gstreamer/subprojects/gst-plugins-good/gst/rtp/gstrtpreddec.c
Sebastian Dröge b0afaffc5d rtp: In payloaders map the RTP marker flag to the corresponding buffer flag
This allows downstream of a payloader to know the RTP header's marker
flag without first having to map the buffer and parse the RTP header.

Especially inside RTP header extension implementations this can be
useful to decide which packet corresponds to e.g. the last packet of a
video frame.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1776>
2022-02-28 10:13:11 +00:00

668 lines
21 KiB
C

/* GStreamer plugin for forward error correction
* Copyright (C) 2017 Pexip
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author: Mikhail Fludkov <misha@pexip.com>
*/
/**
* SECTION:element-rtpreddec
* @short_description: RTP Redundant Audio Data (RED) decoder
* @title: rtpreddec
*
* Decode Redundant Audio Data (RED) as per RFC 2198.
*
* This element is mostly provided for chrome webrtc compatibility:
* chrome will wrap ulpfec-protected streams in RED packets, and such
* streams need to be unwrapped by this element before being passed on
* to #GstRtpUlpFecDec.
*
* The #GstRtpRedDec:pt property should be set to the expected payload
* types of the RED packets.
*
* When using #GstRtpBin, this element should be inserted through the
* #GstRtpBin::request-aux-receiver signal.
*
* ## Example pipeline
*
* |[
* gst-launch-1.0 udpsrc port=8888 caps="application/x-rtp, payload=96, clock-rate=90000" ! rtpreddec pt=122 ! rtpstorage size-time=220000000 ! rtpssrcdemux ! application/x-rtp, payload=96, clock-rate=90000, media=video, encoding-name=H264 ! rtpjitterbuffer do-lost=1 latency=200 ! rtpulpfecdec pt=122 ! rtph264depay ! avdec_h264 ! videoconvert ! autovideosink
* ]| This example will receive a stream with RED and ULP FEC and try to reconstruct the packets.
*
* See also: #GstRtpRedEnc, #GstWebRTCBin, #GstRtpBin
* Since: 1.14
*/
#include <gst/rtp/gstrtpbuffer.h>
#include "gstrtpelements.h"
#include "rtpredcommon.h"
#include "gstrtpreddec.h"
#include "rtpulpfeccommon.h"
#define RTP_HISTORY_MAX_SIZE (16)
typedef struct
{
guint32 timestamp;
guint16 seq;
} RTPHistItem;
#define RTP_HIST_ITEM_TIMESTAMP(p) ((RTPHistItem *)p)->timestamp
#define RTP_HIST_ITEM_SEQ(p) ((RTPHistItem *)p)->seq
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp"));
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp"));
#define UNDEF_PT -1
#define MIN_PT UNDEF_PT
#define MAX_PT 127
#define DEFAULT_PT UNDEF_PT
GST_DEBUG_CATEGORY_STATIC (gst_rtp_red_dec_debug);
#define GST_CAT_DEFAULT gst_rtp_red_dec_debug
G_DEFINE_TYPE (GstRtpRedDec, gst_rtp_red_dec, GST_TYPE_ELEMENT);
GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (rtpreddec, "rtpreddec", GST_RANK_NONE,
GST_TYPE_RTP_RED_DEC, rtp_element_init (plugin));
enum
{
PROP_0,
PROP_PT,
PROP_RECEIVED,
PROP_PAYLOADS,
};
static RTPHistItem *
rtp_hist_item_alloc (void)
{
return g_slice_new (RTPHistItem);
}
static void
rtp_hist_item_free (gpointer item)
{
g_slice_free (RTPHistItem, item);
}
static gint
gst_rtp_red_history_find_less_or_equal (gconstpointer item,
gconstpointer timestamp)
{
guint32 t = GPOINTER_TO_UINT (timestamp);
gint32 diff = t - RTP_HIST_ITEM_TIMESTAMP (item);
return diff < 0;
}
static gint
gst_rtp_red_history_find_less (gconstpointer item, gconstpointer timestamp)
{
guint32 t = GPOINTER_TO_UINT (timestamp);
gint32 diff = t - RTP_HIST_ITEM_TIMESTAMP (item);
return diff <= 0;
}
static void
gst_rtp_red_history_update (GstRtpRedDec * self, GQueue * rtp_history,
GstRTPBuffer * rtp)
{
RTPHistItem *item;
GList *link, *sibling;
/* If we have not reached MAX number of elements in the history,
* allocate a new link and a new item,
* otherwise reuse the tail (the oldest data) without any reallocations
*/
if (rtp_history->length < RTP_HISTORY_MAX_SIZE) {
item = rtp_hist_item_alloc ();
link = g_list_alloc ();
link->data = item;
} else {
link = g_queue_pop_tail_link (rtp_history);
item = link->data;
}
item->timestamp = gst_rtp_buffer_get_timestamp (rtp);
item->seq = gst_rtp_buffer_get_seq (rtp);
/* Looking for a place to insert new link.
