| /* |
| * Copyright (c) 2016 Google Inc. |
| * Copyright (c) 2016 KongQun Yang (kqyang@google.com) |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "libavutil/pixdesc.h" |
| #include "libavutil/pixfmt.h" |
| #include "vpcc.h" |
| |
| enum VPX_CHROMA_SUBSAMPLING |
| { |
| VPX_SUBSAMPLING_420_VERTICAL = 0, |
| VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA = 1, |
| VPX_SUBSAMPLING_422 = 2, |
| VPX_SUBSAMPLING_444 = 3, |
| }; |
| |
| static int get_vpx_chroma_subsampling(AVFormatContext *s, |
| enum AVPixelFormat pixel_format, |
| enum AVChromaLocation chroma_location) |
| { |
| int chroma_w, chroma_h; |
| if (av_pix_fmt_get_chroma_sub_sample(pixel_format, &chroma_w, &chroma_h) == 0) { |
| if (chroma_w == 1 && chroma_h == 1) { |
| return (chroma_location == AVCHROMA_LOC_LEFT) |
| ? VPX_SUBSAMPLING_420_VERTICAL |
| : VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA; |
| } else if (chroma_w == 1 && chroma_h == 0) { |
| return VPX_SUBSAMPLING_422; |
| } else if (chroma_w == 0 && chroma_h == 0) { |
| return VPX_SUBSAMPLING_444; |
| } |
| } |
| av_log(s, AV_LOG_ERROR, "Unsupported pixel format (%d)\n", pixel_format); |
| return -1; |
| } |
| |
| static int get_bit_depth(AVFormatContext *s, enum AVPixelFormat pixel_format) |
| { |
| const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pixel_format); |
| if (desc == NULL) { |
| av_log(s, AV_LOG_ERROR, "Unsupported pixel format (%d)\n", |
| pixel_format); |
| return -1; |
| } |
| return desc->comp[0].depth; |
| } |
| |
| 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 10; |
| } else if (sample_rate <= 2764800 && picture_size <= 73728) { |
| return 11; |
| } else if (sample_rate <= 4608000 && picture_size <= 122880) { |
| return 20; |
| } else if (sample_rate <= 9216000 && picture_size <= 245760) { |
| return 21; |
| } else if (sample_rate <= 20736000 && picture_size <= 552960) { |
| return 30; |
| } else if (sample_rate <= 36864000 && picture_size <= 983040) { |
| return 31; |
| } else if (sample_rate <= 83558400 && picture_size <= 2228224) { |
| return 40; |
| } else if (sample_rate <= 160432128 && picture_size <= 2228224) { |
| return 41; |
| } else if (sample_rate <= 311951360 && picture_size <= 8912896) { |
| return 50; |
| } else if (sample_rate <= 588251136 && picture_size <= 8912896) { |
| return 51; |
| } else if (sample_rate <= 1176502272 && picture_size <= 8912896) { |
| return 52; |
| } else if (sample_rate <= 1176502272 && picture_size <= 35651584) { |
| return 60; |
| } else if (sample_rate <= 2353004544 && picture_size <= 35651584) { |
| return 61; |
| } else if (sample_rate <= 4706009088 && picture_size <= 35651584) { |
| return 62; |
| } else { |
| 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; |
| } |
| |
| int ff_isom_write_vpcc(AVFormatContext *s, AVIOContext *pb, |
| AVCodecParameters *par) |
| { |
| VPCC vpcc; |
| int ret; |
| |
| ret = ff_isom_get_vpcc_features(s, par, NULL, &vpcc); |
| if (ret < 0) |
| return ret; |
| |
| avio_w8(pb, vpcc.profile); |
| avio_w8(pb, vpcc.level); |
| avio_w8(pb, (vpcc.bitdepth << 4) | (vpcc.chroma_subsampling << 1) | vpcc.full_range_flag); |
| avio_w8(pb, par->color_primaries); |
| avio_w8(pb, par->color_trc); |
| avio_w8(pb, par->color_space); |
| |
| // vp9 does not have codec initialization data. |
| avio_wb16(pb, 0); |
| return 0; |
| } |