| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "cobalt/media/base/key_systems.h" |
| |
| #include <memory> |
| |
| #include "base/basictypes.h" |
| #include "base/hash_tables.h" |
| #include "base/lazy_instance.h" |
| #include "base/logging.h" |
| #include "base/string_util.h" |
| #include "base/threading/thread_checker.h" |
| #include "base/time.h" |
| #include "build/build_config.h" |
| #include "cobalt/media/base/key_system_names.h" |
| #include "cobalt/media/base/key_system_properties.h" |
| #include "cobalt/media/base/media.h" |
| #include "cobalt/media/base/media_client.h" |
| #include "starboard/types.h" |
| #include "third_party/widevine/cdm/widevine_cdm_common.h" |
| |
| namespace cobalt { |
| namespace media { |
| |
| const char kClearKeyKeySystem[] = "org.w3.clearkey"; |
| |
| // These names are used by UMA. Do not change them! |
| const char kClearKeyKeySystemNameForUMA[] = "ClearKey"; |
| const char kUnknownKeySystemNameForUMA[] = "Unknown"; |
| |
| struct NamedCodec { |
| const char* name; |
| EmeCodec type; |
| }; |
| |
| // Mapping between containers and their codecs. |
| // Only audio codecs can belong to a "audio/*" mime_type, and only video codecs |
| // can belong to a "video/*" mime_type. |
| static const NamedCodec kMimeTypeToCodecMasks[] = { |
| {"audio/webm", EME_CODEC_WEBM_AUDIO_ALL}, |
| {"video/webm", EME_CODEC_WEBM_VIDEO_ALL}, |
| #if defined(USE_PROPRIETARY_CODECS) |
| {"audio/mp4", EME_CODEC_MP4_AUDIO_ALL}, |
| {"video/mp4", EME_CODEC_MP4_VIDEO_ALL} |
| #endif // defined(USE_PROPRIETARY_CODECS) |
| }; |
| |
| // Mapping between codec names and enum values. |
| static const NamedCodec kCodecStrings[] = { |
| {"opus", EME_CODEC_WEBM_OPUS}, // Opus. |
| {"vorbis", EME_CODEC_WEBM_VORBIS}, // Vorbis. |
| {"vp8", EME_CODEC_WEBM_VP8}, // VP8. |
| {"vp8.0", EME_CODEC_WEBM_VP8}, // VP8. |
| {"vp9", EME_CODEC_WEBM_VP9}, // VP9. |
| {"vp9.0", EME_CODEC_WEBM_VP9}, // VP9. |
| #if defined(USE_PROPRIETARY_CODECS) |
| {"vp09", EME_CODEC_MP4_VP9}, // VP9 in MP4. |
| {"mp4a", EME_CODEC_MP4_AAC}, // AAC. |
| {"avc1", EME_CODEC_MP4_AVC1}, // AVC1. |
| {"avc3", EME_CODEC_MP4_AVC1}, // AVC3. |
| #if BUILDFLAG(ENABLE_HEVC_DEMUXING) |
| {"hev1", EME_CODEC_MP4_HEVC}, // HEV1. |
| {"hvc1", EME_CODEC_MP4_HEVC}, // HVC1. |
| #endif |
| #endif // defined(USE_PROPRIETARY_CODECS) |
| }; |
| |
| class ClearKeyProperties : public KeySystemProperties { |
| public: |
| std::string GetKeySystemName() const override { return kClearKeyKeySystem; } |
| |
| bool IsSupportedInitDataType(EmeInitDataType init_data_type) const override { |
| #if defined(USE_PROPRIETARY_CODECS) |
| if (init_data_type == EmeInitDataType::CENC) return true; |
| #endif |
| return init_data_type == EmeInitDataType::WEBM || |
| init_data_type == EmeInitDataType::KEYIDS; |
| } |
| |
| SupportedCodecs GetSupportedCodecs() const override { |
| // On Android, Vorbis, VP8, AAC and AVC1 are supported in MediaCodec: |
| // http://developer.android.com/guide/appendix/media-formats.html |
| // VP9 support is device dependent. |
| SupportedCodecs codecs = EME_CODEC_WEBM_ALL; |
| |
| #if defined(USE_PROPRIETARY_CODECS) |
| codecs |= EME_CODEC_MP4_ALL; |
| #endif // defined(USE_PROPRIETARY_CODECS) |
| |
| return codecs; |
| } |
| |
| EmeConfigRule GetRobustnessConfigRule( |
| EmeMediaType media_type, |
| const std::string& requested_robustness) const override { |
| return requested_robustness.empty() ? EmeConfigRule::SUPPORTED |