* The queue has newest to oldest rtp timestamps, so in 99% cases
* it is inserted before the head of the queue */
sibling = g_list_find_custom (rtp_history->head,
GUINT_TO_POINTER (item->timestamp),
gst_rtp_red_history_find_less_or_equal);
g_queue_push_nth_link (rtp_history,
g_list_position (rtp_history->head, sibling), link);
}
static gboolean
rtp_red_buffer_is_valid (GstRtpRedDec * self, GstRTPBuffer * red_rtp,
gsize * dst_first_red_payload_offset)
{
guint8 *payload = gst_rtp_buffer_get_payload (red_rtp);
gsize payload_len = gst_rtp_buffer_get_payload_len (red_rtp);
gsize red_hdrs_offset = 0;
guint red_hdrs_checked = 0;
guint redundant_payload_len = 0;
while (TRUE) {
gpointer red_hdr = payload + red_hdrs_offset;
gsize red_hdr_len;
gboolean is_redundant;
++red_hdrs_checked;
/* Can we address the first byte where F bit is located ? */
if (red_hdrs_offset + 1 > payload_len)
goto red_buffer_invalid;
is_redundant = rtp_red_block_is_redundant (red_hdr);
/* Is it the last block? */
if (is_redundant) {
red_hdr_len = rtp_red_block_header_get_length (TRUE);
/* Can we address all the other bytes in RED block header? */
if (red_hdrs_offset + red_hdr_len > payload_len)
goto red_buffer_invalid;
redundant_payload_len += rtp_red_block_get_payload_length (red_hdr);
red_hdrs_offset += red_hdr_len;
} else {
red_hdr_len = rtp_red_block_header_get_length (FALSE);
red_hdrs_offset += red_hdr_len;
break;
}
}
/* Do we have enough data to create redundant packets & main packet. Keep in
* mind that redundant_payload_len contains the length of redundant packets only.
