gstreamer/subprojects/gst-plugins-good/gst/rtpmanager/gstrtpst2022-1-fecenc.c
Nirbheek Chauhan d8c4ebccab rtpst2022-1-fecenc: Drain column packets on EOS
Otherwise we won't send the protection packets for the last few
packets when a stream ends.

Also send EOS on the FEC src row pad immediately, and on the FEC src
column pad after draining is complete. This makes it so that the FEC
src pads on rtpbin behave the same way as the RTCP src pads on rtpbin
when EOS is received on the send_rtp_sink pad.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2863>
2022-08-12 12:59:19 +00:00

803 lines
25 KiB
C

/* GStreamer
* Copyright (C) <2020> Mathieu Duponchelle <mathieu@centricular.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 details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-rtpst2022-1-fecenc
* @see_also: #element-rtpst2022-1-fecdec
*
* This element takes as input a media stream and up to two FEC
* streams as described in SMPTE 2022-1: Forward Error Correction
* for Real-Time Video/Audio Transport Over IP Networks, and makes
* use of the FEC packets to recover media packets that may have
* gotten lost.
*
* ## sender / receiver example
*
* ``` shell
* gst-launch-1.0 \
* rtpbin name=rtp fec-encoders='fec,0="rtpst2022-1-fecenc\ rows\=5\ columns\=5";' \
* uridecodebin uri=file:///path/to/video/file ! x264enc key-int-max=60 tune=zerolatency ! \
* queue ! mpegtsmux ! rtpmp2tpay ssrc=0 ! rtp.send_rtp_sink_0 \
* rtp.send_rtp_src_0 ! udpsink host=127.0.0.1 port=5000 \
* rtp.send_fec_src_0_0 ! udpsink host=127.0.0.1 port=5002 async=false \
* rtp.send_fec_src_0_1 ! udpsink host=127.0.0.1 port=5004 async=false
* ```
*
* ``` shell
* gst-launch-1.0 \
* rtpbin latency=500 fec-decoders='fec,0="rtpst2022-1-fecdec\ size-time\=1000000000";' name=rtp \
* udpsrc address=127.0.0.1 port=5002 caps="application/x-rtp, payload=96" ! queue ! rtp.recv_fec_sink_0_0 \
* udpsrc address=127.0.0.1 port=5004 caps="application/x-rtp, payload=96" ! queue ! rtp.recv_fec_sink_0_1 \
* udpsrc address=127.0.0.1 port=5000 caps="application/x-rtp, media=video, clock-rate=90000, encoding-name=mp2t, payload=33" ! \
* queue ! netsim drop-probability=0.05 ! rtp.recv_rtp_sink_0 \
* rtp. ! decodebin ! videoconvert ! queue ! autovideosink
* ```
*
* With the above command line, as the media packet size is constant,
* the fec overhead can be approximated to the number of fec packets
* per 2-d matrix of media packet, here 10 fec packets for each 25
* media packets.
*
* Increasing the number of rows and columns will decrease the overhead,
* but obviously increase the likelihood of recovery failure for lost
* packets on the receiver side.
