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movenc: factorize calculation of cluster duration into a separate function

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This commit is contained in:
Justin Ruggles 2012-02-26 17:17:13 -05:00
parent f5f5b154e7
commit 681d17264f
1 changed files with 18 additions and 11 deletions
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29
libavformat/movenc.c
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@ -551,6 +551,21 @@ static int mov_get_lpcm_flags(enum CodecID codec_id)
}
}
static int get_cluster_duration(MOVTrack *track, int cluster_idx)
{
int64_t next_dts;
if (cluster_idx >= track->entry)
return 0;
if (cluster_idx + 1 == track->entry)
next_dts = track->track_duration + track->start_dts;
else
next_dts = track->cluster[cluster_idx + 1].dts;
return next_dts - track->cluster[cluster_idx].dts;
}
static int mov_write_audio_tag(AVIOContext *pb, MOVTrack *track)
{
int64_t pos = avio_tell(pb);
@ -1107,9 +1122,7 @@ static int mov_write_stts_tag(AVIOContext *pb, MOVTrack *track)
av_malloc(track->entry * sizeof(*stts_entries)) : /* worst case */
NULL;
for (i=0; i<track->entry; i++) {
int64_t duration = i + 1 == track->entry ?
track->track_duration - track->cluster[i].dts + track->start_dts : /* readjusting */
track->cluster[i+1].dts - track->cluster[i].dts;
int duration = get_cluster_duration(track, i);
if (i && duration == stts_entries[entries].duration) {
stts_entries[entries].count++; /* compress */
} else {
@ -2235,10 +2248,7 @@ static int mov_write_trun_tag(AVIOContext *pb, MOVTrack *track)
int i;
for (i = 0; i < track->entry; i++) {
int64_t duration = i + 1 == track->entry ?
track->track_duration - track->cluster[i].dts + track->start_dts :
track->cluster[i + 1].dts - track->cluster[i].dts;
if (duration != track->default_duration)
if (get_cluster_duration(track, i) != track->default_duration)
flags |= MOV_TRUN_SAMPLE_DURATION;
if (track->cluster[i].size != track->default_size)
flags |= MOV_TRUN_SAMPLE_SIZE;
@ -2262,11 +2272,8 @@ static int mov_write_trun_tag(AVIOContext *pb, MOVTrack *track)
avio_wb32(pb, get_sample_flags(track, &track->cluster[0]));
for (i = 0; i < track->entry; i++) {
int64_t duration = i + 1 == track->entry ?
track->track_duration - track->cluster[i].dts + track->start_dts :
track->cluster[i + 1].dts - track->cluster[i].dts;
if (flags & MOV_TRUN_SAMPLE_DURATION)
avio_wb32(pb, duration);
avio_wb32(pb, get_cluster_duration(track, i));
if (flags & MOV_TRUN_SAMPLE_SIZE)
avio_wb32(pb, track->cluster[i].size);
if (flags & MOV_TRUN_SAMPLE_FLAGS)