/// <summary>
/// Overridable Dispose
/// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
/// </summary>
/// <param name="disposing">Disposing flag</param>
protected virtual void Dispose(bool disposing)
{
if (!disposedValue)
{
if (disposing)
{
// dispose managed state (managed objects)
// cleanup existing items
_synthesizer?.Dispose( );
_mediaSourceInputNode?.RemoveOutgoingConnection(_deviceOutputNode);
_mediaSourceInputNode?.Dispose( );
_deviceOutputNode?.Dispose( );
_audioGraph?.Dispose( );
}
disposedValue = true;
}
}
// Init the AudioGraph
// despite the Aync methods - this will exec synchronously to get the InitPhase only get done when all is available
private void InitAudioGraph( )
{
LOG.Log("InitAudioGraph: Begin");
if (!_canSpeak)
{
LOG.Log("InitAudioGraph: Canceled with _canSpeak = false");
return; // cannot even try..
}
// MUST WAIT UNTIL all items are created, else one may call Speak too early...
// cleanup existing items
if (_mediaSourceInputNode != null)
{
if (_deviceOutputNode != null)
{
_mediaSourceInputNode.RemoveOutgoingConnection(_deviceOutputNode);
}
_mediaSourceInputNode.Dispose( );
_mediaSourceInputNode = null;
}
if (_deviceOutputNode != null)
{
_deviceOutputNode.Dispose( ); _deviceOutputNode = null;
}
if (_audioGraph != null)
{
_audioGraph.Dispose( ); _audioGraph = null;
}
// Create an AudioGraph
AudioGraphSettings settings = new AudioGraphSettings(_renderCat)
{
PrimaryRenderDevice = null, // If PrimaryRenderDevice is null, the default playback device will be used.
};
// We await here the execution without providing an async method ...
var resultAG = WindowsRuntimeSystemExtensions.AsTask(AudioGraph.CreateAsync(settings));
resultAG.Wait( );
if (resultAG.Result.Status != AudioGraphCreationStatus.Success)
{
LOG.LogError($"InitAudioGraph: Failed to create AudioGraph with RenderCategory: {_renderCat}");
LOG.LogError($"InitAudioGraph: AudioGraph creation: {resultAG.Result.Status}, TaskStatus: {resultAG.Status}"
+ $"\nExtError: {resultAG.Result.ExtendedError}");
_canSpeak = false;
return;
}
_audioGraph = resultAG.Result.Graph;
LOG.Log($"InitAudioGraph: AudioGraph: [{_audioGraph.EncodingProperties}]");
// Create a device output node
// The output node uses the PrimaryRenderDevice of the audio graph.
// We await here the execution without providing an async method ...
var resultDO = WindowsRuntimeSystemExtensions.AsTask(_audioGraph.CreateDeviceOutputNodeAsync());
resultDO.Wait( );
if (resultDO.Result.Status != AudioDeviceNodeCreationStatus.Success)
{
// Cannot create device output node
LOG.LogError($"InitAudioGraph: DeviceOutputNode creation: {resultDO.Result.Status}, TaskStatus: {resultDO.Status}"
+ $"\nExtError: {resultDO.Result.ExtendedError}");
_canSpeak = false;
return;
}
_deviceOutputNode = resultDO.Result.DeviceOutputNode;
LOG.Log($"InitAudioGraph: DeviceOutputNode: [{_deviceOutputNode.Device}]");
LOG.Log($"InitAudioGraph: InitAudioGraph-END");
}