<Windows系统>使用C/C++语言控制7.1声道音量源代码

在国内的网址上找不到类似的文章，于是从其他方面着手，找到了如下的代码。

并使用VS2010编译通过，代码公布，遵循GPL规定。

具体代码从GITHUB中的QT代码移植到VS2010
点击打开链接

// wAudio.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

#include <Windows.h>
#include <Endpointvolume.h>
#include <Mmdeviceapi.h>
#include <conio.h>
#include <mmdeviceapi.h>
#include <devicetopology.h>
#include <Ksmedia.h>
#include <math.h>

#pragma comment(lib, "Winmm.lib")

HRESULT _hr;
IMMDeviceEnumerator *_pDeviceEnumerator;
IMMDevice *_pDefaultDevice;

IDeviceTopology *_pDeviceTopology;
IConnector *_pConnectorFrom;
IConnector *_pConnectorTo;
IPart *_pPart;
IAudioVolumeLevel *_pAudioVolumeLevelFront;
IAudioVolumeLevel *_pAudioVolumeLevelRear;
IAudioVolumeLevel *_pAudioVolumeLevelSubwoofer;
IAudioVolumeLevel *_pAudioVolumeLevelCenter;
IAudioVolumeLevel *_pAudioVolumeLevelSide;

#define version "1.0.0"
#define progname "wAudio.exe"
int dID = 1;

void usage(void)
{
fprintf(stderr, "Audio volume control for gaming Version: %s\n"
"\n(c) Tody 2018, T-ware Inc.\n"
"\nUsage:\n\t%s <ID volume>"
"\nID Options:\n"
" 1 front volume\n"
" 2 Rear volume\n"
" 3 Subwoofer volume\n"
" 4 Center volume\n"
" 5 Side volume\n", version, progname );

exit(1);
}
float dbToPercent(float value)
{
return powf(10.0f, (value/20.0f)) * 100.0f;
}

float percentToDb(float value)
{
return 20 * log10(value/100);
}

void on_hSlider_Front_valueChanged(int value)
{
if(_pAudioVolumeLevelFront)
{
float valueDB =percentToDb(value);
float valDBs[2] = { valueDB, valueDB };
_pAudioVolumeLevelFront->SetLevelAllChannels(valDBs, 2, NULL);
}
}

void on_hSlider_Rear_valueChanged(int value)
{
if(_pAudioVolumeLevelRear)
{
float valueDB = percentToDb(value);
float valDBs[2] = { valueDB, valueDB };
_pAudioVolumeLevelRear->SetLevelAllChannels(valDBs, 2, NULL);
}
}

void on_hSlider_Sub_valueChanged(int value)
{
if(_pAudioVolumeLevelSubwoofer)
{
float valueDB = percentToDb(value);
_pAudioVolumeLevelSubwoofer->SetLevel(0, valueDB, NULL);
}
}

void on_hSlider_Center_valueChanged(int value)
{
if(_pAudioVolumeLevelCenter)
{
float valueDB = percentToDb(value);
_pAudioVolumeLevelCenter->SetLevel(0, valueDB, NULL);
}
}

void on_hSlider_Side_valueChanged(int value)
{
if(_pAudioVolumeLevelSide)
{
float valueDB = percentToDb(value);
float valDBs[2] = { valueDB, valueDB };
_pAudioVolumeLevelSide->SetLevelAllChannels(valDBs, 2, NULL);
}
}

int main(int argc, char* argv[])
{
float ch0, ch1;
int volume=100;

if (argc!=3)
usage();

if (atoi(argv[1])<1 || atoi(argv[1])>5)
usage();

if (atoi(argv[2])>100 || atoi(argv[2])<0)
usage();

dID = atoi(argv[1]);
volume=atoi(argv[2]);

// Initialize COM component
_hr = CoInitialize(NULL);

if(FAILED(_hr)){
printf("CoInitialize failed");
return 1;
}

_hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_INPROC_SERVER, __uuidof(IMMDeviceEnumerator), (LPVOID *)&_pDeviceEnumerator);
if (_hr != S_OK){
fprintf(stderr,"MMDeviceEnumerator failed\n");
return 1;
}

