/*
 * Copyright (C) 2018 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 ANDROID_HARDWARE_AUDIO_EFFECT_EFFECT_H
#define ANDROID_HARDWARE_AUDIO_EFFECT_EFFECT_H

#include PATH(android/hardware/audio/effect/FILE_VERSION/IEffect.h)

#include "AudioBufferManager.h"

#include <atomic>
#include <memory>
#include <vector>

#include <fmq/EventFlag.h>
#include <fmq/MessageQueue.h>
#include <hidl/MQDescriptor.h>
#include <hidl/Status.h>
#include <utils/Thread.h>

#include <hardware/audio_effect.h>

#include "VersionUtils.h"

namespace android {
namespace hardware {
namespace audio {
namespace effect {
namespace CPP_VERSION {
namespace implementation {

using ::android::sp;
using ::android::hardware::hidl_string;
using ::android::hardware::hidl_vec;
using ::android::hardware::Return;
using ::android::hardware::Void;
using ::android::hardware::audio::common::CPP_VERSION::implementation::AudioDeviceBitfield;
using namespace ::android::hardware::audio::common::CPP_VERSION;
using namespace ::android::hardware::audio::effect::CPP_VERSION;

struct Effect : public IEffect {
    typedef MessageQueue<Result, kSynchronizedReadWrite> StatusMQ;
    using GetParameterSuccessCallback =
        std::function<void(uint32_t valueSize, const void* valueData)>;

    explicit Effect(effect_handle_t handle);

    // Methods from ::android::hardware::audio::effect::CPP_VERSION::IEffect follow.
    Return<Result> init() override;
    Return<Result> setConfig(
        const EffectConfig& config, const sp<IEffectBufferProviderCallback>& inputBufferProvider,
        const sp<IEffectBufferProviderCallback>& outputBufferProvider) override;
    Return<Result> reset() override;
    Return<Result> enable() override;
    Return<Result> disable() override;
    Return<Result> setDevice(AudioDeviceBitfield device) override;
    Return<void> setAndGetVolume(const hidl_vec<uint32_t>& volumes,
                                 setAndGetVolume_cb _hidl_cb) override;
    Return<Result> volumeChangeNotification(const hidl_vec<uint32_t>& volumes) override;
    Return<Result> setAudioMode(AudioMode mode) override;
    Return<Result> setConfigReverse(
        const EffectConfig& config, const sp<IEffectBufferProviderCallback>& inputBufferProvider,
        const sp<IEffectBufferProviderCallback>& outputBufferProvider) override;
    Return<Result> setInputDevice(AudioDeviceBitfield device) override;
    Return<void> getConfig(getConfig_cb _hidl_cb) override;
    Return<void> getConfigReverse(getConfigReverse_cb _hidl_cb) override;
    Return<void> getSupportedAuxChannelsConfigs(
        uint32_t maxConfigs, getSupportedAuxChannelsConfigs_cb _hidl_cb) override;
    Return<void> getAuxChannelsConfig(getAuxChannelsConfig_cb _hidl_cb) override;
    Return<Result> setAuxChannelsConfig(const EffectAuxChannelsConfig& config) override;
    Return<Result> setAudioSource(AudioSource source) override;
    Return<Result> offload(const EffectOffloadParameter& param) override;
    Return<void> getDescriptor(getDescriptor_cb _hidl_cb) override;
    Return<void> prepareForProcessing(prepareForProcessing_cb _hidl_cb) override;
    Return<Result> setProcessBuffers(const AudioBuffer& inBuffer,
                                     const AudioBuffer& outBuffer) override;
    Return<void> command(uint32_t commandId, const hidl_vec<uint8_t>& data, uint32_t resultMaxSize,
                         command_cb _hidl_cb) override;
    Return<Result> setParameter(const hidl_vec<uint8_t>& parameter,
                                const hidl_vec<uint8_t>& value) override;
    Return<void> getParameter(const hidl_vec<uint8_t>& parameter, uint32_t valueMaxSize,
                              getParameter_cb _hidl_cb) override;
    Return<void> getSupportedConfigsForFeature(uint32_t featureId, uint32_t maxConfigs,
                                               uint32_t configSize,
                                               getSupportedConfigsForFeature_cb _hidl_cb) override;
    Return<void> getCurrentConfigForFeature(uint32_t featureId, uint32_t configSize,
                                            getCurrentConfigForFeature_cb _hidl_cb) override;
    Return<Result> setCurrentConfigForFeature(uint32_t featureId,
                                              const hidl_vec<uint8_t>& configData) override;
    Return<Result> close() override;
    Return<void> debug(const hidl_handle& fd, const hidl_vec<hidl_string>& options) override;

    // Utility methods for extending interfaces.
    template <typename T>
    Return<void> getIntegerParam(uint32_t paramId,
                                 std::function<void(Result retval, T paramValue)> cb) {
        T value;
        Result retval = getParameterImpl(sizeof(uint32_t), &paramId, sizeof(T),
                                         [&](uint32_t valueSize, const void* valueData) {
                                             if (valueSize > sizeof(T)) valueSize = sizeof(T);
                                             memcpy(&value, valueData, valueSize);
                                         });
        cb(retval, value);
        return Void();
    }

    template <typename T>
    Result getParam(uint32_t paramId, T& paramValue) {
        return getParameterImpl(sizeof(uint32_t), &paramId, sizeof(T),
                                [&](uint32_t valueSize, const void* valueData) {
                                    if (valueSize > sizeof(T)) valueSize = sizeof(T);
                                    memcpy(&paramValue, valueData, valueSize);
                                });
    }

    template <typename T>
    Result getParam(uint32_t paramId, uint32_t paramArg, T& paramValue) {
        uint32_t params[2] = {paramId, paramArg};
        return getParameterImpl(sizeof(params), params, sizeof(T),
                                [&](uint32_t valueSize, const void* valueData) {
                                    if (valueSize > sizeof(T)) valueSize = sizeof(T);
                                    memcpy(&paramValue, valueData, valueSize);
                                });
    }

    template <typename T>
    Result setParam(uint32_t paramId, const T& paramValue) {
        return setParameterImpl(sizeof(uint32_t), &paramId, sizeof(T), &paramValue);
    }

    template <typename T>
    Result setParam(uint32_t paramId, uint32_t paramArg, const T& paramValue) {
        uint32_t params[2] = {paramId, paramArg};
        return setParameterImpl(sizeof(params), params, sizeof(T), &paramValue);
    }

