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 "content/renderer/media/crypto/key_systems_info.h" 6 #include "third_party/WebKit/public/platform/WebString.h" 7 8 #include "widevine_cdm_version.h" // In SHARED_INTERMEDIATE_DIR. 9 10 // The following must be after widevine_cdm_version.h. 11 12 #if defined(WIDEVINE_CDM_AVAILABLE) && \ 13 defined(OS_LINUX) && !defined(OS_CHROMEOS) 14 #include <gnu/libc-version.h> 15 #include "base/logging.h" 16 #include "base/version.h" 17 #endif 18 19 #if defined(DISABLE_WIDEVINE_CDM_CANPLAYTYPE) 20 #include "base/command_line.h" 21 #include "media/base/media_switches.h" 22 #endif 23 24 namespace content { 25 26 static const char kClearKeyKeySystem[] = "webkit-org.w3.clearkey"; 27 28 static const char kExternalClearKeyKeySystem[] = 29 "org.chromium.externalclearkey"; 30 31 #if defined(WIDEVINE_CDM_AVAILABLE) 32 // TODO(ddorwin): Automatically support parent systems: http://crbug.com/164303. 33 static const char kWidevineBaseKeySystem[] = "com.widevine"; 34 35 #if defined(WIDEVINE_CDM_CENC_SUPPORT_AVAILABLE) 36 // The supported codecs depend on what the CDM provides. 37 static const char kWidevineVideoMp4Codecs[] = 38 #if defined(WIDEVINE_CDM_AVC1_SUPPORT_AVAILABLE) && \ 39 defined(WIDEVINE_CDM_AAC_SUPPORT_AVAILABLE) 40 "avc1,mp4a"; 41 #elif defined(WIDEVINE_CDM_AVC1_SUPPORT_AVAILABLE) 42 "avc1"; 43 #else 44 ""; // No codec strings are supported. 45 #endif 46 47 static const char kWidevineAudioMp4Codecs[] = 48 #if defined(WIDEVINE_CDM_AAC_SUPPORT_AVAILABLE) 49 "mp4a"; 50 #else 51 ""; // No codec strings are supported. 52 #endif 53 #endif // defined(WIDEVINE_CDM_CENC_SUPPORT_AVAILABLE) 54 55 static inline bool IsWidevine(const std::string& key_system) { 56 return key_system == kWidevineKeySystem || 57 key_system == kWidevineBaseKeySystem; 58 } 59 #endif // defined(WIDEVINE_CDM_AVAILABLE) 60 61 const MediaFormatAndKeySystem kSupportedFormatKeySystemCombinations[] = { 62 // Clear Key. 63 { "video/webm", "vorbis,vp8,vp8.0", kClearKeyKeySystem }, 64 { "audio/webm", "vorbis", kClearKeyKeySystem }, 65 #if defined(GOOGLE_CHROME_BUILD) || defined(USE_PROPRIETARY_CODECS) 66 { "video/mp4", "avc1,mp4a", kClearKeyKeySystem }, 67 { "audio/mp4", "mp4a", kClearKeyKeySystem }, 68 #endif 69 70 // External Clear Key (used for testing). 71 { "video/webm", "vorbis,vp8,vp8.0", kExternalClearKeyKeySystem }, 72 { "audio/webm", "vorbis", kExternalClearKeyKeySystem }, 73 #if defined(GOOGLE_CHROME_BUILD) || defined(USE_PROPRIETARY_CODECS) 74 { "video/mp4", "avc1,mp4a", kExternalClearKeyKeySystem }, 75 { "audio/mp4", "mp4a", kExternalClearKeyKeySystem }, 76 #endif 77 78 #if defined(WIDEVINE_CDM_AVAILABLE) 79 // Widevine. 