include/media/IHDCP.h

/*
 * Copyright (C) 2012 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.
 */

#include <binder/IInterface.h>
#include <media/hardware/HDCPAPI.h>
#include <media/stagefright/foundation/ABase.h>
#include <ui/GraphicBuffer.h>

namespace android {

struct IHDCPObserver : public IInterface {
    DECLARE_META_INTERFACE(HDCPObserver);

    virtual void notify(
            int msg, int ext1, int ext2, const Parcel *obj) = 0;

private:
    DISALLOW_EVIL_CONSTRUCTORS(IHDCPObserver);
};

struct IHDCP : public IInterface {
    DECLARE_META_INTERFACE(HDCP);

    // Called to specify the observer that receives asynchronous notifications
    // from the HDCP implementation to signal completion/failure of asynchronous
    // operations (such as initialization) or out of band events.
    virtual status_t setObserver(const sp<IHDCPObserver> &observer) = 0;

    // Request to setup an HDCP session with the specified host listening
    // on the specified port.
    virtual status_t initAsync(const char *host, unsigned port) = 0;

    // Request to shutdown the active HDCP session.
    virtual status_t shutdownAsync() = 0;

    // Returns the capability bitmask of this HDCP session.
    // Possible return values (please refer to HDCAPAPI.h):
    //   HDCP_CAPS_ENCRYPT: mandatory, meaning the HDCP module can encrypt
    //   from an input byte-array buffer to an output byte-array buffer
    //   HDCP_CAPS_ENCRYPT_NATIVE: the HDCP module supports encryption from
    //   a native buffer to an output byte-array buffer. The format of the
    //   input native buffer is specific to vendor's encoder implementation.
    //   It is the same format as that used by the encoder when
    //   "storeMetaDataInBuffers" extension is enabled on its output port.
    virtual uint32_t getCaps() = 0;

    // ENCRYPTION only:
    // Encrypt data according to the HDCP spec. "size" bytes of data are
    // available at "inData" (virtual address), "size" may not be a multiple
    // of 128 bits (16 bytes). An equal number of encrypted bytes should be
    // written to the buffer at "outData" (virtual address).
    // This operation is to be synchronous, i.e. this call does not return
    // until outData contains size bytes of encrypted data.
    // streamCTR will be assigned by the caller (to 0 for the first PES stream,
    // 1 for the second and so on)
    // inputCTR _will_be_maintained_by_the_callee_ for each PES stream.
    virtual status_t encrypt(
            const void *inData, size_t size, uint32_t streamCTR,
            uint64_t *outInputCTR, void *outData) = 0;

    // Encrypt data according to the HDCP spec. "size" bytes of data starting
    // at location "offset" are available in "buffer" (buffer handle). "size"
    // may not be a multiple of 128 bits (16 bytes). An equal number of
    // encrypted bytes should be written to the buffer at "outData" (virtual
    // address). This operation is to be synchronous, i.e. this call does not
    // return until outData contains size bytes of encrypted data.
    // streamCTR will be assigned by the caller (to 0 for the first PES stream,
    // 1 for the second and so on)
    // inputCTR _will_be_maintained_by_the_callee_ for each PES stream.
    virtual status_t encryptNative(
            const sp<GraphicBuffer> &graphicBuffer,
            size_t offset, size_t size, uint32_t streamCTR,
            uint64_t *outInputCTR, void *outData) = 0;

    // DECRYPTION only:
    // Decrypt data according to the HDCP spec.
    // "size" bytes of encrypted data are available at "inData"
    // (virtual address), "size" may not be a multiple of 128 bits (16 bytes).
    // An equal number of decrypted bytes should be written to the buffer
    // at "outData" (virtual address).
    // This operation is to be synchronous, i.e. this call does not return
    // until outData contains size bytes of decrypted data.
    // Both streamCTR and inputCTR will be provided by the caller.
    virtual status_t decrypt(
            const void *inData, size_t size,
            uint32_t streamCTR, uint64_t inputCTR,
            void *outData) = 0;

private:
    DISALLOW_EVIL_CONSTRUCTORS(IHDCP);
};

struct BnHDCPObserver : public BnInterface<IHDCPObserver> {
    virtual status_t onTransact(
            uint32_t code, const Parcel &data, Parcel *reply,
            uint32_t flags = 0);
};

struct BnHDCP : public BnInterface<IHDCP> {
    virtual status_t onTransact(
            uint32_t code, const Parcel &data, Parcel *reply,
            uint32_t flags = 0);
};

}  // namespace android