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@VonLatvala
Created February 13, 2018 19:58
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#include "stdio.h"
#include "wchar.h"
#include "tchar.h"
#include "windows.h"
#include "Mmdeviceapi.h"
#include "PolicyConfig.h"
#include "Propidl.h"
#include "Functiondiscoverykeys_devpkey.h"
HRESULT SetDefaultAudioPlaybackDevice(LPCWSTR devID)
{
IPolicyConfigVista *pPolicyConfig;
ERole reserved = eConsole;
HRESULT hr = CoCreateInstance(__uuidof(CPolicyConfigVistaClient),
NULL, CLSCTX_ALL, __uuidof(IPolicyConfigVista), (LPVOID *)&pPolicyConfig);
if (SUCCEEDED(hr))
{
hr = pPolicyConfig->SetDefaultEndpoint(devID, reserved);
pPolicyConfig->Release();
}
return hr;
}
// EndPointController.exe [NewDefaultDeviceID]
int _tmain(int argc, _TCHAR* argv[])
{
// read the command line option, -1 indicates list devices.
int option = -1;
if (argc == 2) option = atoi((char*)argv[1]);
HRESULT hr = CoInitialize(NULL);
if (SUCCEEDED(hr))
{
IMMDeviceEnumerator *pEnum = NULL;
// Create a multimedia device enumerator.
hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL,
CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)&pEnum);
if (SUCCEEDED(hr))
{
IMMDeviceCollection *pDevices;
// Enumerate the output devices.
hr = pEnum->EnumAudioEndpoints(eRender, DEVICE_STATE_ACTIVE, &pDevices);
if (SUCCEEDED(hr))
{
UINT count;
pDevices->GetCount(&count);
if (SUCCEEDED(hr))
{
for (int i = 0; i < count; i++)
{
IMMDevice *pDevice;
hr = pDevices->Item(i, &pDevice);
if (SUCCEEDED(hr))
{
LPWSTR wstrID = NULL;
hr = pDevice->GetId(&wstrID);
if (SUCCEEDED(hr))
{
IPropertyStore *pStore;
hr = pDevice->OpenPropertyStore(STGM_READ, &pStore);
if (SUCCEEDED(hr))
{
PROPVARIANT friendlyName;
PropVariantInit(&friendlyName);
hr = pStore->GetValue(PKEY_Device_FriendlyName, &friendlyName);
if (SUCCEEDED(hr))
{
// if no options, print the device
// otherwise, find the selected device and set it to be default
if (option == -1) printf("Audio Device %d: %ws\n",i, friendlyName.pwszVal);
if (i == option) SetDefaultAudioPlaybackDevice(wstrID);
PropVariantClear(&friendlyName);
}
pStore->Release();
}
}
pDevice->Release();
}
}
}
pDevices->Release();
}
pEnum->Release();
}
}
return hr;
}
// FROM http://www.daveamenta.com/2011-05/programmatically-or-command-line-change-the-default-sound-playback-device-in-windows-7/ [13.02.2018]
// ----------------------------------------------------------------------------
// PolicyConfig.h
// Undocumented COM-interface IPolicyConfig.
// Use for set default audio render endpoint
// @author EreTIk
// ----------------------------------------------------------------------------
#pragma once
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
};
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