int ff_isom_write_vpcc(AVFormatContext *s, AVIOContext *pb,
AVCodecParameters *par)
{
int profile = par->profile;
int level = par->level == FF_LEVEL_UNKNOWN ? 0 : par->level;
int bit_depth = get_bit_depth(s, par->format);
int vpx_color_space = get_vpx_color_space(s, par->color_space);
int vpx_chroma_subsampling =
get_vpx_chroma_subsampling(s, par->format, par->chroma_location);
int vpx_transfer_function = get_vpx_transfer_function(par->color_trc);
int vpx_video_full_range_flag =
get_vpx_video_full_range_flag(par->color_range);
if (bit_depth < 0 || vpx_color_space < 0 || vpx_chroma_subsampling < 0)
return AVERROR_INVALIDDATA;
if (profile == FF_PROFILE_UNKNOWN) {
if (vpx_chroma_subsampling == VPX_SUBSAMPLING_420_VERTICAL ||
vpx_chroma_subsampling == VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA) {
profile = (bit_depth == 8) ? FF_PROFILE_VP9_0 : FF_PROFILE_VP9_2;
} else {
profile = (bit_depth == 8) ? FF_PROFILE_VP9_1 : FF_PROFILE_VP9_3;
}
}
avio_w8(pb, profile);
avio_w8(pb, level);
avio_w8(pb, (bit_depth << 4) | vpx_color_space);
avio_w8(pb, (vpx_chroma_subsampling << 4) | (vpx_transfer_function << 1) |
vpx_video_full_range_flag);
// vp9 does not have codec initialization data.
avio_wb16(pb, 0);
return 0;
}
int ff_isom_get_vpcc_features(AVFormatContext *s, AVCodecParameters *par,
AVRational *frame_rate, VPCC *vpcc)
{
int profile = par->profile;
int level = par->level == FF_LEVEL_UNKNOWN ?
get_vp9_level(par, frame_rate) : par->level;
int bit_depth = get_bit_depth(s, par->format);
int vpx_chroma_subsampling =
get_vpx_chroma_subsampling(s, par->format, par->chroma_location);
int vpx_video_full_range_flag =
get_vpx_video_full_range_flag(par->color_range);
if (bit_depth < 0 || vpx_chroma_subsampling < 0)
return AVERROR_INVALIDDATA;
if (profile == FF_PROFILE_UNKNOWN) {
if (vpx_chroma_subsampling == VPX_SUBSAMPLING_420_VERTICAL ||
vpx_chroma_subsampling == VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA) {
profile = (bit_depth == 8) ? FF_PROFILE_VP9_0 : FF_PROFILE_VP9_2;
} else {
profile = (bit_depth == 8) ? FF_PROFILE_VP9_1 : FF_PROFILE_VP9_3;
}
}
vpcc->profile = profile;
vpcc->level = level;
vpcc->bitdepth = bit_depth;
vpcc->chroma_subsampling = vpx_chroma_subsampling;
vpcc->full_range_flag = vpx_video_full_range_flag;
return 0;
}
