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      1 // Copyright 2014 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/formats/webm/webm_video_client.h"
      6 
      7 #include "media/base/video_decoder_config.h"
      8 #include "media/formats/webm/webm_constants.h"
      9 
     10 namespace media {
     11 
     12 WebMVideoClient::WebMVideoClient(const LogCB& log_cb)
     13     : log_cb_(log_cb) {
     14   Reset();
     15 }
     16 
     17 WebMVideoClient::~WebMVideoClient() {
     18 }
     19 
     20 void WebMVideoClient::Reset() {
     21   pixel_width_ = -1;
     22   pixel_height_ = -1;
     23   crop_bottom_ = -1;
     24   crop_top_ = -1;
     25   crop_left_ = -1;
     26   crop_right_ = -1;
     27   display_width_ = -1;
     28   display_height_ = -1;
     29   display_unit_ = -1;
     30   alpha_mode_ = -1;
     31 }
     32 
     33 bool WebMVideoClient::InitializeConfig(
     34     const std::string& codec_id, const std::vector<uint8>& codec_private,
     35     bool is_encrypted, VideoDecoderConfig* config) {
     36   DCHECK(config);
     37 
     38   VideoCodec video_codec = kUnknownVideoCodec;
     39   VideoCodecProfile profile = VIDEO_CODEC_PROFILE_UNKNOWN;
     40   if (codec_id == "V_VP8") {
     41     video_codec = kCodecVP8;
     42     profile = VP8PROFILE_MAIN;
     43   } else if (codec_id == "V_VP9") {
     44     video_codec = kCodecVP9;
     45     profile = VP9PROFILE_MAIN;
     46   } else {
     47     MEDIA_LOG(log_cb_) << "Unsupported video codec_id " << codec_id;
     48     return false;
     49   }
     50 
     51   VideoFrame::Format format =
     52       (alpha_mode_ == 1) ? VideoFrame::YV12A : VideoFrame::YV12;
     53 
     54   if (pixel_width_ <= 0 || pixel_height_ <= 0)
     55     return false;
     56 
     57   // Set crop and display unit defaults if these elements are not present.
     58   if (crop_bottom_ == -1)
     59     crop_bottom_ = 0;
     60 
     61   if (crop_top_ == -1)
     62     crop_top_ = 0;
     63 
     64   if (crop_left_ == -1)
     65     crop_left_ = 0;
     66 
     67   if (crop_right_ == -1)
     68     crop_right_ = 0;
     69 
     70   if (display_unit_ == -1)
     71     display_unit_ = 0;
     72 
     73   gfx::Size coded_size(pixel_width_, pixel_height_);
     74   gfx::Rect visible_rect(crop_top_, crop_left_,
     75                          pixel_width_ - (crop_left_ + crop_right_),
     76                          pixel_height_ - (crop_top_ + crop_bottom_));
     77   if (display_unit_ == 0) {
     78     if (display_width_ <= 0)
     79       display_width_ = visible_rect.width();
     80     if (display_height_ <= 0)
     81       display_height_ = visible_rect.height();
     82   } else if (display_unit_ == 3) {
     83     if (display_width_ <= 0 || display_height_ <= 0)
     84       return false;
     85   } else {
     86     MEDIA_LOG(log_cb_) << "Unsupported display unit type " << display_unit_;
     87     return false;
     88   }
     89   gfx::Size natural_size = gfx::Size(display_width_, display_height_);
     90   const uint8* extra_data = NULL;
     91   size_t extra_data_size = 0;
     92   if (codec_private.size() > 0) {
     93     extra_data = &codec_private[0];
     94     extra_data_size = codec_private.size();
     95   }
     96 
     97   config->Initialize(
     98       video_codec, profile, format, coded_size, visible_rect, natural_size,
     99       extra_data, extra_data_size, is_encrypted, true);
    100   return config->IsValidConfig();
    101 }
    102 
    103 bool WebMVideoClient::OnUInt(int id, int64 val) {
    104   int64* dst = NULL;
    105 
    106   switch (id) {
    107     case kWebMIdPixelWidth:
    108       dst = &pixel_width_;
    109       break;
    110     case kWebMIdPixelHeight:
    111       dst = &pixel_height_;
    112       break;
    113     case kWebMIdPixelCropTop:
    114       dst = &crop_top_;
    115       break;
    116     case kWebMIdPixelCropBottom:
    117       dst = &crop_bottom_;
    118       break;
    119     case kWebMIdPixelCropLeft:
    120       dst = &crop_left_;
    121       break;
    122     case kWebMIdPixelCropRight:
    123       dst = &crop_right_;
    124       break;
    125     case kWebMIdDisplayWidth:
    126       dst = &display_width_;
    127       break;
    128     case kWebMIdDisplayHeight:
    129       dst = &display_height_;
    130       break;
    131     case kWebMIdDisplayUnit:
    132       dst = &display_unit_;
    133       break;
    134     case kWebMIdAlphaMode:
    135       dst = &alpha_mode_;
    136       break;
    137     default:
    138       return true;
    139   }
    140 
    141   if (*dst != -1) {
    142     MEDIA_LOG(log_cb_) << "Multiple values for id " << std::hex << id
    143                        << " specified (" << *dst << " and " << val << ")";
    144     return false;
    145   }
    146 
    147   *dst = val;
    148   return true;
    149 }
    150 
    151 bool WebMVideoClient::OnBinary(int id, const uint8* data, int size) {
    152   // Accept binary fields we don't care about for now.
    153   return true;
    154 }
    155 
    156 bool WebMVideoClient::OnFloat(int id, double val) {
    157   // Accept float fields we don't care about for now.
    158   return true;
    159 }
    160 
    161 }  // namespace media
    162