src/chrome/renderer/media/chrome_key_systems.cc

   1 // Copyright 2013 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 "chrome/renderer/media/chrome_key_systems.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/logging.h"
  11 #include "base/strings/string16.h"
  12 #include "base/strings/string_split.h"
  13 #include "base/strings/utf_string_conversions.h"
  14 #include "chrome/common/render_messages.h"
  15 #include "components/cdm/renderer/widevine_key_systems.h"
  16 #include "content/public/renderer/render_thread.h"
  17
  18 #if defined(OS_ANDROID)
  19 #include "components/cdm/renderer/android_key_systems.h"
  20 #endif
  21
  22 #include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR.
  23
  24 // The following must be after widevine_cdm_version.h.
  25
  26 #if defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
  27 #include <gnu/libc-version.h>
  28 #include "base/version.h"
  29 #endif
  30
  31 using content::KeySystemInfo;
  32 using content::SupportedCodecs;
  33
  34 #if defined(ENABLE_PEPPER_CDMS)
  35 static bool IsPepperCdmRegistered(
  36     const std::string& pepper_type,
  37     std::vector<base::string16>* additional_param_names,
  38     std::vector<base::string16>* additional_param_values) {
  39   bool is_registered = false;
  40   content::RenderThread::Get()->Send(
  41       new ChromeViewHostMsg_IsInternalPluginRegisteredForMimeType(
  42           pepper_type,
  43           &is_registered,
  44           additional_param_names,
  45           additional_param_values));
  46
  47   return is_registered;
  48 }
  49
  50 // External Clear Key (used for testing).
  51 static void AddExternalClearKey(
  52     std::vector<KeySystemInfo>* concrete_key_systems) {
  53   static const char kExternalClearKeyKeySystem[] =
  54       "org.chromium.externalclearkey";
  55   static const char kExternalClearKeyDecryptOnlyKeySystem[] =
  56       "org.chromium.externalclearkey.decryptonly";
  57   static const char kExternalClearKeyFileIOTestKeySystem[] =
  58       "org.chromium.externalclearkey.fileiotest";
  59   static const char kExternalClearKeyInitializeFailKeySystem[] =
  60       "org.chromium.externalclearkey.initializefail";
  61   static const char kExternalClearKeyCrashKeySystem[] =
  62       "org.chromium.externalclearkey.crash";
  63   static const char kExternalClearKeyPepperType[] =
  64       "application/x-ppapi-clearkey-cdm";
  65
  66   std::vector<base::string16> additional_param_names;
  67   std::vector<base::string16> additional_param_values;
  68   if (!IsPepperCdmRegistered(kExternalClearKeyPepperType,
  69                              &additional_param_names,
  70                              &additional_param_values)) {
  71     return;
  72   }
  73
  74   KeySystemInfo info(kExternalClearKeyKeySystem);
  75
  76   info.supported_codecs = content::EME_CODEC_WEBM_ALL;
  77 #if defined(USE_PROPRIETARY_CODECS)
  78   info.supported_codecs |= content::EME_CODEC_MP4_ALL;
  79 #endif  // defined(USE_PROPRIETARY_CODECS)
  80
  81   info.pepper_type = kExternalClearKeyPepperType;
  82
  83   concrete_key_systems->push_back(info);
  84
  85   // Add support of decrypt-only mode in ClearKeyCdm.
  86   info.key_system = kExternalClearKeyDecryptOnlyKeySystem;
  87   concrete_key_systems->push_back(info);
  88
  89   // A key system that triggers FileIO test in ClearKeyCdm.
  90   info.key_system = kExternalClearKeyFileIOTestKeySystem;
  91   concrete_key_systems->push_back(info);
  92
  93   // A key system that Chrome thinks is supported by ClearKeyCdm, but actually
  94   // will be refused by ClearKeyCdm. This is to test the CDM initialization
  95   // failure case.
  96   info.key_system = kExternalClearKeyInitializeFailKeySystem;
  97   concrete_key_systems->push_back(info);
  98
  99   // A key system that triggers a crash in ClearKeyCdm.
 100   info.key_system = kExternalClearKeyCrashKeySystem;
 101   concrete_key_systems->push_back(info);
 102 }
 103
 104 #if defined(WIDEVINE_CDM_AVAILABLE)
 105 // This function finds "codecs" and parses the value into the vector |codecs|.