| : EmeConfigRule::NOT_SUPPORTED; |
| } |
| EmeSessionTypeSupport GetPersistentLicenseSessionSupport() const override { |
| return EmeSessionTypeSupport::NOT_SUPPORTED; |
| } |
| EmeSessionTypeSupport GetPersistentReleaseMessageSessionSupport() |
| const override { |
| return EmeSessionTypeSupport::NOT_SUPPORTED; |
| } |
| EmeFeatureSupport GetPersistentStateSupport() const override { |
| return EmeFeatureSupport::NOT_SUPPORTED; |
| } |
| EmeFeatureSupport GetDistinctiveIdentifierSupport() const override { |
| return EmeFeatureSupport::NOT_SUPPORTED; |
| } |
| bool UseAesDecryptor() const override { return true; } |
| }; |
| |
| // Returns whether the |key_system| is known to Chromium and is thus likely to |
| // be implemented in an interoperable way. |
| // True is always returned for a |key_system| that begins with "x-". |
| // |
| // As with other web platform features, advertising support for a key system |
| // implies that it adheres to a defined and interoperable specification. |
| // |
| // To ensure interoperability, implementations of a specific |key_system| string |
| // must conform to a specification for that identifier that defines |
| // key system-specific behaviors not fully defined by the EME specification. |
| // That specification should be provided by the owner of the domain that is the |
| // reverse of the |key_system| string. |
| // This involves more than calling a library, SDK, or platform API. |
| // KeySystemsImpl must be populated appropriately, and there will likely be glue |
| // code to adapt to the API of the library, SDK, or platform API. |
| // |
| // Chromium mainline contains this data and glue code for specific key systems, |
| // which should help ensure interoperability with other implementations using |
| // these key systems. |
| // |
| // If you need to add support for other key systems, ensure that you have |
| // obtained the specification for how to integrate it with EME, implemented the |
| // appropriate glue/adapter code, and added all the appropriate data to |
| // KeySystemsImpl. Only then should you change this function. |
| static bool IsPotentiallySupportedKeySystem(const std::string& key_system) { |
| // Known and supported key systems. |
| if (key_system == kWidevineKeySystem) return true; |
| if (key_system == kClearKeyKeySystem) return true; |
| |
| // External Clear Key is known and supports suffixes for testing. |
| if (IsExternalClearKey(key_system)) return true; |
| |
| // Chromecast defines behaviors for Cast clients within its reverse domain. |
| const char kChromecastRoot[] = "com.chromecast"; |
| if (IsChildKeySystemOf(key_system, kChromecastRoot)) return true; |
| |
| // Implementations that do not have a specification or appropriate glue code |
| // can use the "x-" prefix to avoid conflicting with and advertising support |
| // for real key system names. Use is discouraged. |
| const char kExcludedPrefix[] = "x-"; |
| return base::StartsWith(key_system, kExcludedPrefix, |
| base::CompareCase::SENSITIVE); |
| } |
| |
| class KeySystemsImpl : public KeySystems { |
| public: |
| static KeySystemsImpl* GetInstance(); |
| |
| void UpdateIfNeeded(); |
| |
| std::string GetKeySystemNameForUMA(const std::string& key_system) const; |
| |
| bool UseAesDecryptor(const std::string& key_system) const; |
| |
| #if defined(ENABLE_PEPPER_CDMS) |
| std::string GetPepperType(const std::string& key_system) const; |
| #endif |
| |
