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| author | Vittorio Giovara <vittorio.giovara@gmail.com> | 2017-06-09 17:35:22 -0400 |
|---|---|---|
| committer | Vittorio Giovara <vittorio.giovara@gmail.com> | 2017-06-28 09:42:24 -0400 |
| commit | 3426832ac3074e081923095f7794064a30642841 (patch) | |
| tree | 74e78188da372f02531c776b62e9645f4fd7b1e5 /libavcodec/hevc_sei.c | |
| parent | 850c6db97d1f78e7607952ab8b854a93a185319e (diff) | |
| download | ffmpeg-3426832ac3074e081923095f7794064a30642841.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 f0ad84f2f4..cd55d50212 100644 --- a/libavcodec/hevc_sei.c +++ b/libavcodec/hevc_sei.c @@ -265,6 +265,13 @@ static int decode_nal_sei_active_parameter_sets(HEVCSEIContext *s, GetBitContext 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, HEVCSEIContext *s, const HEVCParamSets *ps, int type, int size, void *logctx) { @@ -285,6 +292,8 @@ static int decode_nal_sei_prefix(GetBitContext *gb, HEVCSEIContext *s, const HEV return decode_nal_sei_active_parameter_sets(s, gb, logctx); case HEVC_SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35: return decode_nal_sei_user_data_registered_itu_t_t35(s, gb, size); + 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); |