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gstreamer/gst-libs/gst/rtp/gstrtpbasepayload.c
Guillaume Desmottes bad4b1711d rtpbasepayload: add auto-header-extension property 
Using RTP header extensions is currently not convenient. Users have to
handle signals from the RTP payloader and instantiate the extension
element themselves, making it impossible to use with gst-launch.

Adding a property allowing the payloader to automatically try creating
extensions. This should help simple use cases and testing using
gst-launch.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1022>
2021-02-03 11:19:04 +01:00

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/* GStreamer
* Copyright (C) <2005> Wim Taymans <wim@fluendo.com>
*
* 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
*/
/**
* SECTION:gstrtpbasepayload
* @title: GstRTPBasePayload
* @short_description: Base class for RTP payloader
*
* Provides a base class for RTP payloaders
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <gst/rtp/gstrtpbuffer.h>
#include "gstrtpbasepayload.h"
#include "gstrtpmeta.h"
#include "gstrtphdrext.h"
GST_DEBUG_CATEGORY_STATIC (rtpbasepayload_debug);
#define GST_CAT_DEFAULT (rtpbasepayload_debug)
static gboolean enable_experimental_twcc = FALSE;
struct _GstRTPBasePayloadPrivate
{
gboolean ts_offset_random;
gboolean seqnum_offset_random;
gboolean ssrc_random;
guint16 next_seqnum;
gboolean perfect_rtptime;
gint notified_first_timestamp;
gboolean pt_set;
gboolean source_info;
GstBuffer *input_meta_buffer;
guint64 base_offset;
gint64 base_rtime;
guint64 base_rtime_hz;
guint64 running_time;
gboolean scale_rtptime;
gboolean auto_hdr_ext;
gint64 prop_max_ptime;
gint64 caps_max_ptime;
gboolean onvif_no_rate_control;
gboolean negotiated;
gboolean delay_segment;
GstEvent *pending_segment;
GstCaps *subclass_srccaps;
GstCaps *sinkcaps;
/* array of GstRTPHeaderExtension's * */
GPtrArray *header_exts;
};
/* RTPBasePayload signals and args */
enum
{
SIGNAL_0,
SIGNAL_REQUEST_EXTENSION,
SIGNAL_ADD_EXTENSION,
SIGNAL_CLEAR_EXTENSIONS,
LAST_SIGNAL
};
static guint gst_rtp_base_payload_signals[LAST_SIGNAL] = { 0 };
/* FIXME 0.11, a better default is the Ethernet MTU of
* 1500 - sizeof(headers) as pointed out by marcelm in IRC:
* So an Ethernet MTU of 1500, minus 60 for the max IP, minus 8 for UDP, gives
* 1432 bytes or so. And that should be adjusted downward further for other
* encapsulations like PPPoE, so 1400 at most.
*/
#define DEFAULT_MTU 1400
#define DEFAULT_PT 96
#define DEFAULT_SSRC -1
#define DEFAULT_TIMESTAMP_OFFSET -1
#define DEFAULT_SEQNUM_OFFSET -1
#define DEFAULT_MAX_PTIME -1
#define DEFAULT_MIN_PTIME 0
#define DEFAULT_PERFECT_RTPTIME TRUE
#define DEFAULT_PTIME_MULTIPLE 0
#define DEFAULT_RUNNING_TIME GST_CLOCK_TIME_NONE
#define DEFAULT_SOURCE_INFO FALSE
#define DEFAULT_ONVIF_NO_RATE_CONTROL FALSE
#define DEFAULT_SCALE_RTPTIME TRUE
#define DEFAULT_AUTO_HEADER_EXTENSION TRUE
#define RTP_HEADER_EXT_ONE_BYTE_MAX_SIZE 16
#define RTP_HEADER_EXT_TWO_BYTE_MAX_SIZE 256
#define RTP_HEADER_EXT_ONE_BYTE_MAX_ID 14
#define RTP_HEADER_EXT_TWO_BYTE_MAX_ID 255
enum
{
PROP_0,
PROP_MTU,
PROP_PT,
PROP_SSRC,
PROP_TIMESTAMP_OFFSET,
PROP_SEQNUM_OFFSET,
PROP_MAX_PTIME,
PROP_MIN_PTIME,
PROP_TIMESTAMP,
PROP_SEQNUM,
PROP_PERFECT_RTPTIME,
PROP_PTIME_MULTIPLE,
PROP_STATS,
PROP_SOURCE_INFO,
PROP_ONVIF_NO_RATE_CONTROL,
PROP_SCALE_RTPTIME,
PROP_AUTO_HEADER_EXTENSION,
PROP_LAST
};
static void gst_rtp_base_payload_class_init (GstRTPBasePayloadClass * klass);
static void gst_rtp_base_payload_init (GstRTPBasePayload * rtpbasepayload,
gpointer g_class);
static void gst_rtp_base_payload_finalize (GObject * object);
static GstCaps *gst_rtp_base_payload_getcaps_default (GstRTPBasePayload *
rtpbasepayload, GstPad * pad, GstCaps * filter);
static gboolean gst_rtp_base_payload_sink_event_default (GstRTPBasePayload *
rtpbasepayload, GstEvent * event);
static gboolean gst_rtp_base_payload_sink_event (GstPad * pad,
GstObject * parent, GstEvent * event);
static gboolean gst_rtp_base_payload_src_event_default (GstRTPBasePayload *
rtpbasepayload, GstEvent * event);
static gboolean gst_rtp_base_payload_src_event (GstPad * pad,
GstObject * parent, GstEvent * event);
static gboolean gst_rtp_base_payload_query_default (GstRTPBasePayload *
rtpbasepayload, GstPad * pad, GstQuery * query);
static gboolean gst_rtp_base_payload_query (GstPad * pad, GstObject * parent,
GstQuery * query);
static GstFlowReturn gst_rtp_base_payload_chain (GstPad * pad,
GstObject * parent, GstBuffer * buffer);
static void gst_rtp_base_payload_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rtp_base_payload_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_rtp_base_payload_change_state (GstElement *
element, GstStateChange transition);
static gboolean gst_rtp_base_payload_negotiate (GstRTPBasePayload * payload);
static void gst_rtp_base_payload_add_extension (GstRTPBasePayload * payload,
GstRTPHeaderExtension * ext);
static void gst_rtp_base_payload_clear_extensions (GstRTPBasePayload * payload);
static GstElementClass *parent_class = NULL;
static gint private_offset = 0;
GType
gst_rtp_base_payload_get_type (void)
{
static GType rtpbasepayload_type = 0;
if (g_once_init_enter ((gsize *) & rtpbasepayload_type)) {
static const GTypeInfo rtpbasepayload_info = {
sizeof (GstRTPBasePayloadClass),
NULL,
NULL,
(GClassInitFunc) gst_rtp_base_payload_class_init,
NULL,
NULL,
sizeof (GstRTPBasePayload),
0,
(GInstanceInitFunc) gst_rtp_base_payload_init,
};
GType _type;
_type = g_type_register_static (GST_TYPE_ELEMENT, "GstRTPBasePayload",
&rtpbasepayload_info, G_TYPE_FLAG_ABSTRACT);
private_offset =
g_type_add_instance_private (_type, sizeof (GstRTPBasePayloadPrivate));
g_once_init_leave ((gsize *) & rtpbasepayload_type, _type);
}
return rtpbasepayload_type;
}
static inline GstRTPBasePayloadPrivate *
gst_rtp_base_payload_get_instance_private (GstRTPBasePayload * self)
{
return (G_STRUCT_MEMBER_P (self, private_offset));
}
static GstRTPHeaderExtension *
gst_rtp_base_payload_request_extension_default (GstRTPBasePayload * payload,
guint ext_id, const gchar * uri)
{
GstRTPHeaderExtension *ext = NULL;
if (!payload->priv->auto_hdr_ext)
return NULL;
ext = gst_rtp_header_extension_create_from_uri (uri);
if (ext) {
GST_DEBUG_OBJECT (payload,
"Automatically enabled extension %s for uri \'%s\'",
GST_ELEMENT_NAME (ext), uri);
gst_rtp_header_extension_set_id (ext, ext_id);
} else {
GST_DEBUG_OBJECT (payload,
"Didn't find any extension implementing uri \'%s\'", uri);
}
return ext;
}
static gboolean
extension_accumulator (GSignalInvocationHint * ihint,
GValue * return_accu, const GValue * handler_return, gpointer data)
{
gpointer ext;
/* Call default handler if user callback didn't create the extension */
ext = g_value_get_object (handler_return);
if (!ext)
return TRUE;
g_value_set_object (return_accu, ext);
return FALSE;
}
static void
gst_rtp_base_payload_class_init (GstRTPBasePayloadClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
if (g_getenv ("GST_RTP_ENABLE_EXPERIMENTAL_TWCC_PROPERTY"))
enable_experimental_twcc = TRUE;
if (private_offset != 0)
g_type_class_adjust_private_offset (klass, &private_offset);
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = gst_rtp_base_payload_finalize;
gobject_class->set_property = gst_rtp_base_payload_set_property;
gobject_class->get_property = gst_rtp_base_payload_get_property;
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MTU,
g_param_spec_uint ("mtu", "MTU",
"Maximum size of one packet",
28, G_MAXUINT, DEFAULT_MTU,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PT,
g_param_spec_uint ("pt", "payload type",
"The payload type of the packets", 0, 0x7f, DEFAULT_PT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SSRC,
g_param_spec_uint ("ssrc", "SSRC",
"The SSRC of the packets (default == random)", 0, G_MAXUINT32,
DEFAULT_SSRC, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_TIMESTAMP_OFFSET, g_param_spec_uint ("timestamp-offset",
"Timestamp Offset",
"Offset to add to all outgoing timestamps (default = random)", 0,
G_MAXUINT32, DEFAULT_TIMESTAMP_OFFSET,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM_OFFSET,
g_param_spec_int ("seqnum-offset", "Sequence number Offset",
"Offset to add to all outgoing seqnum (-1 = random)", -1, G_MAXUINT16,
DEFAULT_SEQNUM_OFFSET, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MAX_PTIME,
g_param_spec_int64 ("max-ptime", "Max packet time",
"Maximum duration of the packet data in ns (-1 = unlimited up to MTU)",
-1, G_MAXINT64, DEFAULT_MAX_PTIME,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTPBasePayload:min-ptime:
*
* Minimum duration of the packet data in ns (can't go above MTU)
**/
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_MIN_PTIME,
g_param_spec_int64 ("min-ptime", "Min packet time",
"Minimum duration of the packet data in ns (can't go above MTU)",
0, G_MAXINT64, DEFAULT_MIN_PTIME,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_TIMESTAMP,
g_param_spec_uint ("timestamp", "Timestamp",
"The RTP timestamp of the last processed packet",
0, G_MAXUINT32, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SEQNUM,
g_param_spec_uint ("seqnum", "Sequence number",
"The RTP sequence number of the last processed packet",
0, G_MAXUINT16, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GstRTPBasePayload:perfect-rtptime:
*
* Try to use the offset fields to generate perfect RTP timestamps. When this
* option is disabled, RTP timestamps are generated from GST_BUFFER_PTS of
* each payloaded buffer. The PTSes of buffers may not necessarily increment
* with the amount of data in each input buffer, consider e.g. the case where
* the buffer arrives from a network which means that the PTS is unrelated to
* the amount of data. Because the RTP timestamps are generated from
* GST_BUFFER_PTS this can result in RTP timestamps that also don't increment
* with the amount of data in the payloaded packet. To circumvent this it is
* possible to set the perfect rtptime option enabled. When this option is
* enabled the payloader will increment the RTP timestamps based on
* GST_BUFFER_OFFSET which relates to the amount of data in each packet
* rather than the GST_BUFFER_PTS of each buffer and therefore the RTP
* timestamps will more closely correlate with the amount of data in each
* buffer. Currently GstRTPBasePayload is limited to handling perfect RTP
* timestamps for audio streams.
