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GST-Tensordecoder-ov_ep/subprojects/gst-plugins-bad/gst/rist/gstristrtxsend.c

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/* RIST Retransmission sender element for GStreamer
*
* gsristprtxsend.c:
*
* Copyright (C) 2013-2019 Collabora Ltd.
* @author Julien Isorce <julien.isorce@collabora.co.uk>
* Nicoas Dufresne <nicolas.dufresne@collabora.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-ristrtxsend
* @title: ristrtxsend
* @see_also: ristrtxreceive
*
* This elements replies to custom events 'GstRTPRetransmissionRequest' and
* when available sends in RIST form the lost packet. This element is intented
* to be used by ristsink element.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/rtp/gstrtpbuffer.h>
#include <gst/base/gstdataqueue.h>
#include "gstrist.h"
GST_DEBUG_CATEGORY_STATIC (gst_rist_rtx_send_debug);
#define GST_CAT_DEFAULT gst_rist_rtx_send_debug
#define DEFAULT_MAX_SIZE_TIME 0
#define DEFAULT_MAX_SIZE_PACKETS 100
enum
{
PROP_0,
PROP_MAX_SIZE_TIME,
PROP_MAX_SIZE_PACKETS,
PROP_NUM_RTX_REQUESTS,
PROP_NUM_RTX_PACKETS,
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp")
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, " "clock-rate = (int) [1, MAX]")
);
struct _GstRistRtxSend
{
GstElement element;
/* pad */
GstPad *sinkpad;
GstPad *srcpad;
/* rtp packets that will be pushed out */
GstDataQueue *queue;
/* ssrc -> SSRCRtxData */
GHashTable *ssrc_data;
/* rtx ssrc -> master ssrc */
GHashTable *rtx_ssrcs;
/* buffering control properties */
guint max_size_time;
guint max_size_packets;
/* statistics */
guint num_rtx_requests;
guint num_rtx_packets;
};
static gboolean gst_rist_rtx_send_queue_check_full (GstDataQueue * queue,
guint visible, guint bytes, guint64 time, gpointer checkdata);
static gboolean gst_rist_rtx_send_src_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static gboolean gst_rist_rtx_send_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event);
static GstFlowReturn gst_rist_rtx_send_chain (GstPad * pad, GstObject * parent,
GstBuffer * buffer);
static GstFlowReturn gst_rist_rtx_send_chain_list (GstPad * pad,
GstObject * parent, GstBufferList * list);
static void gst_rist_rtx_send_src_loop (GstRistRtxSend * rtx);
static gboolean gst_rist_rtx_send_activate_mode (GstPad * pad,
GstObject * parent, GstPadMode mode, gboolean active);
static GstStateChangeReturn gst_rist_rtx_send_change_state (GstElement *
element, GstStateChange transition);
static void gst_rist_rtx_send_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rist_rtx_send_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_rist_rtx_send_finalize (GObject * object);
G_DEFINE_TYPE_WITH_CODE (GstRistRtxSend, gst_rist_rtx_send, GST_TYPE_ELEMENT,
GST_DEBUG_CATEGORY_INIT (gst_rist_rtx_send_debug, "ristrtxsend", 0,
"RIST retransmission sender"));
GST_ELEMENT_REGISTER_DEFINE (ristrtxsend, "ristrtxsend", GST_RANK_NONE,
GST_TYPE_RIST_RTX_SEND);
typedef struct
{
guint32 extseqnum;
guint32 timestamp;
GstBuffer *buffer;
} BufferQueueItem;