| // These two functions are for testing purpose only. |
| void AddCodecMask(EmeMediaType media_type, const std::string& codec, |
| uint32_t mask); |
| void AddMimeTypeCodecMask(const std::string& mime_type, uint32_t mask); |
| |
| // Implementation of KeySystems interface. |
| bool IsSupportedKeySystem(const std::string& key_system) const OVERRIDE; |
| |
| bool IsSupportedInitDataType(const std::string& key_system, |
| EmeInitDataType init_data_type) const OVERRIDE; |
| |
| EmeConfigRule GetContentTypeConfigRule( |
| const std::string& key_system, EmeMediaType media_type, |
| const std::string& container_mime_type, |
| const std::vector<std::string>& codecs) const OVERRIDE; |
| |
| EmeConfigRule GetRobustnessConfigRule( |
| const std::string& key_system, EmeMediaType media_type, |
| const std::string& requested_robustness) const OVERRIDE; |
| |
| EmeSessionTypeSupport GetPersistentLicenseSessionSupport( |
| const std::string& key_system) const OVERRIDE; |
| |
| EmeSessionTypeSupport GetPersistentReleaseMessageSessionSupport( |
| const std::string& key_system) const OVERRIDE; |
| |
| EmeFeatureSupport GetPersistentStateSupport( |
| const std::string& key_system) const OVERRIDE; |
| |
| EmeFeatureSupport GetDistinctiveIdentifierSupport( |
| const std::string& key_system) const OVERRIDE; |
| |
| private: |
| KeySystemsImpl(); |
| ~KeySystemsImpl() OVERRIDE; |
| |
| void InitializeUMAInfo(); |
| |
| void UpdateSupportedKeySystems(); |
| |
| void AddSupportedKeySystems( |
| std::vector<std::unique_ptr<KeySystemProperties>>* key_systems); |
| |
| void RegisterMimeType(const std::string& mime_type, EmeCodec codecs_mask); |
| bool IsValidMimeTypeCodecsCombination(const std::string& mime_type, |
| SupportedCodecs codecs_mask) const; |
| |
| friend struct base::DefaultLazyInstanceTraits<KeySystemsImpl>; |
| |
| typedef base::hash_map<std::string, std::unique_ptr<KeySystemProperties>> |
| KeySystemPropertiesMap; |
| typedef base::hash_map<std::string, SupportedCodecs> MimeTypeCodecsMap; |
| typedef base::hash_map<std::string, EmeCodec> CodecsMap; |
| typedef base::hash_map<std::string, EmeInitDataType> InitDataTypesMap; |
| typedef base::hash_map<std::string, std::string> KeySystemNameForUMAMap; |
| |
| // TODO(sandersd): Separate container enum from codec mask value. |
| // http://crbug.com/417440 |
| // Potentially pass EmeMediaType and a container enum. |
| SupportedCodecs GetCodecMaskForMimeType( |
| const std::string& container_mime_type) const; |
| EmeCodec GetCodecForString(const std::string& codec) const; |
| |
| // Map from key system string to KeySystemProperties instance. |
| KeySystemPropertiesMap key_system_properties_map_; |
| |
| // This member should only be modified by RegisterMimeType(). |
| MimeTypeCodecsMap mime_type_to_codec_mask_map_; |
| CodecsMap codec_string_map_; |
| KeySystemNameForUMAMap key_system_name_for_uma_map_; |
| |
| SupportedCodecs audio_codec_mask_; |
| SupportedCodecs video_codec_mask_; |
| |
| // Makes sure all methods are called from the same thread. |
| base::ThreadChecker thread_checker_; |
| |
| DISALLOW_COPY_AND_ASSIGN(KeySystemsImpl); |
| }; |
| |
| static base::LazyInstance<KeySystemsImpl>::Leaky g_key_systems = |
| LAZY_INSTANCE_INITIALIZER; |
| |
| KeySystemsImpl* KeySystemsImpl::GetInstance() { |
| KeySystemsImpl* key_systems = g_key_systems.Pointer(); |
| key_systems->UpdateIfNeeded(); |
| return key_systems; |
| } |
| |
| // Because we use a LazyInstance, the key systems info must be populated when |
