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
  10 namespace media {
  11
  12 VideoDecoderConfig::VideoDecoderConfig()
  13     : codec_(kUnknownVideoCodec),
  14       profile_(VIDEO_CODEC_PROFILE_UNKNOWN),
  15       format_(VideoFrame::UNKNOWN),
  16       is_encrypted_(false) {
  17 }
  18
  19 VideoDecoderConfig::VideoDecoderConfig(VideoCodec codec,
  20                                        VideoCodecProfile profile,
  21                                        VideoFrame::Format format,
  22                                        const gfx::Size& coded_size,
  23                                        const gfx::Rect& visible_rect,
  24                                        const gfx::Size& natural_size,
  25                                        const uint8* extra_data,
  26                                        size_t extra_data_size,
  27                                        bool is_encrypted) {
  28   Initialize(codec, profile, format, VideoFrame::COLOR_SPACE_UNSPECIFIED,
  29              coded_size, visible_rect, natural_size, extra_data,
  30              extra_data_size, is_encrypted, true);
  31 }
  32
  33 VideoDecoderConfig::~VideoDecoderConfig() {}
  34
  35 // Some videos just want to watch the world burn, with a height of 0; cap the
  36 // "infinite" aspect ratio resulting.
  37 static const int kInfiniteRatio = 99999;
  38
  39 // Common aspect ratios (multiplied by 100 and truncated) used for histogramming
  40 // video sizes.  These were taken on 20111103 from
  41 // http://wikipedia.org/wiki/Aspect_ratio_(image)#Previous_and_currently_used_aspect_ratios
  42 static const int kCommonAspectRatios100[] = {
  43   100, 115, 133, 137, 143, 150, 155, 160, 166, 175, 177, 185, 200, 210, 220,
  44   221, 235, 237, 240, 255, 259, 266, 276, 293, 400, 1200, kInfiniteRatio,
  45 };
  46
  47 template<class T>  // T has int width() & height() methods.
  48 static void UmaHistogramAspectRatio(const char* name, const T& size) {
  49   UMA_HISTOGRAM_CUSTOM_ENUMERATION(
  50       name,
  51       // Intentionally use integer division to truncate the result.
  52       size.height() ? (size.width() * 100) / size.height() : kInfiniteRatio,
  53       base::CustomHistogram::ArrayToCustomRanges(
  54           kCommonAspectRatios100, arraysize(kCommonAspectRatios100)));
  55 }
  56
  57 void VideoDecoderConfig::Initialize(VideoCodec codec,
  58                                     VideoCodecProfile profile,
  59                                     VideoFrame::Format format,
  60                                     VideoFrame::ColorSpace color_space,
  61                                     const gfx::Size& coded_size,
  62                                     const gfx::Rect& visible_rect,
  63                                     const gfx::Size& natural_size,
  64                                     const uint8* extra_data,
  65                                     size_t extra_data_size,
  66                                     bool is_encrypted,
  67                                     bool record_stats) {
  68   CHECK((extra_data_size != 0) == (extra_data != NULL));
  69
  70   if (record_stats) {
  71     UMA_HISTOGRAM_ENUMERATION("Media.VideoCodec", codec, kVideoCodecMax + 1);
  72     // Drop UNKNOWN because U_H_E() uses one bucket for all values less than 1.