_hr = _pDeviceEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &_pDefaultDevice); // need default device in mmsys.cpl Speakers
if (_hr != S_OK){
fprintf(stderr,"GetDefaultAudioEndpoint failed\n");
return 1;
}

_hr = _pDefaultDevice->Activate(__uuidof(IDeviceTopology), CLSCTX_INPROC_SERVER, NULL, (PVOID *)&_pDeviceTopology);
if (_hr != S_OK){
fprintf(stderr,"IDeviceTopology failed\n");
return 1;
}

_hr = _pDeviceTopology->GetConnector(0, &_pConnectorFrom);
if (_hr != S_OK){
fprintf(stderr,"GetConnector failed\n");
return 1;
}

_hr = _pConnectorFrom->GetConnectedTo(&_pConnectorTo);
if (_hr != S_OK){
fprintf(stderr,"GetConnectedTo failed\n");
return 1;
}

_hr = _pConnectorTo->QueryInterface(__uuidof(IPart), (PVOID *)&_pPart);
if (_hr != S_OK){
fprintf(stderr,"QueryInterface failed\n");
return 1;
}

LPWSTR PartName = nullptr;
_pPart->GetName(&PartName);
wprintf(L"> %s\n", PartName); // Realtek High Definition Audio
CoTaskMemFree(PartName);
PartName = nullptr;

IPartsList *pPartList = nullptr;
_hr = _pPart->EnumPartsIncoming(&pPartList);
if(_hr != S_OK){
fprintf(stderr,"EnumPartsIncoming failed\n");
return 1;
}

IPart *pPartItem1 = nullptr;
_hr = pPartList->GetPart(0, &pPartItem1);
if(_hr != S_OK){
fprintf(stderr,"GetPart failed\n");
return 1;
}

LPWSTR PartNameItem1 = nullptr;
pPartItem1->GetName(&PartNameItem1);
wprintf(L"> %s\n", PartNameItem1);
CoTaskMemFree(PartNameItem1);
PartNameItem1 = nullptr;

// Find GUID/KSNODE in Ksmedia.h and see what interface you can init
///// https://msdn.microsoft.com/en-us/library/windows/desktop/dd371442(v=vs.85).aspx GUID guidPartItem1;
_hr = pPartItem1->GetSubType(&guidPartItem1); // KSNODETYPE_MUTE pPartItem1->Activate(IAudioMute) (can control Master Mute of Realtek HD Audio output)
if(_hr != S_OK){
fprintf(stderr,"GetSubType PartItem1 failed\n");
return 1;
}

IPartsList *pPartList2 = nullptr;
IPart *pPartItem2 = nullptr;

_hr = pPartItem1->EnumPartsIncoming(&pPartList2);
if(_hr != S_OK){
fprintf(stderr,"EnumPartsIncoming from PartItem1 failed\n");
return 1;
}

_hr = pPartList2->GetPart(0, &pPartItem2);
if(_hr != S_OK){
fprintf(stderr,"GetPart PartList2 failed\n");
return 1;
}

LPWSTR PartNameItem2 = nullptr;
pPartItem2->GetName(&PartNameItem2);
wprintf(L"> %s\n", PartNameItem2);
CoTaskMemFree(PartNameItem2);
PartNameItem2 = nullptr;

GUID guidPartItem2;
_hr = pPartItem2->GetSubType(&guidPartItem2); // KSNODETYPE_VOLUME pPartItem2->Activate(IAudioVolumeLevel) (can control Master Volume of Realtek HD Audio output)
if(_hr != S_OK){
fprintf(stderr,"GetSubType PartItem2 failed\n");
return 1;
}

IPartsList *pPartList3 = nullptr;
_hr = pPartItem2->EnumPartsIncoming(&pPartList3);
if(_hr != S_OK){
fprintf(stderr,"EnumPartsIncoming PartItem2 failed\n");
return 1;
}

IPart *pPartItem3 = nullptr;
pPartList3->GetPart(0, &pPartItem3);
if(_hr != S_OK){
fprintf(stderr,"GetPart PartItem3 failed\n");
return 1;
}

