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avformat/movenc: add write_clli flag to write clli atom 

The clli atom isn't in ISO/IEC 14496-12:2015 so the flag is marked as
experimental and the clli atom is not written by default.

The clli atom is already parsed by FFmpeg in mov.c.

Signed-off-by: Michael Bradshaw <mjbshaw@google.com>
This commit is contained in:
Michael Bradshaw 2020-03-27 17:19:02 -06:00
parent 00ce1ec6a5
commit 5a0575e32c
2 changed files with 27 additions and 0 deletions
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26
libavformat/movenc.c
View File

@ -77,6 +77,7 @@ static const AVOption options[] = {
{ "delay_moov", "Delay writing the initial moov until the first fragment is cut, or until the first fragment flush", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DELAY_MOOV}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
{ "global_sidx", "Write a global sidx index at the start of the file", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_GLOBAL_SIDX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
{ "skip_sidx", "Skip writing of sidx atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SKIP_SIDX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
{ "write_clli", "Write clli atom (Experimental, may be renamed or changed, do not use from scripts)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_CLLI}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
{ "write_colr", "Write colr atom (Experimental, may be renamed or changed, do not use from scripts)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_COLR}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
{ "prefer_icc", "If writing colr atom prioritise usage of ICC profile if it exists in stream packet side data", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_PREFER_ICC}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
{ "write_gama", "Write deprecated gama atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_GAMA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
@ -1967,6 +1968,25 @@ static int mov_write_colr_tag(AVIOContext *pb, MOVTrack *track, int prefer_icc)
return update_size(pb, pos);
}
static int mov_write_clli_tag(AVIOContext *pb, MOVTrack *track)
{
const uint8_t *side_data;
const AVContentLightMetadata *content_light_metadata;
side_data = av_stream_get_side_data(track->st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL, NULL);
if (!side_data) {
av_log(NULL, AV_LOG_WARNING, "Not writing 'clli' atom. No content light level info.\n");
return 0;
}
content_light_metadata = (const AVContentLightMetadata*)side_data;
avio_wb32(pb, 12); // size
ffio_wfourcc(pb, "clli");
avio_wb16(pb, content_light_metadata->MaxCLL);
avio_wb16(pb, content_light_metadata->MaxFALL);
return 12;
}
static void find_compressor(char * compressor_name, int len, MOVTrack *track)
{
AVDictionaryEntry *encoder;
@ -2140,6 +2160,12 @@ static int mov_write_video_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContex
else
av_log(mov->fc, AV_LOG_WARNING, "Not writing 'colr' atom. Format is not MOV or MP4.\n");
}
if (mov->flags & FF_MOV_FLAG_WRITE_CLLI) {
if (track->mode == MODE_MOV || track->mode == MODE_MP4)
mov_write_clli_tag(pb, track);
else
av_log(mov->fc, AV_LOG_WARNING, "Not writing 'clli' atom. Format is not MOV or MP4.\n");
}
if (track->mode == MODE_MP4 && mov->fc->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
AVStereo3D* stereo_3d = (AVStereo3D*) av_stream_get_side_data(track->st, AV_PKT_DATA_STEREO3D, NULL);

1
libavformat/movenc.h
View File

@ -261,6 +261,7 @@ typedef struct MOVMuxContext {
#define FF_MOV_FLAG_SKIP_SIDX (1 << 21)
#define FF_MOV_FLAG_CMAF (1 << 22)
#define FF_MOV_FLAG_PREFER_ICC (1 << 23)
#define FF_MOV_FLAG_WRITE_CLLI (1 << 24)
int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt);