUMMY, "Send Dummy packets", "dummy"},
{0, NULL, NULL},
};
if (!rtsp_nat_method_type) {
rtsp_nat_method_type =
g_enum_register_static ("GstRTSPNatMethod", rtsp_nat_method);
}
return rtsp_nat_method_type;
}
static void gst_rtspsrc_finalize (GObject * object);
static void gst_rtspsrc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rtspsrc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstClock *gst_rtspsrc_provide_clock (GstElement * element);
static void gst_rtspsrc_uri_handler_init (gpointer g_iface,
gpointer iface_data);
static void gst_rtspsrc_sdp_attributes_to_caps (GArray * attributes,
GstCaps * caps);
static gboolean gst_rtspsrc_set_proxy (GstRTSPSrc * rtsp, const gchar * proxy);
static void gst_rtspsrc_set_tcp_timeout (GstRTSPSrc * rtspsrc, guint64 timeout);
static GstCaps *gst_rtspsrc_media_to_caps (gint pt, const GstSDPMedia * media);
static GstStateChangeReturn gst_rtspsrc_change_state (GstElement * element,
GstStateChange transition);
static gboolean gst_rtspsrc_send_event (GstElement * element, GstEvent * event);
static void gst_rtspsrc_handle_message (GstBin * bin, GstMessage * message);
static gboolean gst_rtspsrc_setup_auth (GstRTSPSrc * src,
GstRTSPMessage * response);
static gboolean gst_rtspsrc_loop_send_cmd (GstRTSPSrc * src, gint cmd,
gint mask);
static GstRTSPResult gst_rtspsrc_send_cb (GstRTSPExtension * ext,
GstRTSPMessage * request, GstRTSPMessage * response, GstRTSPSrc * src);
static GstRTSPResult gst_rtspsrc_open (GstRTSPSrc * src, gboolean async);
static GstRTSPResult gst_rtspsrc_play (GstRTSPSrc * src, GstSegment * segment,
gboolean async);
static GstRTSPResult gst_rtspsrc_pause (GstRTSPSrc * src, gboolean async);
static GstRTSPResult gst_rtspsrc_close (GstRTSPSrc * src, gboolean async,
gboolean only_close);
static gboolean gst_rtspsrc_uri_set_uri (GstURIHandler * handler,
const gchar * uri, GError ** error);
static gchar *gst_rtspsrc_uri_get_uri (GstURIHandler * handler);
static gboolean gst_rtspsrc_activate_streams (GstRTSPSrc * src);
static gboolean gst_rtspsrc_loop (GstRTSPSrc * src);
static gboolean gst_rtspsrc_stream_push_event (GstRTSPSrc * src,
GstRTSPStream * stream, GstEvent * event);
static gboolean gst_rtspsrc_push_event (GstRTSPSrc * src, GstEvent * event);
static void gst_rtspsrc_connection_flush (GstRTSPSrc * src, gboolean flush);
typedef struct
{
guint8 pt;
GstCaps *caps;
} PtMapItem;
/* commands we send to out loop to notify it of events */
#define CMD_OPEN (1 << 0)
#define CMD_PLAY (1 << 1)
#define CMD_PAUSE (1 << 2)
#define CMD_CLOSE (1 << 3)
#define CMD_WAIT (1 << 4)
#define CMD_RECONNECT (1 << 5)
#define CMD_LOOP (1 << 6)
/* mask for all commands */
#define CMD_ALL ((CMD_LOOP << 1) - 1)
#define GST_ELEMENT_PROGRESS(el, type, code, text) \
G_STMT_START { \
gchar *__txt = _gst_element_error_printf text; \
gst_element_post_message (GST_ELEMENT_CAST (el), \
gst_message_new_progress (GST_OBJECT_CAST (el), \
GST_PROGRESS_TYPE_ ##type, code, __txt)); \
g_free (__txt); \
} G_STMT_END
static guint gst_rtspsrc_signals[LAST_SIGNAL] = { 0 };
#define gst_rtspsrc_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstRTSPSrc, gst_rtspsrc, GST_TYPE_BIN,
G_IMPLEMENT_INTERFACE (GST_TYPE_URI_HANDLER, gst_rtspsrc_uri_handler_init));
#ifndef GST_DISABLE_GST_DEBUG
static inline const char *
cmd_to_string (guint cmd)
{
switch (cmd) {
case CMD_OPEN:
return "OPEN";
case CMD_PLAY:
return "PLAY";
case CMD_PAUSE:
return "PAUSE";
case CMD_CLOSE:
return "CLOSE";
case CMD_WAIT:
return "WAIT";
case CMD_RECONNECT:
return "RECONNECT";
case CMD_LOOP:
return "LOOP";
}
return "unknown";
}
#endif
static gboolean
default_select_stream (GstRTSPSrc * src, guint id, GstCaps * caps)
{
GST_DEBUG_OBJECT (src, "default handler");
return TRUE;
}
static gboolean
select_stream_accum (GSignalInvocationHint * ihint,
GValue * return_accu, const GValue * handler_return, gpointer data)
{
gboolean myboolean;
myboolean = g_value_get_boolean (handler_return);
GST_DEBUG ("accum %d", myboolean);
g_value_set_boolean (return_accu, myboolean);
/* stop emission if FALSE */
return myboolean;
}
static void
gst_rtspsrc_class_init (GstRTSPSrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBinClass *gstbin_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbin_class = (GstBinClass *) klass;
GST_DEBUG_CATEGORY_INIT (rtspsrc_debug, "rtspsrc", 0, "RTSP src");
gobject_class->set_property = gst_rtspsrc_set_property;
gobject_class->get_property = gst_rtspsrc_get_property;
gobject_class->finalize = gst_rtspsrc_finalize;
g_object_class_install_property (gobject_class, PROP_LOCATION,
g_param_spec_string ("location", "RTSP Location",
"Location of the RTSP url to read",
DEFAULT_LOCATION, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PROTOCOLS,
g_param_spec_flags ("protocols", "Protocols",
"Allowed lower transport protocols", GST_TYPE_RTSP_LOWER_TRANS,
DEFAULT_PROTOCOLS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DEBUG,
g_param_spec_boolean ("debug", "Debug",
"Dump request and response messages to stdout",
DEFAULT_DEBUG, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_RETRY,
g_param_spec_uint ("retry", "Retry",
"Max number of retries when allocating RTP ports.",
0, G_MAXUINT16, DEFAULT_RETRY,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TIMEOUT,
g_param_spec_uint64 ("timeout", "Timeout",
"Retry TCP transport after UDP timeout microseconds (0 = disabled)",
0, G_MAXUINT64, DEFAULT_TIMEOUT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_TCP_TIMEOUT,
g_param_spec_uint64 ("tcp-timeout", "TCP Timeout",
"Fail after timeout microseconds on TCP connections (0 = disabled)",
0, G_MAXUINT64, DEFAULT_TCP_TIMEOUT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_LATENCY,
g_param_spec_uint ("latency", "Buffer latency in ms",
"Amount of ms to buffer", 0, G_MAXUINT, DEFAULT_LATENCY_MS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DROP_ON_LATENCY,
g_param_spec_boolean ("drop-on-latency",
"Drop buffers when maximum latency is reached",
"Tells the jitterbuffer to never exceed the given latency in size",
DEFAULT_DROP_ON_LATENCY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CONNECTION_SPEED,
g_param_spec_uint64 ("connection-speed", "Connection Speed",
"Network connection speed in kbps (0 = unknown)",
0, G_MAXUINT64 / 1000, DEFAULT_CONNECTION_SPEED,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_NAT_METHOD,
g_param_spec_enum ("nat-method", "NAT Method",
"Method to use for traversing firewalls and NAT",
GST_TYPE_RTSP_NAT_METHOD, DEFAULT_NAT_METHOD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc:do-rtcp:
*
* Enable RTCP support. Some old server don't like RTCP and then this property
* needs to be set to FALSE.
*/
g_object_class_install_property (gobject_class, PROP_DO_RTCP,
g_param_spec_boolean ("do-rtcp", "Do RTCP",
"Send RTCP packets, disable for old incompatible server.",
DEFAULT_DO_RTCP, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc:do-rtsp-keep-alive:
*
* Enable RTSP keep alive support. Some old server don't like RTSP
* keep alive and then this property needs to be set to FALSE.
*/
g_object_class_install_property (gobject_class, PROP_DO_RTSP_KEEP_ALIVE,
g_param_spec_boolean ("do-rtsp-keep-alive", "Do RTSP Keep Alive",
"Send RTSP keep alive packets, disable for old incompatible server.",
DEFAULT_DO_RTSP_KEEP_ALIVE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc:proxy:
*
* Set the proxy parameters. This has to be a string of the format
* [http://][user:passwd@]host[:port].
*/
g_object_class_install_property (gobject_class, PROP_PROXY,
g_param_spec_string ("proxy", "Proxy",
"Proxy settings for HTTP tunneling. Format: [http://][user:passwd@]host[:port]",
DEFAULT_PROXY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc:proxy-id:
*
* Sets the proxy URI user id for authentication. If the URI set via the
* "proxy" property contains a user-id already, that will take precedence.
*
* Since: 1.2
*/
g_object_class_install_property (gobject_class, PROP_PROXY_ID,
g_param_spec_string ("proxy-id", "proxy-id",
"HTTP proxy URI user id for authentication", "",
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc:proxy-pw:
*
* Sets the proxy URI password for authentication. If the URI set via the
* "proxy" property contains a password already, that will take precedence.
*
* Since: 1.2
*/
g_object_class_install_property (gobject_class, PROP_PROXY_PW,
g_param_spec_string ("proxy-pw", "proxy-pw",
"HTTP proxy URI user password for authentication", "",
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc:rtp-blocksize:
*
* RTP package size to suggest to server.
*/
g_object_class_install_property (gobject_class, PROP_RTP_BLOCKSIZE,
g_param_spec_uint ("rtp-blocksize", "RTP Blocksize",
"RTP package size to suggest to server (0 = disabled)",
0, 65536, DEFAULT_RTP_BLOCKSIZE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class,
PROP_USER_ID,
g_param_spec_string ("user-id", "user-id",
"RTSP location URI user id for authentication", DEFAULT_USER_ID,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_USER_PW,
g_param_spec_string ("user-pw", "user-pw",
"RTSP location URI user password for authentication", DEFAULT_USER_PW,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc:buffer-mode:
*
* Control the buffering and timestamping mode used by the jitterbuffer.
*/
g_object_class_install_property (gobject_class, PROP_BUFFER_MODE,
g_param_spec_enum ("buffer-mode", "Buffer Mode",
"Control the buffering algorithm in use",
GST_TYPE_RTSP_SRC_BUFFER_MODE, DEFAULT_BUFFER_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc:port-range:
*
* Configure the client port numbers that can be used to recieve RTP and
* RTCP.
*/
g_object_class_install_property (gobject_class, PROP_PORT_RANGE,
g_param_spec_string ("port-range", "Port range",
"Client port range that can be used to receive RTP and RTCP data, "
"eg. 3000-3005 (NULL = no restrictions)", DEFAULT_PORT_RANGE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc:udp-buffer-size:
*
* Size of the kernel UDP receive buffer in bytes.
*/
g_object_class_install_property (gobject_class, PROP_UDP_BUFFER_SIZE,
g_param_spec_int ("udp-buffer-size", "UDP Buffer Size",
"Size of the kernel UDP receive buffer in bytes, 0=default",
0, G_MAXINT, DEFAULT_UDP_BUFFER_SIZE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc:short-header:
*
* Only send the basic RTSP headers for broken encoders.
*/
g_object_class_install_property (gobject_class, PROP_SHORT_HEADER,
g_param_spec_boolean ("short-header", "Short Header",
"Only send the basic RTSP headers for broken encoders",
DEFAULT_SHORT_HEADER, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PROBATION,
g_param_spec_uint ("probation", "Number of probations",
"Consecutive packet sequence numbers to accept the source",
0, G_MAXUINT, DEFAULT_PROBATION,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_UDP_RECONNECT,
g_param_spec_boolean ("udp-reconnect", "Reconnect to the server",
"Reconnect to the server if RTSP connection is closed when doing UDP",
DEFAULT_UDP_RECONNECT, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MULTICAST_IFACE,
g_param_spec_string ("multicast-iface", "Multicast Interface",
"The network interface on which to join the multicast group",
DEFAULT_MULTICAST_IFACE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_NTP_SYNC,
g_param_spec_boolean ("ntp-sync", "Sync on NTP clock",
"Synchronize received streams to the NTP clock", DEFAULT_NTP_SYNC,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_USE_PIPELINE_CLOCK,
g_param_spec_boolean ("use-pipeline-clock", "Use pipeline clock",
"Use the pipeline running-time to set the NTP time in the RTCP SR messages",
DEFAULT_USE_PIPELINE_CLOCK,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_SDES,
g_param_spec_boxed ("sdes", "SDES",
"The SDES items of this session",
GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc::tls-validation-flags:
*
* TLS certificate validation flags used to validate server
* certificate.
*
* Since: 1.2.1
*/
g_object_class_install_property (gobject_class, PROP_TLS_VALIDATION_FLAGS,
g_param_spec_flags ("tls-validation-flags", "TLS validation flags",
"TLS certificate validation flags used to validate the server certificate",
G_TYPE_TLS_CERTIFICATE_FLAGS, DEFAULT_TLS_VALIDATION_FLAGS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc::tls-database:
*
* TLS database with anchor certificate authorities used to validate
* the server certificate.
*
* Since: 1.4
*/
g_object_class_install_property (gobject_class, PROP_TLS_DATABASE,
g_param_spec_object ("tls-database", "TLS database",
"TLS database with anchor certificate authorities used to validate the server certificate",
G_TYPE_TLS_DATABASE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc::do-retransmission:
*
* Attempt to ask the server to retransmit lost packets according to RFC4588.
*
* Note: currently only works with SSRC-multiplexed retransmission streams
*
* Since: 1.6
*/
g_object_class_install_property (gobject_class, PROP_DO_RETRANSMISSION,
g_param_spec_boolean ("do-retransmission", "Retransmission",
"Ask the server to retransmit lost packets",
DEFAULT_DO_RETRANSMISSION,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTSPSrc::handle-request:
* @rtspsrc: a #GstRTSPSrc
* @request: a #GstRTSPMessage
* @response: a #GstRTSPMessage
*
* Handle a server request in @request and prepare @response.
*
* This signal is called from the streaming thread, you should therefore not
* do any state changes on @rtspsrc because this might deadlock. If you want
* to modify the state as a result of this signal, post a
* #GST_MESSAGE_REQUEST_STATE message on the bus or signal the main thread
* in some other way.
*
* Since: 1.2
*/
gst_rtspsrc_signals[SIGNAL_HANDLE_REQUEST] =
g_signal_new ("handle-request", G_TYPE_FROM_CLASS (klass), 0,
0, NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 2,
G_TYPE_POINTER, G_TYPE_POINTER);
/**
* GstRTSPSrc::on-sdp:
* @rtspsrc: a #GstRTSPSrc
* @sdp: a #GstSDPMessage
*
* Emited when the client has retrieved the SDP and before it configures the
* streams in the SDP. @sdp can be inspected and modified.
*
* This signal is called from the streaming thread, you should therefore not
* do any state changes on @rtspsrc because this might deadlock. If you want
* to modify the state as a result of this signal, post a
* #GST_MESSAGE_REQUEST_STATE message on the bus or signal the main thread
* in some other way.
*
* Since: 1.2
*/
gst_rtspsrc_signals[SIGNAL_ON_SDP] =
g_signal_new ("on-sdp", G_TYPE_FROM_CLASS (klass), 0,
0, NULL, NULL, g_cclosure_marshal_generic, G_TYPE_NONE, 1,
GST_TYPE_SDP_MESSAGE | G_SIGNAL_TYPE_STATIC_SCOPE);
/**
* GstRTSPSrc::select-stream:
* @rtspsrc: a #GstRTSPSrc
* @num: the stream number
* @caps: the stream caps
*
* Emited before the client decides to configure the stream @num with
* @caps.
*
* Returns: %TRUE when the stream should be selected, %FALSE when the stream
* is to be ignored.
*
* Since: 1.2
*/
gst_rtspsrc_signals[SIGNAL_SELECT_STREAM] =
g_signal_new_class_handler ("select-stream", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST | G_SIGNAL_RUN_CLEANUP,
(GCallback) default_select_stream, select_stream_accum, NULL,
g_cclosure_marshal_generic, G_TYPE_BOOLEAN, 2, G_TYPE_UINT,
GST_TYPE_CAPS);
/**
* GstRTSPSrc::new-manager:
* @rtspsrc: a #GstRTSPSrc
* @manager: a #GstElement
*
* Emited after a new manager (like rtpbin) was created and the default
* properties were configured.
*
* Since: 1.4
*/
gst_rtspsrc_signals[SIGNAL_NEW_MANAGER] =
g_signal_new_class_handler ("new-manager", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST | G_SIGNAL_RUN_CLEANUP, 0, NULL, NULL,
g_cclosure_marshal_generic, G_TYPE_NONE, 1, GST_TYPE_ELEMENT);
/**
* GstRTSPSrc::request-rtcp-key:
* @rtspsrc: a #GstRTSPSrc
* @num: the stream number
*
* Signal emited to get the crypto parameters relevant to the RTCP
* stream. User should provide the key and the RTCP encryption ciphers
* and authentication, and return them wrapped in a GstCaps.
*
* Since: 1.4
*/
gst_rtspsrc_signals[SIGNAL_REQUEST_RTCP_KEY] =
g_signal_new ("request-rtcp-key", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, GST_TYPE_CAPS, 1, G_TYPE_UINT);
gstelement_class->send_event = gst_rtspsrc_send_event;
gstelement_class->provide_clock = gst_rtspsrc_provide_clock;
gstelement_class->change_state = gst_rtspsrc_change_state;
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&rtptemplate));
gst_element_class_set_static_metadata (gstelement_class,
"RTSP packet receiver", "Source/Network",
"Receive data over the network via RTSP (RFC 2326)",
"Wim Taymans <wim@fluendo.com>, "
"Thijs Vermeir <thijs.vermeir@barco.com>, "
"Lutz Mueller <lutz@topfrose.de>");
gstbin_class->handle_message = gst_rtspsrc_handle_message;
gst_rtsp_ext_list_init ();
}
static void
gst_rtspsrc_init (GstRTSPSrc * src)
{
src->conninfo.location = g_strdup (DEFAULT_LOCATION);
src->protocols = DEFAULT_PROTOCOLS;
src->debug = DEFAULT_DEBUG;
src->retry = DEFAULT_RETRY;
src->udp_timeout = DEFAULT_TIMEOUT;
gst_rtspsrc_set_tcp_timeout (src, DEFAULT_TCP_TIMEOUT);
src->latency = DEFAULT_LATENCY_MS;
src->drop_on_latency = DEFAULT_DROP_ON_LATENCY;
src->connection_speed = DEFAULT_CONNECTION_SPEED;
src->nat_method = DEFAULT_NAT_METHOD;
src->do_rtcp = DEFAULT_DO_RTCP;
src->do_rtsp_keep_alive = DEFAULT_DO_RTSP_KEEP_ALIVE;
gst_rtspsrc_set_proxy (src, DEFAULT_PROXY);
src->rtp_blocksize = DEFAULT_RTP_BLOCKSIZE;
src->user_id = g_strdup (DEFAULT_USER_ID);
src->user_pw = g_strdup (DEFAULT_USER_PW);
src->buffer_mode = DEFAULT_BUFFER_MODE;
src->client_port_range.min = 0;
src->client_port_range.max = 0;
src->udp_buffer_size = DEFAULT_UDP_BUFFER_SIZE;
src->short_header = DEFAULT_SHORT_HEADER;
src->probation = DEFAULT_PROBATION;
src->udp_reconnect = DEFAULT_UDP_RECONNECT;
src->multi_iface = g_strdup (DEFAULT_MULTICAST_IFACE);
src->ntp_sync = DEFAULT_NTP_SYNC;
src->use_pipeline_clock = DEFAULT_USE_PIPELINE_CLOCK;
src->sdes = NULL;
src->tls_validation_flags = DEFAULT_TLS_VALIDATION_FLAGS;
src->tls_database = DEFAULT_TLS_DATABASE;
src->do_retransmission = DEFAULT_DO_RETRANSMISSION;
/* get a list of all extensions */
src->extensions = gst_rtsp_ext_list_get ();
/* connect to send signal */
gst_rtsp_ext_list_connect (src->extensions, "send",
(GCallback) gst_rtspsrc_send_cb, src);
/* protects the streaming thread in interleaved mode or the polling
* thread in UDP mode. */
g_rec_mutex_init (&src->stream_rec_lock);
/* protects our state changes from multiple invocations */
g_rec_mutex_init (&src->state_rec_lock);
src->state = GST_RTSP_STATE_INVALID;
GST_OBJECT_FLAG_SET (src, GST_ELEMENT_FLAG_SOURCE);
}
static void
gst_rtspsrc_finalize (GObject * object)
{
GstRTSPSrc *rtspsrc;
rtspsrc = GST_RTSPSRC (object);
gst_rtsp_ext_list_free (rtspsrc->extensions);
g_free (rtspsrc->conninfo.location);
gst_rtsp_url_free (rtspsrc->conninfo.url);
g_free (rtspsrc->conninfo.url_str);
g_free (rtspsrc->user_id);
g_free (rtspsrc->user_pw);
g_free (rtspsrc->multi_iface);
if (rtspsrc->sdp) {
gst_sdp_message_free (rtspsrc->sdp);
rtspsrc->sdp = NULL;
}
if (rtspsrc->provided_clock)
gst_object_unref (rtspsrc->provided_clock);
if (rtspsrc->sdes)
gst_structure_free (rtspsrc->sdes);
if (rtspsrc->tls_database)
g_object_unref (rtspsrc->tls_database);
/* free locks */
g_rec_mutex_clear (&rtspsrc->stream_rec_lock);
g_rec_mutex_clear (&rtspsrc->state_rec_lock);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstClock *
gst_rtspsrc_provide_clock (GstElement * element)
{
GstRTSPSrc *src = GST_RTSPSRC (element);
GstClock *clock;
if ((clock = src->provided_clock) != NULL)
gst_object_ref (clock);
return clock;
}
/* a proxy string of the format [user:passwd@]host[:port] */
static gboolean
gst_rtspsrc_set_proxy (GstRTSPSrc * rtsp, const gchar * proxy)
{
gchar *p, *at, *col;
g_free (rtsp->proxy_user);
rtsp->proxy_user = NULL;
g_free (rtsp->proxy_passwd);
rtsp->proxy_passwd = NULL;
g_free (rtsp->proxy_host);
rtsp->proxy_host = NULL;
rtsp->proxy_port = 0;
p = (gchar *) proxy;
if (p == NULL)
return TRUE;
/* we allow http:// in front but ignore it */
if (g_str_has_prefix (p, "http://"))
p += 7;
at = strchr (p, '@');
if (at) {
/* look for user:passwd */
col = strchr (proxy, ':');
if (col == NULL || col > at)
return FALSE;
rtsp->proxy_user = g_strndup (p, col - p);
col++;
rtsp->proxy_passwd = g_strndup (col, at - col);
/* move to host */
p = at + 1;
} else {
if (rtsp->prop_proxy_id != NULL && *rtsp->prop_proxy_id != '\0')
rtsp->proxy_user = g_strdup (rtsp->prop_proxy_id);
if (rtsp->prop_proxy_pw != NULL && *rtsp->prop_proxy_pw != '\0')
rtsp->proxy_passwd = g_strdup (rtsp->prop_proxy_pw);
if (rtsp->proxy_user != NULL || rtsp->proxy_passwd != NULL) {
GST_LOG_OBJECT (rtsp, "set proxy user/pw from properties: %s:%s",
GST_STR_NULL (rtsp->proxy_user), GST_STR_NULL (rtsp->proxy_passwd));
}
}
col = strchr (p, ':');
if (col) {
/* everything before the colon is the hostname */
rtsp->proxy_host = g_strndup (p, col - p);
p = col + 1;
rtsp->proxy_port = strtoul (p, (char **) &p, 10);
} else {
rtsp->proxy_host = g_strdup (p);
rtsp->proxy_port = 8080;
}
return TRUE;
}
static void
gst_rtspsrc_set_tcp_timeout (GstRTSPSrc * rtspsrc, guint64 timeout)
{
rtspsrc->tcp_timeout.tv_sec = timeout / G_USEC_PER_SEC;
rtspsrc->tcp_timeout.tv_usec = timeout % G_USEC_PER_SEC;
if (timeout != 0)
rtspsrc->ptcp_timeout = &rtspsrc->tcp_timeout;
else
rtspsrc->ptcp_timeout = NULL;
}
static void
gst_rtspsrc_set_property (GObject * object, guint prop_id, const GValue * value,
GParamSpec * pspec)
{
GstRTSPSrc *rtspsrc;
rtspsrc = GST_RTSPSRC (object);
switch (prop_id) {
case PROP_LOCATION:
gst_rtspsrc_uri_set_uri (GST_URI_HANDLER (rtspsrc),
g_value_get_string (value), NULL);
break;
case PROP_PROTOCOLS:
rtspsrc->protocols = g_value_get_flags (value);
break;
case PROP_DEBUG:
rtspsrc->debug = g_value_get_boolean (value);
break;
case PROP_RETRY:
rtspsrc->retry = g_value_get_uint (value);
break;
case PROP_TIMEOUT:
rtspsrc->udp_timeout = g_value_get_uint64 (value);
break;
case PROP_TCP_TIMEOUT:
gst_rtspsrc_set_tcp_timeout (rtspsrc, g_value_get_uint64 (value));
break;
case PROP_LATENCY:
rtspsrc->latency = g_value_get_uint (value);
break;
case PROP_DROP_ON_LATENCY:
rtspsrc->drop_on_latency = g_value_get_boolean (value);
break;
case PROP_CONNECTION_SPEED:
rtspsrc->connection_speed = g_value_get_uint64 (value);
break;
case PROP_NAT_METHOD:
rtspsrc->nat_method = g_value_get_enum (value);
break;
case PROP_DO_RTCP:
rtspsrc->do_rtcp = g_value_get_boolean (value);
break;
case PROP_DO_RTSP_KEEP_ALIVE:
rtspsrc->do_rtsp_keep_alive = g_value_get_boolean (value);
break;
case PROP_PROXY:
gst_rtspsrc_set_proxy (rtspsrc, g_value_get_string (value));
break;
case PROP_PROXY_ID:
if (rtspsrc->prop_proxy_id)
g_free (rtspsrc->prop_proxy_id);
rtspsrc->prop_proxy_id = g_value_dup_string (value);
break;
case PROP_PROXY_PW:
if (rtspsrc->prop_proxy_pw)
g_free (rtspsrc->prop_proxy_pw);
rtspsrc->prop_proxy_pw = g_value_dup_string (value);
break;
case PROP_RTP_BLOCKSIZE:
rtspsrc->rtp_blocksize = g_value_get_uint (value);
break;
case PROP_USER_ID:
if (rtspsrc->user_id)
g_free (rtspsrc->user_id);
rtspsrc->user_id = g_value_dup_string (value);
break;
case PROP_USER_PW:
if (rtspsrc->user_pw)
g_free (rtspsrc->user_pw);
rtspsrc->user_pw = g_value_dup_string (value);
break;
case PROP_BUFFER_MODE:
rtspsrc->buffer_mode = g_value_get_enum (value);
break;
case PROP_PORT_RANGE:
{
const gchar *str;
str = g_value_get_string (value);
if (str) {
sscanf (str, "%u-%u",
&rtspsrc->client_port_range.min, &rtspsrc->client_port_range.max);
} else {
rtspsrc->client_port_range.min = 0;
rtspsrc->client_port_range.max = 0;
}
break;
}
case PROP_UDP_BUFFER_SIZE:
rtspsrc->udp_buffer_size = g_value_get_int (value);
break;
case PROP_SHORT_HEADER:
rtspsrc->short_header = g_value_get_boolean (value);
break;
case PROP_PROBATION:
rtspsrc->probation = g_value_get_uint (value);
break;
case PROP_UDP_RECONNECT:
rtspsrc->udp_reconnect = g_value_get_boolean (value);
break;
case PROP_MULTICAST_IFACE:
g_free (rtspsrc->multi_iface);
if (g_value_get_string (value) == NULL)
rtspsrc->multi_iface = g_strdup (DEFAULT_MULTICAST_IFACE);
else
rtspsrc->multi_iface = g_value_dup_string (value);
break;
case PROP_NTP_SYNC:
rtspsrc->ntp_sync = g_value_get_boolean (value);
break;
case PROP_USE_PIPELINE_CLOCK:
rtspsrc->use_pipeline_clock = g_value_get_boolean (value);
break;
case PROP_SDES:
rtspsrc->sdes = g_value_dup_boxed (value);
break;
case PROP_TLS_VALIDATION_FLAGS:
rtspsrc->tls_validation_flags = g_value_get_flags (value);
break;
case PROP_TLS_DATABASE:
g_clear_object (&rtspsrc->tls_database);
rtspsrc->tls_database = g_value_dup_object (value);
break;
case PROP_DO_RETRANSMISSION:
rtspsrc->do_retransmission = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtspsrc_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstRTSPSrc *rtspsrc;
rtspsrc = GST_RTSPSRC (object);
switch (prop_id) {
case PROP_LOCATION:
g_value_set_string (value, rtspsrc->conninfo.location);
break;
case PROP_PROTOCOLS:
g_value_set_flags (value, rtspsrc->protocols);
break;
case PROP_DEBUG:
g_value_set_boolean (value, rtspsrc->debug);
break;
case PROP_RETRY:
g_value_set_uint (value, rtspsrc->retry);
break;
case PROP_TIMEOUT:
g_value_set_uint64 (value, rtspsrc->udp_timeout);
break;
case PROP_TCP_TIMEOUT:
{
guint64 timeout;
timeout = rtspsrc->tcp_timeout.tv_sec * G_USEC_PER_SEC +
rtspsrc->tcp_timeout.tv_usec;
g_value_set_uint64 (value, timeout);
break;
}
case PROP_LATENCY:
g_value_set_uint (value, rtspsrc->latency);
break;
case PROP_DROP_ON_LATENCY:
g_value_set_boolean (value, rtspsrc->drop_on_latency);
break;
case PROP_CONNECTION_SPEED:
g_value_set_uint64 (value, rtspsrc->connection_speed);
break;
case PROP_NAT_METHOD:
g_value_set_enum (value, rtspsrc->nat_method);
break;
case PROP_DO_RTCP:
g_value_set_boolean (value, rtspsrc->do_rtcp);
break;
case PROP_DO_RTSP_KEEP_ALIVE:
g_value_set_boolean (value, rtspsrc->do_rtsp_keep_alive);
break;
case PROP_PROXY:
{
gchar *str;
if (rtspsrc->proxy_host) {
str =
g_strdup_printf ("%s:%d", rtspsrc->proxy_host, rtspsrc->proxy_port);
} else {
str = NULL;
}
g_value_take_string (value, str);
break;
}
case PROP_PROXY_ID:
g_value_set_string (value, rtspsrc->prop_proxy_id);
break;
case PROP_PROXY_PW:
g_value_set_string (value, rtspsrc->prop_proxy_pw);
break;
case PROP_RTP_BLOCKSIZE:
g_value_set_uint (value, rtspsrc->rtp_blocksize);
break;
case PROP_USER_ID:
g_value_set_string (value, rtspsrc->user_id);
break;
case PROP_USER_PW:
g_value_set_string (value, rtspsrc->user_pw);
break;
case PROP_BUFFER_MODE:
g_value_set_enum (value, rtspsrc->buffer_mode);
break;
case PROP_PORT_RANGE:
{
gchar *str;
if (rtspsrc->client_port_range.min != 0) {
str = g_strdup_printf ("%u-%u", rtspsrc->client_port_range.min,
rtspsrc->client_port_range.max);
} else {
str = NULL;
}
g_value_take_string (value, str);
break;
}
case PROP_UDP_BUFFER_SIZE:
g_value_set_int (value, rtspsrc->udp_buffer_size);
break;
case PROP_SHORT_HEADER:
g_value_set_boolean (value, rtspsrc->short_header);
break;
case PROP_PROBATION:
g_value_set_uint (value, rtspsrc->probation);
break;
case PROP_UDP_RECONNECT:
g_value_set_boolean (value, rtspsrc->udp_reconnect);
break;
case PROP_MULTICAST_IFACE:
g_value_set_string (value, rtspsrc->multi_iface);
break;
case PROP_NTP_SYNC:
g_value_set_boolean (value, rtspsrc->ntp_sync);
break;
case PROP_USE_PIPELINE_CLOCK:
g_value_set_boolean (value, rtspsrc->use_pipeline_clock);
break;
case PROP_SDES:
g_value_set_boxed (value, rtspsrc->sdes);
break;
case PROP_TLS_VALIDATION_FLAGS:
g_value_set_flags (value, rtspsrc->tls_validation_flags);
break;
case PROP_TLS_DATABASE:
g_value_set_object (value, rtspsrc->tls_database);
break;
case PROP_DO_RETRANSMISSION:
g_value_set_boolean (value, rtspsrc->do_retransmission);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gint
find_stream_by_id (GstRTSPStream * stream, gint * id)
{
if (stream->id == *id)
return 0;
return -1;
}
static gint
find_stream_by_channel (GstRTSPStream * stream, gint * channel)
{
if (stream->channel[0] == *channel || stream->channel[1] == *channel)
return 0;
return -1;
}
static gint
find_stream_by_udpsrc (GstRTSPStream * stream, gconstpointer a)
{
GstElement *src = (GstElement *) a;
if (stream->udpsrc[0] == src)
return 0;
if (stream->udpsrc[1] == src)
return 0;
return -1;
}
static gint
find_stream_by_setup (GstRTSPStream * stream, gconstpointer a)
{
if (stream->conninfo.location) {
/* check qualified setup_url */
if (!strcmp (stream->conninfo.location, (gchar *) a))
return 0;
}
if (stream->control_url) {
/* check original control_url */
if (!strcmp (stream->control_url, (gchar *) a))
return 0;
/* check if qualified setup_url ends with string */
if (g_str_has_suffix (stream->control_url, (gchar *) a))
return 0;
}
return -1;
}
static GstRTSPStream *
find_stream (GstRTSPSrc * src, gconstpointer data, gconstpointer func)
{
GList *lstream;
/* find and get stream */
if ((lstream = g_list_find_custom (src->streams, data, (GCompareFunc) func)))
return (GstRTSPStream *) lstream->data;
return NULL;
}
static const GstSDPBandwidth *
gst_rtspsrc_get_bandwidth (GstRTSPSrc * src, const GstSDPMessage * sdp,
const GstSDPMedia * media, const gchar * type)
{
guint i, len;
/* first look in the media specific section */
len = gst_sdp_media_bandwidths_len (media);
for (i = 0; i < len; i++) {
const GstSDPBandwidth *bw = gst_sdp_media_get_bandwidth (media, i);
if (strcmp (bw->bwtype, type) == 0)
return bw;
}
/* then look in the message specific section */
len = gst_sdp_message_bandwidths_len (sdp);
for (i = 0; i < len; i++) {
const GstSDPBandwidth *bw = gst_sdp_message_get_bandwidth (sdp, i);
if (strcmp (bw->bwtype, type) == 0)
return bw;
}
return NULL;
}
static void
gst_rtspsrc_collect_bandwidth (GstRTSPSrc * src, const GstSDPMessage * sdp,
const GstSDPMedia * media, GstRTSPStream * stream)
{
const GstSDPBandwidth *bw;
if ((bw = gst_rtspsrc_get_bandwidth (src, sdp, media, GST_SDP_BWTYPE_AS)))
stream->as_bandwidth = bw->bandwidth;
else
stream->as_bandwidth = -1;
if ((bw = gst_rtspsrc_get_bandwidth (src, sdp, media, GST_SDP_BWTYPE_RR)))
stream->rr_bandwidth = bw->bandwidth;
else
stream->rr_bandwidth = -1;
if ((bw = gst_rtspsrc_get_bandwidth (src, sdp, media, GST_SDP_BWTYPE_RS)))
stream->rs_bandwidth = bw->bandwidth;
else
stream->rs_bandwidth = -1;
}
static void
gst_rtspsrc_do_stream_connection (GstRTSPSrc * src, GstRTSPStream * stream,
const GstSDPConnection * conn)
{
if (conn->nettype == NULL || strcmp (conn->nettype, "IN") != 0)
return;
if (conn->addrtype == NULL)
return;
/* check for IPV6 */
if (strcmp (conn->addrtype, "IP4") == 0)
stream->is_ipv6 = FALSE;
else if (strcmp (conn->addrtype, "IP6") == 0)
stream->is_ipv6 = TRUE;
else
return;
/* save address */
g_free (stream->destination);
stream->destination = g_strdup (conn->address);
/* check for multicast */
stream->is_multicast =
gst_sdp_address_is_multicast (conn->nettype, conn->addrtype,
conn->address);
stream->ttl = conn->ttl;
}
/* Go over the connections for a stream.
