distributedhardware/distributedaudiotest/distributedaudiotest.cpp

/*
 * Copyright (c) 2023-2024 Huawei Device Co., Ltd.
 * 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 <cstdio>
#include <cstring>
#include <cstdlib>
#include <unistd.h>
#include <cerrno>
#include <fcntl.h>
#include <csignal>
#include <sys/stat.h>

#include <iostream>
#include <string>

#include <securec.h>
#include "unistd.h"
#include "distributedaudiotest.h"

using namespace OHOS::DistributedHardware;

using OHOS::HDI::DistributedAudio::Audio::V1_0::IAudioAdapter;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioAdapterDescriptor;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioFormat;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioPort;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioPortDirection;
using OHOS::HDI::DistributedAudio::Audio::V1_0::IAudioManager;
using OHOS::HDI::DistributedAudio::Audio::V1_0::IAudioRender;
using OHOS::HDI::DistributedAudio::Audio::V1_0::IAudioCapture;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioSampleAttributes;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioDeviceDescriptor;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioCategory;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioRouteNode;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioExtParamKey;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioRoute;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioSceneDescriptor;
using OHOS::HDI::DistributedAudio::Audio::V1_0::IAudioCallback;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioPortPin;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioPortType;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioPortRole;
using OHOS::HDI::DistributedAudio::Audio::V1_0::AudioCallbackType;
int32_t g_volume = 5;
static int32_t ParamEventCallback(AudioExtParamKey key, const char *condition, const char *value, void *reserved,
    void *cookie);
class AudioParamCallbackImpl final : public IAudioCallback {
public:
    AudioParamCallbackImpl() {}
    ~AudioParamCallbackImpl() override {}
    int32_t RenderCallback(AudioCallbackType type, int8_t &reserved, int8_t &cookie) override;
    int32_t ParamCallback(AudioExtParamKey key, const std::string &condition, const std::string &value,
        int8_t &reserved, int8_t cookie) override;
};

int32_t AudioParamCallbackImpl::RenderCallback(AudioCallbackType type, int8_t &reserved, int8_t &cookie)
{
    (void) type;
    (void) reserved;
    (void) cookie;
    return DH_SUCCESS;
}

int32_t AudioParamCallbackImpl::ParamCallback(AudioExtParamKey key, const std::string &condition,
    const std::string &value, int8_t &reserved, int8_t cookie)
{
    (void) cookie;
    void *cookies = nullptr;
    ParamEventCallback(static_cast<::AudioExtParamKey>(key), condition.c_str(),
        value.c_str(), static_cast<void *>(&reserved), cookies);
    return DH_SUCCESS;
}

const int32_t CMD_FIND = 9;
const int32_t CMD_OPEN_SPK = 1;
const int32_t CMD_CLOSE_SPK = 2;
const int32_t CMD_START_SPK = 3;
const int32_t CMD_STOP_SPK = 4;
const int32_t CMD_OPEN_MIC = 5;
const int32_t CMD_CLOSE_MIC = 6;
const int32_t CMD_START_MIC = 7;
const int32_t CMD_STOP_MIC = 8;
const int32_t CMD_SET_VOL = 11;
const int32_t CMD_GET_VOL = 12;

const char DEV_TYPE_SPK = '1';
const char DEV_TYPE_MIC = '2';
const char SPK_FILE_PATH[128] = "/data/test.wav";
const char MIC_FILE_PATH[128] = "/data/mic.pcm";
constexpr int32_t TYPE_OFFSET = 12;
constexpr int32_t AUDIO_SAMPLE_RATE = 48000;
constexpr int32_t VOLUME_MIN = 0;
constexpr int32_t VOLUME_MAX = 15;
constexpr int32_t RENDER_FRAME_SIZE = 3840;
constexpr int32_t RENDER_INTER_LEAVED = 1;
constexpr int32_t RENDER_STREAM_ID = 0;
constexpr int32_t RENDER_CHANNEL_MASK = 2;
constexpr int32_t CAPTURE_INTER_LEAVED = 1;
constexpr int32_t CAPTURE_STREAM_ID = 2;
constexpr int32_t CAPTURE_CHANNEL_MASK = 2;
constexpr int64_t AUDIO_FRAME_TIME_INTERFAL_DEFAULT = 21333;