*/
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PERFECT_RTPTIME,
g_param_spec_boolean ("perfect-rtptime", "Perfect RTP Time",
"Generate perfect RTP timestamps when possible",
DEFAULT_PERFECT_RTPTIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTPBasePayload:ptime-multiple:
*
* Force buffers to be multiples of this duration in ns (0 disables)
**/
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PTIME_MULTIPLE,
g_param_spec_int64 ("ptime-multiple", "Packet time multiple",
"Force buffers to be multiples of this duration in ns (0 disables)",
0, G_MAXINT64, DEFAULT_PTIME_MULTIPLE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTPBasePayload:stats:
*
* Various payloader statistics retrieved atomically (and are therefore
* synchroized with each other), these can be used e.g. to generate an
* RTP-Info header. This property return a GstStructure named
* application/x-rtp-payload-stats containing the following fields relating to
* the last processed buffer and current state of the stream being payloaded:
*
* * `clock-rate` :#G_TYPE_UINT, clock-rate of the stream
* * `running-time` :#G_TYPE_UINT64, running time
* * `seqnum` :#G_TYPE_UINT, sequence number, same as #GstRTPBasePayload:seqnum
* * `timestamp` :#G_TYPE_UINT, RTP timestamp, same as #GstRTPBasePayload:timestamp
* * `ssrc` :#G_TYPE_UINT, The SSRC in use
* * `pt` :#G_TYPE_UINT, The Payload type in use, same as #GstRTPBasePayload:pt
* * `seqnum-offset` :#G_TYPE_UINT, The current offset added to the seqnum
* * `timestamp-offset` :#G_TYPE_UINT, The current offset added to the timestamp
**/
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_STATS,
g_param_spec_boxed ("stats", "Statistics", "Various statistics",
GST_TYPE_STRUCTURE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* GstRTPBasePayload:source-info:
*
* Enable writing the CSRC field in allocated RTP header based on RTP source
* information found in the input buffer's #GstRTPSourceMeta.
*
* Since: 1.16
**/
g_object_class_install_property (gobject_class, PROP_SOURCE_INFO,
g_param_spec_boolean ("source-info", "RTP source information",
"Write CSRC based on buffer meta RTP source information",
DEFAULT_SOURCE_INFO, G_PARAM_READWRITE));
/**
* GstRTPBasePayload:onvif-no-rate-control:
*
* Make the payloader timestamp packets according to the Rate-Control=no
* behaviour specified in the ONVIF replay spec.
*
* Since: 1.16
*/
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_ONVIF_NO_RATE_CONTROL, g_param_spec_boolean ("onvif-no-rate-control",
"ONVIF no rate control",
"Enable ONVIF Rate-Control=no timestamping mode",
DEFAULT_ONVIF_NO_RATE_CONTROL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTPBasePayload:scale-rtptime:
*
* Make the RTP packets' timestamps be scaled with the segment's rate
* (corresponding to RTSP speed parameter). Disabling this property means
* the timestamps will not be affected by the set delivery speed (RTSP speed).
*
* Example: A server wants to allow streaming a recorded video in double
* speed but still have the timestamps correspond to the position in the
* video. This is achieved by the client setting RTSP Speed to 2 while the
* server has this property disabled.
*
* Since: 1.18
*/
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_SCALE_RTPTIME,
g_param_spec_boolean ("scale-rtptime", "Scale RTP time",
"Whether the RTP timestamp should be scaled with the rate (speed)",
DEFAULT_SCALE_RTPTIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTPBasePayload:auto-header-extension:
*
* If enabled, the payloader will automatically try to enable all the
* RTP header extensions provided in the src caps, saving the application
* the need to handle these extensions manually using the
* GstRTPBasePayload::request-extension: signal.
*
* Since: 1.20
*/
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_AUTO_HEADER_EXTENSION, g_param_spec_boolean ("auto-header-extension",
"Automatic RTP header extension",
"Whether RTP header extensions should be automatically enabled, if an implementation is available",
DEFAULT_AUTO_HEADER_EXTENSION,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
/**
* GstRTPBasePayload::add-extension:
* @object: the #GstRTPBasePayload
* @ext: (transfer full): the #GstRTPHeaderExtension
*
* Add @ext as an extension for writing part of an RTP header extension onto
* outgoing RTP packets.
*
* Since: 1.20
*/
gst_rtp_base_payload_signals[SIGNAL_ADD_EXTENSION] =
g_signal_new_class_handler ("add-extension", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gst_rtp_base_payload_add_extension), NULL, NULL, NULL,
G_TYPE_NONE, 1, GST_TYPE_RTP_HEADER_EXTENSION);
/**
* GstRTPBasePayload::request-extension:
* @object: the #GstRTPBasePayload
* @ext_id: the extension id being requested
* @ext_uri: the extension URI being requested
*
* The returned @ext must be configured with the correct @ext_id and with the
* necessary attributes as required by the extension implementation.
*
* Returns: (transfer full): the #GstRTPHeaderExtension for @ext_id, or %NULL
*
* Since: 1.20
*/
gst_rtp_base_payload_signals[SIGNAL_REQUEST_EXTENSION] =
g_signal_new_class_handler ("request-extension",
G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
G_CALLBACK (gst_rtp_base_payload_request_extension_default),
extension_accumulator, NULL, NULL,
GST_TYPE_RTP_HEADER_EXTENSION, 2, G_TYPE_UINT, G_TYPE_STRING);
/**
* GstRTPBasePayload::clear-extensions:
* @object: the #GstRTPBasePayload
*
* Clear all RTP header extensions used by this payloader.
*
* Since: 1.20
*/
gst_rtp_base_payload_signals[SIGNAL_CLEAR_EXTENSIONS] =
g_signal_new_class_handler ("clear-extensions", G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_CALLBACK (gst_rtp_base_payload_clear_extensions), NULL, NULL, NULL,
G_TYPE_NONE, 0);
gstelement_class->change_state = gst_rtp_base_payload_change_state;
klass->get_caps = gst_rtp_base_payload_getcaps_default;
klass->sink_event = gst_rtp_base_payload_sink_event_default;
klass->src_event = gst_rtp_base_payload_src_event_default;
klass->query = gst_rtp_base_payload_query_default;
GST_DEBUG_CATEGORY_INIT (rtpbasepayload_debug, "rtpbasepayload", 0,
"Base class for RTP Payloaders");
}
static void
gst_rtp_base_payload_init (GstRTPBasePayload * rtpbasepayload, gpointer g_class)
{
GstPadTemplate *templ;
GstRTPBasePayloadPrivate *priv;
rtpbasepayload->priv = priv =
gst_rtp_base_payload_get_instance_private (rtpbasepayload);
templ =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "src");
g_return_if_fail (templ != NULL);
rtpbasepayload->srcpad = gst_pad_new_from_template (templ, "src");
gst_pad_set_event_function (rtpbasepayload->srcpad,
gst_rtp_base_payload_src_event);
gst_element_add_pad (GST_ELEMENT (rtpbasepayload), rtpbasepayload->srcpad);
templ =
gst_element_class_get_pad_template (GST_ELEMENT_CLASS (g_class), "sink");
g_return_if_fail (templ != NULL);
rtpbasepayload->sinkpad = gst_pad_new_from_template (templ, "sink");
gst_pad_set_chain_function (rtpbasepayload->sinkpad,
gst_rtp_base_payload_chain);
gst_pad_set_event_function (rtpbasepayload->sinkpad,
gst_rtp_base_payload_sink_event);
gst_pad_set_query_function (rtpbasepayload->sinkpad,
gst_rtp_base_payload_query);
gst_element_add_pad (GST_ELEMENT (rtpbasepayload), rtpbasepayload->sinkpad);
rtpbasepayload->mtu = DEFAULT_MTU;
rtpbasepayload->pt = DEFAULT_PT;
rtpbasepayload->seqnum_offset = DEFAULT_SEQNUM_OFFSET;
rtpbasepayload->ssrc = DEFAULT_SSRC;
rtpbasepayload->ts_offset = DEFAULT_TIMESTAMP_OFFSET;
priv->running_time = DEFAULT_RUNNING_TIME;
priv->seqnum_offset_random = (rtpbasepayload->seqnum_offset == -1);
priv->ts_offset_random = (rtpbasepayload->ts_offset == -1);
priv->ssrc_random = (rtpbasepayload->ssrc == -1);
priv->pt_set = FALSE;
priv->source_info = DEFAULT_SOURCE_INFO;
rtpbasepayload->max_ptime = DEFAULT_MAX_PTIME;
rtpbasepayload->min_ptime = DEFAULT_MIN_PTIME;
rtpbasepayload->priv->perfect_rtptime = DEFAULT_PERFECT_RTPTIME;
rtpbasepayload->ptime_multiple = DEFAULT_PTIME_MULTIPLE;
rtpbasepayload->priv->base_offset = GST_BUFFER_OFFSET_NONE;
rtpbasepayload->priv->base_rtime_hz = GST_BUFFER_OFFSET_NONE;
rtpbasepayload->priv->onvif_no_rate_control = DEFAULT_ONVIF_NO_RATE_CONTROL;
rtpbasepayload->priv->scale_rtptime = DEFAULT_SCALE_RTPTIME;
rtpbasepayload->priv->auto_hdr_ext = DEFAULT_AUTO_HEADER_EXTENSION;
rtpbasepayload->media = NULL;
rtpbasepayload->encoding_name = NULL;
rtpbasepayload->clock_rate = 0;
rtpbasepayload->priv->caps_max_ptime = DEFAULT_MAX_PTIME;
rtpbasepayload->priv->prop_max_ptime = DEFAULT_MAX_PTIME;
rtpbasepayload->priv->header_exts =
g_ptr_array_new_with_free_func ((GDestroyNotify) gst_object_unref);
}
static void
gst_rtp_base_payload_finalize (GObject * object)
{
GstRTPBasePayload *rtpbasepayload;
rtpbasepayload = GST_RTP_BASE_PAYLOAD (object);
g_free (rtpbasepayload->media);
rtpbasepayload->media = NULL;
g_free (rtpbasepayload->encoding_name);
