| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef __DRM_ENGINE_BASE_H__ |
| #define __DRM_ENGINE_BASE_H__ |
| |
| #include <drm/drm_framework_common.h> |
| #include "IDrmEngine.h" |
| |
| namespace android { |
| |
| /** |
| * This class is an interface for plug-in developers |
| * |
| * Responsibility of this class is control the sequence of actual plug-in. |
| * All each plug-in developer has to do is implement onXXX() type virtual interfaces. |
| */ |
| class DrmEngineBase : public IDrmEngine { |
| public: |
| DrmEngineBase(); |
| virtual ~DrmEngineBase(); |
| |
| public: |
| DrmConstraints* getConstraints(int uniqueId, const String8* path, int action); |
| |
| DrmMetadata* getMetadata(int uniqueId, const String8* path); |
| |
| status_t initialize(int uniqueId); |
| |
| status_t setOnInfoListener(int uniqueId, const IDrmEngine::OnInfoListener* infoListener); |
| |
| status_t terminate(int uniqueId); |
| |
| bool canHandle(int uniqueId, const String8& path); |
| |
| DrmInfoStatus* processDrmInfo(int uniqueId, const DrmInfo* drmInfo); |
| |
| status_t saveRights(int uniqueId, const DrmRights& drmRights, |
| const String8& rightsPath, const String8& contentPath); |
| |
| DrmInfo* acquireDrmInfo(int uniqueId, const DrmInfoRequest* drmInfoRequest); |
| |
| String8 getOriginalMimeType(int uniqueId, const String8& path, int fd); |
| |
| int getDrmObjectType(int uniqueId, const String8& path, const String8& mimeType); |
| |
| int checkRightsStatus(int uniqueId, const String8& path, int action); |
| |
| status_t consumeRights(int uniqueId, sp<DecryptHandle>& decryptHandle, int action, |
| bool reserve); |
| |
| status_t setPlaybackStatus( |
| int uniqueId, sp<DecryptHandle>& decryptHandle, int playbackStatus, int64_t position); |
| |
| bool validateAction( |
| int uniqueId, const String8& path, int action, const ActionDescription& description); |
| |
| status_t removeRights(int uniqueId, const String8& path); |
| |
| status_t removeAllRights(int uniqueId); |
| |
| status_t openConvertSession(int uniqueId, int convertId); |
| |
| DrmConvertedStatus* convertData(int uniqueId, int convertId, const DrmBuffer* inputData); |
| |
| DrmConvertedStatus* closeConvertSession(int uniqueId, int convertId); |
| |
| DrmSupportInfo* getSupportInfo(int uniqueId); |
| |
| status_t openDecryptSession( |
| int uniqueId, sp<DecryptHandle>& decryptHandle, |
| int fd, off64_t offset, off64_t length, const char* mime); |
| |
| status_t openDecryptSession( |
| int uniqueId, sp<DecryptHandle>& decryptHandle, |
| const char* uri, const char* mime); |
| |
| status_t openDecryptSession(int uniqueId, sp<DecryptHandle>& decryptHandle, |
| const DrmBuffer& buf, const String8& mimeType); |
| |
| status_t closeDecryptSession(int uniqueId, sp<DecryptHandle>& decryptHandle); |
| |
| status_t initializeDecryptUnit(int uniqueId, sp<DecryptHandle>& decryptHandle, |
| int decryptUnitId, const DrmBuffer* headerInfo); |
| |
| status_t decrypt(int uniqueId, sp<DecryptHandle>& decryptHandle, int decryptUnitId, |
| const DrmBuffer* encBuffer, DrmBuffer** decBuffer, DrmBuffer* IV); |
| |
| status_t finalizeDecryptUnit(int uniqueId, sp<DecryptHandle>& decryptHandle, |
| int decryptUnitId); |
| |
| ssize_t pread(int uniqueId, sp<DecryptHandle>& decryptHandle, |
| void* buffer, ssize_t numBytes, off64_t offset); |
| |
| protected: |
| ///////////////////////////////////////////////////// |
| // Interface for plug-in developers // |
| // each plug-in has to implement following method // |
| ///////////////////////////////////////////////////// |
| /** |
| * Get constraint information associated with input content |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] path Path of the protected content |
| * @param[in] action Actions defined such as, |
| * Action::DEFAULT, Action::PLAY, etc |
| * @return DrmConstraints |
| * key-value pairs of constraint are embedded in it |
| * @note |
| * In case of error, return NULL |
| */ |
| virtual DrmConstraints* onGetConstraints( |
| int uniqueId, const String8* path, int action) = 0; |
| |
| /** |
| * Get metadata information associated with input content |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] path Path of the protected content |
| * @return DrmMetadata |
| * key-value pairs of metadata |
| * @note |
| * In case of error, return NULL |
| */ |
| virtual DrmMetadata* onGetMetadata(int uniqueId, const String8* path) = 0; |
| |
| /** |
| * Initialize plug-in |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onInitialize(int uniqueId) = 0; |
| |
| /** |
| * Register a callback to be invoked when the caller required to |
| * receive necessary information |
| * |
| * @param[in] uniqueId Unique identifier for a session. uniqueId is a random |
| * number generated in the DRM service. If the DrmManagerClient |