static OHOS::sptr<IAudioManager> g_manager = nullptr;
static OHOS::sptr<IAudioAdapter> g_adapter = nullptr;
static OHOS::sptr<IAudioRender> g_render = nullptr;
static OHOS::sptr<IAudioCapture> g_capture = nullptr;
static std::vector<AudioAdapterDescriptor> g_devices;
static OHOS::sptr<IAudioCallback> g_callbackStub = nullptr;
static std::string g_devId = "";

static constexpr const char* PLAY_THREAD = "playThread";
static constexpr const char* CAPTURE_THREAD = "captureThread";

uint32_t g_renderId = 0;
uint32_t g_captureId = 0;
int32_t g_frameNum = 0;
int32_t g_frameIndex = 0;
int32_t g_micFrameNum = 0;
bool g_isInitRenderData = false;
static std::vector<uint8_t*> renderData;

static DeviceStatus g_spkStatus = DeviceStatus::DEVICE_IDLE;
static DeviceStatus g_micStatus = DeviceStatus::DEVICE_IDLE;

static std::thread g_playingThread;
static std::thread g_capingThread;
FILE *g_micFile = nullptr;

static int64_t GetNowTimeUs()
{
    std::chrono::microseconds nowUs =
        std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::system_clock::now().time_since_epoch());
    return nowUs.count();
}

int32_t InitTestDemo()
{
    std::cout << "**********************************************************************************" << std::endl;
    DHLOGI("**********************************************************************************");
    std::cout << "Distributed Audio Test Demo Bin v1.3." << std::endl;
    std::cout << "**********************************************************************************" << std::endl;
    std::cout << std::endl;
    std::cout << "Init distributed audio hdf service." << std::endl;
    g_manager = IAudioManager::Get("daudio_primary_service", false);
    if (g_manager == nullptr) {
        std::cout << "Distributed audio manager is null, Please Check network!" << std::endl;
        return ERR_DH_AUDIO_FAILED;
    }
    std::cout << "Load audio manager success." << std::endl;
    FindAudioDevice();
    if (g_devId.empty()) {
        std::cout << "Cannot find distributed device. Please input 9 to query distribtued device." << std::endl;
    } else {
        std::cout << "Find one distributed device: " << g_devId << std::endl;
    }
    return DH_SUCCESS;
}

std::string FindAudioDevice()
{
    if (g_manager == nullptr) {
        std::cout << "Audio manager is null, Please Check network!" << std::endl;
        return "false";
    }
    int32_t ret = g_manager->GetAllAdapters(g_devices);
    if (ret != DH_SUCCESS) {
        std::cout << "Get audio devices failed!" << std::endl;
        return "false";
    }
    for (uint32_t index = 0; index < g_devices.size(); index++) {
        const AudioAdapterDescriptor desc = g_devices[index];
        if (index == 0) {
            g_devId = desc.adapterName;
            break;
        }
    }
    return "true";
}

static void HandleDevError(const char *condition, const char *value)
{
    if (condition[TYPE_OFFSET] == DEV_TYPE_SPK && g_spkStatus != DeviceStatus::DEVICE_IDLE) {
        CloseSpk();
    }

    if (condition[TYPE_OFFSET] == DEV_TYPE_MIC && g_micStatus == DeviceStatus::DEVICE_IDLE) {
        CloseMic();
    }

    std::cout << "Receive abnormal event, Demo quit." << std::endl;
}

static int32_t ParamEventCallback(AudioExtParamKey key, const char *condition, const char *value, void *reserved,
    void *cookie)
{
    std::string val(value);
    std::string con(condition);
    std::cout << std::endl;
    std::cout << "**********************************************************************************" << std::endl;
    std::cout << "Event recived: " << key << std::endl;
    std::cout << "Condition: " << con << std::endl;
    std::cout << "Value: " << val << std::endl;
    std::cout << "**********************************************************************************" << std::endl;
    std::cout << std::endl;

    if (key == AudioExtParamKey::AUDIO_EXT_PARAM_KEY_STATUS && con.rfind("ERR_EVENT", 0) == 0) {
        HandleDevError(condition, value);
    }
    return DH_SUCCESS;
}

