/// <summary>
/// Determines whether or not the device supports a given format.
/// </summary>
/// <param name="waveFormat">The format to check.</param>
/// <returns>true, if the format is supported; false, otherwise.</returns>
public bool SupportsFormat(WaveFormat waveFormat)
{
WAVEFORMATEX wfx = new WAVEFORMATEX();
wfx.nAvgBytesPerSec = waveFormat.AverageBytesPerSecond;
wfx.wBitsPerSample = waveFormat.BitsPerSample;
wfx.nBlockAlign = waveFormat.BlockAlign;
wfx.nChannels = waveFormat.Channels;
wfx.wFormatTag = (short)(int)waveFormat.FormatTag;
wfx.nSamplesPerSec = waveFormat.SamplesPerSecond;
wfx.cbSize = 0;
IntPtr dummy = new IntPtr(0);
MMSYSERROR ret = NativeMethods.waveInOpen(
ref dummy,
this.deviceId,
ref wfx,
null,
(IntPtr)0,
WaveOpenFlags.WAVE_FORMAT_QUERY);
if (ret == MMSYSERROR.MMSYSERR_NOERROR)
{
return(true);
}
else if (ret == MMSYSERROR.WAVERR_BADFORMAT)
{
return(false);
}
else
{
NativeMethods.Throw(ret, NativeMethods.ErrorSource.WaveIn);
return(false);
}
}
/// <summary>
/// Releases the resuorces used by this handle.
/// </summary>
/// <returns>true, if disposing of the handle succeeded; false, otherwise.</returns>
protected override bool ReleaseHandle()
{
MMSYSERROR ret = NativeMethods.waveOutClose(this);
return(ret == MMSYSERROR.MMSYSERR_NOERROR);
}
private static string ErrorMessage(MMSYSERROR result, string function)
{
return String.Format("{0} calling {1}", result.ToString(), function);
}
public static void Try(MMSYSERROR result, string function)
{
if (result != MMSYSERROR.MMSYSERR_NOERROR)
throw new MmException(result, function);
}
public MmException(MMSYSERROR result, string function)
: base(MmException.ErrorMessage(result, function))
{
this.result = result;
this.function = function;
}