/**
* Same as Create(), but this method won't check whether it is allowed to
* create an instance of the given driver on its own. This method is
* usually called by host plugins (e.g. VST, AU, DSSI, LV2) to actually
* create their respective audio output devices for the sampler. Usually
* one shouldn't call this method directly, but call Create() instead.
*/
AudioOutputDevice* AudioOutputDeviceFactory::CreatePrivate(String DriverName, std::map<String,String> Parameters) throw (Exception) {
if (!InnerFactories.count(DriverName)) throw Exception("There is no audio output driver '" + DriverName + "'.");
// let's see if we need to create parameters
std::map<String,DeviceCreationParameter*> thisDeviceParams;
DeviceParameterFactory* pParamFactory = ParameterFactories[DriverName];
if (pParamFactory) {
thisDeviceParams = pParamFactory->CreateAllParams(Parameters);
} else {
// no parameters are registered by the driver. Throw if any parameters were specified.
if (Parameters.size() != 0) throw Exception("Driver '" + DriverName + "' does not have any parameters.");
}
// get a free device id
int iDeviceId = -1;
for (int i = 0; i >= 0; i++) { // seek for a free place starting from the beginning
if (!mAudioOutputDevices[i]) {
iDeviceId = i;
mAudioOutputDevices.erase(i);
break;
}
}
if (iDeviceId < 0)
throw Exception("Could not retrieve free device ID!");
// now create the device using those parameters
AudioOutputDevice* pDevice = InnerFactories[DriverName]->Create(thisDeviceParams);
pDevice->setDeviceId(iDeviceId);
// now attach all parameters to the newely created device.
for (std::map<String,DeviceCreationParameter*>::iterator iter = thisDeviceParams.begin(); iter != thisDeviceParams.end(); iter++) {
iter->second->Attach(pDevice);
}
// add new audio device to the audio device list
mAudioOutputDevices[iDeviceId] = pDevice;
return pDevice;
}