static int32_t LoadSpkDev(const std::string &devId)
{
    struct AudioAdapterDescriptor dev;
    for (uint32_t index = 0; index < g_devices.size(); index++) {
        struct AudioAdapterDescriptor desc = g_devices[index];
        if (desc.adapterName == devId) {
            dev = desc;
            break;
        }
    }
    if (dev.adapterName.data() == nullptr) {
        std::cout << "Input device id is wrong." << std::endl;
        FindAudioDevice();
        return ERR_DH_AUDIO_FAILED;
    }
    if (g_manager == nullptr) {
        return ERR_DH_AUDIO_FAILED;
    }
    if (g_adapter == nullptr) {
        int32_t ret = g_manager->LoadAdapter(dev, g_adapter);
        if (ret != DH_SUCCESS || g_adapter == nullptr) {
            std::cout << "Load audio device failed, ret: " << ret << std::endl;
            return ERR_DH_AUDIO_FAILED;
        }
    }
    return DH_SUCCESS;
}

std::string OpenSpk(std::string devId)
{
    if (g_spkStatus != DeviceStatus::DEVICE_IDLE) {
        std::cout << "Speaker device is already opened." << std::endl;
        return "true";
    }
    if (LoadSpkDev(devId) != DH_SUCCESS) {
        std::cout << "Load spk failed" << std::endl;
        return "false";
    }

    g_callbackStub = new AudioParamCallbackImpl();
    int32_t ret = g_adapter->RegExtraParamObserver(g_callbackStub, 0);
    if (ret != DH_SUCCESS) {
        std::cout << "Register observer failed, ret: " << ret << std::endl;
        return "false";
    }

    struct AudioDeviceDescriptor renderDesc;
    renderDesc.pins = AudioPortPin::PIN_OUT_SPEAKER;
    renderDesc.desc = "";
    AudioSampleAttributes g_rattrs = {};
    g_rattrs.type = AudioCategory::AUDIO_IN_MEDIA;
    g_rattrs.interleaved = RENDER_INTER_LEAVED;
    g_rattrs.streamId = RENDER_STREAM_ID;
    g_rattrs.channelCount = RENDER_CHANNEL_MASK;
    g_rattrs.sampleRate = AUDIO_SAMPLE_RATE;
    g_rattrs.format = AudioFormat::AUDIO_FORMAT_TYPE_PCM_16_BIT;
    ret = g_adapter->CreateRender(renderDesc, g_rattrs, g_render, g_renderId);
    if (ret != DH_SUCCESS || g_render == nullptr) {
        std::cout << "Open SPK device failed, ret: " << ret << std::endl;
        return "false";
    }
    g_spkStatus = DeviceStatus::DEVICE_OPEN;
    std::cout << "Open SPK device success." << std::endl;
    return "true";
}

static void WriteStreamWait(const int64_t &startTime)
{
    int64_t endTime = GetNowTimeUs();
    int64_t passTime = endTime - startTime;

    if (passTime > AUDIO_FRAME_TIME_INTERFAL_DEFAULT) {
        return;
    }
    int64_t remainTime = AUDIO_FRAME_TIME_INTERFAL_DEFAULT - passTime;
    std::this_thread::sleep_for(std::chrono::microseconds(remainTime));
}

static void Play()
{
    if (g_render == nullptr) {
        std::cout << "SPK device is null." << std::endl;
        return;
    }
    if (pthread_setname_np(pthread_self(), PLAY_THREAD) != DH_SUCCESS) {
        std::cout << "Play thread setname failed." << std::endl;
    }
    std::cout << "Playing thread started." << std::endl;
    g_render->Start();
    g_spkStatus = DeviceStatus::DEVICE_START;

    uint64_t size = 0;
    while (g_spkStatus == DeviceStatus::DEVICE_START) {
        int64_t startTime = GetNowTimeUs();

        std::vector<int8_t> frameHal(RENDER_FRAME_SIZE);
        int32_t ret = memcpy_s(frameHal.data(), RENDER_FRAME_SIZE, renderData[g_frameIndex], RENDER_FRAME_SIZE);
        if (ret != EOK) {
            DHLOGE("Copy render frame failed, error code %{public}d.", ret);
            return;
        }
        ret = g_render->RenderFrame(frameHal, size);
        if (ret != DH_SUCCESS) {
            std::cout<<"RenderFrame failed, index: "<< g_frameIndex << ", ret:  " << ret << std::endl;
        }
        g_frameIndex++;
        if (g_frameNum != 0 && g_frameIndex == g_frameNum) {
            g_frameIndex = 0;
        }
        WriteStreamWait(startTime);
    }
    std::cout << "Playing thread stopped." << std::endl;
}

