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libavformat/mov: Fix inserting frames before current_frame.

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When using streaming input, it may be possible to see frames that appear
before the current_frame.  When these frames are inserted into the
index, the current_frame needs to be updated so it is still pointing
at the same frame.

Signed-off-by: Jacob Trimble <modmaker@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Jacob Trimble 2017-07-27 10:34:32 -07:00 committed by Michael Niedermayer
parent 7fb4b0368d
commit f4544163b2
1 changed files with 9 additions and 3 deletions
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12
libavformat/mov.c
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@ -4262,7 +4262,7 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
int64_t dts;
int data_offset = 0;
unsigned entries, first_sample_flags = frag->flags;
int flags, distance, i, err;
int flags, distance, i, err, old_nb_index_entries;
for (i = 0; i < c->fc->nb_streams; i++) {
if (c->fc->streams[i]->id == frag->track_id) {
@ -4355,13 +4355,19 @@ static int mov_read_trun(MOVContext *c, AVIOContext *pb, MOVAtom atom)
MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES));
if (keyframe)
distance = 0;
old_nb_index_entries = st->nb_index_entries;
err = av_add_index_entry(st, offset, dts, sample_size, distance,
keyframe ? AVINDEX_KEYFRAME : 0);
if (err < 0) {
av_log(c->fc, AV_LOG_ERROR, "Failed to add index entry\n");
} else if (err <= sc->current_sample && err + 1 != st->nb_index_entries &&
st->nb_index_entries != old_nb_index_entries) {
// if we inserted a new item before the current sample, move the
// counter ahead so it is still pointing to the same sample.
sc->current_sample++;
}
av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %u, offset %"PRIx64", dts %"PRId64", "
"size %u, distance %d, keyframe %d\n", st->index, sc->sample_count+i,
av_log(c->fc, AV_LOG_TRACE, "AVIndex stream %d, sample %d, offset %"PRIx64", dts %"PRId64", "
"size %u, distance %d, keyframe %d\n", st->index, err,
offset, dts, sample_size, distance, keyframe);
distance++;
dts += sample_duration;