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gstreamer/gst/rtsp/gstrtspsrc.c
Wim Taymans 86a4c1c6b0 gst/rtsp/gstrtpdec.*: Make backward compat with rtpbin by adding the request-pt-map signals. 
Original commit message from CVS:
* gst/rtsp/gstrtpdec.c: (gst_rtp_dec_marshal_BOXED__UINT_UINT),
(gst_rtp_dec_class_init), (gst_rtp_dec_chain_rtp):
* gst/rtsp/gstrtpdec.h:
Make backward compat with rtpbin by adding the request-pt-map signals.
* gst/rtsp/gstrtspsrc.c: (gst_rtspsrc_create_stream),
(new_session_pad), (request_pt_map),
(gst_rtspsrc_stream_configure_transport),
(gst_rtspsrc_stream_configure_caps),
(gst_rtspsrc_activate_streams):
* gst/rtsp/gstrtspsrc.h:
Implement request-pt-map signals instead of setting caps on the buffers
for the session manager.
2007-04-12 08:21:28 +00:00

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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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, 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
*
* <refsect2>
* <para>
* 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.
* </para>
* <para>
* 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 "protocols" property.
* </para>
* <para>
* 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.
* </para>
* <para>
* 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 however currently not yet implemented.
* </para>
* <para>
* rtspsrc acts like a live source and will therefore only generate data in the
* PLAYING state.
* </para>
* <title>Example launch line</title>
* <para>
* <programlisting>
* gst-launch rtspsrc location=rtsp://some.server/url ! fakesink
* </programlisting>
* Establish a connection to an RTSP server and send the raw RTP packets to a fakesink.
* </para>
* </refsect2>
*
* Last reviewed on 2006-08-18 (0.10.5)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include "gstrtspsrc.h"
#include "sdp.h"
/* define for experimental real support */
#undef WITH_EXT_REAL
#include "rtspextwms.h"
#ifdef WITH_EXT_REAL
#include "rtspextreal.h"
#endif
GST_DEBUG_CATEGORY_STATIC (rtspsrc_debug);
#define GST_CAT_DEFAULT (rtspsrc_debug)
/* elementfactory information */
static const GstElementDetails gst_rtspsrc_details =
GST_ELEMENT_DETAILS ("RTSP packet receiver",
"Source/Network",
"Receive data over the network via RTSP (RFC 2326)",
"Wim Taymans <wim@fluendo.com>\n"
"Thijs Vermeir <thijs.vermeir@barco.com>\n"
"Lutz Mueller <lutz@topfrose.de>");
static GstStaticPadTemplate rtptemplate = GST_STATIC_PAD_TEMPLATE ("stream%d",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS ("application/x-rtp; application/x-rdt"));
enum
{
/* FILL ME */
LAST_SIGNAL
};
#define DEFAULT_LOCATION NULL
#define DEFAULT_PROTOCOLS RTSP_LOWER_TRANS_UDP | RTSP_LOWER_TRANS_UDP_MCAST | RTSP_LOWER_TRANS_TCP
#define DEFAULT_DEBUG FALSE
#define DEFAULT_RETRY 20
#define DEFAULT_TIMEOUT 5000000
enum
{
PROP_0,
PROP_LOCATION,
PROP_PROTOCOLS,
PROP_DEBUG,
PROP_RETRY,
PROP_TIMEOUT,
};
#define GST_TYPE_RTSP_LOWER_TRANS (gst_rtsp_lower_trans_get_type())
static GType
gst_rtsp_lower_trans_get_type (void)
{
static GType rtsp_lower_trans_type = 0;
static const GFlagsValue rtsp_lower_trans[] = {
{RTSP_LOWER_TRANS_UDP, "UDP Unicast Mode", "udp-unicast"},
{RTSP_LOWER_TRANS_UDP_MCAST, "UDP Multicast Mode", "udp-multicast"},
{RTSP_LOWER_TRANS_TCP, "TCP interleaved mode", "tcp"},
{0, NULL, NULL},
};
if (!rtsp_lower_trans_type) {
rtsp_lower_trans_type =
g_flags_register_static ("GstRTSPLowerTrans", rtsp_lower_trans);
}
return rtsp_lower_trans_type;
}
static void gst_rtspsrc_base_init (gpointer g_class);
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 void gst_rtspsrc_uri_handler_init (gpointer g_iface,
gpointer iface_data);
static GstCaps *gst_rtspsrc_media_to_caps (gint pt, SDPMedia * media);
static GstStateChangeReturn gst_rtspsrc_change_state (GstElement * element,
GstStateChange transition);
static void gst_rtspsrc_handle_message (GstBin * bin, GstMessage * message);
static gboolean gst_rtspsrc_setup_auth (GstRTSPSrc * src,
RTSPMessage * response);
static gboolean gst_rtspsrc_try_send (GstRTSPSrc * src, RTSPMessage * request,
RTSPMessage * response, RTSPStatusCode * code);
static gboolean gst_rtspsrc_open (GstRTSPSrc * src);
static gboolean gst_rtspsrc_play (GstRTSPSrc * src);
static gboolean gst_rtspsrc_pause (GstRTSPSrc * src);
static gboolean gst_rtspsrc_close (GstRTSPSrc * src);
static gboolean gst_rtspsrc_uri_set_uri (GstURIHandler * handler,
const gchar * uri);
static gboolean gst_rtspsrc_activate_streams (GstRTSPSrc * src);
static void gst_rtspsrc_loop (GstRTSPSrc * src);
/* commands we send to out loop to notify it of events */
#define CMD_WAIT 0
#define CMD_RECONNECT 1
#define CMD_STOP 2
/*static guint gst_rtspsrc_signals[LAST_SIGNAL] = { 0 }; */
static void
_do_init (GType rtspsrc_type)
{
static const GInterfaceInfo urihandler_info = {
gst_rtspsrc_uri_handler_init,
NULL,
NULL
};
GST_DEBUG_CATEGORY_INIT (rtspsrc_debug, "rtspsrc", 0, "RTSP src");
g_type_add_interface_static (rtspsrc_type, GST_TYPE_URI_HANDLER,
&urihandler_info);
}
GST_BOILERPLATE_FULL (GstRTSPSrc, gst_rtspsrc, GstBin, GST_TYPE_BIN, _do_init);
static void
gst_rtspsrc_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&rtptemplate));
gst_element_class_set_details (element_class, &gst_rtspsrc_details);
}
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;
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_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_CONSTRUCT));
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_CONSTRUCT));
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_CONSTRUCT));
g_object_class_install_property (gobject_class, PROP_TIMEOUT,
g_param_spec_uint64 ("timeout", "Timeout",
"Retry TCP transport after timeout microseconds (0 = disabled)",
0, G_MAXUINT64, DEFAULT_TIMEOUT,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
gstelement_class->change_state = gst_rtspsrc_change_state;
