public PortAudioPlayer(int channels, int frequency, uint framesPerBuffer,
PortAudio.PaStreamCallbackDelegate paStreamCallback)
{
log("Initializing...");
this.channels = channels;
this.frequency = frequency;
this.framesPerBuffer = framesPerBuffer;
this.paStreamCallback = paStreamCallback;
if (errorCheck("Initialize", PortAudio.Pa_Initialize()))
{
this.disposed = true;
// if Pa_Initialize() returns an error code,
// Pa_Terminate() should NOT be called.
throw new Exception("Can't initialize audio");
}
int apiCount = PortAudio.Pa_GetHostApiCount();
for (int i = 0; i < apiCount; i++)
{
PortAudio.PaHostApiInfo availableApiInfo = PortAudio.Pa_GetHostApiInfo(i);
log("available API index: " + i + "\n" + availableApiInfo.ToString());
}
this.hostApi = apiSelect();
log("selected Host API: " + this.hostApi);
this.apiInfo = PortAudio.Pa_GetHostApiInfo(this.hostApi);
this.inputDeviceInfo = PortAudio.Pa_GetDeviceInfo(apiInfo.defaultInputDevice);
this.outputDeviceInfo = PortAudio.Pa_GetDeviceInfo(apiInfo.defaultOutputDevice);
log("input device:\n" + inputDeviceInfo.ToString());
log("output device:\n" + outputDeviceInfo.ToString());
}
private int apiSelect()
{
int selectedHostApi = PortAudio.Pa_GetDefaultHostApi();
int apiCount = PortAudio.Pa_GetHostApiCount();
for (int i = 0; i < apiCount; i++)
{
PortAudio.PaHostApiInfo apiInfo = PortAudio.Pa_GetHostApiInfo(i);
if ((apiInfo.type == PortAudio.PaHostApiTypeId.paDirectSound) ||
(apiInfo.type == PortAudio.PaHostApiTypeId.paOSS))
{
selectedHostApi = i;
}
}
return(selectedHostApi);
}
/// <summary>
/// Selects the most appropriate host api
/// </summary>
/// <returns>The most appropriate host api</returns>
public int GetHostApi()
{
if (_Disposed)
{
throw new ObjectDisposedException("PortAudioHandle already disposed");
}
int selectedHostApi = PortAudio.Pa_GetDefaultHostApi();
int apiCount = PortAudio.Pa_GetHostApiCount();
for (int i = 0; i < apiCount; i++)
{
PortAudio.PaHostApiInfo apiInfo = PortAudio.Pa_GetHostApiInfo(i);
if ((apiInfo.type == PortAudio.PaHostApiTypeId.paDirectSound) ||
(apiInfo.type == PortAudio.PaHostApiTypeId.paALSA))
{
selectedHostApi = i;
}
}
return(selectedHostApi);
}
void AudioSettingsControlLoad(object sender, EventArgs e)
{
driverTypeComboBox.Items.Clear();
int hostApiCount = PortAudio.Pa_GetHostApiCount();
for (int i = 0; i < hostApiCount; i++)
{
PortAudio.PaHostApiInfo hostApiInfo = PortAudio.Pa_GetHostApiInfo(i);
if (hostApiInfo.type != PortAudio.PaHostApiTypeId.paInDevelopment)
{
driverTypeComboBox.Items.Add(new HostApiItem(hostApiInfo));
}
}
driverTypeComboBox.SelectedIndex = PortAudio.Pa_GetDefaultHostApi();
sampleRateComboBox.Items.Clear();
sampleRateComboBox.Items.Add(192000);
sampleRateComboBox.Items.Add(176400);
sampleRateComboBox.Items.Add(96000);
sampleRateComboBox.Items.Add(88200);
sampleRateComboBox.Items.Add(48000);
sampleRateComboBox.Items.Add(44100);
sampleRateComboBox.Items.Add(38400);
sampleRateComboBox.Items.Add(37800);
sampleRateComboBox.Items.Add(32000);
sampleRateComboBox.Items.Add(24000);
sampleRateComboBox.Items.Add(22050);
sampleRateComboBox.Items.Add(19200);
sampleRateComboBox.Items.Add(18900);
sampleRateComboBox.Items.Add(16000);
sampleRateComboBox.Items.Add(12000);
sampleRateComboBox.Items.Add(11025);
sampleRateComboBox.Items.Add(9600);
sampleRateComboBox.Items.Add(8000);
sampleRateComboBox.SelectedIndex = 5;
}
