public IOSAudioDriver( )
{
_engine = new AVAudioEngine();
_mixer = new AVAudioMixerNode();
_engine.AttachNode(_mixer);
_engine.Connect(_mixer, _engine.MainMixerNode, _engine.MainMixerNode.GetBusOutputFormat(0));
_players = new Player[MaxPlayers];
for (int i = 0; i < MaxPlayers; i++)
{
var player = new Player();
player.Callback = player.OnPlayedBack;
player.Done = true;
player.Node = new AVAudioPlayerNode();
player.PlayId = 1;
player.Id = (uint)i;
_players[i] = player;
_engine.AttachNode(player.Node);
//_engine.Connect(player.Node, _engine.MainMixerNode, _format);
}
_engine.Prepare();
_engine.StartAndReturnError(out var error);
}
private void initPlayer()
{
audioEngine = new AVAudioEngine();
NSError error = new NSError();
if (!AVAudioSession.SharedInstance().SetPreferredSampleRate(sampleRate, out error))
{
throw new Exception("Error setting preffered sample rate for player: " + error);
}
AVAudioSession.SharedInstance().SetCategory(AVAudioSessionCategory.PlayAndRecord, AVAudioSessionCategoryOptions.InterruptSpokenAudioAndMixWithOthers);
AVAudioSession.SharedInstance().SetActive(true);
audioPlayer = new AVAudioPlayerNode();
setVolume(AVAudioSession.SharedInstance().OutputVolume);
inputAudioFormat = new AVAudioFormat(AVAudioCommonFormat.PCMFloat32, sampleRate, (uint)channels, false);
audioEngine.AttachNode(audioPlayer);
audioEngine.Connect(audioPlayer, audioEngine.MainMixerNode, inputAudioFormat);
audioEngine.Prepare();
if (!audioEngine.StartAndReturnError(out error))
{
throw new Exception("Error starting playback audio engine: " + error);
}
audioPlayer.Play();
}
///<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);
}
public CoreMidiSynthesizer()
{
details = this;
_engine = new AVAudioEngine();
_sampler = new AVAudioUnitSampler();
_engine.AttachNode(_sampler);
_engine.Connect(_sampler, _engine.MainMixerNode, format: new AVAudioFormat(44100, 1));
LoadSoundFontIntoSampler(0);
AddObservers();
StartEngine();
SetSessionPlayback();
}
public SimplePlayEngine(Action componentsFoundCallback = null)
{
PresetList = new AUAudioUnitPreset [0];
this.componentsFoundCallback = componentsFoundCallback;
engine.AttachNode(player);
var fileUrl = NSBundle.MainBundle.GetUrlForResource("drumLoop", "caf");
if (fileUrl == null)
{
throw new NullReferenceException("drumploop.caf file not found");
}
SetPlayerFile(fileUrl);
if (componentsFoundCallback != null)
{
UpdateEffectsList();
AUAudioUnit.Notifications.ObserveAudioComponentRegistrationsChanged((sender, e) => UpdateEffectsList());
}
#if __IOS__
var error = AVAudioSession.SharedInstance().SetCategory(AVAudioSessionCategory.Playback);
if (error != null)
{
throw new NSErrorException(error);
}
#endif
AUAudioUnit.Notifications.ObserveAudioComponentInstanceInvalidation((sender, e) => {
var crashedAU = e.Notification.Object as AUAudioUnit;
if (AudioUnit == crashedAU)
{
SelectEffectWithComponentDescription(null, null);
}
});
}
void Init()
{
FrequenciesByOctave = new FrequencyDictionary();
for (int i = 0; i < InFlightAudioBuffers; i++)
{
var buffer = new AVAudioPcmBuffer(AudioFormat, SamplesPerBuffer);
AudioBuffers.Add(buffer);
}
PlayerNode = new AVAudioPlayerNode {
Volume = .8f
};
AudioEngine.AttachNode(PlayerNode);
AudioEngine.Connect(PlayerNode, AudioEngine.MainMixerNode, AudioFormat);
AudioEngine.StartAndReturnError(out var error);
}
public void AudioSetupStart()
{
FloatQueue = new Queue <float>();
engine = new AVAudioEngine();
nodeEQ = new AVAudioUnitEQ(1);
nodeEQ.GlobalGain = 1;
engine.AttachNode(nodeEQ);
AVAudioUnitEQFilterParameters filter = nodeEQ.Bands[0];
filter.FilterType = AVAudioUnitEQFilterType.LowPass;
filter.Frequency = 1000; //In hertz
filter.Bandwidth = 1;
filter.Bypass = false;
// in db -96 db through 24 d
filter.Gain = 50;
//not sure if this is necessary
nodeEQ.Bands[0] = filter;
//1
AVAudioFormat format2 = engine.MainMixerNode.GetBusOutputFormat(0);
//2
//AVAudioPcmBuffer buffMix = new AVAudioPcmBuffer(engine.MainMixerNode.GetBusInputFormat(0),2);
//AVAudioTime timeMix = engine.MainMixerNode.LastRenderTime;
//AVAudioNodeTapBlock MixerBlock = new AVAudioNodeTapBlock((buffMix, timeMix) =>
//2
engine.MainMixerNode.InstallTapOnBus(0, 1024, format2, (AVAudioPcmBuffer buffMix, AVAudioTime when) =>
{
//Console.WriteLine("Called");
//3 **Dont have an 'Updater' also not checking for null**
IntPtr channelData = buffMix.FloatChannelData;
int lengthOfBuffer = (int)buffMix.FrameLength;
int frame_length = (int)buffMix.FrameLength;
/*
* byte[] bytesArray = new byte[lengthOfBuffer];
*
* Marshal.Copy(channelData, bytesArray, 0, lengthOfBuffer);
*/
/*
* double total = 0;
* int nonZero = 0;
* for (int a = 0; a < buffMix.FrameLength - 4; a+=1)
* {
* //float tempx = BitConverter.ToSingle(bytesArray, a);
* float tempx = bytesArray[a];
* Console.WriteLine(tempx);
* double temp = Math.Pow(tempx, 2);
* total += temp;
* if (temp.Equals(0))
* nonZero++;
* }
* int tester;
* //Need to figure out how the buffer works, if at all
* total = Math.Sqrt(total / nonZero);
* double avgPower = 20 * Math.Log10(total);
* avgPower /= 160;
*
* if (avgPower > .9)
* High_Level_Detected++;
* FloatQueue.Enqueue((float)avgPower);
* //Console.WriteLine(avgPower);
*
* Marshal.FreeHGlobal(channelData);
*/
//var ns = buffMix.MutableCopy(); //test later
T_Proccess tws = new T_Proccess(channelData, lengthOfBuffer, frame_length);
Thread processer = new Thread(new ThreadStart(tws.ThreadProc));
processer.Start();
});
AVAudioFormat format = engine.InputNode.GetBusInputFormat(0);
engine.Connect(engine.InputNode, engine.MainMixerNode, format);
engine.Connect(nodeEQ, engine.MainMixerNode, format);
StartEngine();
started = true;
}