| // the instance is lazily initiated. |
| KeySystemsImpl::KeySystemsImpl() |
| : audio_codec_mask_(EME_CODEC_AUDIO_ALL), |
| video_codec_mask_(EME_CODEC_VIDEO_ALL) { |
| for (size_t i = 0; i < arraysize(kCodecStrings); ++i) { |
| const std::string& name = kCodecStrings[i].name; |
| DCHECK(!codec_string_map_.count(name)); |
| codec_string_map_[name] = kCodecStrings[i].type; |
| } |
| for (size_t i = 0; i < arraysize(kMimeTypeToCodecMasks); ++i) { |
| RegisterMimeType(kMimeTypeToCodecMasks[i].name, |
| kMimeTypeToCodecMasks[i].type); |
| } |
| |
| InitializeUMAInfo(); |
| |
| // Always update supported key systems during construction. |
| UpdateSupportedKeySystems(); |
| } |
| |
| KeySystemsImpl::~KeySystemsImpl() {} |
| |
| SupportedCodecs KeySystemsImpl::GetCodecMaskForMimeType( |
| const std::string& container_mime_type) const { |
| MimeTypeCodecsMap::const_iterator iter = |
| mime_type_to_codec_mask_map_.find(container_mime_type); |
| if (iter == mime_type_to_codec_mask_map_.end()) return EME_CODEC_NONE; |
| |
| DCHECK(IsValidMimeTypeCodecsCombination(container_mime_type, iter->second)); |
| return iter->second; |
| } |
| |
| EmeCodec KeySystemsImpl::GetCodecForString(const std::string& codec) const { |
| CodecsMap::const_iterator iter = codec_string_map_.find(codec); |
| if (iter != codec_string_map_.end()) return iter->second; |
| return EME_CODEC_NONE; |
| } |
| |
| void KeySystemsImpl::InitializeUMAInfo() { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| DCHECK(key_system_name_for_uma_map_.empty()); |
| |
| std::vector<KeySystemInfoForUMA> key_systems_info_for_uma; |
| if (GetMediaClient()) |
| GetMediaClient()->AddKeySystemsInfoForUMA(&key_systems_info_for_uma); |
| |
| for (const KeySystemInfoForUMA& info : key_systems_info_for_uma) { |
| key_system_name_for_uma_map_[info.key_system] = |
| info.key_system_name_for_uma; |
| } |
| |
| // Clear Key is always supported. |
| key_system_name_for_uma_map_[kClearKeyKeySystem] = |
| kClearKeyKeySystemNameForUMA; |
| } |
| |
| void KeySystemsImpl::UpdateIfNeeded() { |
| if (GetMediaClient() && GetMediaClient()->IsKeySystemsUpdateNeeded()) |
| UpdateSupportedKeySystems(); |
| } |
| |
| void KeySystemsImpl::UpdateSupportedKeySystems() { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| key_system_properties_map_.clear(); |
| |
| std::vector<std::unique_ptr<KeySystemProperties>> key_systems_properties; |
| |
| // Add key systems supported by the MediaClient implementation. |
| if (GetMediaClient()) |
| GetMediaClient()->AddSupportedKeySystems(&key_systems_properties); |
| |
| // Clear Key is always supported. |
| key_systems_properties.emplace_back(new ClearKeyProperties()); |
| |
| AddSupportedKeySystems(&key_systems_properties); |
| } |
| |
| void KeySystemsImpl::AddSupportedKeySystems( |
| std::vector<std::unique_ptr<KeySystemProperties>>* key_systems) { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| DCHECK(key_system_properties_map_.empty()); |
| |
| for (auto& properties : *key_systems) { |
| DCHECK(!properties->GetKeySystemName().empty()); |
| DCHECK(properties->GetPersistentLicenseSessionSupport() != |
| EmeSessionTypeSupport::INVALID); |
| DCHECK(properties->GetPersistentReleaseMessageSessionSupport() != |
| EmeSessionTypeSupport::INVALID); |
| DCHECK(properties->GetPersistentStateSupport() != |
| EmeFeatureSupport::INVALID); |
| DCHECK(properties->GetDistinctiveIdentifierSupport() != |