rtpbasepayload->encoding_name = NULL;
gst_caps_replace (&rtpbasepayload->priv->subclass_srccaps, NULL);
gst_caps_replace (&rtpbasepayload->priv->sinkcaps, NULL);
g_ptr_array_unref (rtpbasepayload->priv->header_exts);
rtpbasepayload->priv->header_exts = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstCaps *
gst_rtp_base_payload_getcaps_default (GstRTPBasePayload * rtpbasepayload,
GstPad * pad, GstCaps * filter)
{
GstCaps *caps;
caps = GST_PAD_TEMPLATE_CAPS (GST_PAD_PAD_TEMPLATE (pad));
GST_DEBUG_OBJECT (pad,
"using pad template %p with caps %p %" GST_PTR_FORMAT,
GST_PAD_PAD_TEMPLATE (pad), caps, caps);
if (filter)
caps = gst_caps_intersect_full (filter, caps, GST_CAPS_INTERSECT_FIRST);
else
caps = gst_caps_ref (caps);
return caps;
}
static gboolean
gst_rtp_base_payload_sink_event_default (GstRTPBasePayload * rtpbasepayload,
GstEvent * event)
{
GstObject *parent = GST_OBJECT_CAST (rtpbasepayload);
gboolean res = FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
res = gst_pad_event_default (rtpbasepayload->sinkpad, parent, event);
break;
case GST_EVENT_FLUSH_STOP:
res = gst_pad_event_default (rtpbasepayload->sinkpad, parent, event);
gst_segment_init (&rtpbasepayload->segment, GST_FORMAT_UNDEFINED);
gst_event_replace (&rtpbasepayload->priv->pending_segment, NULL);
break;
case GST_EVENT_CAPS:
{
GstRTPBasePayloadClass *rtpbasepayload_class;
GstCaps *caps;
gst_event_parse_caps (event, &caps);
GST_DEBUG_OBJECT (rtpbasepayload, "setting caps %" GST_PTR_FORMAT, caps);
gst_caps_replace (&rtpbasepayload->priv->sinkcaps, caps);
rtpbasepayload_class = GST_RTP_BASE_PAYLOAD_GET_CLASS (rtpbasepayload);
if (rtpbasepayload_class->set_caps)
res = rtpbasepayload_class->set_caps (rtpbasepayload, caps);
else
res = gst_rtp_base_payload_negotiate (rtpbasepayload);
rtpbasepayload->priv->negotiated = res;
gst_event_unref (event);
break;
}
case GST_EVENT_SEGMENT:
{
GstSegment *segment;
segment = &rtpbasepayload->segment;
gst_event_copy_segment (event, segment);
rtpbasepayload->priv->base_offset = GST_BUFFER_OFFSET_NONE;
GST_DEBUG_OBJECT (rtpbasepayload,
"configured SEGMENT %" GST_SEGMENT_FORMAT, segment);
if (rtpbasepayload->priv->delay_segment) {
gst_event_replace (&rtpbasepayload->priv->pending_segment, event);
gst_event_unref (event);
res = TRUE;
} else {
res = gst_pad_event_default (rtpbasepayload->sinkpad, parent, event);
}
break;
}
case GST_EVENT_GAP:
{
if (G_UNLIKELY (rtpbasepayload->priv->pending_segment)) {
gst_pad_push_event (rtpbasepayload->srcpad,
rtpbasepayload->priv->pending_segment);
rtpbasepayload->priv->pending_segment = FALSE;
rtpbasepayload->priv->delay_segment = FALSE;
}
res = gst_pad_event_default (rtpbasepayload->sinkpad, parent, event);
break;
}
default:
res = gst_pad_event_default (rtpbasepayload->sinkpad, parent, event);
break;
}
return res;
}
static gboolean
gst_rtp_base_payload_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
GstRTPBasePayload *rtpbasepayload;
GstRTPBasePayloadClass *rtpbasepayload_class;
gboolean res = FALSE;
rtpbasepayload = GST_RTP_BASE_PAYLOAD (parent);
rtpbasepayload_class = GST_RTP_BASE_PAYLOAD_GET_CLASS (rtpbasepayload);
if (rtpbasepayload_class->sink_event)
res = rtpbasepayload_class->sink_event (rtpbasepayload, event);
else
gst_event_unref (event);
return res;
}
static gboolean
gst_rtp_base_payload_src_event_default (GstRTPBasePayload * rtpbasepayload,
GstEvent * event)
{
GstObject *parent = GST_OBJECT_CAST (rtpbasepayload);
gboolean res = TRUE, forward = TRUE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_UPSTREAM:
{
const GstStructure *s = gst_event_get_structure (event);
if (gst_structure_has_name (s, "GstRTPCollision")) {
guint ssrc = 0;
if (!gst_structure_get_uint (s, "ssrc", &ssrc))
ssrc = -1;
GST_DEBUG_OBJECT (rtpbasepayload, "collided ssrc: %" G_GUINT32_FORMAT,
ssrc);
/* choose another ssrc for our stream */
if (ssrc == rtpbasepayload->current_ssrc) {
GstCaps *caps;
guint suggested_ssrc = 0;
if (gst_structure_get_uint (s, "suggested-ssrc", &suggested_ssrc))
rtpbasepayload->current_ssrc = suggested_ssrc;
while (ssrc == rtpbasepayload->current_ssrc)
rtpbasepayload->current_ssrc = g_random_int ();
caps = gst_pad_get_current_caps (rtpbasepayload->srcpad);
if (caps) {
caps = gst_caps_make_writable (caps);
gst_caps_set_simple (caps,
"ssrc", G_TYPE_UINT, rtpbasepayload->current_ssrc, NULL);
res = gst_pad_set_caps (rtpbasepayload->srcpad, caps);
gst_caps_unref (caps);
}
/* the event was for us */
forward = FALSE;
}
}
break;
}
default:
break;
}
if (forward)
res = gst_pad_event_default (rtpbasepayload->srcpad, parent, event);
else
gst_event_unref (event);
return res;
}
static gboolean
gst_rtp_base_payload_src_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
GstRTPBasePayload *rtpbasepayload;
GstRTPBasePayloadClass *rtpbasepayload_class;
gboolean res = FALSE;
rtpbasepayload = GST_RTP_BASE_PAYLOAD (parent);
rtpbasepayload_class = GST_RTP_BASE_PAYLOAD_GET_CLASS (rtpbasepayload);
if (rtpbasepayload_class->src_event)
res = rtpbasepayload_class->src_event (rtpbasepayload, event);
else
gst_event_unref (event);
return res;
}
static gboolean
gst_rtp_base_payload_query_default (GstRTPBasePayload * rtpbasepayload,
GstPad * pad, GstQuery * query)
{
gboolean res = FALSE;
switch (GST_QUERY_TYPE (query)) {
case GST_QUERY_CAPS:
{
GstRTPBasePayloadClass *rtpbasepayload_class;
GstCaps *filter, *caps;
gst_query_parse_caps (query, &filter);
GST_DEBUG_OBJECT (rtpbasepayload, "getting caps with filter %"
GST_PTR_FORMAT, filter);
rtpbasepayload_class = GST_RTP_BASE_PAYLOAD_GET_CLASS (rtpbasepayload);
if (rtpbasepayload_class->get_caps) {
caps = rtpbasepayload_class->get_caps (rtpbasepayload, pad, filter);
gst_query_set_caps_result (query, caps);
gst_caps_unref (caps);
res = TRUE;
}
break;
}
default:
res =
gst_pad_query_default (pad, GST_OBJECT_CAST (rtpbasepayload), query);
break;
}
return res;
}
static gboolean
gst_rtp_base_payload_query (GstPad * pad, GstObject * parent, GstQuery * query)
{
GstRTPBasePayload *rtpbasepayload;
GstRTPBasePayloadClass *rtpbasepayload_class;
gboolean res = FALSE;
rtpbasepayload = GST_RTP_BASE_PAYLOAD (parent);
rtpbasepayload_class = GST_RTP_BASE_PAYLOAD_GET_CLASS (rtpbasepayload);
if (rtpbasepayload_class->query)
res = rtpbasepayload_class->query (rtpbasepayload, pad, query);
return res;
}
static GstFlowReturn
gst_rtp_base_payload_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer)
{
GstRTPBasePayload *rtpbasepayload;
GstRTPBasePayloadClass *rtpbasepayload_class;
GstFlowReturn ret;
rtpbasepayload = GST_RTP_BASE_PAYLOAD (parent);
rtpbasepayload_class = GST_RTP_BASE_PAYLOAD_GET_CLASS (rtpbasepayload);
if (!rtpbasepayload_class->handle_buffer)
goto no_function;
if (!rtpbasepayload->priv->negotiated)
goto not_negotiated;
if (rtpbasepayload->priv->source_info
|| rtpbasepayload->priv->header_exts->len > 0) {
/* Save a copy of meta (instead of taking an extra reference before
* handle_buffer) to make the meta available when allocating a output
* buffer. */
rtpbasepayload->priv->input_meta_buffer = gst_buffer_new ();
gst_buffer_copy_into (rtpbasepayload->priv->input_meta_buffer, buffer,
GST_BUFFER_COPY_META, 0, -1);
}
if (gst_pad_check_reconfigure (GST_RTP_BASE_PAYLOAD_SRCPAD (rtpbasepayload))) {
if (!gst_rtp_base_payload_negotiate (rtpbasepayload)) {
gst_pad_mark_reconfigure (GST_RTP_BASE_PAYLOAD_SRCPAD (rtpbasepayload));
if (GST_PAD_IS_FLUSHING (GST_RTP_BASE_PAYLOAD_SRCPAD (rtpbasepayload))) {
goto flushing;
} else {
goto negotiate_failed;
}
}
}
ret = rtpbasepayload_class->handle_buffer (rtpbasepayload, buffer);
gst_buffer_replace (&rtpbasepayload->priv->input_meta_buffer, NULL);
return ret;
/* ERRORS */
no_function:
{
GST_ELEMENT_ERROR (rtpbasepayload, STREAM, NOT_IMPLEMENTED, (NULL),
("subclass did not implement handle_buffer function"));
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
not_negotiated:
{
GST_ELEMENT_ERROR (rtpbasepayload, CORE, NEGOTIATION, (NULL),
("No input format was negotiated, i.e. no caps event was received. "
"Perhaps you need a parser or typefind element before the payloader"));
gst_buffer_unref (buffer);
return GST_FLOW_NOT_NEGOTIATED;
}
negotiate_failed:
{
GST_DEBUG_OBJECT (rtpbasepayload, "Not negotiated");
gst_buffer_unref (buffer);
return GST_FLOW_NOT_NEGOTIATED;
}
flushing:
{
GST_DEBUG_OBJECT (rtpbasepayload, "we are flushing");
gst_buffer_unref (buffer);
return GST_FLOW_FLUSHING;
}
}
/**
* gst_rtp_base_payload_set_options:
* @payload: a #GstRTPBasePayload
* @media: the media type (typically "audio" or "video")
* @dynamic: if the payload type is dynamic
* @encoding_name: the encoding name
* @clock_rate: the clock rate of the media
*
* Set the rtp options of the payloader. These options will be set in the caps
* of the payloader. Subclasses must call this method before calling
* gst_rtp_base_payload_push() or gst_rtp_base_payload_set_outcaps().