*
* Since: 1.20
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/base/base.h>
#include <gst/rtp/gstrtpbuffer.h>
#include "gstrtpst2022-1-fecenc.h"
GST_DEBUG_CATEGORY_STATIC (gst_rtpst_2022_1_fecenc_debug);
#define GST_CAT_DEFAULT gst_rtpst_2022_1_fecenc_debug
enum
{
PROP_0,
PROP_COLUMNS,
PROP_ROWS,
PROP_PT,
PROP_ENABLE_COLUMN,
PROP_ENABLE_ROW,
};
#define DEFAULT_ROWS 0
#define DEFAULT_COLUMNS 0
#define DEFAULT_PT 96
#define DEFAULT_ENABLE_COLUMN TRUE
#define DEFAULT_ENABLE_ROW TRUE
typedef struct
{
guint16 target_media_seq; /* The media seqnum we want to send that packet alongside */
guint16 seq_base; /* Only used for logging purposes */
GstBuffer *buffer;
} Item;
typedef struct
{
guint8 *xored_payload;
guint32 xored_timestamp;
guint8 xored_pt;
guint16 xored_payload_len;
gboolean xored_marker;
gboolean xored_padding;
gboolean xored_extension;
guint16 seq_base;
guint16 payload_len;
guint n_packets;
} FecPacket;
struct _GstRTPST_2022_1_FecEncClass
{
GstElementClass class;
};
struct _GstRTPST_2022_1_FecEnc
{
GstElement element;
GstPad *srcpad;
GstPad *sinkpad;
/* These pads do not participate in the flow return of the element,
* which should continue working even if the sending of FEC packets
* fails
*/
GstPad *row_fec_srcpad;
GstPad *column_fec_srcpad;
/* The following fields are only accessed on state change or from the
* streaming thread, and only settable in state < PAUSED */
/* N columns */
guint l;
/* N rows */
guint d;
/* Whether we have pushed initial events on the column FEC source pad */
gboolean column_events_pushed;
/* The current row FEC packet */
FecPacket *row;
/* Tracks the row seqnum */
guint16 row_seq;
/* Whether we have pushed initial events on the row FEC source pad */
gboolean row_events_pushed;
/* These two fields are used to enforce input seqnum consecutiveness,
* and to determine when column FEC packets should be pushed */
gboolean last_media_seqnum_set;
guint16 last_media_seqnum;
/* This field is used to timestamp our FEC packets, we just piggy back */
guint32 last_media_timestamp;
/* The payload type of the FEC packets */
gint pt;
/* The following fields can be changed while PLAYING, and are
* protected with the OBJECT_LOCK
*/
/* Tracks the property, can be changed while PLAYING */
gboolean enable_row;
/* Tracks the property, can be changed while PLAYING */
gboolean enable_column;
/* Array of FecPackets, with size enc->l */
GPtrArray *columns;
/* Index of the current column in the array above */
guint current_column;
/* Tracks the column seqnum */
guint16 column_seq;
/* Column FEC packets must be delayed to make them more resilient
* to loss bursts, we store them here */
GQueue queued_column_packets;
};
#define RTP_CAPS "application/x-rtp"
static GstStaticPadTemplate fec_src_template =
GST_STATIC_PAD_TEMPLATE ("fec_%u",
GST_PAD_SRC,
GST_PAD_SOMETIMES,
GST_STATIC_CAPS (RTP_CAPS));
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (RTP_CAPS));
static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (RTP_CAPS));
#define gst_rtpst_2022_1_fecenc_parent_class parent_class
G_DEFINE_TYPE (GstRTPST_2022_1_FecEnc, gst_rtpst_2022_1_fecenc,
GST_TYPE_ELEMENT);
GST_ELEMENT_REGISTER_DEFINE (rtpst2022_1_fecenc, "rtpst2022-1-fecenc",
GST_RANK_NONE, GST_TYPE_RTPST_2022_1_FECENC);
static void
free_item (Item * item)
{
if (item->buffer)
gst_buffer_unref (item->buffer);
