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Diffstat (limited to 'dom/media/gmp/widevine-adapter/content_decryption_module.h')
| -rw-r--r-- | dom/media/gmp/widevine-adapter/content_decryption_module.h | 1278 |
1 files changed, 0 insertions, 1278 deletions
diff --git a/dom/media/gmp/widevine-adapter/content_decryption_module.h b/dom/media/gmp/widevine-adapter/content_decryption_module.h deleted file mode 100644 index 0539135fbe..0000000000 --- a/dom/media/gmp/widevine-adapter/content_decryption_module.h +++ /dev/null @@ -1,1278 +0,0 @@ -// Copyright (c) 2012 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. - -#ifndef CDM_CONTENT_DECRYPTION_MODULE_H_ -#define CDM_CONTENT_DECRYPTION_MODULE_H_ - -#include "content_decryption_module_export.h" - -#if defined(_MSC_VER) -typedef unsigned char uint8_t; -typedef unsigned int uint32_t; -typedef int int32_t; -typedef __int64 int64_t; -#else -#include <stdint.h> -#endif - -// Define CDM_CLASS_API to export class types. We have to add visibility -// attributes to make sure virtual tables in CDM consumer and CDM implementation -// are the same. Generally, it was always a good idea, as there're no guarantees -// about that for the internal symbols, but it has only become a practical issue -// after introduction of LTO devirtualization. See more details on -// https://crbug.com/609564#c35 -#if defined(_WIN32) -#if defined(__clang__) -#define CDM_CLASS_API [[clang::lto_visibility_public]] -#else -#define CDM_CLASS_API -#endif -#else // defined(_WIN32) -#define CDM_CLASS_API __attribute__((visibility("default"))) -#endif // defined(_WIN32) - -// The version number must be rolled when the exported functions are updated! -// If the CDM and the adapter use different versions of these functions, the -// adapter will fail to load or crash! -#define CDM_MODULE_VERSION 4 - -// Build the versioned entrypoint name. -// The extra macros are necessary to expand version to an actual value. -#define INITIALIZE_CDM_MODULE \ - BUILD_ENTRYPOINT(InitializeCdmModule, CDM_MODULE_VERSION) -#define BUILD_ENTRYPOINT(name, version) \ - BUILD_ENTRYPOINT_NO_EXPANSION(name, version) -#define BUILD_ENTRYPOINT_NO_EXPANSION(name, version) name##_##version - -extern "C" { -CDM_API void INITIALIZE_CDM_MODULE(); - -CDM_API void DeinitializeCdmModule(); - -// Returns a pointer to the requested CDM Host interface upon success. -// Returns NULL if the requested CDM Host interface is not supported. -// The caller should cast the returned pointer to the type matching -// |host_interface_version|. -typedef void* (*GetCdmHostFunc)(int host_interface_version, void* user_data); - -// Returns a pointer to the requested CDM upon success. -// Returns NULL if an error occurs or the requested |cdm_interface_version| or -// |key_system| is not supported or another error occurs. -// The caller should cast the returned pointer to the type matching -// |cdm_interface_version|. -// Caller retains ownership of arguments and must call Destroy() on the returned -// object. -CDM_API void* CreateCdmInstance( - int cdm_interface_version, - const char* key_system, uint32_t key_system_size, - GetCdmHostFunc get_cdm_host_func, void* user_data); - -CDM_API const char* GetCdmVersion(); -} - -namespace cdm { - -class CDM_CLASS_API AudioFrames; -class CDM_CLASS_API DecryptedBlock; -class CDM_CLASS_API VideoFrame; - -class CDM_CLASS_API Host_8; -class CDM_CLASS_API Host_9; - -enum Status { - kSuccess = 0, - kNeedMoreData, // Decoder needs more data to produce a decoded frame/sample. - kNoKey, // The required decryption key is not available. - kInitializationError, // Initialization error. - kDecryptError, // Decryption failed. - kDecodeError, // Error decoding audio or video. - kDeferredInitialization // Decoder is not ready for initialization. -}; - -// This must at least contain the exceptions defined in the spec: -// https://w3c.github.io/encrypted-media/#exceptions -// The following starts with the list of DOM4 exceptions from: -// http://www.w3.org/TR/dom/#domexception -// Some DOM4 exceptions are not included as they are not expected to be used. -// Should only be used on Host_8 and before. -enum Error { - kNotSupportedError = 9, - kInvalidStateError = 11, - kInvalidAccessError = 15, - kQuotaExceededError = 22, - - // Additional exceptions that do not have assigned codes. - // There are other non-EME-specific values, not included in this list. - kUnknownError = 30, - - // Additional values from previous EME versions. They currently have no - // matching DOMException. - kClientError = 100, - kOutputError = 101 -}; - -// Exceptions used by the CDM to reject promises. -// https://w3c.github.io/encrypted-media/#exceptions -enum Exception { - kExceptionTypeError, - kExceptionNotSupportedError, - kExceptionInvalidStateError, - kExceptionQuotaExceededError -}; - -// Time is defined as the number of seconds since the Epoch -// (00:00:00 UTC, January 1, 1970), not including any added leap second. -// Also see Time definition in spec: https://w3c.github.io/encrypted-media/#time -// Note that Time is defined in millisecond accuracy in the spec but in second -// accuracy here. -typedef double Time; - -// An input buffer can be split into several continuous subsamples. -// A SubsampleEntry specifies the number of clear and cipher bytes in each -// subsample. For example, the following buffer has three subsamples: -// -// |<----- subsample1 ----->|<----- subsample2 ----->|<----- subsample3 ----->| -// | clear1 | cipher1 | clear2 | cipher2 | clear3 | cipher3 | -// -// For decryption, all of the cipher bytes in a buffer should be concatenated -// (in the subsample order) into a single logical stream. The clear bytes should -// not be considered as part of decryption. -// -// Stream to decrypt: | cipher1 | cipher2 | cipher3 | -// Decrypted stream: | decrypted1| decrypted2 | decrypted3 | -// -// After decryption, the decrypted bytes should be copied over the position -// of the corresponding cipher bytes in the original buffer to form the output -// buffer. Following the above example, the decrypted buffer should be: -// -// |<----- subsample1 ----->|<----- subsample2 ----->|<----- subsample3 ----->| -// | clear1 | decrypted1| clear2 | decrypted2 | clear3 | decrypted3 | -// -struct SubsampleEntry { - SubsampleEntry(uint32_t clear_bytes, uint32_t cipher_bytes) - : clear_bytes(clear_bytes), cipher_bytes(cipher_bytes) {} - - uint32_t clear_bytes; - uint32_t cipher_bytes; -}; - -// Represents an input buffer to be decrypted (and possibly decoded). It does -// not own any pointers in this struct. If |iv_size| = 