From 50ff0c05b691524d1fd044a2f2eefb706932fc98 Mon Sep 17 00:00:00 2001 From: Martin Storsjö Date: Tue, 10 Sep 2013 15:24:24 +0300 Subject: movenc: Support writing multiple trun atoms MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 --- libavformat/movenc.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) (limited to 'libavformat/movenc.c') diff --git a/libavformat/movenc.c b/libavformat/movenc.c index c326999327..40de25c785 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); -- cgit v1.2.3