 106 // Converts the codec strings to UTF-8 since we only expect ASCII strings and
 107 // this simplifies the rest of the code in this file.
 108 void GetSupportedCodecsForPepperCdm(
 109     const std::vector<base::string16>& additional_param_names,
 110     const std::vector<base::string16>& additional_param_values,
 111     std::vector<std::string>* codecs) {
 112   DCHECK(codecs->empty());
 113   DCHECK_EQ(additional_param_names.size(), additional_param_values.size());
 114   for (size_t i = 0; i < additional_param_names.size(); ++i) {
 115     if (additional_param_names[i] ==
 116         base::ASCIIToUTF16(kCdmSupportedCodecsParamName)) {
 117       const base::string16& codecs_string16 = additional_param_values[i];
 118       std::string codecs_string;
 119       if (!base::UTF16ToUTF8(codecs_string16.c_str(),
 120                              codecs_string16.length(),
 121                              &codecs_string)) {
 122         DLOG(WARNING) << "Non-UTF-8 codecs string.";
 123         // Continue using the best effort conversion.
 124       }
 125       base::SplitString(codecs_string,
 126                         kCdmSupportedCodecsValueDelimiter,
 127                         codecs);
 128       break;
 129     }
 130   }
 131 }
 132
 133 static void AddPepperBasedWidevine(
 134     std::vector<KeySystemInfo>* concrete_key_systems) {
 135 #if defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
 136   Version glibc_version(gnu_get_libc_version());
 137   DCHECK(glibc_version.IsValid());
 138   if (glibc_version.IsOlderThan(WIDEVINE_CDM_MIN_GLIBC_VERSION))
 139     return;
 140 #endif  // defined(WIDEVINE_CDM_MIN_GLIBC_VERSION)
 141
 142   std::vector<base::string16> additional_param_names;
 143   std::vector<base::string16> additional_param_values;
 144   if (!IsPepperCdmRegistered(kWidevineCdmPluginMimeType,
 145                              &additional_param_names,
 146                              &additional_param_values)) {
 147     DVLOG(1) << "Widevine CDM is not currently available.";
 148     return;
 149   }
 150
 151   std::vector<std::string> codecs;
 152   GetSupportedCodecsForPepperCdm(additional_param_names,
 153                                  additional_param_values,
 154                                  &codecs);
 155
 156   SupportedCodecs supported_codecs = content::EME_CODEC_NONE;
 157   for (size_t i = 0; i < codecs.size(); ++i) {
 158     if (codecs[i] == kCdmSupportedCodecVorbis)
 159       supported_codecs |= content::EME_CODEC_WEBM_VORBIS;
 160     if (codecs[i] == kCdmSupportedCodecVp8)
 161       supported_codecs |= content::EME_CODEC_WEBM_VP8;
 162     if (codecs[i] == kCdmSupportedCodecVp9)
 163       supported_codecs |= content::EME_CODEC_WEBM_VP9;
 164 #if defined(USE_PROPRIETARY_CODECS)
 165     if (codecs[i] == kCdmSupportedCodecAac)
 166       supported_codecs |= content::EME_CODEC_MP4_AAC;
 167     if (codecs[i] == kCdmSupportedCodecAvc1)
 168       supported_codecs |= content::EME_CODEC_MP4_AVC1;
 169 #endif  // defined(USE_PROPRIETARY_CODECS)
 170   }
 171
 172   cdm::AddWidevineWithCodecs(cdm::WIDEVINE,
 173                              supported_codecs,
 174                              concrete_key_systems);
 175 }
 176 #endif  // defined(WIDEVINE_CDM_AVAILABLE)
 177 #endif  // defined(ENABLE_PEPPER_CDMS)
 178
 179 void AddChromeKeySystems(std::vector<KeySystemInfo>* key_systems_info) {
 180 #if defined(ENABLE_PEPPER_CDMS)
 181   AddExternalClearKey(key_systems_info);
 182
 183 #if defined(WIDEVINE_CDM_AVAILABLE)
 184   AddPepperBasedWidevine(key_systems_info);
 185 #endif  // defined(WIDEVINE_CDM_AVAILABLE)
 186 #endif  // defined(ENABLE_PEPPER_CDMS)
 187
 188 #if defined(OS_ANDROID)
 189   cdm::AddAndroidWidevine(key_systems_info);
 190 #endif  // defined(OS_ANDROID)
 191 }