std::string StartRender()
{
    if (g_spkStatus == DeviceStatus::DEVICE_IDLE) {
        std::cout << "Speaker device is not opened, start render failed." << std::endl;
        return "false";
    }

    if (g_spkStatus == DeviceStatus::DEVICE_OPEN) {
        WavHdr wavHeader;
        size_t headerSize = sizeof(WavHdr);
        if (!g_isInitRenderData) {
            struct stat statbuf;
            stat(SPK_FILE_PATH, &statbuf);
            int32_t size = statbuf.st_size;
            g_frameNum = (size - static_cast<int32_t>(headerSize)) / RENDER_FRAME_SIZE;
            std::cout << "Audio file frame num: " << g_frameNum << std::endl;
            for (int32_t j = 0; j < g_frameNum; j++) {
                uint8_t *frame = new uint8_t[RENDER_FRAME_SIZE]();
                renderData.push_back(frame);
            }
            g_isInitRenderData = true;
        }
        FILE *wavFile = fopen(SPK_FILE_PATH, "rb");

        if (wavFile == nullptr) {
            DHLOGE("open spk file path failed!");
            std::cout << "open spk file path failed!" << std::endl;
            return "false";
        }

        fread(&wavHeader, 1, headerSize, wavFile);
        for (int32_t i = 0; i < g_frameNum; i++) {
            fread(renderData[i], 1, RENDER_FRAME_SIZE, wavFile);
        }
        fclose(wavFile);
        g_frameIndex = 0;
        g_playingThread = std::thread(Play);
        return "true";
    }
    if (g_spkStatus == DeviceStatus::DEVICE_START) {
        std::cout << "Speaker device is started." << std::endl;
        return "true";
    }
    if (g_spkStatus == DeviceStatus::DEVICE_STOP) {
        g_playingThread = std::thread(Play);
    }
    return "true";
}

std::string StopRender()
{
    if (g_render == nullptr) {
        std::cout << "SPK device is null." << std::endl;
        return "false";
    }

    if (g_spkStatus == DeviceStatus::DEVICE_IDLE) {
        std::cout << "Speaker device is not opened." << std::endl;
        return "false";
    }

    if (g_spkStatus == DeviceStatus::DEVICE_OPEN) {
        std::cout << "Speaker device is not started." << std::endl;
        return "false";
    }

    if (g_spkStatus == DeviceStatus::DEVICE_STOP) {
        std::cout << "Speaker device is already stoped." << std::endl;
        return "true";
    }

    g_spkStatus = DeviceStatus::DEVICE_STOP;
    if (g_playingThread.joinable()) {
        g_playingThread.join();
    }
    g_render->Stop();
    return "true";
}

std::string CloseSpk()
{
    if (g_spkStatus == DeviceStatus::DEVICE_IDLE) {
        std::cout << "Speaker device is not opened." << std::endl;
        return "false";
    }

    if (g_spkStatus == DeviceStatus::DEVICE_START) {
        StopRender();
    }

    int32_t ret = g_adapter->DestroyRender(g_renderId);
    if (ret != DH_SUCCESS) {
        std::cout << "Close speaker failed" << std::endl;
        return "false";
    }
    if (g_micStatus == DeviceStatus::DEVICE_IDLE) {
        g_manager->UnloadAdapter(g_devId);
        g_adapter = nullptr;
    }
    g_spkStatus = DeviceStatus::DEVICE_IDLE;

    if (g_isInitRenderData) {
        for (auto &p : renderData) {
            delete[] p;
        }
        renderData.clear();
        g_isInitRenderData = false;
    }
    std::cout << "Close SPK device success." << std::endl;
    return "true";
}

static int32_t LoadMicDev(const std::string &devId)
{
    struct AudioAdapterDescriptor dev;
    for (uint32_t index = 0; index < g_devices.size(); index++) {
        struct AudioAdapterDescriptor desc = g_devices[index];
        if (desc.adapterName == devId) {
            dev = desc;
            break;
        }
    }
    if (dev.adapterName.data() == nullptr) {
        std::cout << "Input device id is wrong." << std::endl;
        FindAudioDevice();
        return ERR_DH_AUDIO_FAILED;
    }
    if (g_manager == nullptr) {
        return ERR_DH_AUDIO_FAILED;
    }
    if (g_adapter == nullptr) {
        int32_t ret = g_manager->LoadAdapter(dev, g_adapter);
        if (ret != DH_SUCCESS || g_adapter == nullptr) {
            std::cout << "Load audio device failed, ret: " << ret << std::endl;
            return ERR_DH_AUDIO_FAILED;
        }
    }
    return DH_SUCCESS;
}

std::string OpenMic(std::string devId)
{
    if (g_micStatus != DeviceStatus::DEVICE_IDLE) {
        std::cout << "Mic device is already opened." << std::endl;
        return "true";
    }
    if (LoadMicDev(devId) != DH_SUCCESS) {
        std::cout << "Load audio device failed." << std::endl;
        return "false";
    }

