components/cdm/renderer/android_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/android_key_systems.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/logging.h"
  11 #include "components/cdm/common/cdm_messages_android.h"
  12 #include "components/cdm/renderer/widevine_key_systems.h"
  13 #include "content/public/renderer/render_thread.h"
  14 #include "media/base/eme_constants.h"
  15
  16 #include "widevine_cdm_version.h"  // In SHARED_INTERMEDIATE_DIR.
  17
  18 using media::KeySystemInfo;
  19 using media::SupportedCodecs;
  20
  21 namespace cdm {
  22
  23 static SupportedKeySystemResponse QueryKeySystemSupport(
  24     const std::string& key_system) {
  25   SupportedKeySystemRequest request;
  26   SupportedKeySystemResponse response;
  27
  28   request.key_system = key_system;
  29   request.codecs = media::EME_CODEC_ALL;
  30   content::RenderThread::Get()->Send(
  31       new ChromeViewHostMsg_QueryKeySystemSupport(request, &response));
  32   DCHECK(!(response.compositing_codecs & ~media::EME_CODEC_ALL))
  33       << "unrecognized codec";
  34   DCHECK(!(response.non_compositing_codecs & ~media::EME_CODEC_ALL))
  35       << "unrecognized codec";
  36   return response;
  37 }
  38
  39 void AddAndroidWidevine(std::vector<KeySystemInfo>* concrete_key_systems) {
  40   SupportedKeySystemResponse response = QueryKeySystemSupport(
  41       kWidevineKeySystem);
  42   if (response.compositing_codecs != media::EME_CODEC_NONE) {
  43     AddWidevineWithCodecs(
  44         WIDEVINE,
  45         static_cast<SupportedCodecs>(response.compositing_codecs),
  46         concrete_key_systems);
  47   }
  48
  49   if (response.non_compositing_codecs != media::EME_CODEC_NONE) {
  50     AddWidevineWithCodecs(
  51         WIDEVINE_HR_NON_COMPOSITING,
  52         static_cast<SupportedCodecs>(response.non_compositing_codecs),
  53         concrete_key_systems);
  54   }
  55 }
  56
  57 void AddAndroidPlatformKeySystems(
  58     std::vector<KeySystemInfo>* concrete_key_systems) {
  59   std::vector<std::string> key_system_names;
  60   content::RenderThread::Get()->Send(
  61       new ChromeViewHostMsg_GetPlatformKeySystemNames(&key_system_names));
  62
  63   for (std::vector<std::string>::const_iterator it = key_system_names.begin();
  64        it != key_system_names.end(); ++it) {
  65     SupportedKeySystemResponse response = QueryKeySystemSupport(*it);
  66     if (response.compositing_codecs != media::EME_CODEC_NONE) {
  67       KeySystemInfo info(*it);
  68       info.supported_codecs = response.compositing_codecs;
  69       // Here we assume that support for a container implies support for the
  70       // associated initialization data type. KeySystems handles validating
  71       // |init_data_type| x |container| pairings.
  72       if (response.compositing_codecs & media::EME_CODEC_WEBM_ALL)
  73         info.supported_init_data_types |= media::EME_INIT_DATA_TYPE_WEBM;
  74 #if defined(USE_PROPRIETARY_CODECS)
  75       if (response.compositing_codecs & media::EME_CODEC_MP4_ALL)
  76         info.supported_init_data_types |= media::EME_INIT_DATA_TYPE_CENC;
  77 #endif  // defined(USE_PROPRIETARY_CODECS)
  78       concrete_key_systems->push_back(info);
  79     }
  80   }
  81 }
  82
  83 }  // namespace cdm