Module: libav Branch: master Commit: 50ff0c05b691524d1fd044a2f2eefb706932fc98
Author: Martin Storsjö <[email protected]> Committer: Martin Storsjö <[email protected]> Date: Tue Sep 10 15:24:24 2013 +0300 movenc: Support writing multiple trun atoms This is needed if all the data for one track isn't continuous within the mdat. Normally we make sure all the data for one track is continuous, but in new cases we will need to have the samples interleaved. Signed-off-by: Martin Storsjö <[email protected]> --- libavformat/movenc.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) diff --git a/libavformat/movenc.c b/libavformat/movenc.c index c326999..40de25c 100644 --- a/libavformat/movenc.c +++ b/libavformat/movenc.c @@ -2476,18 +2476,19 @@ static int mov_write_tfhd_tag(AVIOContext *pb, MOVMuxContext *mov, } static int mov_write_trun_tag(AVIOContext *pb, MOVMuxContext *mov, - MOVTrack *track, int moof_size) + MOVTrack *track, int moof_size, + int first, int end) { int64_t pos = avio_tell(pb); uint32_t flags = MOV_TRUN_DATA_OFFSET; int i; - for (i = 0; i < track->entry; i++) { + for (i = first; i < end; i++) { 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; - if (i > 0 && get_sample_flags(track, &track->cluster[i]) != track->default_sample_flags) + if (i > first && get_sample_flags(track, &track->cluster[i]) != track->default_sample_flags) flags |= MOV_TRUN_SAMPLE_FLAGS; } if (!(flags & MOV_TRUN_SAMPLE_FLAGS) && track->entry > 0 && @@ -2501,18 +2502,18 @@ static int mov_write_trun_tag(AVIOContext *pb, MOVMuxContext *mov, avio_w8(pb, 0); /* version */ avio_wb24(pb, flags); - avio_wb32(pb, track->entry); /* sample count */ + avio_wb32(pb, end - first); /* sample count */ if (mov->flags & FF_MOV_FLAG_OMIT_TFHD_OFFSET && !(mov->flags & FF_MOV_FLAG_DEFAULT_BASE_MOOF) && !mov->first_trun) avio_wb32(pb, 0); /* Later tracks follow immediately after the previous one */ else avio_wb32(pb, moof_size + 8 + track->data_offset + - track->cluster[0].pos); /* data offset */ + track->cluster[first].pos); /* data offset */ if (flags & MOV_TRUN_FIRST_SAMPLE_FLAGS) - avio_wb32(pb, get_sample_flags(track, &track->cluster[0])); + avio_wb32(pb, get_sample_flags(track, &track->cluster[first])); - for (i = 0; i < track->entry; i++) { + for (i = first; i < end; i++) { if (flags & MOV_TRUN_SAMPLE_DURATION) avio_wb32(pb, get_cluster_duration(track, i)); if (flags & MOV_TRUN_SAMPLE_SIZE) @@ -2652,13 +2653,20 @@ static int mov_write_traf_tag(AVIOContext *pb, MOVMuxContext *mov, int moof_size) { int64_t pos = avio_tell(pb); + int i, start = 0; avio_wb32(pb, 0); /* size placeholder */ ffio_wfourcc(pb, "traf"); mov_write_tfhd_tag(pb, mov, track, moof_offset); if (mov->mode != MODE_ISM) mov_write_tfdt_tag(pb, track); - mov_write_trun_tag(pb, mov, track, moof_size); + for (i = 1; i < track->entry; i++) { + if (track->cluster[i].pos != track->cluster[i - 1].pos + track->cluster[i - 1].size) { + mov_write_trun_tag(pb, mov, track, moof_size, start, i); + start = i; + } + } + mov_write_trun_tag(pb, mov, track, moof_size, start, track->entry); if (mov->mode == MODE_ISM) { mov_write_tfxd_tag(pb, track); _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
