template <typename T> ComPointer<T> getService(const Filter &filter, REFGUID guidService, REFIID riid)
{
//normally we should use IID_IMFGetService but this introduces another dependency
//so here we simply define our own IId with the same value
ComPointer<T> ret;
ComPointer<IMFGetService> getService(filter, IID_IMFGetService);
if (getService) {
getService->GetService(guidService, riid, reinterpret_cast<void**>(ret.pparam()));
}
return ret;
}
QList<InputPin> BackendNode::pins(const Filter &filter, PIN_DIRECTION wantedDirection)
{
QList<InputPin> ret;
if (filter) {
ComPointer<IEnumPins> enumPin;
HRESULT hr = filter->EnumPins(enumPin.pparam());
Q_UNUSED(hr);
Q_ASSERT( SUCCEEDED(hr));
InputPin pin;
while (enumPin->Next(1, pin.pparam(), 0) == S_OK) {
PIN_DIRECTION dir;
hr = pin->QueryDirection(&dir);
Q_ASSERT( SUCCEEDED(hr));
if (dir == wantedDirection) {
ret.append(pin);
}
}
}
return ret;
}
QHash<QByteArray, QVariant> Backend::objectDescriptionProperties(Phonon::ObjectDescriptionType type, int index) const
{
QMutexLocker locker(&m_directShowMutex);
QHash<QByteArray, QVariant> ret;
switch (type)
{
case Phonon::AudioOutputDeviceType:
{
#ifdef Q_OS_WINCE
ret["name"] = QLatin1String("default audio device");
#else
const AudioMoniker &mon = m_audioOutputs[index];
LPOLESTR str = 0;
HRESULT hr = mon->GetDisplayName(0,0, &str);
if (SUCCEEDED(hr)) {
QString name = QString::fromUtf16((const unsigned short*) str);
ComPointer<IMalloc> alloc;
::CoGetMalloc(1, alloc.pparam());
alloc->Free(str);
ret["name"] = name.mid(name.indexOf('\\') + 1);
}
#endif
}
break;
#ifndef QT_NO_PHONON_EFFECT
case Phonon::EffectType:
{
WCHAR name[80]; // 80 is clearly stated in the MSDN doc
HRESULT hr = ::DMOGetName(m_audioEffects[index], name);
if (SUCCEEDED(hr)) {
ret["name"] = QString::fromUtf16((const unsigned short*) name);
}
}
break;
#endif //QT_NO_PHONON_EFFECT
default:
break;
}
return ret;
}
QList<int> Backend::objectDescriptionIndexes(Phonon::ObjectDescriptionType type) const
{
QMutexLocker locker(&m_directShowMutex);
QList<int> ret;
switch(type)
{
case Phonon::AudioOutputDeviceType:
{
#ifdef Q_OS_WINCE
ret << 0; // only one audio device with index 0
#else
ComPointer<ICreateDevEnum> devEnum(CLSID_SystemDeviceEnum, IID_ICreateDevEnum);
if (!devEnum) {
return ret; //it is impossible to enumerate the devices
}
ComPointer<IEnumMoniker> enumMon;
HRESULT hr = devEnum->CreateClassEnumerator(CLSID_AudioRendererCategory, enumMon.pparam(), 0);
if (FAILED(hr)) {
break;
}
AudioMoniker mon;
//let's reorder the devices so that directshound appears first
int nbds = 0; //number of directsound devices
while (S_OK == enumMon->Next(1, mon.pparam(), 0)) {
LPOLESTR str = 0;
mon->GetDisplayName(0,0,&str);
const QString name = QString::fromUtf16((const unsigned short*) str);
ComPointer<IMalloc> alloc;
::CoGetMalloc(1, alloc.pparam());
alloc->Free(str);
int insert_pos = 0;
if (!m_audioOutputs.contains(mon)) {
insert_pos = m_audioOutputs.count();
m_audioOutputs.append(mon);
} else {
insert_pos = m_audioOutputs.indexOf(mon);
}
if (name.contains(QLatin1String("DirectSound"))) {
ret.insert(nbds++, insert_pos);
} else {
ret.append(insert_pos);
}
}
#endif
break;
}
#ifndef QT_NO_PHONON_EFFECT
case Phonon::EffectType:
{
m_audioEffects.clear();
ComPointer<IEnumDMO> enumDMO;
HRESULT hr = ::DMOEnum(DMOCATEGORY_AUDIO_EFFECT, DMO_ENUMF_INCLUDE_KEYED, 0, 0, 0, 0, enumDMO.pparam());
if (SUCCEEDED(hr)) {
CLSID clsid;
while (S_OK == enumDMO->Next(1, &clsid, 0, 0)) {
ret += m_audioEffects.count();
m_audioEffects.append(clsid);
}
}
break;
}
break;
#endif //QT_NO_PHONON_EFFECT
default:
break;
}
return ret;
}