* - If we are dealing with IPV6, we will setup IPV6 sockets for sending and
* receiving.
* - If we are dealing with a localhost address, we disable multicast
*/
static void
gst_rtspsrc_collect_connections (GstRTSPSrc * src, const GstSDPMessage * sdp,
const GstSDPMedia * media, GstRTSPStream * stream)
{
const GstSDPConnection *conn;
guint i, len;
/* first look in the media specific section */
len = gst_sdp_media_connections_len (media);
for (i = 0; i < len; i++) {
conn = gst_sdp_media_get_connection (media, i);
gst_rtspsrc_do_stream_connection (src, stream, conn);
}
/* then look in the message specific section */
if ((conn = gst_sdp_message_get_connection (sdp))) {
gst_rtspsrc_do_stream_connection (src, stream, conn);
}
}
/* m=<media> <UDP port> RTP/AVP <payload>
*/
static void
gst_rtspsrc_collect_payloads (GstRTSPSrc * src, const GstSDPMessage * sdp,
const GstSDPMedia * media, GstRTSPStream * stream)
{
guint i, len;
const gchar *proto;
/* get proto */
proto = gst_sdp_media_get_proto (media);
if (proto == NULL)
goto no_proto;
if (g_str_equal (proto, "RTP/AVP"))
stream->profile = GST_RTSP_PROFILE_AVP;
else if (g_str_equal (proto, "RTP/SAVP"))
stream->profile = GST_RTSP_PROFILE_SAVP;
else if (g_str_equal (proto, "RTP/AVPF"))
stream->profile = GST_RTSP_PROFILE_AVPF;
else if (g_str_equal (proto, "RTP/SAVPF"))
stream->profile = GST_RTSP_PROFILE_SAVPF;
else
goto unknown_proto;
len = gst_sdp_media_formats_len (media);
for (i = 0; i < len; i++) {
gint pt;
GstCaps *caps;
GstStructure *s;
const gchar *enc;
PtMapItem item;
pt = atoi (gst_sdp_media_get_format (media, i));
GST_DEBUG_OBJECT (src, " looking at %d pt: %d", i, pt);
/* convert caps */
caps = gst_rtspsrc_media_to_caps (pt, media);
if (caps == NULL) {
GST_WARNING_OBJECT (src, " skipping pt %d without caps", pt);
continue;
}
/* do some tweaks */
s = gst_caps_get_structure (caps, 0);
if ((enc = gst_structure_get_string (s, "encoding-name"))) {
stream->is_real = (strstr (enc, "-REAL") != NULL);
if (strcmp (enc, "X-ASF-PF") == 0)
stream->container = TRUE;
}
GST_DEBUG ("mapping sdp session level attributes to caps");
gst_rtspsrc_sdp_attributes_to_caps (sdp->attributes, caps);
GST_DEBUG ("mapping sdp media level attributes to caps");
gst_rtspsrc_sdp_attributes_to_caps (media->attributes, caps);
/* the first pt will be the default */
if (stream->ptmap->len == 0)
stream->default_pt = pt;
item.pt = pt;
item.caps = caps;
g_array_append_val (stream->ptmap, item);
}
return;
no_proto:
{
GST_ERROR_OBJECT (src, "can't find proto in media");
return;
}
unknown_proto:
{
GST_ERROR_OBJECT (src, "unknown proto in media %s", proto);
return;
}
}
static const gchar *
get_aggregate_control (GstRTSPSrc * src)
{
const gchar *base;
if (src->control)
base = src->control;
else if (src->content_base)
base = src->content_base;
else if (src->conninfo.url_str)
base = src->conninfo.url_str;
else
base = "/";
return base;
}
static void
clear_ptmap_item (PtMapItem * item)
{
if (item->caps)
gst_caps_unref (item->caps);
}
static GstRTSPStream *
gst_rtspsrc_create_stream (GstRTSPSrc * src, GstSDPMessage * sdp, gint idx)
{
GstRTSPStream *stream;
const gchar *control_url;
const GstSDPMedia *media;
/* get media, should not return NULL */
media = gst_sdp_message_get_media (sdp, idx);
if (media == NULL)
return NULL;
stream = g_new0 (GstRTSPStream, 1);
stream->parent = src;
/* we mark the pad as not linked, we will mark it as OK when we add the pad to
* the element. */
stream->last_ret = GST_FLOW_NOT_LINKED;
stream->added = FALSE;
stream->setup = FALSE;
stream->skipped = FALSE;
stream->id = idx;
stream->eos = FALSE;
stream->discont = TRUE;
stream->seqbase = -1;
stream->timebase = -1;
stream->send_ssrc = g_random_int ();
stream->profile = GST_RTSP_PROFILE_AVP;
stream->ptmap = g_array_new (FALSE, FALSE, sizeof (PtMapItem));
g_array_set_clear_func (stream->ptmap, (GDestroyNotify) clear_ptmap_item);
/* collect bandwidth information for this steam. FIXME, configure in the RTP
* session manager to scale RTCP. */
gst_rtspsrc_collect_bandwidth (src, sdp, media, stream);
/* collect connection info */
gst_rtspsrc_collect_connections (src, sdp, media, stream);
/* make the payload type map */
gst_rtspsrc_collect_payloads (src, sdp, media, stream);
/* collect port number */
stream->port = gst_sdp_media_get_port (media);
/* get control url to construct the setup url. The setup url is used to
* configure the transport of the stream and is used to identity the stream in
* the RTP-Info header field returned from PLAY. */
control_url = gst_sdp_media_get_attribute_val (media, "control");
if (control_url == NULL)
control_url = gst_sdp_message_get_attribute_val_n (sdp, "control", 0);
GST_DEBUG_OBJECT (src, "stream %d, (%p)", stream->id, stream);
GST_DEBUG_OBJECT (src, " port: %d", stream->port);
GST_DEBUG_OBJECT (src, " container: %d", stream->container);
GST_DEBUG_OBJECT (src, " control: %s", GST_STR_NULL (control_url));
if (control_url != NULL) {
stream->control_url = g_strdup (control_url);
/* Build a fully qualified url using the content_base if any or by prefixing
* the original request.
* If the control_url starts with a '/' or a non rtsp: protocol we will most
* likely build a URL that the server will fail to understand, this is ok,
* we will fail then. */
if (g_str_has_prefix (control_url, "rtsp://"))
stream->conninfo.location = g_strdup (control_url);
else {
const gchar *base;
gboolean has_slash;
if (g_strcmp0 (control_url, "*") == 0)
control_url = "";
base = get_aggregate_control (src);
/* check if the base ends or control starts with / */
has_slash = g_str_has_prefix (control_url, "/");
has_slash = has_slash || g_str_has_suffix (base, "/");
/* concatenate the two strings, insert / when not present */
stream->conninfo.location =
g_strdup_printf ("%s%s%s", base, has_slash ? "" : "/", control_url);
}
}
GST_DEBUG_OBJECT (src, " setup: %s",
GST_STR_NULL (stream->conninfo.location));
/* we keep track of all streams */
src->streams = g_list_append (src->streams, stream);
return stream;
/* ERRORS */
}
static void
gst_rtspsrc_stream_free (GstRTSPSrc * src, GstRTSPStream * stream)
{
gint i;
GST_DEBUG_OBJECT (src, "free stream %p", stream);
g_array_free (stream->ptmap, TRUE);
g_free (stream->destination);
g_free (stream->control_url);
g_free (stream->conninfo.location);
for (i = 0; i < 2; i++) {
if (stream->udpsrc[i]) {
gst_element_set_state (stream->udpsrc[i], GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (src), stream->udpsrc[i]);
gst_object_unref (stream->udpsrc[i]);
}
if (stream->channelpad[i])
gst_object_unref (stream->channelpad[i]);
if (stream->udpsink[i]) {
gst_element_set_state (stream->udpsink[i], GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (src), stream->udpsink[i]);
gst_object_unref (stream->udpsink[i]);
}
}
if (stream->fakesrc) {
gst_element_set_state (stream->fakesrc, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (src), stream->fakesrc);
gst_object_unref (stream->fakesrc);
}
if (stream->srcpad) {
gst_pad_set_active (stream->srcpad, FALSE);
if (stream->added)
gst_element_remove_pad (GST_ELEMENT_CAST (src), stream->srcpad);
}
if (stream->srtpenc)
gst_object_unref (stream->srtpenc);
if (stream->srtpdec)
gst_object_unref (stream->srtpdec);
if (stream->srtcpparams)
gst_caps_unref (stream->srtcpparams);
if (stream->rtcppad)
gst_object_unref (stream->rtcppad);
if (stream->session)
g_object_unref (stream->session);
if (stream->rtx_pt_map)
gst_structure_free (stream->rtx_pt_map);
g_free (stream);
}
static void
gst_rtspsrc_cleanup (GstRTSPSrc * src)
{
GList *walk;
GST_DEBUG_OBJECT (src, "cleanup");
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
gst_rtspsrc_stream_free (src, stream);
}
g_list_free (src->streams);
src->streams = NULL;
if (src->manager) {
if (src->manager_sig_id) {
g_signal_handler_disconnect (src->manager, src->manager_sig_id);
src->manager_sig_id = 0;
}
gst_element_set_state (src->manager, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (src), src->manager);
src->manager = NULL;
}
if (src->props)
gst_structure_free (src->props);
src->props = NULL;
g_free (src->content_base);
src->content_base = NULL;
g_free (src->control);
src->control = NULL;
if (src->range)
gst_rtsp_range_free (src->range);
src->range = NULL;
/* don't clear the SDP when it was used in the url */
if (src->sdp && !src->from_sdp) {
gst_sdp_message_free (src->sdp);
src->sdp = NULL;
}
src->need_segment = FALSE;
if (src->provided_clock) {
gst_object_unref (src->provided_clock);
src->provided_clock = NULL;
}
}
#define PARSE_INT(p, del, res) \
G_STMT_START { \
gchar *t = p; \
p = strstr (p, del); \
if (p == NULL) \
res = -1; \
else { \
*p = '\0'; \
p++; \
res = atoi (t); \
} \
} G_STMT_END
#define PARSE_STRING(p, del, res) \
G_STMT_START { \
gchar *t = p; \
p = strstr (p, del); \
if (p == NULL) { \
res = NULL; \
p = t; \
} \
else { \
*p = '\0'; \
p++; \
res = t; \
} \
} G_STMT_END
#define SKIP_SPACES(p) \
while (*p && g_ascii_isspace (*p)) \
p++;
/* rtpmap contains:
*
* <payload> <encoding_name>/<clock_rate>[/<encoding_params>]
*/
static gboolean
gst_rtspsrc_parse_rtpmap (const gchar * rtpmap, gint * payload, gchar ** name,
gint * rate, gchar ** params)
{
gchar *p, *t;
p = (gchar *) rtpmap;
PARSE_INT (p, " ", *payload);
if (*payload == -1)
return FALSE;
SKIP_SPACES (p);
if (*p == '\0')
return FALSE;
PARSE_STRING (p, "/", *name);
if (*name == NULL) {
GST_DEBUG ("no rate, name %s", p);
/* no rate, assume -1 then, this is not supposed to happen but RealMedia
* streams seem to omit the rate. */
*name = p;
*rate = -1;
return TRUE;
}
t = p;
p = strstr (p, "/");
if (p == NULL) {
*rate = atoi (t);
return TRUE;
}
*p = '\0';
p++;
*rate = atoi (t);
t = p;
if (*p == '\0')
return TRUE;
*params = t;
return TRUE;
}
static gboolean
parse_keymgmt (const gchar * keymgmt, GstCaps * caps)
{
gboolean res = FALSE;
gchar *p, *kmpid;
gsize size;
guchar *data;
GstMIKEYMessage *msg;
const GstMIKEYPayload *payload;
const gchar *srtp_cipher;
const gchar *srtp_auth;
p = (gchar *) keymgmt;
SKIP_SPACES (p);
if (*p == '\0')
return FALSE;
PARSE_STRING (p, " ", kmpid);
if (!g_str_equal (kmpid, "mikey"))
return FALSE;
data = g_base64_decode (p, &size);
if (data == NULL)
return FALSE;
msg = gst_mikey_message_new_from_data (data, size, NULL, NULL);
g_free (data);
if (msg == NULL)
return FALSE;
srtp_cipher = "aes-128-icm";
srtp_auth = "hmac-sha1-80";
/* check the Security policy if any */
if ((payload = gst_mikey_message_find_payload (msg, GST_MIKEY_PT_SP, 0))) {
GstMIKEYPayloadSP *p = (GstMIKEYPayloadSP *) payload;
guint len, i;
if (p->proto != GST_MIKEY_SEC_PROTO_SRTP)
goto done;
len = gst_mikey_payload_sp_get_n_params (payload);
for (i = 0; i < len; i++) {
const GstMIKEYPayloadSPParam *param =
gst_mikey_payload_sp_get_param (payload, i);
switch (param->type) {
case GST_MIKEY_SP_SRTP_ENC_ALG:
switch (param->val[0]) {
case 0:
srtp_cipher = "null";
break;
case 2:
case 1:
srtp_cipher = "aes-128-icm";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_ENC_KEY_LEN:
switch (param->val[0]) {
case AES_128_KEY_LEN:
srtp_cipher = "aes-128-icm";
break;
case AES_256_KEY_LEN:
srtp_cipher = "aes-256-icm";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_AUTH_ALG:
switch (param->val[0]) {
case 0:
srtp_auth = "null";
break;
case 2:
case 1:
srtp_auth = "hmac-sha1-80";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_AUTH_KEY_LEN:
switch (param->val[0]) {
case HMAC_32_KEY_LEN:
srtp_auth = "hmac-sha1-32";
break;
case HMAC_80_KEY_LEN:
srtp_auth = "hmac-sha1-80";
break;
default:
break;
}
break;
case GST_MIKEY_SP_SRTP_SRTP_ENC:
break;
case GST_MIKEY_SP_SRTP_SRTCP_ENC:
break;
default:
break;
}
}
}
if (!(payload = gst_mikey_message_find_payload (msg, GST_MIKEY_PT_KEMAC, 0)))
goto done;
else {
GstMIKEYPayloadKEMAC *p = (GstMIKEYPayloadKEMAC *) payload;
const GstMIKEYPayload *sub;
GstMIKEYPayloadKeyData *pkd;
GstBuffer *buf;
if (p->enc_alg != GST_MIKEY_ENC_NULL || p->mac_alg != GST_MIKEY_MAC_NULL)
goto done;
if (!(sub = gst_mikey_payload_kemac_get_sub (payload, 0)))
goto done;
if (sub->type != GST_MIKEY_PT_KEY_DATA)
goto done;
pkd = (GstMIKEYPayloadKeyData *) sub;
buf =
gst_buffer_new_wrapped (g_memdup (pkd->key_data, pkd->key_len),
pkd->key_len);
gst_caps_set_simple (caps, "srtp-key", GST_TYPE_BUFFER, buf, NULL);
}
gst_caps_set_simple (caps,
"srtp-cipher", G_TYPE_STRING, srtp_cipher,
"srtp-auth", G_TYPE_STRING, srtp_auth,
"srtcp-cipher", G_TYPE_STRING, srtp_cipher,
"srtcp-auth", G_TYPE_STRING, srtp_auth, NULL);
res = TRUE;
done:
gst_mikey_message_unref (msg);
return res;
}
/*
* Mapping SDP attributes to caps
*
* prepend 'a-' to IANA registered sdp attributes names
* (ie: not prefixed with 'x-') in order to avoid
* collision with gstreamer standard caps properties names
*/
static void
gst_rtspsrc_sdp_attributes_to_caps (GArray * attributes, GstCaps * caps)
{
if (attributes->len > 0) {
GstStructure *s;
guint i;
s = gst_caps_get_structure (caps, 0);
for (i = 0; i < attributes->len; i++) {
GstSDPAttribute *attr = &g_array_index (attributes, GstSDPAttribute, i);
gchar *tofree, *key;
key = attr->key;
/* skip some of the attribute we already handle */
if (!strcmp (key, "fmtp"))
continue;
if (!strcmp (key, "rtpmap"))
continue;
if (!strcmp (key, "control"))
continue;
if (!strcmp (key, "range"))
continue;
if (!strcmp (key, "framesize"))
continue;
if (g_str_equal (key, "key-mgmt")) {
parse_keymgmt (attr->value, caps);
continue;
}
/* string must be valid UTF8 */
if (!g_utf8_validate (attr->value, -1, NULL))
continue;
if (!g_str_has_prefix (key, "x-"))
tofree = key = g_strdup_printf ("a-%s", key);
else
tofree = NULL;
GST_DEBUG ("adding caps: %s=%s", key, attr->value);
gst_structure_set (s, key, G_TYPE_STRING, attr->value, NULL);
g_free (tofree);
}
}
}
static const gchar *
rtsp_get_attribute_for_pt (const GstSDPMedia * media, const gchar * name,
gint pt)
{
guint i;
for (i = 0;; i++) {
const gchar *attr;
gint val;
if ((attr = gst_sdp_media_get_attribute_val_n (media, name, i)) == NULL)
break;
if (sscanf (attr, "%d ", &val) != 1)
continue;
if (val == pt)
return attr;
}
return NULL;
}
/*
* Mapping of caps to and from SDP fields:
*
* a=rtpmap:<payload> <encoding_name>/<clock_rate>[/<encoding_params>]
* a=framesize:<payload> <width>-<height>
* a=fmtp:<payload> <param>[=<value>];...