*/
void
gst_rtp_base_payload_set_options (GstRTPBasePayload * payload,
const gchar * media, gboolean dynamic, const gchar * encoding_name,
guint32 clock_rate)
{
g_return_if_fail (payload != NULL);
g_return_if_fail (clock_rate != 0);
g_free (payload->media);
payload->media = g_strdup (media);
payload->dynamic = dynamic;
g_free (payload->encoding_name);
payload->encoding_name = g_strdup (encoding_name);
payload->clock_rate = clock_rate;
}
static gboolean
copy_fixed (GQuark field_id, const GValue * value, GstStructure * dest)
{
if (gst_value_is_fixed (value)) {
gst_structure_id_set_value (dest, field_id, value);
}
return TRUE;
}
static void
update_max_ptime (GstRTPBasePayload * rtpbasepayload)
{
if (rtpbasepayload->priv->caps_max_ptime != -1 &&
rtpbasepayload->priv->prop_max_ptime != -1)
rtpbasepayload->max_ptime = MIN (rtpbasepayload->priv->caps_max_ptime,
rtpbasepayload->priv->prop_max_ptime);
else if (rtpbasepayload->priv->caps_max_ptime != -1)
rtpbasepayload->max_ptime = rtpbasepayload->priv->caps_max_ptime;
else if (rtpbasepayload->priv->prop_max_ptime != -1)
rtpbasepayload->max_ptime = rtpbasepayload->priv->prop_max_ptime;
else
rtpbasepayload->max_ptime = DEFAULT_MAX_PTIME;
}
static gboolean
_set_caps (GQuark field_id, const GValue * value, GstCaps * caps)
{
gst_caps_set_value (caps, g_quark_to_string (field_id), value);
return TRUE;
}
/**
* gst_rtp_base_payload_set_outcaps_structure:
* @payload: a #GstRTPBasePayload
* @s: (nullable): a #GstStructure with the caps fields
*
* Configure the output caps with the optional fields.
*
* Returns: %TRUE if the caps could be set.
*
* Since: 1.20
*/
gboolean
gst_rtp_base_payload_set_outcaps_structure (GstRTPBasePayload * payload,
GstStructure * s)
{
GstCaps *srccaps;
/* fill in the defaults, their properties cannot be negotiated. */
srccaps = gst_caps_new_simple ("application/x-rtp",
"media", G_TYPE_STRING, payload->media,
"clock-rate", G_TYPE_INT, payload->clock_rate,
"encoding-name", G_TYPE_STRING, payload->encoding_name, NULL);
GST_DEBUG_OBJECT (payload, "defaults: %" GST_PTR_FORMAT, srccaps);
if (s && gst_structure_n_fields (s) > 0) {
gst_structure_foreach (s, (GstStructureForeachFunc) _set_caps, srccaps);
GST_DEBUG_OBJECT (payload, "custom added: %" GST_PTR_FORMAT, srccaps);
}
gst_caps_replace (&payload->priv->subclass_srccaps, srccaps);
gst_caps_unref (srccaps);
return gst_rtp_base_payload_negotiate (payload);
}
/**
* gst_rtp_base_payload_set_outcaps:
* @payload: a #GstRTPBasePayload
* @fieldname: the first field name or %NULL
* @...: field values
*
* Configure the output caps with the optional parameters.
*
* Variable arguments should be in the form field name, field type
* (as a GType), value(s). The last variable argument should be NULL.
*
* Returns: %TRUE if the caps could be set.
*/
gboolean
gst_rtp_base_payload_set_outcaps (GstRTPBasePayload * payload,
const gchar * fieldname, ...)
{
gboolean result;
GstStructure *s = NULL;
if (fieldname) {
va_list varargs;
s = gst_structure_new_empty ("unused");
/* override with custom properties */
va_start (varargs, fieldname);
gst_structure_set_valist (s, fieldname, varargs);
va_end (varargs);
}
result = gst_rtp_base_payload_set_outcaps_structure (payload, s);
gst_clear_structure (&s);
return result;
}
static void
add_and_ref_item (GstRTPHeaderExtension * ext, GPtrArray * ret)
{
g_ptr_array_add (ret, gst_object_ref (ext));
}
static void
remove_item_from (GstRTPHeaderExtension * ext, GPtrArray * ret)
{
g_ptr_array_remove_fast (ret, ext);
}
static void
add_item_to (GstRTPHeaderExtension * ext, GPtrArray * ret)
{
g_ptr_array_add (ret, ext);
}
static void
add_header_ext_to_caps (GstRTPHeaderExtension * ext, GstCaps * caps)
{
if (!gst_rtp_header_extension_set_caps_from_attributes (ext, caps)) {
GST_WARNING ("Failed to set caps from rtp header extension");
}
}
static gboolean
gst_rtp_base_payload_negotiate (GstRTPBasePayload * payload)
{
GstCaps *templ, *peercaps, *srccaps;
GstStructure *s, *d;
gboolean res = TRUE;
payload->priv->caps_max_ptime = DEFAULT_MAX_PTIME;
payload->ptime = 0;
gst_pad_check_reconfigure (payload->srcpad);
templ = gst_pad_get_pad_template_caps (payload->srcpad);
if (payload->priv->subclass_srccaps) {
GstCaps *tmp = gst_caps_intersect (payload->priv->subclass_srccaps,
templ);
gst_caps_unref (templ);
templ = tmp;
}
peercaps = gst_pad_peer_query_caps (payload->srcpad, templ);
if (peercaps == NULL) {
/* no peer caps, just add the other properties */
srccaps = gst_caps_copy (templ);
gst_caps_set_simple (srccaps,
"payload", G_TYPE_INT, GST_RTP_BASE_PAYLOAD_PT (payload),
"ssrc", G_TYPE_UINT, payload->current_ssrc,
"timestamp-offset", G_TYPE_UINT, payload->ts_base,
"seqnum-offset", G_TYPE_UINT, payload->seqnum_base, NULL);
GST_DEBUG_OBJECT (payload, "no peer caps: %" GST_PTR_FORMAT, srccaps);
} else {
GstCaps *temp;
const GValue *value;
gboolean have_pt = FALSE;
gboolean have_ts_offset = FALSE;
gboolean have_seqnum_offset = FALSE;
guint max_ptime, ptime;
/* peer provides caps we can use to fixate. They are already intersected
* with our srccaps, just make them writable */
temp = gst_caps_make_writable (peercaps);
peercaps = NULL;
if (gst_caps_is_empty (temp)) {
gst_caps_unref (temp);
gst_caps_unref (templ);
res = FALSE;
goto out;
}
/* We prefer the pt, timestamp-offset, seqnum-offset from the
* property (if set), or any previously configured value over what
* downstream prefers. Only if downstream can't accept that, or the
* properties were not set, we fall back to choosing downstream's
* preferred value
*
* For ssrc we prefer any value downstream suggests, otherwise
* the property value or as a last resort a random value.
* This difference for ssrc is implemented for retaining backwards
* compatibility with changing rtpsession's internal-ssrc property.
*
* FIXME 2.0: All these properties should go away and be negotiated
* via caps only!
