Module: libav Branch: master Commit: 00d751d4fc20ec88d2cc2c9f39ec8b9e9c8cdeba
Author: Martin Storsjö <[email protected]> Committer: Martin Storsjö <[email protected]> Date: Fri Mar 6 11:22:35 2015 +0200 movenc: Set tfhd default sample flags based on actual samples, if possible This avoids assuming that e.g. audio samples are marked as sync samples. This allows omitting the sample flags from trun, if the default flags happen to be right for all the samples. Signed-off-by: Martin Storsjö <[email protected]> --- libavformat/movenc.c | 25 +++++++++++++++---------- 1 file changed, 15 insertions(+), 10 deletions(-) diff --git a/libavformat/movenc.c b/libavformat/movenc.c index 343f321..122bc2d 100644 --- a/libavformat/movenc.c +++ b/libavformat/movenc.c @@ -2409,6 +2409,12 @@ static int mov_write_mfhd_tag(AVIOContext *pb, MOVMuxContext *mov) return 0; } +static uint32_t get_sample_flags(MOVTrack *track, MOVIentry *entry) +{ + return entry->flags & MOV_SYNC_SAMPLE ? MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO : + (MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES | MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC); +} + static int mov_write_tfhd_tag(AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track, int64_t moof_offset) { @@ -2454,22 +2460,21 @@ static int mov_write_tfhd_tag(AVIOContext *pb, MOVMuxContext *mov, track->default_size = -1; if (flags & MOV_TFHD_DEFAULT_FLAGS) { - track->default_sample_flags = - track->enc->codec_type == AVMEDIA_TYPE_VIDEO ? - (MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES | MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC) : - MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO; + /* Set the default flags based on the second sample, if available. + * If the first sample is different, that can be signaled via a separate field. */ + if (track->entry > 1) + track->default_sample_flags = get_sample_flags(track, &track->cluster[1]); + else + track->default_sample_flags = + track->enc->codec_type == AVMEDIA_TYPE_VIDEO ? + (MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES | MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC) : + MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO; avio_wb32(pb, track->default_sample_flags); } return update_size(pb, pos); } -static uint32_t get_sample_flags(MOVTrack *track, MOVIentry *entry) -{ - return entry->flags & MOV_SYNC_SAMPLE ? MOV_FRAG_SAMPLE_FLAG_DEPENDS_NO : - (MOV_FRAG_SAMPLE_FLAG_DEPENDS_YES | MOV_FRAG_SAMPLE_FLAG_IS_NON_SYNC); -} - static int mov_write_trun_tag(AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track, int moof_size) { _______________________________________________ libav-commits mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-commits