0, the data is -// unencrypted. -struct InputBuffer { - InputBuffer() - : data(nullptr), - data_size(0), - key_id(nullptr), - key_id_size(0), - iv(nullptr), - iv_size(0), - subsamples(nullptr), - num_subsamples(0), - timestamp(0) {} - - const uint8_t* data; // Pointer to the beginning of the input data. - uint32_t data_size; // Size (in bytes) of |data|. - - const uint8_t* key_id; // Key ID to identify the decryption key. - uint32_t key_id_size; // Size (in bytes) of |key_id|. - - const uint8_t* iv; // Initialization vector. - uint32_t iv_size; // Size (in bytes) of |iv|. - - const struct SubsampleEntry* subsamples; - uint32_t num_subsamples; // Number of subsamples in |subsamples|. - - int64_t timestamp; // Presentation timestamp in microseconds. -}; - -struct AudioDecoderConfig { - enum AudioCodec { - kUnknownAudioCodec = 0, - kCodecVorbis, - kCodecAac - }; - - AudioDecoderConfig() - : codec(kUnknownAudioCodec), - channel_count(0), - bits_per_channel(0), - samples_per_second(0), - extra_data(nullptr), - extra_data_size(0) {} - - AudioCodec codec; - int32_t channel_count; - int32_t bits_per_channel; - int32_t samples_per_second; - - // Optional byte data required to initialize audio decoders, such as the - // vorbis setup header. - uint8_t* extra_data; - uint32_t extra_data_size; -}; - -// Supported sample formats for AudioFrames. -enum AudioFormat { - kUnknownAudioFormat = 0, // Unknown format value. Used for error reporting. - kAudioFormatU8, // Interleaved unsigned 8-bit w/ bias of 128. - kAudioFormatS16, // Interleaved signed 16-bit. - kAudioFormatS32, // Interleaved signed 32-bit. - kAudioFormatF32, // Interleaved float 32-bit. - kAudioFormatPlanarS16, // Signed 16-bit planar. - kAudioFormatPlanarF32, // Float 32-bit planar. -}; - -// Surface formats based on FOURCC labels, see: http://www.fourcc.org/yuv.php -// Values are chosen to be consistent with Chromium's VideoPixelFormat values. -enum VideoFormat { - kUnknownVideoFormat = 0, // Unknown format value. Used for error reporting. - kYv12 = 1, // 12bpp YVU planar 1x1 Y, 2x2 VU samples. - kI420 = 2, // 12bpp YUV planar 1x1 Y, 2x2 UV samples. - - // In the following formats, each sample uses 16-bit in storage, while the - // sample value is stored in the least significant N bits where N is - // specified by the number after "P". For example, for YUV420P9, each Y, U, - // and V sample is stored in the least significant 9 bits in a 2-byte block. - kYUV420P9 = 16, - kYUV420P10 = 17, - kYUV422P9 = 18, - kYUV422P10 = 19, - kYUV444P9 = 20, - kYUV444P10 = 21, - kYUV420P12 = 22, - kYUV422P12 = 23, - kYUV444P12 = 24, -}; - -struct Size { - Size() : width(0), height(0) {} - Size(int32_t width, int32_t height) : width(width), height(height) {} - - int32_t width; - int32_t height; -}; - -struct VideoDecoderConfig { - enum VideoCodec { - kUnknownVideoCodec = 0, - kCodecVp8, - kCodecH264, - kCodecVp9 - }; - - enum VideoCodecProfile { - kUnknownVideoCodecProfile = 0, - kProfileNotNeeded, - kH264ProfileBaseline, - kH264ProfileMain, - kH264ProfileExtended, - kH264ProfileHigh, - kH264ProfileHigh10, - kH264ProfileHigh422, - kH264ProfileHigh444Predictive, - // VP9 Profiles are only passed in starting from CDM_9. - kVP9Profile0, - kVP9Profile1, - kVP9Profile2, - kVP9Profile3 - }; - - VideoDecoderConfig() - : codec(kUnknownVideoCodec), - profile(kUnknownVideoCodecProfile), - format(kUnknownVideoFormat), - extra_data(nullptr), - extra_data_size(0) {} - - VideoCodec codec; - VideoCodecProfile profile; - VideoFormat format; - - // Width and height of video frame immediately post-decode. Not all pixels - // in this region are valid. - Size coded_size; - - // Optional byte data required to initialize video decoders, such as H.264 - // AAVC data. - uint8_t* extra_data; - uint32_t extra_data_size; -}; - -enum StreamType { - kStreamTypeAudio = 0, - kStreamTypeVideo = 1 -}; - -// Structure provided to ContentDecryptionModule::OnPlatformChallengeResponse() -// after a platform challenge was initiated via Host::SendPlatformChallenge(). -// All values will be NULL / zero in the event of a challenge failure. -struct PlatformChallengeResponse { - // |challenge| provided during Host::SendPlatformChallenge() combined with - // nonce data and signed with the platform's private key. - const uint8_t* signed_data; - uint32_t signed_data_length; - - // RSASSA-PKCS1-v1_5-SHA256 signature of the |signed_data| block. - const uint8_t* signed_data_signature; - uint32_t signed_data_signature_length; - - // X.509 device specific certificate for the |service_id| requested. - const uint8_t* platform_key_certificate; - uint32_t platform_key_certificate_length; -}; - -// Used when passing arrays of binary data. Does not own the referenced data. -struct BinaryData { - BinaryData() : data(nullptr), length(0) {} - const uint8_t* data; - uint32_t length; -}; - -// The current status of the associated key. The valid types are defined in the -// spec: https://w3c.github.io/encrypted-media/#idl-def-MediaKeyStatus -enum KeyStatus { - kUsable = 0, - kInternalError = 1, - kExpired = 2, - kOutputRestricted = 3, - kOutputDownscaled = 4, - kStatusPending = 5, - kReleased = 6 -}; - -// Used when passing arrays of key information. Does not own the referenced -// data. |system_code| is an additional error code for unusable keys and -// should be 0 when |status| == kUsable. -struct KeyInformation { - KeyInformation() - : key_id(nullptr), - key_id_size(0), - status(kInternalError), - system_code(0) {} - const uint8_t* key_id; - uint32_t key_id_size; - KeyStatus status; - uint32_t system_code; -}; - -// Supported output protection methods for use with EnableOutputProtection() and -// returned by OnQueryOutputProtectionStatus(). -enum OutputProtectionMethods { - kProtectionNone = 0, - kProtectionHDCP = 1 << 0 -}; - -// Connected output link types returned by OnQueryOutputProtectionStatus(). -enum OutputLinkTypes { - kLinkTypeNone = 0, - kLinkTypeUnknown = 1 << 0, - kLinkTypeInternal = 1 << 1, - kLinkTypeVGA = 1 << 2, - kLinkTypeHDMI = 1 << 3, - kLinkTypeDVI = 1 << 4, - kLinkTypeDisplayPort = 1 << 5, - kLinkTypeNetwork = 1 << 6 -}; - -// Result of the QueryOutputProtectionStatus() call. -enum QueryResult { - kQuerySucceeded = 0, - kQueryFailed -}; - -// The Initialization Data Type. The valid types are defined in the spec: -// http://w3c.github.io/encrypted-media/initdata-format-registry.html#registry -enum InitDataType { - kCenc = 0, - kKeyIds = 1, - kWebM = 2 -}; - -// The type of session to create. The valid types are defined in the spec: -// https://w3c.github.io/encrypted-media/#idl-def-SessionType -enum SessionType { - kTemporary = 0, - kPersistentLicense = 1, - kPersistentKeyRelease = 2 -}; - -// The type of the message event. The valid types are defined in the spec: -// https://w3c.github.io/encrypted-media/#idl-def-MediaKeyMessageType -enum MessageType { - kLicenseRequest = 0, - kLicenseRenewal = 1, - kLicenseRelease = 2 -}; - -enum HdcpVersion { - kHdcpVersionNone, - kHdcpVersion1_0, - kHdcpVersion1_1, - kHdcpVersion1_2, - kHdcpVersion1_3, - kHdcpVersion1_4, - kHdcpVersion2_0, - kHdcpVersion2_1, - kHdcpVersion2_2 -}; - -struct Policy { - Policy() : min_hdcp_version(kHdcpVersionNone) {} - - HdcpVersion min_hdcp_version; -}; - -// FileIO interface provides a way for the CDM to store data in a file in -// persistent storage. This interface aims only at providing basic read/write -// capabilities and should not be used as a full fledged file IO API. -// Each CDM and origin (e.g. HTTPS, "foo.example.com", 443) combination has -// its own persistent storage. All instances of a given CDM associated with a -// given origin share the same persistent storage. -// Note to implementors of this interface: -// Per-origin storage and the ability for users to clear it are important. -// See http://www.w3.org/TR/encrypted-media/#privacy-storedinfo. -class CDM_CLASS_API FileIO { - public: - // Opens the file with |file_name| for read and write. - // FileIOClient::OnOpenComplete() will be called after the opening - // operation finishes. - // - When the file is opened by a CDM instance, it will be classified as "in - // use". In this case other CDM instances in the same domain may receive - // kInUse status when trying to open it. - // - |file_name| must only contain letters (A-Za-z), digits(0-9), or "._-". - // It must not start with an underscore ('_'), and must be at least 1 - // character and no more than 256 characters long. - virtual void Open(const char* file_name, uint32_t file_name_size) = 0; - - // Reads the contents of the file. FileIOClient::OnReadComplete() will be - // called with the read status. Read() should not be called if a previous - // Read() or Write() call is still pending; otherwise OnReadComplete() will - // be called with kInUse. - virtual void Read() = 0; - - // Writes |data_size| bytes of |data| into the file. - // FileIOClient::OnWriteComplete() will be called with the write status. - // All existing contents in the file will be overwritten. Calling Write() with - // NULL |data| will clear all contents in the file. Write() should not be - // called if a previous Write() or Read() call is still pending; otherwise - // OnWriteComplete() will be called with kInUse. - virtual void Write(const uint8_t* data, uint32_t data_size) = 0; - - // Closes the file if opened, destroys this FileIO object and releases any - // resources allocated. The CDM must call this method when it finished using - // this object. A FileIO object must not be used after Close() is called. - virtual void Close() = 0; - - protected: - FileIO() {} - virtual ~FileIO() {} -}; - -// Responses to FileIO calls. All responses will be called asynchronously. -// When kError is returned, the FileIO object could be in an error state. All -// following calls (other than Close()) could return kError. The CDM should -// still call Close() to destroy the FileIO object. -class CDM_CLASS_API FileIOClient { - public: - enum Status { - kSuccess = 0, - kInUse, - kError - }; - - // Response to a FileIO::Open() call with the open |status|. - virtual void OnOpenComplete(Status status) = 0; - - // Response to a FileIO::Read() call to provide |data_size| bytes of |data| - // read from the file. - // - kSuccess indicates that all contents of the file has been successfully - // read. In this case, 0 |data_size| means that the file is empty. - // - kInUse indicates that there are other read/write operations pending. - // - kError indicates read failure, e.g. the storage is not open or cannot be - // fully read. - virtual void OnReadComplete(Status status, - const uint8_t* data, uint32_t data_size) = 0; - - // Response to a FileIO::Write() call. - // - kSuccess indicates that all the data has been written into the file - // successfully. - // - kInUse indicates that there are other read/write operations pending. - // - kError indicates write failure, e.g. the storage is not open or cannot be - // fully written. Upon write failure, the contents of the file should be - // regarded as corrupt and should not used. - virtual void OnWriteComplete(Status status) = 0; - - protected: - FileIOClient() {} - virtual ~FileIOClient() {} -}; - -// ContentDecryptionModule interface that all CDMs need to implement. -// The interface is versioned for backward compatibility. -// Note: ContentDecryptionModule implementations must use the allocator -// provided in CreateCdmInstance() to allocate any Buffer that needs to -// be passed back to the caller. Implementations must call Buffer::Destroy() -// when a Buffer is created that will never be returned to the caller. -class CDM_CLASS_API ContentDecryptionModule_8 { - public: - static const int kVersion = 8; - typedef Host_8 Host; - - // Initializes the CDM instance, providing information about permitted - // functionalities. - // If |allow_distinctive_identifier| is false, messages from the CDM, - // such as message events, must not contain a Distinctive Identifier, - // even in an encrypted form. - // If |allow_persistent_state| is false, the CDM must not attempt to - // persist state. Calls to CreateFileIO() will fail. - virtual void Initialize(bool allow_distinctive_identifier, - bool allow_persistent_state) = 0; - - // SetServerCertificate(), CreateSessionAndGenerateRequest(), LoadSession(), - // UpdateSession(), CloseSession(), and RemoveSession() all accept a - // |promise_id|, which must be passed to the completion Host method - // (e.g. Host::OnResolveNewSessionPromise()). - - // Provides a server certificate to be used to encrypt messages to the - // license server. The CDM must respond by calling either - // Host::OnResolvePromise() or Host::OnRejectPromise(). - virtual void SetServerCertificate(uint32_t promise_id, - const uint8_t* server_certificate_data, - uint32_t server_certificate_data_size) = 0; - - // Creates a session given |session_type|, |init_data_type|, and |init_data|. - // The CDM must respond by calling either Host::OnResolveNewSessionPromise() - // or Host::OnRejectPromise(). - virtual void CreateSessionAndGenerateRequest(uint32_t promise_id, - SessionType session_type, - InitDataType init_data_type, - const uint8_t* init_data, - uint32_t init_data_size) = 