*/
if (red_hdrs_offset + redundant_payload_len >= payload_len)
goto red_buffer_invalid;
*dst_first_red_payload_offset = red_hdrs_offset;
GST_LOG_OBJECT (self, "RED packet has %u blocks", red_hdrs_checked);
return TRUE;
red_buffer_invalid:
GST_WARNING_OBJECT (self, "Received invalid RED packet "
"ssrc=0x%08x pt=%u tstamp=%u seq=%u size=%u, "
"checked %u blocks",
gst_rtp_buffer_get_ssrc (red_rtp),
gst_rtp_buffer_get_payload_type (red_rtp),
gst_rtp_buffer_get_timestamp (red_rtp),
gst_rtp_buffer_get_seq (red_rtp),
gst_rtp_buffer_get_packet_len (red_rtp), red_hdrs_checked);
return FALSE;
}
static gboolean
gst_red_history_lost_seq_num_for_timestamp (GstRtpRedDec * self,
GQueue * rtp_history, guint32 timestamp, guint16 * dst_seq_num)
{
GList *older_sibling = g_list_find_custom (rtp_history->head,
GUINT_TO_POINTER (timestamp),
gst_rtp_red_history_find_less);
RTPHistItem *older;
RTPHistItem *newer;
guint32 timestamp_diff;
gint seq_diff, lost_packet_idx;
if (NULL == older_sibling) {
if (rtp_history->length == RTP_HISTORY_MAX_SIZE)
GST_WARNING_OBJECT (self, "History is too short. "
"Oldest rtp timestamp %u, looking for %u, size %u",
RTP_HIST_ITEM_TIMESTAMP (rtp_history->tail->data),
timestamp, rtp_history->length);
return FALSE;
}
if (NULL == older_sibling->prev) {
GST_WARNING_OBJECT (self, "RED block timestamp offset probably wrong. "
"Latest rtp timestamp %u, looking for %u, size %u",
RTP_HIST_ITEM_TIMESTAMP (rtp_history->head->data),
timestamp, rtp_history->length);
return FALSE;
}
older = older_sibling->data;
newer = older_sibling->prev->data;
/* We know for sure @older has lower timestamp than we are looking for,
* if @newer has the same timestamp, there is no packet loss and we
* don't need to use redundant data */
if (newer->timestamp == timestamp)
return FALSE;
seq_diff = gst_rtp_buffer_compare_seqnum (older->seq, newer->seq);
if (seq_diff <= 1) {
if (seq_diff == 1)
GST_WARNING_OBJECT (self, "RED block timestamp offset is wrong: "
"#%u,%u #%u,%u looking for %u",
older->seq, older->timestamp,
newer->seq, newer->timestamp, timestamp);
else
GST_WARNING_OBJECT (self, "RTP timestamps increasing while "
"sequence numbers decreasing: #%u,%u #%u,%u",
older->seq, older->timestamp, newer->seq, newer->timestamp);
return FALSE;
}
timestamp_diff = newer->timestamp - older->timestamp;
for (lost_packet_idx = 1; lost_packet_idx < seq_diff; ++lost_packet_idx) {
guint32 lost_timestamp = older->timestamp +
lost_packet_idx * timestamp_diff / seq_diff;
if (lost_timestamp == timestamp) {
*dst_seq_num = older->seq + lost_packet_idx;
return TRUE;
}
}
GST_WARNING_OBJECT (self, "Can't find RED block timestamp "
"#%u,%u #%u,%u looking for %u",
older->seq, older->timestamp, newer->seq, newer->timestamp, timestamp);
return FALSE;
}
static GstBuffer *
gst_rtp_red_create_packet (GstRtpRedDec * self, GstRTPBuffer * red_rtp,
gboolean marker, guint8 pt, guint16 seq_num, guint32 timestamp,
gsize red_payload_subbuffer_start, gsize red_payload_subbuffer_len)
{
guint csrc_count = gst_rtp_buffer_get_csrc_count (red_rtp);
GstBuffer *ret = gst_rtp_buffer_new_allocate (0, 0, csrc_count);
GstRTPBuffer ret_rtp = GST_RTP_BUFFER_INIT;
guint i;
if (!gst_rtp_buffer_map (ret, GST_MAP_WRITE, &ret_rtp))
g_assert_not_reached ();
gst_rtp_buffer_set_marker (&ret_rtp, marker);
gst_rtp_buffer_set_payload_type (&ret_rtp, pt);
