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qtdemux: Forward upstream time-format segment without mapping

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Sample table based segment event (genereted by qtdemux) could break
presentation timeline. For example, qtdemux should not modify upstream
time format segment (e.g., adaptivedemux use case)

https://bugzilla.gnome.org/show_bug.cgi?id=796480
This commit is contained in:
Seungha Yang 2018-06-01 21:08:10 +09:00 committed by Thibault Saunier
parent 418a6270e5
commit 6b29a4507e
1 changed files with 25 additions and 12 deletions
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37
gst/isomp4/qtdemux.c
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@ -1038,21 +1038,25 @@ static void
gst_qtdemux_push_pending_newsegment (GstQTDemux * qtdemux)
{
if (G_UNLIKELY (qtdemux->need_segment)) {
GstClockTime min_ts;
GstEvent *newsegment;
if (!gst_qtdemux_streams_have_samples (qtdemux)) {
/* No samples yet, can't decide on segment.start */
GST_DEBUG_OBJECT (qtdemux, "No samples yet, postponing segment event");
return;
if (!qtdemux->upstream_format_is_time) {
GstClockTime min_ts;
if (!gst_qtdemux_streams_have_samples (qtdemux)) {
/* No samples yet, can't decide on segment.start */
GST_DEBUG_OBJECT (qtdemux, "No samples yet, postponing segment event");
return;
}
min_ts = gst_qtdemux_streams_get_first_sample_ts (qtdemux);
/* have_samples() above should guarantee we have a valid time */
g_assert (GST_CLOCK_TIME_IS_VALID (min_ts));
qtdemux->segment.start = min_ts;
}
min_ts = gst_qtdemux_streams_get_first_sample_ts (qtdemux);
/* have_samples() above should guarantee we have a valid time */
g_assert (GST_CLOCK_TIME_IS_VALID (min_ts));
qtdemux->segment.start = min_ts;
newsegment = gst_event_new_segment (&qtdemux->segment);
if (qtdemux->segment_seqnum != GST_SEQNUM_INVALID)
gst_event_set_seqnum (newsegment, qtdemux->segment_seqnum);
@ -6900,7 +6904,16 @@ gst_qtdemux_process_adapter (GstQTDemux * demux, gboolean force)
demux->got_moov = TRUE;
demux->need_segment = TRUE;
gst_qtdemux_map_and_push_segments (demux, &demux->segment);
/* Forward upstream driven time format segment, and also do not try
* to map edit list with the upstream time format segment.
* It's upstream element's role (the origin of time format segment)
*/
if (demux->upstream_format_is_time)
gst_qtdemux_check_send_pending_segment (demux);
else
gst_qtdemux_map_and_push_segments (demux, &demux->segment);
if (demux->exposed)
demux->need_segment = FALSE;