0; - - // Loads the session of type |session_type| specified by |session_id|. - // The CDM must respond by calling either Host::OnResolveNewSessionPromise() - // or Host::OnRejectPromise(). If the session is not found, call - // Host::OnResolveNewSessionPromise() with session_id = NULL. - virtual void LoadSession(uint32_t promise_id, - SessionType session_type, - const char* session_id, - uint32_t session_id_size) = 0; - - // Updates the session with |response|. The CDM must respond by calling - // either Host::OnResolvePromise() or Host::OnRejectPromise(). - virtual void UpdateSession(uint32_t promise_id, - const char* session_id, - uint32_t session_id_size, - const uint8_t* response, - uint32_t response_size) = 0; - - // Requests that the CDM close the session. The CDM must respond by calling - // either Host::OnResolvePromise() or Host::OnRejectPromise() when the request - // has been processed. This may be before the session is closed. Once the - // session is closed, Host::OnSessionClosed() must also be called. - virtual void CloseSession(uint32_t promise_id, - const char* session_id, - uint32_t session_id_size) = 0; - - // Removes any stored session data associated with this session. Will only be - // called for persistent sessions. The CDM must respond by calling either - // Host::OnResolvePromise() or Host::OnRejectPromise() when the request has - // been processed. - virtual void RemoveSession(uint32_t promise_id, - const char* session_id, - uint32_t session_id_size) = 0; - - // Performs scheduled operation with |context| when the timer fires. - virtual void TimerExpired(void* context) = 0; - - // Decrypts the |encrypted_buffer|. - // - // Returns kSuccess if decryption succeeded, in which case the callee - // should have filled the |decrypted_buffer| and passed the ownership of - // |data| in |decrypted_buffer| to the caller. - // Returns kNoKey if the CDM did not have the necessary decryption key - // to decrypt. - // Returns kDecryptError if any other error happened. - // If the return value is not kSuccess, |decrypted_buffer| should be ignored - // by the caller. - virtual Status Decrypt(const InputBuffer& encrypted_buffer, - DecryptedBlock* decrypted_buffer) = 0; - - // Initializes the CDM audio decoder with |audio_decoder_config|. This - // function must be called before DecryptAndDecodeSamples() is called. - // - // Returns kSuccess if the |audio_decoder_config| is supported and the CDM - // audio decoder is successfully initialized. - // Returns kSessionError if |audio_decoder_config| is not supported. The CDM - // may still be able to do Decrypt(). - // Returns kDeferredInitialization if the CDM is not ready to initialize the - // decoder at this time. Must call Host::OnDeferredInitializationDone() once - // initialization is complete. - virtual Status InitializeAudioDecoder( - const AudioDecoderConfig& audio_decoder_config) = 0; - - // Initializes the CDM video decoder with |video_decoder_config|. This - // function must be called before DecryptAndDecodeFrame() is called. - // - // Returns kSuccess if the |video_decoder_config| is supported and the CDM - // video decoder is successfully initialized. - // Returns kSessionError if |video_decoder_config| is not supported. The CDM - // may still be able to do Decrypt(). - // Returns kDeferredInitialization if the CDM is not ready to initialize the - // decoder at this time. Must call Host::OnDeferredInitializationDone() once - // initialization is complete. - virtual Status InitializeVideoDecoder( - const VideoDecoderConfig& video_decoder_config) = 0; - - // De-initializes the CDM decoder and sets it to an uninitialized state. The - // caller can initialize the decoder again after this call to re-initialize - // it. This can be used to reconfigure the decoder if the configuration - // changes. - virtual void DeinitializeDecoder(StreamType decoder_type) = 0; - - // Resets the CDM decoder to an initialized clean state. All internal buffers - // MUST be flushed. - virtual void ResetDecoder(StreamType decoder_type) = 0; - - // Decrypts the |encrypted_buffer| and decodes the decrypted buffer into a - // |video_frame|. Upon end-of-stream, the caller should call this function - // repeatedly with empty |encrypted_buffer| (|data| == NULL) until only empty - // |video_frame| (|format| == kEmptyVideoFrame) is produced. - // - // Returns kSuccess if decryption and decoding both succeeded, in which case - // the callee will have filled the |video_frame| and passed the ownership of - // |frame_buffer| in |video_frame| to the caller. - // Returns kNoKey if the CDM did not have the necessary decryption key - // to decrypt. - // Returns kNeedMoreData if more data was needed by the decoder to generate - // a decoded frame (e.g. during initialization and end-of-stream). - // Returns kDecryptError if any decryption error happened. - // Returns kDecodeError if any decoding error happened. - // If the return value is not kSuccess, |video_frame| should be ignored by - // the caller. - virtual Status DecryptAndDecodeFrame(const InputBuffer& encrypted_buffer, - VideoFrame* video_frame) = 0; - - // Decrypts the |encrypted_buffer| and decodes the decrypted buffer into - // |audio_frames|. Upon end-of-stream, the caller should call this function - // repeatedly with empty |encrypted_buffer| (|data| == NULL) until only empty - // |audio_frames| is produced. - // - // Returns kSuccess if decryption and decoding both succeeded, in which case - // the callee will have filled |audio_frames| and passed the ownership of - // |data| in |audio_frames| to the caller. - // Returns kNoKey if the CDM did not have the necessary decryption key - // to decrypt. - // Returns kNeedMoreData if more data was needed by the decoder to generate - // audio samples (e.g. during initialization and end-of-stream). - // Returns kDecryptError if any decryption error happened. - // Returns kDecodeError if any decoding error happened. - // If the return value is not kSuccess, |audio_frames| should be ignored by - // the caller. - virtual Status DecryptAndDecodeSamples(const InputBuffer& encrypted_buffer, - AudioFrames* audio_frames) = 0; - - // Called by the host after a platform challenge was initiated via - // Host::SendPlatformChallenge(). - virtual void OnPlatformChallengeResponse( - const PlatformChallengeResponse& response) = 0; - - // Called by the host after a call to Host::QueryOutputProtectionStatus(). The - // |link_mask| is a bit mask of OutputLinkTypes and |output_protection_mask| - // is a bit mask of OutputProtectionMethods. If |result| is