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authorKarthick Jeyapal <kjeyapal@akamai.com>2018-04-23 11:40:31 +0530
committerKarthick Jeyapal <kjeyapal@akamai.com>2018-04-26 14:23:08 +0530
commit5b6cc3a73acb90df0d4fe5ca8f51527b64592bf8 (patch)
treeaad9f5da853c19ffdb7c08c5971171c713a9d1b0 /libavformat
parent798ae8794e84b7837cbdc4c9d7943569015ddff4 (diff)
downloadffmpeg-5b6cc3a73acb90df0d4fe5ca8f51527b64592bf8.tar.gz
avformat/vpcc: Calculate VP9 level from Luma's Sample rate and Picture size
Diffstat (limited to 'libavformat')
-rw-r--r--libavformat/vpcc.c53
-rw-r--r--libavformat/vpcc.h2
2 files changed, 51 insertions, 4 deletions
diff --git a/libavformat/vpcc.c b/libavformat/vpcc.c
index 66d0df69e5..79514483af 100644
--- a/libavformat/vpcc.c
+++ b/libavformat/vpcc.c
@@ -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;
diff --git a/libavformat/vpcc.h b/libavformat/vpcc.h
index d71ba05105..e87bec55c2 100644
--- a/libavformat/vpcc.h
+++ b/libavformat/vpcc.h
@@ -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 */