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391 lines
14 KiB
391 lines
14 KiB
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __DRM_MANAGER_CLIENT_H__
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#define __DRM_MANAGER_CLIENT_H__
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#include <utils/threads.h>
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#include <binder/IInterface.h>
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#include "drm_framework_common.h"
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namespace android {
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class DrmInfo;
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class DrmRights;
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class DrmMetadata;
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class DrmInfoEvent;
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class DrmInfoStatus;
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class DrmInfoRequest;
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class DrmSupportInfo;
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class DrmConstraints;
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class DrmConvertedStatus;
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class DrmManagerClientImpl;
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/**
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* The Native application will instantiate this class and access DRM Framework
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* services through this class.
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*
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*/
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class DrmManagerClient {
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public:
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DrmManagerClient();
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virtual ~DrmManagerClient();
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public:
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class OnInfoListener: virtual public RefBase {
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public:
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virtual ~OnInfoListener() {}
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public:
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virtual void onInfo(const DrmInfoEvent& event) = 0;
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};
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/**
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* APIs which will be used by native modules (e.g. StageFright)
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*
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*/
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public:
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/**
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* Open the decrypt session to decrypt the given protected content
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*
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* @param[in] fd File descriptor of the protected content to be decrypted
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* @param[in] offset Start position of the content
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* @param[in] length The length of the protected content
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* @param[in] mime Mime type of the protected content if it is not NULL or empty
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* @return
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* Handle for the decryption session
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*/
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sp<DecryptHandle> openDecryptSession(int fd, off64_t offset, off64_t length, const char* mime);
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/**
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* Open the decrypt session to decrypt the given protected content
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*
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* @param[in] uri Path of the protected content to be decrypted
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* @param[in] mime Mime type of the protected content if it is not NULL or empty
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* @return
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* Handle for the decryption session
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*/
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sp<DecryptHandle> openDecryptSession(const char* uri, const char* mime);
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/**
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* Open the decrypt session to decrypt the given protected content
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*
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* @param[in] buf Data to initiate decrypt session
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* @param[in] mimeType Mime type of the protected content
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* @return
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* Handle for the decryption session
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*/
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sp<DecryptHandle> openDecryptSession(const DrmBuffer& buf, const String8& mimeType);
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/**
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* Close the decrypt session for the given handle
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*
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* @param[in] decryptHandle Handle for the decryption session
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* @return status_t
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* Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure
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*/
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status_t closeDecryptSession(sp<DecryptHandle> &decryptHandle);
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/**
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* Consumes the rights for a content.
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* If the reserve parameter is true the rights is reserved until the same
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* application calls this api again with the reserve parameter set to false.
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*
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* @param[in] decryptHandle Handle for the decryption session
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* @param[in] action Action to perform. (Action::DEFAULT, Action::PLAY, etc)
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* @param[in] reserve True if the rights should be reserved.
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* @return status_t
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* Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure.
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* In case license has been expired, DRM_ERROR_LICENSE_EXPIRED will be returned.
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*/
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status_t consumeRights(sp<DecryptHandle> &decryptHandle, int action, bool reserve);
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/**
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* Informs the DRM engine about the playback actions performed on the DRM files.
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*
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* @param[in] decryptHandle Handle for the decryption session
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* @param[in] playbackStatus Playback action (Playback::START, Playback::STOP, Playback::PAUSE)
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* @param[in] position Position in the file (in milliseconds) where the start occurs.
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* Only valid together with Playback::START.
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* @return status_t
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* Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure
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*/
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status_t setPlaybackStatus(
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sp<DecryptHandle> &decryptHandle, int playbackStatus, int64_t position);
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/**
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* Initialize decryption for the given unit of the protected content
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*
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* @param[in] decryptHandle Handle for the decryption session
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* @param[in] decryptUnitId ID which specifies decryption unit, such as track ID
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* @param[in] headerInfo Information for initializing decryption of this decrypUnit
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* @return status_t
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* Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure
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*/
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status_t initializeDecryptUnit(
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sp<DecryptHandle> &decryptHandle, int decryptUnitId, const DrmBuffer* headerInfo);
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/**
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* Decrypt the protected content buffers for the given unit
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* This method will be called any number of times, based on number of
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* encrypted streams received from application.