80 { "video/webm", "vorbis,vp8,vp8.0", kWidevineKeySystem }, 81 { "audio/webm", "vorbis", kWidevineKeySystem }, 82 { "video/webm", "vorbis,vp8,vp8.0", kWidevineBaseKeySystem }, 83 { "audio/webm", "vorbis", kWidevineBaseKeySystem }, 84 #if defined(GOOGLE_CHROME_BUILD) || defined(USE_PROPRIETARY_CODECS) 85 #if defined(WIDEVINE_CDM_CENC_SUPPORT_AVAILABLE) 86 { "video/mp4", kWidevineVideoMp4Codecs, kWidevineKeySystem }, 87 { "video/mp4", kWidevineVideoMp4Codecs, kWidevineBaseKeySystem }, 88 { "audio/mp4", kWidevineAudioMp4Codecs, kWidevineKeySystem }, 89 { "audio/mp4", kWidevineAudioMp4Codecs, kWidevineBaseKeySystem }, 90 #endif // defined(WIDEVINE_CDM_CENC_SUPPORT_AVAILABLE) 91 #endif // defined(GOOGLE_CHROME_BUILD) || defined(USE_PROPRIETARY_CODECS) 92 #endif // WIDEVINE_CDM_AVAILABLE 93 }; 94 95 const int kNumSupportedFormatKeySystemCombinations = 96 arraysize(kSupportedFormatKeySystemCombinations); 97 98 #if defined(ENABLE_PEPPER_CDMS) 99 const KeySystemPepperTypePair kKeySystemToPepperTypeMapping[] = { 100 { kExternalClearKeyKeySystem, "application/x-ppapi-clearkey-cdm"}, 101 #if defined(WIDEVINE_CDM_AVAILABLE) 102 { kWidevineKeySystem, kWidevineCdmPluginMimeType} 103 #endif // WIDEVINE_CDM_AVAILABLE 104 }; 105 106 const int kNumKeySystemToPepperTypeMapping = 107 arraysize(kKeySystemToPepperTypeMapping); 108 #endif // defined(ENABLE_PEPPER_CDMS) 109 110 #if defined(OS_ANDROID) 111 // TODO(qinmin): add UUIDs for other key systems. 112 const KeySystemUUIDPair kKeySystemToUUIDMapping[] = { 113 #if defined(WIDEVINE_CDM_AVAILABLE) 114 { kWidevineKeySystem, { 0xED, 0xEF, 0x8B, 0xA9, 0x79, 0xD6, 0x4A, 0xCE, 115 0xA3, 0xC8, 0x27, 0xDC, 0xD5, 0x1D, 0x21, 0xED } 116 } 117 #endif // defined(WIDEVINE_CDM_AVAILABLE) 118 }; 119 120 // arraySize() does not work if the array is empty, so use ARRAYSIZE_UNSAFE(). 121 const int kNumKeySystemToUUIDMapping = 122 ARRAYSIZE_UNSAFE(kKeySystemToUUIDMapping); 123 #endif // defined(OS_ANDROID) 124 125 bool IsSystemCompatible(const std::string& key_system) { 126 #if defined(WIDEVINE_CDM_AVAILABLE) && \ 127 defined(OS_LINUX) && !defined(OS_CHROMEOS) 128 if (IsWidevine(key_system)) { 129 Version glibc_version(gnu_get_libc_version()); 130 DCHECK(glibc_version.IsValid()); 131 return !glibc_version.IsOlderThan(WIDEVINE_CDM_MIN_GLIBC_VERSION); 132 } 133 #endif 134 return true; 135 } 136 137 bool IsCanPlayTypeSuppressed(const std::string& key_system) { 138 #if defined(DISABLE_WIDEVINE_CDM_CANPLAYTYPE) 139 // See http://crbug.com/237627. 140 if (IsWidevine(key_system) && 141 !CommandLine::ForCurrentProcess()->HasSwitch( 142 switches::kOverrideEncryptedMediaCanPlayType)) 143 return true; 144 #endif 145 return false; 146 } 147 148 std::string KeySystemNameForUMAInternal(const WebKit::WebString& key_system) { 149 if (key_system == kClearKeyKeySystem) 150 return "ClearKey"; 151 #if defined(WIDEVINE_CDM_AVAILABLE) 152 if (key_system == kWidevineKeySystem) 153 return "Widevine"; 154 #endif // WIDEVINE_CDM_AVAILABLE 155 return "Unknown"; 156 } 157 158 bool CanUseBuiltInAesDecryptor(const std::string& key_system) { 159 return key_system == kClearKeyKeySystem; 160 } 161 162 } // namespace content 163