static void
buffer_queue_item_free (BufferQueueItem * item)
{
gst_buffer_unref (item->buffer);
g_free (item);
}
typedef struct
{
guint32 rtx_ssrc;
guint16 seqnum_base, next_seqnum;
gint clock_rate;
/* history of rtp packets */
GSequence *queue;
guint32 max_extseqnum;
/* current rtcp app seqnum extension */
gboolean has_seqnum_ext;
guint16 seqnum_ext;
} SSRCRtxData;
static SSRCRtxData *
ssrc_rtx_data_new (guint32 rtx_ssrc)
{
SSRCRtxData *data = g_new0 (SSRCRtxData, 1);
data->rtx_ssrc = rtx_ssrc;
data->next_seqnum = data->seqnum_base = g_random_int_range (0, G_MAXUINT16);
data->queue = g_sequence_new ((GDestroyNotify) buffer_queue_item_free);
data->max_extseqnum = -1;
return data;
}
static void
ssrc_rtx_data_free (SSRCRtxData * data)
{
g_sequence_free (data->queue);
g_free (data);
}
static void
gst_rist_rtx_send_class_init (GstRistRtxSendClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->get_property = gst_rist_rtx_send_get_property;
gobject_class->set_property = gst_rist_rtx_send_set_property;
gobject_class->finalize = gst_rist_rtx_send_finalize;
g_object_class_install_property (gobject_class, PROP_MAX_SIZE_TIME,
g_param_spec_uint ("max-size-time", "Max Size Time",
"Amount of ms to queue (0 = unlimited)", 0, G_MAXUINT,
DEFAULT_MAX_SIZE_TIME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MAX_SIZE_PACKETS,
g_param_spec_uint ("max-size-packets", "Max Size Packets",
"Amount of packets to queue (0 = unlimited)", 0, G_MAXINT16,
DEFAULT_MAX_SIZE_PACKETS,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_NUM_RTX_REQUESTS,
g_param_spec_uint ("num-rtx-requests", "Num RTX Requests",
"Number of retransmission events received", 0, G_MAXUINT,
0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_NUM_RTX_PACKETS,
g_param_spec_uint ("num-rtx-packets", "Num RTX Packets",
" Number of retransmission packets sent", 0, G_MAXUINT,
0, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
gst_element_class_add_static_pad_template (gstelement_class, &src_factory);
gst_element_class_add_static_pad_template (gstelement_class, &sink_factory);
gst_element_class_set_static_metadata (gstelement_class,
"RIST Retransmission Sender", "Codec",
"Retransmit RTP packets when needed, according to VSF TR-06-1",
"Nicolas Dufresne <nicolas.dufresne@collabora.com>");
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_rist_rtx_send_change_state);
}
static void
gst_rist_rtx_send_reset (GstRistRtxSend * rtx)
{
GST_OBJECT_LOCK (rtx);
gst_data_queue_flush (rtx->queue);
g_hash_table_remove_all (rtx->ssrc_data);
g_hash_table_remove_all (rtx->rtx_ssrcs);
rtx->num_rtx_requests = 0;
rtx->num_rtx_packets = 0;
GST_OBJECT_UNLOCK (rtx);
}
static void
gst_rist_rtx_send_finalize (GObject * object)
{
GstRistRtxSend *rtx = GST_RIST_RTX_SEND (object);
g_hash_table_unref (rtx->ssrc_data);
g_hash_table_unref (rtx->rtx_ssrcs);
g_object_unref (rtx->queue);
G_OBJECT_CLASS (gst_rist_rtx_send_parent_class)->finalize (object);
}
static void
gst_rist_rtx_send_init (GstRistRtxSend * rtx)
{
GstElementClass *klass = GST_ELEMENT_GET_CLASS (rtx);