LPWSTR PartNameItem3;
pPartItem3->GetName(&PartNameItem3);
wprintf(L"> %s\n", PartNameItem3);
CoTaskMemFree(PartNameItem3);
PartNameItem3 = nullptr;

GUID guidPartItem3;
_hr = pPartItem3->GetSubType(&guidPartItem3); // KSNODETYPE_SUM (Front, Rear, Subwoofer, Center, Side, ...)
if(_hr != S_OK){
fprintf(stderr,"GetSubType PartItem3 failed\n");
return 1;
}

IPartsList *pPartList4 = nullptr;
_hr = pPartItem3->EnumPartsIncoming(&pPartList4);
if(_hr != S_OK){
fprintf(stderr,"EnumPartsIncoming PartItem3 failed\n");
return 1;
}

UINT CountLevels;
pPartList4->GetCount(&CountLevels); // PartList4Count

printf("> Count Levels: %d\n", CountLevels);

// (Front, Rear, Subwoofer, Center, Side, ...)
// -------
// Front
IPart *pPartItemFront = nullptr;
pPartList4->GetPart(CountLevels-1, &pPartItemFront);

LPWSTR PartItem4Name;
pPartItemFront->GetName(&PartItem4Name);
wprintf(L"> %s\n", PartItem4Name);
CoTaskMemFree(PartItem4Name);
PartItem4Name = nullptr;

GUID guidPartItem4;
_hr = pPartItemFront->GetSubType(&guidPartItem4); // KSNODETYPE_VOLUME pPartItemLast->Activate(IAudioVolumeLevel)
if(_hr != S_OK){
fprintf(stderr,"GetSubType Front failed\n");
return 1;
}

_hr = pPartItemFront->Activate(CLSCTX_INPROC, __uuidof(IAudioVolumeLevel), (PVOID *)&_pAudioVolumeLevelFront);
if(_hr != S_OK){
fprintf(stderr,"Activate Front failed\n");
return 1;
}

if(pPartItemFront)
{
pPartItemFront->Release();
pPartItemFront = nullptr;
}

// -------
// Side
IPart *pPartItemRear = nullptr;
pPartList4->GetPart(CountLevels-2, &pPartItemRear);

LPWSTR PartItem5Name;
pPartItemRear->GetName(&PartItem5Name);
wprintf(L"> %s\n", PartItem5Name);
CoTaskMemFree(PartItem5Name);
PartItem5Name = nullptr;

_hr = pPartItemRear->Activate(CLSCTX_INPROC, __uuidof(IAudioVolumeLevel), (PVOID *)&_pAudioVolumeLevelRear);
if(_hr != S_OK){
fprintf(stderr,"Activate Side failed\n");
return 1;
}

if(pPartItemRear)
{
pPartItemRear->Release();
pPartItemRear = nullptr;
}

// -------
// Subwoofer
IPart *pPartItemSubwoofer = nullptr;
pPartList4->GetPart(CountLevels-3, &pPartItemSubwoofer);

LPWSTR PartItem6Name;
pPartItemSubwoofer->GetName(&PartItem6Name);
wprintf(L"> %s\n", PartItem6Name);
CoTaskMemFree(PartItem6Name);
PartItem6Name = nullptr;

_hr = pPartItemSubwoofer->Activate(CLSCTX_INPROC, __uuidof(IAudioVolumeLevel), (PVOID *)&_pAudioVolumeLevelSubwoofer);
if(_hr != S_OK){
fprintf(stderr,"Activate Subwoofer failed\n");
return 1;
}

if(pPartItemSubwoofer)
{
pPartItemSubwoofer->Release();
pPartItemSubwoofer = nullptr;
}

// -------
// Center
IPart *pPartItemCenter = nullptr;
pPartList4->GetPart(CountLevels-4, &pPartItemCenter);

LPWSTR PartItem7Name;
pPartItemCenter->GetName(&PartItem7Name);
wprintf(L"> %s\n", PartItem7Name);
CoTaskMemFree(PartItem7Name);
PartItem7Name = nullptr;

