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avformat/vpcc: Calculate VP9 level from Luma's Sample rate and Picture size

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This commit is contained in:
Karthick Jeyapal 2018-04-23 11:40:31 +05:30
parent 798ae8794e
commit 5b6cc3a73a
2 changed files with 51 additions and 4 deletions
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53
libavformat/vpcc.c
View File

@ -67,11 +67,58 @@ static int get_vpx_video_full_range_flag(enum AVColorRange color_range)
return color_range == AVCOL_RANGE_JPEG;
}
// Find approximate VP9 level based on the Luma's Sample rate and Picture size.
static int get_vp9_level(AVCodecParameters *par, AVRational *frame_rate) {
int picture_size = par->width * par->height;
int64_t sample_rate;
// All decisions will be based on picture_size, if frame rate is missing/invalid
if (!frame_rate || !frame_rate->den)
sample_rate = 0;
else
sample_rate = ((int64_t)picture_size * frame_rate->num) / frame_rate->den;
if (picture_size <= 0) {
return 0;
} else if (sample_rate <= 829440 && picture_size <= 36864) {
return 0x10;
} else if (sample_rate <= 2764800 && picture_size <= 73728) {
return 0x11;
} else if (sample_rate <= 4608000 && picture_size <= 122880) {
return 0x20;
} else if (sample_rate <= 9216000 && picture_size <= 245760) {
return 0x21;
} else if (sample_rate <= 20736000 && picture_size <= 552960) {
return 0x30;
} else if (sample_rate <= 36864000 && picture_size <= 983040) {
return 0x31;
} else if (sample_rate <= 83558400 && picture_size <= 2228224) {
return 0x40;
} else if (sample_rate <= 160432128 && picture_size <= 2228224) {
return 0x41;
} else if (sample_rate <= 311951360 && picture_size <= 8912896) {
return 0x50;
} else if (sample_rate <= 588251136 && picture_size <= 8912896) {
return 0x51;
} else if (sample_rate <= 1176502272 && picture_size <= 8912896) {
return 0x52;
} else if (sample_rate <= 1176502272 && picture_size <= 35651584) {
return 0x60;
} else if (sample_rate <= 2353004544 && picture_size <= 35651584) {
return 0x61;
} else if (sample_rate <= 4706009088 && picture_size <= 35651584) {
return 0x62;
} else {
return 0;
}
}
int ff_isom_get_vpcc_features(AVFormatContext *s, AVCodecParameters *par,
VPCC *vpcc)
AVRational *frame_rate, VPCC *vpcc)
{
int profile = par->profile;
int level = par->level == FF_LEVEL_UNKNOWN ? 0 : par->level;
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);
@ -105,7 +152,7 @@ int ff_isom_write_vpcc(AVFormatContext *s, AVIOContext *pb,
VPCC vpcc;
int ret;
ret = ff_isom_get_vpcc_features(s, par, &vpcc);
ret = ff_isom_get_vpcc_features(s, par, NULL, &vpcc);
if (ret < 0)
return ret;

2
libavformat/vpcc.h
View File

@ -53,6 +53,6 @@ int ff_isom_write_vpcc(AVFormatContext *s, AVIOContext *pb,
AVCodecParameters *par);
int ff_isom_get_vpcc_features(AVFormatContext *s, AVCodecParameters *par,
VPCC *vpcc);
AVRational *frame_rate, VPCC *vpcc);
#endif /* AVFORMAT_VPCC_H */