kQueryFailed, - // then |link_mask| and |output_protection_mask| are undefined and should - // be ignored. - virtual void OnQueryOutputProtectionStatus( - QueryResult result, - uint32_t link_mask, - uint32_t output_protection_mask) = 0; - - // Destroys the object in the same context as it was created. - virtual void Destroy() = 0; - - protected: - ContentDecryptionModule_8() {} - virtual ~ContentDecryptionModule_8() {} -}; - -// ContentDecryptionModule interface that all CDMs need to implement. -// The interface is versioned for backward compatibility. -// Note: ContentDecryptionModule implementations must use the allocator -// provided in CreateCdmInstance() to allocate any Buffer that needs to -// be passed back to the caller. Implementations must call Buffer::Destroy() -// when a Buffer is created that will never be returned to the caller. -class CDM_CLASS_API ContentDecryptionModule_9 { - public: - static const int kVersion = 9; - typedef Host_9 Host; - - // Initializes the CDM instance, providing information about permitted - // functionalities. - // If |allow_distinctive_identifier| is false, messages from the CDM, - // such as message events, must not contain a Distinctive Identifier, - // even in an encrypted form. - // If |allow_persistent_state| is false, the CDM must not attempt to - // persist state. Calls to CreateFileIO() will fail. - virtual void Initialize(bool allow_distinctive_identifier, - bool allow_persistent_state) = 0; - - // Gets the key status if the CDM has a hypothetical key with the |policy|. - // The CDM must respond by calling either Host::OnResolveKeyStatusPromise() - // with the result key status or Host::OnRejectPromise() if an unexpected - // error happened or this method is not supported. - virtual void GetStatusForPolicy(uint32_t promise_id, - const Policy& policy) = 0; - - // SetServerCertificate(), CreateSessionAndGenerateRequest(), LoadSession(), - // UpdateSession(), CloseSession(), and RemoveSession() all accept a - // |promise_id|, which must be passed to the completion Host method - // (e.g. Host::OnResolveNewSessionPromise()). - - // Provides a server certificate to be used to encrypt messages to the - // license server. The CDM must respond by calling either - // Host::OnResolvePromise() or Host::OnRejectPromise(). - virtual void SetServerCertificate(uint32_t promise_id, - const uint8_t* server_certificate_data, - uint32_t server_certificate_data_size) = 0; - - // Creates a session given |session_type|, |init_data_type|, and |init_data|. - // The CDM must respond by calling either Host::OnResolveNewSessionPromise() - // or Host::OnRejectPromise(). - virtual void CreateSessionAndGenerateRequest(uint32_t promise_id, - SessionType session_type, - InitDataType init_data_type, - const uint8_t* init_data, - uint32_t init_data_size) = 0; - - // Loads the session of type |session_type| specified by |session_id|. - // The CDM must respond by calling either Host::OnResolveNewSessionPromise() - // or Host::OnRejectPromise(). If the session is not found, call - // Host::OnResolveNewSessionPromise() with session_id = NULL. - virtual void LoadSession(uint32_t promise_id, - SessionType session_type, - const char* session_id, - uint32_t session_id_size) = 0; - - // Updates the session with |response|. The CDM must respond by calling - // either Host::OnResolvePromise() or Host::OnRejectPromise(). - virtual void UpdateSession(uint32_t promise_id, - const char* session_id, - uint32_t session_id_size, - const uint8_t* response, - uint32_t response_size) = 0; - - // Requests that the CDM close the session. The CDM must respond by calling - // either Host::OnResolvePromise() or Host::OnRejectPromise() when the request - // has been processed. This may be before the session is closed. Once the - // session is closed, Host::OnSessionClosed() must also be called. - virtual void CloseSession(uint32_t promise_id, - const char* session_id, - uint32_t session_id_size) = 0; - - // Removes any stored session data associated with this session. Will only be - // called for persistent sessions. The CDM must respond by calling either - // Host::OnResolvePromise() or Host::OnRejectPromise() when the request has - // been processed. - virtual void RemoveSession(uint32_t promise_id, - const char* session_id, - uint32_t session_id_size) = 0; - - // Performs scheduled operation with |context| when the timer fires. - virtual void TimerExpired(void* context) = 0; - - // Decrypts the |encrypted_buffer|. - // - // Returns kSuccess if decryption succeeded, in which case the callee - // should have filled the |decrypted_buffer| and passed the ownership of - // |data| in |decrypted_buffer| to the caller. - // Returns kNoKey if the CDM did not have the necessary decryption key - // to decrypt. - // Returns kDecryptError if any other error happened. - // If the return value is not kSuccess, |decrypted_buffer| should be ignored - // by the caller. - virtual Status Decrypt(const InputBuffer& encrypted_buffer, - DecryptedBlock* decrypted_buffer) = 0; - - // Initializes the CDM audio decoder with |audio_decoder_config|. This - // function must be called before DecryptAndDecodeSamples() is called. - // - // Returns kSuccess if the |audio_decoder_config| is supported and the CDM - // audio decoder is successfully initialized. - // Returns kInitializationError if |audio_decoder_config| is not supported. - // The CDM may still be able to do Decrypt(). - // Returns kDeferredInitialization if the CDM is not ready to initialize the - // decoder at this time. Must call Host::OnDeferredInitializationDone() once - // initialization is complete. - virtual Status InitializeAudioDecoder( - const AudioDecoderConfig& audio_decoder_config) = 0; - - // Initializes the CDM video decoder with |video_decoder_config|. This - // function must be called before DecryptAndDecodeFrame() is called. - // - // Returns kSuccess if the |video_decoder_config| is supported and the CDM - // video decoder is successfully initialized. - // Returns kInitializationError if |video_decoder_config| is not supported. - // The CDM may still be able to do Decrypt(). - // Returns kDeferredInitialization if the CDM is not ready to initialize the - // decoder at this time. Must call Host::OnDeferredInitializationDone() once - // initialization is complete. - virtual Status InitializeVideoDecoder( - const VideoDecoderConfig& video_decoder_config) = 0; - - // De-initializes the CDM decoder and sets it to an uninitialized state. The - // caller can initialize the decoder again after this call to re-initialize - // it. This can be used to