gst_rtp_buffer_set_seq (&ret_rtp, seq_num);
gst_rtp_buffer_set_timestamp (&ret_rtp, timestamp);
gst_rtp_buffer_set_ssrc (&ret_rtp, gst_rtp_buffer_get_ssrc (red_rtp));
for (i = 0; i < csrc_count; ++i)
gst_rtp_buffer_set_csrc (&ret_rtp, i, gst_rtp_buffer_get_csrc (red_rtp, i));
gst_rtp_buffer_unmap (&ret_rtp);
ret = gst_buffer_append (ret,
gst_rtp_buffer_get_payload_subbuffer (red_rtp,
red_payload_subbuffer_start, red_payload_subbuffer_len));
/* Timestamps, meta, flags from the RED packet should go to main block packet */
gst_buffer_copy_into (ret, red_rtp->buffer, GST_BUFFER_COPY_METADATA, 0, -1);
if (marker)
GST_BUFFER_FLAG_SET (ret, GST_BUFFER_FLAG_MARKER);
return ret;
}
static GstBuffer *
gst_rtp_red_create_from_redundant_block (GstRtpRedDec * self,
GQueue * rtp_history, GstRTPBuffer * red_rtp, gsize * red_hdr_offset,
gsize * red_payload_offset)
{
guint8 *payload = gst_rtp_buffer_get_payload (red_rtp);
guint8 *red_hdr = payload + *red_hdr_offset;
guint32 lost_timestamp = gst_rtp_buffer_get_timestamp (red_rtp) -
rtp_red_block_get_timestamp_offset (red_hdr);
GstBuffer *ret = NULL;
guint16 lost_seq = 0;
if (gst_red_history_lost_seq_num_for_timestamp (self, rtp_history,
lost_timestamp, &lost_seq)) {
GST_LOG_OBJECT (self,
"Recovering from RED packet pt=%u ts=%u seq=%u" " len=%u present",
rtp_red_block_get_payload_type (red_hdr), lost_timestamp, lost_seq,
rtp_red_block_get_payload_length (red_hdr));
ret =
gst_rtp_red_create_packet (self, red_rtp, FALSE,
rtp_red_block_get_payload_type (red_hdr), lost_seq, lost_timestamp,
*red_payload_offset, rtp_red_block_get_payload_length (red_hdr));
GST_BUFFER_FLAG_SET (ret, GST_RTP_BUFFER_FLAG_REDUNDANT);
} else {
GST_LOG_OBJECT (self, "Ignore RED packet pt=%u ts=%u len=%u because already"
" present", rtp_red_block_get_payload_type (red_hdr), lost_timestamp,
rtp_red_block_get_payload_length (red_hdr));
}
*red_hdr_offset += rtp_red_block_header_get_length (TRUE);
*red_payload_offset += rtp_red_block_get_payload_length (red_hdr);
return ret;
}
static GstBuffer *
gst_rtp_red_create_from_main_block (GstRtpRedDec * self,
GstRTPBuffer * red_rtp, gsize red_hdr_offset, gsize * red_payload_offset)
{
guint8 *payload = gst_rtp_buffer_get_payload (red_rtp);
GstBuffer *ret = gst_rtp_red_create_packet (self, red_rtp,
gst_rtp_buffer_get_marker (red_rtp),
rtp_red_block_get_payload_type (payload + red_hdr_offset),
gst_rtp_buffer_get_seq (red_rtp),
gst_rtp_buffer_get_timestamp (red_rtp),
*red_payload_offset, -1);
*red_payload_offset = gst_rtp_buffer_get_payload_len (red_rtp);
GST_LOG_OBJECT (self, "Extracting main payload from RED pt=%u seq=%u ts=%u"
" marker=%u", rtp_red_block_get_payload_type (payload + red_hdr_offset),
gst_rtp_buffer_get_seq (red_rtp), gst_rtp_buffer_get_timestamp (red_rtp),
gst_rtp_buffer_get_marker (red_rtp));
return ret;
}
static GstBuffer *
gst_rtp_red_create_from_block (GstRtpRedDec * self, GQueue * rtp_history,
GstRTPBuffer * red_rtp, gsize * red_hdr_offset, gsize * red_payload_offset)
{
guint8 *payload = gst_rtp_buffer_get_payload (red_rtp);
if (rtp_red_block_is_redundant (payload + (*red_hdr_offset)))
return gst_rtp_red_create_from_redundant_block (self, rtp_history, red_rtp,
red_hdr_offset, red_payload_offset);
return gst_rtp_red_create_from_main_block (self, red_rtp, *red_hdr_offset,