| EmeFeatureSupport::INVALID); |
| |
| if (!IsPotentiallySupportedKeySystem(properties->GetKeySystemName())) { |
| // If you encounter this path, see the comments for the function above. |
| DLOG(ERROR) << "Unsupported name '" << properties->GetKeySystemName() |
| << "'. See code comments."; |
| continue; |
| } |
| |
| // Supporting persistent state is a prerequsite for supporting persistent |
| // sessions. |
| if (properties->GetPersistentStateSupport() == |
| EmeFeatureSupport::NOT_SUPPORTED) { |
| DCHECK(properties->GetPersistentLicenseSessionSupport() == |
| EmeSessionTypeSupport::NOT_SUPPORTED); |
| DCHECK(properties->GetPersistentReleaseMessageSessionSupport() == |
| EmeSessionTypeSupport::NOT_SUPPORTED); |
| } |
| |
| // persistent-release-message sessions are not currently supported. |
| // http://crbug.com/448888 |
| DCHECK(properties->GetPersistentReleaseMessageSessionSupport() == |
| EmeSessionTypeSupport::NOT_SUPPORTED); |
| |
| // If distinctive identifiers are not supported, then no other features can |
| // require them. |
| if (properties->GetDistinctiveIdentifierSupport() == |
| EmeFeatureSupport::NOT_SUPPORTED) { |
| DCHECK(properties->GetPersistentLicenseSessionSupport() != |
| EmeSessionTypeSupport::SUPPORTED_WITH_IDENTIFIER); |
| DCHECK(properties->GetPersistentReleaseMessageSessionSupport() != |
| EmeSessionTypeSupport::SUPPORTED_WITH_IDENTIFIER); |
| } |
| |
| // Distinctive identifiers and persistent state can only be reliably blocked |
| // (and therefore be safely configurable) for Pepper-hosted key systems. For |
| // other platforms assume the CDM can and will do anything, except for the |
| // following two cases: |
| // 1) AES decryptor, and |
| // 2) External Clear Key key system on Android, only enabled for testing. |
| bool can_block = properties->UseAesDecryptor(); |
| #if defined(ENABLE_PEPPER_CDMS) |
| DCHECK_EQ(properties->UseAesDecryptor(), |
| properties->GetPepperType().empty()); |
| if (!properties->GetPepperType().empty()) can_block = true; |
| #elif defined(OS_ANDROID) |
| if (IsExternalClearKey(properties->GetKeySystemName())) can_block = true; |
| #endif |
| if (!can_block) { |
| DCHECK(properties->GetDistinctiveIdentifierSupport() == |
| EmeFeatureSupport::ALWAYS_ENABLED); |
| DCHECK(properties->GetPersistentStateSupport() == |
| EmeFeatureSupport::ALWAYS_ENABLED); |
| } |
| |
| DCHECK_EQ(key_system_properties_map_.count(properties->GetKeySystemName()), |
| 0u) |
| << "Key system '" << properties->GetKeySystemName() |
| << "' already registered"; |
| |
| #if defined(OS_ANDROID) |
| // Ensure that the renderer can access the decoders necessary to use the |
| // key system. |
| if (!properties->UseAesDecryptor() && !ArePlatformDecodersAvailable()) { |
| DLOG(WARNING) << properties->GetKeySystemName() << " not registered"; |
| continue; |
| } |
| #endif // defined(OS_ANDROID) |
| |
| key_system_properties_map_[properties->GetKeySystemName()] = |
| std::move(properties); |
| } |
| } |
| |
| // Adds the MIME type with the codec mask after verifying the validity. |
| // Only this function should modify |mime_type_to_codec_mask_map_|. |
| void KeySystemsImpl::RegisterMimeType(const std::string& mime_type, |
| EmeCodec codecs_mask) { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| DCHECK(!mime_type_to_codec_mask_map_.count(mime_type)); |
| DCHECK(IsValidMimeTypeCodecsCombination(mime_type, codecs_mask)); |
| |
| mime_type_to_codec_mask_map_[mime_type] = static_cast<EmeCodec>(codecs_mask); |