*/
static GstCaps *
gst_rtspsrc_media_to_caps (gint pt, const GstSDPMedia * media)
{
GstCaps *caps;
const gchar *rtpmap;
const gchar *fmtp;
const gchar *framesize;
gchar *name = NULL;
gint rate = -1;
gchar *params = NULL;
gchar *tmp;
GstStructure *s;
gint payload = 0;
gboolean ret;
/* get and parse rtpmap */
rtpmap = rtsp_get_attribute_for_pt (media, "rtpmap", pt);
if (rtpmap) {
ret = gst_rtspsrc_parse_rtpmap (rtpmap, &payload, &name, &rate, &params);
if (!ret) {
g_warning ("error parsing rtpmap, ignoring");
rtpmap = NULL;
}
}
/* dynamic payloads need rtpmap or we fail */
if (rtpmap == NULL && pt >= 96)
goto no_rtpmap;
/* check if we have a rate, if not, we need to look up the rate from the
* default rates based on the payload types. */
if (rate == -1) {
const GstRTPPayloadInfo *info;
if (GST_RTP_PAYLOAD_IS_DYNAMIC (pt)) {
/* dynamic types, use media and encoding_name */
tmp = g_ascii_strdown (media->media, -1);
info = gst_rtp_payload_info_for_name (tmp, name);
g_free (tmp);
} else {
/* static types, use payload type */
info = gst_rtp_payload_info_for_pt (pt);
}
if (info) {
if ((rate = info->clock_rate) == 0)
rate = -1;
}
/* we fail if we cannot find one */
if (rate == -1)
goto no_rate;
}
tmp = g_ascii_strdown (media->media, -1);
caps = gst_caps_new_simple ("application/x-unknown",
"media", G_TYPE_STRING, tmp, "payload", G_TYPE_INT, pt, NULL);
g_free (tmp);
s = gst_caps_get_structure (caps, 0);
gst_structure_set (s, "clock-rate", G_TYPE_INT, rate, NULL);
/* encoding name must be upper case */
if (name != NULL) {
tmp = g_ascii_strup (name, -1);
gst_structure_set (s, "encoding-name", G_TYPE_STRING, tmp, NULL);
g_free (tmp);
}
/* params must be lower case */
if (params != NULL) {
tmp = g_ascii_strdown (params, -1);
gst_structure_set (s, "encoding-params", G_TYPE_STRING, tmp, NULL);
g_free (tmp);
}
/* parse optional fmtp: field */
if ((fmtp = rtsp_get_attribute_for_pt (media, "fmtp", pt))) {
gchar *p;
gint payload = 0;
p = (gchar *) fmtp;
/* p is now of the format <payload> <param>[=<value>];... */
PARSE_INT (p, " ", payload);
if (payload != -1 && payload == pt) {
gchar **pairs;
gint i;
/* <param>[=<value>] are separated with ';' */
pairs = g_strsplit (p, ";", 0);
for (i = 0; pairs[i]; i++) {
gchar *valpos;
const gchar *val, *key;
/* the key may not have a '=', the value can have other '='s */
valpos = strstr (pairs[i], "=");
if (valpos) {
/* we have a '=' and thus a value, remove the '=' with \0 */
*valpos = '\0';
/* value is everything between '=' and ';'. We split the pairs at ;
* boundaries so we can take the remainder of the value. Some servers
* put spaces around the value which we strip off here. Alternatively
* we could strip those spaces in the depayloaders should these spaces
* actually carry any meaning in the future. */
val = g_strstrip (valpos + 1);
} else {
/* simple <param>;.. is translated into <param>=1;... */
val = "1";
}
/* strip the key of spaces, convert key to lowercase but not the value. */
key = g_strstrip (pairs[i]);
if (strlen (key) > 1) {
tmp = g_ascii_strdown (key, -1);
gst_structure_set (s, tmp, G_TYPE_STRING, val, NULL);
g_free (tmp);
}
}
g_strfreev (pairs);
}
}
/* parse framesize: field */
if ((framesize = gst_sdp_media_get_attribute_val (media, "framesize"))) {
gchar *p;
/* p is now of the format <payload> <width>-<height> */
p = (gchar *) framesize;
PARSE_INT (p, " ", payload);
if (payload != -1 && payload == pt) {
gst_structure_set (s, "a-framesize", G_TYPE_STRING, p, NULL);
}
}
return caps;
/* ERRORS */
no_rtpmap:
{
g_warning ("rtpmap type not given for dynamic payload %d", pt);
return NULL;
}
no_rate:
{
g_warning ("rate unknown for payload type %d", pt);
return NULL;
}
}
static gboolean
gst_rtspsrc_alloc_udp_ports (GstRTSPStream * stream,
gint * rtpport, gint * rtcpport)
{
GstRTSPSrc *src;
GstStateChangeReturn ret;
GstElement *udpsrc0, *udpsrc1;
gint tmp_rtp, tmp_rtcp;
guint count;
const gchar *host;
src = stream->parent;
udpsrc0 = NULL;
udpsrc1 = NULL;
count = 0;
/* Start at next port */
tmp_rtp = src->next_port_num;
if (stream->is_ipv6)
host = "udp://[::0]";
else
host = "udp://0.0.0.0";
/* try to allocate 2 UDP ports, the RTP port should be an even
* number and the RTCP port should be the next (uneven) port */
again:
if (tmp_rtp != 0 && src->client_port_range.max > 0 &&
tmp_rtp >= src->client_port_range.max)
goto no_ports;
udpsrc0 = gst_element_make_from_uri (GST_URI_SRC, host, NULL, NULL);
if (udpsrc0 == NULL)
goto no_udp_protocol;
g_object_set (G_OBJECT (udpsrc0), "port", tmp_rtp, "reuse", FALSE, NULL);
if (src->udp_buffer_size != 0)
g_object_set (G_OBJECT (udpsrc0), "buffer-size", src->udp_buffer_size,
NULL);
ret = gst_element_set_state (udpsrc0, GST_STATE_READY);
if (ret == GST_STATE_CHANGE_FAILURE) {
if (tmp_rtp != 0) {
GST_DEBUG_OBJECT (src, "Unable to make udpsrc from RTP port %d", tmp_rtp);
tmp_rtp += 2;
if (++count > src->retry)
goto no_ports;
GST_DEBUG_OBJECT (src, "free RTP udpsrc");
gst_element_set_state (udpsrc0, GST_STATE_NULL);
gst_object_unref (udpsrc0);
udpsrc0 = NULL;
GST_DEBUG_OBJECT (src, "retry %d", count);
goto again;
}
goto no_udp_protocol;
}
g_object_get (G_OBJECT (udpsrc0), "port", &tmp_rtp, NULL);
GST_DEBUG_OBJECT (src, "got RTP port %d", tmp_rtp);
/* check if port is even */
if ((tmp_rtp & 0x01) != 0) {
/* port not even, close and allocate another */
if (++count > src->retry)
goto no_ports;
GST_DEBUG_OBJECT (src, "RTP port not even");
GST_DEBUG_OBJECT (src, "free RTP udpsrc");
gst_element_set_state (udpsrc0, GST_STATE_NULL);
gst_object_unref (udpsrc0);
udpsrc0 = NULL;
GST_DEBUG_OBJECT (src, "retry %d", count);
tmp_rtp++;
goto again;
}
/* allocate port+1 for RTCP now */
udpsrc1 = gst_element_make_from_uri (GST_URI_SRC, host, NULL, NULL);
if (udpsrc1 == NULL)
goto no_udp_rtcp_protocol;
/* set port */
tmp_rtcp = tmp_rtp + 1;
if (src->client_port_range.max > 0 && tmp_rtcp > src->client_port_range.max)
goto no_ports;
g_object_set (G_OBJECT (udpsrc1), "port", tmp_rtcp, "reuse", FALSE, NULL);
GST_DEBUG_OBJECT (src, "starting RTCP on port %d", tmp_rtcp);
ret = gst_element_set_state (udpsrc1, GST_STATE_READY);
/* tmp_rtcp port is busy already : retry to make rtp/rtcp pair */
if (ret == GST_STATE_CHANGE_FAILURE) {
GST_DEBUG_OBJECT (src, "Unable to make udpsrc from RTCP port %d", tmp_rtcp);
if (++count > src->retry)
goto no_ports;
GST_DEBUG_OBJECT (src, "free RTP udpsrc");
gst_element_set_state (udpsrc0, GST_STATE_NULL);
gst_object_unref (udpsrc0);
udpsrc0 = NULL;
GST_DEBUG_OBJECT (src, "free RTCP udpsrc");
gst_element_set_state (udpsrc1, GST_STATE_NULL);
gst_object_unref (udpsrc1);
udpsrc1 = NULL;
tmp_rtp += 2;
GST_DEBUG_OBJECT (src, "retry %d", count);
goto again;
}
/* all fine, do port check */
g_object_get (G_OBJECT (udpsrc0), "port", rtpport, NULL);
g_object_get (G_OBJECT (udpsrc1), "port", rtcpport, NULL);
/* this should not happen... */
if (*rtpport != tmp_rtp || *rtcpport != tmp_rtcp)
goto port_error;
/* we keep these elements, we configure all in configure_transport when the
* server told us to really use the UDP ports. */
stream->udpsrc[0] = gst_object_ref_sink (udpsrc0);
stream->udpsrc[1] = gst_object_ref_sink (udpsrc1);
gst_element_set_locked_state (stream->udpsrc[0], TRUE);
gst_element_set_locked_state (stream->udpsrc[1], TRUE);
/* keep track of next available port number when we have a range
* configured */
if (src->next_port_num != 0)
src->next_port_num = tmp_rtcp + 1;
return TRUE;
/* ERRORS */
no_udp_protocol:
{
GST_DEBUG_OBJECT (src, "could not get UDP source");
goto cleanup;
}
no_ports:
{
GST_DEBUG_OBJECT (src, "could not allocate UDP port pair after %d retries",
count);
goto cleanup;
}
no_udp_rtcp_protocol:
{
GST_DEBUG_OBJECT (src, "could not get UDP source for RTCP");
goto cleanup;
}
port_error:
{
GST_DEBUG_OBJECT (src, "ports don't match rtp: %d<->%d, rtcp: %d<->%d",
tmp_rtp, *rtpport, tmp_rtcp, *rtcpport);
goto cleanup;
}
cleanup:
{
if (udpsrc0) {
gst_element_set_state (udpsrc0, GST_STATE_NULL);
gst_object_unref (udpsrc0);
}
if (udpsrc1) {
gst_element_set_state (udpsrc1, GST_STATE_NULL);
gst_object_unref (udpsrc1);
}
return FALSE;
}
}
static void
gst_rtspsrc_set_state (GstRTSPSrc * src, GstState state)
{
GList *walk;
if (src->manager)
gst_element_set_state (GST_ELEMENT_CAST (src->manager), state);
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
gint i;
for (i = 0; i < 2; i++) {
if (stream->udpsrc[i])
gst_element_set_state (stream->udpsrc[i], state);
}
}
}
static void
gst_rtspsrc_flush (GstRTSPSrc * src, gboolean flush, gboolean playing)
{
GstEvent *event;
gint cmd;
GstState state;
if (flush) {
event = gst_event_new_flush_start ();
GST_DEBUG_OBJECT (src, "start flush");
cmd = CMD_WAIT;
state = GST_STATE_PAUSED;
} else {
event = gst_event_new_flush_stop (FALSE);
GST_DEBUG_OBJECT (src, "stop flush; playing %d", playing);
cmd = CMD_LOOP;
if (playing)
state = GST_STATE_PLAYING;
else
state = GST_STATE_PAUSED;
}
gst_rtspsrc_push_event (src, event);
gst_rtspsrc_loop_send_cmd (src, cmd, CMD_LOOP);
gst_rtspsrc_set_state (src, state);
}
static GstRTSPResult
gst_rtspsrc_connection_send (GstRTSPSrc * src, GstRTSPConnection * conn,
GstRTSPMessage * message, GTimeVal * timeout)
{
GstRTSPResult ret;
if (conn)
ret = gst_rtsp_connection_send (conn, message, timeout);
else
ret = GST_RTSP_ERROR;
return ret;
}
static GstRTSPResult
gst_rtspsrc_connection_receive (GstRTSPSrc * src, GstRTSPConnection * conn,
GstRTSPMessage * message, GTimeVal * timeout)
{
GstRTSPResult ret;
if (conn)
ret = gst_rtsp_connection_receive (conn, message, timeout);
else
ret = GST_RTSP_ERROR;
return ret;
}
static void
gst_rtspsrc_get_position (GstRTSPSrc * src)
{
GstQuery *query;
GList *walk;
query = gst_query_new_position (GST_FORMAT_TIME);
/* should be known somewhere down the stream (e.g. jitterbuffer) */
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
GstFormat fmt;
gint64 pos;
if (stream->srcpad) {
if (gst_pad_query (stream->srcpad, query)) {
gst_query_parse_position (query, &fmt, &pos);
GST_DEBUG_OBJECT (src, "retaining position %" GST_TIME_FORMAT,
GST_TIME_ARGS (pos));
src->last_pos = pos;
goto out;
}
}
}
src->last_pos = 0;
out:
gst_query_unref (query);
}
static gboolean
gst_rtspsrc_perform_seek (GstRTSPSrc * src, GstEvent * event)
{
gdouble rate;
GstFormat format;
GstSeekFlags flags;
GstSeekType cur_type = GST_SEEK_TYPE_NONE, stop_type;
gint64 cur, stop;
gboolean flush, skip;
gboolean update;
gboolean playing;
GstSegment seeksegment = { 0, };
GList *walk;
if (event) {
GST_DEBUG_OBJECT (src, "doing seek with event");
gst_event_parse_seek (event, &rate, &format, &flags,
&cur_type, &cur, &stop_type, &stop);
/* no negative rates yet */
if (rate < 0.0)
goto negative_rate;
/* we need TIME format */
if (format != src->segment.format)
goto no_format;
} else {
GST_DEBUG_OBJECT (src, "doing seek without event");
flags = 0;
cur_type = GST_SEEK_TYPE_SET;
stop_type = GST_SEEK_TYPE_SET;
}
/* get flush flag */
flush = flags & GST_SEEK_FLAG_FLUSH;
skip = flags & GST_SEEK_FLAG_SKIP;
/* now we need to make sure the streaming thread is stopped. We do this by
* either sending a FLUSH_START event downstream which will cause the
* streaming thread to stop with a WRONG_STATE.
* For a non-flushing seek we simply pause the task, which will happen as soon
* as it completes one iteration (and thus might block when the sink is
* blocking in preroll). */
if (flush) {
GST_DEBUG_OBJECT (src, "starting flush");
gst_rtspsrc_flush (src, TRUE, FALSE);
} else {
if (src->task) {
gst_task_pause (src->task);
}
}
/* we should now be able to grab the streaming thread because we stopped it
* with the above flush/pause code */
GST_RTSP_STREAM_LOCK (src);
GST_DEBUG_OBJECT (src, "stopped streaming");
/* stop flushing the rtsp connection so we can send PAUSE/PLAY below */
gst_rtspsrc_connection_flush (src, FALSE);
/* copy segment, we need this because we still need the old
* segment when we close the current segment. */
memcpy (&seeksegment, &src->segment, sizeof (GstSegment));
/* configure the seek parameters in the seeksegment. We will then have the
* right values in the segment to perform the seek */
if (event) {
GST_DEBUG_OBJECT (src, "configuring seek");
gst_segment_do_seek (&seeksegment, rate, format, flags,
cur_type, cur, stop_type, stop, &update);
}
/* figure out the last position we need to play. If it's configured (stop !=
* -1), use that, else we play until the total duration of the file */
if ((stop = seeksegment.stop) == -1)
stop = seeksegment.duration;
playing = (src->state == GST_RTSP_STATE_PLAYING);
/* if we were playing, pause first */
if (playing) {
/* obtain current position in case seek fails */
gst_rtspsrc_get_position (src);
gst_rtspsrc_pause (src, FALSE);
}
src->skip = skip;
src->state = GST_RTSP_STATE_SEEKING;
/* PLAY will add the range header now. */
src->need_range = TRUE;
/* and continue playing */
if (playing)
gst_rtspsrc_play (src, &seeksegment, FALSE);
/* prepare for streaming again */
if (flush) {
/* if we started flush, we stop now */
GST_DEBUG_OBJECT (src, "stopping flush");
gst_rtspsrc_flush (src, FALSE, playing);
}
/* now we did the seek and can activate the new segment values */
memcpy (&src->segment, &seeksegment, sizeof (GstSegment));
/* if we're doing a segment seek, post a SEGMENT_START message */
if (src->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT_CAST (src),
gst_message_new_segment_start (GST_OBJECT_CAST (src),
src->segment.format, src->segment.position));
}
/* now create the newsegment */
GST_DEBUG_OBJECT (src, "Creating newsegment from %" G_GINT64_FORMAT
" to %" G_GINT64_FORMAT, src->segment.position, stop);
/* mark discont */
GST_DEBUG_OBJECT (src, "mark DISCONT, we did a seek to another position");
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
stream->discont = TRUE;
}
GST_RTSP_STREAM_UNLOCK (src);
return TRUE;
/* ERRORS */
negative_rate:
{
GST_DEBUG_OBJECT (src, "negative playback rates are not supported yet.");
return FALSE;
}
no_format:
{
GST_DEBUG_OBJECT (src, "unsupported format given, seek aborted.");
return FALSE;
}
}
static gboolean
gst_rtspsrc_handle_src_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
GstRTSPSrc *src;
gboolean res = TRUE;
gboolean forward;
src = GST_RTSPSRC_CAST (parent);
GST_DEBUG_OBJECT (src, "pad %s:%s received event %s",
GST_DEBUG_PAD_NAME (pad), GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
res = gst_rtspsrc_perform_seek (src, event);
forward = FALSE;
break;
case GST_EVENT_QOS:
case GST_EVENT_NAVIGATION:
case GST_EVENT_LATENCY:
default:
forward = TRUE;
break;
}
if (forward) {
GstPad *target;
if ((target = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (pad)))) {
res = gst_pad_send_event (target, event);
gst_object_unref (target);
} else {
gst_event_unref (event);
}
} else {
gst_event_unref (event);
}
return res;
}
/* this is the final event function we receive on the internal source pad when
* we deal with TCP connections */
static gboolean
gst_rtspsrc_handle_internal_src_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
gboolean res;
GST_DEBUG_OBJECT (pad, "received event %s", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_SEEK:
case GST_EVENT_QOS:
case GST_EVENT_NAVIGATION:
case GST_EVENT_LATENCY:
default:
gst_event_unref (event);
res = TRUE;
break;
}
return res;
}
/* this is the final query function we receive on the internal source pad when
* we deal with TCP connections */
static gboolean
gst_rtspsrc_handle_internal_src_query (GstPad * pad, GstObject * parent,
GstQuery * query)
{
GstRTSPSrc *src;
gboolean res = TRUE;
src = GST_RTSPSRC_CAST (gst_pad_get_element_private (pad));
GST_DEBUG_OBJECT (src, "pad %s:%s received query %s",
GST_DEBUG_PAD_NAME (pad), GST_QUERY_TYPE_NAME (query));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_POSITION:
{
/* no idea */
break;
}
case GST_QUERY_DURATION:
{
GstFormat format;
gst_query_parse_duration (query, &format, NULL);
switch (format) {
case GST_FORMAT_TIME:
gst_query_set_duration (query, format, src->segment.duration);
break;
default:
res = FALSE;
break;
}
break;
}
case GST_QUERY_LATENCY:
{
/* we are live with a min latency of 0 and unlimited max latency, this
* result will be updated by the session manager if there is any. */
gst_query_set_latency (query, TRUE, 0, -1);
break;
}
default:
break;
}
return res;
}
/* this query is executed on the ghost source pad exposed on rtspsrc. */
static gboolean
gst_rtspsrc_handle_src_query (GstPad * pad, GstObject * parent,
GstQuery * query)
{
GstRTSPSrc *src;
gboolean res = FALSE;
src = GST_RTSPSRC_CAST (parent);
GST_DEBUG_OBJECT (src, "pad %s:%s received query %s",
GST_DEBUG_PAD_NAME (pad), GST_QUERY_TYPE_NAME (query));
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_DURATION:
{
GstFormat format;
gst_query_parse_duration (query, &format, NULL);
switch (format) {
case GST_FORMAT_TIME:
gst_query_set_duration (query, format, src->segment.duration);
res = TRUE;
break;
default:
break;
}
break;
}
case GST_QUERY_SEEKING:
{
GstFormat format;
gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
if (format == GST_FORMAT_TIME) {
gboolean seekable =
src->cur_protocols != GST_RTSP_LOWER_TRANS_UDP_MCAST;
/* seeking without duration is unlikely */
seekable = seekable && src->seekable && src->segment.duration &&
GST_CLOCK_TIME_IS_VALID (src->segment.duration);
gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0,
src->segment.duration);
res = TRUE;
}
break;
}
case GST_QUERY_URI:
{
gchar *uri;
uri = gst_rtspsrc_uri_get_uri (GST_URI_HANDLER (src));
if (uri != NULL) {
gst_query_set_uri (query, uri);
g_free (uri);
res = TRUE;
}
break;
}
default:
{
GstPad *target = gst_ghost_pad_get_target (GST_GHOST_PAD_CAST (pad));
/* forward the query to the proxy target pad */
if (target) {
res = gst_pad_query (target, query);
gst_object_unref (target);
}
break;
}
}
return res;
}
/* callback for RTCP messages to be sent to the server when operating in TCP
* mode. */
static GstFlowReturn
gst_rtspsrc_sink_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstRTSPSrc *src;
GstRTSPStream *stream;
GstFlowReturn res = GST_FLOW_OK;
GstMapInfo map;
guint8 *data;
guint size;
GstRTSPResult ret;
GstRTSPMessage message = { 0 };
GstRTSPConnection *conn;
stream = (GstRTSPStream *) gst_pad_get_element_private (pad);
src = stream->parent;
gst_buffer_map (buffer, &map, GST_MAP_READ);
size = map.size;
data = map.data;
gst_rtsp_message_init_data (&message, stream->channel[1]);
/* lend the body data to the message */
gst_rtsp_message_take_body (&message, data, size);
if (stream->conninfo.connection)
conn = stream->conninfo.connection;
else
conn = src->conninfo.connection;
GST_DEBUG_OBJECT (src, "sending %u bytes RTCP", size);
ret = gst_rtspsrc_connection_send (src, conn, &message, NULL);
GST_DEBUG_OBJECT (src, "sent RTCP, %d", ret);
/* and steal it away again because we will free it when unreffing the
* buffer */
gst_rtsp_message_steal_body (&message, &data, &size);
gst_rtsp_message_unset (&message);
gst_buffer_unmap (buffer, &map);
gst_buffer_unref (buffer);
return res;
}
static GstPadProbeReturn
pad_blocked (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
{
GstRTSPSrc *src = user_data;
GST_DEBUG_OBJECT (src, "pad %s:%s blocked, activating streams",
GST_DEBUG_PAD_NAME (pad));
/* activate the streams */
GST_OBJECT_LOCK (src);
if (!src->need_activate)
goto was_ok;
src->need_activate = FALSE;
GST_OBJECT_UNLOCK (src);
gst_rtspsrc_activate_streams (src);
return GST_PAD_PROBE_OK;
was_ok:
{
GST_OBJECT_UNLOCK (src);
return GST_PAD_PROBE_OK;
}
}
static gboolean
copy_sticky_events (GstPad * pad, GstEvent ** event, gpointer user_data)
{
GstPad *gpad = GST_PAD_CAST (user_data);
GST_DEBUG_OBJECT (gpad, "store sticky event %" GST_PTR_FORMAT, *event);
gst_pad_store_sticky_event (gpad, *event);
return TRUE;
}
/* this callback is called when the session manager generated a new src pad with
* payloaded RTP packets. We simply ghost the pad here. */
static void
new_manager_pad (GstElement * manager, GstPad * pad, GstRTSPSrc * src)
{
gchar *name;
GstPadTemplate *template;
gint id, ssrc, pt;
GList *ostreams;
GstRTSPStream *stream;
gboolean all_added;
GST_DEBUG_OBJECT (src, "got new manager pad %" GST_PTR_FORMAT, pad);
GST_RTSP_STATE_LOCK (src);
/* find stream */
name = gst_object_get_name (GST_OBJECT_CAST (pad));
if (sscanf (name, "recv_rtp_src_%u_%u_%u", &id, &ssrc, &pt) != 3)
goto unknown_stream;
GST_DEBUG_OBJECT (src, "stream: %u, SSRC %08x, PT %d", id, ssrc, pt);
stream = find_stream (src, &id, (gpointer) find_stream_by_id);
if (stream == NULL)
goto unknown_stream;
/* save SSRC */
stream->ssrc = ssrc;
/* we'll add it later see below */
stream->added = TRUE;
/* check if we added all streams */
all_added = TRUE;
for (ostreams = src->streams; ostreams; ostreams = g_list_next (ostreams)) {
GstRTSPStream *ostream = (GstRTSPStream *) ostreams->data;
GST_DEBUG_OBJECT (src, "stream %p, container %d, added %d, setup %d",
ostream, ostream->container, ostream->added, ostream->setup);
/* if we find a stream for which we did a setup that is not added, we
* need to wait some more */
if (ostream->setup && !ostream->added) {
all_added = FALSE;
break;
}
}
GST_RTSP_STATE_UNLOCK (src);
/* create a new pad we will use to stream to */
template = gst_static_pad_template_get (&rtptemplate);
stream->srcpad = gst_ghost_pad_new_from_template (name, pad, template);
gst_object_unref (template);
g_free (name);
gst_pad_set_event_function (stream->srcpad, gst_rtspsrc_handle_src_event);
gst_pad_set_query_function (stream->srcpad, gst_rtspsrc_handle_src_query);
gst_pad_set_active (stream->srcpad, TRUE);
gst_pad_sticky_events_foreach (pad, copy_sticky_events, stream->srcpad);
gst_element_add_pad (GST_ELEMENT_CAST (src), stream->srcpad);
if (all_added) {
GST_DEBUG_OBJECT (src, "We added all streams");
/* when we get here, all stream are added and we can fire the no-more-pads
* signal. */
gst_element_no_more_pads (GST_ELEMENT_CAST (src));
}
return;
/* ERRORS */
unknown_stream:
{
GST_DEBUG_OBJECT (src, "ignoring unknown stream");
GST_RTSP_STATE_UNLOCK (src);
g_free (name);
return;
}
}
static GstCaps *
stream_get_caps_for_pt (GstRTSPStream * stream, guint pt)
{
guint i, len;
len = stream->ptmap->len;
for (i = 0; i < len; i++) {
PtMapItem *item = &g_array_index (stream->ptmap, PtMapItem, i);
if (item->pt == pt)
return item->caps;
}
return NULL;
}
static GstCaps *
request_pt_map (GstElement * manager, guint session, guint pt, GstRTSPSrc * src)
{
GstRTSPStream *stream;
GstCaps *caps;
GST_DEBUG_OBJECT (src, "getting pt map for pt %d in session %d", pt, session);
GST_RTSP_STATE_LOCK (src);
stream = find_stream (src, &session, (gpointer) find_stream_by_id);
if (!stream)
goto unknown_stream;
if ((caps = stream_get_caps_for_pt (stream, pt)))
gst_caps_ref (caps);
GST_RTSP_STATE_UNLOCK (src);
return caps;
unknown_stream:
{
GST_DEBUG_OBJECT (src, "unknown stream %d", session);
GST_RTSP_STATE_UNLOCK (src);
return NULL;
}
}
static void
gst_rtspsrc_do_stream_eos (GstRTSPSrc * src, GstRTSPStream * stream)
{
GST_DEBUG_OBJECT (src, "setting stream for session %u to EOS", stream->id);
if (stream->eos)
goto was_eos;
stream->eos = TRUE;
gst_rtspsrc_stream_push_event (src, stream, gst_event_new_eos ());
return;
/* ERRORS */
was_eos:
{
GST_DEBUG_OBJECT (src, "stream for session %u was already EOS", stream->id);
return;
}
}
static void
on_bye_ssrc (GObject * session, GObject * source, GstRTSPStream * stream)
{
GstRTSPSrc *src = stream->parent;
guint ssrc;
g_object_get (source, "ssrc", &ssrc, NULL);
GST_DEBUG_OBJECT (src, "source %08x, stream %08x, session %u received BYE",
ssrc, stream->ssrc, stream->id);
if (ssrc == stream->ssrc)
gst_rtspsrc_do_stream_eos (src, stream);
}
static void
on_timeout (GObject * session, GObject * source, GstRTSPStream * stream)
{
GstRTSPSrc *src = stream->parent;
guint ssrc;
g_object_get (source, "ssrc", &ssrc, NULL);
GST_WARNING_OBJECT (src, "source %08x, stream %08x in session %u timed out",
ssrc, stream->ssrc, stream->id);
if (ssrc == stream->ssrc)
gst_rtspsrc_do_stream_eos (src, stream);
}
static void
on_npt_stop (GstElement * rtpbin, guint session, guint ssrc, GstRTSPSrc * src)
{
GstRTSPStream *stream;
GST_DEBUG_OBJECT (src, "source in session %u reached NPT stop", session);
/* get stream for session */
stream = find_stream (src, &session, (gpointer) find_stream_by_id);
if (stream) {
gst_rtspsrc_do_stream_eos (src, stream);
}
}
static void
on_ssrc_active (GObject * session, GObject * source, GstRTSPStream * stream)
{
GST_DEBUG_OBJECT (stream->parent, "source in session %u is active",
stream->id);
}
static void
set_manager_buffer_mode (GstRTSPSrc * src)
{
GObjectClass *klass;
if (src->manager == NULL)
return;
klass = G_OBJECT_GET_CLASS (G_OBJECT (src->manager));
if (!g_object_class_find_property (klass, "buffer-mode"))
return;
if (src->buffer_mode != BUFFER_MODE_AUTO) {
g_object_set (src->manager, "buffer-mode", src->buffer_mode, NULL);
return;
}
GST_DEBUG_OBJECT (src,
"auto buffering mode, have clock %" GST_PTR_FORMAT, src->provided_clock);
if (src->provided_clock) {
GstClock *clock = gst_element_get_clock (GST_ELEMENT_CAST (src));
if (clock == src->provided_clock) {
GST_DEBUG_OBJECT (src, "selected synced");
g_object_set (src->manager, "buffer-mode", BUFFER_MODE_SYNCED, NULL);
if (clock)
gst_object_unref (clock);
return;
}
/* Otherwise fall-through and use another buffer mode */
if (clock)
gst_object_unref (clock);
}
GST_DEBUG_OBJECT (src, "auto buffering mode");
if (src->use_buffering) {
GST_DEBUG_OBJECT (src, "selected buffer");
g_object_set (src->manager, "buffer-mode", BUFFER_MODE_BUFFER, NULL);
} else {
GST_DEBUG_OBJECT (src, "selected slave");
g_object_set (src->manager, "buffer-mode", BUFFER_MODE_SLAVE, NULL);
}
}
static GstCaps *
request_key (GstElement * srtpdec, guint ssrc, GstRTSPStream * stream)
{
GST_DEBUG ("request key %u", ssrc);
return gst_caps_ref (stream_get_caps_for_pt (stream, stream->default_pt));
}
static GstElement *
request_rtp_decoder (GstElement * rtpbin, guint session, GstRTSPStream * stream)
{
GST_DEBUG ("decoder session %u, stream %p, %d", session, stream, stream->id);
if (stream->id != session)
return NULL;
if (stream->profile != GST_RTSP_PROFILE_SAVP &&
stream->profile != GST_RTSP_PROFILE_SAVPF)
return NULL;
if (stream->srtpdec == NULL) {
gchar *name;
name = g_strdup_printf ("srtpdec_%u", session);
stream->srtpdec = gst_element_factory_make ("srtpdec", name);
g_free (name);
g_signal_connect (stream->srtpdec, "request-key",
(GCallback) request_key, stream);
}
return gst_object_ref (stream->srtpdec);
}
static GstElement *
request_rtcp_encoder (GstElement * rtpbin, guint session,
GstRTSPStream * stream)
{
gchar *name;
GstPad *pad;
GST_DEBUG ("decoder session %u, stream %p, %d", session, stream, stream->id);
if (stream->id != session)
return NULL;
if (stream->profile != GST_RTSP_PROFILE_SAVP &&
stream->profile != GST_RTSP_PROFILE_SAVPF)
return NULL;
if (stream->srtpenc == NULL) {
GstStructure *s;
name = g_strdup_printf ("srtpenc_%u", session);
stream->srtpenc = gst_element_factory_make ("srtpenc", name);
g_free (name);
/* get RTCP crypto parameters from caps */
s = gst_caps_get_structure (stream->srtcpparams, 0);
if (s) {
GstBuffer *buf;
const gchar *str;
GType ciphertype, authtype;
GValue rtcp_cipher = G_VALUE_INIT, rtcp_auth = G_VALUE_INIT;
ciphertype = g_type_from_name ("GstSrtpCipherType");
authtype = g_type_from_name ("GstSrtpAuthType");
g_value_init (&rtcp_cipher, ciphertype);
g_value_init (&rtcp_auth, authtype);
str = gst_structure_get_string (s, "srtcp-cipher");
gst_value_deserialize (&rtcp_cipher, str);
str = gst_structure_get_string (s, "srtcp-auth");
gst_value_deserialize (&rtcp_auth, str);
gst_structure_get (s, "srtp-key", GST_TYPE_BUFFER, &buf, NULL);
g_object_set_property (G_OBJECT (stream->srtpenc), "rtcp-cipher",
&rtcp_cipher);
g_object_set_property (G_OBJECT (stream->srtpenc), "rtcp-auth",
&rtcp_auth);
g_object_set (stream->srtpenc, "key", buf, NULL);
g_value_unset (&rtcp_cipher);
g_value_unset (&rtcp_auth);
gst_buffer_unref (buf);
}
}
name = g_strdup_printf ("rtcp_sink_%d", session);
pad = gst_element_get_request_pad (stream->srtpenc, name);
g_free (name);
gst_object_unref (pad);
return gst_object_ref (stream->srtpenc);
}
static GstElement *
request_aux_receiver (GstElement * rtpbin, guint sessid, GstRTSPSrc * src)
{
GstElement *rtx, *bin;
GstPad *pad;
gchar *name;
GstRTSPStream *stream;
stream = find_stream (src, &sessid, (gpointer) find_stream_by_id);
if (!stream) {
GST_WARNING_OBJECT (src, "Stream %u not found", sessid);
return NULL;
}
GST_INFO_OBJECT (src, "creating retransmision receiver for session %u "
"with map %" GST_PTR_FORMAT, sessid, stream->rtx_pt_map);
bin = gst_bin_new (NULL);
rtx = gst_element_factory_make ("rtprtxreceive", NULL);
g_object_set (rtx, "payload-type-map", stream->rtx_pt_map, NULL);
gst_bin_add (GST_BIN (bin), rtx);
pad = gst_element_get_static_pad (rtx, "src");
name = g_strdup_printf ("src_%u", sessid);
gst_element_add_pad (bin, gst_ghost_pad_new (name, pad));
g_free (name);
gst_object_unref (pad);
pad = gst_element_get_static_pad (rtx, "sink");
name = g_strdup_printf ("sink_%u", sessid);
gst_element_add_pad (bin, gst_ghost_pad_new (name, pad));
g_free (name);
gst_object_unref (pad);
return bin;
}
static void
add_retransmission (GstRTSPSrc * src, GstRTSPTransport * transport)
{
GList *walk;
guint signal_id;
gboolean do_retransmission = FALSE;
if (transport->trans != GST_RTSP_TRANS_RTP)
return;
if (transport->profile != GST_RTSP_PROFILE_AVPF &&
transport->profile != GST_RTSP_PROFILE_SAVPF)
return;
signal_id = g_signal_lookup ("request-aux-receiver",
G_OBJECT_TYPE (src->manager));
/* there's already something connected */
if (g_signal_handler_find (src->manager, G_SIGNAL_MATCH_ID, signal_id, 0,
NULL, NULL, NULL) != 0) {
GST_DEBUG_OBJECT (src, "Not adding RTX AUX element as "
"\"request-aux-receiver\" signal is "
"already used by the application");
return;
}
/* build the retransmission payload type map */
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
gboolean do_retransmission_stream = FALSE;
int i;
if (stream->rtx_pt_map)
gst_structure_free (stream->rtx_pt_map);
stream->rtx_pt_map = gst_structure_new_empty ("application/x-rtp-pt-map");
for (i = 0; i < stream->ptmap->len; i++) {
PtMapItem *item = &g_array_index (stream->ptmap, PtMapItem, i);
GstStructure *s = gst_caps_get_structure (item->caps, 0);
const gchar *encoding;
/* we only care about RTX streams */
if ((encoding = gst_structure_get_string (s, "encoding-name"))
&& g_strcmp0 (encoding, "RTX") == 0) {
const gchar *stream_pt_s;
gint rtx_pt;
if (gst_structure_get_int (s, "payload", &rtx_pt)
&& (stream_pt_s = gst_structure_get_string (s, "apt"))) {
if (rtx_pt != 0) {
gst_structure_set (stream->rtx_pt_map, stream_pt_s, G_TYPE_UINT,
rtx_pt, NULL);
do_retransmission_stream = TRUE;
}
}
}
}
if (do_retransmission_stream) {
GST_DEBUG_OBJECT (src, "built retransmission payload map for stream "
"id %i: %" GST_PTR_FORMAT, stream->id, stream->rtx_pt_map);
do_retransmission = TRUE;
} else {
GST_DEBUG_OBJECT (src, "no retransmission payload map for stream "
"id %i", stream->id);
gst_structure_free (stream->rtx_pt_map);
stream->rtx_pt_map = NULL;
}
}
if (do_retransmission) {
GST_DEBUG_OBJECT (src, "Enabling retransmissions");
g_object_set (src->manager, "do-retransmission", TRUE, NULL);
/* enable RFC4588 retransmission handling by setting rtprtxreceive
* as the "aux" element of rtpbin */
g_signal_connect (src->manager, "request-aux-receiver",
(GCallback) request_aux_receiver, src);
} else {
GST_DEBUG_OBJECT (src,
"Not enabling retransmissions as no stream had a retransmission payload map");
}
}
/* try to get and configure a manager */
static gboolean
gst_rtspsrc_stream_configure_manager (GstRTSPSrc * src, GstRTSPStream * stream,
GstRTSPTransport * transport)
{
const gchar *manager;
gchar *name;
GstStateChangeReturn ret;
/* find a manager */
if (gst_rtsp_transport_get_manager (transport->trans, &manager, 0) < 0)
goto no_manager;
if (manager) {
GST_DEBUG_OBJECT (src, "using manager %s", manager);
/* configure the manager */
if (src->manager == NULL) {
GObjectClass *klass;
if (!(src->manager = gst_element_factory_make (manager, "manager"))) {
/* fallback */
if (gst_rtsp_transport_get_manager (transport->trans, &manager, 1) < 0)
goto no_manager;
if (!manager)
goto use_no_manager;
if (!(src->manager = gst_element_factory_make (manager, "manager")))
goto manager_failed;
}
/* we manage this element */
gst_element_set_locked_state (src->manager, TRUE);
gst_bin_add (GST_BIN_CAST (src), src->manager);
ret = gst_element_set_state (src->manager, GST_STATE_PAUSED);
if (ret == GST_STATE_CHANGE_FAILURE)
goto start_manager_failure;
g_object_set (src->manager, "latency", src->latency, NULL);
klass = G_OBJECT_GET_CLASS (G_OBJECT (src->manager));
if (g_object_class_find_property (klass, "ntp-sync")) {
g_object_set (src->manager, "ntp-sync", src->ntp_sync, NULL);
}
if (g_object_class_find_property (klass, "use-pipeline-clock")) {
g_object_set (src->manager, "use-pipeline-clock",
src->use_pipeline_clock, NULL);
}
if (src->sdes && g_object_class_find_property (klass, "sdes")) {
g_object_set (src->manager, "sdes", src->sdes, NULL);
}
if (g_object_class_find_property (klass, "drop-on-latency")) {
g_object_set (src->manager, "drop-on-latency", src->drop_on_latency,
NULL);
}
/* buffer mode pauses are handled by adding offsets to buffer times,
* but some depayloaders may have a hard time syncing output times
* with such input times, e.g. container ones, most notably ASF */
/* TODO alternatives are having an event that indicates these shifts,
* or having rtsp extensions provide suggestion on buffer mode */
/* valid duration implies not likely live pipeline,
* so slaving in jitterbuffer does not make much sense
* (and might mess things up due to bursts) */
if (GST_CLOCK_TIME_IS_VALID (src->segment.duration) &&
src->segment.duration && stream->container) {
src->use_buffering = TRUE;
} else {
src->use_buffering = FALSE;
}
set_manager_buffer_mode (src);
/* connect to signals */
GST_DEBUG_OBJECT (src, "connect to signals on session manager, stream %p",
stream);
src->manager_sig_id =
g_signal_connect (src->manager, "pad-added",
(GCallback) new_manager_pad, src);
src->manager_ptmap_id =
g_signal_connect (src->manager, "request-pt-map",
(GCallback) request_pt_map, src);
g_signal_connect (src->manager, "on-npt-stop", (GCallback) on_npt_stop,
src);
g_signal_emit (src, gst_rtspsrc_signals[SIGNAL_NEW_MANAGER], 0,
src->manager);
if (src->do_retransmission)
add_retransmission (src, transport);
}
g_signal_connect (src->manager, "request-rtp-decoder",
(GCallback) request_rtp_decoder, stream);
g_signal_connect (src->manager, "request-rtcp-decoder",
(GCallback) request_rtp_decoder, stream);
g_signal_connect (src->manager, "request-rtcp-encoder",
(GCallback) request_rtcp_encoder, stream);
/* we stream directly to the manager, get some pads. Each RTSP stream goes
* into a separate RTP session. */
name = g_strdup_printf ("recv_rtp_sink_%u", stream->id);
stream->channelpad[0] = gst_element_get_request_pad (src->manager, name);
g_free (name);
name = g_strdup_printf ("recv_rtcp_sink_%u", stream->id);
stream->channelpad[1] = gst_element_get_request_pad (src->manager, name);
g_free (name);
/* now configure the bandwidth in the manager */
if (g_signal_lookup ("get-internal-session",
G_OBJECT_TYPE (src->manager)) != 0) {
GObject *rtpsession;
g_signal_emit_by_name (src->manager, "get-internal-session", stream->id,
&rtpsession);
if (rtpsession) {
GST_INFO_OBJECT (src, "configure bandwidth in session %p", rtpsession);
stream->session = rtpsession;
if (stream->as_bandwidth != -1) {
GST_INFO_OBJECT (src, "setting AS: %f",
(gdouble) (stream->as_bandwidth * 1000));
g_object_set (rtpsession, "bandwidth",
(gdouble) (stream->as_bandwidth * 1000), NULL);
}
if (stream->rr_bandwidth != -1) {
GST_INFO_OBJECT (src, "setting RR: %u", stream->rr_bandwidth);
g_object_set (rtpsession, "rtcp-rr-bandwidth", stream->rr_bandwidth,
NULL);
}
if (stream->rs_bandwidth != -1) {
GST_INFO_OBJECT (src, "setting RS: %u", stream->rs_bandwidth);
g_object_set (rtpsession, "rtcp-rs-bandwidth", stream->rs_bandwidth,
NULL);
}
g_object_set (rtpsession, "probation", src->probation, NULL);
g_object_set (rtpsession, "internal-ssrc", stream->send_ssrc, NULL);
g_signal_connect (rtpsession, "on-bye-ssrc", (GCallback) on_bye_ssrc,
stream);
g_signal_connect (rtpsession, "on-bye-timeout", (GCallback) on_timeout,
stream);
g_signal_connect (rtpsession, "on-timeout", (GCallback) on_timeout,
stream);
g_signal_connect (rtpsession, "on-ssrc-active",
(GCallback) on_ssrc_active, stream);
}
}
}
use_no_manager:
return TRUE;
/* ERRORS */
no_manager:
{
GST_DEBUG_OBJECT (src, "cannot get a session manager");
return FALSE;
}
manager_failed:
{
GST_DEBUG_OBJECT (src, "no session manager element %s found", manager);
return FALSE;
}
start_manager_failure:
{
GST_DEBUG_OBJECT (src, "could not start session manager");
return FALSE;
}
}
/* free the UDP sources allocated when negotiating a transport.
