media/libmedia/IMediaPlayerService.cpp

/*
**
** Copyright 2008, 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 <stdint.h>
#include <sys/types.h>

#include <binder/Parcel.h>
#include <binder/IMemory.h>
#include <media/IMediaCodecList.h>
#include <media/IMediaHTTPService.h>
#include <media/IMediaPlayerService.h>
#include <media/IMediaPlayer.h>
#include <media/IMediaRecorder.h>
#include <media/IOMX.h>
#include <media/IRemoteDisplay.h>
#include <media/IRemoteDisplayClient.h>
#include <media/IStreamSource.h>

#include <utils/Errors.h>  // for status_t
#include <utils/String8.h>

namespace android {

enum {
    CREATE = IBinder::FIRST_CALL_TRANSACTION,
    CREATE_MEDIA_RECORDER,
    CREATE_METADATA_RETRIEVER,
    ADD_BATTERY_DATA,
    PULL_BATTERY_DATA,
    LISTEN_FOR_REMOTE_DISPLAY,
    GET_CODEC_LIST,
};

class BpMediaPlayerService: public BpInterface<IMediaPlayerService>
{
public:
    explicit BpMediaPlayerService(const sp<IBinder>& impl)
        : BpInterface<IMediaPlayerService>(impl)
    {
    }

    virtual sp<IMediaMetadataRetriever> createMetadataRetriever()
    {
        Parcel data, reply;
        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
        remote()->transact(CREATE_METADATA_RETRIEVER, data, &reply);
        return interface_cast<IMediaMetadataRetriever>(reply.readStrongBinder());
    }

    virtual sp<IMediaPlayer> create(
            const sp<IMediaPlayerClient>& client, audio_session_t audioSessionId,
            const std::string opPackageName) {
        Parcel data, reply;
        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
        data.writeStrongBinder(IInterface::asBinder(client));
        data.writeInt32(audioSessionId);
        data.writeCString(opPackageName.c_str());

        remote()->transact(CREATE, data, &reply);
        return interface_cast<IMediaPlayer>(reply.readStrongBinder());
    }

    virtual sp<IMediaRecorder> createMediaRecorder(const String16 &opPackageName)
    {
        Parcel data, reply;
        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
        data.writeString16(opPackageName);
        remote()->transact(CREATE_MEDIA_RECORDER, data, &reply);
        return interface_cast<IMediaRecorder>(reply.readStrongBinder());
    }

    virtual void addBatteryData(uint32_t params) {
        Parcel data, reply;
        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
        data.writeInt32(params);
        remote()->transact(ADD_BATTERY_DATA, data, &reply);
    }

    virtual status_t pullBatteryData(Parcel* reply) {
        Parcel data;
        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
        return remote()->transact(PULL_BATTERY_DATA, data, reply);
    }

    virtual sp<IRemoteDisplay> listenForRemoteDisplay(const String16 &opPackageName,
            const sp<IRemoteDisplayClient>& client, const String8& iface)
    {
        Parcel data, reply;
        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
        data.writeString16(opPackageName);
        data.writeStrongBinder(IInterface::asBinder(client));
        data.writeString8(iface);
        remote()->transact(LISTEN_FOR_REMOTE_DISPLAY, data, &reply);
        return interface_cast<IRemoteDisplay>(reply.readStrongBinder());
    }

    virtual sp<IMediaCodecList> getCodecList() const {
        Parcel data, reply;
        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
        remote()->transact(GET_CODEC_LIST, data, &reply);
        return interface_cast<IMediaCodecList>(reply.readStrongBinder());
    }
};

IMPLEMENT_META_INTERFACE(MediaPlayerService, "android.media.IMediaPlayerService");

// ----------------------------------------------------------------------

status_t BnMediaPlayerService::onTransact(
    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
    switch (code) {
        case CREATE: {
            CHECK_INTERFACE(IMediaPlayerService, data, reply);
            sp<IMediaPlayerClient> client =
                interface_cast<IMediaPlayerClient>(data.readStrongBinder());
            audio_session_t audioSessionId = (audio_session_t) data.readInt32();
            const char* opPackageName = data.readCString();
            if (opPackageName == nullptr) {
                return FAILED_TRANSACTION;
            }
            std::string opPackageNameStr(opPackageName);
            sp<IMediaPlayer> player = create(client, audioSessionId, opPackageNameStr);
            reply->writeStrongBinder(IInterface::asBinder(player));
            return NO_ERROR;
        } break;
        case CREATE_MEDIA_RECORDER: {
            CHECK_INTERFACE(IMediaPlayerService, data, reply);
            const String16 opPackageName = data.readString16();
            sp<IMediaRecorder> recorder = createMediaRecorder(opPackageName);
            reply->writeStrongBinder(IInterface::asBinder(recorder));
            return NO_ERROR;
        } break;
        case CREATE_METADATA_RETRIEVER: {
            CHECK_INTERFACE(IMediaPlayerService, data, reply);
            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever();
            reply->writeStrongBinder(IInterface::asBinder(retriever));
            return NO_ERROR;
        } break;
        case ADD_BATTERY_DATA: {
            CHECK_INTERFACE(IMediaPlayerService, data, reply);
            uint32_t params = data.readInt32();
            addBatteryData(params);
            return NO_ERROR;
        } break;
        case PULL_BATTERY_DATA: {
            CHECK_INTERFACE(IMediaPlayerService, data, reply);
            pullBatteryData(reply);
            return NO_ERROR;
        } break;
        case LISTEN_FOR_REMOTE_DISPLAY: {
            CHECK_INTERFACE(IMediaPlayerService, data, reply);
            const String16 opPackageName = data.readString16();
            sp<IRemoteDisplayClient> client(
                    interface_cast<IRemoteDisplayClient>(data.readStrongBinder()));
            if (client == NULL) {
                reply->writeStrongBinder(NULL);
                return NO_ERROR;
            }
            String8 iface(data.readString8());
            sp<IRemoteDisplay> display(listenForRemoteDisplay(opPackageName, client, iface));
            reply->writeStrongBinder(IInterface::asBinder(display));
            return NO_ERROR;
        } break;
        case GET_CODEC_LIST: {
            CHECK_INTERFACE(IMediaPlayerService, data, reply);
            sp<IMediaCodecList> mcl = getCodecList();
            reply->writeStrongBinder(IInterface::asBinder(mcl));
            return NO_ERROR;
        } break;
        default:
            return BBinder::onTransact(code, data, reply, flags);
    }
}

// ----------------------------------------------------------------------------

} // namespace android