rtx->srcpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"src"), "src");
GST_PAD_SET_PROXY_CAPS (rtx->srcpad);
GST_PAD_SET_PROXY_ALLOCATION (rtx->srcpad);
gst_pad_set_event_function (rtx->srcpad,
GST_DEBUG_FUNCPTR (gst_rist_rtx_send_src_event));
gst_pad_set_activatemode_function (rtx->srcpad,
GST_DEBUG_FUNCPTR (gst_rist_rtx_send_activate_mode));
gst_element_add_pad (GST_ELEMENT (rtx), rtx->srcpad);
rtx->sinkpad =
gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
"sink"), "sink");
GST_PAD_SET_PROXY_CAPS (rtx->sinkpad);
GST_PAD_SET_PROXY_ALLOCATION (rtx->sinkpad);
gst_pad_set_event_function (rtx->sinkpad,
GST_DEBUG_FUNCPTR (gst_rist_rtx_send_sink_event));
gst_pad_set_chain_function (rtx->sinkpad,
GST_DEBUG_FUNCPTR (gst_rist_rtx_send_chain));
gst_pad_set_chain_list_function (rtx->sinkpad,
GST_DEBUG_FUNCPTR (gst_rist_rtx_send_chain_list));
gst_element_add_pad (GST_ELEMENT (rtx), rtx->sinkpad);
rtx->queue = gst_data_queue_new (gst_rist_rtx_send_queue_check_full, NULL,
NULL, rtx);
rtx->ssrc_data = g_hash_table_new_full (g_direct_hash, g_direct_equal,
NULL, (GDestroyNotify) ssrc_rtx_data_free);
rtx->rtx_ssrcs = g_hash_table_new (g_direct_hash, g_direct_equal);
rtx->max_size_time = DEFAULT_MAX_SIZE_TIME;
rtx->max_size_packets = DEFAULT_MAX_SIZE_PACKETS;
}
static void
gst_rist_rtx_send_set_flushing (GstRistRtxSend * rtx, gboolean flush)
{
GST_OBJECT_LOCK (rtx);
gst_data_queue_set_flushing (rtx->queue, flush);
gst_data_queue_flush (rtx->queue);
GST_OBJECT_UNLOCK (rtx);
}
static gboolean
gst_rist_rtx_send_queue_check_full (GstDataQueue * queue,
guint visible, guint bytes, guint64 time, gpointer checkdata)
{
return FALSE;
}
static void
gst_rtp_rtx_data_queue_item_free (gpointer item)
{
GstDataQueueItem *data = item;
if (data->object)
gst_mini_object_unref (data->object);
g_free (data);
}
static gboolean
gst_rist_rtx_send_push_out (GstRistRtxSend * rtx, gpointer object)
{
GstDataQueueItem *data;
gboolean success;
data = g_new0 (GstDataQueueItem, 1);
data->object = GST_MINI_OBJECT (object);
data->size = 1;
data->duration = 1;
data->visible = TRUE;
data->destroy = gst_rtp_rtx_data_queue_item_free;
success = gst_data_queue_push (rtx->queue, data);
if (!success)
data->destroy (data);
return success;
}
static SSRCRtxData *
gst_rist_rtx_send_get_ssrc_data (GstRistRtxSend * rtx, guint32 ssrc)
{
SSRCRtxData *data;
guint32 rtx_ssrc = 0;
data = g_hash_table_lookup (rtx->ssrc_data, GUINT_TO_POINTER (ssrc));
if (!data) {
/* See 5.3.2 Retransmitted Packets, original packet have SSRC LSB set to
* 0, while RTX packet have LSB set to 1 */
rtx_ssrc = ssrc + 1;
data = ssrc_rtx_data_new (rtx_ssrc);
g_hash_table_insert (rtx->ssrc_data, GUINT_TO_POINTER (ssrc), data);
g_hash_table_insert (rtx->rtx_ssrcs, GUINT_TO_POINTER (rtx_ssrc),
GUINT_TO_POINTER (ssrc));
}
return data;
}
/*
* see RIST TR-06-1 5.3.2 Retransmitted Packets
*
* RIST simply resend the packet verbatim, with SSRC+1, the defaults SSRC always
* have the LSB set to 0, so we can differentiate the retransmission and the
* normal packet.
