mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-09 05:38:58 +00:00
773 lines
23 KiB
C
773 lines
23 KiB
C
|
/* 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"));
|
||
|
|
||
|
typedef struct
|
||
|
{
|
||
|
guint16 seqnum;
|
||
|
guint32 timestamp;
|
||
|
GstBuffer *buffer;
|
||
|
} BufferQueueItem;
|
||
|
|
||
|
static void
|
||
|
buffer_queue_item_free (BufferQueueItem * item)
|
||
|
{
|
||
|
gst_buffer_unref (item->buffer);
|
||
|
g_slice_free (BufferQueueItem, item);
|
||
|
}
|
||
|
|
||
|
typedef struct
|
||
|
{
|
||
|
guint32 rtx_ssrc;
|
||
|
guint16 seqnum_base, next_seqnum;
|
||
|
gint clock_rate;
|
||
|
|
||
|
/* history of rtp packets */
|
||
|
GSequence *queue;
|
||
|
} SSRCRtxData;
|
||
|
|
||
|
static SSRCRtxData *
|
||
|
ssrc_rtx_data_new (guint32 rtx_ssrc)
|
||
|
{
|
||
|
SSRCRtxData *data = g_slice_new0 (SSRCRtxData);
|
||
|
|
||
|
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);
|
||
|
|
||
|
return data;
|
||
|
}
|
||
|
|
||
|
static void
|
||
|
ssrc_rtx_data_free (SSRCRtxData * data)
|
||
|
{
|
||
|
g_sequence_free (data->queue);
|
||
|
g_slice_free (SSRCRtxData, 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_slice_free (GstDataQueueItem, data);
|
||
|
}
|
||
|
|
||
|
static gboolean
|
||
|
gst_rist_rtx_send_push_out (GstRistRtxSend * rtx, gpointer object)
|
||
|
{
|
||
|
GstDataQueueItem *data;
|
||
|
gboolean success;
|
||
|
|
||
|
data = g_slice_new0 (GstDataQueueItem);
|
||
|
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, orignal 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 gst_rtp_buffer_compare_seqnum (b->seqnum, a->seqnum);
|
||
|
}
|
||
|
|
||
|
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;
|
||
|
|
||
|
/* update statistics */
|
||
|
++rtx->num_rtx_requests;
|
||
|
|
||
|
data = gst_rist_rtx_send_get_ssrc_data (rtx, ssrc);
|
||
|
|
||
|
search_item.seqnum = seqnum;
|
||
|
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", item->seqnum);
|
||
|
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 && seqnum < item->seqnum) {
|
||
|
GST_DEBUG_OBJECT (rtx, "requested seqnum %u has already been "
|
||
|
"removed from the rtx queue; the first available is %u",
|
||
|
seqnum, item->seqnum);
|
||
|
} 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;
|
||
|
|
||
|
/* 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);
|
||
|
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);
|
||
|
|
||
|
/* add current rtp buffer to queue history */
|
||
|
item = g_slice_new0 (BufferQueueItem);
|
||
|
item->seqnum = seqnum;
|
||
|
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;
|
||
|
}
|