* This function is called when the server negotiated to a transport where the
* UDP sources are not needed anymore, such as TCP or multicast. */
static void
gst_rtspsrc_stream_free_udp (GstRTSPStream * stream)
{
gint i;
for (i = 0; i < 2; i++) {
if (stream->udpsrc[i]) {
GST_DEBUG ("free UDP source %d for stream %p", i, stream);
gst_element_set_state (stream->udpsrc[i], GST_STATE_NULL);
gst_object_unref (stream->udpsrc[i]);
stream->udpsrc[i] = NULL;
}
}
}
/* for TCP, create pads to send and receive data to and from the manager and to
* intercept various events and queries
*/
static gboolean
gst_rtspsrc_stream_configure_tcp (GstRTSPSrc * src, GstRTSPStream * stream,
GstRTSPTransport * transport, GstPad ** outpad)
{
gchar *name;
GstPadTemplate *template;
GstPad *pad0, *pad1;
/* configure for interleaved delivery, nothing needs to be done
* here, the loop function will call the chain functions of the
* session manager. */
stream->channel[0] = transport->interleaved.min;
stream->channel[1] = transport->interleaved.max;
GST_DEBUG_OBJECT (src, "stream %p on channels %d-%d", stream,
stream->channel[0], stream->channel[1]);
/* we can remove the allocated UDP ports now */
gst_rtspsrc_stream_free_udp (stream);
/* no session manager, send data to srcpad directly */
if (!stream->channelpad[0]) {
GST_DEBUG_OBJECT (src, "no manager, creating pad");
/* create a new pad we will use to stream to */
name = g_strdup_printf ("stream_%u", stream->id);
template = gst_static_pad_template_get (&rtptemplate);
stream->channelpad[0] = gst_pad_new_from_template (template, name);
gst_object_unref (template);
g_free (name);
/* set caps and activate */
gst_pad_use_fixed_caps (stream->channelpad[0]);
gst_pad_set_active (stream->channelpad[0], TRUE);
*outpad = gst_object_ref (stream->channelpad[0]);
} else {
GST_DEBUG_OBJECT (src, "using manager source pad");
template = gst_static_pad_template_get (&anysrctemplate);
/* allocate pads for sending the channel data into the manager */
pad0 = gst_pad_new_from_template (template, "internalsrc_0");
gst_pad_link_full (pad0, stream->channelpad[0], GST_PAD_LINK_CHECK_NOTHING);
gst_object_unref (stream->channelpad[0]);
stream->channelpad[0] = pad0;
gst_pad_set_event_function (pad0, gst_rtspsrc_handle_internal_src_event);
gst_pad_set_query_function (pad0, gst_rtspsrc_handle_internal_src_query);
gst_pad_set_element_private (pad0, src);
gst_pad_set_active (pad0, TRUE);
if (stream->channelpad[1]) {
/* if we have a sinkpad for the other channel, create a pad and link to the
* manager. */
pad1 = gst_pad_new_from_template (template, "internalsrc_1");
gst_pad_set_event_function (pad1, gst_rtspsrc_handle_internal_src_event);
gst_pad_link_full (pad1, stream->channelpad[1],
GST_PAD_LINK_CHECK_NOTHING);
gst_object_unref (stream->channelpad[1]);
stream->channelpad[1] = pad1;
gst_pad_set_active (pad1, TRUE);
}
gst_object_unref (template);
}
/* setup RTCP transport back to the server if we have to. */
if (src->manager && src->do_rtcp) {
GstPad *pad;
template = gst_static_pad_template_get (&anysinktemplate);
stream->rtcppad = gst_pad_new_from_template (template, "internalsink_0");
gst_pad_set_chain_function (stream->rtcppad, gst_rtspsrc_sink_chain);
gst_pad_set_element_private (stream->rtcppad, stream);
gst_pad_set_active (stream->rtcppad, TRUE);
/* get session RTCP pad */
name = g_strdup_printf ("send_rtcp_src_%u", stream->id);
pad = gst_element_get_request_pad (src->manager, name);
g_free (name);
/* and link */
if (pad) {
gst_pad_link_full (pad, stream->rtcppad, GST_PAD_LINK_CHECK_NOTHING);
gst_object_unref (pad);
}
gst_object_unref (template);
}
return TRUE;
}
static void
gst_rtspsrc_get_transport_info (GstRTSPSrc * src, GstRTSPStream * stream,
GstRTSPTransport * transport, const gchar ** destination, gint * min,
gint * max, guint * ttl)
{
if (transport->lower_transport == GST_RTSP_LOWER_TRANS_UDP_MCAST) {
if (destination) {
if (!(*destination = transport->destination))
*destination = stream->destination;
}
if (min && max) {
/* transport first */
*min = transport->port.min;
*max = transport->port.max;
if (*min == -1 && *max == -1) {
/* then try from SDP */
if (stream->port != 0) {
*min = stream->port;
*max = stream->port + 1;
}
}
}
if (ttl) {
if (!(*ttl = transport->ttl))
*ttl = stream->ttl;
}
} else {
if (destination) {
/* first take the source, then the endpoint to figure out where to send
* the RTCP. */
if (!(*destination = transport->source)) {
if (src->conninfo.connection)
*destination = gst_rtsp_connection_get_ip (src->conninfo.connection);
else if (stream->conninfo.connection)
*destination =
gst_rtsp_connection_get_ip (stream->conninfo.connection);
}
}
if (min && max) {
/* for unicast we only expect the ports here */
*min = transport->server_port.min;
*max = transport->server_port.max;
}
}
}
/* For multicast create UDP sources and join the multicast group. */
static gboolean
gst_rtspsrc_stream_configure_mcast (GstRTSPSrc * src, GstRTSPStream * stream,
GstRTSPTransport * transport, GstPad ** outpad)
{
gchar *uri;
const gchar *destination;
gint min, max;
GST_DEBUG_OBJECT (src, "creating UDP sources for multicast");
/* we can remove the allocated UDP ports now */
gst_rtspsrc_stream_free_udp (stream);
gst_rtspsrc_get_transport_info (src, stream, transport, &destination, &min,
&max, NULL);
/* we need a destination now */
if (destination == NULL)
goto no_destination;
/* we really need ports now or we won't be able to receive anything at all */
if (min == -1 && max == -1)
goto no_ports;
GST_DEBUG_OBJECT (src, "have destination '%s' and ports (%d)-(%d)",
destination, min, max);
/* creating UDP source for RTP */
if (min != -1) {
uri = g_strdup_printf ("udp://%s:%d", destination, min);
stream->udpsrc[0] =
gst_element_make_from_uri (GST_URI_SRC, uri, NULL, NULL);
g_free (uri);
if (stream->udpsrc[0] == NULL)
goto no_element;
/* take ownership */
gst_object_ref_sink (stream->udpsrc[0]);
if (src->udp_buffer_size != 0)
g_object_set (G_OBJECT (stream->udpsrc[0]), "buffer-size",
src->udp_buffer_size, NULL);
if (src->multi_iface != NULL)
g_object_set (G_OBJECT (stream->udpsrc[0]), "multicast-iface",
src->multi_iface, NULL);
/* change state */
gst_element_set_locked_state (stream->udpsrc[0], TRUE);
gst_element_set_state (stream->udpsrc[0], GST_STATE_READY);
}
/* creating another UDP source for RTCP */
if (max != -1) {
GstCaps *caps;
uri = g_strdup_printf ("udp://%s:%d", destination, max);
stream->udpsrc[1] =
gst_element_make_from_uri (GST_URI_SRC, uri, NULL, NULL);
g_free (uri);
if (stream->udpsrc[1] == NULL)
goto no_element;
if (stream->profile == GST_RTSP_PROFILE_SAVP ||
stream->profile == GST_RTSP_PROFILE_SAVPF)
caps = gst_caps_new_empty_simple ("application/x-srtcp");
else
caps = gst_caps_new_empty_simple ("application/x-rtcp");
g_object_set (stream->udpsrc[1], "caps", caps, NULL);
gst_caps_unref (caps);
/* take ownership */
gst_object_ref_sink (stream->udpsrc[1]);
if (src->multi_iface != NULL)
g_object_set (G_OBJECT (stream->udpsrc[0]), "multicast-iface",
src->multi_iface, NULL);
gst_element_set_state (stream->udpsrc[1], GST_STATE_READY);
}
return TRUE;
/* ERRORS */
no_element:
{
GST_DEBUG_OBJECT (src, "no UDP source element found");
return FALSE;
}
no_destination:
{
GST_DEBUG_OBJECT (src, "no destination found");
return FALSE;
}
no_ports:
{
GST_DEBUG_OBJECT (src, "no ports found");
return FALSE;
}
}
/* configure the remainder of the UDP ports */
static gboolean
gst_rtspsrc_stream_configure_udp (GstRTSPSrc * src, GstRTSPStream * stream,
GstRTSPTransport * transport, GstPad ** outpad)
{
/* we manage the UDP elements now. For unicast, the UDP sources where
* allocated in the stream when we suggested a transport. */
if (stream->udpsrc[0]) {
GstCaps *caps;
gst_element_set_locked_state (stream->udpsrc[0], TRUE);
gst_bin_add (GST_BIN_CAST (src), stream->udpsrc[0]);
GST_DEBUG_OBJECT (src, "setting up UDP source");
/* configure a timeout on the UDP port. When the timeout message is
* posted, we assume UDP transport is not possible. We reconnect using TCP
* if we can. */
g_object_set (G_OBJECT (stream->udpsrc[0]), "timeout",
src->udp_timeout * 1000, NULL);
if ((caps = stream_get_caps_for_pt (stream, stream->default_pt)))
g_object_set (stream->udpsrc[0], "caps", caps, NULL);
/* get output pad of the UDP source. */
*outpad = gst_element_get_static_pad (stream->udpsrc[0], "src");
/* save it so we can unblock */
stream->blockedpad = *outpad;
/* configure pad block on the pad. As soon as there is dataflow on the
* UDP source, we know that UDP is not blocked by a firewall and we can
* configure all the streams to let the application autoplug decoders. */
stream->blockid =
gst_pad_add_probe (stream->blockedpad,
GST_PAD_PROBE_TYPE_BLOCK | GST_PAD_PROBE_TYPE_BUFFER |
GST_PAD_PROBE_TYPE_BUFFER_LIST, pad_blocked, src, NULL);
if (stream->channelpad[0]) {
GST_DEBUG_OBJECT (src, "connecting UDP source 0 to manager");
/* configure for UDP delivery, we need to connect the UDP pads to
* the session plugin. */
gst_pad_link_full (*outpad, stream->channelpad[0],
GST_PAD_LINK_CHECK_NOTHING);
gst_object_unref (*outpad);
*outpad = NULL;
/* we connected to pad-added signal to get pads from the manager */
} else {
GST_DEBUG_OBJECT (src, "using UDP src pad as output");
}
}
/* RTCP port */
if (stream->udpsrc[1]) {
GstCaps *caps;
gst_element_set_locked_state (stream->udpsrc[1], TRUE);
gst_bin_add (GST_BIN_CAST (src), stream->udpsrc[1]);
if (stream->profile == GST_RTSP_PROFILE_SAVP ||
stream->profile == GST_RTSP_PROFILE_SAVPF)
caps = gst_caps_new_empty_simple ("application/x-srtcp");
else
caps = gst_caps_new_empty_simple ("application/x-rtcp");
g_object_set (stream->udpsrc[1], "caps", caps, NULL);
gst_caps_unref (caps);
if (stream->channelpad[1]) {
GstPad *pad;
GST_DEBUG_OBJECT (src, "connecting UDP source 1 to manager");
pad = gst_element_get_static_pad (stream->udpsrc[1], "src");
gst_pad_link_full (pad, stream->channelpad[1],
GST_PAD_LINK_CHECK_NOTHING);
gst_object_unref (pad);
} else {
/* leave unlinked */
}
}
return TRUE;
}
/* configure the UDP sink back to the server for status reports */
static gboolean
gst_rtspsrc_stream_configure_udp_sinks (GstRTSPSrc * src,
GstRTSPStream * stream, GstRTSPTransport * transport)
{
GstPad *pad;
gint rtp_port, rtcp_port;
gboolean do_rtp, do_rtcp;
const gchar *destination;
gchar *uri, *name;
guint ttl = 0;
GSocket *socket;
/* get transport info */
gst_rtspsrc_get_transport_info (src, stream, transport, &destination,
&rtp_port, &rtcp_port, &ttl);
/* see what we need to do */
do_rtp = (rtp_port != -1);
/* it's possible that the server does not want us to send RTCP in which case
* the port is -1 */
do_rtcp = (rtcp_port != -1 && src->manager != NULL && src->do_rtcp);
/* we need a destination when we have RTP or RTCP ports */
if (destination == NULL && (do_rtp || do_rtcp))
goto no_destination;
/* try to construct the fakesrc to the RTP port of the server to open up any
* NAT firewalls */
if (do_rtp) {
GST_DEBUG_OBJECT (src, "configure RTP UDP sink for %s:%d", destination,
rtp_port);
uri = g_strdup_printf ("udp://%s:%d", destination, rtp_port);
stream->udpsink[0] =
gst_element_make_from_uri (GST_URI_SINK, uri, NULL, NULL);
g_free (uri);
if (stream->udpsink[0] == NULL)
goto no_sink_element;
/* don't join multicast group, we will have the source socket do that */
/* no sync or async state changes needed */
g_object_set (G_OBJECT (stream->udpsink[0]), "auto-multicast", FALSE,
"loop", FALSE, "sync", FALSE, "async", FALSE, NULL);
if (ttl > 0)
g_object_set (G_OBJECT (stream->udpsink[0]), "ttl", ttl, NULL);
if (stream->udpsrc[0]) {
/* configure socket, we give it the same UDP socket as the udpsrc for RTP
* so that NAT firewalls will open a hole for us */
g_object_get (G_OBJECT (stream->udpsrc[0]), "used-socket", &socket, NULL);
GST_DEBUG_OBJECT (src, "RTP UDP src has sock %p", socket);
/* configure socket and make sure udpsink does not close it when shutting
* down, it belongs to udpsrc after all. */
g_object_set (G_OBJECT (stream->udpsink[0]), "socket", socket,
"close-socket", FALSE, NULL);
g_object_unref (socket);
}
/* the source for the dummy packets to open up NAT */
stream->fakesrc = gst_element_factory_make ("fakesrc", NULL);
if (stream->fakesrc == NULL)
goto no_fakesrc_element;
/* random data in 5 buffers, a size of 200 bytes should be fine */
g_object_set (G_OBJECT (stream->fakesrc), "filltype", 3, "num-buffers", 5,
"sizetype", 2, "sizemax", 200, "silent", TRUE, NULL);
/* we don't want to consider this a sink */
GST_OBJECT_FLAG_UNSET (stream->udpsink[0], GST_ELEMENT_FLAG_SINK);
/* keep everything locked */
gst_element_set_locked_state (stream->udpsink[0], TRUE);
gst_element_set_locked_state (stream->fakesrc, TRUE);
gst_object_ref (stream->udpsink[0]);
gst_bin_add (GST_BIN_CAST (src), stream->udpsink[0]);
gst_object_ref (stream->fakesrc);
gst_bin_add (GST_BIN_CAST (src), stream->fakesrc);
gst_element_link_pads_full (stream->fakesrc, "src", stream->udpsink[0],
"sink", GST_PAD_LINK_CHECK_NOTHING);
}
if (do_rtcp) {
GST_DEBUG_OBJECT (src, "configure RTCP UDP sink for %s:%d", destination,
rtcp_port);
uri = g_strdup_printf ("udp://%s:%d", destination, rtcp_port);
stream->udpsink[1] =
gst_element_make_from_uri (GST_URI_SINK, uri, NULL, NULL);
g_free (uri);
if (stream->udpsink[1] == NULL)
goto no_sink_element;
/* don't join multicast group, we will have the source socket do that */
/* no sync or async state changes needed */
g_object_set (G_OBJECT (stream->udpsink[1]), "auto-multicast", FALSE,
"loop", FALSE, "sync", FALSE, "async", FALSE, NULL);
if (ttl > 0)
g_object_set (G_OBJECT (stream->udpsink[0]), "ttl", ttl, NULL);
if (stream->udpsrc[1]) {
/* configure socket, we give it the same UDP socket as the udpsrc for RTCP
* because some servers check the port number of where it sends RTCP to identify
* the RTCP packets it receives */
g_object_get (G_OBJECT (stream->udpsrc[1]), "used-socket", &socket, NULL);
GST_DEBUG_OBJECT (src, "RTCP UDP src has sock %p", socket);
/* configure socket and make sure udpsink does not close it when shutting
* down, it belongs to udpsrc after all. */
g_object_set (G_OBJECT (stream->udpsink[1]), "socket", socket,
"close-socket", FALSE, NULL);
g_object_unref (socket);
}
/* we don't want to consider this a sink */
GST_OBJECT_FLAG_UNSET (stream->udpsink[1], GST_ELEMENT_FLAG_SINK);
/* we keep this playing always */
gst_element_set_locked_state (stream->udpsink[1], TRUE);
gst_element_set_state (stream->udpsink[1], GST_STATE_PLAYING);
gst_object_ref (stream->udpsink[1]);
gst_bin_add (GST_BIN_CAST (src), stream->udpsink[1]);
stream->rtcppad = gst_element_get_static_pad (stream->udpsink[1], "sink");
/* get session RTCP pad */
name = g_strdup_printf ("send_rtcp_src_%u", stream->id);
pad = gst_element_get_request_pad (src->manager, name);
g_free (name);
/* and link */
if (pad) {
gst_pad_link_full (pad, stream->rtcppad, GST_PAD_LINK_CHECK_NOTHING);
gst_object_unref (pad);
}
}
return TRUE;
/* ERRORS */
no_destination:
{
GST_DEBUG_OBJECT (src, "no destination address specified");
return FALSE;
}
no_sink_element:
{
GST_DEBUG_OBJECT (src, "no UDP sink element found");
return FALSE;
}
no_fakesrc_element:
{
GST_DEBUG_OBJECT (src, "no fakesrc element found");
return FALSE;
}
}
/* sets up all elements needed for streaming over the specified transport.
* Does not yet expose the element pads, this will be done when there is actuall
* dataflow detected, which might never happen when UDP is blocked in a
* firewall, for example.
*/
static gboolean
gst_rtspsrc_stream_configure_transport (GstRTSPStream * stream,
GstRTSPTransport * transport)
{
GstRTSPSrc *src;
GstPad *outpad = NULL;
GstPadTemplate *template;
gchar *name;
const gchar *media_type;
guint i, len;
src = stream->parent;
GST_DEBUG_OBJECT (src, "configuring transport for stream %p", stream);
/* get the proper media type for this stream now */
if (gst_rtsp_transport_get_media_type (transport, &media_type) < 0)
goto unknown_transport;
if (!media_type)
goto unknown_transport;
/* configure the final media type */
GST_DEBUG_OBJECT (src, "setting media type to %s", media_type);
len = stream->ptmap->len;
for (i = 0; i < len; i++) {
GstStructure *s;
PtMapItem *item = &g_array_index (stream->ptmap, PtMapItem, i);
if (item->caps == NULL)
continue;
s = gst_caps_get_structure (item->caps, 0);
gst_structure_set_name (s, media_type);
/* set ssrc if known */
if (transport->ssrc)
gst_structure_set (s, "ssrc", G_TYPE_UINT, transport->ssrc, NULL);
}
/* try to get and configure a manager, channelpad[0-1] will be configured with
* the pads for the manager, or NULL when no manager is needed. */
if (!gst_rtspsrc_stream_configure_manager (src, stream, transport))
goto no_manager;
switch (transport->lower_transport) {
case GST_RTSP_LOWER_TRANS_TCP:
if (!gst_rtspsrc_stream_configure_tcp (src, stream, transport, &outpad))
goto transport_failed;
break;
case GST_RTSP_LOWER_TRANS_UDP_MCAST:
if (!gst_rtspsrc_stream_configure_mcast (src, stream, transport, &outpad))
goto transport_failed;
/* fallthrough, the rest is the same for UDP and MCAST */
case GST_RTSP_LOWER_TRANS_UDP:
if (!gst_rtspsrc_stream_configure_udp (src, stream, transport, &outpad))
goto transport_failed;
/* configure udpsinks back to the server for RTCP messages and for the
* dummy RTP messages to open NAT. */
if (!gst_rtspsrc_stream_configure_udp_sinks (src, stream, transport))
goto transport_failed;
break;
default:
goto unknown_transport;
}
if (outpad) {
GST_DEBUG_OBJECT (src, "creating ghostpad");
gst_pad_use_fixed_caps (outpad);
/* create ghostpad, don't add just yet, this will be done when we activate
* the stream. */
name = g_strdup_printf ("stream_%u", stream->id);
template = gst_static_pad_template_get (&rtptemplate);
stream->srcpad = gst_ghost_pad_new_from_template (name, outpad, template);
gst_pad_set_event_function (stream->srcpad, gst_rtspsrc_handle_src_event);
gst_pad_set_query_function (stream->srcpad, gst_rtspsrc_handle_src_query);
gst_object_unref (template);
g_free (name);
gst_object_unref (outpad);
}
/* mark pad as ok */
stream->last_ret = GST_FLOW_OK;
return TRUE;
/* ERRORS */
transport_failed:
{
GST_DEBUG_OBJECT (src, "failed to configure transport");
return FALSE;
}
unknown_transport:
{
GST_DEBUG_OBJECT (src, "unknown transport");
return FALSE;
}
no_manager:
{
GST_DEBUG_OBJECT (src, "cannot get a session manager");
return FALSE;
}
}
/* send a couple of dummy random packets on the receiver RTP port to the server,
* this should make a firewall think we initiated the data transfer and
* hopefully allow packets to go from the sender port to our RTP receiver port */
static gboolean
gst_rtspsrc_send_dummy_packets (GstRTSPSrc * src)
{
GList *walk;
if (src->nat_method != GST_RTSP_NAT_DUMMY)
return TRUE;
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
if (stream->fakesrc && stream->udpsink[0]) {
GST_DEBUG_OBJECT (src, "sending dummy packet to stream %p", stream);
gst_element_set_state (stream->udpsink[0], GST_STATE_NULL);
gst_element_set_state (stream->fakesrc, GST_STATE_NULL);
gst_element_set_state (stream->udpsink[0], GST_STATE_PLAYING);
gst_element_set_state (stream->fakesrc, GST_STATE_PLAYING);
}
}
return TRUE;
}
/* Adds the source pads of all configured streams to the element.
