media/libaudioclient/IAudioPolicyServiceClient.cpp

/*
 * Copyright (C) 2009 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.
 */

#define LOG_TAG "IAudioPolicyServiceClient"
#include <utils/Log.h>

#include <stdint.h>
#include <sys/types.h>

#include <binder/Parcel.h>

#include <media/IAudioPolicyServiceClient.h>
#include <media/AudioSystem.h>

namespace android {

enum {
    PORT_LIST_UPDATE = IBinder::FIRST_CALL_TRANSACTION,
    PATCH_LIST_UPDATE,
    MIX_STATE_UPDATE,
    RECORDING_CONFIGURATION_UPDATE,
    VOLUME_GROUP_CHANGED,
};

// ----------------------------------------------------------------------
inline void readAudioConfigBaseFromParcel(const Parcel& data, audio_config_base_t *config) {
    config->sample_rate = data.readUint32();
    config->channel_mask = (audio_channel_mask_t) data.readInt32();
    config->format = (audio_format_t) data.readInt32();
}

inline void writeAudioConfigBaseToParcel(Parcel& data, const audio_config_base_t *config)
{
    data.writeUint32(config->sample_rate);
    data.writeInt32((int32_t) config->channel_mask);
    data.writeInt32((int32_t) config->format);
}

inline void readRecordClientInfoFromParcel(const Parcel& data, record_client_info_t *clientInfo) {
    clientInfo->uid = (uid_t) data.readUint32();
    clientInfo->session = (audio_session_t) data.readInt32();
    clientInfo->source = (audio_source_t) data.readInt32();
    data.read(&clientInfo->port_id, sizeof(audio_port_handle_t));
    clientInfo->silenced = data.readBool();
}

inline void writeRecordClientInfoToParcel(Parcel& data, const record_client_info_t *clientInfo) {
    data.writeUint32((uint32_t) clientInfo->uid);
    data.writeInt32((int32_t) clientInfo->session);
    data.writeInt32((int32_t) clientInfo->source);
    data.write(&clientInfo->port_id, sizeof(audio_port_handle_t));
    data.writeBool(clientInfo->silenced);
}

inline void readEffectVectorFromParcel(const Parcel& data,
                                       std::vector<effect_descriptor_t> *effects) {
    int32_t numEffects = data.readInt32();
    for (int32_t i = 0; i < numEffects; i++) {
        effect_descriptor_t effect;
        if (data.read(&effect, sizeof(effect_descriptor_t)) != NO_ERROR) {
            break;
        }
        (*effects).push_back(effect);
    }
}

inline void writeEffectVectorToParcel(Parcel& data, std::vector<effect_descriptor_t> effects) {
    data.writeUint32((uint32_t) effects.size());
    for (const auto& effect : effects) {
        if (data.write(&effect, sizeof(effect_descriptor_t)) != NO_ERROR) {
            break;
        }
    }
}

// ----------------------------------------------------------------------
class BpAudioPolicyServiceClient : public BpInterface<IAudioPolicyServiceClient>
{
public:
    explicit BpAudioPolicyServiceClient(const sp<IBinder>& impl)
        : BpInterface<IAudioPolicyServiceClient>(impl)
    {
    }

    void onAudioPortListUpdate()
    {
        Parcel data, reply;
        data.writeInterfaceToken(IAudioPolicyServiceClient::getInterfaceDescriptor());
        remote()->transact(PORT_LIST_UPDATE, data, &reply, IBinder::FLAG_ONEWAY);
    }

    void onAudioPatchListUpdate()
    {
        Parcel data, reply;
        data.writeInterfaceToken(IAudioPolicyServiceClient::getInterfaceDescriptor());
        remote()->transact(PATCH_LIST_UPDATE, data, &reply, IBinder::FLAG_ONEWAY);
    }

    void onAudioVolumeGroupChanged(volume_group_t group, int flags)
    {
        Parcel data, reply;
        data.writeInterfaceToken(IAudioPolicyServiceClient::getInterfaceDescriptor());
        data.writeUint32(group);
        data.writeInt32(flags);
        remote()->transact(VOLUME_GROUP_CHANGED, data, &reply, IBinder::FLAG_ONEWAY);
    }