    Result getParameterImpl(uint32_t paramSize, const void* paramData, uint32_t valueSize,
                            GetParameterSuccessCallback onSuccess) {
        return getParameterImpl(paramSize, paramData, valueSize, valueSize, onSuccess);
    }
    Result getParameterImpl(uint32_t paramSize, const void* paramData, uint32_t requestValueSize,
                            uint32_t replyValueSize, GetParameterSuccessCallback onSuccess);
    Result setParameterImpl(uint32_t paramSize, const void* paramData, uint32_t valueSize,
                            const void* valueData);

   private:
    friend struct VirtualizerEffect;  // for getParameterImpl
    friend struct VisualizerEffect;   // to allow executing commands

    using CommandSuccessCallback = std::function<void()>;
    using GetConfigCallback = std::function<void(Result retval, const EffectConfig& config)>;
    using GetCurrentConfigSuccessCallback = std::function<void(void* configData)>;
    using GetSupportedConfigsSuccessCallback =
        std::function<void(uint32_t supportedConfigs, void* configsData)>;

    static const char* sContextResultOfCommand;
    static const char* sContextCallToCommand;
    static const char* sContextCallFunction;

    bool mIsClosed;
    effect_handle_t mHandle;
    sp<AudioBufferWrapper> mInBuffer;
    sp<AudioBufferWrapper> mOutBuffer;
    std::atomic<audio_buffer_t*> mHalInBufferPtr;
    std::atomic<audio_buffer_t*> mHalOutBufferPtr;
    std::unique_ptr<StatusMQ> mStatusMQ;
    EventFlag* mEfGroup;
    std::atomic<bool> mStopProcessThread;
    sp<Thread> mProcessThread;

    virtual ~Effect();

    template <typename T>
    static size_t alignedSizeIn(size_t s);
    template <typename T>
    std::unique_ptr<uint8_t[]> hidlVecToHal(const hidl_vec<T>& vec, uint32_t* halDataSize);
    static void effectAuxChannelsConfigFromHal(const channel_config_t& halConfig,
                                               EffectAuxChannelsConfig* config);
    static void effectAuxChannelsConfigToHal(const EffectAuxChannelsConfig& config,
                                             channel_config_t* halConfig);
    static void effectBufferConfigFromHal(const buffer_config_t& halConfig,
                                          EffectBufferConfig* config);
    static void effectBufferConfigToHal(const EffectBufferConfig& config,
                                        buffer_config_t* halConfig);
    static void effectConfigFromHal(const effect_config_t& halConfig, EffectConfig* config);
    static void effectConfigToHal(const EffectConfig& config, effect_config_t* halConfig);
    static void effectOffloadParamToHal(const EffectOffloadParameter& offload,
                                        effect_offload_param_t* halOffload);
    static std::vector<uint8_t> parameterToHal(uint32_t paramSize, const void* paramData,
                                               uint32_t valueSize, const void** valueData);

    Result analyzeCommandStatus(const char* commandName, const char* context, status_t status);
    Result analyzeStatus(const char* funcName, const char* subFuncName,
                         const char* contextDescription, status_t status);
    void getConfigImpl(int commandCode, const char* commandName, GetConfigCallback cb);
    Result getCurrentConfigImpl(uint32_t featureId, uint32_t configSize,
                                GetCurrentConfigSuccessCallback onSuccess);
    Result getSupportedConfigsImpl(uint32_t featureId, uint32_t maxConfigs, uint32_t configSize,
                                   GetSupportedConfigsSuccessCallback onSuccess);
    Result sendCommand(int commandCode, const char* commandName);
    Result sendCommand(int commandCode, const char* commandName, uint32_t size, void* data);
    Result sendCommandReturningData(int commandCode, const char* commandName, uint32_t* replySize,
                                    void* replyData);
    Result sendCommandReturningData(int commandCode, const char* commandName, uint32_t size,
                                    void* data, uint32_t* replySize, void* replyData);
    Result sendCommandReturningStatus(int commandCode, const char* commandName);
    Result sendCommandReturningStatus(int commandCode, const char* commandName, uint32_t size,
                                      void* data);
    Result sendCommandReturningStatusAndData(int commandCode, const char* commandName,
                                             uint32_t size, void* data, uint32_t* replySize,
                                             void* replyData, uint32_t minReplySize,
                                             CommandSuccessCallback onSuccess);
    Result setConfigImpl(int commandCode, const char* commandName, const EffectConfig& config,
                         const sp<IEffectBufferProviderCallback>& inputBufferProvider,
                         const sp<IEffectBufferProviderCallback>& outputBufferProvider);
};

}  // namespace implementation
}  // namespace CPP_VERSION
}  // namespace effect
}  // namespace audio
}  // namespace hardware
}  // namespace android

#endif  // ANDROID_HARDWARE_AUDIO_EFFECT_EFFECT_H