60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
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#include "SoundController.h"
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#include <mmdeviceapi.h>
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#include <endpointvolume.h>
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#include <QDebug>
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SoundController::SoundController(QObject *parent) : QObject(parent)
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{
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HRESULT hr = CoInitialize(NULL);
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if (FAILED(hr)) {
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qDebug() << "Failed to initialize COM";
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return;
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}
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hr = CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)&deviceEnumerator);
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if (FAILED(hr)) {
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qDebug() << "Failed to create the device enumerator";
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CoUninitialize();
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return;
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}
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hr = deviceEnumerator->GetDefaultAudioEndpoint(eRender, eMultimedia, &device);
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if (FAILED(hr)) {
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qDebug() << "Failed to get the default audio endpoint";
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deviceEnumerator->Release();
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CoUninitialize();
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return;
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}
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hr = device->Activate(__uuidof(IAudioEndpointVolume), CLSCTX_ALL, NULL, (void**)&endpointVolume);
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if (FAILED(hr)) {
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qDebug() << "Failed to activate the endpoint volume interface";
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device->Release();
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deviceEnumerator->Release();
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CoUninitialize();
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return;
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}
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}
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int SoundController::getSystemVolume()
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{
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float fVolume;
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HRESULT hr = endpointVolume->GetMasterVolumeLevelScalar(&fVolume);
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if (FAILED(hr)) {
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qDebug() << "Failed to get the current volume";
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return -1;
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}
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return static_cast<int>(fVolume * 100);
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}
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bool SoundController::setSystemVolume(int volume)
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{
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float fVolume = static_cast<float>(volume) / 100.0f;
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HRESULT hr = endpointVolume->SetMasterVolumeLevelScalar(fVolume, NULL);
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if (FAILED(hr)) {
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qDebug() << "Failed to set the volume";
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return false;
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}
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return true;
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}
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