* This code is performed when we detected dataflow.
*
* We detect dataflow from either the _loop function or with pad probes on the
* udp sources.
*/
static gboolean
gst_rtspsrc_activate_streams (GstRTSPSrc * src)
{
GList *walk;
GST_DEBUG_OBJECT (src, "activating streams");
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
if (stream->udpsrc[0]) {
/* remove timeout, we are streaming now and timeouts will be handled by
* the session manager and jitter buffer */
g_object_set (G_OBJECT (stream->udpsrc[0]), "timeout", (guint64) 0, NULL);
}
if (stream->srcpad) {
GST_DEBUG_OBJECT (src, "activating stream pad %p", stream);
gst_pad_set_active (stream->srcpad, TRUE);
/* if we don't have a session manager, set the caps now. If we have a
* session, we will get a notification of the pad and the caps. */
if (!src->manager) {
GstCaps *caps;
caps = stream_get_caps_for_pt (stream, stream->default_pt);
GST_DEBUG_OBJECT (src, "setting pad caps for stream %p", stream);
gst_pad_set_caps (stream->srcpad, caps);
}
/* add the pad */
if (!stream->added) {
GST_DEBUG_OBJECT (src, "adding stream pad %p", stream);
gst_element_add_pad (GST_ELEMENT_CAST (src), stream->srcpad);
stream->added = TRUE;
}
}
}
/* unblock all pads */
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
if (stream->blockid) {
GST_DEBUG_OBJECT (src, "unblocking stream pad %p", stream);
gst_pad_remove_probe (stream->blockedpad, stream->blockid);
stream->blockid = 0;
}
}
return TRUE;
}
static void
gst_rtspsrc_configure_caps (GstRTSPSrc * src, GstSegment * segment,
gboolean reset_manager)
{
GList *walk;
guint64 start, stop;
gdouble play_speed, play_scale;
GST_DEBUG_OBJECT (src, "configuring stream caps");
start = segment->position;
stop = segment->duration;
play_speed = segment->rate;
play_scale = segment->applied_rate;
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
guint j, len;
if (!stream->setup)
continue;
len = stream->ptmap->len;
for (j = 0; j < len; j++) {
GstCaps *caps;
PtMapItem *item = &g_array_index (stream->ptmap, PtMapItem, j);
if (item->caps == NULL)
continue;
caps = gst_caps_make_writable (item->caps);
/* update caps */
if (stream->timebase != -1)
gst_caps_set_simple (caps, "clock-base", G_TYPE_UINT,
(guint) stream->timebase, NULL);
if (stream->seqbase != -1)
gst_caps_set_simple (caps, "seqnum-base", G_TYPE_UINT,
(guint) stream->seqbase, NULL);
gst_caps_set_simple (caps, "npt-start", G_TYPE_UINT64, start, NULL);
if (stop != -1)
gst_caps_set_simple (caps, "npt-stop", G_TYPE_UINT64, stop, NULL);
gst_caps_set_simple (caps, "play-speed", G_TYPE_DOUBLE, play_speed, NULL);
gst_caps_set_simple (caps, "play-scale", G_TYPE_DOUBLE, play_scale, NULL);
item->caps = caps;
GST_DEBUG_OBJECT (src, "stream %p, pt %d, caps %" GST_PTR_FORMAT, stream,
item->pt, caps);
if (item->pt == stream->default_pt && stream->udpsrc[0]) {
g_object_set (stream->udpsrc[0], "caps", caps, NULL);
}
}
}
if (reset_manager && src->manager) {
GST_DEBUG_OBJECT (src, "clear session");
g_signal_emit_by_name (src->manager, "clear-pt-map", NULL);
}
}
static GstFlowReturn
gst_rtspsrc_combine_flows (GstRTSPSrc * src, GstRTSPStream * stream,
GstFlowReturn ret)
{
GList *streams;
/* store the value */
stream->last_ret = ret;
/* if it's success we can return the value right away */
if (ret == GST_FLOW_OK)
goto done;
/* any other error that is not-linked can be returned right
* away */
if (ret != GST_FLOW_NOT_LINKED)
goto done;
/* only return NOT_LINKED if all other pads returned NOT_LINKED */
for (streams = src->streams; streams; streams = g_list_next (streams)) {
GstRTSPStream *ostream = (GstRTSPStream *) streams->data;
ret = ostream->last_ret;
/* some other return value (must be SUCCESS but we can return
* other values as well) */
if (ret != GST_FLOW_NOT_LINKED)
goto done;
}
/* if we get here, all other pads were unlinked and we return
* NOT_LINKED then */
done:
return ret;
}
static gboolean
gst_rtspsrc_stream_push_event (GstRTSPSrc * src, GstRTSPStream * stream,
GstEvent * event)
{
gboolean res = TRUE;
/* only streams that have a connection to the outside world */
if (!stream->setup)
goto done;
if (stream->udpsrc[0]) {
gst_event_ref (event);
res = gst_element_send_event (stream->udpsrc[0], event);
} else if (stream->channelpad[0]) {
gst_event_ref (event);
if (GST_PAD_IS_SRC (stream->channelpad[0]))
res = gst_pad_push_event (stream->channelpad[0], event);
else
res = gst_pad_send_event (stream->channelpad[0], event);
}
if (stream->udpsrc[1]) {
gst_event_ref (event);
res &= gst_element_send_event (stream->udpsrc[1], event);
} else if (stream->channelpad[1]) {
gst_event_ref (event);
if (GST_PAD_IS_SRC (stream->channelpad[1]))
res &= gst_pad_push_event (stream->channelpad[1], event);
else
res &= gst_pad_send_event (stream->channelpad[1], event);
}
done:
gst_event_unref (event);
return res;
}
static gboolean
gst_rtspsrc_push_event (GstRTSPSrc * src, GstEvent * event)
{
GList *streams;
gboolean res = TRUE;
for (streams = src->streams; streams; streams = g_list_next (streams)) {
GstRTSPStream *ostream = (GstRTSPStream *) streams->data;
gst_event_ref (event);
res &= gst_rtspsrc_stream_push_event (src, ostream, event);
}
gst_event_unref (event);
return res;
}
static GstRTSPResult
gst_rtsp_conninfo_connect (GstRTSPSrc * src, GstRTSPConnInfo * info,
gboolean async)
{
GstRTSPResult res;
if (info->connection == NULL) {
if (info->url == NULL) {
GST_DEBUG_OBJECT (src, "parsing uri (%s)...", info->location);
if ((res = gst_rtsp_url_parse (info->location, &info->url)) < 0)
goto parse_error;
}
/* create connection */
GST_DEBUG_OBJECT (src, "creating connection (%s)...", info->location);
if ((res = gst_rtsp_connection_create (info->url, &info->connection)) < 0)
goto could_not_create;
if (info->url_str)
g_free (info->url_str);
info->url_str = gst_rtsp_url_get_request_uri (info->url);
GST_DEBUG_OBJECT (src, "sanitized uri %s", info->url_str);
if (info->url->transports & GST_RTSP_LOWER_TRANS_TLS) {
if (!gst_rtsp_connection_set_tls_validation_flags (info->connection,
src->tls_validation_flags))
GST_WARNING_OBJECT (src, "Unable to set TLS validation flags");
if (src->tls_database)
gst_rtsp_connection_set_tls_database (info->connection,
src->tls_database);
}
if (info->url->transports & GST_RTSP_LOWER_TRANS_HTTP)
gst_rtsp_connection_set_tunneled (info->connection, TRUE);
if (src->proxy_host) {
GST_DEBUG_OBJECT (src, "setting proxy %s:%d", src->proxy_host,
src->proxy_port);
gst_rtsp_connection_set_proxy (info->connection, src->proxy_host,
src->proxy_port);
}
}
if (!info->connected) {
/* connect */
if (async)
GST_ELEMENT_PROGRESS (src, CONTINUE, "connect",
("Connecting to %s", info->location));
GST_DEBUG_OBJECT (src, "connecting (%s)...", info->location);
if ((res =
gst_rtsp_connection_connect (info->connection,
src->ptcp_timeout)) < 0)
goto could_not_connect;
info->connected = TRUE;
}
return GST_RTSP_OK;
/* ERRORS */
parse_error:
{
GST_ERROR_OBJECT (src, "No valid RTSP URL was provided");
return res;
}
could_not_create:
{
gchar *str = gst_rtsp_strresult (res);
GST_ERROR_OBJECT (src, "Could not create connection. (%s)", str);
g_free (str);
return res;
}
could_not_connect:
{
gchar *str = gst_rtsp_strresult (res);
GST_ERROR_OBJECT (src, "Could not connect to server. (%s)", str);
g_free (str);
return res;
}
}
static GstRTSPResult
gst_rtsp_conninfo_close (GstRTSPSrc * src, GstRTSPConnInfo * info,
gboolean free)
{
GST_RTSP_STATE_LOCK (src);
if (info->connected) {
GST_DEBUG_OBJECT (src, "closing connection...");
gst_rtsp_connection_close (info->connection);
info->connected = FALSE;
}
if (free && info->connection) {
/* free connection */
GST_DEBUG_OBJECT (src, "freeing connection...");
gst_rtsp_connection_free (info->connection);
info->connection = NULL;
}
GST_RTSP_STATE_UNLOCK (src);
return GST_RTSP_OK;
}
static GstRTSPResult
gst_rtsp_conninfo_reconnect (GstRTSPSrc * src, GstRTSPConnInfo * info,
gboolean async)
{
GstRTSPResult res;
GST_DEBUG_OBJECT (src, "reconnecting connection...");
gst_rtsp_conninfo_close (src, info, FALSE);
res = gst_rtsp_conninfo_connect (src, info, async);
return res;
}
static void
gst_rtspsrc_connection_flush (GstRTSPSrc * src, gboolean flush)
{
GList *walk;
GST_DEBUG_OBJECT (src, "set flushing %d", flush);
GST_RTSP_STATE_LOCK (src);
if (src->conninfo.connection && src->conninfo.flushing != flush) {
GST_DEBUG_OBJECT (src, "connection flush");
gst_rtsp_connection_flush (src->conninfo.connection, flush);
src->conninfo.flushing = flush;
}
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
if (stream->conninfo.connection && stream->conninfo.flushing != flush) {
GST_DEBUG_OBJECT (src, "stream %p flush", stream);
gst_rtsp_connection_flush (stream->conninfo.connection, flush);
stream->conninfo.flushing = flush;
}
}
GST_RTSP_STATE_UNLOCK (src);
}
/* FIXME, handle server request, reply with OK, for now */
static GstRTSPResult
gst_rtspsrc_handle_request (GstRTSPSrc * src, GstRTSPConnection * conn,
GstRTSPMessage * request)
{
GstRTSPMessage response = { 0 };
GstRTSPResult res;
GST_DEBUG_OBJECT (src, "got server request message");
if (src->debug)
gst_rtsp_message_dump (request);
res = gst_rtsp_ext_list_receive_request (src->extensions, request);
if (res == GST_RTSP_ENOTIMPL) {
/* default implementation, send OK */
GST_DEBUG_OBJECT (src, "prepare OK reply");
res =
gst_rtsp_message_init_response (&response, GST_RTSP_STS_OK, "OK",
request);
if (res < 0)
goto send_error;
/* let app parse and reply */
g_signal_emit (src, gst_rtspsrc_signals[SIGNAL_HANDLE_REQUEST],
0, request, &response);
if (src->debug)
gst_rtsp_message_dump (&response);
res = gst_rtspsrc_connection_send (src, conn, &response, NULL);
if (res < 0)
goto send_error;
gst_rtsp_message_unset (&response);
} else if (res == GST_RTSP_EEOF)
return res;
return GST_RTSP_OK;
/* ERRORS */
send_error:
{
gst_rtsp_message_unset (&response);
return res;
}
}
/* send server keep-alive */
static GstRTSPResult
gst_rtspsrc_send_keep_alive (GstRTSPSrc * src)
{
GstRTSPMessage request = { 0 };
GstRTSPResult res;
GstRTSPMethod method;
const gchar *control;
if (src->do_rtsp_keep_alive == FALSE) {
GST_DEBUG_OBJECT (src, "do-rtsp-keep-alive is FALSE, not sending.");
gst_rtsp_connection_reset_timeout (src->conninfo.connection);
return GST_RTSP_OK;
}
GST_DEBUG_OBJECT (src, "creating server keep-alive");
/* find a method to use for keep-alive */
if (src->methods & GST_RTSP_GET_PARAMETER)
method = GST_RTSP_GET_PARAMETER;
else
method = GST_RTSP_OPTIONS;
control = get_aggregate_control (src);
if (control == NULL)
goto no_control;
res = gst_rtsp_message_init_request (&request, method, control);
if (res < 0)
goto send_error;
if (src->debug)
gst_rtsp_message_dump (&request);
res =
gst_rtspsrc_connection_send (src, src->conninfo.connection, &request,
NULL);
if (res < 0)
goto send_error;
gst_rtsp_connection_reset_timeout (src->conninfo.connection);
gst_rtsp_message_unset (&request);
return GST_RTSP_OK;
/* ERRORS */
no_control:
{
GST_WARNING_OBJECT (src, "no control url to send keepalive");
return GST_RTSP_OK;
}
send_error:
{
gchar *str = gst_rtsp_strresult (res);
gst_rtsp_message_unset (&request);
GST_ELEMENT_WARNING (src, RESOURCE, WRITE, (NULL),
("Could not send keep-alive. (%s)", str));
g_free (str);
return res;
}
}
static GstFlowReturn
gst_rtspsrc_handle_data (GstRTSPSrc * src, GstRTSPMessage * message)
{
GstFlowReturn ret = GST_FLOW_OK;
gint channel;
GstRTSPStream *stream;
GstPad *outpad = NULL;
guint8 *data;
guint size;
GstBuffer *buf;
gboolean is_rtcp;
channel = message->type_data.data.channel;
stream = find_stream (src, &channel, (gpointer) find_stream_by_channel);
if (!stream)
goto unknown_stream;
if (channel == stream->channel[0]) {
outpad = stream->channelpad[0];
is_rtcp = FALSE;
} else if (channel == stream->channel[1]) {
outpad = stream->channelpad[1];
is_rtcp = TRUE;
} else {
is_rtcp = FALSE;
}
/* take a look at the body to figure out what we have */
gst_rtsp_message_get_body (message, &data, &size);
if (size < 2)
goto invalid_length;
/* channels are not correct on some servers, do extra check */
if (data[1] >= 200 && data[1] <= 204) {
/* hmm RTCP message switch to the RTCP pad of the same stream. */
outpad = stream->channelpad[1];
is_rtcp = TRUE;
}
/* we have no clue what this is, just ignore then. */
if (outpad == NULL)
goto unknown_stream;
/* take the message body for further processing */
gst_rtsp_message_steal_body (message, &data, &size);
/* strip the trailing \0 */
size -= 1;
buf = gst_buffer_new ();
gst_buffer_append_memory (buf,
gst_memory_new_wrapped (0, data, size, 0, size, data, g_free));
/* don't need message anymore */
gst_rtsp_message_unset (message);
GST_DEBUG_OBJECT (src, "pushing data of size %d on channel %d", size,
channel);
if (src->need_activate) {
gchar *stream_id;
GstEvent *event;
GChecksum *cs;
gchar *uri;
GList *streams;
guint group_id = gst_util_group_id_next ();
/* generate an SHA256 sum of the URI */
cs = g_checksum_new (G_CHECKSUM_SHA256);
uri = src->conninfo.location;
g_checksum_update (cs, (const guchar *) uri, strlen (uri));
for (streams = src->streams; streams; streams = g_list_next (streams)) {
GstRTSPStream *ostream = (GstRTSPStream *) streams->data;
GstCaps *caps;
stream_id =
g_strdup_printf ("%s/%d", g_checksum_get_string (cs), ostream->id);
event = gst_event_new_stream_start (stream_id);
gst_event_set_group_id (event, group_id);
g_free (stream_id);
gst_rtspsrc_stream_push_event (src, ostream, event);
if ((caps = stream_get_caps_for_pt (ostream, ostream->default_pt))) {
/* only streams that have a connection to the outside world */
if (ostream->setup) {
if (ostream->udpsrc[0]) {
gst_element_send_event (ostream->udpsrc[0],
gst_event_new_caps (caps));
} else if (ostream->channelpad[0]) {
if (GST_PAD_IS_SRC (ostream->channelpad[0]))
gst_pad_push_event (ostream->channelpad[0],
gst_event_new_caps (caps));
else
gst_pad_send_event (ostream->channelpad[0],
gst_event_new_caps (caps));
}
caps = gst_caps_new_empty_simple ("application/x-rtcp");
if (ostream->udpsrc[1]) {
gst_element_send_event (ostream->udpsrc[1],
gst_event_new_caps (caps));
} else if (ostream->channelpad[1]) {
if (GST_PAD_IS_SRC (ostream->channelpad[1]))
gst_pad_push_event (ostream->channelpad[1],
gst_event_new_caps (caps));
else
gst_pad_send_event (ostream->channelpad[1],
gst_event_new_caps (caps));
}
gst_caps_unref (caps);
}
}
}
g_checksum_free (cs);
gst_rtspsrc_activate_streams (src);
src->need_activate = FALSE;
src->need_segment = TRUE;
}
if (src->base_time == -1) {
/* Take current running_time. This timestamp will be put on
* the first buffer of each stream because we are a live source and so we
* timestamp with the running_time. When we are dealing with TCP, we also
* only timestamp the first buffer (using the DISCONT flag) because a server
* typically bursts data, for which we don't want to compensate by speeding
* up the media. The other timestamps will be interpollated from this one
* using the RTP timestamps. */
GST_OBJECT_LOCK (src);
if (GST_ELEMENT_CLOCK (src)) {
GstClockTime now;
GstClockTime base_time;
now = gst_clock_get_time (GST_ELEMENT_CLOCK (src));
base_time = GST_ELEMENT_CAST (src)->base_time;
src->base_time = now - base_time;
GST_DEBUG_OBJECT (src, "first buffer at time %" GST_TIME_FORMAT ", base %"
GST_TIME_FORMAT, GST_TIME_ARGS (now), GST_TIME_ARGS (base_time));
}
GST_OBJECT_UNLOCK (src);
}
/* If needed send a new segment, don't forget we are live and buffer are
* timestamped with running time */
if (src->need_segment) {
GstSegment segment;
src->need_segment = FALSE;
gst_segment_init (&segment, GST_FORMAT_TIME);
gst_rtspsrc_push_event (src, gst_event_new_segment (&segment));
}
if (stream->discont && !is_rtcp) {
/* mark first RTP buffer as discont */
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_DISCONT);
stream->discont = FALSE;
/* first buffer gets the timestamp, other buffers are not timestamped and
* their presentation time will be interpollated from the rtp timestamps. */
GST_DEBUG_OBJECT (src, "setting timestamp %" GST_TIME_FORMAT,
GST_TIME_ARGS (src->base_time));
GST_BUFFER_TIMESTAMP (buf) = src->base_time;
}
/* chain to the peer pad */
if (GST_PAD_IS_SINK (outpad))
ret = gst_pad_chain (outpad, buf);
else
ret = gst_pad_push (outpad, buf);
if (!is_rtcp) {
/* combine all stream flows for the data transport */
ret = gst_rtspsrc_combine_flows (src, stream, ret);
}
return ret;
/* ERRORS */
unknown_stream:
{
GST_DEBUG_OBJECT (src, "unknown stream on channel %d, ignored", channel);
gst_rtsp_message_unset (message);
return GST_FLOW_OK;
}
invalid_length:
{
GST_ELEMENT_WARNING (src, RESOURCE, READ, (NULL),
("Short message received, ignoring."));
gst_rtsp_message_unset (message);
return GST_FLOW_OK;
}
}
static GstFlowReturn
gst_rtspsrc_loop_interleaved (GstRTSPSrc * src)
{
GstRTSPMessage message = { 0 };
GstRTSPResult res;
GstFlowReturn ret = GST_FLOW_OK;
GTimeVal tv_timeout;
while (TRUE) {
/* get the next timeout interval */
gst_rtsp_connection_next_timeout (src->conninfo.connection, &tv_timeout);
/* see if the timeout period expired */
if ((tv_timeout.tv_sec | tv_timeout.tv_usec) == 0) {
GST_DEBUG_OBJECT (src, "timout, sending keep-alive");
/* send keep-alive, only act on interrupt, a warning will be posted for
* other errors. */
if ((res = gst_rtspsrc_send_keep_alive (src)) == GST_RTSP_EINTR)
goto interrupt;
/* get new timeout */
gst_rtsp_connection_next_timeout (src->conninfo.connection, &tv_timeout);
}
GST_DEBUG_OBJECT (src, "doing receive with timeout %ld seconds, %ld usec",
tv_timeout.tv_sec, tv_timeout.tv_usec);
/* protect the connection with the connection lock so that we can see when
* we are finished doing server communication */
res =
gst_rtspsrc_connection_receive (src, src->conninfo.connection,
&message, src->ptcp_timeout);
switch (res) {
case GST_RTSP_OK:
GST_DEBUG_OBJECT (src, "we received a server message");
break;
case GST_RTSP_EINTR:
/* we got interrupted this means we need to stop */
goto interrupt;
case GST_RTSP_ETIMEOUT:
/* no reply, send keep alive */
GST_DEBUG_OBJECT (src, "timeout, sending keep-alive");
if ((res = gst_rtspsrc_send_keep_alive (src)) == GST_RTSP_EINTR)
goto interrupt;
continue;
case GST_RTSP_EEOF:
/* go EOS when the server closed the connection */
goto server_eof;
default:
goto receive_error;
}
switch (message.type) {
case GST_RTSP_MESSAGE_REQUEST:
/* server sends us a request message, handle it */
res =
gst_rtspsrc_handle_request (src, src->conninfo.connection,
&message);
if (res == GST_RTSP_EEOF)
goto server_eof;
else if (res < 0)
goto handle_request_failed;
break;
case GST_RTSP_MESSAGE_RESPONSE:
/* we ignore response messages */
GST_DEBUG_OBJECT (src, "ignoring response message");
if (src->debug)
gst_rtsp_message_dump (&message);
break;
case GST_RTSP_MESSAGE_DATA:
GST_DEBUG_OBJECT (src, "got data message");
ret = gst_rtspsrc_handle_data (src, &message);
if (ret != GST_FLOW_OK)
goto handle_data_failed;
break;
default:
GST_WARNING_OBJECT (src, "ignoring unknown message type %d",
message.type);
break;
}
}
g_assert_not_reached ();
/* ERRORS */
server_eof:
{
GST_DEBUG_OBJECT (src, "we got an eof from the server");
GST_ELEMENT_WARNING (src, RESOURCE, READ, (NULL),
("The server closed the connection."));
src->conninfo.connected = FALSE;
gst_rtsp_message_unset (&message);
return GST_FLOW_EOS;
}
interrupt:
{
gst_rtsp_message_unset (&message);
GST_DEBUG_OBJECT (src, "got interrupted");
return GST_FLOW_FLUSHING;
}
receive_error:
{
gchar *str = gst_rtsp_strresult (res);
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not receive message. (%s)", str));
g_free (str);
gst_rtsp_message_unset (&message);
return GST_FLOW_ERROR;
}
handle_request_failed:
{
gchar *str = gst_rtsp_strresult (res);
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not handle server message. (%s)", str));
g_free (str);
gst_rtsp_message_unset (&message);
return GST_FLOW_ERROR;
}
handle_data_failed:
{
GST_DEBUG_OBJECT (src, "could no handle data message");
return ret;
}
}
static GstFlowReturn
gst_rtspsrc_loop_udp (GstRTSPSrc * src)
{
GstRTSPResult res;
GstRTSPMessage message = { 0 };
gint retry = 0;
while (TRUE) {
GTimeVal tv_timeout;
/* get the next timeout interval */
gst_rtsp_connection_next_timeout (src->conninfo.connection, &tv_timeout);
GST_DEBUG_OBJECT (src, "doing receive with timeout %d seconds",
(gint) tv_timeout.tv_sec);
gst_rtsp_message_unset (&message);
/* we should continue reading the TCP socket because the server might
* send us requests. When the session timeout expires, we need to send a
* keep-alive request to keep the session open. */
res = gst_rtspsrc_connection_receive (src, src->conninfo.connection,
&message, &tv_timeout);
switch (res) {
case GST_RTSP_OK:
GST_DEBUG_OBJECT (src, "we received a server message");
break;
case GST_RTSP_EINTR:
/* we got interrupted, see what we have to do */
goto interrupt;
case GST_RTSP_ETIMEOUT:
/* send keep-alive, ignore the result, a warning will be posted. */
GST_DEBUG_OBJECT (src, "timeout, sending keep-alive");
if ((res = gst_rtspsrc_send_keep_alive (src)) == GST_RTSP_EINTR)
goto interrupt;
continue;
case GST_RTSP_EEOF:
/* server closed the connection. not very fatal for UDP, reconnect and
* see what happens. */
GST_ELEMENT_WARNING (src, RESOURCE, READ, (NULL),
("The server closed the connection."));
if (src->udp_reconnect) {
if ((res =
gst_rtsp_conninfo_reconnect (src, &src->conninfo, FALSE)) < 0)
goto connect_error;
} else {
goto server_eof;
}
continue;
case GST_RTSP_ENET:
GST_DEBUG_OBJECT (src, "An ethernet problem occured.");
default:
GST_ELEMENT_WARNING (src, RESOURCE, READ, (NULL),
("Unhandled return value %d.", res));
goto receive_error;
}
switch (message.type) {
case GST_RTSP_MESSAGE_REQUEST:
/* server sends us a request message, handle it */
res =
gst_rtspsrc_handle_request (src, src->conninfo.connection,
&message);
if (res == GST_RTSP_EEOF)
goto server_eof;
else if (res < 0)
goto handle_request_failed;
break;
case GST_RTSP_MESSAGE_RESPONSE:
/* we ignore response and data messages */
GST_DEBUG_OBJECT (src, "ignoring response message");
if (src->debug)
gst_rtsp_message_dump (&message);
if (message.type_data.response.code == GST_RTSP_STS_UNAUTHORIZED) {
GST_DEBUG_OBJECT (src, "but is Unauthorized response ...");
if (gst_rtspsrc_setup_auth (src, &message) && !(retry++)) {
GST_DEBUG_OBJECT (src, "so retrying keep-alive");
if ((res = gst_rtspsrc_send_keep_alive (src)) == GST_RTSP_EINTR)
goto interrupt;
}
} else {
retry = 0;
}
break;
case GST_RTSP_MESSAGE_DATA:
/* we ignore response and data messages */
GST_DEBUG_OBJECT (src, "ignoring data message");
break;
default:
GST_WARNING_OBJECT (src, "ignoring unknown message type %d",
message.type);
break;
}
}
g_assert_not_reached ();
/* we get here when the connection got interrupted */
interrupt:
{
gst_rtsp_message_unset (&message);
GST_DEBUG_OBJECT (src, "got interrupted");
return GST_FLOW_FLUSHING;
}
connect_error:
{
gchar *str = gst_rtsp_strresult (res);
GstFlowReturn ret;
src->conninfo.connected = FALSE;
if (res != GST_RTSP_EINTR) {
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
("Could not connect to server. (%s)", str));
g_free (str);
ret = GST_FLOW_ERROR;
} else {
ret = GST_FLOW_FLUSHING;
}
return ret;
}
receive_error:
{
gchar *str = gst_rtsp_strresult (res);
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not receive message. (%s)", str));
g_free (str);
return GST_FLOW_ERROR;
}
handle_request_failed:
{
gchar *str = gst_rtsp_strresult (res);
GstFlowReturn ret;
gst_rtsp_message_unset (&message);
if (res != GST_RTSP_EINTR) {
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not handle server message. (%s)", str));
g_free (str);
ret = GST_FLOW_ERROR;
} else {
ret = GST_FLOW_FLUSHING;
}
return ret;
}
server_eof:
{
GST_DEBUG_OBJECT (src, "we got an eof from the server");
GST_ELEMENT_WARNING (src, RESOURCE, READ, (NULL),
("The server closed the connection."));
src->conninfo.connected = FALSE;
gst_rtsp_message_unset (&message);
return GST_FLOW_EOS;
}
}
static GstRTSPResult
gst_rtspsrc_reconnect (GstRTSPSrc * src, gboolean async)
{
GstRTSPResult res = GST_RTSP_OK;
gboolean restart;
GST_DEBUG_OBJECT (src, "doing reconnect");
GST_OBJECT_LOCK (src);
/* only restart when the pads were not yet activated, else we were
* streaming over UDP */
restart = src->need_activate;
GST_OBJECT_UNLOCK (src);
/* no need to restart, we're done */
if (!restart)
goto done;
/* we can try only TCP now */
src->cur_protocols = GST_RTSP_LOWER_TRANS_TCP;
/* close and cleanup our state */
if ((res = gst_rtspsrc_close (src, async, FALSE)) < 0)
goto done;
/* see if we have TCP left to try. Also don't try TCP when we were configured
* with an SDP. */
if (!(src->protocols & GST_RTSP_LOWER_TRANS_TCP) || src->from_sdp)
goto no_protocols;
/* We post a warning message now to inform the user
* that nothing happened. It's most likely a firewall thing. */
GST_ELEMENT_WARNING (src, RESOURCE, READ, (NULL),
("Could not receive any UDP packets for %.4f seconds, maybe your "
"firewall is blocking it. Retrying using a TCP connection.",
gst_guint64_to_gdouble (src->udp_timeout / 1000000.0)));
/* open new connection using tcp */
if (gst_rtspsrc_open (src, async) < 0)
goto open_failed;
/* start playback */
if (gst_rtspsrc_play (src, &src->segment, async) < 0)
goto play_failed;
done:
return res;
/* ERRORS */
no_protocols:
{
src->cur_protocols = 0;
/* no transport possible, post an error and stop */
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not receive any UDP packets for %.4f seconds, maybe your "
"firewall is blocking it. No other protocols to try.",
gst_guint64_to_gdouble (src->udp_timeout / 1000000.0)));
return GST_RTSP_ERROR;
}
open_failed:
{
GST_DEBUG_OBJECT (src, "open failed");
return GST_RTSP_OK;
}
play_failed:
{
GST_DEBUG_OBJECT (src, "play failed");
return GST_RTSP_OK;
}
}
static void
gst_rtspsrc_loop_start_cmd (GstRTSPSrc * src, gint cmd)
{
switch (cmd) {
case CMD_OPEN:
GST_ELEMENT_PROGRESS (src, START, "open", ("Opening Stream"));
break;
case CMD_PLAY:
GST_ELEMENT_PROGRESS (src, START, "request", ("Sending PLAY request"));
break;
case CMD_PAUSE:
GST_ELEMENT_PROGRESS (src, START, "request", ("Sending PAUSE request"));
break;
case CMD_CLOSE:
GST_ELEMENT_PROGRESS (src, START, "close", ("Closing Stream"));
break;
default:
break;
}
}
static void
gst_rtspsrc_loop_complete_cmd (GstRTSPSrc * src, gint cmd)
{
switch (cmd) {
case CMD_OPEN:
GST_ELEMENT_PROGRESS (src, COMPLETE, "open", ("Opened Stream"));
break;
case CMD_PLAY:
GST_ELEMENT_PROGRESS (src, COMPLETE, "request", ("Sent PLAY request"));
break;
case CMD_PAUSE:
GST_ELEMENT_PROGRESS (src, COMPLETE, "request", ("Sent PAUSE request"));
break;
case CMD_CLOSE:
GST_ELEMENT_PROGRESS (src, COMPLETE, "close", ("Closed Stream"));
break;
default:
break;
}
}
static void
gst_rtspsrc_loop_cancel_cmd (GstRTSPSrc * src, gint cmd)
{
switch (cmd) {
case CMD_OPEN:
GST_ELEMENT_PROGRESS (src, CANCELED, "open", ("Open canceled"));
break;
case CMD_PLAY:
GST_ELEMENT_PROGRESS (src, CANCELED, "request", ("PLAY canceled"));
break;
case CMD_PAUSE:
GST_ELEMENT_PROGRESS (src, CANCELED, "request", ("PAUSE canceled"));
break;
case CMD_CLOSE:
GST_ELEMENT_PROGRESS (src, CANCELED, "close", ("Close canceled"));
break;
default:
break;
}
}
static void
gst_rtspsrc_loop_error_cmd (GstRTSPSrc * src, gint cmd)
{
switch (cmd) {
case CMD_OPEN:
GST_ELEMENT_PROGRESS (src, ERROR, "open", ("Open failed"));
break;
case CMD_PLAY:
GST_ELEMENT_PROGRESS (src, ERROR, "request", ("PLAY failed"));
break;
case CMD_PAUSE:
GST_ELEMENT_PROGRESS (src, ERROR, "request", ("PAUSE failed"));
break;
case CMD_CLOSE:
GST_ELEMENT_PROGRESS (src, ERROR, "close", ("Close failed"));
break;
default:
break;
}
}
static void
gst_rtspsrc_loop_end_cmd (GstRTSPSrc * src, gint cmd, GstRTSPResult ret)
{
if (ret == GST_RTSP_OK)
gst_rtspsrc_loop_complete_cmd (src, cmd);
else if (ret == GST_RTSP_EINTR)
gst_rtspsrc_loop_cancel_cmd (src, cmd);
else
gst_rtspsrc_loop_error_cmd (src, cmd);
}
static gboolean
gst_rtspsrc_loop_send_cmd (GstRTSPSrc * src, gint cmd, gint mask)
{
gint old;
gboolean flushed = FALSE;
/* start new request */
gst_rtspsrc_loop_start_cmd (src, cmd);
GST_DEBUG_OBJECT (src, "sending cmd %s", cmd_to_string (cmd));
GST_OBJECT_LOCK (src);
old = src->pending_cmd;
if (old == CMD_RECONNECT) {
GST_DEBUG_OBJECT (src, "ignore, we were reconnecting");
cmd = CMD_RECONNECT;
}
if (old != CMD_WAIT) {
src->pending_cmd = CMD_WAIT;
GST_OBJECT_UNLOCK (src);
/* cancel previous request */
GST_DEBUG_OBJECT (src, "cancel previous request %s", cmd_to_string (old));
gst_rtspsrc_loop_cancel_cmd (src, old);
GST_OBJECT_LOCK (src);
}
src->pending_cmd = cmd;
/* interrupt if allowed */
if (src->busy_cmd & mask) {
GST_DEBUG_OBJECT (src, "connection flush busy %s",
cmd_to_string (src->busy_cmd));
gst_rtspsrc_connection_flush (src, TRUE);
flushed = TRUE;
} else {
GST_DEBUG_OBJECT (src, "not interrupting busy cmd %s",
cmd_to_string (src->busy_cmd));
}
if (src->task)
gst_task_start (src->task);
GST_OBJECT_UNLOCK (src);
return flushed;
}
static gboolean
gst_rtspsrc_loop (GstRTSPSrc * src)
{
GstFlowReturn ret;
if (!src->conninfo.connection || !src->conninfo.connected)
goto no_connection;
if (src->interleaved)
ret = gst_rtspsrc_loop_interleaved (src);
else
ret = gst_rtspsrc_loop_udp (src);
if (ret != GST_FLOW_OK)
goto pause;
return TRUE;
/* ERRORS */
no_connection:
{
GST_WARNING_OBJECT (src, "we are not connected");
ret = GST_FLOW_FLUSHING;
goto pause;
}
pause:
{
const gchar *reason = gst_flow_get_name (ret);
GST_DEBUG_OBJECT (src, "pausing task, reason %s", reason);
src->running = FALSE;
if (ret == GST_FLOW_EOS) {
/* perform EOS logic */
if (src->segment.flags & GST_SEEK_FLAG_SEGMENT) {
gst_element_post_message (GST_ELEMENT_CAST (src),
gst_message_new_segment_done (GST_OBJECT_CAST (src),
src->segment.format, src->segment.position));
gst_rtspsrc_push_event (src,
gst_event_new_segment_done (src->segment.format,
src->segment.position));
} else {
gst_rtspsrc_push_event (src, gst_event_new_eos ());
}
} else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
/* for fatal errors we post an error message, post the error before the
* EOS so the app knows about the error first. */
GST_ELEMENT_ERROR (src, STREAM, FAILED,
("Internal data flow error."),
("streaming task paused, reason %s (%d)", reason, ret));
gst_rtspsrc_push_event (src, gst_event_new_eos ());
}
gst_rtspsrc_loop_send_cmd (src, CMD_WAIT, CMD_LOOP);
return FALSE;
}
}
#ifndef GST_DISABLE_GST_DEBUG
static const gchar *
gst_rtsp_auth_method_to_string (GstRTSPAuthMethod method)
{
gint index = 0;
while (method != 0) {
index++;
method >>= 1;
}
switch (index) {
case 0:
return "None";
case 1:
return "Basic";
case 2:
return "Digest";
}
return "Unknown";
}
#endif
static const gchar *
gst_rtspsrc_skip_lws (const gchar * s)
{
while (g_ascii_isspace (*s))
s++;
return s;
}
static const gchar *
gst_rtspsrc_unskip_lws (const gchar * s, const gchar * start)
{
while (s > start && g_ascii_isspace (*(s - 1)))
s--;
return s;
}
static const gchar *
gst_rtspsrc_skip_commas (const gchar * s)
{
/* The grammar allows for multiple commas */
while (g_ascii_isspace (*s) || *s == ',')
s++;
return s;
}
static const gchar *
gst_rtspsrc_skip_item (const gchar * s)
{
gboolean quoted = FALSE;
const gchar *start = s;
/* A list item ends at the last non-whitespace character
* before a comma which is not inside a quoted-string. Or at
* the end of the string.
