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qtdemux: Use the tfdt decode time on byte streams when it's significantly different than the time in the last sample

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We consider there's a sifnificant difference when it's larger than on second
or than half the duration of the last processed fragment in case the latter is
larger.

https://bugzilla.gnome.org/show_bug.cgi?id=754230
This commit is contained in:
Enrique Ocaña González 2016-10-24 16:56:31 +00:00 committed by Sebastian Dröge
parent 23f4cd0c4e
commit 69fc488392
1 changed files with 25 additions and 0 deletions
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25
gst/isomp4/qtdemux.c
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@ -95,6 +95,8 @@
#define STREAM_IS_EOS(s) (s->time_position == GST_CLOCK_TIME_NONE)
#define ABSDIFF(x, y) ( (x) > (y) ? ((x) - (y)) : ((y) - (x)) )
GST_DEBUG_CATEGORY (qtdemux_debug);
typedef struct _QtDemuxSegment QtDemuxSegment;
@ -251,6 +253,7 @@ struct _QtDemuxStream
guint32 n_samples_moof; /* sample count in a moof */
guint64 duration_moof; /* duration in timescale of a moof, used for figure out
* the framerate of fragmented format stream */
guint64 duration_last_moof;
guint32 offset_in_sample; /* Offset in the current sample, used for
* streams which have got exceedingly big
@ -1842,6 +1845,7 @@ _create_stream (void)
stream->protection_scheme_info = NULL;
stream->n_samples_moof = 0;
stream->duration_moof = 0;
stream->duration_last_moof = 0;
g_queue_init (&stream->protection_scheme_event_queue);
return stream;
}
@ -2374,6 +2378,7 @@ gst_qtdemux_stream_flush_samples_data (GstQTDemux * qtdemux,
stream->n_samples_moof = 0;
stream->duration_moof = 0;
stream->duration_last_moof = 0;
}
static void
@ -3119,6 +3124,25 @@ qtdemux_parse_trun (GstQTDemux * qtdemux, GstByteReader * trun,
stream->samples[stream->n_samples - 1].timestamp +
stream->samples[stream->n_samples - 1].duration;
/* If this is a GST_FORMAT_BYTES stream and there's a significant
* difference (1 sec.) between decode_ts and timestamp, prefer the
* former */
if (!qtdemux->upstream_format_is_time
&& ABSDIFF (decode_ts, timestamp) >
MAX (stream->duration_last_moof / 2,
GSTTIME_TO_QTSTREAMTIME (stream, GST_SECOND))) {
GST_INFO_OBJECT (qtdemux,
"decode_ts (%" GST_TIME_FORMAT ") and timestamp (%" GST_TIME_FORMAT
") are significantly different (more than %" GST_TIME_FORMAT
"), using decode_ts",
GST_TIME_ARGS (QTSTREAMTIME_TO_GSTTIME (stream, decode_ts)),
GST_TIME_ARGS (QTSTREAMTIME_TO_GSTTIME (stream, timestamp)),
GST_TIME_ARGS (QTSTREAMTIME_TO_GSTTIME (stream,
MAX (stream->duration_last_moof / 2,
GSTTIME_TO_QTSTREAMTIME (stream, GST_SECOND)))));
timestamp = decode_ts;
}
gst_ts = QTSTREAMTIME_TO_GSTTIME (stream, timestamp);
GST_INFO_OBJECT (qtdemux, "first sample ts %" GST_TIME_FORMAT
" (extends previous samples)", GST_TIME_ARGS (gst_ts));
@ -3785,6 +3809,7 @@ qtdemux_parse_moof (GstQTDemux * qtdemux, const guint8 * buffer, guint length,
/* initialise moof sample data */
stream->n_samples_moof = 0;
stream->duration_last_moof = stream->duration_moof;
stream->duration_moof = 0;
/* Track Run node */