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*
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* @param[in] decryptHandle Handle for the decryption session
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* @param[in] decryptUnitId ID which specifies decryption unit, such as track ID
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* @param[in] encBuffer Encrypted data block
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* @param[out] decBuffer Decrypted data block
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* @param[in] IV Optional buffer
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* @return status_t
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* Returns the error code for this API
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* DRM_NO_ERROR for success, and one of DRM_ERROR_UNKNOWN, DRM_ERROR_LICENSE_EXPIRED
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* DRM_ERROR_SESSION_NOT_OPENED, DRM_ERROR_DECRYPT_UNIT_NOT_INITIALIZED,
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* DRM_ERROR_DECRYPT for failure.
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*/
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status_t decrypt(
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sp<DecryptHandle> &decryptHandle, int decryptUnitId,
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const DrmBuffer* encBuffer, DrmBuffer** decBuffer, DrmBuffer* IV = NULL);
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/**
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* Finalize decryption for the given unit of the protected content
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*
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* @param[in] decryptHandle Handle for the decryption session
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* @param[in] decryptUnitId ID which specifies decryption unit, such as track ID
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* @return status_t
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* Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure
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*/
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status_t finalizeDecryptUnit(
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sp<DecryptHandle> &decryptHandle, int decryptUnitId);
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/**
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* Reads the specified number of bytes from an open DRM file.
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*
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* @param[in] decryptHandle Handle for the decryption session
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* @param[out] buffer Reference to the buffer that should receive the read data.
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* @param[in] numBytes Number of bytes to read.
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* @param[in] offset Offset with which to update the file position.
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*
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* @return Number of bytes read. Returns -1 for Failure.
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*/
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ssize_t pread(sp<DecryptHandle> &decryptHandle,
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void* buffer, ssize_t numBytes, off64_t offset);
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/**
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* Validates whether an action on the DRM content is allowed or not.
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*
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* @param[in] path Path of the protected content
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* @param[in] action Action to validate. (Action::DEFAULT, Action::PLAY, etc)
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* @param[in] description Detailed description of the action
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* @return true if the action is allowed.
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*/
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bool validateAction(const String8& path, int action, const ActionDescription& description);
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/**
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* APIs which are just the underlying implementation for the Java API
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*
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*/
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public:
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/**
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* Register a callback to be invoked when the caller required to
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* receive necessary information
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*
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* @param[in] infoListener Listener
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* @return status_t
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* Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure
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*/
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status_t setOnInfoListener(const sp<DrmManagerClient::OnInfoListener>& infoListener);
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/**
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* Get constraint information associated with input content
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*
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* @param[in] path Path of the protected content
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* @param[in] action Actions defined such as,
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* Action::DEFAULT, Action::PLAY, etc
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* @return DrmConstraints
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* key-value pairs of constraint are embedded in it
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* @note
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* In case of error, return NULL
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*/
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DrmConstraints* getConstraints(const String8* path, const int action);
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/**
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* Get metadata information associated with input content
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*
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* @param[in] path Path of the protected content
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* @return DrmMetadata
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* key-value pairs of metadata
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* @note
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* In case of error, return NULL
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*/
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DrmMetadata* getMetadata(const String8* path);
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/**
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* Check whether the given mimetype or path can be handled
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*
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* @param[in] path Path of the content needs to be handled
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* @param[in] mimetype Mimetype of the content needs to be handled
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* @return
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* True if DrmManager can handle given path or mime type.
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*/
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bool canHandle(const String8& path, const String8& mimeType);
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/**
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* Executes given drm information based on its type
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*
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* @param[in] drmInfo Information needs to be processed
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* @return DrmInfoStatus
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* instance as a result of processing given input
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*/
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DrmInfoStatus* processDrmInfo(const DrmInfo* drmInfo);
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/**
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* Retrieves necessary information for registration, unregistration or rights
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* acquisition information.
