标签：输出设备 PCWSTR HRESULT STDMETHODCALLTYPE C++ interface SetDefaultAudioPlaybackDevic
需要PolicyConfig.h头文件
// ----------------------------------------------------------------------------
// PolicyConfig.h
// Undocumented COM-interface IPolicyConfig.
// Use for set default audio render endpoint
// @author EreTIk
// ----------------------------------------------------------------------------
#pragma once
#include <mmeapi.h>
interface DECLSPEC_UUID("f8679f50-850a-41cf-9c72-430f290290c8")
IPolicyConfig;
class DECLSPEC_UUID("870af99c-171d-4f9e-af0d-e63df40c2bc9")
CPolicyConfigClient;
// ----------------------------------------------------------------------------
// class CPolicyConfigClient
// {870af99c-171d-4f9e-af0d-e63df40c2bc9}
//
// interface IPolicyConfig
// {f8679f50-850a-41cf-9c72-430f290290c8}
//
// Query interface:
// CComPtr<IPolicyConfig> PolicyConfig;
// PolicyConfig.CoCreateInstance(__uuidof(CPolicyConfigClient));
//
// @compatible: Windows 7 and Later
// ----------------------------------------------------------------------------
interface IPolicyConfig : public IUnknown
{
public:
virtual HRESULT GetMixFormat(
PCWSTR,
WAVEFORMATEX **
);
virtual HRESULT STDMETHODCALLTYPE GetDeviceFormat(
PCWSTR,
INT,
WAVEFORMATEX **
);
virtual HRESULT STDMETHODCALLTYPE ResetDeviceFormat(
PCWSTR
);
virtual HRESULT STDMETHODCALLTYPE SetDeviceFormat(
PCWSTR,
WAVEFORMATEX *,
WAVEFORMATEX *
);
virtual HRESULT STDMETHODCALLTYPE GetProcessingPeriod(
PCWSTR,
INT,
PINT64,
PINT64
);
virtual HRESULT STDMETHODCALLTYPE SetProcessingPeriod(
PCWSTR,
PINT64
);
virtual HRESULT STDMETHODCALLTYPE GetShareMode(
PCWSTR,
struct DeviceShareMode *
);
virtual HRESULT STDMETHODCALLTYPE SetShareMode(
PCWSTR,
struct DeviceShareMode *
);
virtual HRESULT STDMETHODCALLTYPE GetPropertyValue(
PCWSTR,
const PROPERTYKEY &,
PROPVARIANT *
);
virtual HRESULT STDMETHODCALLTYPE SetPropertyValue(
PCWSTR,
const PROPERTYKEY &,
PROPVARIANT *
);
virtual HRESULT STDMETHODCALLTYPE SetDefaultEndpoint(
__in PCWSTR wszDeviceId,
__in ERole eRole
);
virtual HRESULT STDMETHODCALLTYPE SetEndpointVisibility(
PCWSTR,
INT
);
};
interface DECLSPEC_UUID("568b9108-44bf-40b4-9006-86afe5b5a620")
IPolicyConfigVista;
class DECLSPEC_UUID("294935CE-F637-4E7C-A41B-AB255460B862")
CPolicyConfigVistaClient;
// ----------------------------------------------------------------------------
// class CPolicyConfigVistaClient
// {294935CE-F637-4E7C-A41B-AB255460B862}
//
// interface IPolicyConfigVista
// {568b9108-44bf-40b4-9006-86afe5b5a620}
//
// Query interface:
// CComPtr<IPolicyConfigVista> PolicyConfig;
// PolicyConfig.CoCreateInstance(__uuidof(CPolicyConfigVistaClient));
//
// @compatible: Windows Vista and Later
// ----------------------------------------------------------------------------
interface IPolicyConfigVista : public IUnknown
{
public:
virtual HRESULT GetMixFormat(
PCWSTR,
WAVEFORMATEX **
); // not available on Windows 7, use method from IPolicyConfig
virtual HRESULT STDMETHODCALLTYPE GetDeviceFormat(
PCWSTR,
INT,
WAVEFORMATEX **
);
virtual HRESULT STDMETHODCALLTYPE SetDeviceFormat(
PCWSTR,
WAVEFORMATEX *,
WAVEFORMATEX *
);
virtual HRESULT STDMETHODCALLTYPE GetProcessingPeriod(
PCWSTR,
INT,
PINT64,
PINT64
); // not available on Windows 7, use method from IPolicyConfig
virtual HRESULT STDMETHODCALLTYPE SetProcessingPeriod(
PCWSTR,
PINT64
); // not available on Windows 7, use method from IPolicyConfig
virtual HRESULT STDMETHODCALLTYPE GetShareMode(
PCWSTR,
struct DeviceShareMode *
); // not available on Windows 7, use method from IPolicyConfig
virtual HRESULT STDMETHODCALLTYPE SetShareMode(
PCWSTR,
struct DeviceShareMode *
); // not available on Windows 7, use method from IPolicyConfig
virtual HRESULT STDMETHODCALLTYPE GetPropertyValue(
PCWSTR,
const PROPERTYKEY &,
PROPVARIANT *
);
virtual HRESULT STDMETHODCALLTYPE SetPropertyValue(
PCWSTR,
const PROPERTYKEY &,
PROPVARIANT *
);
virtual HRESULT STDMETHODCALLTYPE SetDefaultEndpoint(
__in PCWSTR wszDeviceId,
__in ERole eRole
);
virtual HRESULT STDMETHODCALLTYPE SetEndpointVisibility(
PCWSTR,
INT
); // not available on Windows 7, use method from IPolicyConfig
};
主程序调用使用部分：
#include <iostream>
#include<Windows.h>
#include "Mmdeviceapi.h"
#include "PolicyConfig.h"
using namespace std;
HRESULT SetDefaultAudioPlaybackDevice(LPCWSTR devID)
{
HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
IPolicyConfigVista* pPolicyConfig;
ERole reserved = eConsole;
hr = CoCreateInstance(__uuidof(CPolicyConfigVistaClient),
NULL, CLSCTX_ALL, __uuidof(IPolicyConfigVista), (LPVOID*)&pPolicyConfig);
if (SUCCEEDED(hr))
{
hr = pPolicyConfig->SetDefaultEndpoint(devID, reserved);
pPolicyConfig->Release();
}
return hr;
}
int main()
{
auto a = L"{0.0.0.00000000}.{863f782c-0d61-47a2-9fe6-15ae008c5e8d}"; //声音设备的ID
auto b = L"{0.0.0.00000000}.{b5b7d6a2-984e-46ad-bc8f-f49ee617c26a}"; //声音设备的ID
HRESULT hr = SetDefaultAudioPlaybackDevice(a); //设置默认声音输出设备
if (SUCCEEDED(hr))
{
cout << "设置成功" << endl;
}
else
{
cout << "设置失败" << endl;
}
cout << "退出了" << endl;
getchar();
}
标签：输出设备,PCWSTR,HRESULT,STDMETHODCALLTYPE,C++,interface,SetDefaultAudioPlaybackDevic
来源： https://www.cnblogs.com/zzr-stdio/p/16289725.html
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