gstbin_class->handle_message = gst_rtspsrc_handle_message;
}
static void
gst_rtspsrc_init (GstRTSPSrc * src, GstRTSPSrcClass * g_class)
{
src->stream_rec_lock = g_new (GStaticRecMutex, 1);
g_static_rec_mutex_init (src->stream_rec_lock);
src->loop_cond = g_cond_new ();
src->location = g_strdup (DEFAULT_LOCATION);
src->url = NULL;
#ifdef WITH_EXT_REAL
src->extension = rtsp_ext_real_get_context ();
#else
/* install WMS extension by default */
src->extension = rtsp_ext_wms_get_context ();
#endif
src->extension->src = (gpointer) src;
}
static void
gst_rtspsrc_finalize (GObject * object)
{
GstRTSPSrc *rtspsrc;
rtspsrc = GST_RTSPSRC (object);
g_static_rec_mutex_free (rtspsrc->stream_rec_lock);
g_free (rtspsrc->stream_rec_lock);
g_cond_free (rtspsrc->loop_cond);
g_free (rtspsrc->location);
g_free (rtspsrc->req_location);
g_free (rtspsrc->content_base);
rtsp_url_free (rtspsrc->url);
if (rtspsrc->extension) {
#ifdef WITH_EXT_REAL
rtsp_ext_real_free_context (rtspsrc->extension);
#else
rtsp_ext_wms_free_context (rtspsrc->extension);
#endif
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
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));
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->timeout = g_value_get_uint64 (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->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->timeout);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gint
find_stream_by_id (GstRTSPStream * stream, gconstpointer a)
{
gint id = GPOINTER_TO_INT (a);
if (stream->id == id)
return 0;
return -1;
}
static gint
find_stream_by_channel (GstRTSPStream * stream, gconstpointer a)
{
gint channel = GPOINTER_TO_INT (a);
if (stream->channel[0] == channel || stream->channel[1] == channel)
return 0;
return -1;
}
static gint
find_stream_by_pt (GstRTSPStream * stream, gconstpointer a)
{
gint pt = GPOINTER_TO_INT (a);
if (stream->pt == pt)
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)
{
/* check qualified setup_url */
if (!strcmp (stream->setup_url, (gchar *) a))
return 0;
/* 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 *
gst_rtspsrc_create_stream (GstRTSPSrc * src, SDPMessage * sdp, gint idx)
{
GstRTSPStream *stream;
gchar *control_url;
gchar *payload;
SDPMedia *media;
/* get media, should not return NULL */
media = 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->id = src->numstreams++;
/* we must have a payload. No payload means we cannot create caps */
/* FIXME, handle multiple formats. */
if ((payload = sdp_media_get_format (media, 0))) {
stream->pt = atoi (payload);
/* convert caps */
stream->caps = gst_rtspsrc_media_to_caps (stream->pt, media);
if (stream->pt >= 96) {
/* If we have a dynamic payload type, see if we have a stream with the
* same payload number. If there is one, they are part of the same
* container and we only need to add one pad. */
if (g_list_find_custom (src->streams, GINT_TO_POINTER (stream->pt),
(GCompareFunc) find_stream_by_pt)) {
stream->container = TRUE;
}
}
}
/* 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 = sdp_media_get_attribute_val (media, "control");
GST_DEBUG_OBJECT (src, "stream %d", stream->id);
GST_DEBUG_OBJECT (src, " pt: %d", stream->pt);
GST_DEBUG_OBJECT (src, " container: %d", stream->container);
GST_DEBUG_OBJECT (src, " caps: %" GST_PTR_FORMAT, stream->caps);
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->setup_url = g_strdup (control_url);
else if (src->content_base)
stream->setup_url =
g_strdup_printf ("%s%s", src->content_base, control_url);
else
stream->setup_url =
g_strdup_printf ("%s/%s", src->req_location, control_url);
}
GST_DEBUG_OBJECT (src, " setup: %s", GST_STR_NULL (stream->setup_url));
/* 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);
if (stream->caps)
gst_caps_unref (stream->caps);
g_free (stream->control_url);
g_free (stream->setup_url);
for (i = 0; i < 2; i++) {
GstElement *udpsrc = stream->udpsrc[i];
if (udpsrc) {
GstPad *pad;
/* unlink the pad */
pad = gst_element_get_pad (udpsrc, "src");
if (stream->channelpad[i]) {
gst_pad_unlink (pad, stream->channelpad[i]);
gst_object_unref (stream->channelpad[i]);
stream->channelpad[i] = NULL;
}
gst_element_set_state (udpsrc, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (src), udpsrc);
gst_object_unref (stream->udpsrc[i]);
stream->udpsrc[i] = NULL;
}
}
if (stream->srcpad) {
gst_pad_set_active (stream->srcpad, FALSE);
if (stream->added) {
gst_element_remove_pad (GST_ELEMENT_CAST (src), stream->srcpad);
stream->added = FALSE;
}
stream->srcpad = NULL;
}
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->session) {
if (src->session_sig_id) {
g_signal_handler_disconnect (src->session, src->session_sig_id);
src->session_sig_id = 0;
}
gst_element_set_state (src->session, GST_STATE_NULL);
gst_bin_remove (GST_BIN_CAST (src), src->session);
src->session = NULL;
}
src->numstreams = 0;
if (src->props)
gst_structure_free (src->props);
src->props = NULL;
}
/* FIXME, this should go somewhere else, ideally
*/
static guint
get_default_rate_for_pt (gint pt)
{
switch (pt) {
case 0:
case 3:
case 4:
case 5:
case 7:
case 8:
case 9:
case 12:
case 13:
case 15:
case 18:
return 8000;
case 16:
return 11025;
case 17:
return 22050;
case 6:
return 16000;
case 10:
case 11:
return 44100;
case 14:
case 25:
case 26:
case 28:
case 31:
case 32:
case 33:
case 34:
return 90000;
default:
return -1;
}
}
#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; \
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 (gchar * rtpmap, gint * payload, gchar ** name,
gint * rate, gchar ** params)
{
gchar *p, *t;
t = p = 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) {
/* no rate, assume -1 then */
*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;
}
/*
* Mapping of caps to and from SDP fields:
*
* m=<media> <UDP port> RTP/AVP <payload>
* a=rtpmap:<payload> <encoding_name>/<clock_rate>[/<encoding_params>]
* a=fmtp:<payload> <param>[=<value>];...