g_free (item);
}
static void
free_fec_packet (FecPacket * packet)
{
if (packet->xored_payload)
g_free (packet->xored_payload);
g_free (packet);
}
static void
_xor_mem (guint8 * restrict dst, const guint8 * restrict src, gsize length)
{
guint i;
for (i = 0; i < (length / sizeof (guint64)); ++i) {
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
GST_WRITE_UINT64_LE (dst,
GST_READ_UINT64_LE (dst) ^ GST_READ_UINT64_LE (src));
#else
GST_WRITE_UINT64_BE (dst,
GST_READ_UINT64_BE (dst) ^ GST_READ_UINT64_BE (src));
#endif
dst += sizeof (guint64);
src += sizeof (guint64);
}
for (i = 0; i < (length % sizeof (guint64)); ++i)
dst[i] ^= src[i];
}
static void
fec_packet_update (FecPacket * fec, GstRTPBuffer * rtp)
{
if (fec->n_packets == 0) {
fec->seq_base = gst_rtp_buffer_get_seq (rtp);
fec->payload_len = gst_rtp_buffer_get_payload_len (rtp);
fec->xored_payload_len = gst_rtp_buffer_get_payload_len (rtp);
fec->xored_pt = gst_rtp_buffer_get_payload_type (rtp);
fec->xored_timestamp = gst_rtp_buffer_get_timestamp (rtp);
fec->xored_marker = gst_rtp_buffer_get_marker (rtp);
fec->xored_padding = gst_rtp_buffer_get_padding (rtp);
fec->xored_extension = gst_rtp_buffer_get_extension (rtp);
fec->xored_payload = g_malloc (sizeof (guint8) * fec->payload_len);
memcpy (fec->xored_payload, gst_rtp_buffer_get_payload (rtp),
fec->payload_len);
} else {
guint plen = gst_rtp_buffer_get_payload_len (rtp);
if (fec->payload_len < plen) {
fec->xored_payload =
g_realloc (fec->xored_payload, sizeof (guint8) * plen);
memset (fec->xored_payload + fec->payload_len, 0,
plen - fec->payload_len);
fec->payload_len = plen;
}
fec->xored_payload_len ^= plen;
fec->xored_pt ^= gst_rtp_buffer_get_payload_type (rtp);
fec->xored_timestamp ^= gst_rtp_buffer_get_timestamp (rtp);
fec->xored_marker ^= gst_rtp_buffer_get_marker (rtp);
fec->xored_padding ^= gst_rtp_buffer_get_padding (rtp);
fec->xored_extension ^= gst_rtp_buffer_get_extension (rtp);
_xor_mem (fec->xored_payload, gst_rtp_buffer_get_payload (rtp), plen);
}
fec->n_packets += 1;
}
static void
push_initial_events (GstRTPST_2022_1_FecEnc * enc, GstPad * pad,
const gchar * id)
{
gchar *stream_id;
GstCaps *caps;
GstSegment segment;
stream_id = gst_pad_create_stream_id (pad, GST_ELEMENT (enc), id);
gst_pad_push_event (pad, gst_event_new_stream_start (stream_id));
g_free (stream_id);
caps = gst_caps_new_simple ("application/x-rtp",
"payload", G_TYPE_UINT, enc->pt, "ssrc", G_TYPE_UINT, 0, NULL);
gst_pad_push_event (pad, gst_event_new_caps (caps));
gst_caps_unref (caps);
gst_segment_init (&segment, GST_FORMAT_TIME);
gst_pad_push_event (pad, gst_event_new_segment (&segment));
}
static void
queue_fec_packet (GstRTPST_2022_1_FecEnc * enc, FecPacket * fec, gboolean row)
{
GstBuffer *buffer = gst_rtp_buffer_new_allocate (fec->payload_len + 16, 0, 0);
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
GstBitWriter bits;
guint8 *data;
gst_rtp_buffer_map (buffer, GST_MAP_WRITE, &rtp);
data = gst_rtp_buffer_get_payload (&rtp);
memset (data, 0x00, 16);
gst_bit_writer_init_with_data (&bits, data, 17, FALSE);
gst_bit_writer_put_bits_uint16 (&bits, fec->seq_base, 16); /* SNBase low bits */
gst_bit_writer_put_bits_uint16 (&bits, fec->xored_payload_len, 16); /* Length Recovery */
gst_bit_writer_put_bits_uint8 (&bits, 1, 1); /* E */
gst_bit_writer_put_bits_uint8 (&bits, fec->xored_pt, 7); /* PT recovery */
