/// <summary>
/// Gets the playback bytes count.
/// </summary>
/// <param name="deviceHandle">The device handle.</param>
/// <returns>The number of bytes played during this session</returns>
/// <exception cref="TimeoutException">Occurs when the interop lock cannot be acquired.</exception>
/// <exception cref="LegacyAudioException">Occurs when the MME interop call fails</exception>
/// <exception cref="ArgumentException">Occurs when the device does not return a byte count.</exception>
public static long GetPlaybackBytesCount(IntPtr deviceHandle)
{
if (!TryEnterWaveOperation(deviceHandle))
{
return(0);
}
try
{
var time = new MmTime {
Type = MmTime.TimeBytes
};
var structSize = Marshal.SizeOf(time);
LegacyAudioException.Try(
NativeMethods.GetPlaybackPosition(deviceHandle, out time, structSize),
nameof(NativeMethods.GetPlaybackPosition));
if (time.Type != MmTime.TimeBytes)
{
throw new ArgumentException($"{nameof(NativeMethods.GetPlaybackPosition)}: "
+ $"wType -> Expected {nameof(MmTime.TimeBytes)}, Received {time.Type}");
}
return(time.CB);
}
finally { Monitor.Exit(SyncLock); }
}
/// <summary>
/// Gets the current position in bytes from the wave output device.
/// (n.b. this is not the same thing as the position within your reader
/// stream - it calls directly into waveOutGetPosition)
/// </summary>
/// <returns>Position in bytes</returns>
public long GetPosition()
{
lock (WaveOutLock)
{
var time = new MmTime()
{
Type = MmTime.TIME_BYTES
};
MmException.Try(WaveInterop.NativeMethods.waveOutGetPosition(DeviceHandle, out time, Marshal.SizeOf(time)), nameof(WaveInterop.NativeMethods.waveOutGetPosition));
if (time.Type != MmTime.TIME_BYTES)
{
throw new Exception(string.Format($"{nameof(WaveInterop.NativeMethods.waveOutGetPosition)}: wType -> Expected {0}, Received {1}", MmTime.TIME_BYTES, time.Type));
}
return(time.CB);
}
}
/// <summary>
/// Gets the playback bytes count.
/// </summary>
/// <param name="deviceHandle">The device handle.</param>
/// <returns>The number of bytes played during this session</returns>
/// <exception cref="TimeoutException">Occurs when the interop lock cannot be acquired.</exception>
/// <exception cref="MmException">Occurs when the MME interop call fails</exception>
/// <exception cref="ArgumentException">Occurs when the device does not return a byte count.</exception>
public static long GetPlaybackBytesCount(IntPtr deviceHandle)
{
if (deviceHandle == IntPtr.Zero)
{
return(0);
}
var acquired = false;
Monitor.TryEnter(SyncLock, LockTimeout, ref acquired);
if (acquired == false)
{
throw new TimeoutException(TimeoutErrorMessage);
}
try
{
var time = new MmTime()
{
Type = MmTime.TIME_BYTES
};
var structSize = Marshal.SizeOf(time);
MmException.Try(
NativeMethods.waveOutGetPosition(deviceHandle, out time, structSize),
nameof(NativeMethods.waveOutGetPosition));
if (time.Type != MmTime.TIME_BYTES)
{
throw new ArgumentException($"{nameof(NativeMethods.waveOutGetPosition)}: "
+ $"wType -> Expected {nameof(MmTime.TIME_BYTES)}, Received {time.Type}");
}
return(time.CB);
}
catch { throw; }
finally { Monitor.Exit(SyncLock); }
}
public static extern MmResult waveOutGetPosition(IntPtr hWaveOut, out MmTime mmTime, int uSize);