_hr = pPartItemCenter->Activate(CLSCTX_INPROC, __uuidof(IAudioVolumeLevel), (PVOID *)&_pAudioVolumeLevelCenter);
if(_hr != S_OK){
fprintf(stderr,"Activate Center failed\n");
return 1;
}

if(pPartItemCenter)
{
pPartItemCenter->Release();
pPartItemCenter = nullptr;
}

/*
// -------
// Mute
IPart *pPartItemSide = nullptr;
pPartList4->GetPart(CountLevels-5, &pPartItemSide);

LPWSTR PartItem8Name;
pPartItemSide->GetName(&PartItem8Name);
wprintf(L"8: %s\n", PartItem8Name);
CoTaskMemFree(PartItem8Name);
PartItem8Name = nullptr;

_hr = pPartItemSide->Activate(CLSCTX_INPROC, __uuidof(IAudioVolumeLevel), (PVOID *)&_pAudioVolumeLevelSide);
if(_hr != S_OK){
fprintf(stderr,"Activate failed\n");
return 1;
}

if(pPartItemSide)
{
pPartItemSide->Release();
pPartItemSide = nullptr;
}
*/
printf("> Control code: <%d %d>\n\n\tSetting volume....\n", dID, volume);
/// control code

switch(dID){
case 1: // Front
on_hSlider_Front_valueChanged(volume);
_pAudioVolumeLevelFront->GetLevel(0, &ch0);
_pAudioVolumeLevelFront->GetLevel(1, &ch1);
printf("\n\t[Front]# Left: %3.0f, Right: %3.0f", dbToPercent(ch0), dbToPercent(ch1));
break;

case 2: // Rear
on_hSlider_Rear_valueChanged(volume);
_pAudioVolumeLevelRear->GetLevel(0, &ch0);
_pAudioVolumeLevelRear->GetLevel(1, &ch1);
printf("\n\t[Rear]# Left: %3.0f, Right: %3.0f", dbToPercent(ch0), dbToPercent(ch1));
break;

case 3: // Subwoofer
on_hSlider_Sub_valueChanged(volume);
_pAudioVolumeLevelSubwoofer->GetLevel(0, &ch0);
printf("\n\t[Subwoofer]# %3.0f", dbToPercent(ch0));
break;

case 4: // Center
on_hSlider_Center_valueChanged(volume);
_pAudioVolumeLevelCenter->GetLevel(0, &ch0);
printf("\n\t[Center]# %3.0f", dbToPercent(ch0));
break;

case 5: // Side
on_hSlider_Side_valueChanged(volume);
_pAudioVolumeLevelSide->GetLevel(0, &ch0);
_pAudioVolumeLevelSide->GetLevel(1, &ch1);
printf("\n\t[Side]# Left: %3.0f, Right: %3.0f", dbToPercent(ch0), dbToPercent(ch1));
break;
}

if(_pAudioVolumeLevelFront)
{
_pAudioVolumeLevelFront->Release();
_pAudioVolumeLevelFront = nullptr;
}

if(_pAudioVolumeLevelRear)
{
_pAudioVolumeLevelRear->Release();
_pAudioVolumeLevelRear = nullptr;
}

if(_pAudioVolumeLevelSubwoofer)
{
_pAudioVolumeLevelSubwoofer->Release();
_pAudioVolumeLevelSubwoofer = nullptr;
}

if(_pAudioVolumeLevelCenter)
{
_pAudioVolumeLevelCenter->Release();
_pAudioVolumeLevelCenter = nullptr;
}

if(_pAudioVolumeLevelSide)
{
_pAudioVolumeLevelSide->Release();
_pAudioVolumeLevelSide = nullptr;
}

if(_pPart)
{
_pPart->Release();
_pPart = nullptr;
}

if(_pConnectorTo)
{
_pConnectorTo->Release();
_pConnectorTo = nullptr;
}

if(_pConnectorFrom)
{
_pConnectorFrom->Release();
_pConnectorFrom = nullptr;
}

if(_pDeviceTopology)
{
_pDeviceTopology->Release();
_pDeviceTopology = nullptr;
}

if(_pDefaultDevice)
{
_pDefaultDevice->Release();
_pDefaultDevice = nullptr;
}

if(_pDeviceEnumerator)
{
_pDeviceEnumerator->Release();
_pDeviceEnumerator = nullptr;
}

CoUninitialize();
return 0;
}