*/
/* try to use the previously set pt, or the one from the property */
if (payload->priv->pt_set || gst_pad_has_current_caps (payload->srcpad)) {
GstCaps *probe_caps = gst_caps_copy (templ);
GstCaps *intersection;
gst_caps_set_simple (probe_caps, "payload", G_TYPE_INT,
GST_RTP_BASE_PAYLOAD_PT (payload), NULL);
intersection = gst_caps_intersect (probe_caps, temp);
if (!gst_caps_is_empty (intersection)) {
GST_LOG_OBJECT (payload, "Using selected pt %d",
GST_RTP_BASE_PAYLOAD_PT (payload));
have_pt = TRUE;
gst_caps_unref (temp);
temp = intersection;
} else {
GST_WARNING_OBJECT (payload, "Can't use selected pt %d",
GST_RTP_BASE_PAYLOAD_PT (payload));
gst_caps_unref (intersection);
}
gst_caps_unref (probe_caps);
}
/* If we got no pt above, select one now */
if (!have_pt) {
gint pt;
/* get first structure */
s = gst_caps_get_structure (temp, 0);
if (gst_structure_get_int (s, "payload", &pt)) {
/* use peer pt */
GST_RTP_BASE_PAYLOAD_PT (payload) = pt;
GST_LOG_OBJECT (payload, "using peer pt %d", pt);
} else {
if (gst_structure_has_field (s, "payload")) {
/* can only fixate if there is a field */
gst_structure_fixate_field_nearest_int (s, "payload",
GST_RTP_BASE_PAYLOAD_PT (payload));
gst_structure_get_int (s, "payload", &pt);
GST_RTP_BASE_PAYLOAD_PT (payload) = pt;
GST_LOG_OBJECT (payload, "using peer pt %d", pt);
} else {
/* no pt field, use the internal pt */
pt = GST_RTP_BASE_PAYLOAD_PT (payload);
gst_structure_set (s, "payload", G_TYPE_INT, pt, NULL);
GST_LOG_OBJECT (payload, "using internal pt %d", pt);
}
}
s = NULL;
}
/* If we got no ssrc above, select one now */
/* get first structure */
s = gst_caps_get_structure (temp, 0);
if (gst_structure_has_field_typed (s, "ssrc", G_TYPE_UINT)) {
value = gst_structure_get_value (s, "ssrc");
payload->current_ssrc = g_value_get_uint (value);
GST_LOG_OBJECT (payload, "using peer ssrc %08x", payload->current_ssrc);
} else {
/* FIXME, fixate_nearest_uint would be even better but we
* don't support uint ranges so how likely is it that anybody
* uses a list of possible ssrcs */
gst_structure_set (s, "ssrc", G_TYPE_UINT, payload->current_ssrc, NULL);
GST_LOG_OBJECT (payload, "using internal ssrc %08x",
payload->current_ssrc);
}
s = NULL;
/* try to select the previously used timestamp-offset, or the one from the property */
if (!payload->priv->ts_offset_random
|| gst_pad_has_current_caps (payload->srcpad)) {
GstCaps *probe_caps = gst_caps_copy (templ);
GstCaps *intersection;
gst_caps_set_simple (probe_caps, "timestamp-offset", G_TYPE_UINT,
payload->ts_base, NULL);
intersection = gst_caps_intersect (probe_caps, temp);
if (!gst_caps_is_empty (intersection)) {
GST_LOG_OBJECT (payload, "Using selected timestamp-offset %u",
payload->ts_base);
gst_caps_unref (temp);
temp = intersection;
have_ts_offset = TRUE;
} else {
GST_WARNING_OBJECT (payload, "Can't use selected timestamp-offset %u",
payload->ts_base);
gst_caps_unref (intersection);
}
gst_caps_unref (probe_caps);
}
/* If we got no timestamp-offset above, select one now */
if (!have_ts_offset) {
/* get first structure */
s = gst_caps_get_structure (temp, 0);
if (gst_structure_has_field_typed (s, "timestamp-offset", G_TYPE_UINT)) {
value = gst_structure_get_value (s, "timestamp-offset");
payload->ts_base = g_value_get_uint (value);
GST_LOG_OBJECT (payload, "using peer timestamp-offset %u",
payload->ts_base);
} else {
/* FIXME, fixate_nearest_uint would be even better but we
* don't support uint ranges so how likely is it that anybody
* uses a list of possible timestamp-offsets */
gst_structure_set (s, "timestamp-offset", G_TYPE_UINT, payload->ts_base,
NULL);
GST_LOG_OBJECT (payload, "using internal timestamp-offset %u",
payload->ts_base);
}
s = NULL;
}
/* try to select the previously used seqnum-offset, or the one from the property */
if (!payload->priv->seqnum_offset_random
|| gst_pad_has_current_caps (payload->srcpad)) {
GstCaps *probe_caps = gst_caps_copy (templ);
GstCaps *intersection;
gst_caps_set_simple (probe_caps, "seqnum-offset", G_TYPE_UINT,
payload->seqnum_base, NULL);
intersection = gst_caps_intersect (probe_caps, temp);
if (!gst_caps_is_empty (intersection)) {
GST_LOG_OBJECT (payload, "Using selected seqnum-offset %u",
payload->seqnum_base);
gst_caps_unref (temp);
temp = intersection;
have_seqnum_offset = TRUE;
} else {
GST_WARNING_OBJECT (payload, "Can't use selected seqnum-offset %u",
payload->seqnum_base);
gst_caps_unref (intersection);
}
gst_caps_unref (probe_caps);
}
/* If we got no seqnum-offset above, select one now */
if (!have_seqnum_offset) {
/* get first structure */
s = gst_caps_get_structure (temp, 0);
if (gst_structure_has_field_typed (s, "seqnum-offset", G_TYPE_UINT)) {
value = gst_structure_get_value (s, "seqnum-offset");
payload->seqnum_base = g_value_get_uint (value);
GST_LOG_OBJECT (payload, "using peer seqnum-offset %u",
payload->seqnum_base);
payload->priv->next_seqnum = payload->seqnum_base;
payload->seqnum = payload->seqnum_base;
payload->priv->seqnum_offset_random = FALSE;
} else {
/* FIXME, fixate_nearest_uint would be even better but we
* don't support uint ranges so how likely is it that anybody
* uses a list of possible seqnum-offsets */
gst_structure_set (s, "seqnum-offset", G_TYPE_UINT,
payload->seqnum_base, NULL);
GST_LOG_OBJECT (payload, "using internal seqnum-offset %u",
payload->seqnum_base);
}
s = NULL;
}
/* now fixate, start by taking the first caps */
temp = gst_caps_truncate (temp);
/* get first structure */
s = gst_caps_get_structure (temp, 0);
if (gst_structure_get_uint (s, "maxptime", &max_ptime))
payload->priv->caps_max_ptime = max_ptime * GST_MSECOND;
if (gst_structure_get_uint (s, "ptime", &ptime))
payload->ptime = ptime * GST_MSECOND;
/* make the target caps by copying over all the fixed fields, removing the
* unfixed fields. */
srccaps = gst_caps_new_empty_simple (gst_structure_get_name (s));
d = gst_caps_get_structure (srccaps, 0);
gst_structure_foreach (s, (GstStructureForeachFunc) copy_fixed, d);
gst_caps_unref (temp);
GST_DEBUG_OBJECT (payload, "with peer caps: %" GST_PTR_FORMAT, srccaps);
}
if (payload->priv->sinkcaps != NULL) {
s = gst_caps_get_structure (payload->priv->sinkcaps, 0);
if (g_str_has_prefix (gst_structure_get_name (s), "video")) {
gboolean has_framerate;
gint num, denom;
GST_DEBUG_OBJECT (payload, "video caps: %" GST_PTR_FORMAT,
payload->priv->sinkcaps);
has_framerate = gst_structure_get_fraction (s, "framerate", &num, &denom);
if (has_framerate && num == 0 && denom == 1) {
has_framerate =
gst_structure_get_fraction (s, "max-framerate", &num, &denom);
}
if (has_framerate) {
gchar str[G_ASCII_DTOSTR_BUF_SIZE];
gdouble framerate;
gst_util_fraction_to_double (num, denom, &framerate);
g_ascii_dtostr (str, G_ASCII_DTOSTR_BUF_SIZE, framerate);
d = gst_caps_get_structure (srccaps, 0);
gst_structure_set (d, "a-framerate", G_TYPE_STRING, str, NULL);
}
GST_DEBUG_OBJECT (payload, "with video caps: %" GST_PTR_FORMAT, srccaps);
}
}
update_max_ptime (payload);
{
/* try to find header extension implementations for the list in the
* caps */
GstStructure *s = gst_caps_get_structure (srccaps, 0);
guint i, j, n_fields = gst_structure_n_fields (s);
GPtrArray *header_exts = g_ptr_array_new_with_free_func (gst_object_unref);
GPtrArray *to_add = g_ptr_array_new ();
GPtrArray *to_remove = g_ptr_array_new ();
GST_OBJECT_LOCK (payload);
g_ptr_array_foreach (payload->priv->header_exts,
(GFunc) add_and_ref_item, header_exts);
GST_OBJECT_UNLOCK (payload);
for (i = 0; i < n_fields; i++) {
const gchar *field_name = gst_structure_nth_field_name (s, i);
if (g_str_has_prefix (field_name, "extmap-")) {
const GValue *val;
const gchar *uri = NULL;
gchar *nptr;
guint64 ext_id;
GstRTPHeaderExtension *ext = NULL;
errno = 0;
ext_id = g_ascii_strtoull (&field_name[strlen ("extmap-")], &nptr, 10);
if (errno != 0 || (ext_id == 0 && field_name == nptr)) {
GST_WARNING_OBJECT (payload, "could not parse id from %s",
field_name);
res = FALSE;
goto ext_out;
}
val = gst_structure_get_value (s, field_name);
if (G_VALUE_HOLDS_STRING (val)) {
uri = g_value_get_string (val);
} else if (GST_VALUE_HOLDS_ARRAY (val)) {
/* the uri is the second value in the array */
const GValue *str = gst_value_array_get_value (val, 1);
if (G_VALUE_HOLDS_STRING (str)) {
uri = g_value_get_string (str);
}
}
if (!uri) {
GST_WARNING_OBJECT (payload, "could not get extmap uri for "
"field %s", field_name);
res = FALSE;
goto ext_out;
}
/* try to find if this extension mapping already exists */
for (j = 0; j < header_exts->len; j++) {
ext = g_ptr_array_index (header_exts, j);
if (gst_rtp_header_extension_get_id (ext) == ext_id) {
if (g_strcmp0 (uri, gst_rtp_header_extension_get_uri (ext)) == 0) {
/* still matching, we're good, set attributes from caps in case
* the caps have been updated */
if (!gst_rtp_header_extension_set_attributes_from_caps (ext,
srccaps)) {
GST_WARNING_OBJECT (payload,
"Failed to configure rtp header " "extension %"
GST_PTR_FORMAT " attributes from caps %" GST_PTR_FORMAT,
ext, srccaps);
res = FALSE;
goto ext_out;
}
break;
} else {
GST_DEBUG_OBJECT (payload, "extension id %" G_GUINT64_FORMAT
"was replaced with a different extension uri "
"original:\'%s' vs \'%s\'", ext_id,
gst_rtp_header_extension_get_uri (ext), uri);
g_ptr_array_add (to_remove, ext);
ext = NULL;
break;
}
} else {
ext = NULL;
}
}
/* if no extension, attempt to request one */
if (!ext) {
GST_DEBUG_OBJECT (payload, "requesting extension for id %"
G_GUINT64_FORMAT " and uri %s", ext_id, uri);
g_signal_emit (payload,
gst_rtp_base_payload_signals[SIGNAL_REQUEST_EXTENSION], 0,
ext_id, uri, &ext);
GST_DEBUG_OBJECT (payload, "request returned extension %p \'%s\' "
"for id %" G_GUINT64_FORMAT " and uri %s", ext,
ext ? GST_OBJECT_NAME (ext) : "", ext_id, uri);
/* We require caller to set the appropriate extension if it's required */
if (ext && gst_rtp_header_extension_get_id (ext) != ext_id) {
g_warning ("\'request-extension\' signal provided an rtp header "
"extension for uri \'%s\' that does not match the requested "
"extension id %" G_GUINT64_FORMAT, uri, ext_id);
gst_clear_object (&ext);
}
if (ext && !gst_rtp_header_extension_set_attributes_from_caps (ext,
srccaps)) {
GST_WARNING_OBJECT (payload,
"Failed to configure rtp header " "extension %"
GST_PTR_FORMAT " attributes from caps %" GST_PTR_FORMAT,
ext, srccaps);
res = FALSE;
g_clear_object (&ext);
goto ext_out;
}
if (ext) {
g_ptr_array_add (to_add, ext);
}
}
}
}
GST_OBJECT_LOCK (payload);
g_ptr_array_foreach (to_remove, (GFunc) remove_item_from,
payload->priv->header_exts);
g_ptr_array_foreach (to_add, (GFunc) add_item_to,
payload->priv->header_exts);
/* add extension information to srccaps */
g_ptr_array_foreach (payload->priv->header_exts,
(GFunc) add_header_ext_to_caps, srccaps);
GST_OBJECT_UNLOCK (payload);
ext_out:
g_ptr_array_unref (to_add);
g_ptr_array_unref (to_remove);
g_ptr_array_unref (header_exts);
}
GST_DEBUG_OBJECT (payload, "configuring caps %" GST_PTR_FORMAT, srccaps);
if (res)
res = gst_pad_set_caps (GST_RTP_BASE_PAYLOAD_SRCPAD (payload), srccaps);
gst_caps_unref (srccaps);
gst_caps_unref (templ);
out:
if (!res)
gst_pad_mark_reconfigure (GST_RTP_BASE_PAYLOAD_SRCPAD (payload));
return res;
}
/**
* gst_rtp_base_payload_is_filled:
* @payload: a #GstRTPBasePayload
* @size: the size of the packet
* @duration: the duration of the packet
*
* Check if the packet with @size and @duration would exceed the configured
* maximum size.