    void onDynamicPolicyMixStateUpdate(String8 regId, int32_t state)
    {
        Parcel data, reply;
        data.writeInterfaceToken(IAudioPolicyServiceClient::getInterfaceDescriptor());
        data.writeString8(regId);
        data.writeInt32(state);
        remote()->transact(MIX_STATE_UPDATE, data, &reply, IBinder::FLAG_ONEWAY);
    }

    void onRecordingConfigurationUpdate(int event,
                                        const record_client_info_t *clientInfo,
                                        const audio_config_base_t *clientConfig,
                                        std::vector<effect_descriptor_t> clientEffects,
                                        const audio_config_base_t *deviceConfig,
                                        std::vector<effect_descriptor_t> effects,
                                        audio_patch_handle_t patchHandle,
                                        audio_source_t source) {
        Parcel data, reply;
        data.writeInterfaceToken(IAudioPolicyServiceClient::getInterfaceDescriptor());
        data.writeInt32(event);
        writeRecordClientInfoToParcel(data, clientInfo);
        writeAudioConfigBaseToParcel(data, clientConfig);
        writeEffectVectorToParcel(data, clientEffects);
        writeAudioConfigBaseToParcel(data, deviceConfig);
        writeEffectVectorToParcel(data, effects);
        data.writeInt32(patchHandle);
        data.writeInt32((int32_t) source);
        remote()->transact(RECORDING_CONFIGURATION_UPDATE, data, &reply, IBinder::FLAG_ONEWAY);
    }
};

IMPLEMENT_META_INTERFACE(AudioPolicyServiceClient, "android.media.IAudioPolicyServiceClient");

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

status_t BnAudioPolicyServiceClient::onTransact(
    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
    switch (code) {
    case PORT_LIST_UPDATE: {
            CHECK_INTERFACE(IAudioPolicyServiceClient, data, reply);
            onAudioPortListUpdate();
            return NO_ERROR;
        } break;
    case PATCH_LIST_UPDATE: {
            CHECK_INTERFACE(IAudioPolicyServiceClient, data, reply);
            onAudioPatchListUpdate();
            return NO_ERROR;
        } break;
    case VOLUME_GROUP_CHANGED: {
            CHECK_INTERFACE(IAudioPolicyServiceClient, data, reply);
            volume_group_t group = static_cast<volume_group_t>(data.readUint32());
            int flags = data.readInt32();
            onAudioVolumeGroupChanged(group, flags);
            return NO_ERROR;
        } break;
    case MIX_STATE_UPDATE: {
            CHECK_INTERFACE(IAudioPolicyServiceClient, data, reply);
            String8 regId = data.readString8();
            int32_t state = data.readInt32();
            onDynamicPolicyMixStateUpdate(regId, state);
            return NO_ERROR;
        } break;
    case RECORDING_CONFIGURATION_UPDATE: {
            CHECK_INTERFACE(IAudioPolicyServiceClient, data, reply);
            int event = (int) data.readInt32();
            record_client_info_t clientInfo;
            audio_config_base_t clientConfig;
            audio_config_base_t deviceConfig;
            readRecordClientInfoFromParcel(data, &clientInfo);
            readAudioConfigBaseFromParcel(data, &clientConfig);
            std::vector<effect_descriptor_t> clientEffects;
            readEffectVectorFromParcel(data, &clientEffects);
            readAudioConfigBaseFromParcel(data, &deviceConfig);
            std::vector<effect_descriptor_t> effects;
            readEffectVectorFromParcel(data, &effects);
            audio_patch_handle_t patchHandle = (audio_patch_handle_t) data.readInt32();
            audio_source_t source = (audio_source_t) data.readInt32();
            onRecordingConfigurationUpdate(event, &clientInfo, &clientConfig, clientEffects,
                                           &deviceConfig, effects, patchHandle, source);
            return NO_ERROR;
        } break;
    default:
        return BBinder::onTransact(code, data, reply, flags);
    }
}

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

} // namespace android