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*
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* @param[in] drmInfoRequest Request information to retrieve drmInfo
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* @return DrmInfo
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* instance as a result of processing given input
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*/
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DrmInfo* acquireDrmInfo(const DrmInfoRequest* drmInfoRequest);
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/**
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* Save DRM rights to specified rights path
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* and make association with content path
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*
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* @param[in] drmRights DrmRights to be saved
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* @param[in] rightsPath File path where rights to be saved
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* @param[in] contentPath File path where content was saved
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* @return status_t
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* Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure
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*/
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status_t saveRights(
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const DrmRights& drmRights, const String8& rightsPath, const String8& contentPath);
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/**
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* Retrieves the mime type embedded inside the original content
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*
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* @param[in] path the path of the protected content
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* @param[in] fd the file descriptor of the protected content
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* @return String8
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* Returns mime-type of the original content, such as "video/mpeg"
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*/
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String8 getOriginalMimeType(const String8& path, int fd);
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/**
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* Retrieves the type of the protected object (content, rights, etc..)
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* by using specified path or mimetype. At least one parameter should be non null
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* to retrieve DRM object type
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*
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* @param[in] path Path of the content or null.
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* @param[in] mimeType Mime type of the content or null.
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* @return type of the DRM content,
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* such as DrmObjectType::CONTENT, DrmObjectType::RIGHTS_OBJECT
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*/
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int getDrmObjectType(const String8& path, const String8& mimeType);
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/**
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* Check whether the given content has valid rights or not
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*
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* @param[in] path Path of the protected content
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* @param[in] action Action to perform
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* @return the status of the rights for the protected content,
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* such as RightsStatus::RIGHTS_VALID, RightsStatus::RIGHTS_EXPIRED, etc.
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*/
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int checkRightsStatus(const String8& path, int action);
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/**
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* Removes the rights associated with the given protected content
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*
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* @param[in] path Path of the protected content
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* @return status_t
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* Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure
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*/
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status_t removeRights(const String8& path);
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/**
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* Removes all the rights information of each plug-in associated with
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* DRM framework.
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*
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* @return status_t
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* Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure
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*/
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status_t removeAllRights();
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/**
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* This API is for Forward Lock DRM.
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* Each time the application tries to download a new DRM file
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* which needs to be converted, then the application has to
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* begin with calling this API.
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*
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* @param[in] convertId Handle for the convert session
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* @param[in] mimeType Description/MIME type of the input data packet
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* @return Return handle for the convert session
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*/
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int openConvertSession(const String8& mimeType);
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/**
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* Passes the input data which need to be converted. The resultant
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* converted data and the status is returned in the DrmConvertedInfo
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* object. This method will be called each time there are new block
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* of data received by the application.
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*
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* @param[in] convertId Handle for the convert session
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* @param[in] inputData Input Data which need to be converted
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* @return Return object contains the status of the data conversion,
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* the output converted data and offset. In this case the
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* application will ignore the offset information.
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*/
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DrmConvertedStatus* convertData(int convertId, const DrmBuffer* inputData);
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/**
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* When there is no more data which need to be converted or when an
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* error occurs that time the application has to inform the Drm agent
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* via this API. Upon successful conversion of the complete data,
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* the agent will inform that where the header and body signature
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* should be added. This signature appending is needed to integrity
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* protect the converted file.
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*
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* @param[in] convertId Handle for the convert session
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* @return Return object contains the status of the data conversion,
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* the header and body signature data. It also informs
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* the application on which offset these signature data
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* should be appended.
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*/
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DrmConvertedStatus* closeConvertSession(int convertId);
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/**
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* Retrieves all DrmSupportInfo instance that native DRM framework can handle.
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* This interface is meant to be used by JNI layer
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*
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* @param[out] length Number of elements in drmSupportInfoArray
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* @param[out] drmSupportInfoArray Array contains all DrmSupportInfo
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* that native DRM framework can handle
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* @return status_t
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* Returns DRM_NO_ERROR for success, DRM_ERROR_UNKNOWN for failure
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*/
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status_t getAllSupportInfo(int* length, DrmSupportInfo** drmSupportInfoArray);
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private:
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int mUniqueId;
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sp<DrmManagerClientImpl> mDrmManagerClientImpl;
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};
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};
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#endif /* __DRM_MANAGER_CLIENT_H__ */
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