*
* Returns: %TRUE if the packet of @size and @duration would exceed the
* configured MTU or max_ptime.
*/
gboolean
gst_rtp_base_payload_is_filled (GstRTPBasePayload * payload,
guint size, GstClockTime duration)
{
if (size > payload->mtu)
return TRUE;
if (payload->max_ptime != -1 && duration >= payload->max_ptime)
return TRUE;
return FALSE;
}
typedef struct
{
GstRTPBasePayload *payload;
guint32 ssrc;
guint16 seqnum;
guint8 pt;
GstClockTime dts;
GstClockTime pts;
guint64 offset;
guint32 rtptime;
} HeaderData;
static gboolean
find_timestamp (GstBuffer ** buffer, guint idx, gpointer user_data)
{
HeaderData *data = user_data;
data->dts = GST_BUFFER_DTS (*buffer);
data->pts = GST_BUFFER_PTS (*buffer);
data->offset = GST_BUFFER_OFFSET (*buffer);
/* stop when we find a timestamp. We take whatever offset is associated with
* the timestamp (if any) to do perfect timestamps when we need to. */
if (data->pts != -1)
return FALSE;
else
return TRUE;
}
static void
gst_rtp_base_payload_add_extension (GstRTPBasePayload * payload,
GstRTPHeaderExtension * ext)
{
g_return_if_fail (GST_IS_RTP_HEADER_EXTENSION (ext));
g_return_if_fail (gst_rtp_header_extension_get_id (ext) > 0);
/* XXX: check for duplicate ids? */
GST_OBJECT_LOCK (payload);
g_ptr_array_add (payload->priv->header_exts, gst_object_ref (ext));
gst_pad_mark_reconfigure (GST_RTP_BASE_PAYLOAD_SRCPAD (payload));
GST_OBJECT_UNLOCK (payload);
}
static void
gst_rtp_base_payload_clear_extensions (GstRTPBasePayload * payload)
{
GST_OBJECT_LOCK (payload);
g_ptr_array_set_size (payload->priv->header_exts, 0);
GST_OBJECT_UNLOCK (payload);
}
typedef struct
{
GstRTPBasePayload *payload;
GstRTPHeaderExtensionFlags flags;
GstBuffer *output;
guint8 *data;
gsize allocated_size;
gsize written_size;
gsize hdr_unit_size;
gboolean abort;
} HeaderExt;
static void
determine_header_extension_flags_size (GstRTPHeaderExtension * ext,
gpointer user_data)
{
HeaderExt *hdr = user_data;
guint ext_id;
gsize max_size;
hdr->flags &= gst_rtp_header_extension_get_supported_flags (ext);
max_size =
gst_rtp_header_extension_get_max_size (ext,
hdr->payload->priv->input_meta_buffer);
if (max_size > RTP_HEADER_EXT_ONE_BYTE_MAX_SIZE)
hdr->flags &= ~GST_RTP_HEADER_EXTENSION_ONE_BYTE;
if (max_size > RTP_HEADER_EXT_TWO_BYTE_MAX_SIZE)
hdr->flags &= ~GST_RTP_HEADER_EXTENSION_TWO_BYTE;
ext_id = gst_rtp_header_extension_get_id (ext);
if (ext_id > RTP_HEADER_EXT_ONE_BYTE_MAX_ID)
hdr->flags &= ~GST_RTP_HEADER_EXTENSION_ONE_BYTE;
if (ext_id > RTP_HEADER_EXT_TWO_BYTE_MAX_ID)
hdr->flags &= ~GST_RTP_HEADER_EXTENSION_TWO_BYTE;
hdr->allocated_size += max_size;
}
static void
write_header_extension (GstRTPHeaderExtension * ext, gpointer user_data)
{
HeaderExt *hdr = user_data;
gsize remaining =
hdr->allocated_size - hdr->written_size - hdr->hdr_unit_size;
gsize offset = hdr->written_size + hdr->hdr_unit_size;
gsize written;
guint ext_id;
if (hdr->abort)
return;
written = gst_rtp_header_extension_write (ext,
hdr->payload->priv->input_meta_buffer, hdr->flags, hdr->output,
&hdr->data[offset], remaining);
if (written == 0) {
/* extension wrote no data */
return;
} else if (written < 0) {
GST_WARNING_OBJECT (hdr->payload, "%s failed to write extension data",
GST_OBJECT_NAME (ext));
goto error;
} else if (written > remaining) {
/* wrote too much! */
g_error ("Overflow detected writing rtp header extensions. One of the "
"instances likely did not report a large enough maximum size. "
"Memory corruption has occured. Aborting");
goto error;
}
ext_id = gst_rtp_header_extension_get_id (ext);
/* move to the beginning of the extension header */
offset -= hdr->hdr_unit_size;
/* write extension header */
if (hdr->flags & GST_RTP_HEADER_EXTENSION_ONE_BYTE) {
if (written > RTP_HEADER_EXT_ONE_BYTE_MAX_SIZE) {
g_critical ("Amount of data written by %s is larger than allowed with "
"a one byte header.", GST_OBJECT_NAME (ext));
goto error;
}
hdr->data[offset] = ((ext_id & 0x0F) << 4) | ((written - 1) & 0x0F);
} else if (hdr->flags & GST_RTP_HEADER_EXTENSION_TWO_BYTE) {
if (written > RTP_HEADER_EXT_TWO_BYTE_MAX_SIZE) {
g_critical ("Amount of data written by %s is larger than allowed with "
"a two byte header.", GST_OBJECT_NAME (ext));
goto error;
}
hdr->data[offset] = ext_id & 0xFF;
hdr->data[offset + 1] = written & 0xFF;
} else {
g_critical ("Don't know how to write extension data with flags 0x%x!",
hdr->flags);
goto error;
}
hdr->written_size += written + hdr->hdr_unit_size;
return;
error:
hdr->abort = TRUE;
return;
}
static gboolean
set_headers (GstBuffer ** buffer, guint idx, gpointer user_data)
{
HeaderData *data = user_data;
HeaderExt hdrext = { NULL, };
GstRTPBuffer rtp = { NULL, };
if (!gst_rtp_buffer_map (*buffer, GST_MAP_WRITE, &rtp))
goto map_failed;
gst_rtp_buffer_set_ssrc (&rtp, data->ssrc);
gst_rtp_buffer_set_payload_type (&rtp, data->pt);
gst_rtp_buffer_set_seq (&rtp, data->seqnum);
gst_rtp_buffer_set_timestamp (&rtp, data->rtptime);
GST_OBJECT_LOCK (data->payload);
if (data->payload->priv->header_exts->len > 0) {
guint wordlen;
gsize extlen;
guint16 bit_pattern;
/* write header extensions */
hdrext.payload = data->payload;
hdrext.output = *buffer;
/* XXX: pre-calculate these flags and sizes? */
hdrext.flags =
GST_RTP_HEADER_EXTENSION_ONE_BYTE | GST_RTP_HEADER_EXTENSION_TWO_BYTE;
g_ptr_array_foreach (data->payload->priv->header_exts,
(GFunc) determine_header_extension_flags_size, &hdrext);
hdrext.hdr_unit_size = 0;
if (hdrext.flags & GST_RTP_HEADER_EXTENSION_ONE_BYTE) {
/* prefer the one byte header */
hdrext.hdr_unit_size = 1;
/* TODO: support mixed size writing modes, i.e. RFC8285 */
hdrext.flags &= ~GST_RTP_HEADER_EXTENSION_TWO_BYTE;
bit_pattern = 0xBEDE;
} else if (hdrext.flags & GST_RTP_HEADER_EXTENSION_TWO_BYTE) {
hdrext.hdr_unit_size = 2;
bit_pattern = 0x1000;
} else {
goto unsupported_flags;
}
extlen =
hdrext.hdr_unit_size * data->payload->priv->header_exts->len +
hdrext.allocated_size;
wordlen = extlen / 4 + ((extlen % 4) ? 1 : 0);
/* XXX: do we need to add to any existing extension data instead of
* overwriting everything? */
gst_rtp_buffer_set_extension_data (&rtp, bit_pattern, wordlen);
gst_rtp_buffer_get_extension_data (&rtp, NULL, (gpointer) & hdrext.data,
&wordlen);
/* from 32-bit words to bytes */
hdrext.allocated_size = wordlen * 4;
g_ptr_array_foreach (data->payload->priv->header_exts,
(GFunc) write_header_extension, &hdrext);
wordlen = hdrext.written_size / 4 + ((hdrext.written_size % 4) ? 1 : 0);
gst_rtp_buffer_set_extension_data (&rtp, bit_pattern, wordlen);
}
GST_OBJECT_UNLOCK (data->payload);
gst_rtp_buffer_unmap (&rtp);
/* increment the seqnum for each buffer */
data->seqnum++;
return TRUE;
/* ERRORS */
map_failed:
{
GST_ERROR ("failed to map buffer %p", *buffer);
return FALSE;
}
unsupported_flags:
{
GST_OBJECT_UNLOCK (data->payload);
gst_rtp_buffer_unmap (&rtp);
GST_ERROR ("Cannot add rtp header extensions with mixed header types");
return FALSE;
}
}
static gboolean
foreach_metadata_drop (GstBuffer * buffer, GstMeta ** meta, gpointer user_data)
{
GType drop_api_type = (GType) user_data;
const GstMetaInfo *info = (*meta)->info;
if (info->api == drop_api_type)
*meta = NULL;
return TRUE;
}
static gboolean
filter_meta (GstBuffer ** buffer, guint idx, gpointer user_data)
{
return gst_buffer_foreach_meta (*buffer, foreach_metadata_drop,
(gpointer) GST_RTP_SOURCE_META_API_TYPE);
}
