diff options
| author | Vittorio Giovara <vittorio.giovara@gmail.com> | 2017-08-08 16:06:29 +0200 |
|---|---|---|
| committer | Vittorio Giovara <vittorio.giovara@gmail.com> | 2017-08-10 15:32:59 +0200 |
| commit | ebf3b9e8a875eb12312460aee505118791ef805f (patch) | |
| tree | b1c68b5486fbe99749c400196ed10f446a487b46 /libavcodec/h264_sei.c | |
| parent | 19388a7200e5d99c703271f05dba1c806720e808 (diff) | |
| download | ffmpeg-ebf3b9e8a875eb12312460aee505118791ef805f.tar.gz | |
h264: Add support for alternative transfer characterics SEI
The use of this SEI is for backward compatibility in HLG HDR systems:
older devices that cannot interpret the "arib-std-b67" transfer will
get the compatible transfer (usually bt709 or bt2020) from the VUI,
while newer devices that can interpret HDR will read the SEI and use
its value instead.
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
Diffstat (limited to 'libavcodec/h264_sei.c')
| -rw-r--r-- | libavcodec/h264_sei.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/libavcodec/h264_sei.c b/libavcodec/h264_sei.c index 3ca2b7a6cd..03fca9017f 100644 --- a/libavcodec/h264_sei.c +++ b/libavcodec/h264_sei.c @@ -346,6 +346,14 @@ static int decode_display_orientation(H264SEIDisplayOrientation *h, return 0; } +static int decode_alternative_transfer(H264SEIAlternativeTransfer *h, + GetBitContext *gb) +{ + h->present = 1; + h->preferred_transfer_characteristics = get_bits(gb, 8); + return 0; +} + int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, const H264ParamSets *ps, void *logctx) { @@ -396,6 +404,9 @@ int ff_h264_sei_decode(H264SEIContext *h, GetBitContext *gb, case H264_SEI_TYPE_DISPLAY_ORIENTATION: ret = decode_display_orientation(&h->display_orientation, gb); break; + case H264_SEI_TYPE_ALTERNATIVE_TRANSFER: + ret = decode_alternative_transfer(&h->alternative_transfer, gb); + break; default: av_log(logctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type); skip_bits(gb, 8 * size); |