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rtprtxsend: keep important buffer information in a private structure

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This is to avoid mapping a buffer every time we need to read a seqnum
or a timestamp.
This commit is contained in:
George Kiagiadakis 2013-11-02 15:21:08 +02:00 committed by Wim Taymans
parent f7277db9e4
commit 920a55532c
1 changed files with 42 additions and 24 deletions
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66
gst/rtpmanager/gstrtprtxsend.c
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@ -91,6 +91,20 @@ static void gst_rtp_rtx_send_finalize (GObject * object);
G_DEFINE_TYPE (GstRtpRtxSend, gst_rtp_rtx_send, GST_TYPE_ELEMENT);
typedef struct
{
guint16 seqnum;
guint32 timestamp;
GstBuffer *buffer;
} BufferQueueItem;
static void
buffer_queue_item_free (BufferQueueItem * item)
{
gst_buffer_unref (item->buffer);
g_free (item);
}
static void
gst_rtp_rtx_send_class_init (GstRtpRtxSendClass * klass)
{
@ -149,7 +163,7 @@ static void
gst_rtp_rtx_send_reset (GstRtpRtxSend * rtx, gboolean full)
{
g_mutex_lock (&rtx->lock);
g_queue_foreach (rtx->queue, (GFunc) gst_buffer_unref, NULL);
g_queue_foreach (rtx->queue, (GFunc) buffer_queue_item_free, NULL);
g_queue_clear (rtx->queue);
g_list_foreach (rtx->pending, (GFunc) gst_buffer_unref, NULL);
g_list_free (rtx->pending);
@ -233,26 +247,18 @@ typedef struct
/* traverse queue history and try to find the buffer that the
* requested seqnum */
static void
push_seqnum (GstBuffer * buffer, RTXData * data)
push_seqnum (BufferQueueItem * item, RTXData * data)
{
GstRtpRtxSend *rtx = data->rtx;
GstRTPBuffer rtpbuffer = GST_RTP_BUFFER_INIT;
guint16 seqnum;
if (data->found)
return;
if (!gst_rtp_buffer_map (buffer, GST_MAP_READ, &rtpbuffer))
return;
seqnum = gst_rtp_buffer_get_seq (&rtpbuffer);
gst_rtp_buffer_unmap (&rtpbuffer);
/* data->seqnum comes from the request */
if (seqnum == data->seqnum) {
if (item->seqnum == data->seqnum) {
data->found = TRUE;
GST_DEBUG_OBJECT (rtx, "found %" G_GUINT16_FORMAT, seqnum);
rtx->pending = g_list_prepend (rtx->pending, gst_buffer_ref (buffer));
GST_DEBUG_OBJECT (rtx, "found %" G_GUINT16_FORMAT, item->seqnum);
rtx->pending = g_list_prepend (rtx->pending, gst_buffer_ref (item->buffer));
}
}
@ -431,42 +437,54 @@ gst_rtp_rtx_send_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
GstFlowReturn ret = GST_FLOW_ERROR;
GList *pending = NULL;
GstRTPBuffer rtp = GST_RTP_BUFFER_INIT;
guint seqnum = 0;
BufferQueueItem *item;
guint16 seqnum;
guint32 ssrc, rtptime;
rtx = GST_RTP_RTX_SEND (parent);
/* 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);
g_mutex_lock (&rtx->lock);
/* retrievemaster stream ssrc */
gst_rtp_buffer_map (buffer, GST_MAP_READ, &rtp);
rtx->master_ssrc = gst_rtp_buffer_get_ssrc (&rtp);
seqnum = gst_rtp_buffer_get_seq (&rtp);
gst_rtp_buffer_unmap (&rtp);
/* retrieve master stream ssrc */
rtx->master_ssrc = ssrc;
/* check if our initial aux ssrc is equal to master */
if (rtx->rtx_ssrc == rtx->master_ssrc)
choose_ssrc (rtx);
/* add current rtp buffer to queue history */
g_queue_push_head (rtx->queue, gst_buffer_ref (buffer));
item = g_new0 (BufferQueueItem, 1);
item->seqnum = seqnum;
item->timestamp = rtptime;
item->buffer = gst_buffer_ref (buffer);
g_queue_push_head (rtx->queue, item);
/* remove oldest packets from history if they are too many */
if (rtx->max_size_packets) {
while (g_queue_get_length (rtx->queue) > rtx->max_size_packets)
gst_buffer_unref (g_queue_pop_tail (rtx->queue));
buffer_queue_item_free (g_queue_pop_tail (rtx->queue));
}
/* within lock, get packets that have to be retransmited */
pending = rtx->pending;
rtx->pending = NULL;
/* assume we will succeed to retransmit those packets */
/* update statistics - assume we will succeed to retransmit those packets */
rtx->num_rtx_packets += g_list_length (pending);
/* transfer payload type while holding the lock */
rtx->rtx_payload_type = rtx->rtx_payload_type_pending;
/* no need to hold the lock to push rtx packets */
g_mutex_unlock (&rtx->lock);
/* no need to hold the lock to push rtx packets */
/* retransmit requested packets */
g_list_foreach (pending, (GFunc) do_push, rtx);
g_list_foreach (pending, (GFunc) gst_buffer_unref, NULL);
g_list_free (pending);