red_payload_offset);
}
static GstFlowReturn
gst_rtp_red_process (GstRtpRedDec * self, GQueue * rtp_history,
GstRTPBuffer * red_rtp, gsize first_red_payload_offset)
{
gsize red_hdr_offset = 0;
gsize red_payload_offset = first_red_payload_offset;
gsize payload_len = gst_rtp_buffer_get_payload_len (red_rtp);
GstFlowReturn ret = GST_FLOW_OK;
do {
GstBuffer *buf = gst_rtp_red_create_from_block (self, rtp_history, red_rtp,
&red_hdr_offset,
&red_payload_offset);
if (buf)
ret = gst_pad_push (self->srcpad, buf);
} while (GST_FLOW_OK == ret && red_payload_offset < payload_len);
return ret;
}
static gboolean
is_red_pt (GstRtpRedDec * self, guint8 pt)
{
gboolean ret;
g_mutex_lock (&self->lock);
if (pt == self->pt) {
ret = TRUE;
goto done;
}
ret = self->payloads
&& g_hash_table_contains (self->payloads, GINT_TO_POINTER (pt));
done:
g_mutex_unlock (&self->lock);
return ret;
}
static GstFlowReturn
gst_rtp_red_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstRtpRedDec *self = GST_RTP_RED_DEC (parent);
GstRTPBuffer irtp = GST_RTP_BUFFER_INIT;
GstFlowReturn ret = GST_FLOW_OK;
gsize first_red_payload_offset = 0;
GQueue *rtp_history;
guint32 ssrc;
if (self->pt == UNDEF_PT && self->payloads == NULL)
return gst_pad_push (self->srcpad, buffer);
if (!gst_rtp_buffer_map (buffer, GST_MAP_READ, &irtp))
return gst_pad_push (self->srcpad, buffer);
ssrc = gst_rtp_buffer_get_ssrc (&irtp);
if (!(rtp_history =
g_hash_table_lookup (self->rtp_histories, GUINT_TO_POINTER (ssrc)))) {
rtp_history = g_queue_new ();
g_hash_table_insert (self->rtp_histories, GUINT_TO_POINTER (ssrc),
rtp_history);
}
gst_rtp_red_history_update (self, rtp_history, &irtp);
if (!is_red_pt (self, gst_rtp_buffer_get_payload_type (&irtp))) {
GST_LOG_RTP_PACKET (self, "rtp header (incoming)", &irtp);
gst_rtp_buffer_unmap (&irtp);
return gst_pad_push (self->srcpad, buffer);
}
self->num_received++;
if (rtp_red_buffer_is_valid (self, &irtp, &first_red_payload_offset)) {
GST_DEBUG_RTP_PACKET (self, "rtp header (red)", &irtp);
ret =
gst_rtp_red_process (self, rtp_history, &irtp,
first_red_payload_offset);
}
gst_rtp_buffer_unmap (&irtp);
gst_buffer_unref (buffer);
return ret;
}
static void
gst_rtp_red_dec_dispose (GObject * obj)
{
GstRtpRedDec *self = GST_RTP_RED_DEC (obj);
g_hash_table_unref (self->rtp_histories);
if (self->payloads) {
g_hash_table_unref (self->payloads);
}
g_mutex_clear (&self->lock);
G_OBJECT_CLASS (gst_rtp_red_dec_parent_class)->dispose (obj);
}
static void
free_rtp_history (GQueue * rtp_history)
{
g_queue_free_full (rtp_history, rtp_hist_item_free);
}
static void
gst_rtp_red_dec_init (GstRtpRedDec * self)
{
GstPadTemplate *pad_template;
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS (self), "src");
self->srcpad = gst_pad_new_from_template (pad_template, "src");
gst_element_add_pad (GST_ELEMENT_CAST (self), self->srcpad);
pad_template =
gst_element_class_get_pad_template (GST_ELEMENT_GET_CLASS (self), "sink");
self->sinkpad = gst_pad_new_from_template (pad_template, "sink");
gst_pad_set_chain_function (self->sinkpad,
GST_DEBUG_FUNCPTR (gst_rtp_red_dec_chain));
GST_PAD_SET_PROXY_CAPS (self->sinkpad);
GST_PAD_SET_PROXY_ALLOCATION (self->sinkpad);
gst_element_add_pad (GST_ELEMENT (self), self->sinkpad);
self->pt = DEFAULT_PT;
self->num_received = 0;
self->rtp_histories =