*/
static GstCaps *
gst_rtspsrc_media_to_caps (gint pt, SDPMedia * media)
{
GstCaps *caps;
gchar *rtpmap;
gchar *fmtp;
gchar *name = NULL;
gint rate = -1;
gchar *params = NULL;
gchar *tmp;
GstStructure *s;
gint payload = 0;
gboolean ret;
/* get and parse rtpmap */
if ((rtpmap = sdp_media_get_attribute_val (media, "rtpmap"))) {
ret = gst_rtspsrc_parse_rtpmap (rtpmap, &payload, &name, &rate, &params);
if (ret) {
if (payload != pt) {
/* we ignore the rtpmap if the payload type is different. */
g_warning ("rtpmap of wrong payload type, ignoring");
name = NULL;
rate = -1;
params = NULL;
}
} else {
/* if we failed to parse the rtpmap for a dynamic payload type, we have an
* error */
if (pt >= 96)
goto no_rtpmap;
/* else we can ignore */
g_warning ("error parsing rtpmap, ignoring");
}
} else {
/* dynamic payloads need rtpmap or we fail */
if (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) {
rate = get_default_rate_for_pt (pt);
/* 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);
if (rate != -1)
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 = sdp_media_get_attribute_val (media, "fmtp"))) {
gchar *p;
gint payload = 0;
p = 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;
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 ';'. FIXME, strip? */
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);
}
}
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 *tmp, *udpsrc0, *udpsrc1;
gint tmp_rtp, tmp_rtcp;
guint count;
src = stream->parent;
tmp = NULL;
udpsrc0 = NULL;
udpsrc1 = NULL;
count = 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:
udpsrc0 = gst_element_make_from_uri (GST_URI_SRC, "udp://0.0.0.0:0", NULL);
if (udpsrc0 == NULL)
goto no_udp_protocol;
ret = gst_element_set_state (udpsrc0, GST_STATE_PAUSED);
if (ret == GST_STATE_CHANGE_FAILURE)
goto start_udp_failure;
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 */
count++;
if (count > src->retry)
goto no_ports;
GST_DEBUG_OBJECT (src, "RTP port not even, retry %d", count);
/* have to keep port allocated so we can get a new one */
if (tmp != NULL) {
GST_DEBUG_OBJECT (src, "free temp");
gst_element_set_state (tmp, GST_STATE_NULL);
gst_object_unref (tmp);
}
tmp = udpsrc0;
GST_DEBUG_OBJECT (src, "retry %d", count);
goto again;
}
/* free leftover temp element/port */
if (tmp) {
gst_element_set_state (tmp, GST_STATE_NULL);
gst_object_unref (tmp);
tmp = NULL;
}
/* allocate port+1 for RTCP now */
udpsrc1 = gst_element_make_from_uri (GST_URI_SRC, "udp://0.0.0.0", NULL);
if (udpsrc1 == NULL)
goto no_udp_rtcp_protocol;
/* set port */
tmp_rtcp = tmp_rtp + 1;
g_object_set (G_OBJECT (udpsrc1), "port", tmp_rtcp, NULL);
GST_DEBUG_OBJECT (src, "starting RTCP on port %d", tmp_rtcp);
ret = gst_element_set_state (udpsrc1, GST_STATE_PAUSED);
/* FIXME, this could fail if the next port is not free, we
* should retry with another port then */
if (ret == GST_STATE_CHANGE_FAILURE)
goto start_rtcp_failure;
/* 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 (udpsrc0);
stream->udpsrc[1] = gst_object_ref (udpsrc1);
/* they are ours now */
gst_object_sink (udpsrc0);
gst_object_sink (udpsrc1);
return TRUE;
/* ERRORS */
no_udp_protocol:
{
GST_DEBUG_OBJECT (src, "could not get UDP source");
goto cleanup;
}
start_udp_failure:
{
GST_DEBUG_OBJECT (src, "could not start 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;
}
start_rtcp_failure:
{
GST_DEBUG_OBJECT (src, "could not start 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 (tmp) {
gst_element_set_state (tmp, GST_STATE_NULL);
gst_object_unref (tmp);
}
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
pad_unblocked (GstPad * pad, gboolean blocked, GstRTSPSrc * src)
{
GST_DEBUG_OBJECT (src, "pad %s:%s unblocked", GST_DEBUG_PAD_NAME (pad));
}
static void
pad_blocked (GstPad * pad, gboolean blocked, GstRTSPSrc * src)
{
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;
was_ok:
{
GST_OBJECT_UNLOCK (src);
return;
}
}
/* 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_session_pad (GstElement * session, GstPad * pad, GstRTSPSrc * src)
{
gchar *name;
GstPadTemplate *template;
gint id, ssrc, pt;
GList *lstream;
GstRTSPStream *stream;
GST_DEBUG_OBJECT (src, "got new session pad %" GST_PTR_FORMAT, pad);
/* find stream */
name = gst_object_get_name (GST_OBJECT_CAST (pad));
if (sscanf (name, "recv_rtp_src_%d_%d_%d", &id, &ssrc, &pt) != 3)
goto unknown_stream;
GST_DEBUG_OBJECT (src, "stream: %u, SSRC %d, PT %d", id, ssrc, pt);
lstream = g_list_find_custom (src->streams, GINT_TO_POINTER (id),
(GCompareFunc) find_stream_by_id);
if (lstream == NULL)
goto unknown_stream;
/* get stream */
stream = (GstRTSPStream *) lstream->data;
/* 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);
stream->added = TRUE;
gst_pad_set_active (stream->srcpad, TRUE);
gst_element_add_pad (GST_ELEMENT_CAST (src), stream->srcpad);
/* check if we added all streams */
for (lstream = src->streams; lstream; lstream = g_list_next (lstream)) {
stream = (GstRTSPStream *) lstream->data;
if (!stream->added)
goto done;
}
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));
done:
return;
/* ERRORS */
unknown_stream:
{
GST_DEBUG_OBJECT (src, "ignoring unknown stream");
g_free (name);
return;
}
}
static GstCaps *
request_pt_map (GstElement * sess, guint session, guint pt, GstRTSPSrc * src)
{
GstRTSPStream *stream;
GList *lstream;
lstream = g_list_find_custom (src->streams, GINT_TO_POINTER (session),
(GCompareFunc) find_stream_by_id);
if (!lstream)
goto unknown_stream;
stream = (GstRTSPStream *) lstream->data;
GST_DEBUG_OBJECT (src, "getting pt map for pt %d in session %d", pt, session);
return stream->caps;
unknown_stream:
{
GST_DEBUG_OBJECT (src, "unknown stream %d", session);
return NULL;
}
}
/* 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,
RTSPTransport * transport)
{
GstRTSPSrc *src;
GstPad *outpad = NULL;
GstPadTemplate *template;
GstStateChangeReturn ret;
gchar *name;
GstStructure *s;
const gchar *mime, *manager;
RTSPResult res;
src = stream->parent;
GST_DEBUG_OBJECT (src, "configuring transport for stream %p", stream);
s = gst_caps_get_structure (stream->caps, 0);
/* get the proper mime type for this stream now */
if ((res = rtsp_transport_get_mime (transport->trans, &mime)) < 0)
goto no_mime;
if (!mime)
goto no_mime;
/* configure the final mime type */
GST_DEBUG_OBJECT (src, "setting mime to %s", mime);
gst_structure_set_name (s, mime);
/* find a manager */
if ((res = 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->session == NULL) {
if (!(src->session = gst_element_factory_make (manager, NULL))) {
/* fallback */
if ((res =
rtsp_transport_get_manager (transport->trans, &manager, 1)) < 0)
goto no_manager;
if (!manager)
goto use_no_manager;
if (!(src->session = gst_element_factory_make (manager, NULL)))
goto manager_failed;
}
/* we manage this element */
gst_bin_add (GST_BIN_CAST (src), src->session);
ret = gst_element_set_state (src->session, GST_STATE_PAUSED);
if (ret == GST_STATE_CHANGE_FAILURE)