| } |
| |
| // Returns whether |mime_type| follows a valid format and the specified codecs |
| // are of the correct type based on |*_codec_mask_|. |
| // Only audio/ or video/ MIME types with their respective codecs are allowed. |
| bool KeySystemsImpl::IsValidMimeTypeCodecsCombination( |
| const std::string& mime_type, SupportedCodecs codecs_mask) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| if (!codecs_mask) return false; |
| if (base::StartsWith(mime_type, "audio/", base::CompareCase::SENSITIVE)) |
| return !(codecs_mask & ~audio_codec_mask_); |
| if (base::StartsWith(mime_type, "video/", base::CompareCase::SENSITIVE)) |
| return !(codecs_mask & ~video_codec_mask_); |
| |
| return false; |
| } |
| |
| bool KeySystemsImpl::IsSupportedInitDataType( |
| const std::string& key_system, EmeInitDataType init_data_type) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| KeySystemPropertiesMap::const_iterator key_system_iter = |
| key_system_properties_map_.find(key_system); |
| if (key_system_iter == key_system_properties_map_.end()) { |
| NOTREACHED(); |
| return false; |
| } |
| return key_system_iter->second->IsSupportedInitDataType(init_data_type); |
| } |
| |
| std::string KeySystemsImpl::GetKeySystemNameForUMA( |
| const std::string& key_system) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| KeySystemNameForUMAMap::const_iterator iter = |
| key_system_name_for_uma_map_.find(key_system); |
| if (iter == key_system_name_for_uma_map_.end()) |
| return kUnknownKeySystemNameForUMA; |
| |
| return iter->second; |
| } |
| |
| bool KeySystemsImpl::UseAesDecryptor(const std::string& key_system) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| KeySystemPropertiesMap::const_iterator key_system_iter = |
| key_system_properties_map_.find(key_system); |
| if (key_system_iter == key_system_properties_map_.end()) { |
| DLOG(ERROR) << key_system << " is not a known system"; |
| return false; |
| } |
| return key_system_iter->second->UseAesDecryptor(); |
| } |
| |
| #if defined(ENABLE_PEPPER_CDMS) |
| std::string KeySystemsImpl::GetPepperType(const std::string& key_system) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| KeySystemPropertiesMap::const_iterator key_system_iter = |
| key_system_properties_map_.find(key_system); |
| if (key_system_iter == key_system_properties_map_.end()) { |
| DLOG(FATAL) << key_system << " is not a known system"; |
| return std::string(); |
| } |
| const std::string& type = key_system_iter->second->GetPepperType(); |
| DLOG_IF(FATAL, type.empty()) << key_system_iter->second->GetKeySystemName() |
| << " is not Pepper-based"; |
| return type; |
| } |
| |
| #endif |
| |
| void KeySystemsImpl::AddCodecMask(EmeMediaType media_type, |
| const std::string& codec, uint32_t mask) { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| DCHECK(!codec_string_map_.count(codec)); |
| codec_string_map_[codec] = static_cast<EmeCodec>(mask); |
| if (media_type == EmeMediaType::AUDIO) { |
| audio_codec_mask_ |= mask; |
| } else { |
| video_codec_mask_ |= mask; |
| } |
| } |
| |
| void KeySystemsImpl::AddMimeTypeCodecMask(const std::string& mime_type, |
| uint32_t codecs_mask) { |
| RegisterMimeType(mime_type, static_cast<EmeCodec>(codecs_mask)); |
| } |
| |
| bool KeySystemsImpl::IsSupportedKeySystem(const std::string& key_system) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| if (!key_system_properties_map_.count(key_system)) return false; |