*/
while (*s) {
if (*s == '"')
quoted = !quoted;
else if (quoted) {
if (*s == '\\' && *(s + 1))
s++;
} else {
if (*s == ',')
break;
}
s++;
}
return gst_rtspsrc_unskip_lws (s, start);
}
static void
gst_rtsp_decode_quoted_string (gchar * quoted_string)
{
gchar *src, *dst;
src = quoted_string + 1;
dst = quoted_string;
while (*src && *src != '"') {
if (*src == '\\' && *(src + 1))
src++;
*dst++ = *src++;
}
*dst = '\0';
}
/* Extract the authentication tokens that the server provided for each method
* into an array of structures and give those to the connection object.
*/
static void
gst_rtspsrc_parse_digest_challenge (GstRTSPConnection * conn,
const gchar * header, gboolean * stale)
{
GSList *list = NULL, *iter;
const gchar *end;
gchar *item, *eq, *name_end, *value;
g_return_if_fail (stale != NULL);
gst_rtsp_connection_clear_auth_params (conn);
*stale = FALSE;
/* Parse a header whose content is described by RFC2616 as
* "#something", where "something" does not itself contain commas,
* except as part of quoted-strings, into a list of allocated strings.
*/
header = gst_rtspsrc_skip_commas (header);
while (*header) {
end = gst_rtspsrc_skip_item (header);
list = g_slist_prepend (list, g_strndup (header, end - header));
header = gst_rtspsrc_skip_commas (end);
}
if (!list)
return;
list = g_slist_reverse (list);
for (iter = list; iter; iter = iter->next) {
item = iter->data;
eq = strchr (item, '=');
if (eq) {
name_end = (gchar *) gst_rtspsrc_unskip_lws (eq, item);
if (name_end == item) {
/* That's no good... */
g_free (item);
continue;
}
*name_end = '\0';
value = (gchar *) gst_rtspsrc_skip_lws (eq + 1);
if (*value == '"')
gst_rtsp_decode_quoted_string (value);
} else
value = NULL;
if (value && strcmp (item, "stale") == 0 && strcmp (value, "TRUE") == 0)
*stale = TRUE;
gst_rtsp_connection_set_auth_param (conn, item, value);
g_free (item);
}
g_slist_free (list);
}
/* Parse a WWW-Authenticate Response header and determine the
* available authentication methods
*
* This code should also cope with the fact that each WWW-Authenticate
* header can contain multiple challenge methods + tokens
*
* At the moment, for Basic auth, we just do a minimal check and don't
* even parse out the realm */
static void
gst_rtspsrc_parse_auth_hdr (gchar * hdr, GstRTSPAuthMethod * methods,
GstRTSPConnection * conn, gboolean * stale)
{
gchar *start;
g_return_if_fail (hdr != NULL);
g_return_if_fail (methods != NULL);
g_return_if_fail (stale != NULL);
/* Skip whitespace at the start of the string */
for (start = hdr; start[0] != '\0' && g_ascii_isspace (start[0]); start++);
if (g_ascii_strncasecmp (start, "basic", 5) == 0)
*methods |= GST_RTSP_AUTH_BASIC;
else if (g_ascii_strncasecmp (start, "digest ", 7) == 0) {
*methods |= GST_RTSP_AUTH_DIGEST;
gst_rtspsrc_parse_digest_challenge (conn, &start[7], stale);
}
}
/**
* gst_rtspsrc_setup_auth:
* @src: the rtsp source
*
* Configure a username and password and auth method on the
* connection object based on a response we received from the
* peer.
*
* Currently, this requires that a username and password were supplied
* in the uri. In the future, they may be requested on demand by sending
* a message up the bus.
*
* Returns: TRUE if authentication information could be set up correctly.
*/
static gboolean
gst_rtspsrc_setup_auth (GstRTSPSrc * src, GstRTSPMessage * response)
{
gchar *user = NULL;
gchar *pass = NULL;
GstRTSPAuthMethod avail_methods = GST_RTSP_AUTH_NONE;
GstRTSPAuthMethod method;
GstRTSPResult auth_result;
GstRTSPUrl *url;
GstRTSPConnection *conn;
gchar *hdr;
gboolean stale = FALSE;
conn = src->conninfo.connection;
/* Identify the available auth methods and see if any are supported */
if (gst_rtsp_message_get_header (response, GST_RTSP_HDR_WWW_AUTHENTICATE,
&hdr, 0) == GST_RTSP_OK) {
gst_rtspsrc_parse_auth_hdr (hdr, &avail_methods, conn, &stale);
}
if (avail_methods == GST_RTSP_AUTH_NONE)
goto no_auth_available;
/* For digest auth, if the response indicates that the session
* data are stale, we just update them in the connection object and
* return TRUE to retry the request */
if (stale)
src->tried_url_auth = FALSE;
url = gst_rtsp_connection_get_url (conn);
/* Do we have username and password available? */
if (url != NULL && !src->tried_url_auth && url->user != NULL
&& url->passwd != NULL) {
user = url->user;
pass = url->passwd;
src->tried_url_auth = TRUE;
GST_DEBUG_OBJECT (src,
"Attempting authentication using credentials from the URL");
} else {
user = src->user_id;
pass = src->user_pw;
GST_DEBUG_OBJECT (src,
"Attempting authentication using credentials from the properties");
}
/* FIXME: If the url didn't contain username and password or we tried them
* already, request a username and passwd from the application via some kind
* of credentials request message */
/* If we don't have a username and passwd at this point, bail out. */
if (user == NULL || pass == NULL)
goto no_user_pass;
/* Try to configure for each available authentication method, strongest to
* weakest */
for (method = GST_RTSP_AUTH_MAX; method != GST_RTSP_AUTH_NONE; method >>= 1) {
/* Check if this method is available on the server */
if ((method & avail_methods) == 0)
continue;
/* Pass the credentials to the connection to try on the next request */
auth_result = gst_rtsp_connection_set_auth (conn, method, user, pass);
/* INVAL indicates an invalid username/passwd were supplied, so we'll just
* ignore it and end up retrying later */
if (auth_result == GST_RTSP_OK || auth_result == GST_RTSP_EINVAL) {
GST_DEBUG_OBJECT (src, "Attempting %s authentication",
gst_rtsp_auth_method_to_string (method));
break;
}
}
if (method == GST_RTSP_AUTH_NONE)
goto no_auth_available;
return TRUE;
no_auth_available:
{
/* Output an error indicating that we couldn't connect because there were
* no supported authentication protocols */
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
("No supported authentication protocol was found"));
return FALSE;
}
no_user_pass:
{
/* We don't fire an error message, we just return FALSE and let the
* normal NOT_AUTHORIZED error be propagated */
return FALSE;
}
}
static GstRTSPResult
gst_rtspsrc_try_send (GstRTSPSrc * src, GstRTSPConnection * conn,
GstRTSPMessage * request, GstRTSPMessage * response,
GstRTSPStatusCode * code)
{
GstRTSPResult res;
GstRTSPStatusCode thecode;
gchar *content_base = NULL;
gint try = 0;
again:
if (!src->short_header)
gst_rtsp_ext_list_before_send (src->extensions, request);
GST_DEBUG_OBJECT (src, "sending message");
if (src->debug)
gst_rtsp_message_dump (request);
res = gst_rtspsrc_connection_send (src, conn, request, src->ptcp_timeout);
if (res < 0)
goto send_error;
gst_rtsp_connection_reset_timeout (conn);
next:
res = gst_rtspsrc_connection_receive (src, conn, response, src->ptcp_timeout);
if (res < 0)
goto receive_error;
if (src->debug)
gst_rtsp_message_dump (response);
switch (response->type) {
case GST_RTSP_MESSAGE_REQUEST:
res = gst_rtspsrc_handle_request (src, conn, response);
if (res == GST_RTSP_EEOF)
goto server_eof;
else if (res < 0)
goto handle_request_failed;
goto next;
case GST_RTSP_MESSAGE_RESPONSE:
/* ok, a response is good */
GST_DEBUG_OBJECT (src, "received response message");
break;
case GST_RTSP_MESSAGE_DATA:
/* get next response */
GST_DEBUG_OBJECT (src, "handle data response message");
gst_rtspsrc_handle_data (src, response);
goto next;
default:
GST_WARNING_OBJECT (src, "ignoring unknown message type %d",
response->type);
goto next;
}
thecode = response->type_data.response.code;
GST_DEBUG_OBJECT (src, "got response message %d", thecode);
/* if the caller wanted the result code, we store it. */
if (code)
*code = thecode;
/* If the request didn't succeed, bail out before doing any more */
if (thecode != GST_RTSP_STS_OK)
return GST_RTSP_OK;
/* store new content base if any */
gst_rtsp_message_get_header (response, GST_RTSP_HDR_CONTENT_BASE,
&content_base, 0);
if (content_base) {
g_free (src->content_base);
src->content_base = g_strdup (content_base);
}
gst_rtsp_ext_list_after_send (src->extensions, request, response);
return GST_RTSP_OK;
/* ERRORS */
send_error:
{
gchar *str = gst_rtsp_strresult (res);
if (res != GST_RTSP_EINTR) {
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not send message. (%s)", str));
} else {
GST_WARNING_OBJECT (src, "send interrupted");
}
g_free (str);
return res;
}
receive_error:
{
switch (res) {
case GST_RTSP_EEOF:
GST_WARNING_OBJECT (src, "server closed connection");
if ((try == 0) && !src->interleaved && src->udp_reconnect) {
try++;
/* if reconnect succeeds, try again */
if ((res =
gst_rtsp_conninfo_reconnect (src, &src->conninfo,
FALSE)) == 0)
goto again;
}
/* only try once after reconnect, then fallthrough and error out */
default:
{
gchar *str = gst_rtsp_strresult (res);
if (res != GST_RTSP_EINTR) {
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not receive message. (%s)", str));
} else {
GST_WARNING_OBJECT (src, "receive interrupted");
}
g_free (str);
break;
}
}
return res;
}
handle_request_failed:
{
/* ERROR was posted */
gst_rtsp_message_unset (response);
return res;
}
server_eof:
{
GST_DEBUG_OBJECT (src, "we got an eof from the server");
GST_ELEMENT_WARNING (src, RESOURCE, READ, (NULL),
("The server closed the connection."));
gst_rtsp_message_unset (response);
return res;
}
}
/**
* gst_rtspsrc_send:
* @src: the rtsp source
* @conn: the connection to send on
* @request: must point to a valid request
* @response: must point to an empty #GstRTSPMessage
* @code: an optional code result
*
* send @request and retrieve the response in @response. optionally @code can be
* non-NULL in which case it will contain the status code of the response.
*
* If This function returns #GST_RTSP_OK, @response will contain a valid response
* message that should be cleaned with gst_rtsp_message_unset() after usage.
*
* If @code is NULL, this function will return #GST_RTSP_ERROR (with an invalid
* @response message) if the response code was not 200 (OK).
*
* If the attempt results in an authentication failure, then this will attempt
* to retrieve authentication credentials via gst_rtspsrc_setup_auth and retry
* the request.
*
* Returns: #GST_RTSP_OK if the processing was successful.
*/
static GstRTSPResult
gst_rtspsrc_send (GstRTSPSrc * src, GstRTSPConnection * conn,
GstRTSPMessage * request, GstRTSPMessage * response,
GstRTSPStatusCode * code)
{
GstRTSPStatusCode int_code = GST_RTSP_STS_OK;
GstRTSPResult res = GST_RTSP_ERROR;
gint count;
gboolean retry;
GstRTSPMethod method = GST_RTSP_INVALID;
count = 0;
do {
retry = FALSE;
/* make sure we don't loop forever */
if (count++ > 8)
break;
/* save method so we can disable it when the server complains */
method = request->type_data.request.method;
if ((res =
gst_rtspsrc_try_send (src, conn, request, response, &int_code)) < 0)
goto error;
switch (int_code) {
case GST_RTSP_STS_UNAUTHORIZED:
if (gst_rtspsrc_setup_auth (src, response)) {
/* Try the request/response again after configuring the auth info
* and loop again */
retry = TRUE;
}
break;
default:
break;
}
} while (retry == TRUE);
/* If the user requested the code, let them handle errors, otherwise
* post an error below */
if (code != NULL)
*code = int_code;
else if (int_code != GST_RTSP_STS_OK)
goto error_response;
return res;
/* ERRORS */
error:
{
GST_DEBUG_OBJECT (src, "got error %d", res);
return res;
}
error_response:
{
res = GST_RTSP_ERROR;
switch (response->type_data.response.code) {
case GST_RTSP_STS_NOT_FOUND:
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL), ("%s",
response->type_data.response.reason));
break;
case GST_RTSP_STS_UNAUTHORIZED:
GST_ELEMENT_ERROR (src, RESOURCE, NOT_AUTHORIZED, (NULL), ("%s",
response->type_data.response.reason));
break;
case GST_RTSP_STS_MOVED_PERMANENTLY:
case GST_RTSP_STS_MOVE_TEMPORARILY:
{
gchar *new_location;
GstRTSPLowerTrans transports;
GST_DEBUG_OBJECT (src, "got redirection");
/* if we don't have a Location Header, we must error */
if (gst_rtsp_message_get_header (response, GST_RTSP_HDR_LOCATION,
&new_location, 0) < 0)
break;
/* When we receive a redirect result, we go back to the INIT state after
* parsing the new URI. The caller should do the needed steps to issue
* a new setup when it detects this state change. */
GST_DEBUG_OBJECT (src, "redirection to %s", new_location);
/* save current transports */
if (src->conninfo.url)
transports = src->conninfo.url->transports;
else
transports = GST_RTSP_LOWER_TRANS_UNKNOWN;
gst_rtspsrc_uri_set_uri (GST_URI_HANDLER (src), new_location, NULL);
/* set old transports */
if (src->conninfo.url && transports != GST_RTSP_LOWER_TRANS_UNKNOWN)
src->conninfo.url->transports = transports;
src->need_redirect = TRUE;
src->state = GST_RTSP_STATE_INIT;
res = GST_RTSP_OK;
break;
}
case GST_RTSP_STS_NOT_ACCEPTABLE:
case GST_RTSP_STS_NOT_IMPLEMENTED:
case GST_RTSP_STS_METHOD_NOT_ALLOWED:
GST_WARNING_OBJECT (src, "got NOT IMPLEMENTED, disable method %s",
gst_rtsp_method_as_text (method));
src->methods &= ~method;
res = GST_RTSP_OK;
break;
default:
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Got error response: %d (%s).", response->type_data.response.code,
response->type_data.response.reason));
break;
}
/* if we return ERROR we should unset the response ourselves */
if (res == GST_RTSP_ERROR)
gst_rtsp_message_unset (response);
return res;
}
}
static GstRTSPResult
gst_rtspsrc_send_cb (GstRTSPExtension * ext, GstRTSPMessage * request,
GstRTSPMessage * response, GstRTSPSrc * src)
{
return gst_rtspsrc_send (src, src->conninfo.connection, request, response,
NULL);
}
/* parse the response and collect all the supported methods. We need this
* information so that we don't try to send an unsupported request to the
* server.
*/
static gboolean
gst_rtspsrc_parse_methods (GstRTSPSrc * src, GstRTSPMessage * response)
{
GstRTSPHeaderField field;
gchar *respoptions;
gint indx = 0;
/* reset supported methods */
src->methods = 0;
/* Try Allow Header first */
field = GST_RTSP_HDR_ALLOW;
while (TRUE) {
respoptions = NULL;
gst_rtsp_message_get_header (response, field, &respoptions, indx);
if (indx == 0 && !respoptions) {
/* if no Allow header was found then try the Public header... */
field = GST_RTSP_HDR_PUBLIC;
gst_rtsp_message_get_header (response, field, &respoptions, indx);
}
if (!respoptions)
break;
src->methods |= gst_rtsp_options_from_text (respoptions);
indx++;
}
if (src->methods == 0) {
/* neither Allow nor Public are required, assume the server supports
* at least DESCRIBE, SETUP, we always assume it supports PLAY as
* well. */
GST_DEBUG_OBJECT (src, "could not get OPTIONS");
src->methods = GST_RTSP_DESCRIBE | GST_RTSP_SETUP;
}
/* always assume PLAY, FIXME, extensions should be able to override
* this */
src->methods |= GST_RTSP_PLAY;
/* also assume it will support Range */
src->seekable = TRUE;
/* we need describe and setup */
if (!(src->methods & GST_RTSP_DESCRIBE))
goto no_describe;
if (!(src->methods & GST_RTSP_SETUP))
goto no_setup;
return TRUE;
/* ERRORS */
no_describe:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
("Server does not support DESCRIBE."));
return FALSE;
}
no_setup:
{
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ, (NULL),
("Server does not support SETUP."));
return FALSE;
}
}
/* masks to be kept in sync with the hardcoded protocol order of preference
* in code below */
static const guint protocol_masks[] = {
GST_RTSP_LOWER_TRANS_UDP,
GST_RTSP_LOWER_TRANS_UDP_MCAST,
GST_RTSP_LOWER_TRANS_TCP,
0
};
static GstRTSPResult
gst_rtspsrc_create_transports_string (GstRTSPSrc * src,
GstRTSPLowerTrans protocols, GstRTSPProfile profile, gchar ** transports)
{
GstRTSPResult res;
GString *result;
gboolean add_udp_str;
*transports = NULL;
res =
gst_rtsp_ext_list_get_transports (src->extensions, protocols, transports);
if (res < 0)
goto failed;
GST_DEBUG_OBJECT (src, "got transports %s", GST_STR_NULL (*transports));
/* extension listed transports, use those */
if (*transports != NULL)
return GST_RTSP_OK;
/* it's the default */
add_udp_str = FALSE;
/* the default RTSP transports */
result = g_string_new ("RTP");
switch (profile) {
case GST_RTSP_PROFILE_AVP:
g_string_append (result, "/AVP");
break;
case GST_RTSP_PROFILE_SAVP:
g_string_append (result, "/SAVP");
break;
case GST_RTSP_PROFILE_AVPF:
g_string_append (result, "/AVPF");
break;
case GST_RTSP_PROFILE_SAVPF:
g_string_append (result, "/SAVPF");
break;
default:
break;
}
if (protocols & GST_RTSP_LOWER_TRANS_UDP) {
GST_DEBUG_OBJECT (src, "adding UDP unicast");
if (add_udp_str)
g_string_append (result, "/UDP");
g_string_append (result, ";unicast;client_port=%%u1-%%u2");
} else if (protocols & GST_RTSP_LOWER_TRANS_UDP_MCAST) {
GST_DEBUG_OBJECT (src, "adding UDP multicast");
/* we don't have to allocate any UDP ports yet, if the selected transport
* turns out to be multicast we can create them and join the multicast
* group indicated in the transport reply */
if (add_udp_str)
g_string_append (result, "/UDP");
g_string_append (result, ";multicast");
if (src->next_port_num != 0) {
if (src->client_port_range.max > 0 &&
src->next_port_num >= src->client_port_range.max)
goto no_ports;
g_string_append_printf (result, ";client_port=%d-%d",
src->next_port_num, src->next_port_num + 1);
}
} else if (protocols & GST_RTSP_LOWER_TRANS_TCP) {
GST_DEBUG_OBJECT (src, "adding TCP");
g_string_append (result, "/TCP;unicast;interleaved=%%i1-%%i2");
}
*transports = g_string_free (result, FALSE);
GST_DEBUG_OBJECT (src, "prepared transports %s", GST_STR_NULL (*transports));
return GST_RTSP_OK;
/* ERRORS */
failed:
{
GST_ERROR ("extension gave error %d", res);
return res;
}
no_ports:
{
GST_ERROR ("no more ports available");
return GST_RTSP_ERROR;
}
}
static GstRTSPResult
gst_rtspsrc_prepare_transports (GstRTSPStream * stream, gchar ** transports,
gint orig_rtpport, gint orig_rtcpport)
{
GstRTSPSrc *src;
gint nr_udp, nr_int;
gchar *next, *p;
gint rtpport = 0, rtcpport = 0;
GString *str;
src = stream->parent;
/* find number of placeholders first */
if (strstr (*transports, "%%i2"))
nr_int = 2;
else if (strstr (*transports, "%%i1"))
nr_int = 1;
else
nr_int = 0;
if (strstr (*transports, "%%u2"))
nr_udp = 2;
else if (strstr (*transports, "%%u1"))
nr_udp = 1;
else
nr_udp = 0;
if (nr_udp == 0 && nr_int == 0)
goto done;
if (nr_udp > 0) {
if (!orig_rtpport || !orig_rtcpport) {
if (!gst_rtspsrc_alloc_udp_ports (stream, &rtpport, &rtcpport))
goto failed;
} else {
rtpport = orig_rtpport;
rtcpport = orig_rtcpport;
}
}
str = g_string_new ("");
p = *transports;
while ((next = strstr (p, "%%"))) {
g_string_append_len (str, p, next - p);
if (next[2] == 'u') {
if (next[3] == '1')
g_string_append_printf (str, "%d", rtpport);
else if (next[3] == '2')
g_string_append_printf (str, "%d", rtcpport);
}
if (next[2] == 'i') {
if (next[3] == '1')
g_string_append_printf (str, "%d", src->free_channel);
else if (next[3] == '2')
g_string_append_printf (str, "%d", src->free_channel + 1);
}
p = next + 4;
}
/* append final part */
g_string_append (str, p);
g_free (*transports);
*transports = g_string_free (str, FALSE);
done:
return GST_RTSP_OK;
/* ERRORS */
failed:
{
GST_ERROR ("failed to allocate udp ports");
return GST_RTSP_ERROR;
}
}
static guint8
enc_key_length_from_cipher_name (const gchar * cipher)
{
if (g_strcmp0 (cipher, "aes-128-icm") == 0)
return AES_128_KEY_LEN;
else if (g_strcmp0 (cipher, "aes-256-icm") == 0)
return AES_256_KEY_LEN;
else {
GST_ERROR ("encryption algorithm '%s' not supported", cipher);
return 0;
}
}
static guint8
auth_key_length_from_auth_name (const gchar * auth)
{
if (g_strcmp0 (auth, "hmac-sha1-32") == 0)
return HMAC_32_KEY_LEN;
else if (g_strcmp0 (auth, "hmac-sha1-80") == 0)
return HMAC_80_KEY_LEN;
else {
GST_ERROR ("authentication algorithm '%s' not supported", auth);
return 0;
}
}
static GstCaps *
signal_get_srtcp_params (GstRTSPSrc * src, GstRTSPStream * stream)
{
GstCaps *caps = NULL;
g_signal_emit (src, gst_rtspsrc_signals[SIGNAL_REQUEST_RTCP_KEY], 0,
stream->id, &caps);
if (caps != NULL)
GST_DEBUG_OBJECT (src, "SRTP parameters received");
return caps;
}
static GstCaps *
default_srtcp_params (void)
{
guint i;
GstCaps *caps;
GstBuffer *buf;
guint8 *key_data;
#define KEY_SIZE 30
/* create a random key */
key_data = g_malloc (KEY_SIZE);
for (i = 0; i < KEY_SIZE; i += 4)
GST_WRITE_UINT32_BE (key_data + i, g_random_int ());
buf = gst_buffer_new_wrapped (key_data, KEY_SIZE);
caps = gst_caps_new_simple ("application/x-srtp",
"srtp-key", GST_TYPE_BUFFER, buf,
"srtcp-cipher", G_TYPE_STRING, "aes-128-icm",
"srtcp-auth", G_TYPE_STRING, "hmac-sha1-80", NULL);
gst_buffer_unref (buf);
return caps;
}
static gchar *
gst_rtspsrc_stream_make_keymgmt (GstRTSPSrc * src, GstRTSPStream * stream)
{
GBytes *bytes;
gchar *result, *base64;
const guint8 *data;
gsize size;
GstMIKEYMessage *msg;
GstMIKEYPayload *payload, *pkd;
guint8 byte;
GstStructure *s;
GstMapInfo info;
GstBuffer *srtpkey;
const GValue *val;
const gchar *srtcpcipher, *srtcpauth;
stream->srtcpparams = signal_get_srtcp_params (src, stream);
if (stream->srtcpparams == NULL)
stream->srtcpparams = default_srtcp_params ();
s = gst_caps_get_structure (stream->srtcpparams, 0);
srtcpcipher = gst_structure_get_string (s, "srtcp-cipher");
srtcpauth = gst_structure_get_string (s, "srtcp-auth");
val = gst_structure_get_value (s, "srtp-key");
if (srtcpcipher == NULL || srtcpauth == NULL || val == NULL) {
GST_ERROR_OBJECT (src, "could not find the right SRTP parameters in caps");
return NULL;
}
srtpkey = gst_value_get_buffer (val);
msg = gst_mikey_message_new ();
/* unencrypted MIKEY message, we send this over TLS so this is allowed */
gst_mikey_message_set_info (msg, GST_MIKEY_VERSION, GST_MIKEY_TYPE_PSK_INIT,
FALSE, GST_MIKEY_PRF_MIKEY_1, g_random_int (), GST_MIKEY_MAP_TYPE_SRTP);
/* add policy '0' for our SSRC */
gst_mikey_message_add_cs_srtp (msg, 0, stream->send_ssrc, 0);
/* timestamp is now */
gst_mikey_message_add_t_now_ntp_utc (msg);
/* add some random data */
gst_mikey_message_add_rand_len (msg, 16);
/* the policy '0' is SRTP */
payload = gst_mikey_payload_new (GST_MIKEY_PT_SP);
gst_mikey_payload_sp_set (payload, 0, GST_MIKEY_SEC_PROTO_SRTP);
/* only AES-CM is supported */
byte = 1;
gst_mikey_payload_sp_add_param (payload, GST_MIKEY_SP_SRTP_ENC_ALG, 1, &byte);
/* encryption key length */
byte = enc_key_length_from_cipher_name (srtcpcipher);
gst_mikey_payload_sp_add_param (payload, GST_MIKEY_SP_SRTP_ENC_KEY_LEN, 1,
&byte);
/* only HMAC-SHA1 */
gst_mikey_payload_sp_add_param (payload, GST_MIKEY_SP_SRTP_AUTH_ALG, 1,
&byte);
/* authentication key length */
byte = auth_key_length_from_auth_name (srtcpauth);
gst_mikey_payload_sp_add_param (payload, GST_MIKEY_SP_SRTP_AUTH_KEY_LEN, 1,
&byte);
/* we enable encryption on RTP and RTCP */
gst_mikey_payload_sp_add_param (payload, GST_MIKEY_SP_SRTP_SRTP_ENC, 1,
&byte);
gst_mikey_payload_sp_add_param (payload, GST_MIKEY_SP_SRTP_SRTCP_ENC, 1,
&byte);
/* we enable authentication on RTP and RTCP */
gst_mikey_payload_sp_add_param (payload, GST_MIKEY_SP_SRTP_SRTP_AUTH, 1,
&byte);
gst_mikey_message_add_payload (msg, payload);
/* make unencrypted KEMAC */
payload = gst_mikey_payload_new (GST_MIKEY_PT_KEMAC);
gst_mikey_payload_kemac_set (payload, GST_MIKEY_ENC_NULL, GST_MIKEY_MAC_NULL);
/* add the key in KEMAC */
pkd = gst_mikey_payload_new (GST_MIKEY_PT_KEY_DATA);
gst_buffer_map (srtpkey, &info, GST_MAP_READ);
gst_mikey_payload_key_data_set_key (pkd, GST_MIKEY_KD_TEK, info.size,
info.data);
gst_buffer_unmap (srtpkey, &info);
gst_mikey_payload_kemac_add_sub (payload, pkd);
gst_mikey_message_add_payload (msg, payload);
/* now serialize this to bytes */
bytes = gst_mikey_message_to_bytes (msg, NULL, NULL);
gst_mikey_message_unref (msg);
/* and make it into base64 */
data = g_bytes_get_data (bytes, &size);
base64 = g_base64_encode (data, size);
g_bytes_unref (bytes);
result = g_strdup_printf ("prot=mikey;uri=\"%s\";data=\"%s\"",
stream->conninfo.location, base64);
g_free (base64);
return result;
}
/* Perform the SETUP request for all the streams.
