void prepareAudioUnit()
{
// AudioSession
AudioSession.Initialize();
AudioSession.SetActive(true);
AudioSession.Category = AudioSessionCategory.PlayAndRecord;
AudioSession.PreferredHardwareIOBufferDuration = 0.01f;
// Getting a RemoteUI AudioUni AudioComponent
_component = AudioComponent.FindComponent(AudioTypeOutput.Remote);
// Getting Audiounit
_audioUnit = AudioUnit.CreateInstance(_component);
// turning on microphone
_audioUnit.SetEnableIO(true,
AudioUnitScopeType.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,
AudioUnitScopeType.Input,
0 // Remote output
);
_audioUnit.SetAudioFormat(audioFormat,
AudioUnitScopeType.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);
// initialize
_audioUnit.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;
}
public static AudioUnit CreateInstance(AudioComponent cmp)
{
var ptr = new IntPtr();
int err = AudioComponentInstanceNew(cmp.Handler, ref ptr);
if (err != 0)
{
throw new ArgumentException(String.Format("Error code:", err));
}
if (ptr != IntPtr.Zero)
{
return(new AudioUnit(ptr));
}
else
{
return(null);
}
}
void prepareAudioUnit()
{
// Getting the RemoteUI AudioComponent
_component = AudioComponent.FindComponent(AudioTypeOutput.Remote);
// 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, AudioUnitScopeType.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);
}
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);
}
}
public static AudioUnit CreateInstance(AudioComponent cmp)
{
var ptr = new IntPtr();
int err = AudioComponentInstanceNew(cmp.Handler, ref ptr);
if (err != 0)
throw new ArgumentException(String.Format("Error code:", err));
if (ptr != IntPtr.Zero)
{
return new AudioUnit(ptr);
}
else
{
return null;
}
}
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();
}
void prepareAudioUnit()
{
// Getting Remote AudioComponent output
_audioComponent = AudioComponent.FindComponent(AudioTypeOutput.Remote);
// creating an audio unit instance
_audioUnit = AudioUnit.CreateInstance(_audioComponent);
// setting audio format
_audioUnit.SetAudioFormat(_dstFormat,
AudioUnitScopeType.Input,
0 // Remote Output
);
// setting callback method
_audioUnit.RenderCallback += new EventHandler<AudioUnitEventArgs>(_audioUnit_RenderCallback);
_audioUnit.Initialize();
}
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 prepareAudioUnit()
{
// AudioSession
AudioSession.Initialize();
AudioSession.SetActive(true);
AudioSession.Category = AudioSessionCategory.PlayAndRecord;
AudioSession.PreferredHardwareIOBufferDuration = 0.005f;
// Getting AudioComponent Remote output
_audioComponent = AudioComponent.FindComponent(AudioTypeOutput.Remote);
// creating an audio unit instance
_audioUnit = AudioUnit.CreateInstance(_audioComponent);
// turning on microphone
_audioUnit.SetEnableIO(true,
AudioUnitScopeType.Input,
1 // Remote Input
);
// setting audio format
_audioUnit.SetAudioFormat(_dstFormat,
AudioUnitScopeType.Input,
0 // Remote Output
);
_audioUnit.SetAudioFormat( AudioUnitUtils.AUCanonicalASBD(_sampleRate, 2),
AudioUnitScopeType.Output,
1 // Remote input
);
// setting callback method
_audioUnit.RenderCallback += new EventHandler<AudioUnitEventArgs>(_audioUnit_RenderCallback);
_audioUnit.Initialize();
_audioUnit.Start();
}
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();
}
void prepareAudioUnit ()
{
// AudioSession
AudioSession.Initialize ();
AudioSession.SetActive (true);
AudioSession.Category = AudioSessionCategory.PlayAndRecord;
AudioSession.PreferredHardwareIOBufferDuration = 0.005f;
// Getting AudioComponent Remote output
_audioComponent = AudioComponent.FindComponent (AudioTypeOutput.Remote);
// creating an audio unit instance
_audioUnit = new AudioUnit (_audioComponent);
// turning on microphone
_audioUnit.SetEnableIO (true,
AudioUnitScopeType.Input,
1 // Remote Input
);
// setting audio format
_audioUnit.SetAudioFormat (_dstFormat,
AudioUnitScopeType.Input,
0 // Remote Output
);
var format = AudioStreamBasicDescription.CreateLinearPCM (_sampleRate, bitsPerChannel: 32);
format.FormatFlags = AudioStreamBasicDescription.AudioFormatFlagsAudioUnitCanonical;
_audioUnit.SetAudioFormat (format, AudioUnitScopeType.Output, 1);
// setting callback method
_audioUnit.SetRenderCallback (_audioUnit_RenderCallback, AudioUnitScopeType.Global);
_audioUnit.Initialize ();
_audioUnit.Start ();
}
void prepareAudioUnit()
{
// Updated for deprecated AudioSession
var session = AVAudioSession.SharedInstance();
NSError error;
if (session == null)
{
var alert = new UIAlertView("Session error", "Unable to create audio session", null, "Cancel");
alert.Show();
alert.Clicked += delegate
{
alert.DismissWithClickedButtonIndex(0, true);
return;
};
}
session.SetActive(true);
session.SetCategory(AVAudioSessionCategory.PlayAndRecord);
session.SetPreferredIOBufferDuration(0.005, out error);
// Getting AudioComponent Remote output
_audioComponent = AudioComponent.FindComponent(AudioTypeOutput.Remote);
// creating an audio unit instance
_audioUnit = new AudioUnit(_audioComponent);
// turning on microphone
_audioUnit.SetEnableIO(true,
AudioUnitScopeType.Input,
1 // Remote Input
);
// setting audio format
_audioUnit.SetAudioFormat(_dstFormat,
AudioUnitScopeType.Input,
0 // Remote Output
);
var format = AudioStreamBasicDescription.CreateLinearPCM(_sampleRate, bitsPerChannel: 32);
format.FormatFlags = AudioStreamBasicDescription.AudioFormatFlagsNativeFloat;
_audioUnit.SetAudioFormat(format, AudioUnitScopeType.Output, 1);
// setting callback method
_audioUnit.SetRenderCallback(_audioUnit_RenderCallback, AudioUnitScopeType.Global);
_audioUnit.Initialize();
_audioUnit.Start();
}