media/base/video_decoder_config.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "media/base/video_decoder_config.h"
   6
   7 #include "base/logging.h"
   8 #include "base/metrics/histogram.h"
   9 #include "media/base/video_frame.h"
  10
  11 namespace media {
  12
  13 VideoCodec VideoCodecProfileToVideoCodec(VideoCodecProfile profile) {
  14   switch (profile) {
  15     case VIDEO_CODEC_PROFILE_UNKNOWN:
  16       return kUnknownVideoCodec;
  17     case H264PROFILE_BASELINE:
  18     case H264PROFILE_MAIN:
  19     case H264PROFILE_EXTENDED:
  20     case H264PROFILE_HIGH:
  21     case H264PROFILE_HIGH10PROFILE:
  22     case H264PROFILE_HIGH422PROFILE:
  23     case H264PROFILE_HIGH444PREDICTIVEPROFILE:
  24     case H264PROFILE_SCALABLEBASELINE:
  25     case H264PROFILE_SCALABLEHIGH:
  26     case H264PROFILE_STEREOHIGH:
  27     case H264PROFILE_MULTIVIEWHIGH:
  28       return kCodecH264;
  29     case VP8PROFILE_ANY:
  30       return kCodecVP8;
  31     case VP9PROFILE_ANY:
  32       return kCodecVP9;
  33   }
  34   NOTREACHED();
  35   return kUnknownVideoCodec;
  36 }
  37
  38
  39 VideoDecoderConfig::VideoDecoderConfig()
  40     : codec_(kUnknownVideoCodec),
  41       profile_(VIDEO_CODEC_PROFILE_UNKNOWN),
  42       format_(PIXEL_FORMAT_UNKNOWN),
  43       is_encrypted_(false) {
  44 }
  45
  46 VideoDecoderConfig::VideoDecoderConfig(VideoCodec codec,
  47                                        VideoCodecProfile profile,
  48                                        VideoPixelFormat format,
  49                                        ColorSpace color_space,
  50                                        const gfx::Size& coded_size,
  51                                        const gfx::Rect& visible_rect,
  52                                        const gfx::Size& natural_size,
  53                                        const uint8* extra_data,
  54                                        size_t extra_data_size,
  55                                        bool is_encrypted) {
  56   Initialize(codec, profile, format, color_space, coded_size, visible_rect,
  57              natural_size, extra_data, extra_data_size, is_encrypted, true);
  58 }
  59
  60 VideoDecoderConfig::~VideoDecoderConfig() {}
  61
  62 // Some videos just want to watch the world burn, with a height of 0; cap the
  63 // "infinite" aspect ratio resulting.
  64 static const int kInfiniteRatio = 99999;
  65
  66 // Common aspect ratios (multiplied by 100 and truncated) used for histogramming
  67 // video sizes.  These were taken on 20111103 from
  68 // http://wikipedia.org/wiki/Aspect_ratio_(image)#Previous_and_currently_used_aspect_ratios
  69 static const int kCommonAspectRatios100[] = {
  70   100, 115, 133, 137, 143, 150, 155, 160, 166, 175, 177, 185, 200, 210, 220,
  71   221, 235, 237, 240, 255, 259, 266, 276, 293, 400, 1200, kInfiniteRatio,
  72 };
  73
  74 template<class T>  // T has int width() & height() methods.
  75 static void UmaHistogramAspectRatio(const char* name, const T& size) {
  76   UMA_HISTOGRAM_CUSTOM_ENUMERATION(
  77       name,
  78       // Intentionally use integer division to truncate the result.
  79       size.height() ? (size.width() * 100) / size.height() : kInfiniteRatio,
  80       base::CustomHistogram::ArrayToCustomRanges(
  81           kCommonAspectRatios100, arraysize(kCommonAspectRatios100)));
  82 }
  83
  84 void VideoDecoderConfig::Initialize(VideoCodec codec,
  85                                     VideoCodecProfile profile,
  86                                     VideoPixelFormat format,
  87                                     ColorSpace color_space,
  88                                     const gfx::Size& coded_size,
  89                                     const gfx::Rect& visible_rect,
  90                                     const gfx::Size& natural_size,
  91                                     const uint8* extra_data,
  92                                     size_t extra_data_size,
  93                                     bool is_encrypted,
  94                                     bool record_stats) {
  95   CHECK((extra_data_size != 0) == (extra_data != NULL));
  96
  97   if (record_stats) {
  98     UMA_HISTOGRAM_ENUMERATION("Media.VideoCodec", codec, kVideoCodecMax + 1);
  99     // Drop UNKNOWN because U_H_E() uses one bucket for all values less than 1.
