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mxfdemux: Use keyframe information from index table segments if available

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We don't implement keyframe detection for all codecs and this will allow us to
implement better seeking.
This commit is contained in:
Sebastian Dröge 2015-12-09 16:28:53 +02:00
parent b504672fc4
commit 6e06f8c936
1 changed files with 32 additions and 1 deletions
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33
gst/mxf/mxfdemux.c
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@ -1728,6 +1728,36 @@ gst_mxf_demux_handle_generic_container_essence_element (GstMXFDemux * demux,
if (outbuf)
keyframe = !GST_BUFFER_FLAG_IS_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
/* Prefer keyframe information from index tables over everything else */
if (demux->index_tables && outbuf) {
GList *l;
GstMXFDemuxIndexTable *index_table = NULL;
for (l = demux->index_tables; l; l = l->next) {
GstMXFDemuxIndexTable *tmp = l->data;
if (tmp->body_sid == etrack->body_sid
&& tmp->index_sid == etrack->index_sid) {
index_table = tmp;
break;
}
}
if (index_table) {
GstMXFDemuxIndex *index =
&g_array_index (index_table->offsets, GstMXFDemuxIndex,
etrack->position);
if (index->offset != 0) {
keyframe = index->keyframe;
if (keyframe)
GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
else
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
}
}
}
if (!etrack->offsets)
etrack->offsets = g_array_new (FALSE, TRUE, sizeof (GstMXFDemuxIndex));
@ -2495,7 +2525,8 @@ gst_mxf_demux_handle_klv_packet (GstMXFDemux * demux, const MXFUL * key,
} else if (mxf_is_random_index_pack (key)) {
ret = gst_mxf_demux_handle_random_index_pack (demux, key, buffer);
if (ret == GST_FLOW_OK && !demux->index_table_segments_collected) {
if (ret == GST_FLOW_OK && demux->random_access
&& !demux->index_table_segments_collected) {
collect_index_table_segments (demux);
demux->index_table_segments_collected = TRUE;
}