*
* We ask the server for a specific transport, which initially includes all the
* ones we can support (UDP/TCP/MULTICAST). For the UDP transport we allocate
* two local UDP ports that we send to the server.
*
* Once the server replied with a transport, we configure the other streams
* with the same transport.
*
* This function will also configure the stream for the selected transport,
* which basically means creating the pipeline.
*/
static GstRTSPResult
gst_rtspsrc_setup_streams (GstRTSPSrc * src, gboolean async)
{
GList *walk;
GstRTSPResult res = GST_RTSP_ERROR;
GstRTSPMessage request = { 0 };
GstRTSPMessage response = { 0 };
GstRTSPStream *stream = NULL;
GstRTSPLowerTrans protocols;
GstRTSPStatusCode code;
gboolean unsupported_real = FALSE;
gint rtpport, rtcpport;
GstRTSPUrl *url;
gchar *hval;
if (src->conninfo.connection) {
url = gst_rtsp_connection_get_url (src->conninfo.connection);
/* we initially allow all configured lower transports. based on the URL
* transports and the replies from the server we narrow them down. */
protocols = url->transports & src->cur_protocols;
} else {
url = NULL;
protocols = src->cur_protocols;
}
if (protocols == 0)
goto no_protocols;
/* reset some state */
src->free_channel = 0;
src->interleaved = FALSE;
src->need_activate = FALSE;
/* keep track of next port number, 0 is random */
src->next_port_num = src->client_port_range.min;
rtpport = rtcpport = 0;
if (G_UNLIKELY (src->streams == NULL))
goto no_streams;
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPConnection *conn;
gchar *transports;
gint retry = 0;
guint mask = 0;
gboolean selected;
GstCaps *caps;
stream = (GstRTSPStream *) walk->data;
caps = stream_get_caps_for_pt (stream, stream->default_pt);
if (caps == NULL) {
GST_DEBUG_OBJECT (src, "skipping stream %p, no caps", stream);
continue;
}
if (stream->skipped) {
GST_DEBUG_OBJECT (src, "skipping stream %p", stream);
continue;
}
/* see if we need to configure this stream */
if (!gst_rtsp_ext_list_configure_stream (src->extensions, caps)) {
GST_DEBUG_OBJECT (src, "skipping stream %p, disabled by extension",
stream);
continue;
}
g_signal_emit (src, gst_rtspsrc_signals[SIGNAL_SELECT_STREAM], 0,
stream->id, caps, &selected);
if (!selected) {
GST_DEBUG_OBJECT (src, "skipping stream %p, disabled by signal", stream);
continue;
}
/* merge/overwrite global caps */
if (caps) {
guint j, num;
GstStructure *s;
s = gst_caps_get_structure (caps, 0);
num = gst_structure_n_fields (src->props);
for (j = 0; j < num; j++) {
const gchar *name;
const GValue *val;
name = gst_structure_nth_field_name (src->props, j);
val = gst_structure_get_value (src->props, name);
gst_structure_set_value (s, name, val);
GST_DEBUG_OBJECT (src, "copied %s", name);
}
}
/* skip setup if we have no URL for it */
if (stream->conninfo.location == NULL) {
GST_DEBUG_OBJECT (src, "skipping stream %p, no setup", stream);
continue;
}
if (src->conninfo.connection == NULL) {
if (!gst_rtsp_conninfo_connect (src, &stream->conninfo, async)) {
GST_DEBUG_OBJECT (src, "skipping stream %p, failed to connect", stream);
continue;
}
conn = stream->conninfo.connection;
} else {
conn = src->conninfo.connection;
}
GST_DEBUG_OBJECT (src, "doing setup of stream %p with %s", stream,
stream->conninfo.location);
/* if we have a multicast connection, only suggest multicast from now on */
if (stream->is_multicast)
protocols &= GST_RTSP_LOWER_TRANS_UDP_MCAST;
next_protocol:
/* first selectable protocol */
while (protocol_masks[mask] && !(protocols & protocol_masks[mask]))
mask++;
if (!protocol_masks[mask])
goto no_protocols;
retry:
GST_DEBUG_OBJECT (src, "protocols = 0x%x, protocol mask = 0x%x", protocols,
protocol_masks[mask]);
/* create a string with first transport in line */
transports = NULL;
res = gst_rtspsrc_create_transports_string (src,
protocols & protocol_masks[mask], stream->profile, &transports);
if (res < 0 || transports == NULL)
goto setup_transport_failed;
if (strlen (transports) == 0) {
g_free (transports);
GST_DEBUG_OBJECT (src, "no transports found");
mask++;
goto next_protocol;
}
GST_DEBUG_OBJECT (src, "replace ports in %s", GST_STR_NULL (transports));
/* replace placeholders with real values, this function will optionally
* allocate UDP ports and other info needed to execute the setup request */
res = gst_rtspsrc_prepare_transports (stream, &transports,
retry > 0 ? rtpport : 0, retry > 0 ? rtcpport : 0);
if (res < 0) {
g_free (transports);
goto setup_transport_failed;
}
GST_DEBUG_OBJECT (src, "transport is now %s", GST_STR_NULL (transports));
/* create SETUP request */
res =
gst_rtsp_message_init_request (&request, GST_RTSP_SETUP,
stream->conninfo.location);
if (res < 0) {
g_free (transports);
goto create_request_failed;
}
/* select transport */
gst_rtsp_message_take_header (&request, GST_RTSP_HDR_TRANSPORT, transports);
/* set up keys */
if (stream->profile == GST_RTSP_PROFILE_SAVP ||
stream->profile == GST_RTSP_PROFILE_SAVPF) {
hval = gst_rtspsrc_stream_make_keymgmt (src, stream);
gst_rtsp_message_take_header (&request, GST_RTSP_HDR_KEYMGMT, hval);
}
/* if the user wants a non default RTP packet size we add the blocksize
* parameter */
if (src->rtp_blocksize > 0) {
hval = g_strdup_printf ("%d", src->rtp_blocksize);
gst_rtsp_message_take_header (&request, GST_RTSP_HDR_BLOCKSIZE, hval);
}
if (async)
GST_ELEMENT_PROGRESS (src, CONTINUE, "request", ("SETUP stream %d",
stream->id));
/* handle the code ourselves */
res = gst_rtspsrc_send (src, conn, &request, &response, &code);
if (res < 0)
goto send_error;
switch (code) {
case GST_RTSP_STS_OK:
break;
case GST_RTSP_STS_UNSUPPORTED_TRANSPORT:
gst_rtsp_message_unset (&request);
gst_rtsp_message_unset (&response);
/* cleanup of leftover transport */
gst_rtspsrc_stream_free_udp (stream);
/* MS WMServer RTSP MUST use same UDP pair in all SETUP requests;
* we might be in this case */
if (stream->container && rtpport && rtcpport && !retry) {
GST_DEBUG_OBJECT (src, "retrying with original port pair %u-%u",
rtpport, rtcpport);
retry++;
goto retry;
}
/* this transport did not go down well, but we may have others to try
* that we did not send yet, try those and only give up then
* but not without checking for lost cause/extension so we can
* post a nicer/more useful error message later */
if (!unsupported_real)
unsupported_real = stream->is_real;
/* select next available protocol, give up on this stream if none */
mask++;
while (protocol_masks[mask] && !(protocols & protocol_masks[mask]))
mask++;
if (!protocol_masks[mask] || unsupported_real)
continue;
else
goto retry;
default:
/* cleanup of leftover transport and move to the next stream */
gst_rtspsrc_stream_free_udp (stream);
goto response_error;
}
/* parse response transport */
{
gchar *resptrans = NULL;
GstRTSPTransport transport = { 0 };
gst_rtsp_message_get_header (&response, GST_RTSP_HDR_TRANSPORT,
&resptrans, 0);
if (!resptrans) {
gst_rtspsrc_stream_free_udp (stream);
goto no_transport;
}
/* parse transport, go to next stream on parse error */
if (gst_rtsp_transport_parse (resptrans, &transport) != GST_RTSP_OK) {
GST_WARNING_OBJECT (src, "failed to parse transport %s", resptrans);
goto next;
}
/* update allowed transports for other streams. once the transport of
* one stream has been determined, we make sure that all other streams
* are configured in the same way */
switch (transport.lower_transport) {
case GST_RTSP_LOWER_TRANS_TCP:
GST_DEBUG_OBJECT (src, "stream %p as TCP interleaved", stream);
protocols = GST_RTSP_LOWER_TRANS_TCP;
src->interleaved = TRUE;
/* update free channels */
src->free_channel =
MAX (transport.interleaved.min, src->free_channel);
src->free_channel =
MAX (transport.interleaved.max, src->free_channel);
src->free_channel++;
break;
case GST_RTSP_LOWER_TRANS_UDP_MCAST:
/* only allow multicast for other streams */
GST_DEBUG_OBJECT (src, "stream %p as UDP multicast", stream);
protocols = GST_RTSP_LOWER_TRANS_UDP_MCAST;
/* if the server selected our ports, increment our counters so that
* we select a new port later */
if (src->next_port_num == transport.port.min &&
src->next_port_num + 1 == transport.port.max) {
src->next_port_num += 2;
}
break;
case GST_RTSP_LOWER_TRANS_UDP:
/* only allow unicast for other streams */
GST_DEBUG_OBJECT (src, "stream %p as UDP unicast", stream);
protocols = GST_RTSP_LOWER_TRANS_UDP;
break;
default:
GST_DEBUG_OBJECT (src, "stream %p unknown transport %d", stream,
transport.lower_transport);
break;
}
if (!src->interleaved || !retry) {
/* now configure the stream with the selected transport */
if (!gst_rtspsrc_stream_configure_transport (stream, &transport)) {
GST_DEBUG_OBJECT (src,
"could not configure stream %p transport, skipping stream",
stream);
goto next;
} else if (stream->udpsrc[0] && stream->udpsrc[1]) {
/* retain the first allocated UDP port pair */
g_object_get (G_OBJECT (stream->udpsrc[0]), "port", &rtpport, NULL);
g_object_get (G_OBJECT (stream->udpsrc[1]), "port", &rtcpport, NULL);
}
}
/* we need to activate at least one streams when we detect activity */
src->need_activate = TRUE;
/* stream is setup now */
stream->setup = TRUE;
{
GList *skip = walk;
while (TRUE) {
GstRTSPStream *sskip;
skip = g_list_next (skip);
if (skip == NULL)
break;
sskip = (GstRTSPStream *) skip->data;
/* skip all streams with the same control url */
if (g_str_equal (stream->conninfo.location, sskip->conninfo.location)) {
GST_DEBUG_OBJECT (src, "found stream %p with same control %s",
sskip, sskip->conninfo.location);
sskip->skipped = TRUE;
}
}
}
next:
/* clean up our transport struct */
gst_rtsp_transport_init (&transport);
/* clean up used RTSP messages */
gst_rtsp_message_unset (&request);
gst_rtsp_message_unset (&response);
}
}
/* store the transport protocol that was configured */
src->cur_protocols = protocols;
gst_rtsp_ext_list_stream_select (src->extensions, url);
/* if there is nothing to activate, error out */
if (!src->need_activate)
goto nothing_to_activate;
return res;
/* ERRORS */
no_protocols:
{
/* no transport possible, post an error and stop */
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not connect to server, no protocols left"));
return GST_RTSP_ERROR;
}
no_streams:
{
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("SDP contains no streams"));
return GST_RTSP_ERROR;
}
create_request_failed:
{
gchar *str = gst_rtsp_strresult (res);
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
("Could not create request. (%s)", str));
g_free (str);
goto cleanup_error;
}
setup_transport_failed:
{
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Could not setup transport."));
res = GST_RTSP_ERROR;
goto cleanup_error;
}
response_error:
{
const gchar *str = gst_rtsp_status_as_text (code);
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Error (%d): %s", code, GST_STR_NULL (str)));
res = GST_RTSP_ERROR;
goto cleanup_error;
}
send_error:
{
gchar *str = gst_rtsp_strresult (res);
if (res != GST_RTSP_EINTR) {
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not send message. (%s)", str));
} else {
GST_WARNING_OBJECT (src, "send interrupted");
}
g_free (str);
goto cleanup_error;
}
no_transport:
{
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Server did not select transport."));
res = GST_RTSP_ERROR;
goto cleanup_error;
}
nothing_to_activate:
{
/* none of the available error codes is really right .. */
if (unsupported_real) {
GST_ELEMENT_ERROR (src, STREAM, CODEC_NOT_FOUND,
(_("No supported stream was found. You might need to install a "
"GStreamer RTSP extension plugin for Real media streams.")),
(NULL));
} else {
GST_ELEMENT_ERROR (src, STREAM, CODEC_NOT_FOUND,
(_("No supported stream was found. You might need to allow "
"more transport protocols or may otherwise be missing "
"the right GStreamer RTSP extension plugin.")), (NULL));
}
return GST_RTSP_ERROR;
}
cleanup_error:
{
gst_rtsp_message_unset (&request);
gst_rtsp_message_unset (&response);
return res;
}
}
static gboolean
gst_rtspsrc_parse_range (GstRTSPSrc * src, const gchar * range,
GstSegment * segment)
{
gint64 seconds;
GstRTSPTimeRange *therange;
if (src->range)
gst_rtsp_range_free (src->range);
if (gst_rtsp_range_parse (range, &therange) == GST_RTSP_OK) {
GST_DEBUG_OBJECT (src, "parsed range %s", range);
src->range = therange;
} else {
GST_DEBUG_OBJECT (src, "failed to parse range %s", range);
src->range = NULL;
gst_segment_init (segment, GST_FORMAT_TIME);
return FALSE;
}
GST_DEBUG_OBJECT (src, "range: type %d, min %f - type %d, max %f ",
therange->min.type, therange->min.seconds, therange->max.type,
therange->max.seconds);
if (therange->min.type == GST_RTSP_TIME_NOW)
seconds = 0;
else if (therange->min.type == GST_RTSP_TIME_END)
seconds = 0;
else
seconds = therange->min.seconds * GST_SECOND;
GST_DEBUG_OBJECT (src, "range: min %" GST_TIME_FORMAT,
GST_TIME_ARGS (seconds));
/* we need to start playback without clipping from the position reported by
* the server */
segment->start = seconds;
segment->position = seconds;
if (therange->max.type == GST_RTSP_TIME_NOW)
seconds = -1;
else if (therange->max.type == GST_RTSP_TIME_END)
seconds = -1;
else
seconds = therange->max.seconds * GST_SECOND;
GST_DEBUG_OBJECT (src, "range: max %" GST_TIME_FORMAT,
GST_TIME_ARGS (seconds));
/* live (WMS) server might send overflowed large max as its idea of infinity,
* compensate to prevent problems later on */
if (seconds != -1 && seconds < 0) {
seconds = -1;
GST_DEBUG_OBJECT (src, "insane range, set to NONE");
}
/* live (WMS) might send min == max, which is not worth recording */
if (segment->duration == -1 && seconds == segment->start)
seconds = -1;
/* don't change duration with unknown value, we might have a valid value
* there that we want to keep. */
if (seconds != -1)
segment->duration = seconds;
return TRUE;
}
/* Parse clock profived by the server with following syntax:
*
* "GstNetTimeProvider <wrapped-clock> <server-IP:port> <clock-time>"
*/
static gboolean
gst_rtspsrc_parse_gst_clock (GstRTSPSrc * src, const gchar * gstclock)
{
gboolean res = FALSE;
if (g_str_has_prefix (gstclock, "GstNetTimeProvider ")) {
gchar **fields = NULL, **parts = NULL;
gchar *remote_ip, *str;
gint port;
GstClockTime base_time;
GstClock *netclock;
fields = g_strsplit (gstclock, " ", 0);
/* wrapped clock, not very interesting for now */
if (fields[1] == NULL)
goto cleanup;
/* remote IP address and port */
if ((str = fields[2]) == NULL)
goto cleanup;
parts = g_strsplit (str, ":", 0);
if ((remote_ip = parts[0]) == NULL)
goto cleanup;
if ((str = parts[1]) == NULL)
goto cleanup;
port = atoi (str);
if (port == 0)
goto cleanup;
/* base-time */
if ((str = fields[3]) == NULL)
goto cleanup;
base_time = g_ascii_strtoull (str, NULL, 10);
netclock =
gst_net_client_clock_new ((gchar *) "GstRTSPClock", remote_ip, port,
base_time);
if (src->provided_clock)
gst_object_unref (src->provided_clock);
src->provided_clock = netclock;
gst_element_post_message (GST_ELEMENT_CAST (src),
gst_message_new_clock_provide (GST_OBJECT_CAST (src),
src->provided_clock, TRUE));
res = TRUE;
cleanup:
g_strfreev (fields);
g_strfreev (parts);
}
return res;
}
/* must be called with the RTSP state lock */
static GstRTSPResult
gst_rtspsrc_open_from_sdp (GstRTSPSrc * src, GstSDPMessage * sdp,
gboolean async)
{
GstRTSPResult res;
gint i, n_streams;
/* prepare global stream caps properties */
if (src->props)
gst_structure_remove_all_fields (src->props);
else
src->props = gst_structure_new_empty ("RTSPProperties");
if (src->debug)
gst_sdp_message_dump (sdp);
gst_rtsp_ext_list_parse_sdp (src->extensions, sdp, src->props);
/* let the app inspect and change the SDP */
g_signal_emit (src, gst_rtspsrc_signals[SIGNAL_ON_SDP], 0, sdp);
gst_segment_init (&src->segment, GST_FORMAT_TIME);
/* parse range for duration reporting. */
{
const gchar *range;
for (i = 0;; i++) {
range = gst_sdp_message_get_attribute_val_n (sdp, "range", i);
if (range == NULL)
break;
/* keep track of the range and configure it in the segment */
if (gst_rtspsrc_parse_range (src, range, &src->segment))
break;
}
}
/* parse clock information. This is GStreamer specific, a server can tell the
* client what clock it is using and wrap that in a network clock. The
* advantage of that is that we can slave to it. */
{
const gchar *gstclock;
for (i = 0;; i++) {
gstclock = gst_sdp_message_get_attribute_val_n (sdp, "x-gst-clock", i);
if (gstclock == NULL)
break;
/* parse the clock and expose it in the provide_clock method */
if (gst_rtspsrc_parse_gst_clock (src, gstclock))
break;
}
}
/* try to find a global control attribute. Note that a '*' means that we should
* do aggregate control with the current url (so we don't do anything and
* leave the current connection as is) */
{
const gchar *control;
for (i = 0;; i++) {
control = gst_sdp_message_get_attribute_val_n (sdp, "control", i);
if (control == NULL)
break;
/* only take fully qualified urls */
if (g_str_has_prefix (control, "rtsp://"))
break;
}
if (control) {
g_free (src->conninfo.location);
src->conninfo.location = g_strdup (control);
/* make a connection for this, if there was a connection already, nothing
* happens. */
if (gst_rtsp_conninfo_connect (src, &src->conninfo, async) < 0) {
GST_ERROR_OBJECT (src, "could not connect");
}
}
/* we need to keep the control url separate from the connection url because
* the rules for constructing the media control url need it */
g_free (src->control);
src->control = g_strdup (control);
}
/* create streams */
n_streams = gst_sdp_message_medias_len (sdp);
for (i = 0; i < n_streams; i++) {
gst_rtspsrc_create_stream (src, sdp, i);
}
src->state = GST_RTSP_STATE_INIT;
/* setup streams */
if ((res = gst_rtspsrc_setup_streams (src, async)) < 0)
goto setup_failed;
/* reset our state */
src->need_range = TRUE;
src->skip = FALSE;
src->state = GST_RTSP_STATE_READY;
return res;
/* ERRORS */
setup_failed:
{
GST_ERROR_OBJECT (src, "setup failed");
gst_rtspsrc_cleanup (src);
return res;
}
}
static GstRTSPResult
gst_rtspsrc_retrieve_sdp (GstRTSPSrc * src, GstSDPMessage ** sdp,
gboolean async)
{
GstRTSPResult res;
GstRTSPMessage request = { 0 };
GstRTSPMessage response = { 0 };
guint8 *data;
guint size;
gchar *respcont = NULL;
restart:
src->need_redirect = FALSE;
/* can't continue without a valid url */
if (G_UNLIKELY (src->conninfo.url == NULL)) {
res = GST_RTSP_EINVAL;
goto no_url;
}
src->tried_url_auth = FALSE;
if ((res = gst_rtsp_conninfo_connect (src, &src->conninfo, async)) < 0)
goto connect_failed;
/* create OPTIONS */
GST_DEBUG_OBJECT (src, "create options...");
res =
gst_rtsp_message_init_request (&request, GST_RTSP_OPTIONS,
src->conninfo.url_str);
if (res < 0)
goto create_request_failed;
/* send OPTIONS */
GST_DEBUG_OBJECT (src, "send options...");
if (async)
GST_ELEMENT_PROGRESS (src, CONTINUE, "open", ("Retrieving server options"));
if ((res =
gst_rtspsrc_send (src, src->conninfo.connection, &request, &response,
NULL)) < 0)
goto send_error;
/* parse OPTIONS */
if (!gst_rtspsrc_parse_methods (src, &response))
goto methods_error;
/* create DESCRIBE */
GST_DEBUG_OBJECT (src, "create describe...");
res =
gst_rtsp_message_init_request (&request, GST_RTSP_DESCRIBE,
src->conninfo.url_str);
if (res < 0)
goto create_request_failed;
/* we only accept SDP for now */
gst_rtsp_message_add_header (&request, GST_RTSP_HDR_ACCEPT,
"application/sdp");
/* send DESCRIBE */
GST_DEBUG_OBJECT (src, "send describe...");
if (async)
GST_ELEMENT_PROGRESS (src, CONTINUE, "open", ("Retrieving media info"));
if ((res =
gst_rtspsrc_send (src, src->conninfo.connection, &request, &response,
NULL)) < 0)
goto send_error;
/* we only perform redirect for the describe, currently */
if (src->need_redirect) {
/* close connection, we don't have to send a TEARDOWN yet, ignore the
* result. */
gst_rtsp_conninfo_close (src, &src->conninfo, TRUE);
gst_rtsp_message_unset (&request);
gst_rtsp_message_unset (&response);
/* and now retry */
goto restart;
}
/* it could be that the DESCRIBE method was not implemented */
if (!src->methods & GST_RTSP_DESCRIBE)
goto no_describe;
/* check if reply is SDP */
gst_rtsp_message_get_header (&response, GST_RTSP_HDR_CONTENT_TYPE, &respcont,
0);
/* could not be set but since the request returned OK, we assume it
* was SDP, else check it. */
if (respcont) {
if (g_ascii_strcasecmp (respcont, "application/sdp") != 0)
goto wrong_content_type;
}
/* get message body and parse as SDP */
gst_rtsp_message_get_body (&response, &data, &size);
if (data == NULL || size == 0)
goto no_describe;
GST_DEBUG_OBJECT (src, "parse SDP...");
gst_sdp_message_new (sdp);
gst_sdp_message_parse_buffer (data, size, *sdp);
/* clean up any messages */
gst_rtsp_message_unset (&request);
gst_rtsp_message_unset (&response);
return res;
/* ERRORS */
no_url:
{
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL),
("No valid RTSP URL was provided"));
goto cleanup_error;
}
connect_failed:
{
gchar *str = gst_rtsp_strresult (res);
if (res != GST_RTSP_EINTR) {
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
("Failed to connect. (%s)", str));
} else {
GST_WARNING_OBJECT (src, "connect interrupted");
}
g_free (str);
goto cleanup_error;
}
create_request_failed:
{
gchar *str = gst_rtsp_strresult (res);
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
("Could not create request. (%s)", str));
g_free (str);
goto cleanup_error;
}
send_error:
{
/* Don't post a message - the rtsp_send method will have
* taken care of it because we passed NULL for the response code */
goto cleanup_error;
}
methods_error:
{
/* error was posted */
res = GST_RTSP_ERROR;
goto cleanup_error;
}
wrong_content_type:
{
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Server does not support SDP, got %s.", respcont));
res = GST_RTSP_ERROR;
goto cleanup_error;
}
no_describe:
{
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Server can not provide an SDP."));
res = GST_RTSP_ERROR;
goto cleanup_error;
}
cleanup_error:
{
if (src->conninfo.connection) {
GST_DEBUG_OBJECT (src, "free connection");
gst_rtsp_conninfo_close (src, &src->conninfo, TRUE);
}
gst_rtsp_message_unset (&request);
gst_rtsp_message_unset (&response);
return res;
}
}
static GstRTSPResult
gst_rtspsrc_open (GstRTSPSrc * src, gboolean async)
{
GstRTSPResult ret;
src->methods =
GST_RTSP_SETUP | GST_RTSP_PLAY | GST_RTSP_PAUSE | GST_RTSP_TEARDOWN;
if (src->sdp == NULL) {
if ((ret = gst_rtspsrc_retrieve_sdp (src, &src->sdp, async)) < 0)
goto no_sdp;
}
if ((ret = gst_rtspsrc_open_from_sdp (src, src->sdp, async)) < 0)
goto open_failed;
done:
if (async)
gst_rtspsrc_loop_end_cmd (src, CMD_OPEN, ret);
return ret;
/* ERRORS */
no_sdp:
{
GST_WARNING_OBJECT (src, "can't get sdp");
src->open_error = TRUE;
goto done;
}
open_failed:
{
GST_WARNING_OBJECT (src, "can't setup streaming from sdp");
src->open_error = TRUE;
goto done;
}
}
static GstRTSPResult
gst_rtspsrc_close (GstRTSPSrc * src, gboolean async, gboolean only_close)
{
GstRTSPMessage request = { 0 };
GstRTSPMessage response = { 0 };
GstRTSPResult res = GST_RTSP_OK;
GList *walk;
const gchar *control;
GST_DEBUG_OBJECT (src, "TEARDOWN...");
gst_rtspsrc_set_state (src, GST_STATE_READY);
if (src->state < GST_RTSP_STATE_READY) {
GST_DEBUG_OBJECT (src, "not ready, doing cleanup");
goto close;
}
if (only_close)
goto close;
/* construct a control url */
control = get_aggregate_control (src);
if (!(src->methods & (GST_RTSP_PLAY | GST_RTSP_TEARDOWN)))
goto not_supported;
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
const gchar *setup_url;
GstRTSPConnInfo *info;
/* try aggregate control first but do non-aggregate control otherwise */
if (control)
setup_url = control;
else if ((setup_url = stream->conninfo.location) == NULL)
continue;
if (src->conninfo.connection) {
info = &src->conninfo;
} else if (stream->conninfo.connection) {
info = &stream->conninfo;
} else {
continue;
}
if (!info->connected)
goto next;
/* do TEARDOWN */
res =
gst_rtsp_message_init_request (&request, GST_RTSP_TEARDOWN, setup_url);
if (res < 0)
goto create_request_failed;
if (async)
GST_ELEMENT_PROGRESS (src, CONTINUE, "close", ("Closing stream"));
if ((res =
gst_rtspsrc_send (src, info->connection, &request, &response,
NULL)) < 0)
goto send_error;
/* FIXME, parse result? */
gst_rtsp_message_unset (&request);
gst_rtsp_message_unset (&response);
next:
/* early exit when we did aggregate control */
if (control)
break;
}
close:
/* close connections */
GST_DEBUG_OBJECT (src, "closing connection...");
gst_rtsp_conninfo_close (src, &src->conninfo, TRUE);
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
gst_rtsp_conninfo_close (src, &stream->conninfo, TRUE);
}
/* cleanup */
gst_rtspsrc_cleanup (src);
src->state = GST_RTSP_STATE_INVALID;
if (async)
gst_rtspsrc_loop_end_cmd (src, CMD_CLOSE, res);
return res;
/* ERRORS */
create_request_failed:
{
gchar *str = gst_rtsp_strresult (res);
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
("Could not create request. (%s)", str));
g_free (str);
goto close;
}
send_error:
{
gchar *str = gst_rtsp_strresult (res);
gst_rtsp_message_unset (&request);
if (res != GST_RTSP_EINTR) {
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not send message. (%s)", str));
} else {
GST_WARNING_OBJECT (src, "TEARDOWN interrupted");
}
g_free (str);
goto close;
}
not_supported:
{
GST_DEBUG_OBJECT (src,
"TEARDOWN and PLAY not supported, can't do TEARDOWN");
goto close;
}
}
/* RTP-Info is of the format:
*
* url=<URL>;[seq=<seqbase>;rtptime=<timebase>] [, url=...]