g_hash_table_new_full (g_direct_hash, g_direct_equal, NULL,
(GDestroyNotify) free_rtp_history);
self->payloads = NULL;
g_mutex_init (&self->lock);
}
static void
gst_rtp_red_dec_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRtpRedDec *self = GST_RTP_RED_DEC (object);
switch (prop_id) {
case PROP_PT:
g_mutex_lock (&self->lock);
self->pt = g_value_get_int (value);
g_mutex_unlock (&self->lock);
break;
case PROP_PAYLOADS:
{
guint i, n_vals;
g_mutex_lock (&self->lock);
if (self->payloads) {
g_hash_table_unref (self->payloads);
self->payloads = NULL;
}
n_vals = gst_value_array_get_size (value);
if (n_vals > 0) {
self->payloads = g_hash_table_new (g_direct_hash, g_direct_equal);
for (i = 0; i < gst_value_array_get_size (value); i++) {
const GValue *val = gst_value_array_get_value (value, i);
g_hash_table_insert (self->payloads,
GINT_TO_POINTER (g_value_get_int (val)), NULL);
}
}
g_mutex_unlock (&self->lock);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
append_payload (gpointer key, gpointer value, GValue * array)
{
GValue v = { 0, };
g_value_init (&v, G_TYPE_INT);
g_value_set_int (&v, GPOINTER_TO_INT (key));
gst_value_array_append_value (array, &v);
g_value_unset (&v);
}
static void
gst_rtp_red_dec_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRtpRedDec *self = GST_RTP_RED_DEC (object);
switch (prop_id) {
case PROP_PT:
g_mutex_lock (&self->lock);
g_value_set_int (value, self->pt);
g_mutex_unlock (&self->lock);
break;
case PROP_RECEIVED:
g_value_set_uint (value, self->num_received);
break;
case PROP_PAYLOADS:
{
g_mutex_lock (&self->lock);
if (self->payloads) {
g_hash_table_foreach (self->payloads, (GHFunc) append_payload, value);
}
g_mutex_unlock (&self->lock);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtp_red_dec_class_init (GstRtpRedDecClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *element_class;
gobject_class = G_OBJECT_CLASS (klass);
element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_template));
gst_element_class_set_metadata (element_class,
"Redundant Audio Data (RED) Decoder",
"Codec/Depayloader/Network/RTP",
"Decode Redundant Audio Data (RED)",
"Hani Mustafa <hani@pexip.com>, Mikhail Fludkov <misha@pexip.com>");
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_rtp_red_dec_set_property);
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_rtp_red_dec_get_property);
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_rtp_red_dec_dispose);
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PT,
g_param_spec_int ("pt", "payload type",
"Payload type FEC packets",
MIN_PT, MAX_PT, DEFAULT_PT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_RECEIVED,
g_param_spec_uint ("received", "Received",
"Count of received packets",
0, G_MAXUINT32, 0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
/**
* rtpreddec:payloads:
*
* All the RED payloads this decoder may encounter
*
* Since: 1.20
*/
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_PAYLOADS,
gst_param_spec_array ("payloads",
"RED payloads",
"All the RED payloads this decoder may encounter",
g_param_spec_int ("pt",
"payload type",
"A RED payload type",
MIN_PT, MAX_PT,
DEFAULT_PT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS),
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
GST_DEBUG_CATEGORY_INIT (gst_rtp_red_dec_debug, "rtpreddec", 0,
"RTP RED Decoder");
}