| * is created in native code, uniqueId will be a number ranged |
| * from 0x1000 to 0x1fff. If it comes from Java code, the uniqueId |
| * will be a number ranged from 0x00 to 0xfff. So bit 0x1000 in |
| * uniqueId could be used in DRM plugins to differentiate native |
| * OnInfoListener and Java OnInfoListener. |
| * @param[in] infoListener Listener |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onSetOnInfoListener( |
| int uniqueId, const IDrmEngine::OnInfoListener* infoListener) = 0; |
| |
| /** |
| * Terminate the plug-in |
| * and release resource bound to plug-in |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onTerminate(int uniqueId) = 0; |
| |
| /** |
| * Get whether the given content can be handled by this plugin or not |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] path Path the protected object |
| * @return bool |
| * Returns true if this plugin can handle , false in case of not able to handle |
| */ |
| virtual bool onCanHandle(int uniqueId, const String8& path) = 0; |
| |
| /** |
| * Executes given drm information based on its type |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] drmInfo Information needs to be processed |
| * @return DrmInfoStatus |
| * instance as a result of processing given input |
| */ |
| virtual DrmInfoStatus* onProcessDrmInfo(int uniqueId, const DrmInfo* drmInfo) = 0; |
| |
| /** |
| * Save DRM rights to specified rights path |
| * and make association with content path |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] drmRights DrmRights to be saved |
| * @param[in] rightsPath File path where rights to be saved |
| * @param[in] contentPath File path where content was saved |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onSaveRights(int uniqueId, const DrmRights& drmRights, |
| const String8& rightspath, const String8& contentPath) = 0; |
| |
| /** |
| * Retrieves necessary information for registration, unregistration or rights |
| * acquisition information. |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] drmInfoRequest Request information to retrieve drmInfo |
| * @return DrmInfo |
| * instance as a result of processing given input |
| */ |
| virtual DrmInfo* onAcquireDrmInfo(int uniqueId, const DrmInfoRequest* drmInforequest) = 0; |
| |
| /** |
| * Retrieves the mime type embedded inside the original content |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] path Path of the protected content |
| * @param[in] fd descriptor of the protected content as a file source |
| * @return String8 |
| * Returns mime-type of the original content, such as "video/mpeg" |
| */ |
| virtual String8 onGetOriginalMimeType(int uniqueId, const String8& path, int fd) = 0; |
| |
| /** |
| * Retrieves the type of the protected object (content, rights, etc..) |
| * using specified path or mimetype. At least one parameter should be non null |
| * to retrieve DRM object type |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] path Path of the content or null. |
| * @param[in] mimeType Mime type of the content or null. |
| * @return type of the DRM content, |
| * such as DrmObjectType::CONTENT, DrmObjectType::RIGHTS_OBJECT |
| */ |
| virtual int onGetDrmObjectType( |
| int uniqueId, const String8& path, const String8& mimeType) = 0; |
| |
| /** |
| * Check whether the given content has valid rights or not |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] path Path of the protected content |
| * @param[in] action Action to perform (Action::DEFAULT, Action::PLAY, etc) |
| * @return the status of the rights for the protected content, |
| * such as RightsStatus::RIGHTS_VALID, RightsStatus::RIGHTS_EXPIRED, etc. |
| */ |
| virtual int onCheckRightsStatus(int uniqueId, const String8& path, int action) = 0; |
| |
| /** |
| * Consumes the rights for a content. |
| * If the reserve parameter is true the rights is reserved until the same |
| * application calls this api again with the reserve parameter set to false. |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptHandle Handle for the decryption session |
| * @param[in] action Action to perform. (Action::DEFAULT, Action::PLAY, etc) |
| * @param[in] reserve True if the rights should be reserved. |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onConsumeRights(int uniqueId, sp<DecryptHandle>& decryptHandle, |
| int action, bool reserve) = 0; |
| |
| /** |
| * Informs the DRM Engine about the playback actions performed on the DRM files. |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptHandle Handle for the decryption session |
| * @param[in] playbackStatus Playback action (Playback::START, Playback::STOP, Playback::PAUSE) |
| * @param[in] position Position in the file (in milliseconds) where the start occurs. |