| |
| return true; |
| } |
| |
| EmeConfigRule KeySystemsImpl::GetContentTypeConfigRule( |
| const std::string& key_system, EmeMediaType media_type, |
| const std::string& container_mime_type, |
| const std::vector<std::string>& codecs) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| // Make sure the container MIME type matches |media_type|. |
| switch (media_type) { |
| case EmeMediaType::AUDIO: |
| if (!base::StartsWith(container_mime_type, "audio/", |
| base::CompareCase::SENSITIVE)) |
| return EmeConfigRule::NOT_SUPPORTED; |
| break; |
| case EmeMediaType::VIDEO: |
| if (!base::StartsWith(container_mime_type, "video/", |
| base::CompareCase::SENSITIVE)) |
| return EmeConfigRule::NOT_SUPPORTED; |
| break; |
| } |
| |
| // Look up the key system's supported codecs. |
| KeySystemPropertiesMap::const_iterator key_system_iter = |
| key_system_properties_map_.find(key_system); |
| if (key_system_iter == key_system_properties_map_.end()) { |
| NOTREACHED(); |
| return EmeConfigRule::NOT_SUPPORTED; |
| } |
| |
| SupportedCodecs key_system_codec_mask = |
| key_system_iter->second->GetSupportedCodecs(); |
| #if defined(OS_ANDROID) |
| SupportedCodecs key_system_secure_codec_mask = |
| key_system_iter->second->GetSupportedSecureCodecs(); |
| #endif // defined(OS_ANDROID) |
| |
| // Check that the container is supported by the key system. (This check is |
| // necessary because |codecs| may be empty.) |
| SupportedCodecs mime_type_codec_mask = |
| GetCodecMaskForMimeType(container_mime_type); |
| if ((key_system_codec_mask & mime_type_codec_mask) == 0) |
| return EmeConfigRule::NOT_SUPPORTED; |
| |
| // Check that the codecs are supported by the key system and container. |
| EmeConfigRule support = EmeConfigRule::SUPPORTED; |
| for (size_t i = 0; i < codecs.size(); i++) { |
| SupportedCodecs codec = GetCodecForString(codecs[i]); |
| if ((codec & key_system_codec_mask & mime_type_codec_mask) == 0) |
| return EmeConfigRule::NOT_SUPPORTED; |
| #if defined(OS_ANDROID) |
| // Check whether the codec supports a hardware-secure mode. The goal is to |
| // prevent mixing of non-hardware-secure codecs with hardware-secure codecs, |
| // since the mode is fixed at CDM creation. |
| // |
| // Because the check for regular codec support is early-exit, we don't have |
| // to consider codecs that are only supported in hardware-secure mode. We |
| // could do so, and make use of HW_SECURE_CODECS_REQUIRED, if it turns out |
| // that hardware-secure-only codecs actually exist and are useful. |
| if ((codec & key_system_secure_codec_mask) == 0) |
| support = EmeConfigRule::HW_SECURE_CODECS_NOT_ALLOWED; |
| #endif // defined(OS_ANDROID) |
| } |
| |
| return support; |
| } |
| |
| EmeConfigRule KeySystemsImpl::GetRobustnessConfigRule( |
| const std::string& key_system, EmeMediaType media_type, |
| const std::string& requested_robustness) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| KeySystemPropertiesMap::const_iterator key_system_iter = |
| key_system_properties_map_.find(key_system); |
| if (key_system_iter == key_system_properties_map_.end()) { |
| NOTREACHED(); |
| return EmeConfigRule::NOT_SUPPORTED; |
| } |
| return key_system_iter->second->GetRobustnessConfigRule(media_type, |
| requested_robustness); |
| } |
| |
| EmeSessionTypeSupport KeySystemsImpl::GetPersistentLicenseSessionSupport( |
| const std::string& key_system) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| KeySystemPropertiesMap::const_iterator key_system_iter = |
