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Stopped windows crash when no audio device is detected

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barnold1953 2014-05-20 15:15:45 -07:00
parent 899c89eda7
commit 2329188939
1 changed files with 21 additions and 16 deletions
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37
interface/src/Audio.cpp
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@ -200,22 +200,27 @@ QAudioDeviceInfo defaultAudioDeviceForMode(QAudio::Mode mode) {
CoInitialize(NULL); CoInitialize(NULL);
IMMDeviceEnumerator* pMMDeviceEnumerator = NULL; IMMDeviceEnumerator* pMMDeviceEnumerator = NULL;
CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)&pMMDeviceEnumerator); CoCreateInstance(__uuidof(MMDeviceEnumerator), NULL, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator), (void**)&pMMDeviceEnumerator);
IMMDevice* pEndpoint; IMMDevice* pEndpoint;hr = pMMDeviceEnumerator->GetDefaultAudioEndpoint(mode == QAudio::AudioOutput ? eRender : eCapture, eMultimedia, &pEndpoint);
pMMDeviceEnumerator->GetDefaultAudioEndpoint(mode == QAudio::AudioOutput ? eRender : eCapture, eMultimedia, &pEndpoint); if (hr == E_NOTFOUND){
IPropertyStore* pPropertyStore; printf("Audio Error: device not found\n");
pEndpoint->OpenPropertyStore(STGM_READ, &pPropertyStore); deviceName = QString("NONE");
pEndpoint->Release(); }
pEndpoint = NULL; else {
PROPVARIANT pv; IPropertyStore* pPropertyStore;
PropVariantInit(&pv); pEndpoint->OpenPropertyStore(STGM_READ, &pPropertyStore);
hr = pPropertyStore->GetValue(PKEY_Device_FriendlyName, &pv); pEndpoint->Release();
pPropertyStore->Release(); pEndpoint = NULL;
pPropertyStore = NULL; PROPVARIANT pv;
//QAudio devices seems to only take the 31 first characters of the Friendly Device Name. PropVariantInit(&pv);
const DWORD QT_WIN_MAX_AUDIO_DEVICENAME_LEN = 31; hr = pPropertyStore->GetValue(PKEY_Device_FriendlyName, &pv);
deviceName = QString::fromWCharArray((wchar_t*)pv.pwszVal).left(QT_WIN_MAX_AUDIO_DEVICENAME_LEN); pPropertyStore->Release();
qDebug() << (mode == QAudio::AudioOutput ? "output" : "input") << " device:" << deviceName; pPropertyStore = NULL;
PropVariantClear(&pv); //QAudio devices seems to only take the 31 first characters of the Friendly Device Name.
const DWORD QT_WIN_MAX_AUDIO_DEVICENAME_LEN = 31;
deviceName = QString::fromWCharArray((wchar_t*)pv.pwszVal).left(QT_WIN_MAX_AUDIO_DEVICENAME_LEN);
qDebug() << (mode == QAudio::AudioOutput ? "output" : "input") << " device:" << deviceName;
PropVariantClear(&pv);
}
pMMDeviceEnumerator->Release(); pMMDeviceEnumerator->Release();
pMMDeviceEnumerator = NULL; pMMDeviceEnumerator = NULL;
CoUninitialize(); CoUninitialize();