multimedia/client/qt_gl_/yuvgl/media/AudioCapture.cpp

#include "AudioCapture.h"
#include "Debuger.h"
PaStream *gStreamOut = nullptr;

CaptureAudio::CaptureAudio(uint16_t rate, uint8_t channel) {
	this->mChanel = channel;
	this->mSampleRate = rate;
	this->mSize = 0;
	this->mStatus = FAIL;
	this->observer = nullptr;

}

int CaptureAudio::SetObserver(CaptureAudioObserver* ob) {
	if (nullptr == ob) return -1;
	this->observer = ob;
	return 0;
}


int paOutStreamBkss(const void* input, void* output, unsigned long frameCount,
	const PaStreamCallbackTimeInfo* timeInfo, PaStreamCallbackFlags statusFlags, void * userData)
{
	CaptureAudio *pCap;
	Debuger::Debug(L"%d\r\n", frameCount);
	if (userData != nullptr) {
		pCap = (CaptureAudio *)userData;
		pCap->OnCallBack(input,output,frameCount);
	}
	pCap->AddCnt(4 * frameCount);
	return 0;
}

int CaptureAudio::OnCallBack(const void* input, void* output, unsigned long frameCount) {
	if(nullptr != this->observer)
		this->observer->OnAudioData(input, frameCount);
	return 0;
}

CaptureAudio::~CaptureAudio() {
	if(mInStream != nullptr)
		Pa_CloseStream(mInStream);
}

int CaptureAudio::StartCapture()
{
	PaError err = paNoError;
	if (this->mStatus == RUNNING) {
		err = Pa_StartStream(mInStream);
		if (err != paNoError) {
			this->mStatus = FAIL;
		}
	}
	else
		return -1;
	
	return 0;
}

vector<CaptureAudio::MICInfo> CaptureAudio::EnumSpeakers()
{
	vector<CaptureAudio::MICInfo> ret;
	PaError err = Pa_Initialize();
	if (err != paNoError) {
		Debuger::Debug(L"init stream error\r\n");
		mStatus = FAIL;
	}
	//»ñµÃÉ豸ÊýÁ¿
	PaDeviceIndex iNumDevices = Pa_GetDeviceCount();
	if (iNumDevices <= 0)
	{
		return ret;
	}
	for (int i = 0; i < iNumDevices; i++)
	{
		MICInfo ins;
		ins.index = i;
		const PaDeviceInfo *deviceInfo = Pa_GetDeviceInfo(i);
		if (nullptr != deviceInfo)
			if (deviceInfo->maxInputChannels > 0) {
				ins.name = deviceInfo->name;
				ret.push_back(ins);
			}
	}
	return ret;
}

int CaptureAudio::InitCapture(int index,uint16_t rate, uint8_t channel) {
	PaStreamParameters intputParameters;
	PaError err = paNoError;
	err = Pa_Initialize();
	if (err != paNoError) goto error;
	if (index < 0)
	{
		index = Pa_GetDefaultInputDevice();
	}
	if (paNoDevice == index) {
		mStatus = FAIL;
		return -1;
	}
	intputParameters.device = index;
	intputParameters.channelCount = 2;
	intputParameters.sampleFormat = paInt16;
	intputParameters.suggestedLatency = Pa_GetDeviceInfo(intputParameters.device)->defaultLowInputLatency;
	intputParameters.hostApiSpecificStreamInfo = NULL;
	
	err = Pa_OpenStream(&mInStream, &intputParameters, NULL, 44100, 1024,
		paFramesPerBufferUnspecified, paOutStreamBkss, this);
	if (err != paNoError) {
		this->mStatus = FAIL;
		return -1;
	}
	this->mStatus = RUNNING;
	return 0;
error:
	Pa_Terminate();
	return -1;
}

void CaptureAudio::StopCapture()
{
	if (this->mStatus == RUNNING) {
		Pa_StopStream(mInStream);
		this->mStatus = STOP;
	}
}
std::string WString2String(const std::wstring& ws)
{
    std::string strLocale = setlocale(LC_ALL, "");
    const wchar_t* wchSrc = ws.c_str();
    size_t nDestSize = wcstombs(NULL, wchSrc, 0) + 1;
    char *chDest = new char[nDestSize];
    memset(chDest, 0, nDestSize);
    wcstombs(chDest, wchSrc, nDestSize);
    std::string strResult = chDest;
    delete[]chDest;
    setlocale(LC_ALL, strLocale.c_str());
    return strResult;
}
vector<CaptureAudioFfmpeg::MICInfo> CaptureAudioFfmpeg::EnumSpeakers()
{
    vector<CaptureAudioFfmpeg::MICInfo> ret;
    std::vector<std::wstring> names;
    IEnumMoniker *pEnum = nullptr;
    // Create the System Device Enumerator.
    ICreateDevEnum *pDevEnum;
    HRESULT hr = CoCreateInstance(CLSID_SystemDeviceEnum, nullptr,
        CLSCTX_INPROC_SERVER, IID_PPV_ARGS(&pDevEnum));

    if (SUCCEEDED(hr))
    {
        // Create an enumerator for the category.
        hr = pDevEnum->CreateClassEnumerator(CLSID_AudioInputDeviceCategory, &pEnum, 0);
        if (hr == S_FALSE)
        {
            hr = VFW_E_NOT_FOUND;  // The category is empty. Treat as an error.
        }
        pDevEnum->Release();
    }

    if (!SUCCEEDED(hr))
        return ret;

    IMoniker *pMoniker = nullptr;
    while (pEnum->Next(1, &pMoniker, nullptr) == S_OK)
    {
        IPropertyBag *pPropBag;
        IBindCtx* bindCtx = nullptr;
        LPOLESTR str = nullptr;
        VARIANT var;
        VariantInit(&var);

        HRESULT hr = pMoniker->BindToStorage(0, 0, IID_PPV_ARGS(&pPropBag));
        if (FAILED(hr))
        {
            pMoniker->Release();
            continue;
        }

        // Get description or friendly name.
        hr = pPropBag->Read(L"Description", &var, 0);
        if (FAILED(hr))
        {
            hr = pPropBag->Read(L"FriendlyName", &var, 0);
        }
        if (SUCCEEDED(hr))
        {
            names.push_back(var.bstrVal);
            std::string x = WString2String(var.bstrVal);
            CaptureAudioFfmpeg::MICInfo ele;
            ele.name = x;
            ret.push_back(ele);
            VariantClear(&var);
        }

        pPropBag->Release();
        pMoniker->Release();
    }

    pEnum->Release();

    return ret;
}

CaptureAudioFfmpeg::CaptureAudioFfmpeg(uint16_t rate, uint8_t channel)
{

}