| * Only valid together with Playback::START. |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onSetPlaybackStatus( |
| int uniqueId, sp<DecryptHandle>& decryptHandle, int playbackStatus, |
| int64_t position) = 0; |
| |
| /** |
| * Validates whether an action on the DRM content is allowed or not. |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] path Path of the protected content |
| * @param[in] action Action to validate (Action::PLAY, Action::TRANSFER, etc) |
| * @param[in] description Detailed description of the action |
| * @return true if the action is allowed. |
| */ |
| virtual bool onValidateAction(int uniqueId, const String8& path, |
| int action, const ActionDescription& description) = 0; |
| |
| /** |
| * Removes the rights associated with the given protected content |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] path Path of the protected content |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onRemoveRights(int uniqueId, const String8& path) = 0; |
| |
| /** |
| * Removes all the rights information of each plug-in associated with |
| * DRM framework. Will be used in master reset |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onRemoveAllRights(int uniqueId) = 0; |
| |
| /** |
| * This API is for Forward Lock based DRM scheme. |
| * Each time the application tries to download a new DRM file |
| * which needs to be converted, then the application has to |
| * begin with calling this API. |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] convertId Handle for the convert session |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onOpenConvertSession(int uniqueId, int convertId) = 0; |
| |
| /** |
| * Accepts and converts the input data which is part of DRM file. |
| * The resultant converted data and the status is returned in the DrmConvertedInfo |
| * object. This method will be called each time there are new block |
| * of data received by the application. |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] convertId Handle for the convert session |
| * @param[in] inputData Input Data which need to be converted |
| * @return Return object contains the status of the data conversion, |
| * the output converted data and offset. In this case the |
| * application will ignore the offset information. |
| */ |
| virtual DrmConvertedStatus* onConvertData( |
| int uniqueId, int convertId, const DrmBuffer* inputData) = 0; |
| |
| /** |
| * Informs the Drm Agent when there is no more data which need to be converted |
| * or when an error occurs. Upon successful conversion of the complete data, |
| * the agent will inform that where the header and body signature |
| * should be added. This signature appending is needed to integrity |
| * protect the converted file. |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] convertId Handle for the convert session |
| * @return Return object contains the status of the data conversion, |
| * the header and body signature data. It also informs |
| * the application on which offset these signature data |
| * should be appended. |
| */ |
| virtual DrmConvertedStatus* onCloseConvertSession(int uniqueId, int convertId) = 0; |
| |
| /** |
| * Returns the information about the Drm Engine capabilities which includes |
| * supported MimeTypes and file suffixes. |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @return DrmSupportInfo |
| * instance which holds the capabilities of a plug-in |
| */ |
| virtual DrmSupportInfo* onGetSupportInfo(int uniqueId) = 0; |
| |
| /** |
| * Open the decrypt session to decrypt the given protected content |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptHandle Handle for the current decryption session |
| * @param[in] fd File descriptor of the protected content to be decrypted |
| * @param[in] offset Start position of the content |
| * @param[in] length The length of the protected content |
| * @return |
| * DRM_ERROR_CANNOT_HANDLE for failure and DRM_NO_ERROR for success |
| */ |
| virtual status_t onOpenDecryptSession( |
| int uniqueId, sp<DecryptHandle>& decryptHandle, |
| int fd, off64_t offset, off64_t length) = 0; |
| |
| /** |
| * Open the decrypt session to decrypt the given protected content |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptHandle Handle for the current decryption session |
| * @param[in] fd File descriptor of the protected content to be decrypted |
| * @param[in] offset Start position of the content |
| * @param[in] length The length of the protected content |
| * @param[in] mime Mime type of the protected content |
| * drm plugin may do some optimization since the mime type is known. |
| * @return |
| * DRM_ERROR_CANNOT_HANDLE for failure and DRM_NO_ERROR for success |
| */ |
| virtual status_t onOpenDecryptSession( |
| int /* uniqueId */, sp<DecryptHandle>& /* decryptHandle */, |
| int /* fd */, off64_t /* offset */, off64_t /* length */, |
