bool createAUGraph ()
{
AUGraphError result = 0;
int samplerNode, ioNode;
var cd = new AudioComponentDescription () {
ComponentManufacturer = AudioComponentManufacturerType.Apple,
ComponentFlags = 0,
ComponentFlagsMask = 0
};
processingGraph = new AUGraph ();
cd.ComponentType = AudioComponentType.MusicDevice;
cd.ComponentSubType = (int)AudioTypeMusicDevice.Sampler; //0x73616d70;
samplerNode = processingGraph.AddNode (cd);
cd.ComponentType = AudioComponentType.Output;
cd.ComponentSubType = (int)AudioTypeOutput.Remote; //0x72696f63;
ioNode = processingGraph.AddNode (cd);
processingGraph.Open ();
result = processingGraph.ConnnectNodeInput (samplerNode, 0, ioNode, 0);
if (result != AUGraphError.OK)
throw new Exception ("Unable to open the audio processing graph. Error code: " + result);
samplerUnit = processingGraph.GetNodeInfo (samplerNode);
ioUnit = processingGraph.GetNodeInfo (ioNode);
return true;
}
bool CreateAUGraph ()
{
processingGraph = new AUGraph ();
int samplerNode, ioNode;
var musicSampler = new AudioComponentDescription () {
ComponentManufacturer = AudioComponentManufacturerType.Apple,
ComponentType = AudioComponentType.MusicDevice,
ComponentSubType = (int)AudioTypeMusicDevice.Sampler
};
samplerNode = processingGraph.AddNode (musicSampler);
var remoteOutput = new AudioComponentDescription () {
ComponentManufacturer = AudioComponentManufacturerType.Apple,
ComponentType = AudioComponentType.Output,
ComponentSubType = (int)AudioTypeOutput.Remote
};
ioNode = processingGraph.AddNode (remoteOutput);
processingGraph.Open ();
processingGraph.ConnnectNodeInput (
sourceNode: samplerNode,
sourceOutputNumber: 0,
destNode: ioNode,
destInputNumber: 0);
samplerUnit = processingGraph.GetNodeInfo (samplerNode);
ioUnit = processingGraph.GetNodeInfo (ioNode);
return true;
}
public int AddNode(AudioComponentDescription cd)
{
int node = 0;
int err = AUGraphAddNode(_auGraph, cd, ref node);
if (err != 0)
throw new ArgumentException(String.Format("Error code:", err));
return node;
}
void prepareAUGraph()
{
// Creating audio graph instance
_auGraph = AUGraph.CreateInstance();
// getting audio node and audio unit
AudioComponentDescription cd = new AudioComponentDescription()
{
componentType = AudioComponentDescription.AudioComponentType.kAudioUnitType_Output,
componentSubType = AudioComponentDescription.AudioComponentSubType.kAudioUnitSubType_RemoteIO,
componentManufacturer = AudioComponentDescription.AudioComponentManufacturerType.kAudioUnitManufacturer_Apple,
componentFlags = 0,
componentFlagsMask = 0
};
int remoteIONode = _auGraph.AddNode(cd);
AudioUnit remoteIOUnit = _auGraph.GetNodeInfo(remoteIONode);
// turning on microphone
remoteIOUnit.SetEnableIO(true,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input,
1 // remote input
);
// audio canonical format
AudioStreamBasicDescription audioFormat = CanonicalASBD(44100, 1);
remoteIOUnit.SetAudioFormat(audioFormat,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Output, // output bus of Remote input
1 // Remote input
);
remoteIOUnit.SetAudioFormat(audioFormat,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input,
0 // Remote output,
);
// Connecting Remote Input to Remote Output
_auGraph.ConnnectNodeInput(
remoteIONode, 1,
remoteIONode, 0);
// getting output audio format
_audioUnitOutputFormat = remoteIOUnit.GetAudioFormat(
