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| author | Vittorio Giovara <vittorio.giovara@gmail.com> | 2017-06-09 17:27:22 -0400 |
|---|---|---|
| committer | Vittorio Giovara <vittorio.giovara@gmail.com> | 2017-06-28 09:44:09 -0400 |
| commit | 969f215957b25ec014aeed6e440ecb450e6927c1 (patch) | |
| tree | 11302d9c13c27716aceb3e1d1542dc813106fcf5 /libavcodec/hevc_sei.c | |
| parent | a594f17f83a1ffdc1eec18818208fe39487dd5d7 (diff) | |
| download | ffmpeg-969f215957b25ec014aeed6e440ecb450e6927c1.tar.gz | |
hevc: 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/hevc_sei.c')
| -rw-r--r-- | libavcodec/hevc_sei.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/libavcodec/hevc_sei.c b/libavcodec/hevc_sei.c index 153d211b4b..0a5d4440bf 100644 --- a/libavcodec/hevc_sei.c +++ b/libavcodec/hevc_sei.c @@ -86,6 +86,13 @@ static int decode_nal_sei_display_orientation(HEVCSEIDisplayOrientation *s, GetB return 0; } +static int decode_nal_sei_alternative_transfer(HEVCSEIAlternativeTransfer *s, GetBitContext *gb) +{ + s->present = 1; + s->preferred_transfer_characteristics = get_bits(gb, 8); + return 0; +} + static int decode_nal_sei_prefix(GetBitContext *gb, void *logctx, HEVCSEI *s, int type, int size) { @@ -96,6 +103,8 @@ static int decode_nal_sei_prefix(GetBitContext *gb, void *logctx, HEVCSEI *s, return decode_nal_sei_frame_packing_arrangement(&s->frame_packing, gb); case HEVC_SEI_TYPE_DISPLAY_ORIENTATION: return decode_nal_sei_display_orientation(&s->display_orientation, gb); + case HEVC_SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS: + return decode_nal_sei_alternative_transfer(&s->alternative_transfer, gb); default: av_log(logctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type); skip_bits_long(gb, 8 * size); |