*/
static GstBuffer *
gst_rtp_rist_buffer_new (GstRistRtxSend * rtx, GstBuffer * buffer, guint32 ssrc)
{
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
buffer = gst_buffer_copy_deep (buffer);
gst_rtp_buffer_map (buffer, GST_MAP_WRITE, &rtp);
gst_rtp_buffer_set_ssrc (&rtp, ssrc + 1);
gst_rtp_buffer_unmap (&rtp);
return buffer;
}
static gint
buffer_queue_items_cmp (BufferQueueItem * a, BufferQueueItem * b,
gpointer user_data)
{
/* gst_rtp_buffer_compare_seqnum returns the opposite of what we want,
* it returns negative when seqnum1 > seqnum2 and we want negative
* when b > a, i.e. a is smaller, so it comes first in the sequence */
return a->extseqnum - b->extseqnum;
}
static gboolean
gst_rist_rtx_send_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
{
GstRistRtxSend *rtx = GST_RIST_RTX_SEND (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CUSTOM_UPSTREAM:
{
const GstStructure *s = gst_event_get_structure (event);
/* This event usually comes from the downstream gstrtpsession */
if (gst_structure_has_name (s, "GstRTPRetransmissionRequest")) {
guint seqnum = 0;
guint ssrc = 0;
GstBuffer *rtx_buf = NULL;
/* retrieve seqnum of the packet that need to be retransmitted */
if (!gst_structure_get_uint (s, "seqnum", &seqnum))
seqnum = -1;
/* retrieve ssrc of the packet that need to be retransmitted */
if (!gst_structure_get_uint (s, "ssrc", &ssrc))
ssrc = -1;
GST_DEBUG_OBJECT (rtx, "got rtx request for seqnum: %u, ssrc: %X",
seqnum, ssrc);
GST_OBJECT_LOCK (rtx);
/* check if request is for us */
if (g_hash_table_contains (rtx->ssrc_data, GUINT_TO_POINTER (ssrc))) {
SSRCRtxData *data;
GSequenceIter *iter;
BufferQueueItem search_item;
guint32 extseqnum;
/* update statistics */
++rtx->num_rtx_requests;
data = gst_rist_rtx_send_get_ssrc_data (rtx, ssrc);
if (data->has_seqnum_ext) {
extseqnum = data->seqnum_ext << 16 | seqnum;
} else {
guint32 max_extseqnum = data->max_extseqnum;
extseqnum = gst_rist_rtp_ext_seq (&max_extseqnum, seqnum);
}
search_item.extseqnum = extseqnum;
iter = g_sequence_lookup (data->queue, &search_item,
(GCompareDataFunc) buffer_queue_items_cmp, NULL);
if (iter) {
BufferQueueItem *item = g_sequence_get (iter);
GST_LOG_OBJECT (rtx, "found %u (%u:%u)", item->extseqnum,
item->extseqnum >> 16, item->extseqnum & 0xFFFF);
rtx_buf = gst_rtp_rist_buffer_new (rtx, item->buffer, ssrc);
}
#ifndef GST_DISABLE_DEBUG
else {
BufferQueueItem *item = NULL;
iter = g_sequence_get_begin_iter (data->queue);
if (!g_sequence_iter_is_end (iter))
item = g_sequence_get (iter);
if (item && extseqnum < item->extseqnum) {
GST_DEBUG_OBJECT (rtx, "requested seqnum %u has already been "
"removed from the rtx queue; the first available is %u",
seqnum, item->extseqnum);
} else {
GST_WARNING_OBJECT (rtx, "requested seqnum %u has not been "
"transmitted yet in the original stream; either the remote end "
"is not configured correctly, or the source is too slow",
seqnum);
}
#endif
}
}
GST_OBJECT_UNLOCK (rtx);