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Output, // Remote output bus
0 // Remote output
);
_auGraph.RenderCallback += new EventHandler<AudioGraphEventArgs>(_auGraph_RenderCallback);
// graph initialization
_auGraph.Initialize();
}
public static AudioComponent FindNextComponent(AudioComponent cmp, AudioComponentDescription cd)
{
// Getting component hanlder
IntPtr handler;
if (cmp == null)
handler = AudioComponentFindNext(IntPtr.Zero, cd);
else
handler = AudioComponentFindNext(cmp.Handler, cd);
// creating an instance
if (handler != IntPtr.Zero)
return new AudioComponent(handler);
else
return null;
}
static extern IntPtr AudioComponentFindNext(IntPtr inComponent, AudioComponentDescription inDesc);
public static AudioComponent FindComponent(AudioComponentDescription cd)
{
return(FindNextComponent(null, cd));
}
void prepareAudioUnit()
{
// AudioSession
AudioSession.Initialize();
AudioSession.SetActive(true);
AudioSession.Category = AudioSessionCategory.PlayAndRecord;
AudioSession.PreferredHardwareIOBufferDuration = 0.01f;
// Creating AudioComponentDescription instance of RemoteIO Audio Unit
var cd = new AudioComponentDescription()
{
componentType = AudioComponentDescription.AudioComponentType.kAudioUnitType_Output,
componentSubType = AudioComponentDescription.AudioComponentSubType.kAudioUnitSubType_RemoteIO,
componentManufacturer = AudioComponentDescription.AudioComponentManufacturerType.kAudioUnitManufacturer_Apple,
componentFlags = 0,
componentFlagsMask = 0
};
// Getting AudioComponent from the description
_component = AudioComponent.FindComponent(cd);
// Getting Audiounit
_audioUnit = AudioUnit.CreateInstance(_component);
// turning on microphone
_audioUnit.SetEnableIO(true,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input,
1 // Remote Input
);
// setting AudioStreamBasicDescription
int AudioUnitSampleTypeSize = (MonoTouch.ObjCRuntime.Runtime.Arch == MonoTouch.ObjCRuntime.Arch.SIMULATOR) ? sizeof(float) : sizeof(uint);
AudioStreamBasicDescription audioFormat = new AudioStreamBasicDescription()
{
SampleRate = _sampleRate,
Format = AudioFormatType.LinearPCM,
//kAudioFormatFlagsAudioUnitCanonical = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsPacked | kAudioFormatFlagIsNonInterleaved | (kAudioUnitSampleFractionBits << kLinearPCMFormatFlagsSampleFractionShift),
FormatFlags = (AudioFormatFlags)((int)AudioFormatFlags.IsSignedInteger | (int)AudioFormatFlags.IsPacked | (int)AudioFormatFlags.IsNonInterleaved | (int)(kAudioUnitSampleFractionBits << (int)AudioFormatFlags.LinearPCMSampleFractionShift)),
ChannelsPerFrame = 2,
BytesPerPacket = AudioUnitSampleTypeSize,
BytesPerFrame = AudioUnitSampleTypeSize,
FramesPerPacket = 1,
BitsPerChannel = 8 * AudioUnitSampleTypeSize,
Reserved = 0
};
_audioUnit.SetAudioFormat(audioFormat,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input,
0 // Remote output
);
_audioUnit.SetAudioFormat(audioFormat,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Output,
1 // Remote input
);
// setting callback
/*
if (MonoTouch.ObjCRuntime.Runtime.Arch == MonoTouch.ObjCRuntime.Arch.SIMULATOR)
_audioUnit.RenderCallback += new EventHandler<AudioUnitEventArgs>(simulator_callback);
else
_audioUnit.RenderCallback += new EventHandler<AudioUnitEventArgs>(device_callback);
*/
_audioUnit.RenderCallback += new EventHandler<AudioUnitEventArgs>(_callback);
