///<Summary>
/// Load wave or mp3 audio file from the Android assets folder
///</Summary>
public bool Load(string fileName)
{
DeletePlayer();
NSError error = new NSError();
if (!String.IsNullOrWhiteSpace(fileName))
{
string directory = Path.GetDirectoryName(fileName);
string filename = Path.GetFileNameWithoutExtension(fileName);
string extension = Path.GetExtension(fileName).Substring(1);
NSUrl url = NSBundle.MainBundle.GetUrlForResource(filename, extension, directory);
audioFile = new AVAudioFile(url, out error);
}
if (audioFile != null)
{
componentDescription = new AudioComponentDescription();
componentDescription.ComponentType = AudioComponentType.FormatConverter;
componentDescription.ComponentSubType = (int)AudioUnitSubType.Varispeed;
engine = new AVAudioEngine();
player = new AVAudioPlayerNode();
pitch = new AVAudioUnitTimePitch(componentDescription);
engine.AttachNode(player);
engine.AttachNode(pitch);
engine.Connect(player, pitch, audioFile.ProcessingFormat);
engine.Connect(pitch, engine.MainMixerNode, audioFile.ProcessingFormat);
engine.Prepare();
NSError startError = new NSError();
engine.StartAndReturnError(out startError);
}
return(true);
}
void DeletePlayer()
{
Stop();
if (player != null && player.Playing)
{
player.Stop();
}
if (engine != null && engine.Running)
{
engine.Stop();
}
if (player != null && engine != null && pitch != null)
{
engine.Dispose();
player.Dispose();
pitch.Dispose();
engine = null;
player = null;
pitch = null;
}
}