| key_system_properties_map_.find(key_system); |
| if (key_system_iter == key_system_properties_map_.end()) { |
| NOTREACHED(); |
| return EmeSessionTypeSupport::INVALID; |
| } |
| return key_system_iter->second->GetPersistentLicenseSessionSupport(); |
| } |
| |
| EmeSessionTypeSupport KeySystemsImpl::GetPersistentReleaseMessageSessionSupport( |
| const std::string& key_system) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| KeySystemPropertiesMap::const_iterator key_system_iter = |
| key_system_properties_map_.find(key_system); |
| if (key_system_iter == key_system_properties_map_.end()) { |
| NOTREACHED(); |
| return EmeSessionTypeSupport::INVALID; |
| } |
| return key_system_iter->second->GetPersistentReleaseMessageSessionSupport(); |
| } |
| |
| EmeFeatureSupport KeySystemsImpl::GetPersistentStateSupport( |
| const std::string& key_system) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| KeySystemPropertiesMap::const_iterator key_system_iter = |
| key_system_properties_map_.find(key_system); |
| if (key_system_iter == key_system_properties_map_.end()) { |
| NOTREACHED(); |
| return EmeFeatureSupport::INVALID; |
| } |
| return key_system_iter->second->GetPersistentStateSupport(); |
| } |
| |
| EmeFeatureSupport KeySystemsImpl::GetDistinctiveIdentifierSupport( |
| const std::string& key_system) const { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| KeySystemPropertiesMap::const_iterator key_system_iter = |
| key_system_properties_map_.find(key_system); |
| if (key_system_iter == key_system_properties_map_.end()) { |
| NOTREACHED(); |
| return EmeFeatureSupport::INVALID; |
| } |
| return key_system_iter->second->GetDistinctiveIdentifierSupport(); |
| } |
| |
| KeySystems* KeySystems::GetInstance() { return KeySystemsImpl::GetInstance(); } |
| |
| //------------------------------------------------------------------------------ |
| |
| bool IsSupportedKeySystemWithInitDataType(const std::string& key_system, |
| EmeInitDataType init_data_type) { |
| return KeySystemsImpl::GetInstance()->IsSupportedInitDataType(key_system, |
| init_data_type); |
| } |
| |
| std::string GetKeySystemNameForUMA(const std::string& key_system) { |
| return KeySystemsImpl::GetInstance()->GetKeySystemNameForUMA(key_system); |
| } |
| |
| bool CanUseAesDecryptor(const std::string& key_system) { |
| return KeySystemsImpl::GetInstance()->UseAesDecryptor(key_system); |
| } |
| |
| #if defined(ENABLE_PEPPER_CDMS) |
| std::string GetPepperType(const std::string& key_system) { |
| return KeySystemsImpl::GetInstance()->GetPepperType(key_system); |
| } |
| #endif |
| |
| // These two functions are for testing purpose only. The declaration in the |
| // header file is guarded by "#if defined(UNIT_TEST)" so that they can be used |
| // by tests but not non-test code. However, this .cc file is compiled as part of |
| // "media" where "UNIT_TEST" is not defined. So we need to specify |
| // "MEDIA_EXPORT" here again so that they are visible to tests. |
| |
| MEDIA_EXPORT void AddCodecMask(EmeMediaType media_type, |
| const std::string& codec, uint32_t mask) { |
| KeySystemsImpl::GetInstance()->AddCodecMask(media_type, codec, mask); |
| } |
| |
| MEDIA_EXPORT void AddMimeTypeCodecMask(const std::string& mime_type, |
| uint32_t mask) { |
| KeySystemsImpl::GetInstance()->AddMimeTypeCodecMask(mime_type, mask); |
| } |
| |
| } // namespace media |
| } // namespace cobalt |