/* Updates the SSRC, payload type, seqnum and timestamp of the RTP buffer
* before the buffer is pushed. */
static GstFlowReturn
gst_rtp_base_payload_prepare_push (GstRTPBasePayload * payload,
gpointer obj, gboolean is_list)
{
GstRTPBasePayloadPrivate *priv;
HeaderData data;
if (payload->clock_rate == 0)
goto no_rate;
priv = payload->priv;
/* update first, so that the property is set to the last
* seqnum pushed */
payload->seqnum = priv->next_seqnum;
/* fill in the fields we want to set on all headers */
data.payload = payload;
data.seqnum = payload->seqnum;
data.ssrc = payload->current_ssrc;
data.pt = payload->pt;
/* find the first buffer with a timestamp */
if (is_list) {
data.dts = -1;
data.pts = -1;
data.offset = GST_BUFFER_OFFSET_NONE;
gst_buffer_list_foreach (GST_BUFFER_LIST_CAST (obj), find_timestamp, &data);
} else {
data.dts = GST_BUFFER_DTS (GST_BUFFER_CAST (obj));
data.pts = GST_BUFFER_PTS (GST_BUFFER_CAST (obj));
data.offset = GST_BUFFER_OFFSET (GST_BUFFER_CAST (obj));
}
/* convert to RTP time */
if (priv->perfect_rtptime && data.offset != GST_BUFFER_OFFSET_NONE &&
priv->base_offset != GST_BUFFER_OFFSET_NONE) {
/* generate perfect RTP time by adding together the base timestamp, the
* running time of the first buffer and difference between the offset of the
* first buffer and the offset of the current buffer. */
guint64 offset = data.offset - priv->base_offset;
data.rtptime = payload->ts_base + priv->base_rtime_hz + offset;
GST_LOG_OBJECT (payload,
"Using offset %" G_GUINT64_FORMAT " for RTP timestamp", data.offset);
/* store buffer's running time */
GST_LOG_OBJECT (payload,
"setting running-time to %" G_GUINT64_FORMAT,
data.offset - priv->base_offset);
priv->running_time = priv->base_rtime + data.offset - priv->base_offset;
} else if (GST_CLOCK_TIME_IS_VALID (data.pts)) {
guint64 rtime_ns;
guint64 rtime_hz;
/* no offset, use the gstreamer pts */
if (priv->onvif_no_rate_control || !priv->scale_rtptime)
rtime_ns = gst_segment_to_stream_time (&payload->segment,
GST_FORMAT_TIME, data.pts);
else
rtime_ns =
gst_segment_to_running_time (&payload->segment, GST_FORMAT_TIME,
data.pts);
if (!GST_CLOCK_TIME_IS_VALID (rtime_ns)) {
GST_LOG_OBJECT (payload, "Clipped pts, using base RTP timestamp");
rtime_hz = 0;
} else {
GST_LOG_OBJECT (payload,
"Using running_time %" GST_TIME_FORMAT " for RTP timestamp",
GST_TIME_ARGS (rtime_ns));
rtime_hz =
gst_util_uint64_scale_int (rtime_ns, payload->clock_rate, GST_SECOND);
priv->base_offset = data.offset;
priv->base_rtime_hz = rtime_hz;
}
/* add running_time in clock-rate units to the base timestamp */
data.rtptime = payload->ts_base + rtime_hz;
/* store buffer's running time */
if (priv->perfect_rtptime) {
GST_LOG_OBJECT (payload,
"setting running-time to %" G_GUINT64_FORMAT, rtime_hz);
priv->running_time = rtime_hz;
} else {
GST_LOG_OBJECT (payload,
"setting running-time to %" GST_TIME_FORMAT,
GST_TIME_ARGS (rtime_ns));
priv->running_time = rtime_ns;
}
} else {
GST_LOG_OBJECT (payload,
"Using previous RTP timestamp %" G_GUINT32_FORMAT, payload->timestamp);
/* no timestamp to convert, take previous timestamp */
data.rtptime = payload->timestamp;
}
/* set ssrc, payload type, seq number, caps and rtptime */
/* remove unwanted meta */
if (is_list) {
gst_buffer_list_foreach (GST_BUFFER_LIST_CAST (obj), set_headers, &data);
gst_buffer_list_foreach (GST_BUFFER_LIST_CAST (obj), filter_meta, NULL);
/* sequence number has increased more if this was a buffer list */
payload->seqnum = data.seqnum - 1;
} else {
GstBuffer *buf = GST_BUFFER_CAST (obj);
set_headers (&buf, 0, &data);
filter_meta (&buf, 0, NULL);
}
priv->next_seqnum = data.seqnum;
payload->timestamp = data.rtptime;
GST_LOG_OBJECT (payload, "Preparing to push %s with size %"
G_GSIZE_FORMAT ", seq=%d, rtptime=%u, pts %" GST_TIME_FORMAT,
(is_list) ? "list" : "packet",
(is_list) ? gst_buffer_list_length (GST_BUFFER_LIST_CAST (obj)) :
gst_buffer_get_size (GST_BUFFER (obj)),
payload->seqnum, data.rtptime, GST_TIME_ARGS (data.pts));
if (g_atomic_int_compare_and_exchange (&payload->priv->
notified_first_timestamp, 1, 0)) {
g_object_notify (G_OBJECT (payload), "timestamp");
g_object_notify (G_OBJECT (payload), "seqnum");
}
return GST_FLOW_OK;
/* ERRORS */
no_rate:
{
GST_ELEMENT_ERROR (payload, STREAM, NOT_IMPLEMENTED, (NULL),
("subclass did not specify clock-rate"));
return GST_FLOW_ERROR;
}
}
/**
* gst_rtp_base_payload_push_list:
* @payload: a #GstRTPBasePayload
* @list: a #GstBufferList
*
* Push @list to the peer element of the payloader. The SSRC, payload type,
* seqnum and timestamp of the RTP buffer will be updated first.
*
* This function takes ownership of @list.
*
* Returns: a #GstFlowReturn.
*/
GstFlowReturn
gst_rtp_base_payload_push_list (GstRTPBasePayload * payload,
GstBufferList * list)
{
GstFlowReturn res;
res = gst_rtp_base_payload_prepare_push (payload, list, TRUE);
if (G_LIKELY (res == GST_FLOW_OK)) {
if (G_UNLIKELY (payload->priv->pending_segment)) {
gst_pad_push_event (payload->srcpad, payload->priv->pending_segment);
payload->priv->pending_segment = FALSE;
payload->priv->delay_segment = FALSE;
}
res = gst_pad_push_list (payload->srcpad, list);
} else {
gst_buffer_list_unref (list);
}
return res;
}
/**
* gst_rtp_base_payload_push:
* @payload: a #GstRTPBasePayload
* @buffer: a #GstBuffer
*
* Push @buffer to the peer element of the payloader. The SSRC, payload type,
* seqnum and timestamp of the RTP buffer will be updated first.
*
* This function takes ownership of @buffer.
*
* Returns: a #GstFlowReturn.
*/
GstFlowReturn
gst_rtp_base_payload_push (GstRTPBasePayload * payload, GstBuffer * buffer)
{
GstFlowReturn res;
res = gst_rtp_base_payload_prepare_push (payload, buffer, FALSE);
if (G_LIKELY (res == GST_FLOW_OK)) {
if (G_UNLIKELY (payload->priv->pending_segment)) {
gst_pad_push_event (payload->srcpad, payload->priv->pending_segment);
payload->priv->pending_segment = FALSE;
payload->priv->delay_segment = FALSE;
}
res = gst_pad_push (payload->srcpad, buffer);
} else {
gst_buffer_unref (buffer);
}
return res;
}
/**
* gst_rtp_base_payload_allocate_output_buffer:
* @payload: a #GstRTPBasePayload
* @payload_len: the length of the payload
* @pad_len: the amount of padding
* @csrc_count: the minimum number of CSRC entries
*
* Allocate a new #GstBuffer with enough data to hold an RTP packet with
* minimum @csrc_count CSRCs, a payload length of @payload_len and padding of
* @pad_len. If @payload has #GstRTPBasePayload:source-info %TRUE additional
* CSRCs may be allocated and filled with RTP source information.
*
* Returns: A newly allocated buffer that can hold an RTP packet with given
* parameters.
*
* Since: 1.16
*/
GstBuffer *
gst_rtp_base_payload_allocate_output_buffer (GstRTPBasePayload * payload,
guint payload_len, guint8 pad_len, guint8 csrc_count)
{
GstBuffer *buffer = NULL;
if (payload->priv->input_meta_buffer != NULL) {
GstRTPSourceMeta *meta =
gst_buffer_get_rtp_source_meta (payload->priv->input_meta_buffer);
if (meta != NULL) {
guint total_csrc_count, idx, i;
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
total_csrc_count = csrc_count + meta->csrc_count +
(meta->ssrc_valid ? 1 : 0);
total_csrc_count = MIN (total_csrc_count, 15);
buffer = gst_rtp_buffer_new_allocate (payload_len, pad_len,
total_csrc_count);
gst_rtp_buffer_map (buffer, GST_MAP_READWRITE, &rtp);
/* Skip CSRC fields requested by derived class and fill CSRCs from meta.