goto start_session_failure;
}
/* 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_%d", stream->id);
stream->channelpad[0] = gst_element_get_request_pad (src->session, name);
g_free (name);
name = g_strdup_printf ("recv_rtcp_sink_%d", stream->id);
stream->channelpad[1] = gst_element_get_request_pad (src->session, name);
g_free (name);
}
use_no_manager:
if (transport->lower_transport == RTSP_LOWER_TRANS_TCP) {
gint i;
/* 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 */
for (i = 0; i < 2; i++) {
if (stream->udpsrc[i]) {
gst_element_set_state (stream->udpsrc[i], GST_STATE_NULL);
gst_object_unref (stream->udpsrc[i]);
stream->udpsrc[i] = NULL;
}
}
/* 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%d", 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");
/* we connected to pad-added signal to get pads from the manager */
}
} else {
/* multicast was selected, create UDP sources and join the multicast
* group. */
if (transport->lower_transport == RTSP_LOWER_TRANS_UDP_MCAST) {
gchar *uri;
GST_DEBUG_OBJECT (src, "creating UDP sources for multicast");
/* creating UDP source */
if (transport->port.min != -1) {
uri = g_strdup_printf ("udp://%s:%d", transport->destination,
transport->port.min);
stream->udpsrc[0] = gst_element_make_from_uri (GST_URI_SRC, uri, NULL);
g_free (uri);
if (stream->udpsrc[0] == NULL)
goto no_element;
/* take ownership */
gst_object_ref (stream->udpsrc[0]);
gst_object_sink (stream->udpsrc[0]);
/* change state */
gst_element_set_state (stream->udpsrc[0], GST_STATE_READY);
}
/* creating another UDP source */
if (transport->port.max != -1) {
uri = g_strdup_printf ("udp://%s:%d", transport->destination,
transport->port.max);
stream->udpsrc[1] = gst_element_make_from_uri (GST_URI_SRC, uri, NULL);
g_free (uri);
if (stream->udpsrc[1] == NULL)
goto no_element;
/* take ownership */
gst_object_ref (stream->udpsrc[0]);
gst_object_sink (stream->udpsrc[0]);
gst_element_set_state (stream->udpsrc[1], GST_STATE_READY);
}
}
/* 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]) {
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->timeout,
NULL);
/* get output pad of the UDP source. */
outpad = gst_element_get_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. */
gst_pad_set_blocked_async (outpad, TRUE,
(GstPadBlockCallback) pad_blocked, src);
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 (outpad, stream->channelpad[0]);
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");
}
}
if (stream->udpsrc[1]) {
gst_bin_add (GST_BIN_CAST (src), stream->udpsrc[1]);
if (stream->channelpad[1]) {
GstPad *pad;
GST_DEBUG_OBJECT (src, "connecting UDP source 1 to manager");
pad = gst_element_get_pad (stream->udpsrc[1], "src");
gst_pad_link (pad, stream->channelpad[1]);
gst_object_unref (pad);
}
}
}
if (src->session && !src->session_sig_id) {
GST_DEBUG_OBJECT (src, "connect to signals on session manager");
src->session_sig_id =
g_signal_connect (src->session, "pad-added",
(GCallback) new_session_pad, src);
src->session_ptmap_id =
g_signal_connect (src->session, "request-pt-map",
(GCallback) request_pt_map, src);
}
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%d", stream->id);
template = gst_static_pad_template_get (&rtptemplate);
stream->srcpad = gst_ghost_pad_new_from_template (name, outpad, template);
gst_object_unref (template);
g_free (name);
gst_object_unref (outpad);
}
/* mark pad as ok */
stream->last_ret = GST_FLOW_OK;
return TRUE;
/* ERRORS */
no_mime:
{
GST_DEBUG_OBJECT (src, "unknown transport");
return FALSE;
}
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;
}
no_element:
{
GST_DEBUG_OBJECT (src, "no UDP source element found");
return FALSE;
}
start_session_failure:
{
GST_DEBUG_OBJECT (src, "could not start session");
return FALSE;
}
}
static gboolean
gst_rtspsrc_stream_configure_caps (GstRTSPStream * stream)
{
/* configure the caps on the UDP source and the channelpad */
if (stream->udpsrc[0]) {
//g_object_set (G_OBJECT (stream->udpsrc[0]), "caps", stream->caps, NULL);
}
if (stream->channelpad[0]) {
//gst_pad_set_caps (stream->channelpad[0], stream->caps);
}
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_pad_set_active (stream->srcpad, TRUE);
/* add the pad */
if (!stream->added) {
//gst_pad_set_caps (stream->srcpad, stream->caps);
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->blockedpad) {
gst_pad_set_blocked_async (stream->blockedpad, FALSE,
(GstPadBlockCallback) pad_unblocked, src);
stream->blockedpad = NULL;
}
}
return TRUE;
}
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 (GST_FLOW_IS_SUCCESS (ret))
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 void
gst_rtspsrc_push_event (GstRTSPSrc * src, GstEvent * event)
{
GList *streams;
for (streams = src->streams; streams; streams = g_list_next (streams)) {
GstRTSPStream *ostream = (GstRTSPStream *) streams->data;
/* only pads that have a connection to the outside world */
if (ostream->srcpad == NULL)
continue;
if (ostream->channelpad[0]) {
gst_event_ref (event);
if (GST_PAD_IS_SRC (ostream->channelpad[0]))
gst_pad_push_event (ostream->channelpad[0], event);
else
gst_pad_send_event (ostream->channelpad[0], event);
}
if (ostream->channelpad[1]) {
gst_event_ref (event);
if (GST_PAD_IS_SRC (ostream->channelpad[1]))
gst_pad_push_event (ostream->channelpad[1], event);
else
gst_pad_send_event (ostream->channelpad[1], event);
}
}
gst_event_unref (event);
}
static void
gst_rtspsrc_loop_interleaved (GstRTSPSrc * src)
{
RTSPMessage response = { 0 };
RTSPResult res;
gint channel;
GList *lstream;
GstRTSPStream *stream;
GstPad *outpad = NULL;
guint8 *data;
guint size;
GstFlowReturn ret = GST_FLOW_OK;
GstCaps *caps = NULL;
GstBuffer *buf;
gboolean is_rtcp = FALSE;
do {
GST_DEBUG_OBJECT (src, "doing receive");
if ((res = rtsp_connection_receive (src->connection, &response)) < 0)
goto receive_error;
GST_DEBUG_OBJECT (src, "got packet type %d", response.type);
}
while (response.type != RTSP_MESSAGE_DATA);
channel = response.type_data.data.channel;
lstream = g_list_find_custom (src->streams, GINT_TO_POINTER (channel),
(GCompareFunc) find_stream_by_channel);
if (!lstream)
goto unknown_stream;
stream = (GstRTSPStream *) lstream->data;
if (channel == stream->channel[0]) {
outpad = stream->channelpad[0];
caps = stream->caps;
} else if (channel == stream->channel[1]) {
outpad = stream->channelpad[1];
is_rtcp = TRUE;
}
/* take a look at the body to figure out what we have */
rtsp_message_get_body (&response, &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;
/* and chain buffer to internal element */
rtsp_message_steal_body (&response, &data, &size);
/* strip the trailing \0 */
size -= 1;
buf = gst_buffer_new ();
GST_BUFFER_DATA (buf) = data;
GST_BUFFER_MALLOCDATA (buf) = data;
GST_BUFFER_SIZE (buf) = size;
/* don't need message anymore */
rtsp_message_unset (&response);
if (caps)
gst_buffer_set_caps (buf, caps);
GST_DEBUG_OBJECT (src, "pushing data of size %d on channel %d", size,