reconfigure the decoder if the configuration - // changes. - virtual void DeinitializeDecoder(StreamType decoder_type) = 0; - - // Resets the CDM decoder to an initialized clean state. All internal buffers - // MUST be flushed. - virtual void ResetDecoder(StreamType decoder_type) = 0; - - // Decrypts the |encrypted_buffer| and decodes the decrypted buffer into a - // |video_frame|. Upon end-of-stream, the caller should call this function - // repeatedly with empty |encrypted_buffer| (|data| == NULL) until only empty - // |video_frame| (|format| == kEmptyVideoFrame) is produced. - // - // Returns kSuccess if decryption and decoding both succeeded, in which case - // the callee will have filled the |video_frame| and passed the ownership of - // |frame_buffer| in |video_frame| to the caller. - // Returns kNoKey if the CDM did not have the necessary decryption key - // to decrypt. - // Returns kNeedMoreData if more data was needed by the decoder to generate - // a decoded frame (e.g. during initialization and end-of-stream). - // Returns kDecryptError if any decryption error happened. - // Returns kDecodeError if any decoding error happened. - // If the return value is not kSuccess, |video_frame| should be ignored by - // the caller. - virtual Status DecryptAndDecodeFrame(const InputBuffer& encrypted_buffer, - VideoFrame* video_frame) = 0; - - // Decrypts the |encrypted_buffer| and decodes the decrypted buffer into - // |audio_frames|. Upon end-of-stream, the caller should call this function - // repeatedly with empty |encrypted_buffer| (|data| == NULL) until only empty - // |audio_frames| is produced. - // - // Returns kSuccess if decryption and decoding both succeeded, in which case - // the callee will have filled |audio_frames| and passed the ownership of - // |data| in |audio_frames| to the caller. - // Returns kNoKey if the CDM did not have the necessary decryption key - // to decrypt. - // Returns kNeedMoreData if more data was needed by the decoder to generate - // audio samples (e.g. during initialization and end-of-stream). - // Returns kDecryptError if any decryption error happened. - // Returns kDecodeError if any decoding error happened. - // If the return value is not kSuccess, |audio_frames| should be ignored by - // the caller. - virtual Status DecryptAndDecodeSamples(const InputBuffer& encrypted_buffer, - AudioFrames* audio_frames) = 0; - - // Called by the host after a platform challenge was initiated via - // Host::SendPlatformChallenge(). - virtual void OnPlatformChallengeResponse( - const PlatformChallengeResponse& response) = 0; - - // Called by the host after a call to Host::QueryOutputProtectionStatus(). The - // |link_mask| is a bit mask of OutputLinkTypes and |output_protection_mask| - // is a bit mask of OutputProtectionMethods. If |result| is kQueryFailed, - // then |link_mask| and |output_protection_mask| are undefined and should - // be ignored. - virtual void OnQueryOutputProtectionStatus( - QueryResult result, - uint32_t link_mask, - uint32_t output_protection_mask) = 0; - - // Called by the host after a call to Host::RequestStorageId(). If the - // version of the storage ID requested is available, |storage_id| and - // |storage_id_size| are set appropriately. |version| will be the same as - // what was requested, unless 0 (latest) was requested, in which case - // |version| will be the actual version number for the |storage_id| returned. - // If the requested version is not available, null/zero will be provided as - // |storage_id| and |storage_id_size|, respectively, and |version| should be - // ignored. - virtual void OnStorageId(uint32_t version, - const uint8_t* storage_id, - uint32_t storage_id_size) = 0; - - // Destroys the object in the same context as it was created. - virtual void Destroy() = 0; - - protected: - ContentDecryptionModule_9() {} - virtual ~ContentDecryptionModule_9() {} -}; - -typedef ContentDecryptionModule_9 ContentDecryptionModule; - -// Represents a buffer created by Allocator implementations. -class CDM_CLASS_API Buffer { - public: - // Destroys the buffer in the same context as it was created. - virtual void Destroy() = 0; - - virtual uint32_t Capacity() const = 0; - virtual uint8_t* Data() = 0; - virtual void SetSize(uint32_t size) = 0; - virtual uint32_t Size() const = 0; - - protected: - Buffer() {} - virtual ~Buffer() {} - - private: - Buffer(const Buffer&); - void operator=(const Buffer&); -}; - -class CDM_CLASS_API Host_8 { - public: - static const int kVersion = 8; - - // Returns a Buffer* containing non-zero members upon success, or NULL on - // failure. The caller owns the Buffer* after this call. The buffer is not - // guaranteed to be zero initialized. The capacity of the allocated Buffer - // is guaranteed to be not less than |capacity|. - virtual Buffer* Allocate(uint32_t capacity) = 0; - - // Requests the host to call ContentDecryptionModule::TimerFired() |delay_ms| - // from now with |context|. - virtual void SetTimer(int64_t delay_ms, void* context) = 0; - - // Returns the current wall time. - virtual Time GetCurrentWallTime() = 0; - - // Called by the CDM when a session is created or loaded and the value for the - // MediaKeySession's sessionId attribute is available (|session_id|). - // This must be called before OnSessionMessage() or - // OnSessionKeysChange() is called for the same session. |session_id_size| - // should not include null termination. - // When called in response to LoadSession(), the |session_id| must be the - // same as the |session_id| passed in LoadSession(), or NULL if the - // session could not be loaded. - virtual void OnResolveNewSessionPromise(uint32_t promise_id, - const char* session_id, - uint32_t session_id_size) = 0; - - // Called by the CDM when a session is updated or released. - virtual void OnResolvePromise(uint32_t promise_id) = 0; - - // Called by the CDM when an error occurs as a result of one of the - // ContentDecryptionModule calls that accept a |promise_id|. - // |error| must be specified, |error_message| and |system_code| - // are optional. |error_message_size| should not include null termination. - virtual void OnRejectPromise(uint32_t promise_id, - Error error, - uint32_t system_code, - const char* error_message, - uint32_t error_message_size) = 0; - - // Called by the CDM when it has a message for session |session_id|. - // Size parameters should not include null termination. - // |legacy_destination_url| is only for supporting the prefixed EME API and - // is ignored by unprefixed EME. It should only be non-null if |message_type| - // is kLicenseRenewal. - virtual