gst_bit_writer_put_bits_uint32 (&bits, 0, 24); /* Mask */
gst_bit_writer_put_bits_uint32 (&bits, fec->xored_timestamp, 32); /* TS recovery */
gst_bit_writer_put_bits_uint8 (&bits, 0, 1); /* N */
gst_bit_writer_put_bits_uint8 (&bits, row ? 1 : 0, 1); /* D */
gst_bit_writer_put_bits_uint8 (&bits, 0, 3); /* type */
gst_bit_writer_put_bits_uint8 (&bits, 0, 3); /* index */
gst_bit_writer_put_bits_uint8 (&bits, row ? 1 : enc->l, 8); /* Offset */
gst_bit_writer_put_bits_uint8 (&bits, fec->n_packets, 8); /* NA */
gst_bit_writer_put_bits_uint8 (&bits, 0, 8); /* SNBase ext bits */
memcpy (data + 16, fec->xored_payload, fec->payload_len);
gst_bit_writer_reset (&bits);
gst_rtp_buffer_set_payload_type (&rtp, enc->pt);
gst_rtp_buffer_set_seq (&rtp, row ? enc->row_seq++ : enc->column_seq++);
gst_rtp_buffer_set_marker (&rtp, fec->xored_marker);
gst_rtp_buffer_set_padding (&rtp, fec->xored_padding);
gst_rtp_buffer_set_extension (&rtp, fec->xored_extension);
/* We're sending it out immediately */
if (row)
gst_rtp_buffer_set_timestamp (&rtp, enc->last_media_timestamp);
gst_rtp_buffer_unmap (&rtp);
/* We can send row FEC packets immediately, column packets need
* delaying by L <= delay < L * D
*/
if (row) {
GstFlowReturn ret;
GST_LOG_OBJECT (enc,
"Pushing row FEC packet, seq base: %u, media seqnum: %u",
fec->seq_base, enc->last_media_seqnum);
/* Safe to unlock here */
GST_OBJECT_UNLOCK (enc);
ret = gst_pad_push (enc->row_fec_srcpad, buffer);
GST_OBJECT_LOCK (enc);
if (ret != GST_FLOW_OK && ret != GST_FLOW_FLUSHING)
GST_WARNING_OBJECT (enc->row_fec_srcpad,
"Failed to push row FEC packet: %s", gst_flow_get_name (ret));
} else {
Item *item = g_malloc0 (sizeof (Item));
item->buffer = buffer;
item->seq_base = fec->seq_base;
/* Let's get cute and linearize */
item->target_media_seq =
enc->last_media_seqnum + enc->l - enc->current_column +
enc->d * enc->current_column;
g_queue_push_tail (&enc->queued_column_packets, item);
}
}
static void
gst_2d_fec_push_item_unlocked (GstRTPST_2022_1_FecEnc * enc)
{
GstFlowReturn ret;
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
Item *item = g_queue_pop_head (&enc->queued_column_packets);
GST_LOG_OBJECT (enc,
"Pushing column FEC packet, target media seq: %u, seq base: %u, "
"media seqnum: %u", item->target_media_seq, item->seq_base,
enc->last_media_seqnum);
gst_rtp_buffer_map (item->buffer, GST_MAP_WRITE, &rtp);
gst_rtp_buffer_set_timestamp (&rtp, enc->last_media_timestamp);
gst_rtp_buffer_unmap (&rtp);
GST_OBJECT_UNLOCK (enc);
ret = gst_pad_push (enc->column_fec_srcpad, gst_buffer_ref (item->buffer));
GST_OBJECT_LOCK (enc);
if (ret != GST_FLOW_OK && ret != GST_FLOW_FLUSHING)
GST_WARNING_OBJECT (enc->column_fec_srcpad,
"Failed to push column FEC packet: %s", gst_flow_get_name (ret));
free_item (item);
}
static GstFlowReturn
gst_rtpst_2022_1_fecenc_sink_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer)
{
GstRTPST_2022_1_FecEnc *enc = GST_RTPST_2022_1_FECENC_CAST (parent);
GstFlowReturn ret = GST_FLOW_OK;
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
if (!gst_rtp_buffer_map (buffer, GST_MAP_READ, &rtp)) {
GST_ERROR_OBJECT (enc, "Chained buffer isn't valid RTP");
goto error;
}
if (gst_rtp_buffer_get_ssrc (&rtp) != 0) {
GST_ERROR_OBJECT (enc, "Chained buffer must have SSRC == 0");
goto error;
}
if (enc->last_media_seqnum_set