    AudioDeviceDescriptor captureDesc;
    captureDesc.pins = AudioPortPin::PIN_IN_MIC;
    captureDesc.desc = "";
    AudioSampleAttributes captureAttr;
    captureAttr.type = AudioCategory::AUDIO_IN_MEDIA;
    captureAttr.interleaved = CAPTURE_INTER_LEAVED;
    captureAttr.streamId = CAPTURE_STREAM_ID;
    captureAttr.channelCount = CAPTURE_CHANNEL_MASK;
    captureAttr.sampleRate = AUDIO_SAMPLE_RATE;
    captureAttr.format = AudioFormat::AUDIO_FORMAT_TYPE_PCM_16_BIT;
    int32_t ret = g_adapter->CreateCapture(captureDesc, captureAttr, g_capture, g_captureId);
    if (ret != DH_SUCCESS || g_capture == nullptr) {
        std::cout << "Open MIC device failed." << std::endl;
        return "false";
    }
    g_micStatus = DeviceStatus::DEVICE_OPEN;
    std::cout << "Open MIC device success." << std::endl;
    return "true";
}

static void ReadStreamWait(const int64_t &startTime)
{
    int64_t endTime = GetNowTimeUs();
    int32_t passTime = endTime - startTime;

    if (passTime > AUDIO_FRAME_TIME_INTERFAL_DEFAULT) {
        return;
    }
    int64_t remainTime = AUDIO_FRAME_TIME_INTERFAL_DEFAULT - passTime;
    std::this_thread::sleep_for(std::chrono::microseconds(remainTime));
}

static void Capture()
{
    if (g_capture == nullptr) {
        std::cout << "MIC device is null." << std::endl;
        return;
    }
    if (pthread_setname_np(pthread_self(), CAPTURE_THREAD) != DH_SUCCESS) {
        std::cout << "Capture thread setname failed." << std::endl;
    }
    std::cout << "Capturing thread started." << std::endl;
    g_capture->Start();
    g_micStatus = DeviceStatus::DEVICE_START;

    uint64_t size = 0;
    while (g_micStatus == DeviceStatus::DEVICE_START) {
        std::vector<int8_t> data(RENDER_FRAME_SIZE);
        int64_t startTime = GetNowTimeUs();
        int32_t ret = g_capture->CaptureFrame(data, size);
        if (ret != DH_SUCCESS) {
            std::cout << "CaptureFrame failed, ret: " << ret << std::endl;
            return;
        }
        size_t writeCnt = fwrite(data.data(), 1, RENDER_FRAME_SIZE, g_micFile);
        if (static_cast<int32_t>(writeCnt) != RENDER_FRAME_SIZE) {
            std::cout << "fwrite data failed." << std::endl;
        }
        g_micFrameNum++;
        ReadStreamWait(startTime);
    }
    std::cout << "Capturing thread stopped." << std::endl;
}

std::string StartCapture()
{
    if (g_micStatus == DeviceStatus::DEVICE_IDLE) {
        std::cout << "Mic device is not opened, start capture failed." << std::endl;
        return "false";
    }

    if (g_micStatus == DeviceStatus::DEVICE_OPEN) {
        g_micFile = fopen(MIC_FILE_PATH, "ab+");
        if (g_micFile == nullptr) {
            std::cout << "Open pcm file failed." << std::endl;
            return "false";
        }
        g_capingThread = std::thread(Capture);
        return "true";
    }

    if (g_micStatus == DeviceStatus::DEVICE_START) {
        std::cout << "Mic device is already started." << std::endl;
        return "true";
    }

    if (g_micStatus == DeviceStatus::DEVICE_STOP) {
        g_capingThread = std::thread(Capture);
    }
    return "true";
}

