#include "stdafx.h"

/************************音频的输入输出设备**************************/

#include <Mmdeviceapi.h>

#include <Functiondiscoverykeys_devpkey.h>

#include <locale.h>

#define EXIT_ON_ERROR(hres)  \

              if (FAILED(hres)) { goto Exit; }

#define SAFE_RELEASE(punk)  \

              if ((punk) != NULL)  \

                             { (punk)->Release(); (punk) = NULL; }

const CLSID CLSID_MMDeviceEnumerator = __uuidof(MMDeviceEnumerator);

const IID IID_IMMDeviceEnumerator = __uuidof(IMMDeviceEnumerator);

void PrintEndpointNames()

{

    HRESULT hr = S_OK;

    IMMDeviceEnumerator *pEnumerator = NULL;

    IMMDeviceCollection *pRenderCollection = NULL;

    IMMDeviceCollection *pCaptureCollection = NULL;

    IMMDevice *pEndpoint = NULL;

    IPropertyStore *pProps = NULL;

    LPWSTR pwszID = NULL;

    hr = CoCreateInstance(

        CLSID_MMDeviceEnumerator, NULL,

        CLSCTX_ALL, IID_IMMDeviceEnumerator,

        (void**)&pEnumerator);

    EXIT_ON_ERROR(hr)

        //switch eRender or eCapture

        hr = pEnumerator->EnumAudioEndpoints(

        eCapture, DEVICE_STATE_ACTIVE,

        &pRenderCollection);

    EXIT_ON_ERROR(hr)

        UINT  count;

    hr = pRenderCollection->GetCount(&count);

    EXIT_ON_ERROR(hr)

        if (count == )

        {

            printf("No endpoints found.\n");

        }

    // Each loop prints the name of an endpoint device.

    for (ULONG i = ; i < count; i++)

    {

        // Get pointer to endpoint number i.

        hr = pRenderCollection->Item(i, &pEndpoint);

        EXIT_ON_ERROR(hr)

            // Get the endpoint ID string.

            hr = pEndpoint->GetId(&pwszID);

        EXIT_ON_ERROR(hr)

            hr = pEndpoint->OpenPropertyStore(

            STGM_READ, &pProps);

        EXIT_ON_ERROR(hr)

            PROPVARIANT varName;

        // Initialize container for property value.

        PropVariantInit(&varName);

        // Get the endpoint's friendly-name property.

        hr = pProps->GetValue(

            PKEY_Device_FriendlyName, &varName);

        EXIT_ON_ERROR(hr)

            setlocale(LC_ALL, "chs");//中文宽字符输出

        // Print endpoint friendly name and endpoint ID.

        wprintf(L"Endpoint %d: \"%s\" ( %s )\n",

            i, varName.pwszVal, pwszID);

        CoTaskMemFree(pwszID);

        pwszID = NULL;

        PropVariantClear(&varName);

        SAFE_RELEASE(pProps)

            SAFE_RELEASE(pEndpoint)

    }

    SAFE_RELEASE(pEnumerator)

        SAFE_RELEASE(pRenderCollection)

        return;

Exit:

    printf("Error!\n");

    CoTaskMemFree(pwszID);

    SAFE_RELEASE(pEnumerator)

        SAFE_RELEASE(pRenderCollection)

        SAFE_RELEASE(pEndpoint)

        SAFE_RELEASE(pProps)

}

/************************音频的输入输出设备**************************/

int _tmain(int argc, _TCHAR* argv[])

{

    CoInitializeEx(NULL, COINIT_MULTITHREADED);

    PrintEndpointNames();

    getchar();

    return ;

}