void OnSessionMessage(const char* session_id, - uint32_t session_id_size, - MessageType message_type, - const char* message, - uint32_t message_size, - const char* legacy_destination_url, - uint32_t legacy_destination_url_length) = 0; - - // Called by the CDM when there has been a change in keys or their status for - // session |session_id|. |has_additional_usable_key| should be set if a - // key is newly usable (e.g. new key available, previously expired key has - // been renewed, etc.) and the browser should attempt to resume playback. - // |key_ids| is the list of key ids for this session along with their - // current status. |key_ids_count| is the number of entries in |key_ids|. - // Size parameter for |session_id| should not include null termination. - virtual void OnSessionKeysChange(const char* session_id, - uint32_t session_id_size, - bool has_additional_usable_key, - const KeyInformation* keys_info, - uint32_t keys_info_count) = 0; - - // Called by the CDM when there has been a change in the expiration time for - // session |session_id|. This can happen as the result of an Update() call - // or some other event. If this happens as a result of a call to Update(), - // it must be called before resolving the Update() promise. |new_expiry_time| - // represents the time after which the key(s) in the session will no longer - // be usable for decryption. It can be 0 if no such time exists or if the - // license explicitly never expires. Size parameter should not include null - // termination. - virtual void OnExpirationChange(const char* session_id, - uint32_t session_id_size, - Time new_expiry_time) = 0; - - // Called by the CDM when session |session_id| is closed. Size - // parameter should not include null termination. - virtual void OnSessionClosed(const char* session_id, - uint32_t session_id_size) = 0; - - // Called by the CDM when an error occurs in session |session_id| - // unrelated to one of the ContentDecryptionModule calls that accept a - // |promise_id|. |error| must be specified, |error_message| and - // |system_code| are optional. Length parameters should not include null - // termination. - // Note: - // - This method is only for supporting prefixed EME API. - // - This method will be ignored by unprefixed EME. All errors reported - // in this method should probably also be reported by one of other methods. - virtual void OnLegacySessionError( - const char* session_id, uint32_t session_id_length, - Error error, - uint32_t system_code, - const char* error_message, uint32_t error_message_length) = 0; - - // The following are optional methods that may not be implemented on all - // platforms. - - // Sends a platform challenge for the given |service_id|. |challenge| is at - // most 256 bits of data to be signed. Once the challenge has been completed, - // the host will call ContentDecryptionModule::OnPlatformChallengeResponse() - // with the signed challenge response and platform certificate. Size - // parameters should not include null termination. - virtual void SendPlatformChallenge(const char* service_id, - uint32_t service_id_size, - const char* challenge, - uint32_t challenge_size) = 0; - - // Attempts to enable output protection (e.g. HDCP) on the display link. The - // |desired_protection_mask| is a bit mask of OutputProtectionMethods. No - // status callback is issued, the CDM must call QueryOutputProtectionStatus() - // periodically to ensure the desired protections are applied. - virtual void EnableOutputProtection(uint32_t desired_protection_mask) = 0; - - // Requests the current output protection status. Once the host has the status - // it will call ContentDecryptionModule::OnQueryOutputProtectionStatus(). - virtual void QueryOutputProtectionStatus() = 0; - - // Must be called by the CDM if it returned kDeferredInitialization during - // InitializeAudioDecoder() or InitializeVideoDecoder(). - virtual void OnDeferredInitializationDone(StreamType stream_type, - Status decoder_status) = 0; - - // Creates a FileIO object from the host to do file IO operation. Returns NULL - // if a FileIO object cannot be obtained. Once a valid FileIO object is - // returned, |client| must be valid until FileIO::Close() is called. The - // CDM can call this method multiple times to operate on different files. - virtual FileIO* CreateFileIO(FileIOClient* client) = 0; - - protected: - Host_8() {} - virtual ~Host_8() {} -}; - -class CDM_CLASS_API Host_9 { - public: - static const int kVersion = 9; - - // Returns a Buffer* containing non-zero members upon success, or NULL on - // failure. The caller owns the Buffer* after this call. The buffer is not - // guaranteed to be zero initialized. The capacity of the allocated Buffer - // is guaranteed to be not less than |capacity|. - virtual Buffer* Allocate(uint32_t capacity) = 0; - - // Requests the host to call ContentDecryptionModule::TimerFired() |delay_ms| - // from now with |context|. - virtual void SetTimer(int64_t delay_ms, void* context) = 0; - - // Returns the current wall time. - virtual Time GetCurrentWallTime() = 0; - - // Called by the CDM when a key status is available in response to - // GetStatusForPolicy(). - virtual void OnResolveKeyStatusPromise(uint32_t promise_id, - KeyStatus key_status) = 0; - - // Called by the CDM when a session is created or loaded and the value for the - // MediaKeySession's sessionId attribute is available (|session_id|). - // This must be called before OnSessionMessage() or - // OnSessionKeysChange() is called for the same session. |session_id_size| - // should not include null termination. - // When called in response to LoadSession(), the |session_id| must be the - // same as the |session_id| passed in LoadSession(), or NULL if the - // session could not be loaded. - virtual void OnResolveNewSessionPromise(uint32_t promise_id, - const char* session_id, - uint32_t session_id_size) = 0; - - // Called by the CDM when a session is updated or released. - virtual void OnResolvePromise(uint32_t promise_id) = 0; - - // Called by the CDM when an error occurs as a result of one of the - // ContentDecryptionModule calls that accept a |promise_id|. - // |exception| must be specified. |error_message| and |system_code| - // are optional. |error_message_size| should not include null termination. - virtual void OnRejectPromise(uint32_t promise_id, - Exception exception, - uint32_t system_code, - const char* error_message, - uint32_t error_message_size) = 0; - - // Called by the CDM when it has a message for session |session_id|. - // Size parameters should not include null termination. - virtual