channel);
if (src->need_activate) {
gst_rtspsrc_activate_streams (src);
src->need_activate = FALSE;
}
/* 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);
if (ret != GST_FLOW_OK)
goto need_pause;
}
return;
/* ERRORS */
unknown_stream:
{
GST_DEBUG_OBJECT (src, "unknown stream on channel %d, ignored", channel);
rtsp_message_unset (&response);
return;
}
receive_error:
{
gchar *str = rtsp_strresult (res);
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not receive message. (%s)", str));
g_free (str);
if (src->debug)
rtsp_message_dump (&response);
rtsp_message_unset (&response);
ret = GST_FLOW_UNEXPECTED;
goto need_pause;
}
invalid_length:
{
GST_ELEMENT_WARNING (src, RESOURCE, READ, (NULL),
("Short message received."));
rtsp_message_unset (&response);
return;
}
need_pause:
{
const gchar *reason = gst_flow_get_name (ret);
GST_DEBUG_OBJECT (src, "pausing task, reason %s", reason);
src->running = FALSE;
gst_task_pause (src->task);
if (GST_FLOW_IS_FATAL (ret) || ret == GST_FLOW_NOT_LINKED) {
if (ret == GST_FLOW_UNEXPECTED) {
/* 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.last_stop));
} else {
gst_rtspsrc_push_event (src, gst_event_new_eos ());
}
} else {
/* for fatal errors we post an error message, post the error
* first 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 ());
}
}
return;
}
}
static void
gst_rtspsrc_loop_udp (GstRTSPSrc * src)
{
gboolean restart = FALSE;
GST_OBJECT_LOCK (src);
if (src->loop_cmd == CMD_STOP)
goto stopping;
/* FIXME, we should continue reading the TCP socket because the server might
* send us requests */
while (src->loop_cmd == CMD_WAIT) {
GST_DEBUG_OBJECT (src, "waiting");
GST_RTSP_LOOP_WAIT (src);
GST_DEBUG_OBJECT (src, "waiting done");
if (src->loop_cmd == CMD_STOP)
goto stopping;
}
if (src->loop_cmd == CMD_RECONNECT) {
/* when we get here we have to reconnect using tcp */
src->loop_cmd = CMD_WAIT;
/* 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 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->timeout / 1000000)));
/* we can try only TCP now */
src->cur_protocols = RTSP_LOWER_TRANS_TCP;
/* pause to prepare for a restart */
gst_rtspsrc_pause (src);
if (src->task) {
/* stop task, we cannot join as this would deadlock */
gst_task_stop (src->task);
/* and free the task so that _close will not stop/join it again. */
gst_object_unref (GST_OBJECT (src->task));
src->task = NULL;
}
/* close and cleanup our state */
gst_rtspsrc_close (src);
/* see if we have TCP left to try */
if (!(src->cur_protocols & RTSP_LOWER_TRANS_TCP))
goto no_protocols;
/* open new connection using tcp */
if (!gst_rtspsrc_open (src))
goto open_failed;
/* flush previous state */
gst_element_post_message (GST_ELEMENT_CAST (src),
gst_message_new_async_start (GST_OBJECT_CAST (src), TRUE));
gst_element_post_message (GST_ELEMENT_CAST (src),
gst_message_new_async_done (GST_OBJECT_CAST (src)));
/* start playback */
if (!gst_rtspsrc_play (src))
goto play_failed;
done:
return;
/* ERRORS */
stopping:
{
GST_OBJECT_UNLOCK (src);
src->running = FALSE;
gst_task_pause (src->task);
return;
}
no_protocols:
{
src->cur_protocols = 0;
/* no transport possible, post an error and stop */
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not connect to server, no protocols left"));
return;
}
open_failed:
{
GST_DEBUG_OBJECT (src, "open failed");
return;
}
play_failed:
{
GST_DEBUG_OBJECT (src, "play failed");
return;
}
}
static void
gst_rtspsrc_loop_send_cmd (GstRTSPSrc * src, gint cmd)
{
GST_OBJECT_LOCK (src);
src->loop_cmd = cmd;
GST_RTSP_LOOP_SIGNAL (src);
GST_OBJECT_UNLOCK (src);
}
static void
gst_rtspsrc_loop (GstRTSPSrc * src)
{
if (src->interleaved)
gst_rtspsrc_loop_interleaved (src);
else
gst_rtspsrc_loop_udp (src);
}
static RTSPResult
gst_rtspsrc_handle_request (GstRTSPSrc * src, RTSPMessage * request)
{
RTSPMessage response = { 0 };
RTSPResult res;
res = rtsp_message_init_response (&response, RTSP_STS_OK, "OK", request);
if (res < 0)
goto send_error;
if (src->debug)
rtsp_message_dump (&response);
if ((res = rtsp_connection_send (src->connection, &response)) < 0)
goto send_error;
return RTSP_OK;
/* ERRORS */
send_error:
{
gchar *str = rtsp_strresult (res);
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not send message. (%s)", str));
g_free (str);
return res;
}
}
#ifndef GST_DISABLE_GST_DEBUG
const gchar *
rtsp_auth_method_to_string (RTSPAuthMethod 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
/* Parse a WWW-Authenticate Response header and determine the
* available authentication methods
* FIXME: To implement digest or other auth types, we should extract
* the authentication tokens that the server provided for each method
* into an array of structures and give those to the connection object.
*
* This code should also cope with the fact that each WWW-Authenticate
* header can contain multiple challenge methods + tokens
*
* At the moment, we just do a minimal check for Basic auth and don't
* even parse out the realm */
static void
gst_rtspsrc_parse_auth_hdr (gchar * hdr, RTSPAuthMethod * methods)
{
gchar *start;
g_return_if_fail (hdr != NULL);
g_return_if_fail (methods != 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 |= RTSP_AUTH_BASIC;
}
/**
* 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, RTSPMessage * response)
{
gchar *user = NULL;
gchar *pass = NULL;
RTSPAuthMethod avail_methods = RTSP_AUTH_NONE;
RTSPAuthMethod method;
RTSPResult auth_result;
gchar *hdr;
/* Identify the available auth methods and see if any are supported */
if (rtsp_message_get_header (response, RTSP_HDR_WWW_AUTHENTICATE, &hdr) ==
RTSP_OK) {
gst_rtspsrc_parse_auth_hdr (hdr, &avail_methods);
}
if (avail_methods == RTSP_AUTH_NONE)
goto no_auth_available;
/* FIXME: 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 */
/* Do we have username and password available? */
if (src->url != NULL && !src->tried_url_auth) {
user = src->url->user;
pass = src->url->passwd;
src->tried_url_auth = TRUE;
GST_DEBUG_OBJECT (src,
"Attempting authentication using credentials from the URL");
}
/* 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 = RTSP_AUTH_MAX; method != 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 =
rtsp_connection_set_auth (src->connection, 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 == RTSP_OK || auth_result == RTSP_EINVAL) {
GST_DEBUG_OBJECT (src, "Attempting %s authentication",
rtsp_auth_method_to_string (method));
break;
}
}
if (method == 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;
}
}
/**
* gst_rtspsrc_send:
* @src: the rtsp source
* @request: must point to a valid request
* @response: must point to an empty #RTSPMessage
*
* 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 TRUE, @response will contain a valid response
* message that should be cleaned with rtsp_message_unset() after usage.
*
* If @code is NULL, this function will return FALSE (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: TRUE if the processing was successful.