*
* rtptime corresponds to the timestamp for the NPT time given in the header
* seqbase corresponds to the next sequence number we received. This number
* indicates the first seqnum after the seek and should be used to discard
* packets that are from before the seek.
*/
static gboolean
gst_rtspsrc_parse_rtpinfo (GstRTSPSrc * src, gchar * rtpinfo)
{
gchar **infos;
gint i, j;
GST_DEBUG_OBJECT (src, "parsing RTP-Info %s", rtpinfo);
infos = g_strsplit (rtpinfo, ",", 0);
for (i = 0; infos[i]; i++) {
gchar **fields;
GstRTSPStream *stream;
gint32 seqbase;
gint64 timebase;
GST_DEBUG_OBJECT (src, "parsing info %s", infos[i]);
/* init values, types of seqbase and timebase are bigger than needed so we
* can store -1 as uninitialized values */
stream = NULL;
seqbase = -1;
timebase = -1;
/* parse url, find stream for url.
* parse seq and rtptime. The seq number should be configured in the rtp
* depayloader or session manager to detect gaps. Same for the rtptime, it
* should be used to create an initial time newsegment. */
fields = g_strsplit (infos[i], ";", 0);
for (j = 0; fields[j]; j++) {
GST_DEBUG_OBJECT (src, "parsing field %s", fields[j]);
/* remove leading whitespace */
fields[j] = g_strchug (fields[j]);
if (g_str_has_prefix (fields[j], "url=")) {
/* get the url and the stream */
stream =
find_stream (src, (fields[j] + 4), (gpointer) find_stream_by_setup);
} else if (g_str_has_prefix (fields[j], "seq=")) {
seqbase = atoi (fields[j] + 4);
} else if (g_str_has_prefix (fields[j], "rtptime=")) {
timebase = g_ascii_strtoll (fields[j] + 8, NULL, 10);
}
}
g_strfreev (fields);
/* now we need to store the values for the caps of the stream */
if (stream != NULL) {
GST_DEBUG_OBJECT (src,
"found stream %p, setting: seqbase %d, timebase %" G_GINT64_FORMAT,
stream, seqbase, timebase);
/* we have a stream, configure detected params */
stream->seqbase = seqbase;
stream->timebase = timebase;
}
}
g_strfreev (infos);
return TRUE;
}
static void
gst_rtspsrc_handle_rtcp_interval (GstRTSPSrc * src, gchar * rtcp)
{
guint64 interval;
GList *walk;
interval = strtoul (rtcp, NULL, 10);
GST_DEBUG_OBJECT (src, "rtcp interval: %" G_GUINT64_FORMAT " ms", interval);
if (!interval)
return;
interval *= GST_MSECOND;
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
/* already (optionally) retrieved this when configuring manager */
if (stream->session) {
GObject *rtpsession = stream->session;
GST_DEBUG_OBJECT (src, "configure rtcp interval in session %p",
rtpsession);
g_object_set (rtpsession, "rtcp-min-interval", interval, NULL);
}
}
/* now it happens that (Xenon) server sending this may also provide bogus
* RTCP SR sync data (i.e. with quite some jitter), so never mind those
* and just use RTP-Info to sync */
if (src->manager) {
GObjectClass *klass;
klass = G_OBJECT_GET_CLASS (G_OBJECT (src->manager));
if (g_object_class_find_property (klass, "rtcp-sync")) {
GST_DEBUG_OBJECT (src, "configuring rtp sync method");
g_object_set (src->manager, "rtcp-sync", RTCP_SYNC_RTP, NULL);
}
}
}
static gdouble
gst_rtspsrc_get_float (const gchar * dstr)
{
gchar s[G_ASCII_DTOSTR_BUF_SIZE] = { 0, };
/* canonicalise floating point string so we can handle float strings
* in the form "24.930" or "24,930" irrespective of the current locale */
g_strlcpy (s, dstr, sizeof (s));
g_strdelimit (s, ",", '.');
return g_ascii_strtod (s, NULL);
}
static gchar *
gen_range_header (GstRTSPSrc * src, GstSegment * segment)
{
gchar val_str[G_ASCII_DTOSTR_BUF_SIZE] = { 0, };
if (src->range && src->range->min.type == GST_RTSP_TIME_NOW) {
g_strlcpy (val_str, "now", sizeof (val_str));
} else {
if (segment->position == 0) {
g_strlcpy (val_str, "0", sizeof (val_str));
} else {
g_ascii_dtostr (val_str, sizeof (val_str),
((gdouble) segment->position) / GST_SECOND);
}
}
return g_strdup_printf ("npt=%s-", val_str);
}
static void
clear_rtp_base (GstRTSPSrc * src, GstRTSPStream * stream)
{
guint i, len;
stream->timebase = -1;
stream->seqbase = -1;
len = stream->ptmap->len;
for (i = 0; i < len; i++) {
PtMapItem *item = &g_array_index (stream->ptmap, PtMapItem, i);
GstStructure *s;
if (item->caps == NULL)
continue;
item->caps = gst_caps_make_writable (item->caps);
s = gst_caps_get_structure (item->caps, 0);
gst_structure_remove_fields (s, "clock-base", "seqnum-base", NULL);
}
}
static GstRTSPResult
gst_rtspsrc_ensure_open (GstRTSPSrc * src, gboolean async)
{
GstRTSPResult res = GST_RTSP_OK;
if (src->state < GST_RTSP_STATE_READY) {
res = GST_RTSP_ERROR;
if (src->open_error) {
GST_DEBUG_OBJECT (src, "the stream was in error");
goto done;
}
if (async)
gst_rtspsrc_loop_start_cmd (src, CMD_OPEN);
if ((res = gst_rtspsrc_open (src, async)) < 0) {
GST_DEBUG_OBJECT (src, "failed to open stream");
goto done;
}
}
done:
return res;
}
static GstRTSPResult
gst_rtspsrc_play (GstRTSPSrc * src, GstSegment * segment, gboolean async)
{
GstRTSPMessage request = { 0 };
GstRTSPMessage response = { 0 };
GstRTSPResult res = GST_RTSP_OK;
GList *walk;
gchar *hval;
gint hval_idx;
const gchar *control;
GST_DEBUG_OBJECT (src, "PLAY...");
if ((res = gst_rtspsrc_ensure_open (src, async)) < 0)
goto open_failed;
if (!(src->methods & GST_RTSP_PLAY))
goto not_supported;
if (src->state == GST_RTSP_STATE_PLAYING)
goto was_playing;
if (!src->conninfo.connection || !src->conninfo.connected)
goto done;
/* send some dummy packets before we activate the receive in the
* udp sources */
gst_rtspsrc_send_dummy_packets (src);
/* require new SR packets */
if (src->manager)
g_signal_emit_by_name (src->manager, "reset-sync", NULL);
/* construct a control url */
control = get_aggregate_control (src);
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
const gchar *setup_url;
GstRTSPConnection *conn;
/* try aggregate control first but do non-aggregate control otherwise */
if (control)
setup_url = control;
else if ((setup_url = stream->conninfo.location) == NULL)
continue;
if (src->conninfo.connection) {
conn = src->conninfo.connection;
} else if (stream->conninfo.connection) {
conn = stream->conninfo.connection;
} else {
continue;
}
/* do play */
res = gst_rtsp_message_init_request (&request, GST_RTSP_PLAY, setup_url);
if (res < 0)
goto create_request_failed;
if (src->need_range) {
hval = gen_range_header (src, segment);
gst_rtsp_message_take_header (&request, GST_RTSP_HDR_RANGE, hval);
/* store the newsegment event so it can be sent from the streaming thread. */
src->need_segment = TRUE;
}
if (segment->rate != 1.0) {
gchar hval[G_ASCII_DTOSTR_BUF_SIZE];
g_ascii_dtostr (hval, sizeof (hval), segment->rate);
if (src->skip)
gst_rtsp_message_add_header (&request, GST_RTSP_HDR_SCALE, hval);
else
gst_rtsp_message_add_header (&request, GST_RTSP_HDR_SPEED, hval);
}
if (async)
GST_ELEMENT_PROGRESS (src, CONTINUE, "request", ("Sending PLAY request"));
if ((res = gst_rtspsrc_send (src, conn, &request, &response, NULL)) < 0)
goto send_error;
/* seek may have silently failed as it is not supported */
if (!(src->methods & GST_RTSP_PLAY)) {
GST_DEBUG_OBJECT (src, "PLAY Range not supported; re-enable PLAY");
/* obviously it is supported as we made it here */
src->methods |= GST_RTSP_PLAY;
src->seekable = FALSE;
/* but there is nothing to parse in the response,
* so convey we have no idea and not to expect anything particular */
clear_rtp_base (src, stream);
if (control) {
GList *run;
/* need to do for all streams */
for (run = src->streams; run; run = g_list_next (run))
clear_rtp_base (src, (GstRTSPStream *) run->data);
}
/* NOTE the above also disables npt based eos detection */
/* and below forces position to 0,
* which is visible feedback we lost the plot */
segment->start = segment->position = src->last_pos;
}
gst_rtsp_message_unset (&request);
/* parse RTP npt field. This is the current position in the stream (Normal
* Play Time) and should be put in the NEWSEGMENT position field. */
if (gst_rtsp_message_get_header (&response, GST_RTSP_HDR_RANGE, &hval,
0) == GST_RTSP_OK)
gst_rtspsrc_parse_range (src, hval, segment);
/* assume 1.0 rate now, overwrite when the SCALE or SPEED headers are present. */
segment->rate = 1.0;
/* parse Speed header. This is the intended playback rate of the stream
* and should be put in the NEWSEGMENT rate field. */
if (gst_rtsp_message_get_header (&response, GST_RTSP_HDR_SPEED, &hval,
0) == GST_RTSP_OK) {
segment->rate = gst_rtspsrc_get_float (hval);
} else if (gst_rtsp_message_get_header (&response, GST_RTSP_HDR_SCALE,
&hval, 0) == GST_RTSP_OK) {
segment->rate = gst_rtspsrc_get_float (hval);
}
/* parse the RTP-Info header field (if ANY) to get the base seqnum and timestamp
* for the RTP packets. If this is not present, we assume all starts from 0...
* This is info for the RTP session manager that we pass to it in caps. */
hval_idx = 0;
while (gst_rtsp_message_get_header (&response, GST_RTSP_HDR_RTP_INFO,
&hval, hval_idx++) == GST_RTSP_OK)
gst_rtspsrc_parse_rtpinfo (src, hval);
/* some servers indicate RTCP parameters in PLAY response,
* rather than properly in SDP */
if (gst_rtsp_message_get_header (&response, GST_RTSP_HDR_RTCP_INTERVAL,
&hval, 0) == GST_RTSP_OK)
gst_rtspsrc_handle_rtcp_interval (src, hval);
gst_rtsp_message_unset (&response);
/* early exit when we did aggregate control */
if (control)
break;
}
/* configure the caps of the streams after we parsed all headers. Only reset
* the manager object when we set a new Range header (we did a seek) */
gst_rtspsrc_configure_caps (src, segment, src->need_range);
/* set to PLAYING after we have configured the caps, otherwise we
* might end up calling request_key (with SRTP) while caps are still
* being configured. */
gst_rtspsrc_set_state (src, GST_STATE_PLAYING);
/* set again when needed */
src->need_range = FALSE;
src->running = TRUE;
src->base_time = -1;
src->state = GST_RTSP_STATE_PLAYING;
/* mark discont */
GST_DEBUG_OBJECT (src, "mark DISCONT, we did a seek to another position");
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
stream->discont = TRUE;
}
done:
if (async)
gst_rtspsrc_loop_end_cmd (src, CMD_PLAY, res);
return res;
/* ERRORS */
open_failed:
{
GST_DEBUG_OBJECT (src, "failed to open stream");
goto done;
}
not_supported:
{
GST_DEBUG_OBJECT (src, "PLAY is not supported");
goto done;
}
was_playing:
{
GST_DEBUG_OBJECT (src, "we were already PLAYING");
goto done;
}
create_request_failed:
{
gchar *str = gst_rtsp_strresult (res);
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
("Could not create request. (%s)", str));
g_free (str);
goto done;
}
send_error:
{
gchar *str = gst_rtsp_strresult (res);
gst_rtsp_message_unset (&request);
if (res != GST_RTSP_EINTR) {
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not send message. (%s)", str));
} else {
GST_WARNING_OBJECT (src, "PLAY interrupted");
}
g_free (str);
goto done;
}
}
static GstRTSPResult
gst_rtspsrc_pause (GstRTSPSrc * src, gboolean async)
{
GstRTSPResult res = GST_RTSP_OK;
GstRTSPMessage request = { 0 };
GstRTSPMessage response = { 0 };
GList *walk;
const gchar *control;
GST_DEBUG_OBJECT (src, "PAUSE...");
if ((res = gst_rtspsrc_ensure_open (src, async)) < 0)
goto open_failed;
if (!(src->methods & GST_RTSP_PAUSE))
goto not_supported;
if (src->state == GST_RTSP_STATE_READY)
goto was_paused;
if (!src->conninfo.connection || !src->conninfo.connected)
goto no_connection;
/* construct a control url */
control = get_aggregate_control (src);
/* loop over the streams. We might exit the loop early when we could do an
* aggregate control */
for (walk = src->streams; walk; walk = g_list_next (walk)) {
GstRTSPStream *stream = (GstRTSPStream *) walk->data;
GstRTSPConnection *conn;
const gchar *setup_url;
/* try aggregate control first but do non-aggregate control otherwise */
if (control)
setup_url = control;
else if ((setup_url = stream->conninfo.location) == NULL)
continue;
if (src->conninfo.connection) {
conn = src->conninfo.connection;
} else if (stream->conninfo.connection) {
conn = stream->conninfo.connection;
} else {
continue;
}
if (async)
GST_ELEMENT_PROGRESS (src, CONTINUE, "request",
("Sending PAUSE request"));
if ((res =
gst_rtsp_message_init_request (&request, GST_RTSP_PAUSE,
setup_url)) < 0)
goto create_request_failed;
if ((res = gst_rtspsrc_send (src, conn, &request, &response, NULL)) < 0)
goto send_error;
gst_rtsp_message_unset (&request);
gst_rtsp_message_unset (&response);
/* exit early when we did agregate control */
if (control)
break;
}
/* change element states now */
gst_rtspsrc_set_state (src, GST_STATE_PAUSED);
no_connection:
src->state = GST_RTSP_STATE_READY;
done:
if (async)
gst_rtspsrc_loop_end_cmd (src, CMD_PAUSE, res);
return res;
/* ERRORS */
open_failed:
{
GST_DEBUG_OBJECT (src, "failed to open stream");
goto done;
}
not_supported:
{
GST_DEBUG_OBJECT (src, "PAUSE is not supported");
goto done;
}
was_paused:
{
GST_DEBUG_OBJECT (src, "we were already PAUSED");
goto done;
}
create_request_failed:
{
gchar *str = gst_rtsp_strresult (res);
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
("Could not create request. (%s)", str));
g_free (str);
goto done;
}
send_error:
{
gchar *str = gst_rtsp_strresult (res);
gst_rtsp_message_unset (&request);
if (res != GST_RTSP_EINTR) {
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not send message. (%s)", str));
} else {
GST_WARNING_OBJECT (src, "PAUSE interrupted");
}
g_free (str);
goto done;
}
}
static void
gst_rtspsrc_handle_message (GstBin * bin, GstMessage * message)
{
GstRTSPSrc *rtspsrc;
rtspsrc = GST_RTSPSRC (bin);
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_EOS:
gst_message_unref (message);
break;
case GST_MESSAGE_ELEMENT:
{
const GstStructure *s = gst_message_get_structure (message);
if (gst_structure_has_name (s, "GstUDPSrcTimeout")) {
gboolean ignore_timeout;
GST_DEBUG_OBJECT (bin, "timeout on UDP port");
GST_OBJECT_LOCK (rtspsrc);
ignore_timeout = rtspsrc->ignore_timeout;
rtspsrc->ignore_timeout = TRUE;
GST_OBJECT_UNLOCK (rtspsrc);
/* we only act on the first udp timeout message, others are irrelevant
* and can be ignored. */
if (!ignore_timeout)
gst_rtspsrc_loop_send_cmd (rtspsrc, CMD_RECONNECT, CMD_LOOP);
/* eat and free */
gst_message_unref (message);
return;
}
GST_BIN_CLASS (parent_class)->handle_message (bin, message);
break;
}
case GST_MESSAGE_ERROR:
{
GstObject *udpsrc;
GstRTSPStream *stream;
GstFlowReturn ret;
udpsrc = GST_MESSAGE_SRC (message);
GST_DEBUG_OBJECT (rtspsrc, "got error from %s",
GST_ELEMENT_NAME (udpsrc));
stream = find_stream (rtspsrc, udpsrc, (gpointer) find_stream_by_udpsrc);
if (!stream)
goto forward;
/* we ignore the RTCP udpsrc */
if (stream->udpsrc[1] == GST_ELEMENT_CAST (udpsrc))
goto done;
/* if we get error messages from the udp sources, that's not a problem as
* long as not all of them error out. We also don't really know what the
* problem is, the message does not give enough detail... */
ret = gst_rtspsrc_combine_flows (rtspsrc, stream, GST_FLOW_NOT_LINKED);
GST_DEBUG_OBJECT (rtspsrc, "combined flows: %s", gst_flow_get_name (ret));
if (ret != GST_FLOW_OK)
goto forward;
done:
gst_message_unref (message);
break;
forward:
/* fatal but not our message, forward */
GST_BIN_CLASS (parent_class)->handle_message (bin, message);
break;
}
default:
{
GST_BIN_CLASS (parent_class)->handle_message (bin, message);
break;
}
}
}
/* the thread where everything happens */
static void
gst_rtspsrc_thread (GstRTSPSrc * src)
{
gint cmd;
GST_OBJECT_LOCK (src);
cmd = src->pending_cmd;
if (cmd == CMD_RECONNECT || cmd == CMD_PLAY || cmd == CMD_PAUSE
|| cmd == CMD_LOOP || cmd == CMD_OPEN)
src->pending_cmd = CMD_LOOP;
else
src->pending_cmd = CMD_WAIT;
GST_DEBUG_OBJECT (src, "got command %s", cmd_to_string (cmd));
/* we got the message command, so ensure communication is possible again */
gst_rtspsrc_connection_flush (src, FALSE);
src->busy_cmd = cmd;
GST_OBJECT_UNLOCK (src);
switch (cmd) {
case CMD_OPEN:
gst_rtspsrc_open (src, TRUE);
break;
case CMD_PLAY:
gst_rtspsrc_play (src, &src->segment, TRUE);
break;
case CMD_PAUSE:
gst_rtspsrc_pause (src, TRUE);
break;
case CMD_CLOSE:
gst_rtspsrc_close (src, TRUE, FALSE);
break;
case CMD_LOOP:
gst_rtspsrc_loop (src);
break;
case CMD_RECONNECT:
gst_rtspsrc_reconnect (src, FALSE);
break;
default:
break;
}
GST_OBJECT_LOCK (src);
/* and go back to sleep */
if (src->pending_cmd == CMD_WAIT) {
if (src->task)
gst_task_pause (src->task);
}
/* reset waiting */
src->busy_cmd = CMD_WAIT;
GST_OBJECT_UNLOCK (src);
}
static gboolean
gst_rtspsrc_start (GstRTSPSrc * src)
{
GST_DEBUG_OBJECT (src, "starting");
GST_OBJECT_LOCK (src);
src->pending_cmd = CMD_WAIT;
if (src->task == NULL) {
src->task = gst_task_new ((GstTaskFunction) gst_rtspsrc_thread, src, NULL);
if (src->task == NULL)
goto task_error;
gst_task_set_lock (src->task, GST_RTSP_STREAM_GET_LOCK (src));
}
GST_OBJECT_UNLOCK (src);
return TRUE;
/* ERRORS */
task_error:
{
GST_OBJECT_UNLOCK (src);
GST_ERROR_OBJECT (src, "failed to create task");
return FALSE;
}
}
static gboolean
gst_rtspsrc_stop (GstRTSPSrc * src)
{
GstTask *task;
GST_DEBUG_OBJECT (src, "stopping");
/* also cancels pending task */
gst_rtspsrc_loop_send_cmd (src, CMD_WAIT, CMD_ALL);
GST_OBJECT_LOCK (src);
if ((task = src->task)) {
src->task = NULL;
GST_OBJECT_UNLOCK (src);
gst_task_stop (task);
/* make sure it is not running */
GST_RTSP_STREAM_LOCK (src);
GST_RTSP_STREAM_UNLOCK (src);
/* now wait for the task to finish */
gst_task_join (task);
/* and free the task */
gst_object_unref (GST_OBJECT (task));
GST_OBJECT_LOCK (src);
}
GST_OBJECT_UNLOCK (src);
/* ensure synchronously all is closed and clean */
gst_rtspsrc_close (src, FALSE, TRUE);
return TRUE;
}
static GstStateChangeReturn
gst_rtspsrc_change_state (GstElement * element, GstStateChange transition)
{
GstRTSPSrc *rtspsrc;
GstStateChangeReturn ret;
rtspsrc = GST_RTSPSRC (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
if (!gst_rtspsrc_start (rtspsrc))
goto start_failed;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
/* init some state */
rtspsrc->cur_protocols = rtspsrc->protocols;
/* first attempt, don't ignore timeouts */
rtspsrc->ignore_timeout = FALSE;
rtspsrc->open_error = FALSE;
gst_rtspsrc_loop_send_cmd (rtspsrc, CMD_OPEN, 0);
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
set_manager_buffer_mode (rtspsrc);
/* fall-through */
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
/* unblock the tcp tasks and make the loop waiting */
if (gst_rtspsrc_loop_send_cmd (rtspsrc, CMD_WAIT, CMD_LOOP)) {
/* make sure it is waiting before we send PAUSE or PLAY below */
GST_RTSP_STREAM_LOCK (rtspsrc);
GST_RTSP_STREAM_UNLOCK (rtspsrc);
}
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
if (ret == GST_STATE_CHANGE_FAILURE)
goto done;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
ret = GST_STATE_CHANGE_SUCCESS;
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
ret = GST_STATE_CHANGE_NO_PREROLL;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
gst_rtspsrc_loop_send_cmd (rtspsrc, CMD_PLAY, 0);
ret = GST_STATE_CHANGE_SUCCESS;
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
/* send pause request and keep the idle task around */
gst_rtspsrc_loop_send_cmd (rtspsrc, CMD_PAUSE, CMD_LOOP);
ret = GST_STATE_CHANGE_NO_PREROLL;
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_rtspsrc_loop_send_cmd (rtspsrc, CMD_CLOSE, CMD_PAUSE);
ret = GST_STATE_CHANGE_SUCCESS;
break;
case GST_STATE_CHANGE_READY_TO_NULL:
gst_rtspsrc_stop (rtspsrc);
ret = GST_STATE_CHANGE_SUCCESS;
break;
default:
break;
}
done:
return ret;
start_failed:
{
GST_DEBUG_OBJECT (rtspsrc, "start failed");
return GST_STATE_CHANGE_FAILURE;
}
}
static gboolean
gst_rtspsrc_send_event (GstElement * element, GstEvent * event)
{
gboolean res;
GstRTSPSrc *rtspsrc;
rtspsrc = GST_RTSPSRC (element);
if (GST_EVENT_IS_DOWNSTREAM (event)) {
res = gst_rtspsrc_push_event (rtspsrc, event);
} else {
res = GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
}
return res;
}
/*** GSTURIHANDLER INTERFACE *************************************************/
static GstURIType
gst_rtspsrc_uri_get_type (GType type)
{
return GST_URI_SRC;
}
static const gchar *const *
gst_rtspsrc_uri_get_protocols (GType type)
{
static const gchar *protocols[] =
{ "rtsp", "rtspu", "rtspt", "rtsph", "rtsp-sdp",
"rtsps", "rtspsu", "rtspst", "rtspsh", NULL
};
return protocols;
}
static gchar *
gst_rtspsrc_uri_get_uri (GstURIHandler * handler)
{
GstRTSPSrc *src = GST_RTSPSRC (handler);
/* FIXME: make thread-safe */
return g_strdup (src->conninfo.location);
}
static gboolean
gst_rtspsrc_uri_set_uri (GstURIHandler * handler, const gchar * uri,
GError ** error)
{
GstRTSPSrc *src;
GstRTSPResult res;
GstSDPResult sres;
GstRTSPUrl *newurl = NULL;
GstSDPMessage *sdp = NULL;
src = GST_RTSPSRC (handler);
/* same URI, we're fine */
if (src->conninfo.location && uri && !strcmp (uri, src->conninfo.location))
goto was_ok;
if (g_str_has_prefix (uri, "rtsp-sdp://")) {
sres = gst_sdp_message_new (&sdp);
if (sres < 0)
goto sdp_failed;
GST_DEBUG_OBJECT (src, "parsing SDP message");
sres = gst_sdp_message_parse_uri (uri, sdp);
if (sres < 0)
goto invalid_sdp;
} else {
/* try to parse */
GST_DEBUG_OBJECT (src, "parsing URI");
if ((res = gst_rtsp_url_parse (uri, &newurl)) < 0)
goto parse_error;
}
/* if worked, free previous and store new url object along with the original
* location. */
GST_DEBUG_OBJECT (src, "configuring URI");
g_free (src->conninfo.location);
src->conninfo.location = g_strdup (uri);
gst_rtsp_url_free (src->conninfo.url);
src->conninfo.url = newurl;
g_free (src->conninfo.url_str);
if (newurl)
src->conninfo.url_str = gst_rtsp_url_get_request_uri (src->conninfo.url);
else
src->conninfo.url_str = NULL;
if (src->sdp)
gst_sdp_message_free (src->sdp);
src->sdp = sdp;
src->from_sdp = sdp != NULL;
GST_DEBUG_OBJECT (src, "set uri: %s", GST_STR_NULL (uri));
GST_DEBUG_OBJECT (src, "request uri is: %s",
GST_STR_NULL (src->conninfo.url_str));
return TRUE;
/* Special cases */
was_ok:
{
GST_DEBUG_OBJECT (src, "URI was ok: '%s'", GST_STR_NULL (uri));
return TRUE;
}
sdp_failed:
{
GST_ERROR_OBJECT (src, "Could not create new SDP (%d)", sres);
g_set_error_literal (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
"Could not create SDP");
return FALSE;
}
invalid_sdp:
{
GST_ERROR_OBJECT (src, "Not a valid SDP (%d) '%s'", sres,
GST_STR_NULL (uri));
gst_sdp_message_free (sdp);
g_set_error_literal (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
"Invalid SDP");
return FALSE;
}
parse_error:
{
GST_ERROR_OBJECT (src, "Not a valid RTSP url '%s' (%d)",
GST_STR_NULL (uri), res);
g_set_error_literal (error, GST_URI_ERROR, GST_URI_ERROR_BAD_URI,
"Invalid RTSP URI");
return FALSE;
}
}
static void
gst_rtspsrc_uri_handler_init (gpointer g_iface, gpointer iface_data)
{
GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
iface->get_type = gst_rtspsrc_uri_get_type;
iface->get_protocols = gst_rtspsrc_uri_get_protocols;
iface->get_uri = gst_rtspsrc_uri_get_uri;
iface->set_uri = gst_rtspsrc_uri_set_uri;
}
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