public void StopDeviceCapture(IntPtr handle)
{
ALC11.alcCaptureStop(handle);
ALC11.alcCaptureCloseDevice(handle);
#if VERBOSE_AL_DEBUGGING
if (CheckALCError())
{
throw new InvalidOperationException("AL device error!");
}
#endif
}
static string[] PhysicalDevices()
{
// Returns all devices under Windows Vista and newer
if (ALC11.alcIsExtensionPresent(IntPtr.Zero, "ALC_ENUMERATE_ALL_EXT"))
{
return(QueryDevices("ALC_ENUMERATE_ALL_EXT", ALC11.ALC_ALL_DEVICES_SPECIFIER));
}
if (ALC11.alcIsExtensionPresent(IntPtr.Zero, "ALC_ENUMERATION_EXT"))
{
return(QueryDevices("ALC_ENUMERATION_EXT", ALC10.ALC_DEVICE_SPECIFIER));
}
return(new string[] { });
}
/// <summary>
/// Get the available devices.
/// </summary>
public static IEnumerable <string> GetDevices()
{
var deviceList = ALC11.alcIsExtensionPresent(IntPtr.Zero, "ALC_ENUMERATE_ALL_EXT") ?
ALC10.alcGetString(IntPtr.Zero, ALC11.ALC_ALL_DEVICES_SPECIFIER) :
ALC10.alcGetString(IntPtr.Zero, ALC10.ALC_DEVICE_SPECIFIER);
var curString = Marshal.PtrToStringAnsi(deviceList);
while (!string.IsNullOrEmpty(curString))
{
yield return(curString);
deviceList += curString.Length + 1;
curString = Marshal.PtrToStringAnsi(deviceList);
}
}
public IntPtr StartDeviceCapture(string name, int sampleRate, int bufSize)
{
IntPtr result = ALC11.alcCaptureOpenDevice(
name,
(uint)sampleRate,
AL10.AL_FORMAT_MONO16,
bufSize
);
ALC11.alcCaptureStart(result);
#if VERBOSE_AL_DEBUGGING
if (CheckALCError())
{
throw new InvalidOperationException("AL device error!");
}
#endif
return(result);
}
public int CaptureSamples(IntPtr handle, IntPtr buffer, int count)
{
int[] samples = new int[1] {
0
};
ALC10.alcGetIntegerv(
handle,
ALC11.ALC_CAPTURE_SAMPLES,
1,
samples
);
samples[0] = Math.Min(samples[0], count / 2);
if (samples[0] > 0)
{
ALC11.alcCaptureSamples(handle, buffer, samples[0]);
}
#if VERBOSE_AL_DEBUGGING
if (CheckALCError())
{
throw new InvalidOperationException("AL device error!");
}
#endif
return(samples[0] * 2);
}