if (rtx_buf)
gst_rist_rtx_send_push_out (rtx, rtx_buf);
gst_event_unref (event);
return TRUE;
}
break;
}
default:
break;
}
return gst_pad_event_default (pad, parent, event);
}
static gboolean
gst_rist_rtx_send_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
GstRistRtxSend *rtx = GST_RIST_RTX_SEND (parent);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_FLUSH_START:
gst_pad_push_event (rtx->srcpad, event);
gst_rist_rtx_send_set_flushing (rtx, TRUE);
gst_pad_pause_task (rtx->srcpad);
return TRUE;
case GST_EVENT_FLUSH_STOP:
gst_pad_push_event (rtx->srcpad, event);
gst_rist_rtx_send_set_flushing (rtx, FALSE);
gst_pad_start_task (rtx->srcpad,
(GstTaskFunction) gst_rist_rtx_send_src_loop, rtx, NULL);
return TRUE;
case GST_EVENT_EOS:
GST_INFO_OBJECT (rtx, "Got EOS - enqueueing it");
gst_rist_rtx_send_push_out (rtx, event);
return TRUE;
case GST_EVENT_CAPS:
{
GstCaps *caps;
GstStructure *s;
guint ssrc;
gint payload;
SSRCRtxData *data;
gst_event_parse_caps (event, &caps);
s = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_uint (s, "ssrc", &ssrc))
ssrc = -1;
if (!gst_structure_get_int (s, "payload", &payload))
payload = -1;
if (payload == -1)
GST_WARNING_OBJECT (rtx, "No payload in caps");
GST_OBJECT_LOCK (rtx);
data = gst_rist_rtx_send_get_ssrc_data (rtx, ssrc);
GST_DEBUG_OBJECT (rtx,
"got caps for payload: %d->%d, ssrc: %u : %" GST_PTR_FORMAT,
payload, ssrc, data->rtx_ssrc, caps);
gst_structure_get_int (s, "clock-rate", &data->clock_rate);
/* The session might need to know the RTX ssrc */
caps = gst_caps_copy (caps);
gst_caps_set_simple (caps, "rtx-ssrc", G_TYPE_UINT, data->rtx_ssrc,
"rtx-seqnum-offset", G_TYPE_UINT, data->seqnum_base, NULL);
GST_DEBUG_OBJECT (rtx, "got clock-rate from caps: %d for ssrc: %u",
data->clock_rate, ssrc);
GST_OBJECT_UNLOCK (rtx);
gst_event_unref (event);
event = gst_event_new_caps (caps);
gst_caps_unref (caps);
break;
}
default:
break;
}
return gst_pad_event_default (pad, parent, event);
}
/* like rtp_jitter_buffer_get_ts_diff() */
static guint32
gst_rist_rtx_send_get_ts_diff (SSRCRtxData * data)
{
guint64 high_ts, low_ts;
BufferQueueItem *high_buf, *low_buf;
guint32 result;
high_buf =
g_sequence_get (g_sequence_iter_prev (g_sequence_get_end_iter
(data->queue)));
low_buf = g_sequence_get (g_sequence_get_begin_iter (data->queue));
if (!high_buf || !low_buf || high_buf == low_buf)
return 0;
high_ts = high_buf->timestamp;
low_ts = low_buf->timestamp;
/* it needs to work if ts wraps */
if (high_ts >= low_ts) {
result = (guint32) (high_ts - low_ts);
} else {
result = (guint32) (high_ts + G_MAXUINT32 + 1 - low_ts);
}
/* return value in ms instead of clock ticks */
return (guint32) gst_util_uint64_scale_int (result, 1000, data->clock_rate);
}
/* Must be called with lock */
static void
process_buffer (GstRistRtxSend * rtx, GstBuffer * buffer)
{
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
BufferQueueItem *item;
SSRCRtxData *data;
guint16 seqnum;
guint32 ssrc, rtptime;
