internal AudioOutput(IntPtr pointer)
{
_pointer = pointer;
if (pointer != IntPtr.Zero)
{
_struct =
(Interop.MediaPlayer.AudioOutput)
Marshal.PtrToStructure(pointer, typeof(Interop.MediaPlayer.AudioOutput));
Name = InteropHelper.PtrToString(_struct.Name);
Description = InteropHelper.PtrToString(_struct.Description);
}
}
/// <summary>
/// Configures an explicit audio output device. If the module paramater is NULL,
/// audio output will be moved to the device specified by the device identifier string immediately.
/// This is the recommended usage. A list of adequate potential device strings can be obtained with
/// <see cref="EnumAudioDeviceList" />.
/// However passing NULL is supported in LibVLC version 2.2.0 and later only; in earlier versions, this function would
/// have no effects when the module parameter was NULL.
/// If the module parameter is not NULL, the device parameter of the corresponding audio output, if it exists, will be
/// set to the specified string.
/// Note that some audio output modules do not have such a parameter (notably MMDevice and PulseAudio).
/// A list of adequate potential device strings can be obtained with <see cref="GetAudioDeviceList" />.
/// </summary>
public void SetAudioDevice(AudioOutput audioOutput, AudioDevice audioDevice)
{
var outputHandle = audioOutput == null ? null : new GCHandle?(InteropHelper.StringToPtr(audioOutput.Name));
var deviceHandle = InteropHelper.StringToPtr(audioDevice.Device);
_setAudioDeviceFunction.Delegate(InstancePointer,
outputHandle == null ? IntPtr.Zero : outputHandle.Value.AddrOfPinnedObject(),
deviceHandle.AddrOfPinnedObject());
if (outputHandle.HasValue)
{
outputHandle.Value.Free();
}
deviceHandle.Free();
}
/// <summary>
/// Selects an audio output module.
/// Any change will take be effect only after playback is stopped and restarted. Audio output cannot be changed while
/// playing.
/// </summary>
/// <param name="audioOutput"></param>
/// <returns></returns>
public bool SetAudioOutput(AudioOutput audioOutput)
{
var handle = InteropHelper.StringToPtr(audioOutput.Name);
var result = _setAudioOutputFunction.Delegate(InstancePointer, handle.AddrOfPinnedObject());
handle.Free();
return result == 0;
}
/// <summary>
/// Gets a list of audio output devices for a given audio output module.
/// </summary>
/// <param name="audioOutput"></param>
/// <returns></returns>
public AudioDeviceList GetAudioDeviceList(AudioOutput audioOutput)
{
var handle = InteropHelper.StringToPtr(audioOutput.Name);
var result =
new AudioDeviceList(_getAudioDeviceListFunction.Delegate(VlcInstance.InstancePointer,
handle.AddrOfPinnedObject()));
handle.Free();
return result;
}
