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Code Issues Releases Activity

avformat/movenc: factorize determining mdhd/mvhd/tkhd version

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Also make duration check for mvhd more consistent with the others, write
version 1 of mvhd if duration is at least INT32_MAX instead of UINT32_MAX.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2023-04-15 20:37:44 +02:00
parent 5cdbf817c9
commit 8d8feea0a6
1 changed files with 12 additions and 9 deletions
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21
libavformat/movenc.c
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@ -3269,14 +3269,20 @@ static int64_t calc_pts_duration(MOVMuxContext *mov, MOVTrack *track)
return end - start;
}
static int mov_mdhd_mvhd_tkhd_version(MOVMuxContext *mov, MOVTrack *track, int64_t duration)
{
if (track && track->mode == MODE_ISM)
return 1;
if (duration < INT32_MAX)
return 0;
return 1;
}
static int mov_write_mdhd_tag(AVIOContext *pb, MOVMuxContext *mov,
MOVTrack *track)
{
int64_t duration = calc_samples_pts_duration(mov, track);
int version = duration < INT32_MAX ? 0 : 1;
if (track->mode == MODE_ISM)
version = 1;
int version = mov_mdhd_mvhd_tkhd_version(mov, track, duration);
(version == 1) ? avio_wb32(pb, 44) : avio_wb32(pb, 32); /* size */
ffio_wfourcc(pb, "mdhd");
@ -3362,8 +3368,6 @@ static int mov_write_tkhd_tag(AVIOContext *pb, MOVMuxContext *mov,
else
duration *= mov->avif_loop_count;
version = duration < INT32_MAX ? 0 : 1;
if (st) {
if (mov->per_stream_grouping)
group = st->index;
@ -3379,8 +3383,7 @@ static int mov_write_tkhd_tag(AVIOContext *pb, MOVMuxContext *mov,
if (track->flags & MOV_TRACK_ENABLED)
flags |= MOV_TKHD_FLAG_ENABLED;
if (track->mode == MODE_ISM)
version = 1;
version = mov_mdhd_mvhd_tkhd_version(mov, track, duration);
(version == 1) ? avio_wb32(pb, 104) : avio_wb32(pb, 92); /* size */
ffio_wfourcc(pb, "tkhd");
@ -3863,7 +3866,7 @@ static int mov_write_mvhd_tag(AVIOContext *pb, MOVMuxContext *mov)
max_track_id = 1;
}
version = max_track_len < UINT32_MAX ? 0 : 1;
version = mov_mdhd_mvhd_tkhd_version(mov, NULL, max_track_len);
avio_wb32(pb, version == 1 ? 120 : 108); /* size */
ffio_wfourcc(pb, "mvhd");