std::string StopCapture()
{
    if (g_capture == nullptr) {
        std::cout << "MIC device is null." << std::endl;
        return "false";
    }
    if (g_micStatus == DeviceStatus::DEVICE_IDLE) {
        std::cout << "Mic device is not opened." << std::endl;
        return "false";
    }
    if (g_micStatus == DeviceStatus::DEVICE_OPEN) {
        std::cout << "Mic device is not started." << std::endl;
        return "false";
    }
    if (g_micStatus == DeviceStatus::DEVICE_STOP) {
        std::cout << "Mic device is already started." << std::endl;
        return "false";
    }
    g_micStatus = DeviceStatus::DEVICE_STOP;
    if (g_capingThread.joinable()) {
        g_capingThread.join();
    }
    g_capture->Stop();
    return "true";
}

std::string CloseMic()
{
    if (g_micStatus == DeviceStatus::DEVICE_IDLE) {
        std::cout << "Mic device is not opened." << std::endl;
        return "false";
    }

    if (g_micStatus == DeviceStatus::DEVICE_START) {
        StopCapture();
    }

    int32_t ret = g_adapter->DestroyCapture(g_captureId);
    if (ret != DH_SUCCESS) {
        std::cout << "Close mic failed." << std::endl;
        return "false";
    }
    if (g_spkStatus == DeviceStatus::DEVICE_IDLE) {
        g_manager->UnloadAdapter(g_devId);
        g_adapter = nullptr;
    }
    if (g_micFile != nullptr) {
        fclose(g_micFile);
        g_micFile = nullptr;
    }
    g_micStatus = DeviceStatus::DEVICE_IDLE;
    std::cout << "Close MIC device success." << std::endl;
    return "true";
}

std::string SetVolume(int vol)
{
    if (g_spkStatus == DeviceStatus::DEVICE_IDLE) {
        std::cout << "Speaker is not opened, can not set volume." << std::endl;
        return "false";
    }
    std::cout << "Please input volum to set [0,15]." << std::endl;
    if (vol < VOLUME_MIN || vol > VOLUME_MAX) {
        std::cout << "Volume is invalid." << std::endl;
        return "false";
    }
    std::cout << "Set volume: " << vol << std::endl;
    AudioExtParamKey key = AudioExtParamKey::AUDIO_EXT_PARAM_KEY_VOLUME;
    std::string condition = "EVENT_TYPE=1;VOLUME_GROUP_ID=1;AUDIO_VOLUME_TYPE=1;";
    std::string volStr = std::to_string(vol);
    int32_t ret = g_adapter->SetExtraParams(key, condition, volStr);
    if (ret != DH_SUCCESS) {
        std::cout << "Set volume failed" << std::endl;
        return "false";
    }
    return "true";
}

std::string GetVolume()
{
    if (g_spkStatus == DeviceStatus::DEVICE_IDLE) {
        std::cout << "Speaker is not opened, can not get volume." << std::endl;
        return "false";
    }
    AudioExtParamKey key = AudioExtParamKey::AUDIO_EXT_PARAM_KEY_VOLUME;
    std::string condition = "EVENT_TYPE=1;VOLUME_GROUP_ID=1;AUDIO_VOLUME_TYPE=1;";
    std::string vol;
    int32_t ret = g_adapter->GetExtraParams(key, condition.c_str(), vol);
    if (ret != DH_SUCCESS) {
        std::cout << "Get Volume failed." << std::endl;
        return "false";
    }
    std::cout << "Get volume success. volume: " << vol <<std::endl;
    return "true";
}

std::string HandleAudioEvent(int32_t cmd)
{
    std::string res = "";
    if (cmd == CMD_FIND) {
        res = FindAudioDevice();
    }
    if (cmd == CMD_OPEN_SPK) {
        res = OpenSpk(g_devId);
    }
    if (cmd == CMD_START_SPK) {
        res = StartRender();
    }
    if (cmd == CMD_STOP_SPK) {
        res = StopRender();
    }
    if (cmd == CMD_CLOSE_SPK) {
        res = CloseSpk();
    }
    if (cmd == CMD_OPEN_MIC) {
        res = OpenMic(g_devId);
    }
    if (cmd == CMD_START_MIC) {
        res = StartCapture();
    }
    if (cmd == CMD_STOP_MIC) {
        res = StopCapture();
    }
    if (cmd == CMD_CLOSE_MIC) {
        res = CloseMic();
    }
    if (cmd == CMD_SET_VOL) {
        res = SetVolume(g_volume);
    }
    if (cmd == CMD_GET_VOL) {
        res = GetVolume();
    }
    return res;
}