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matroskademux: Parse and handle CodecDelay, SeekPreroll and DiscardPadding

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=727305
This commit is contained in:
Sebastian Dröge 2015-11-03 12:40:15 +02:00
parent 52122f9206
commit d620ca4740
1 changed files with 70 additions and 0 deletions
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70
gst/matroska/matroska-demux.c
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@ -940,6 +940,34 @@ gst_matroska_demux_add_stream (GstMatroskaDemux * demux, GstEbmlRead * ebml)
break;
}
/* codec delay */
case GST_MATROSKA_ID_CODECDELAY:{
guint64 num;
if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
break;
context->codec_delay = num;
GST_DEBUG_OBJECT (demux, "CodecDelay: %" GST_TIME_FORMAT,
GST_TIME_ARGS (num));
break;
}
/* codec delay */
case GST_MATROSKA_ID_SEEKPREROLL:{
guint64 num;
if ((ret = gst_ebml_read_uint (ebml, &id, &num)) != GST_FLOW_OK)
break;
context->seek_preroll = num;
GST_DEBUG_OBJECT (demux, "SeekPreroll: %" GST_TIME_FORMAT,
GST_TIME_ARGS (num));
break;
}
/* name of this track */
case GST_MATROSKA_ID_TRACKNAME:{
gchar *text;
@ -3162,6 +3190,7 @@ gst_matroska_demux_parse_blockgroup_or_simpleblock (GstMatroskaDemux * demux,
gboolean readblock = FALSE;
guint32 id;
guint64 block_duration = -1;
gint64 block_discardpadding = 0;
GstBuffer *buf = NULL;
GstMapInfo map;
gint stream_num = -1, n, laces = 0;
@ -3326,6 +3355,13 @@ gst_matroska_demux_parse_blockgroup_or_simpleblock (GstMatroskaDemux * demux,
break;
}
case GST_MATROSKA_ID_DISCARDPADDING:{
ret = gst_ebml_read_sint (ebml, &id, &block_discardpadding);
GST_DEBUG_OBJECT (demux, "DiscardPadding: %" GST_STIME_FORMAT,
GST_STIME_ARGS (block_discardpadding));
break;
}
case GST_MATROSKA_ID_REFERENCEBLOCK:{
ret = gst_ebml_read_sint (ebml, &id, &referenceblock);
GST_DEBUG_OBJECT (demux, "ReferenceBlock: %" G_GINT64_FORMAT,
@ -3703,6 +3739,40 @@ gst_matroska_demux_parse_blockgroup_or_simpleblock (GstMatroskaDemux * demux,
Therefore, create an aligned copy if necessary. */
sub = gst_matroska_demux_align_buffer (demux, sub, stream->alignment);
if (!strcmp (stream->codec_id, GST_MATROSKA_CODEC_ID_AUDIO_OPUS)) {
guint64 start_clip = 0, end_clip = 0;
/* Codec delay is part of the timestamps */
if (GST_BUFFER_PTS_IS_VALID (sub) && stream->codec_delay) {
if (GST_BUFFER_PTS (sub) > stream->codec_delay) {
GST_BUFFER_PTS (sub) -= stream->codec_delay;
} else {
GST_BUFFER_PTS (sub) = 0;
start_clip =
gst_util_uint64_scale_round (stream->codec_delay, 48000,
GST_SECOND);
if (GST_BUFFER_DURATION_IS_VALID (sub)) {
if (GST_BUFFER_DURATION (sub) > stream->codec_delay)
GST_BUFFER_DURATION (sub) -= stream->codec_delay;
else
GST_BUFFER_DURATION (sub) = 0;
}
}
}
if (block_discardpadding) {
end_clip =
gst_util_uint64_scale_round (block_discardpadding, 48000,
GST_SECOND);
}
if (start_clip || end_clip) {
gst_buffer_add_audio_clipping_meta (sub, GST_FORMAT_DEFAULT,
start_clip, end_clip);
}
}
if (GST_BUFFER_PTS_IS_VALID (sub)) {
stream->pos = GST_BUFFER_PTS (sub);
if (GST_BUFFER_DURATION_IS_VALID (sub))