*/
gboolean
gst_rtspsrc_send (GstRTSPSrc * src, RTSPMessage * request,
RTSPMessage * response, RTSPStatusCode * code)
{
RTSPStatusCode int_code = RTSP_STS_OK;
gboolean res;
gboolean retry;
do {
retry = FALSE;
res = gst_rtspsrc_try_send (src, request, response, &int_code);
if (int_code == 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;
}
}
} 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 != RTSP_STS_OK)
goto error_response;
return res;
error_response:
{
switch (response->type_data.response.code) {
case RTSP_STS_NOT_FOUND:
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL), ("%s",
response->type_data.response.reason));
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;
}
/* we return FALSE so we should unset the response ourselves */
rtsp_message_unset (response);
return FALSE;
}
}
static gboolean
gst_rtspsrc_try_send (GstRTSPSrc * src, RTSPMessage * request,
RTSPMessage * response, RTSPStatusCode * code)
{
RTSPResult res;
RTSPStatusCode thecode;
gchar *content_base = NULL;
if (src->extension && src->extension->before_send)
src->extension->before_send (src->extension, request);
if (src->debug)
rtsp_message_dump (request);
if ((res = rtsp_connection_send (src->connection, request)) < 0)
goto send_error;
next:
if ((res = rtsp_connection_receive (src->connection, response)) < 0)
goto receive_error;
if (src->debug)
rtsp_message_dump (response);
switch (response->type) {
case RTSP_MESSAGE_REQUEST:
/* FIXME, handle server request, reply with OK, for now */
if ((res = gst_rtspsrc_handle_request (src, response)) < 0)
goto handle_request_failed;
goto next;
case RTSP_MESSAGE_RESPONSE:
/* ok, a response is good */
break;
default:
case RTSP_MESSAGE_DATA:
/* get next response */
goto next;
}
thecode = response->type_data.response.code;
/* 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 != RTSP_STS_OK)
return FALSE;
/* store new content base if any */
rtsp_message_get_header (response, RTSP_HDR_CONTENT_BASE, &content_base);
g_free (src->content_base);
src->content_base = g_strdup (content_base);
if (src->extension && src->extension->after_send)
src->extension->after_send (src->extension, request, response);
return TRUE;
/* ERRORS */
send_error:
{
gchar *str = rtsp_strresult (res);
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not send message. (%s)", str));
g_free (str);
return FALSE;
}
receive_error:
{
gchar *str = rtsp_strresult (res);
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
("Could not receive message. (%s)", str));
g_free (str);
return FALSE;
}
handle_request_failed:
{
/* ERROR was posted */
return FALSE;
}
}
/* 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, RTSPMessage * response)
{
gchar *respoptions = NULL;
gchar **options;
gint i;
/* clear supported methods */
src->methods = 0;
/* Try Allow Header first */
rtsp_message_get_header (response, RTSP_HDR_ALLOW, &respoptions);
if (!respoptions)
/* Then maybe Public Header... */
rtsp_message_get_header (response, RTSP_HDR_PUBLIC, &respoptions);
if (!respoptions) {
/* this field is not required, assume the server supports
* DESCRIBE, SETUP and PLAY */
GST_DEBUG_OBJECT (src, "could not get OPTIONS");
src->methods = RTSP_DESCRIBE | RTSP_SETUP | RTSP_PLAY | RTSP_PAUSE;
goto done;
}
/* If we get here, the server gave a list of supported methods, parse
* them here. The string is like:
*
* OPTIONS, DESCRIBE, ANNOUNCE, PLAY, SETUP, ...
*/
options = g_strsplit (respoptions, ",", 0);
for (i = 0; options[i]; i++) {
gchar *stripped;
gint method;
stripped = g_strstrip (options[i]);
method = rtsp_find_method (stripped);
/* keep bitfield of supported methods */
if (method != RTSP_INVALID)
src->methods |= method;
}
g_strfreev (options);
/* we need describe and setup */
if (!(src->methods & RTSP_DESCRIBE))
goto no_describe;
if (!(src->methods & RTSP_SETUP))
goto no_setup;
done:
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;
}
}
static RTSPResult
gst_rtspsrc_create_transports_string (GstRTSPSrc * src,
RTSPLowerTrans protocols, gchar ** transports)
{
gchar *result;
RTSPResult res;
*transports = NULL;
if (src->extension && src->extension->get_transports)
if ((res =
src->extension->get_transports (src->extension, protocols,
transports)) < 0)
goto failed;
/* extension listed transports, use those */
if (*transports != NULL)
return RTSP_OK;
/* the default RTSP transports */
result = g_strdup ("");
if (protocols & RTSP_LOWER_TRANS_UDP) {
gchar *new;
GST_DEBUG_OBJECT (src, "adding UDP unicast");
new =
g_strconcat (result, "RTP/AVP/UDP;unicast;client_port=%%u1-%%u2", NULL);
g_free (result);
result = new;
}
if (protocols & RTSP_LOWER_TRANS_UDP_MCAST) {
gchar *new;
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 */
new = g_strconcat (result, result[0] ? "," : "",
"RTP/AVP/UDP;multicast", NULL);
g_free (result);
result = new;
}
if (protocols & RTSP_LOWER_TRANS_TCP) {
gchar *new;
GST_DEBUG_OBJECT (src, "adding TCP");
new = g_strconcat (result, result[0] ? "," : "",
"RTP/AVP/TCP;unicast;interleaved=%%i1-%%i2", NULL);
g_free (result);
result = new;
}
*transports = result;
return RTSP_OK;
/* ERRORS */
failed:
{
return res;
}
}
static RTSPResult
gst_rtspsrc_prepare_transports (GstRTSPStream * stream, gchar ** transports)
{
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 (!gst_rtspsrc_alloc_udp_ports (stream, &rtpport, &rtcpport))
goto failed;
}
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;
}
g_free (*transports);
*transports = g_string_free (str, FALSE);
done:
return RTSP_OK;
/* ERRORS */
failed:
{
return RTSP_ERROR;
}
}
/* 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 gboolean
gst_rtspsrc_setup_streams (GstRTSPSrc * src)
{
GList *walk;
RTSPResult res;
RTSPMessage request = { 0 };
RTSPMessage response = { 0 };
GstRTSPStream *stream = NULL;
RTSPLowerTrans protocols;
/* we initially allow all configured lower transports. based on the URL
* transports and the replies from the server we narrow them down. */
protocols = src->url->transports & src->cur_protocols;
/* reset some state */
src->free_channel = 0;
src->interleaved = FALSE;
for (walk = src->streams; walk; walk = g_list_next (walk)) {
gchar *transports;
stream = (GstRTSPStream *) walk->data;
/* see if we need to configure this stream */
if (src->extension && src->extension->configure_stream) {
if (!src->extension->configure_stream (src->extension, stream)) {
GST_DEBUG_OBJECT (src, "skipping stream %p, disabled by extension",
stream);
continue;
}
}
/* merge/overwrite global caps */
if (stream->caps) {
guint j, num;
GstStructure *s;
s = gst_caps_get_structure (stream->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->setup_url == NULL) {
GST_DEBUG_OBJECT (src, "skipping stream %p, no setup", stream);
continue;
}
GST_DEBUG_OBJECT (src, "doing setup of stream %p with %s", stream,
stream->setup_url);
/* create a string with all the transports */
res = gst_rtspsrc_create_transports_string (src, protocols, &transports);
if (res < 0)
goto setup_transport_failed;
/* 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);
if (res < 0)
goto setup_transport_failed;
/* create SETUP request */
res = rtsp_message_init_request (&request, RTSP_SETUP, stream->setup_url);
if (res < 0)
goto create_request_failed;
