LCOV - code coverage report
Current view: top level - libavformat - vpcc.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 40 0.0 %
Date: 2017-12-18 06:23:41 Functions: 0 4 0.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2016 Google Inc.
       3             :  * Copyright (c) 2016 KongQun Yang (kqyang@google.com)
       4             :  *
       5             :  * This file is part of FFmpeg.
       6             :  *
       7             :  * FFmpeg is free software; you can redistribute it and/or
       8             :  * modify it under the terms of the GNU Lesser General Public
       9             :  * License as published by the Free Software Foundation; either
      10             :  * version 2.1 of the License, or (at your option) any later version.
      11             :  *
      12             :  * FFmpeg is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      15             :  * Lesser General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU Lesser General Public
      18             :  * License along with FFmpeg; if not, write to the Free Software
      19             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      20             :  */
      21             : 
      22             : #include "libavutil/pixdesc.h"
      23             : #include "libavutil/pixfmt.h"
      24             : #include "vpcc.h"
      25             : 
      26             : enum VPX_CHROMA_SUBSAMPLING
      27             : {
      28             :     VPX_SUBSAMPLING_420_VERTICAL = 0,
      29             :     VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA = 1,
      30             :     VPX_SUBSAMPLING_422 = 2,
      31             :     VPX_SUBSAMPLING_444 = 3,
      32             : };
      33             : 
      34           0 : static int get_vpx_chroma_subsampling(AVFormatContext *s,
      35             :                                       enum AVPixelFormat pixel_format,
      36             :                                       enum AVChromaLocation chroma_location)
      37             : {
      38             :     int chroma_w, chroma_h;
      39           0 :     if (av_pix_fmt_get_chroma_sub_sample(pixel_format, &chroma_w, &chroma_h) == 0) {
      40           0 :         if (chroma_w == 1 && chroma_h == 1) {
      41             :             return (chroma_location == AVCHROMA_LOC_LEFT)
      42             :                        ? VPX_SUBSAMPLING_420_VERTICAL
      43           0 :                        : VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA;
      44           0 :         } else if (chroma_w == 1 && chroma_h == 0) {
      45           0 :             return VPX_SUBSAMPLING_422;
      46           0 :         } else if (chroma_w == 0 && chroma_h == 0) {
      47           0 :             return VPX_SUBSAMPLING_444;
      48             :         }
      49             :     }
      50           0 :     av_log(s, AV_LOG_ERROR, "Unsupported pixel format (%d)\n", pixel_format);
      51           0 :     return -1;
      52             : }
      53             : 
      54           0 : static int get_bit_depth(AVFormatContext *s, enum AVPixelFormat pixel_format)
      55             : {
      56           0 :     const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(pixel_format);
      57           0 :     if (desc == NULL) {
      58           0 :         av_log(s, AV_LOG_ERROR, "Unsupported pixel format (%d)\n",
      59             :                pixel_format);
      60           0 :         return -1;
      61             :     }
      62           0 :     return desc->comp[0].depth;
      63             : }
      64             : 
      65           0 : static int get_vpx_video_full_range_flag(enum AVColorRange color_range)
      66             : {
      67           0 :     return color_range == AVCOL_RANGE_JPEG;
      68             : }
      69             : 
      70           0 : int ff_isom_write_vpcc(AVFormatContext *s, AVIOContext *pb,
      71             :                        AVCodecParameters *par)
      72             : {
      73           0 :     int profile = par->profile;
      74           0 :     int level = par->level == FF_LEVEL_UNKNOWN ? 0 : par->level;
      75           0 :     int bit_depth = get_bit_depth(s, par->format);
      76           0 :     int vpx_chroma_subsampling =
      77           0 :         get_vpx_chroma_subsampling(s, par->format, par->chroma_location);
      78           0 :     int vpx_video_full_range_flag =
      79           0 :         get_vpx_video_full_range_flag(par->color_range);
      80             : 
      81           0 :     if (bit_depth < 0 || vpx_chroma_subsampling < 0)
      82           0 :         return AVERROR_INVALIDDATA;
      83             : 
      84           0 :     if (profile == FF_PROFILE_UNKNOWN) {
      85           0 :         if (vpx_chroma_subsampling == VPX_SUBSAMPLING_420_VERTICAL ||
      86             :             vpx_chroma_subsampling == VPX_SUBSAMPLING_420_COLLOCATED_WITH_LUMA) {
      87           0 :             profile = (bit_depth == 8) ? FF_PROFILE_VP9_0 : FF_PROFILE_VP9_2;
      88             :         } else {
      89           0 :             profile = (bit_depth == 8) ? FF_PROFILE_VP9_1 : FF_PROFILE_VP9_3;
      90             :         }
      91             :     }
      92             : 
      93           0 :     avio_w8(pb, profile);
      94           0 :     avio_w8(pb, level);
      95           0 :     avio_w8(pb, (bit_depth << 4) | (vpx_chroma_subsampling << 1) | vpx_video_full_range_flag);
      96           0 :     avio_w8(pb, par->color_primaries);
      97           0 :     avio_w8(pb, par->color_trc);
      98           0 :     avio_w8(pb, par->color_space);
      99             : 
     100             :     // vp9 does not have codec initialization data.
     101           0 :     avio_wb16(pb, 0);
     102           0 :     return 0;
     103             : }

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