// initialize
_audioUnit.Initialize();
}
static extern int AUGraphAddNode(IntPtr inGraph, AudioComponentDescription inDescription, ref int outNode);
void prepareAudioUnit()
{
// creating an AudioComponentDescription of the RemoteIO AudioUnit
AudioComponentDescription cd = new AudioComponentDescription()
{
componentType = AudioComponentDescription.AudioComponentType.kAudioUnitType_Output,
componentSubType = AudioComponentDescription.AudioComponentSubType.kAudioUnitSubType_RemoteIO,
componentManufacturer = AudioComponentDescription.AudioComponentManufacturerType.kAudioUnitManufacturer_Apple,
componentFlags = 0,
componentFlagsMask = 0
};
// Getting AudioComponent using the audio component description
_audioComponent = AudioComponent.FindComponent(cd);
// creating an audio unit instance
_audioUnit = AudioUnit.CreateInstance(_audioComponent);
// setting audio format
_audioUnit.SetAudioFormat(_dstFormat,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input,
0 // Remote Output
);
// setting callback method
_audioUnit.RenderCallback += new EventHandler<AudioUnitEventArgs>(_audioUnit_RenderCallback);
_audioUnit.Initialize();
}
static extern int AUGraphAddNode(IntPtr inGraph, AudioComponentDescription inDescription, ref int outNode);
void prepareAudioUnit()
{
// Creating AudioComponentDescription instance of RemoteIO Audio Unit
AudioComponentDescription cd = new AudioComponentDescription()
{
componentType = AudioComponentDescription.AudioComponentType.kAudioUnitType_Output,
componentSubType = AudioComponentDescription.AudioComponentSubType.kAudioUnitSubType_RemoteIO,
componentManufacturer = AudioComponentDescription.AudioComponentManufacturerType.kAudioUnitManufacturer_Apple,
componentFlags = 0,
componentFlagsMask = 0
};
// Getting AudioComponent from the description
_component = AudioComponent.FindComponent(cd);
// Getting Audiounit
_audioUnit = AudioUnit.CreateInstance(_component);
// setting AudioStreamBasicDescription
int AudioUnitSampleTypeSize;
if (MonoTouch.ObjCRuntime.Runtime.Arch == MonoTouch.ObjCRuntime.Arch.SIMULATOR)
{
AudioUnitSampleTypeSize = sizeof(float);
}
else
{
AudioUnitSampleTypeSize = sizeof(int);
}
AudioStreamBasicDescription audioFormat = new AudioStreamBasicDescription()
{
SampleRate = _sampleRate,
Format = AudioFormatType.LinearPCM,
//kAudioFormatFlagsAudioUnitCanonical = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagsNativeEndian | kAudioFormatFlagIsPacked | kAudioFormatFlagIsNonInterleaved | (kAudioUnitSampleFractionBits << kLinearPCMFormatFlagsSampleFractionShift),
FormatFlags = (AudioFormatFlags)((int)AudioFormatFlags.IsSignedInteger | (int)AudioFormatFlags.IsPacked | (int)AudioFormatFlags.IsNonInterleaved | (int)(kAudioUnitSampleFractionBits << (int)AudioFormatFlags.LinearPCMSampleFractionShift)),
ChannelsPerFrame = 2,
BytesPerPacket = AudioUnitSampleTypeSize,
BytesPerFrame = AudioUnitSampleTypeSize,
FramesPerPacket = 1,
BitsPerChannel = 8 * AudioUnitSampleTypeSize,
Reserved = 0
};
_audioUnit.SetAudioFormat(audioFormat, AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input, 0);
// setting callback
/*
if (MonoTouch.ObjCRuntime.Runtime.Arch == MonoTouch.ObjCRuntime.Arch.SIMULATOR)
_audioUnit.RenderCallback += new EventHandler<AudioUnitEventArgs>(simulator_callback);
else
_audioUnit.RenderCallback += new EventHandler<AudioUnitEventArgs>(device_callback);