guint16 bits;
gpointer extdata;
guint extlen;
gboolean has_seqnum_ext = FALSE;
guint32 extseqnum;
/* read the information we want from the buffer */
gst_rtp_buffer_map (buffer, GST_MAP_READ, &rtp);
seqnum = gst_rtp_buffer_get_seq (&rtp);
ssrc = gst_rtp_buffer_get_ssrc (&rtp);
rtptime = gst_rtp_buffer_get_timestamp (&rtp);
if (gst_rtp_buffer_get_extension_data (&rtp, &bits, &extdata, &extlen)) {
/* Has header extension */
has_seqnum_ext = (bits >> 14) & 1; /* E */
if (extlen != 1)
has_seqnum_ext = FALSE;
if (has_seqnum_ext)
extseqnum = GST_READ_UINT16_BE (extdata) << 16 | seqnum;
}
gst_rtp_buffer_unmap (&rtp);
GST_TRACE_OBJECT (rtx, "Processing buffer seqnum: %u, ssrc: %X", seqnum,
ssrc);
data = gst_rist_rtx_send_get_ssrc_data (rtx, ssrc);
if (has_seqnum_ext)
data->max_extseqnum = MAX (data->max_extseqnum, extseqnum);
else
extseqnum = gst_rist_rtp_ext_seq (&data->max_extseqnum, seqnum);
/* add current rtp buffer to queue history */
item = g_new0 (BufferQueueItem, 1);
item->extseqnum = extseqnum;
item->timestamp = rtptime;
item->buffer = gst_buffer_ref (buffer);
g_sequence_append (data->queue, item);
/* remove oldest packets from history if they are too many */
if (rtx->max_size_packets) {
while (g_sequence_get_length (data->queue) > rtx->max_size_packets)
g_sequence_remove (g_sequence_get_begin_iter (data->queue));
}
if (rtx->max_size_time) {
while (gst_rist_rtx_send_get_ts_diff (data) > rtx->max_size_time)
g_sequence_remove (g_sequence_get_begin_iter (data->queue));
}
}
static GstFlowReturn
gst_rist_rtx_send_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
{
GstRistRtxSend *rtx = GST_RIST_RTX_SEND (parent);
GstFlowReturn ret;
GST_OBJECT_LOCK (rtx);
process_buffer (rtx, buffer);
GST_OBJECT_UNLOCK (rtx);
ret = gst_pad_push (rtx->srcpad, buffer);
return ret;
}
static gboolean
process_buffer_from_list (GstBuffer ** buffer, guint idx, gpointer user_data)
{
process_buffer (user_data, *buffer);
return TRUE;
}
static GstFlowReturn
gst_rist_rtx_send_chain_list (GstPad * pad, GstObject * parent,
GstBufferList * list)
{
GstRistRtxSend *rtx = GST_RIST_RTX_SEND (parent);
GstFlowReturn ret;
GST_OBJECT_LOCK (rtx);
gst_buffer_list_foreach (list, process_buffer_from_list, rtx);
GST_OBJECT_UNLOCK (rtx);
ret = gst_pad_push_list (rtx->srcpad, list);
return ret;
}
static void
gst_rist_rtx_send_src_loop (GstRistRtxSend * rtx)
{
GstDataQueueItem *data;
if (gst_data_queue_pop (rtx->queue, &data)) {
GST_LOG_OBJECT (rtx, "pushing rtx buffer %p", data->object);
if (G_LIKELY (GST_IS_BUFFER (data->object))) {
GST_OBJECT_LOCK (rtx);
/* Update statistics just before pushing. */
rtx->num_rtx_packets++;
GST_OBJECT_UNLOCK (rtx);
gst_pad_push (rtx->srcpad, GST_BUFFER (data->object));
} else if (GST_IS_EVENT (data->object)) {
gst_pad_push_event (rtx->srcpad, GST_EVENT (data->object));
/* after EOS, we should not send any more buffers,
* even if there are more requests coming in */
if (GST_EVENT_TYPE (data->object) == GST_EVENT_EOS) {