&& (guint16) (enc->last_media_seqnum + 1) !=
gst_rtp_buffer_get_seq (&rtp)) {
GST_ERROR_OBJECT (enc, "consecutive sequence numbers are required");
goto error;
}
if (!enc->row_events_pushed) {
push_initial_events (enc, enc->row_fec_srcpad, "row-fec");
enc->row_events_pushed = TRUE;
}
if (!enc->column_events_pushed) {
push_initial_events (enc, enc->column_fec_srcpad, "column-fec");
enc->column_events_pushed = TRUE;
}
enc->last_media_timestamp = gst_rtp_buffer_get_timestamp (&rtp);
enc->last_media_seqnum = gst_rtp_buffer_get_seq (&rtp);
enc->last_media_seqnum_set = TRUE;
GST_OBJECT_LOCK (enc);
if (enc->enable_row && enc->l) {
g_assert (enc->row->n_packets < enc->l);
fec_packet_update (enc->row, &rtp);
if (enc->row->n_packets == enc->l) {
queue_fec_packet (enc, enc->row, TRUE);
g_free (enc->row->xored_payload);
memset (enc->row, 0x00, sizeof (FecPacket));
}
}
if (enc->enable_column && enc->l && enc->d) {
FecPacket *column = g_ptr_array_index (enc->columns, enc->current_column);
fec_packet_update (column, &rtp);
if (column->n_packets == enc->d) {
queue_fec_packet (enc, column, FALSE);
g_free (column->xored_payload);
memset (column, 0x00, sizeof (FecPacket));
}
enc->current_column++;
enc->current_column %= enc->l;
}
gst_rtp_buffer_unmap (&rtp);
{
Item *item = g_queue_peek_head (&enc->queued_column_packets);
if (item && item->target_media_seq == enc->last_media_seqnum)
gst_2d_fec_push_item_unlocked (enc);
}
GST_OBJECT_UNLOCK (enc);
ret = gst_pad_push (enc->srcpad, buffer);
done:
return ret;
error:
if (rtp.buffer)
gst_rtp_buffer_unmap (&rtp);
gst_buffer_unref (buffer);
ret = GST_FLOW_ERROR;
goto done;
}
static GstIterator *
gst_rtpst_2022_1_fecenc_iterate_linked_pads (GstPad * pad, GstObject * parent)
{
GstRTPST_2022_1_FecEnc *enc = GST_RTPST_2022_1_FECENC_CAST (parent);
GstPad *otherpad = NULL;
GstIterator *it = NULL;
GValue val = { 0, };
if (pad == enc->srcpad)
otherpad = enc->sinkpad;
else if (pad == enc->sinkpad)
otherpad = enc->srcpad;
if (otherpad) {
g_value_init (&val, GST_TYPE_PAD);
g_value_set_object (&val, otherpad);
it = gst_iterator_new_single (GST_TYPE_PAD, &val);
g_value_unset (&val);
}
return it;
}
static void
gst_rtpst_2022_1_fecenc_reset (GstRTPST_2022_1_FecEnc * enc, gboolean allocate)
{
if (enc->row) {
free_fec_packet (enc->row);
enc->row = NULL;
}
if (enc->columns) {
g_ptr_array_unref (enc->columns);
enc->columns = NULL;
}
if (enc->row_fec_srcpad) {
gst_element_remove_pad (GST_ELEMENT (enc), enc->row_fec_srcpad);
enc->row_fec_srcpad = NULL;
}
if (enc->column_fec_srcpad) {
gst_element_remove_pad (GST_ELEMENT (enc), enc->column_fec_srcpad);
enc->column_fec_srcpad = NULL;
}
g_queue_clear_full (&enc->queued_column_packets, (GDestroyNotify) free_item);
if (allocate) {
guint i;
enc->row = g_malloc0 (sizeof (FecPacket));
enc->columns =
g_ptr_array_new_full (enc->l, (GDestroyNotify) free_fec_packet);
for (i = 0; i < enc->l; i++) {
g_ptr_array_add (enc->columns, g_malloc0 (sizeof (FecPacket)));
}
g_queue_init (&enc->queued_column_packets);
enc->column_fec_srcpad =
gst_pad_new_from_static_template (&fec_src_template, "fec_0");
gst_pad_set_active (enc->column_fec_srcpad, TRUE);
gst_pad_set_iterate_internal_links_function (enc->column_fec_srcpad,
GST_DEBUG_FUNCPTR (gst_rtpst_2022_1_fecenc_iterate_linked_pads));
gst_element_add_pad (GST_ELEMENT (enc), enc->column_fec_srcpad);