 100     if (profile >= 0) {
 101       UMA_HISTOGRAM_ENUMERATION("Media.VideoCodecProfile", profile,
 102                                 VIDEO_CODEC_PROFILE_MAX + 1);
 103     }
 104     UMA_HISTOGRAM_COUNTS_10000("Media.VideoCodedWidth", coded_size.width());
 105     UmaHistogramAspectRatio("Media.VideoCodedAspectRatio", coded_size);
 106     UMA_HISTOGRAM_COUNTS_10000("Media.VideoVisibleWidth", visible_rect.width());
 107     UmaHistogramAspectRatio("Media.VideoVisibleAspectRatio", visible_rect);
 108     UMA_HISTOGRAM_ENUMERATION("Media.VideoFramePixelFormat", format,
 109                               PIXEL_FORMAT_MAX + 1);
 110     UMA_HISTOGRAM_ENUMERATION("Media.VideoFrameColorSpace", color_space,
 111                               COLOR_SPACE_MAX + 1);
 112   }
 113
 114   codec_ = codec;
 115   profile_ = profile;
 116   format_ = format;
 117   color_space_ = color_space;
 118   coded_size_ = coded_size;
 119   visible_rect_ = visible_rect;
 120   natural_size_ = natural_size;
 121   extra_data_.assign(extra_data, extra_data + extra_data_size);
 122   is_encrypted_ = is_encrypted;
 123 }
 124
 125 bool VideoDecoderConfig::IsValidConfig() const {
 126   return codec_ != kUnknownVideoCodec &&
 127       natural_size_.width() > 0 &&
 128       natural_size_.height() > 0 &&
 129       VideoFrame::IsValidConfig(format_, VideoFrame::STORAGE_UNOWNED_MEMORY,
 130                                 coded_size_, visible_rect_, natural_size_);
 131 }
 132
 133 bool VideoDecoderConfig::Matches(const VideoDecoderConfig& config) const {
 134   return ((codec() == config.codec()) &&
 135           (format() == config.format()) &&
 136           (profile() == config.profile()) &&
 137           (coded_size() == config.coded_size()) &&
 138           (visible_rect() == config.visible_rect()) &&
 139           (natural_size() == config.natural_size()) &&
 140           (extra_data_size() == config.extra_data_size()) &&
 141           (!extra_data() || !memcmp(extra_data(), config.extra_data(),
 142                                     extra_data_size())) &&
 143           (is_encrypted() == config.is_encrypted()));
 144 }
 145
 146 std::string VideoDecoderConfig::AsHumanReadableString() const {
 147   std::ostringstream s;
 148   s << "codec: " << GetHumanReadableCodecName()
 149     << " format: " << format()
 150     << " profile: " << profile()
 151     << " coded size: [" << coded_size().width()
 152     << "," << coded_size().height() << "]"
 153     << " visible rect: [" << visible_rect().x()
 154     << "," << visible_rect().y()
 155     << "," << visible_rect().width()
 156     << "," << visible_rect().height() << "]"
 157     << " natural size: [" << natural_size().width()
 158     << "," << natural_size().height() << "]"
 159     << " has extra data? " << (extra_data() ? "true" : "false")
 160     << " encrypted? " << (is_encrypted() ? "true" : "false");
 161   return s.str();
 162 }
 163
 164 // The names come from src/third_party/ffmpeg/libavcodec/codec_desc.c
 165 std::string VideoDecoderConfig::GetHumanReadableCodecName() const {
 166   switch (codec()) {
 167     case kUnknownVideoCodec:
 168       return "unknown";
 169     case kCodecH264:
 170       return "h264";
 171     case kCodecVC1:
 172       return "vc1";
 173     case kCodecMPEG2:
 174       return "mpeg2video";
 175     case kCodecMPEG4:
 176       return "mpeg4";
 177     case kCodecTheora:
 178       return "theora";
 179     case kCodecVP8:
 180       return "vp8";
 181     case kCodecVP9:
 182       return "vp9";
 183   }
 184   NOTREACHED();
 185   return "";
 186 }
 187
 188 const uint8* VideoDecoderConfig::extra_data() const {
 189   if (extra_data_.empty())
 190     return NULL;
 191   return &extra_data_[0];
 192 }
 193
 194 }  // namespace media