  73     if (profile >= 0) {
  74       UMA_HISTOGRAM_ENUMERATION("Media.VideoCodecProfile", profile,
  75                                 VIDEO_CODEC_PROFILE_MAX + 1);
  76     }
  77     UMA_HISTOGRAM_COUNTS_10000("Media.VideoCodedWidth", coded_size.width());
  78     UmaHistogramAspectRatio("Media.VideoCodedAspectRatio", coded_size);
  79     UMA_HISTOGRAM_COUNTS_10000("Media.VideoVisibleWidth", visible_rect.width());
  80     UmaHistogramAspectRatio("Media.VideoVisibleAspectRatio", visible_rect);
  81     UMA_HISTOGRAM_ENUMERATION("Media.VideoFormat", format,
  82                               VideoFrame::FORMAT_MAX + 1);
  83     UMA_HISTOGRAM_ENUMERATION("Media.VideoFrameColorSpace", color_space,
  84                               VideoFrame::COLOR_SPACE_MAX + 1);
  85   }
  86
  87   codec_ = codec;
  88   profile_ = profile;
  89   format_ = format;
  90   coded_size_ = coded_size;
  91   visible_rect_ = visible_rect;
  92   natural_size_ = natural_size;
  93   extra_data_.assign(extra_data, extra_data + extra_data_size);
  94   is_encrypted_ = is_encrypted;
  95 }
  96
  97 bool VideoDecoderConfig::IsValidConfig() const {
  98   return codec_ != kUnknownVideoCodec &&
  99       natural_size_.width() > 0 &&
 100       natural_size_.height() > 0 &&
 101       VideoFrame::IsValidConfig(format_, coded_size_, visible_rect_,
 102           natural_size_);
 103 }
 104
 105 bool VideoDecoderConfig::Matches(const VideoDecoderConfig& config) const {
 106   return ((codec() == config.codec()) &&
 107           (format() == config.format()) &&
 108           (profile() == config.profile()) &&
 109           (coded_size() == config.coded_size()) &&
 110           (visible_rect() == config.visible_rect()) &&
 111           (natural_size() == config.natural_size()) &&
 112           (extra_data_size() == config.extra_data_size()) &&
 113           (!extra_data() || !memcmp(extra_data(), config.extra_data(),
 114                                     extra_data_size())) &&
 115           (is_encrypted() == config.is_encrypted()));
 116 }
 117
 118 std::string VideoDecoderConfig::AsHumanReadableString() const {
 119   std::ostringstream s;
 120   s << "codec: " << GetHumanReadableCodecName()
 121     << " format: " << format()
 122     << " profile: " << profile()
 123     << " coded size: [" << coded_size().width()
 124     << "," << coded_size().height() << "]"
 125     << " visible rect: [" << visible_rect().x()
 126     << "," << visible_rect().y()
 127     << "," << visible_rect().width()
 128     << "," << visible_rect().height() << "]"
 129     << " natural size: [" << natural_size().width()
 130     << "," << natural_size().height() << "]"
 131     << " has extra data? " << (extra_data() ? "true" : "false")
 132     << " encrypted? " << (is_encrypted() ? "true" : "false");
 133   return s.str();
 134 }
 135
 136 // The names come from src/third_party/ffmpeg/libavcodec/codec_desc.c
 137 std::string VideoDecoderConfig::GetHumanReadableCodecName() const {
 138   switch (codec()) {
 139     case kUnknownVideoCodec:
 140       return "unknown";
 141     case kCodecH264:
 142       return "h264";
 143     case kCodecVC1:
 144       return "vc1";
 145     case kCodecMPEG2:
 146       return "mpeg2video";
 147     case kCodecMPEG4:
 148       return "mpeg4";
 149     case kCodecTheora:
 150       return "theora";
 151     case kCodecVP8:
 152       return "vp8";
 153     case kCodecVP9:
 154       return "vp9";
 155   }
 156   NOTREACHED();
 157   return "";
 158 }
 159
 160 VideoCodec VideoDecoderConfig::codec() const {
 161   return codec_;
 162 }
 163
 164 VideoCodecProfile VideoDecoderConfig::profile() const {
 165   return profile_;
 166 }
 167
 168 VideoFrame::Format VideoDecoderConfig::format() const {
 169   return format_;
 170 }
 171
 172 gfx::Size VideoDecoderConfig::coded_size() const {
 173   return coded_size_;
 174 }
 175
 176 gfx::Rect VideoDecoderConfig::visible_rect() const {
 177   return visible_rect_;
 178 }
 179
 180 gfx::Size VideoDecoderConfig::natural_size() const {
 181   return natural_size_;
 182 }
 183
 184 const uint8* VideoDecoderConfig::extra_data() const {
 185   if (extra_data_.empty())
 186     return NULL;
 187   return &extra_data_[0];
 188 }
 189
 190 size_t VideoDecoderConfig::extra_data_size() const {
 191   return extra_data_.size();
 192 }
 193
 194 bool VideoDecoderConfig::is_encrypted() const {
 195   return is_encrypted_;
 196 }
 197
 198 }  // namespace media