enc->row_fec_srcpad =
gst_pad_new_from_static_template (&fec_src_template, "fec_1");
gst_pad_set_active (enc->row_fec_srcpad, TRUE);
gst_pad_set_iterate_internal_links_function (enc->row_fec_srcpad,
GST_DEBUG_FUNCPTR (gst_rtpst_2022_1_fecenc_iterate_linked_pads));
gst_element_add_pad (GST_ELEMENT (enc), enc->row_fec_srcpad);
gst_element_no_more_pads (GST_ELEMENT (enc));
}
enc->current_column = 0;
enc->last_media_seqnum_set = FALSE;
}
static GstStateChangeReturn
gst_rtpst_2022_1_fecenc_change_state (GstElement * element,
GstStateChange transition)
{
GstStateChangeReturn ret;
GstRTPST_2022_1_FecEnc *enc = GST_RTPST_2022_1_FECENC_CAST (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_rtpst_2022_1_fecenc_reset (enc, TRUE);
break;
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_rtpst_2022_1_fecenc_reset (enc, FALSE);
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
return ret;
}
static void
gst_rtpst_2022_1_fecenc_finalize (GObject * object)
{
GstRTPST_2022_1_FecEnc *enc = GST_RTPST_2022_1_FECENC_CAST (object);
gst_rtpst_2022_1_fecenc_reset (enc, FALSE);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_rtpst_2022_1_fecenc_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRTPST_2022_1_FecEnc *enc = GST_RTPST_2022_1_FECENC_CAST (object);
if (GST_STATE (enc) > GST_STATE_READY) {
GST_ERROR_OBJECT (enc,
"rtpst2022-1-fecenc properties can't be changed in PLAYING or PAUSED state");
return;
}
switch (prop_id) {
case PROP_COLUMNS:
enc->l = g_value_get_uint (value);
break;
case PROP_ROWS:
enc->d = g_value_get_uint (value);
break;
case PROP_PT:
enc->pt = g_value_get_int (value);
break;
case PROP_ENABLE_COLUMN:
GST_OBJECT_LOCK (enc);
enc->enable_column = g_value_get_boolean (value);
if (!enc->enable_column) {
guint i;
if (enc->columns) {
for (i = 0; i < enc->l; i++) {
FecPacket *column = g_ptr_array_index (enc->columns, i);
g_free (column->xored_payload);
memset (column, 0x00, sizeof (FecPacket));
}
}
enc->current_column = 0;
enc->column_seq = 0;
g_queue_clear_full (&enc->queued_column_packets,
(GDestroyNotify) free_item);
}
GST_OBJECT_UNLOCK (enc);
break;
case PROP_ENABLE_ROW:
GST_OBJECT_LOCK (enc);
enc->enable_row = g_value_get_boolean (value);
GST_OBJECT_UNLOCK (enc);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtpst_2022_1_fecenc_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRTPST_2022_1_FecEnc *enc = GST_RTPST_2022_1_FECENC_CAST (object);
switch (prop_id) {
case PROP_COLUMNS:
g_value_set_uint (value, enc->l);
break;
case PROP_ROWS:
g_value_set_uint (value, enc->d);
break;
case PROP_PT:
g_value_set_int (value, enc->pt);
break;
case PROP_ENABLE_COLUMN:
GST_OBJECT_LOCK (enc);
g_value_set_boolean (value, enc->enable_column);
GST_OBJECT_UNLOCK (enc);
break;
case PROP_ENABLE_ROW:
GST_OBJECT_LOCK (enc);
g_value_set_boolean (value, enc->enable_row);
GST_OBJECT_UNLOCK (enc);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_2d_fec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstRTPST_2022_1_FecEnc *enc = GST_RTPST_2022_1_FECENC_CAST (parent);
gboolean ret;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_STOP:
gst_rtpst_2022_1_fecenc_reset (enc, TRUE);
break;
case GST_EVENT_EOS:
gst_pad_push_event (enc->row_fec_srcpad, gst_event_ref (event));
GST_OBJECT_LOCK (enc);
while (g_queue_peek_head (&enc->queued_column_packets))
gst_2d_fec_push_item_unlocked (enc);