* */
_audioUnit.RenderCallback += new EventHandler<AudioUnitEventArgs>(device_callback);
}
void prepareAudioUnit()
{
// AudioSession
AudioSession.Initialize();
AudioSession.SetActive(true);
AudioSession.Category = AudioSessionCategory.PlayAndRecord;
AudioSession.PreferredHardwareIOBufferDuration = 0.005f;
// creating an AudioComponentDescription of the RemoteIO AudioUnit
AudioComponentDescription cd = new AudioComponentDescription()
{
componentType = AudioComponentDescription.AudioComponentType.kAudioUnitType_Output,
componentSubType = AudioComponentDescription.AudioComponentSubType.kAudioUnitSubType_RemoteIO,
componentManufacturer = AudioComponentDescription.AudioComponentManufacturerType.kAudioUnitManufacturer_Apple,
componentFlags = 0,
componentFlagsMask = 0
};
// Getting AudioComponent using the audio component description
_audioComponent = AudioComponent.FindComponent(cd);
// creating an audio unit instance
_audioUnit = AudioUnit.CreateInstance(_audioComponent);
// turning on microphone
_audioUnit.SetEnableIO(true,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input,
1 // Remote Input
);
// setting audio format
_audioUnit.SetAudioFormat(_dstFormat,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input,
0 // Remote Output
);
_audioUnit.SetAudioFormat( AudioUnitUtils.AUCanonicalASBD(_sampleRate, 2),
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Output,
1 // Remote input
);
// setting callback method
_audioUnit.RenderCallback += new EventHandler<AudioUnitEventArgs>(_audioUnit_RenderCallback);
_audioUnit.Initialize();
_audioUnit.Start();
}
static extern int AUGraphNodeInfo(IntPtr inGraph, int inNode, AudioComponentDescription outDescription, IntPtr outAudioUnit);
public static AudioComponent FindComponent(AudioComponentDescription cd)
{
return FindNextComponent(null, cd);
}
static extern int AUGraphNodeInfo(IntPtr inGraph, int inNode, AudioComponentDescription outDescription, IntPtr outAudioUnit);
static extern IntPtr AudioComponentFindNext(IntPtr inComponent, AudioComponentDescription inDesc);
void prepareAudioUnit()
{
// Creating AudioComponentDescription instance of RemoteIO Audio Unit
var cd = new AudioComponentDescription()
{
componentType = AudioComponentDescription.AudioComponentType.kAudioUnitType_Output,
componentSubType = AudioComponentDescription.AudioComponentSubType.kAudioUnitSubType_RemoteIO,
componentManufacturer = AudioComponentDescription.AudioComponentManufacturerType.kAudioUnitManufacturer_Apple,
componentFlags = 0,
componentFlagsMask = 0
};
// Getting AudioComponent from the description
_component = AudioComponent.FindComponent(cd);
// Getting Audiounit
_audioUnit = AudioUnit.CreateInstance(_component);
// turning on microphone
_audioUnit.SetEnableIO(true,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input,
1 // Remote Input
);
// setting AudioStreamBasicDescription
var audioFormat = AudioUnitUtils.AUCanonicalASBD(44100.0, 2);
_audioUnit.SetAudioFormat(audioFormat,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input,
0 // Remote output
);
_audioUnit.SetAudioFormat(audioFormat,
AudioUnit.AudioUnitScopeType.kAudioUnitScope_Output,
1 // Remote input
);
// setting callback
_audioUnit.RenderCallback += new EventHandler<AudioUnitEventArgs>(_audioUnit_RenderCallback);
// initialize