void OnSessionMessage(const char* session_id, - uint32_t session_id_size, - MessageType message_type, - const char* message, - uint32_t message_size) = 0; - - // Called by the CDM when there has been a change in keys or their status for - // session |session_id|. |has_additional_usable_key| should be set if a - // key is newly usable (e.g. new key available, previously expired key has - // been renewed, etc.) and the browser should attempt to resume playback. - // |key_ids| is the list of key ids for this session along with their - // current status. |key_ids_count| is the number of entries in |key_ids|. - // Size parameter for |session_id| should not include null termination. - virtual void OnSessionKeysChange(const char* session_id, - uint32_t session_id_size, - bool has_additional_usable_key, - const KeyInformation* keys_info, - uint32_t keys_info_count) = 0; - - // Called by the CDM when there has been a change in the expiration time for - // session |session_id|. This can happen as the result of an Update() call - // or some other event. If this happens as a result of a call to Update(), - // it must be called before resolving the Update() promise. |new_expiry_time| - // represents the time after which the key(s) in the session will no longer - // be usable for decryption. It can be 0 if no such time exists or if the - // license explicitly never expires. Size parameter should not include null - // termination. - virtual void OnExpirationChange(const char* session_id, - uint32_t session_id_size, - Time new_expiry_time) = 0; - - // Called by the CDM when session |session_id| is closed. Size - // parameter should not include null termination. - virtual void OnSessionClosed(const char* session_id, - uint32_t session_id_size) = 0; - - // The following are optional methods that may not be implemented on all - // platforms. - - // Sends a platform challenge for the given |service_id|. |challenge| is at - // most 256 bits of data to be signed. Once the challenge has been completed, - // the host will call ContentDecryptionModule::OnPlatformChallengeResponse() - // with the signed challenge response and platform certificate. Size - // parameters should not include null termination. - virtual void SendPlatformChallenge(const char* service_id, - uint32_t service_id_size, - const char* challenge, - uint32_t challenge_size) = 0; - - // Attempts to enable output protection (e.g. HDCP) on the display link. The - // |desired_protection_mask| is a bit mask of OutputProtectionMethods. No - // status callback is issued, the CDM must call QueryOutputProtectionStatus() - // periodically to ensure the desired protections are applied. - virtual void EnableOutputProtection(uint32_t desired_protection_mask) = 0; - - // Requests the current output protection status. Once the host has the status - // it will call ContentDecryptionModule::OnQueryOutputProtectionStatus(). - virtual void QueryOutputProtectionStatus() = 0; - - // Must be called by the CDM if it returned kDeferredInitialization during - // InitializeAudioDecoder() or InitializeVideoDecoder(). - virtual void OnDeferredInitializationDone(StreamType stream_type, - Status decoder_status) = 0; - - // Creates a FileIO object from the host to do file IO operation. Returns NULL - // if a FileIO object cannot be obtained. Once a valid FileIO object is - // returned, |client| must be valid until FileIO::Close() is called. The - // CDM can call this method multiple times to operate on different files. - virtual FileIO* CreateFileIO(FileIOClient* client) = 0; - - // Requests a specific version of the storage ID. A storage ID is a stable, - // device specific ID used by the CDM to securely store persistent data. The - // ID will be returned by the host via ContentDecryptionModule::OnStorageId(). - // If |version| is 0, the latest version will be returned. All |version|s - // that are greater than or equal to 0x80000000 are reserved for the CDM and - // should not be supported or returned by the host. The CDM must not expose - // the ID outside the client device, even in encrypted form. - virtual void RequestStorageId(uint32_t version) = 0; - - protected: - Host_9() {} - virtual ~Host_9() {} -}; - -// Represents a decrypted block that has not been decoded. -class CDM_CLASS_API DecryptedBlock { - public: - virtual void SetDecryptedBuffer(Buffer* buffer) = 0; - virtual Buffer* DecryptedBuffer() = 0; - - // TODO(tomfinegan): Figure out if timestamp is really needed. If it is not, - // we can just pass Buffer pointers around. - virtual void SetTimestamp(int64_t timestamp) = 0; - virtual int64_t Timestamp() const = 0; - - protected: - DecryptedBlock() {} - virtual ~DecryptedBlock() {} -}; - -class CDM_CLASS_API VideoFrame { - public: - enum VideoPlane { - kYPlane = 0, - kUPlane = 1, - kVPlane = 2, - kMaxPlanes = 3, - }; - - virtual void SetFormat(VideoFormat format) = 0; - virtual VideoFormat Format() const = 0; - - virtual void SetSize(cdm::Size size) = 0; - virtual cdm::Size Size() const = 0; - - virtual void SetFrameBuffer(Buffer* frame_buffer) = 0; - virtual Buffer* FrameBuffer() = 0; - - virtual void SetPlaneOffset(VideoPlane plane, uint32_t offset) = 0; - virtual uint32_t PlaneOffset(VideoPlane plane) = 0; - - virtual void SetStride(VideoPlane plane, uint32_t stride) = 0; - virtual uint32_t Stride(VideoPlane plane) = 0; - - virtual void SetTimestamp(int64_t timestamp) = 0; - virtual int64_t Timestamp() const = 0; - - protected: - VideoFrame() {} - virtual ~VideoFrame() {} -}; - -// Represents decrypted and decoded audio frames. AudioFrames can contain -// multiple audio output buffers, which are serialized into this format: -// -// |<------------------- serialized audio buffer ------------------->| -// | int64_t timestamp | int64_t length | length bytes of audio data | -// -// For example, with three audio output buffers, the AudioFrames will look -// like this: -// -// |<----------------- AudioFrames ------------------>| -// | audio buffer 0 | audio buffer 1 | audio buffer 2 | -class CDM_CLASS_API AudioFrames { - public: - virtual void SetFrameBuffer(Buffer* buffer) = 0; - virtual Buffer* FrameBuffer() = 0; - - // The CDM must call this method, providing a valid format, when providing - // frame buffers. Planar data should be stored end to end; e.g., - // |ch1 sample1||ch1 sample2|....|ch1 sample_last||ch2 sample1|... - virtual void SetFormat(AudioFormat format) = 0; - virtual AudioFormat Format() const = 0; - - protected: - AudioFrames() {} - virtual ~AudioFrames() {} -}; - -} // namespace cdm - -#endif // CDM_CONTENT_DECRYPTION_MODULE_H_ |