/* select transport, copy is made when adding to header so we can free it. */
rtsp_message_add_header (&request, RTSP_HDR_TRANSPORT, transports);
g_free (transports);
if (!gst_rtspsrc_send (src, &request, &response, NULL))
goto send_error;
/* parse response transport */
{
gchar *resptrans = NULL;
RTSPTransport transport = { 0 };
rtsp_message_get_header (&response, RTSP_HDR_TRANSPORT, &resptrans);
if (!resptrans)
goto no_transport;
/* parse transport */
if (rtsp_transport_parse (resptrans, &transport) != RTSP_OK)
continue;
/* 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 RTSP_LOWER_TRANS_TCP:
GST_DEBUG_OBJECT (src, "stream %p as TCP interleaved", stream);
protocols = 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 RTSP_LOWER_TRANS_UDP_MCAST:
/* only allow multicast for other streams */
GST_DEBUG_OBJECT (src, "stream %p as UDP multicast", stream);
protocols = RTSP_LOWER_TRANS_UDP_MCAST;
break;
case RTSP_LOWER_TRANS_UDP:
/* only allow unicast for other streams */
GST_DEBUG_OBJECT (src, "stream %p as UDP unicast", stream);
protocols = RTSP_LOWER_TRANS_UDP;
break;
default:
GST_DEBUG_OBJECT (src, "stream %p unknown transport %d", stream,
transport.lower_transport);
break;
}
if (!stream->container || !src->interleaved) {
/* 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);
}
}
/* clean up our transport struct */
rtsp_transport_init (&transport);
}
}
if (src->extension && src->extension->stream_select)
src->extension->stream_select (src->extension);
/* we need to activate the streams when we detect activity */
src->need_activate = TRUE;
return TRUE;
/* ERRORS */
create_request_failed:
{
gchar *str = 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."));
goto cleanup_error;
}
send_error:
{
gchar *str = rtsp_strresult (res);
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not send message. (%s)", str));
g_free (str);
goto cleanup_error;
}
no_transport:
{
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Server did not select transport."));
goto cleanup_error;
}
cleanup_error:
{
rtsp_message_unset (&request);
rtsp_message_unset (&response);
return FALSE;
}
}
static gboolean
gst_rtspsrc_open (GstRTSPSrc * src)
{
RTSPResult res;
RTSPMessage request = { 0 };
RTSPMessage response = { 0 };
guint8 *data;
guint size;
gint i, n_streams;
SDPMessage sdp = { 0 };
GstRTSPStream *stream = NULL;
gchar *respcont = NULL;
/* reset our state */
gst_segment_init (&src->segment, GST_FORMAT_TIME);
/* can't continue without a valid url */
if (G_UNLIKELY (src->url == NULL))
goto no_url;
src->tried_url_auth = FALSE;
/* create connection */
GST_DEBUG_OBJECT (src, "creating connection (%s)...", src->req_location);
if ((res = rtsp_connection_create (src->url, &src->connection)) < 0)
goto could_not_create;
/* connect */
GST_DEBUG_OBJECT (src, "connecting (%s)...", src->req_location);
if ((res = rtsp_connection_connect (src->connection)) < 0)
goto could_not_connect;
/* create OPTIONS */
GST_DEBUG_OBJECT (src, "create options...");
res = rtsp_message_init_request (&request, RTSP_OPTIONS, src->req_location);
if (res < 0)
goto create_request_failed;
/* send OPTIONS */
GST_DEBUG_OBJECT (src, "send options...");
if (!gst_rtspsrc_send (src, &request, &response, NULL))
goto send_error;
/* parse OPTIONS */
if (!gst_rtspsrc_parse_methods (src, &response))
goto methods_error;
/* create DESCRIBE */
GST_DEBUG_OBJECT (src, "create describe...");
res = rtsp_message_init_request (&request, RTSP_DESCRIBE, src->req_location);
if (res < 0)
goto create_request_failed;
/* we only accept SDP for now */
rtsp_message_add_header (&request, RTSP_HDR_ACCEPT, "application/sdp");
/* prepare global stream caps properties */
if (src->props)
gst_structure_remove_all_fields (src->props);
else
src->props = gst_structure_empty_new ("RTSP Properties");
/* send DESCRIBE */
GST_DEBUG_OBJECT (src, "send describe...");
if (!gst_rtspsrc_send (src, &request, &response, NULL))
goto send_error;
/* check if reply is SDP */
rtsp_message_get_header (&response, RTSP_HDR_CONTENT_TYPE, &respcont);
/* 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 */
rtsp_message_get_body (&response, &data, &size);
GST_DEBUG_OBJECT (src, "parse SDP...");
sdp_message_init (&sdp);
sdp_message_parse_buffer (data, size, &sdp);
if (src->debug)
sdp_message_dump (&sdp);
if (src->extension && src->extension->parse_sdp)
src->extension->parse_sdp (src->extension, &sdp);
/* create streams */
n_streams = sdp_message_medias_len (&sdp);
for (i = 0; i < n_streams; i++) {
stream = gst_rtspsrc_create_stream (src, &sdp, i);
}
/* setup streams */
gst_rtspsrc_setup_streams (src);
/* clean up any messages */
rtsp_message_unset (&request);
rtsp_message_unset (&response);
return TRUE;
/* ERRORS */
no_url:
{
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL),
("No valid RTSP URL was provided"));
goto cleanup_error;
}
could_not_create:
{
gchar *str = rtsp_strresult (res);
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
("Could not create connection. (%s)", str));
g_free (str);
goto cleanup_error;
}
could_not_connect:
{
gchar *str = rtsp_strresult (res);
GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ_WRITE, (NULL),
("Could not connect to server. (%s)", str));
g_free (str);
goto cleanup_error;
}
create_request_failed:
{
gchar *str = 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 */
goto cleanup_error;
}
wrong_content_type:
{
GST_ELEMENT_ERROR (src, RESOURCE, SETTINGS, (NULL),
("Server does not support SDP, got %s.", respcont));
goto cleanup_error;
}
cleanup_error:
{
rtsp_message_unset (&request);
rtsp_message_unset (&response);
return FALSE;
}
}
static gboolean
gst_rtspsrc_close (GstRTSPSrc * src)
{
RTSPMessage request = { 0 };
RTSPMessage response = { 0 };
RTSPResult res;
GST_DEBUG_OBJECT (src, "TEARDOWN...");
gst_rtspsrc_loop_send_cmd (src, CMD_STOP);
/* stop task if any */
if (src->task) {
gst_task_stop (src->task);
/* make sure it is not running */
g_static_rec_mutex_lock (src->stream_rec_lock);
g_static_rec_mutex_unlock (src->stream_rec_lock);
/* no wait for the task to finish */
gst_task_join (src->task);
/* and free the task */
gst_object_unref (GST_OBJECT (src->task));
src->task = NULL;
}
if (src->methods & RTSP_PLAY) {
/* do TEARDOWN */
res =
rtsp_message_init_request (&request, RTSP_TEARDOWN, src->req_location);
if (res < 0)
goto create_request_failed;
if (!gst_rtspsrc_send (src, &request, &response, NULL))
goto send_error;
/* FIXME, parse result? */
rtsp_message_unset (&request);
rtsp_message_unset (&response);
}
/* close connection */
GST_DEBUG_OBJECT (src, "closing connection...");
if ((res = rtsp_connection_close (src->connection)) < 0)
goto close_failed;
/* free connection */
rtsp_connection_free (src->connection);
src->connection = NULL;
/* cleanup */
gst_rtspsrc_cleanup (src);
return TRUE;
/* ERRORS */
create_request_failed:
{
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
("Could not create request."));
return FALSE;
}
send_error:
{
rtsp_message_unset (&request);
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not send message."));
return FALSE;
}
close_failed:
{
GST_ELEMENT_ERROR (src, RESOURCE, CLOSE, (NULL), ("Close failed."));
return FALSE;
}
}
/* RTP-Info is of the format:
*
* url=<URL>;[seq=<seqbase>;rtptime=<timebase>] [, url=...]
