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gecko-dev/dom/media/gmp/widevine-adapter/content_decryption_module.h

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// 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_
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