components/cdm/renderer/widevine_key_systems.cc

   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 "components/cdm/renderer/widevine_key_systems.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/logging.h"
  11 #include "media/base/eme_constants.h"
  12
  13 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
  14
  15 #if defined(WIDEVINE_CDM_AVAILABLE)
  16
  17 using media::KeySystemInfo;
  18 using media::SupportedCodecs;
  19
  20 namespace cdm {
  21
  22 // Return |name|'s parent key system.
  23 static std::string GetDirectParentName(std::string name) {
  24   size_t last_period = name.find_last_of('.');
  25   DCHECK_GT(last_period, 0u);
  26   return name.substr(0u, last_period);
  27 }
  28
  29 void AddWidevineWithCodecs(WidevineCdmType widevine_cdm_type,
  30                            SupportedCodecs supported_codecs,
  31                            std::vector<KeySystemInfo>* concrete_key_systems) {
  32   KeySystemInfo info(kWidevineKeySystem);
  33
  34   switch (widevine_cdm_type) {
  35     case WIDEVINE:
  36       // For standard Widevine, add parent name.
  37       info.parent_key_system = GetDirectParentName(kWidevineKeySystem);
  38       break;
  39 #if defined(OS_ANDROID)
  40     case WIDEVINE_HR_NON_COMPOSITING:
  41       info.key_system.append(".hrnoncompositing");
  42       break;
  43 #endif  // defined(OS_ANDROID)
  44     default:
  45       NOTREACHED();
  46   }
  47
  48   // TODO(xhwang): A container or an initDataType may be supported even though
  49   // there are no codecs supported in that container. Fix this when we support
  50   // initDataType.
  51   info.supported_codecs = supported_codecs;
  52
  53   // Here we assume that support for a container imples support for the
  54   // associated initialization data type. KeySystems handles validating
  55   // |init_data_type| x |container| pairings.
  56   if (supported_codecs & media::EME_CODEC_WEBM_ALL)
  57     info.supported_init_data_types |= media::EME_INIT_DATA_TYPE_WEBM;
  58 #if defined(USE_PROPRIETARY_CODECS)
  59   if (supported_codecs & media::EME_CODEC_MP4_ALL)
  60     info.supported_init_data_types |= media::EME_INIT_DATA_TYPE_CENC;
  61 #endif  // defined(USE_PROPRIETARY_CODECS)
  62
  63 #if defined(ENABLE_PEPPER_CDMS)
  64   info.pepper_type = kWidevineCdmPluginMimeType;
  65 #endif  // defined(ENABLE_PEPPER_CDMS)
  66
  67   concrete_key_systems->push_back(info);
  68 }
  69
  70 }  // namespace cdm
  71
  72 #endif  // defined(WIDEVINE_CDM_AVAILABLE)