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adaptivedemux2: Fix for period switching in live streams

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When playing live, it's possible that one stream reaches
the end of the available playback window and goes to sleep
waiting for a manifest update, and the manifest update
introduces a new period. In that case, the sleeping
stream needs to wake up and go 'properly' EOS before we
can advance the input to the new period.

Accordingly, make sure that a stream's last_ret value
is not marked as EOS if it's just sleeping waiting for a live
manifest update.

Also fix the output loop to go back and re-check if it's
time to switch to the next period after dequeuing and
discarding an EOS event.

https://livesim.dashif.org/livesim/periods_20/testpic_2s/Manifest.mpd

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2895>
This commit is contained in:
Jan Schmidt 2022-08-12 21:57:25 +10:00 committed by GStreamer Marge Bot
parent dbc8a7ab18
commit f4f1819416
2 changed files with 11 additions and 0 deletions
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4
subprojects/gst-plugins-good/ext/adaptivedemux2/gstadaptivedemux-stream.c
View file

@ -1639,6 +1639,9 @@ gst_adaptive_demux2_stream_handle_playlist_eos (GstAdaptiveDemux2Stream *
GST_DEBUG_OBJECT (stream,
"Live playlist EOS - waiting for manifest update");
stream->state = GST_ADAPTIVE_DEMUX2_STREAM_STATE_WAITING_MANIFEST_UPDATE;
/* Clear the stream last_ret EOS state, since we're not actually EOS */
if (stream->last_ret == GST_FLOW_EOS)
stream->last_ret = GST_FLOW_OK;
gst_adaptive_demux2_stream_wants_manifest_update (demux);
return;
}
@ -1733,6 +1736,7 @@ gst_adaptive_demux2_stream_load_a_fragment (GstAdaptiveDemux2Stream * stream)
break; /* all is good, let's go */
case GST_FLOW_EOS:
GST_DEBUG_OBJECT (stream, "EOS, checking to stop download loop");
stream->last_ret = ret;
gst_adaptive_demux2_stream_handle_playlist_eos (stream);
return FALSE;
case GST_ADAPTIVE_DEMUX_FLOW_LOST_SYNC:

7
subprojects/gst-plugins-good/ext/adaptivedemux2/gstadaptivedemux.c
View file

@ -3647,6 +3647,8 @@ restart:
* * Pop next pending data from track and update pending position
*
*/
gboolean need_restart = FALSE;
for (tmp = demux->priv->outputs; tmp; tmp = tmp->next) {
OutputSlot *slot = (OutputSlot *) tmp->data;
GstAdaptiveDemuxTrack *track = slot->track;
@ -3708,6 +3710,8 @@ restart:
gst_event_store_mark_delivered (&track->sticky_events, event);
gst_event_unref (event);
event = NULL;
/* We'll need to re-check if all tracks are empty again above */
need_restart = TRUE;
}
}
@ -3756,6 +3760,9 @@ restart:
if (global_output_position != GST_CLOCK_STIME_NONE)
demux->priv->global_output_position = global_output_position;
if (need_restart)
goto restart;
if (global_output_position == GST_CLOCK_STIME_NONE) {
if (!demux->priv->flushing) {
GST_DEBUG_OBJECT (demux,