gst_rist_rtx_send_set_flushing (rtx, TRUE);
}
} else {
g_assert_not_reached ();
}
data->object = NULL; /* we no longer own that object */
data->destroy (data);
} else {
GST_LOG_OBJECT (rtx, "flushing");
gst_pad_pause_task (rtx->srcpad);
}
}
static gboolean
gst_rist_rtx_send_activate_mode (GstPad * pad, GstObject * parent,
GstPadMode mode, gboolean active)
{
GstRistRtxSend *rtx = GST_RIST_RTX_SEND (parent);
gboolean ret = FALSE;
switch (mode) {
case GST_PAD_MODE_PUSH:
if (active) {
gst_rist_rtx_send_set_flushing (rtx, FALSE);
ret = gst_pad_start_task (rtx->srcpad,
(GstTaskFunction) gst_rist_rtx_send_src_loop, rtx, NULL);
} else {
gst_rist_rtx_send_set_flushing (rtx, TRUE);
ret = gst_pad_stop_task (rtx->srcpad);
}
GST_INFO_OBJECT (rtx, "activate_mode: active %d, ret %d", active, ret);
break;
default:
break;
}
return ret;
}
static void
gst_rist_rtx_send_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstRistRtxSend *rtx = GST_RIST_RTX_SEND (object);
switch (prop_id) {
case PROP_MAX_SIZE_TIME:
GST_OBJECT_LOCK (rtx);
g_value_set_uint (value, rtx->max_size_time);
GST_OBJECT_UNLOCK (rtx);
break;
case PROP_MAX_SIZE_PACKETS:
GST_OBJECT_LOCK (rtx);
g_value_set_uint (value, rtx->max_size_packets);
GST_OBJECT_UNLOCK (rtx);
break;
case PROP_NUM_RTX_REQUESTS:
GST_OBJECT_LOCK (rtx);
g_value_set_uint (value, rtx->num_rtx_requests);
GST_OBJECT_UNLOCK (rtx);
break;
case PROP_NUM_RTX_PACKETS:
GST_OBJECT_LOCK (rtx);
g_value_set_uint (value, rtx->num_rtx_packets);
GST_OBJECT_UNLOCK (rtx);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rist_rtx_send_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstRistRtxSend *rtx = GST_RIST_RTX_SEND (object);
switch (prop_id) {
case PROP_MAX_SIZE_TIME:
GST_OBJECT_LOCK (rtx);
rtx->max_size_time = g_value_get_uint (value);
GST_OBJECT_UNLOCK (rtx);
break;
case PROP_MAX_SIZE_PACKETS:
GST_OBJECT_LOCK (rtx);
rtx->max_size_packets = g_value_get_uint (value);
GST_OBJECT_UNLOCK (rtx);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_rist_rtx_send_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstRistRtxSend *rtx = GST_RIST_RTX_SEND (element);
ret =
GST_ELEMENT_CLASS (gst_rist_rtx_send_parent_class)->change_state (element,
transition);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_rist_rtx_send_reset (rtx);
break;
default:
break;
}
return ret;
}
void
gst_rist_rtx_send_set_extseqnum (GstRistRtxSend * rtx, guint32 ssrc,
guint16 seqnum_ext)
{
SSRCRtxData *data;
GST_OBJECT_LOCK (rtx);
data = g_hash_table_lookup (rtx->ssrc_data, GUINT_TO_POINTER (ssrc));
if (data) {
data->has_seqnum_ext = TRUE;
data->seqnum_ext = seqnum_ext;
}
GST_OBJECT_UNLOCK (rtx);
}
void
gst_rist_rtx_send_clear_extseqnum (GstRistRtxSend * rtx, guint32 ssrc)
{
SSRCRtxData *data;
GST_OBJECT_LOCK (rtx);
data = g_hash_table_lookup (rtx->ssrc_data, GUINT_TO_POINTER (ssrc));
if (data)
data->has_seqnum_ext = FALSE;
GST_OBJECT_UNLOCK (rtx);
}
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