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flvdemux: Send gap events if one of the streams falls behind the other by more than 3s

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Same mechanism and threshold as in other demuxers.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/597>
This commit is contained in:
Sebastian Dröge 2020-05-20 13:17:13 +03:00 committed by GStreamer Merge Bot
parent 0bb9880b36
commit 2c278bb2ab
1 changed files with 53 additions and 0 deletions
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53
gst/flv/gstflvdemux.c
View file

@ -1028,6 +1028,51 @@ gst_flv_demux_update_resync (GstFlvDemux * demux, guint32 dts, gboolean discont,
return ret;
}
static void
gst_flv_demux_sync_streams (GstFlvDemux * demux)
{
/* Check if the audio or video stream are more than 3s behind the other
* stream, and if so send a gap event accordingly */
if (demux->audio_pad && GST_CLOCK_TIME_IS_VALID (demux->segment.position) &&
demux->last_audio_pts * GST_MSECOND + demux->audio_time_offset +
3 * GST_SECOND < demux->segment.position) {
GstEvent *event;
guint64 start =
demux->last_audio_pts * GST_MSECOND + demux->audio_time_offset;
guint64 stop = demux->segment.position - 3 * GST_SECOND;
GST_DEBUG_OBJECT (demux,
"Synchronizing audio stream with video stream by advancing time from %"
GST_TIME_FORMAT " to %" GST_TIME_FORMAT, GST_TIME_ARGS (start),
GST_TIME_ARGS (stop));
demux->last_audio_pts = (stop - demux->audio_time_offset) / GST_MSECOND;
event = gst_event_new_gap (start, stop - start);
gst_pad_push_event (demux->audio_pad, event);
}
if (demux->video_pad && GST_CLOCK_TIME_IS_VALID (demux->segment.position) &&
demux->last_video_dts * GST_MSECOND + demux->video_time_offset +
3 * GST_SECOND < demux->segment.position) {
GstEvent *event;
guint64 start =
demux->last_video_dts * GST_MSECOND + demux->video_time_offset;
guint64 stop = demux->segment.position - 3 * GST_SECOND;
GST_DEBUG_OBJECT (demux,
"Synchronizing video stream with audio stream by advancing time from %"
GST_TIME_FORMAT " to %" GST_TIME_FORMAT, GST_TIME_ARGS (start),
GST_TIME_ARGS (stop));
demux->last_video_dts = (stop - demux->video_time_offset) / GST_MSECOND;
event = gst_event_new_gap (start, stop - start);
gst_pad_push_event (demux->video_pad, event);
}
}
static GstFlowReturn
gst_flv_demux_parse_tag_audio (GstFlvDemux * demux, GstBuffer * buffer)
{
@ -1325,6 +1370,10 @@ gst_flv_demux_parse_tag_audio (GstFlvDemux * demux, GstBuffer * buffer)
ret = gst_flow_combiner_update_pad_flow (demux->flowcombiner,
demux->audio_pad, ret);
if (ret == GST_FLOW_OK) {
gst_flv_demux_sync_streams (demux);
}
beach:
gst_buffer_unmap (buffer, &map);
@ -1760,6 +1809,10 @@ gst_flv_demux_parse_tag_video (GstFlvDemux * demux, GstBuffer * buffer)
ret = gst_flow_combiner_update_pad_flow (demux->flowcombiner,
demux->video_pad, ret);
if (ret == GST_FLOW_OK) {
gst_flv_demux_sync_streams (demux);
}
beach:
gst_buffer_unmap (buffer, &map);
return ret;