_audioUnit.Initialize();
}
void prepareAUGraph()
{
// Creating audio graph instance
_auGraph = AUGraph.CreateInstance();
// Adding Remote IO node to AUGraph
AudioComponentDescription cd = new AudioComponentDescription()
{
componentType = AudioComponentDescription.AudioComponentType.kAudioUnitType_Output,
componentSubType = AudioComponentDescription.AudioComponentSubType.kAudioUnitSubType_RemoteIO,
componentManufacturer = AudioComponentDescription.AudioComponentManufacturerType.kAudioUnitManufacturer_Apple,
componentFlags = 0,
componentFlagsMask = 0
};
int remoteIONode = _auGraph.AddNode(cd);
// Preparing AudioComponentDescrption of MultiChannelMixer
cd.componentType = AudioComponentDescription.AudioComponentType.kAudioUnitType_Mixer;
cd.componentSubType = AudioComponentDescription.AudioComponentSubType.kAudioUnitSubType_MultiChannelMixer;
int multiChannelMixerNode = _auGraph.AddNode(cd);
// Setting callback method as the case of Audio Unit
for (int i = 0; i < _waveDef.Length; i++)
{
var callbackStruct = new AudioUnit.AURenderCallbackStrct();
callbackStruct.inputProc = device_renderCallback; // setting callback function
callbackStruct.inputProcRefCon = GCHandle.ToIntPtr(_handle); // a pointer that passed to the renderCallback (IntPtr inRefCon)
_auGraph.AUGraphSetNodeInputCallback(
multiChannelMixerNode,
(uint)i, // bus number
callbackStruct);
}
var remoteIOAudioUnit = _auGraph.GetNodeInfo(remoteIONode);
var multiChannelMixerAudioUnit = _auGraph.GetNodeInfo(multiChannelMixerNode);
// Getting an AudioUnit canonical description
var audioFormat = AudioUnitUtils.AUCanonicalASBD(44100.0, 2);
// applying the audio format to each audio units
remoteIOAudioUnit.SetAudioFormat(audioFormat, AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input, 0);
multiChannelMixerAudioUnit.SetAudioFormat(audioFormat, AudioUnit.AudioUnitScopeType.kAudioUnitScope_Input, 0);
// connecting multiChannelMixerNode(bus:0) to remoteIONode(bus:0)
_auGraph.ConnnectNodeInput(
multiChannelMixerNode,
0, // output bus
remoteIONode,
0 // input bus
);
// graph initialization
_auGraph.Initialize();
}
void SetupRemoteIO()
{
AudioComponentDescription desc = new AudioComponentDescription ();
desc.ComponentType = AudioComponentType.Output;
desc.ComponentSubType = 0x72696f63;
desc.ComponentManufacturer = AudioComponentManufacturerType.Apple;
desc.ComponentFlags = 0;
desc.ComponentFlagsMask = 0;
var component = AudioComponent.FindNextComponent (null, desc);
rioUnit = new AudioUnit (component);
rioUnit.SetEnableIO (true, AudioUnitScopeType.Input, 1);
rioUnit.SetRenderCallback (renderDelegate, AudioUnitScopeType.Input, 0);
audioFormat = new AudioStreamBasicDescription();
audioFormat.Format = AudioFormatType.LinearPCM;
audioFormat.SampleRate = sampleRate;
audioFormat.ChannelsPerFrame = 2;
audioFormat.FramesPerPacket = 1;
audioFormat.BitsPerChannel = 8 * sizeof(int);
audioFormat.BytesPerPacket = sizeof(int);
audioFormat.BytesPerFrame = sizeof(int);
audioFormat.FormatFlags = AudioStreamBasicDescription.AudioFormatFlagsAudioUnitCanonical;
rioUnit.SetAudioFormat (audioFormat, AudioUnitScopeType.Input, 0);
rioUnit.SetAudioFormat (audioFormat, AudioUnitScopeType.Output, 1);
rioUnit.Initialize ();
unitCreated = true;
FFTBufferManager = new FFTBufferManager (maxFPS, this);
FFTBufferManager.Setup ();
rioUnit.Start ();
unitIsRunning = true;
}
