/// <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>
/// Restarts the audio device.
/// </summary>
/// <param name="deviceHandle">The device handle.</param>
/// <exception cref="TimeoutException">Occurs when the interop lock cannot be acquired.</exception>
/// <exception cref="LegacyAudioException">Occurs when the MME interop call fails.</exception>
public static void RestartAudioDevice(IntPtr deviceHandle)
{
if (!TryEnterWaveOperation(deviceHandle))
{
return;
}
try
{
LegacyAudioException.Try(
NativeMethods.RestartPlayback(deviceHandle),
nameof(NativeMethods.RestartPlayback));
}
finally { Monitor.Exit(SyncLock); }
}
/// <summary>
/// Writes the audio data.
/// </summary>
/// <param name="deviceHandle">The device handle.</param>
/// <param name="header">The header.</param>
/// <exception cref="TimeoutException">Occurs when the interop lock cannot be acquired.</exception>
/// <exception cref="LegacyAudioException">Occurs when the MME interop call fails.</exception>
public static void WriteAudioData(IntPtr deviceHandle, WaveHeader header)
{
if (header == null || !TryEnterWaveOperation(deviceHandle))
{
return;
}
try
{
LegacyAudioException.Try(
NativeMethods.WriteWaveAudioData(deviceHandle, header, Marshal.SizeOf(header)),
nameof(NativeMethods.WriteWaveAudioData));
}
finally { Monitor.Exit(SyncLock); }
}