*/
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=")) {
GList *lstream;
/* get the url and the stream */
lstream = g_list_find_custom (src->streams, (fields[j] + 4),
(GCompareFunc) find_stream_by_setup);
if (lstream)
stream = (GstRTSPStream *) lstream->data;
} else if (g_str_has_prefix (fields[j], "seq=")) {
seqbase = atoi (fields[j] + 4);
} else if (g_str_has_prefix (fields[j], "rtptime=")) {
timebase = atol (fields[j] + 8);
}
}
/* now we need to store the values in the caps of the stream and make sure
* that the UDP elements have the same caps property set before they receive
* the first buffer. */
if (stream != NULL) {
GstCaps *caps;
GST_DEBUG_OBJECT (src,
"found stream %p, seqbase %d, timebase %" G_GINT64_FORMAT, stream,
seqbase, timebase);
/* we have a stream, configure detected params */
stream->seqbase = seqbase;
stream->timebase = timebase;
if ((caps = stream->caps)) {
/* update caps */
gst_caps_set_simple (caps, "clock-base", G_TYPE_UINT, timebase,
"seqnum-base", G_TYPE_UINT, seqbase, NULL);
/* and configure the stream caps */
gst_rtspsrc_stream_configure_caps (stream);
}
}
}
g_strfreev (infos);
return TRUE;
}
static gboolean
gst_rtspsrc_play (GstRTSPSrc * src)
{
RTSPMessage request = { 0 };
RTSPMessage response = { 0 };
RTSPResult res;
gchar *rtpinfo;
if (!(src->methods & RTSP_PLAY))
return TRUE;
GST_DEBUG_OBJECT (src, "PLAY...");
/* do play */
res = rtsp_message_init_request (&request, RTSP_PLAY, src->req_location);
if (res < 0)
goto create_request_failed;
rtsp_message_add_header (&request, RTSP_HDR_RANGE, "npt=0-");
if (!gst_rtspsrc_send (src, &request, &response, NULL))
goto send_error;
rtsp_message_unset (&request);
/* 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...
* FIXME, this is info for the RTP session manager ideally. */
rtsp_message_get_header (&response, RTSP_HDR_RTP_INFO, &rtpinfo);
if (rtpinfo)
gst_rtspsrc_parse_rtpinfo (src, rtpinfo);
rtsp_message_unset (&response);
/* for interleaved transport, we receive the data on the RTSP connection
* instead of UDP. We start a task to select and read from that connection.
* For UDP we start the task as well to look for server info and UDP timeouts. */
if (src->task == NULL) {
src->task = gst_task_create ((GstTaskFunction) gst_rtspsrc_loop, src);
gst_task_set_lock (src->task, src->stream_rec_lock);
}
src->running = TRUE;
gst_rtspsrc_loop_send_cmd (src, CMD_WAIT);
gst_task_start (src->task);
return TRUE;
/* ERRORS */
create_request_failed:
{
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
("Could not create request."));
return FALSE;
}
send_error:
{
rtsp_message_unset (&request);
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not send message."));
return FALSE;
}
}
static gboolean
gst_rtspsrc_pause (GstRTSPSrc * src)
{
RTSPMessage request = { 0 };
RTSPMessage response = { 0 };
RTSPResult res;
if (!(src->methods & RTSP_PAUSE))
return TRUE;
GST_DEBUG_OBJECT (src, "PAUSE...");
/* do pause */
res = rtsp_message_init_request (&request, RTSP_PAUSE, src->req_location);
if (res < 0)
goto create_request_failed;
if (!gst_rtspsrc_send (src, &request, &response, NULL))
goto send_error;
rtsp_message_unset (&request);
rtsp_message_unset (&response);
return TRUE;
/* ERRORS */
create_request_failed:
{
GST_ELEMENT_ERROR (src, LIBRARY, INIT, (NULL),
("Could not create request."));
return FALSE;
}
send_error:
{
rtsp_message_unset (&request);
GST_ELEMENT_ERROR (src, RESOURCE, WRITE, (NULL),
("Could not send message."));
return FALSE;
}
}
static void
gst_rtspsrc_handle_message (GstBin * bin, GstMessage * message)
{
GstRTSPSrc *rtspsrc;
rtspsrc = GST_RTSPSRC (bin);
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_ELEMENT:
{
const GstStructure *s = gst_message_get_structure (message);
if (gst_structure_has_name (s, "GstUDPSrcTimeout")) {
GST_DEBUG_OBJECT (bin, "timeout on UDP port");
gst_rtspsrc_loop_send_cmd (rtspsrc, CMD_RECONNECT);
return;
}
GST_BIN_CLASS (parent_class)->handle_message (bin, message);
break;
}
case GST_MESSAGE_ERROR:
{
GstObject *udpsrc;
GList *lstream;
GstRTSPStream *stream;
GstFlowReturn ret;
udpsrc = GST_MESSAGE_SRC (message);
GST_DEBUG_OBJECT (rtspsrc, "got error from %s",
GST_ELEMENT_NAME (udpsrc));
lstream = g_list_find_custom (rtspsrc->streams, udpsrc,
(GCompareFunc) find_stream_by_udpsrc);
if (!lstream)
goto forward;
stream = (GstRTSPStream *) lstream->data;
/* 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;
/* fatal our not our message, forward */
forward:
GST_BIN_CLASS (parent_class)->handle_message (bin, message);
break;
}
default:
{
GST_BIN_CLASS (parent_class)->handle_message (bin, message);
break;
}
}
}
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:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
rtspsrc->cur_protocols = rtspsrc->protocols;
if (!gst_rtspsrc_open (rtspsrc))
goto open_failed;
break;
case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
rtsp_connection_flush (rtspsrc->connection, FALSE);
/* FIXME, the server might send UDP packets before we activate the UDP
* ports */
gst_rtspsrc_play (rtspsrc);
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
case GST_STATE_CHANGE_PAUSED_TO_READY:
rtsp_connection_flush (rtspsrc->connection, TRUE);
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_READY_TO_PAUSED:
ret = GST_STATE_CHANGE_NO_PREROLL;
break;
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
gst_rtspsrc_pause (rtspsrc);
ret = GST_STATE_CHANGE_NO_PREROLL;
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_rtspsrc_close (rtspsrc);
break;
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
done:
return ret;
open_failed:
{
return GST_STATE_CHANGE_FAILURE;
}
}
/*** GSTURIHANDLER INTERFACE *************************************************/
static GstURIType
gst_rtspsrc_uri_get_type (void)
{
return GST_URI_SRC;
}
static gchar **
gst_rtspsrc_uri_get_protocols (void)
{
static gchar *protocols[] = { "rtsp", "rtspu", "rtspt", NULL };
return protocols;
}
static const gchar *
gst_rtspsrc_uri_get_uri (GstURIHandler * handler)
{
GstRTSPSrc *src = GST_RTSPSRC (handler);
/* should not dup */
return src->location;
}
static gboolean
gst_rtspsrc_uri_set_uri (GstURIHandler * handler, const gchar * uri)
{
GstRTSPSrc *src;
RTSPResult res;
RTSPUrl *newurl;
src = GST_RTSPSRC (handler);
/* same URI, we're fine */
if (src->location && uri && !strcmp (uri, src->location))
goto was_ok;
/* try to parse */
if ((res = rtsp_url_parse (uri, &newurl)) < 0)
goto parse_error;
/* if worked, free previous and store new url object along with the original
* location. */
rtsp_url_free (src->url);
src->url = newurl;
g_free (src->location);
g_free (src->req_location);
src->location = g_strdup (uri);
src->req_location = rtsp_url_get_request_uri (src->url);
GST_DEBUG_OBJECT (src, "set uri: %s", GST_STR_NULL (uri));
GST_DEBUG_OBJECT (src, "request uri is: %s",
GST_STR_NULL (src->req_location));
return TRUE;
/* Special cases */
was_ok:
{
GST_DEBUG_OBJECT (src, "URI was ok: '%s'", GST_STR_NULL (uri));
return TRUE;
}
parse_error:
{
GST_ERROR_OBJECT (src, "Not a valid RTSP url '%s' (%d)",
GST_STR_NULL (uri), res);
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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