GST_OBJECT_UNLOCK (enc);
gst_pad_push_event (enc->column_fec_srcpad, gst_event_ref (event));
break;
default:
break;
}
ret = gst_pad_event_default (pad, parent, event);
return ret;
}
static void
gst_rtpst_2022_1_fecenc_class_init (GstRTPST_2022_1_FecEncClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gobject_class->set_property =
GST_DEBUG_FUNCPTR (gst_rtpst_2022_1_fecenc_set_property);
gobject_class->get_property =
GST_DEBUG_FUNCPTR (gst_rtpst_2022_1_fecenc_get_property);
gobject_class->finalize =
GST_DEBUG_FUNCPTR (gst_rtpst_2022_1_fecenc_finalize);
g_object_class_install_property (gobject_class, PROP_COLUMNS,
g_param_spec_uint ("columns", "Columns",
"Number of columns to apply row FEC on, 0=disabled", 0,
255, DEFAULT_COLUMNS,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_READY));
g_object_class_install_property (gobject_class, PROP_ROWS,
g_param_spec_uint ("rows", "Rows",
"Number of rows to apply column FEC on, 0=disabled", 0,
255, DEFAULT_ROWS,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_READY));
g_object_class_install_property (gobject_class, PROP_PT,
g_param_spec_int ("pt", "Payload Type",
"The payload type of FEC packets", 96,
255, DEFAULT_PT,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_READY));
g_object_class_install_property (gobject_class, PROP_ENABLE_COLUMN,
g_param_spec_boolean ("enable-column-fec", "Enable Column FEC",
"Whether the encoder should compute and send column FEC",
DEFAULT_ENABLE_COLUMN,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_PLAYING));
g_object_class_install_property (gobject_class, PROP_ENABLE_ROW,
g_param_spec_boolean ("enable-row-fec", "Enable Row FEC",
"Whether the encoder should compute and send row FEC",
DEFAULT_ENABLE_ROW,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT | G_PARAM_STATIC_STRINGS |
GST_PARAM_MUTABLE_PLAYING));
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_rtpst_2022_1_fecenc_change_state);
gst_element_class_set_static_metadata (gstelement_class,
"SMPTE 2022-1 FEC encoder", "SMPTE 2022-1 FEC encoding",
"performs FEC as described by SMPTE 2022-1",
"Mathieu Duponchelle <mathieu@centricular.com>");
gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
gst_element_class_add_static_pad_template (gstelement_class,
&fec_src_template);
gst_element_class_add_static_pad_template (gstelement_class, &src_template);
GST_DEBUG_CATEGORY_INIT (gst_rtpst_2022_1_fecenc_debug,
"rtpst2022-1-fecenc", 0, "SMPTE 2022-1 FEC encoder element");
}
static void
gst_rtpst_2022_1_fecenc_init (GstRTPST_2022_1_FecEnc * enc)
{
enc->srcpad = gst_pad_new_from_static_template (&src_template, "src");
gst_pad_use_fixed_caps (enc->srcpad);
GST_PAD_SET_PROXY_CAPS (enc->srcpad);
gst_pad_set_iterate_internal_links_function (enc->srcpad,
GST_DEBUG_FUNCPTR (gst_rtpst_2022_1_fecenc_iterate_linked_pads));
gst_element_add_pad (GST_ELEMENT (enc), enc->srcpad);
enc->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
GST_PAD_SET_PROXY_CAPS (enc->sinkpad);
gst_pad_set_chain_function (enc->sinkpad, gst_rtpst_2022_1_fecenc_sink_chain);
gst_pad_set_event_function (enc->sinkpad,
GST_DEBUG_FUNCPTR (gst_2d_fec_sink_event));
gst_pad_set_iterate_internal_links_function (enc->sinkpad,
GST_DEBUG_FUNCPTR (gst_rtpst_2022_1_fecenc_iterate_linked_pads));
gst_element_add_pad (GST_ELEMENT (enc), enc->sinkpad);
enc->d = 0;
enc->l = 0;
}