| const char* /* mime */) { |
| |
| return DRM_ERROR_CANNOT_HANDLE; |
| } |
| |
| /** |
| * Open the decrypt session to decrypt the given protected content |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptHandle Handle for the current decryption session |
| * @param[in] uri Path of the protected content to be decrypted |
| * @return |
| * DRM_ERROR_CANNOT_HANDLE for failure and DRM_NO_ERROR for success |
| */ |
| virtual status_t onOpenDecryptSession( |
| int uniqueId, sp<DecryptHandle>& decryptHandle, |
| const char* uri) = 0; |
| |
| /** |
| * Open the decrypt session to decrypt the given protected content |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptHandle Handle for the current decryption session |
| * @param[in] uri Path of the protected content to be decrypted |
| * @param[in] mime Mime type of the protected content. The corresponding |
| * drm plugin may do some optimization since the mime type is known. |
| * @return |
| * DRM_ERROR_CANNOT_HANDLE for failure and DRM_NO_ERROR for success |
| */ |
| virtual status_t onOpenDecryptSession( |
| int /* uniqueId */, sp<DecryptHandle>& /* decryptHandle */, |
| const char* /* uri */, const char* /* mime */) { |
| |
| return DRM_ERROR_CANNOT_HANDLE; |
| } |
| |
| /** |
| * Open the decrypt session to decrypt the given protected content |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptHandle Handle for the current decryption session |
| * @param[in] buf Data to initiate decrypt session |
| * @param[in] mimeType Mime type of the protected content |
| * @return |
| * DRM_ERROR_CANNOT_HANDLE for failure and DRM_NO_ERROR for success |
| */ |
| virtual status_t onOpenDecryptSession(int /* uniqueId */, |
| sp<DecryptHandle>& /* decryptHandle */, |
| const DrmBuffer& /* buf */, |
| const String8& /* mimeType */) { |
| return DRM_ERROR_CANNOT_HANDLE; |
| } |
| |
| /** |
| * Close the decrypt session for the given handle |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptHandle Handle for the decryption session |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onCloseDecryptSession(int uniqueId, sp<DecryptHandle>& decryptHandle) = 0; |
| |
| /** |
| * Initialize decryption for the given unit of the protected content |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptId Handle for the decryption session |
| * @param[in] decryptUnitId ID Specifies decryption unit, such as track ID |
| * @param[in] headerInfo Information for initializing decryption of this decrypUnit |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onInitializeDecryptUnit(int uniqueId, sp<DecryptHandle>& decryptHandle, |
| int decryptUnitId, const DrmBuffer* headerInfo) = 0; |
| |
| /** |
| * Decrypt the protected content buffers for the given unit |
| * This method will be called any number of times, based on number of |
| * encrypted streams received from application. |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptId Handle for the decryption session |
| * @param[in] decryptUnitId ID Specifies decryption unit, such as track ID |
| * @param[in] encBuffer Encrypted data block |
| * @param[out] decBuffer Decrypted data block |
| * @param[in] IV Optional buffer |
| * @return status_t |
| * Returns the error code for this API |
| * DRM_NO_ERROR for success, and one of DRM_ERROR_UNKNOWN, DRM_ERROR_LICENSE_EXPIRED |
| * DRM_ERROR_SESSION_NOT_OPENED, DRM_ERROR_DECRYPT_UNIT_NOT_INITIALIZED, |
| * DRM_ERROR_DECRYPT for failure. |
| */ |
| virtual status_t onDecrypt(int uniqueId, sp<DecryptHandle>& decryptHandle, int decryptUnitId, |
| const DrmBuffer* encBuffer, DrmBuffer** decBuffer, DrmBuffer* IV) = 0; |
| |
| /** |
| * Finalize decryption for the given unit of the protected content |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptHandle Handle for the decryption session |
| * @param[in] decryptUnitId ID Specifies decryption unit, such as track ID |
| * @return status_t |
| * Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure |
| */ |
| virtual status_t onFinalizeDecryptUnit( |
| int uniqueId, sp<DecryptHandle>& decryptHandle, int decryptUnitId) = 0; |
| |
| /** |
| * Reads the specified number of bytes from an open DRM file. |
| * |
| * @param[in] uniqueId Unique identifier for a session |
| * @param[in] decryptHandle Handle for the decryption session |
| * @param[out] buffer Reference to the buffer that should receive the read data. |
| * @param[in] numBytes Number of bytes to read. |
| * @param[in] offset Offset with which to update the file position. |
| * |
| * @return Number of bytes read. Returns -1 for Failure. |
| */ |
| virtual ssize_t onPread(int uniqueId, sp<DecryptHandle>& decryptHandle, |
| void* buffer, ssize_t numBytes, off64_t offset) = 0; |
| }; |
| |
| }; |
| |
| #endif /* __DRM_ENGINE_BASE_H__ */ |
| |