* Finally append the SSRC as a new CSRC. */
idx = csrc_count;
for (i = 0; i < meta->csrc_count && idx < 15; i++, idx++)
gst_rtp_buffer_set_csrc (&rtp, idx, meta->csrc[i]);
if (meta->ssrc_valid && idx < 15)
gst_rtp_buffer_set_csrc (&rtp, idx, meta->ssrc);
gst_rtp_buffer_unmap (&rtp);
}
}
if (buffer == NULL)
buffer = gst_rtp_buffer_new_allocate (payload_len, pad_len, csrc_count);
return buffer;
}
static GstStructure *
gst_rtp_base_payload_create_stats (GstRTPBasePayload * rtpbasepayload)
{
GstRTPBasePayloadPrivate *priv;
GstStructure *s;
priv = rtpbasepayload->priv;
s = gst_structure_new ("application/x-rtp-payload-stats",
"clock-rate", G_TYPE_UINT, (guint) rtpbasepayload->clock_rate,
"running-time", G_TYPE_UINT64, priv->running_time,
"seqnum", G_TYPE_UINT, (guint) rtpbasepayload->seqnum,
"timestamp", G_TYPE_UINT, (guint) rtpbasepayload->timestamp,
"ssrc", G_TYPE_UINT, rtpbasepayload->current_ssrc,
"pt", G_TYPE_UINT, rtpbasepayload->pt,
"seqnum-offset", G_TYPE_UINT, (guint) rtpbasepayload->seqnum_base,
"timestamp-offset", G_TYPE_UINT, (guint) rtpbasepayload->ts_base, NULL);
return s;
}
static void
gst_rtp_base_payload_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRTPBasePayload *rtpbasepayload;
GstRTPBasePayloadPrivate *priv;
gint64 val;
rtpbasepayload = GST_RTP_BASE_PAYLOAD (object);
priv = rtpbasepayload->priv;
switch (prop_id) {
case PROP_MTU:
rtpbasepayload->mtu = g_value_get_uint (value);
break;
case PROP_PT:
rtpbasepayload->pt = g_value_get_uint (value);
priv->pt_set = TRUE;
break;
case PROP_SSRC:
val = g_value_get_uint (value);
rtpbasepayload->ssrc = val;
priv->ssrc_random = FALSE;
break;
case PROP_TIMESTAMP_OFFSET:
val = g_value_get_uint (value);
rtpbasepayload->ts_offset = val;
priv->ts_offset_random = FALSE;
break;
case PROP_SEQNUM_OFFSET:
val = g_value_get_int (value);
rtpbasepayload->seqnum_offset = val;
priv->seqnum_offset_random = (val == -1);
GST_DEBUG_OBJECT (rtpbasepayload, "seqnum offset 0x%04x, random %d",
rtpbasepayload->seqnum_offset, priv->seqnum_offset_random);
break;
case PROP_MAX_PTIME:
rtpbasepayload->priv->prop_max_ptime = g_value_get_int64 (value);
update_max_ptime (rtpbasepayload);
break;
case PROP_MIN_PTIME:
rtpbasepayload->min_ptime = g_value_get_int64 (value);
break;
case PROP_PERFECT_RTPTIME:
priv->perfect_rtptime = g_value_get_boolean (value);
break;
case PROP_PTIME_MULTIPLE:
rtpbasepayload->ptime_multiple = g_value_get_int64 (value);
break;
case PROP_SOURCE_INFO:
gst_rtp_base_payload_set_source_info_enabled (rtpbasepayload,
g_value_get_boolean (value));
break;
case PROP_ONVIF_NO_RATE_CONTROL:
priv->onvif_no_rate_control = g_value_get_boolean (value);
break;
case PROP_SCALE_RTPTIME:
priv->scale_rtptime = g_value_get_boolean (value);
break;
case PROP_AUTO_HEADER_EXTENSION:
priv->auto_hdr_ext = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtp_base_payload_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRTPBasePayload *rtpbasepayload;
GstRTPBasePayloadPrivate *priv;
rtpbasepayload = GST_RTP_BASE_PAYLOAD (object);
priv = rtpbasepayload->priv;
switch (prop_id) {
case PROP_MTU:
g_value_set_uint (value, rtpbasepayload->mtu);
break;
case PROP_PT:
g_value_set_uint (value, rtpbasepayload->pt);
break;
case PROP_SSRC:
if (priv->ssrc_random)
g_value_set_uint (value, -1);
else
g_value_set_uint (value, rtpbasepayload->ssrc);
break;
case PROP_TIMESTAMP_OFFSET:
if (priv->ts_offset_random)
g_value_set_uint (value, -1);
else
g_value_set_uint (value, (guint32) rtpbasepayload->ts_offset);
break;
case PROP_SEQNUM_OFFSET:
if (priv->seqnum_offset_random)
g_value_set_int (value, -1);
else
g_value_set_int (value, (guint16) rtpbasepayload->seqnum_offset);
break;
case PROP_MAX_PTIME:
g_value_set_int64 (value, rtpbasepayload->max_ptime);
break;
case PROP_MIN_PTIME:
g_value_set_int64 (value, rtpbasepayload->min_ptime);
break;
case PROP_TIMESTAMP:
g_value_set_uint (value, rtpbasepayload->timestamp);
break;
case PROP_SEQNUM:
g_value_set_uint (value, rtpbasepayload->seqnum);
break;
case PROP_PERFECT_RTPTIME:
g_value_set_boolean (value, priv->perfect_rtptime);
break;
case PROP_PTIME_MULTIPLE:
g_value_set_int64 (value, rtpbasepayload->ptime_multiple);
break;
case PROP_STATS:
g_value_take_boxed (value,
gst_rtp_base_payload_create_stats (rtpbasepayload));
break;
case PROP_SOURCE_INFO:
g_value_set_boolean (value,
gst_rtp_base_payload_is_source_info_enabled (rtpbasepayload));
break;
case PROP_ONVIF_NO_RATE_CONTROL:
g_value_set_boolean (value, priv->onvif_no_rate_control);
break;
case PROP_SCALE_RTPTIME:
g_value_set_boolean (value, priv->scale_rtptime);
break;
case PROP_AUTO_HEADER_EXTENSION:
g_value_set_boolean (value, priv->auto_hdr_ext);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_rtp_base_payload_change_state (GstElement * element,
GstStateChange transition)
{
GstRTPBasePayload *rtpbasepayload;
GstRTPBasePayloadPrivate *priv;
GstStateChangeReturn ret;
rtpbasepayload = GST_RTP_BASE_PAYLOAD (element);
priv = rtpbasepayload->priv;
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_segment_init (&rtpbasepayload->segment, GST_FORMAT_UNDEFINED);
rtpbasepayload->priv->delay_segment = TRUE;
gst_event_replace (&rtpbasepayload->priv->pending_segment, NULL);
if (priv->seqnum_offset_random)
rtpbasepayload->seqnum_base = g_random_int_range (0, G_MAXINT16);
else
rtpbasepayload->seqnum_base = rtpbasepayload->seqnum_offset;
priv->next_seqnum = rtpbasepayload->seqnum_base;
rtpbasepayload->seqnum = rtpbasepayload->seqnum_base;
if (priv->ssrc_random)
rtpbasepayload->current_ssrc = g_random_int ();
else
rtpbasepayload->current_ssrc = rtpbasepayload->ssrc;
if (priv->ts_offset_random)
rtpbasepayload->ts_base = g_random_int ();
else
rtpbasepayload->ts_base = rtpbasepayload->ts_offset;
rtpbasepayload->timestamp = rtpbasepayload->ts_base;
priv->running_time = DEFAULT_RUNNING_TIME;
g_atomic_int_set (&rtpbasepayload->priv->notified_first_timestamp, 1);
priv->base_offset = GST_BUFFER_OFFSET_NONE;
priv->negotiated = FALSE;
gst_caps_replace (&rtpbasepayload->priv->subclass_srccaps, NULL);
gst_caps_replace (&rtpbasepayload->priv->sinkcaps, NULL);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
g_atomic_int_set (&rtpbasepayload->priv->notified_first_timestamp, 1);
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_event_replace (&rtpbasepayload->priv->pending_segment, NULL);
break;
default:
break;
}
return ret;
}
/**
* gst_rtp_base_payload_set_source_info_enabled:
* @payload: a #GstRTPBasePayload
* @enable: whether to add contributing sources to RTP packets
*
* Enable or disable adding contributing sources to RTP packets from
* #GstRTPSourceMeta.
*
* Since: 1.16
**/
void
gst_rtp_base_payload_set_source_info_enabled (GstRTPBasePayload * payload,
gboolean enable)
{
payload->priv->source_info = enable;
}
/**
* gst_rtp_base_payload_is_source_info_enabled:
* @payload: a #GstRTPBasePayload
*
* Queries whether the payloader will add contributing sources (CSRCs) to the
* RTP header from #GstRTPSourceMeta.
*
* Returns: %TRUE if source-info is enabled.
*
* Since: 1.16
**/
gboolean
gst_rtp_base_payload_is_source_info_enabled (GstRTPBasePayload * payload)
{
return payload->priv->source_info;
}
/**
* gst_rtp_base_payload_get_source_count:
* @payload: a #GstRTPBasePayload
* @buffer: (transfer none): a #GstBuffer, typically the buffer to payload
*
* Count the total number of RTP sources found in the meta of @buffer, which
* will be automically added by gst_rtp_base_payload_allocate_output_buffer().
* If #GstRTPBasePayload:source-info is %FALSE the count will be 0.
*
* Returns: The number of sources.
*
* Since: 1.16
**/
guint
gst_rtp_base_payload_get_source_count (GstRTPBasePayload * payload,
GstBuffer * buffer)
{
guint count = 0;
g_return_val_if_fail (buffer != NULL, 0);
if (gst_rtp_base_payload_is_source_info_enabled (payload)) {
GstRTPSourceMeta *meta = gst_buffer_get_rtp_source_meta (buffer);
if (meta != NULL)
count = gst_rtp_source_meta_get_source_count (meta);
}
return count;
}
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