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AudioUnit.cs
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AudioUnit.cs
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//
// AudioUnit.cs: AudioUnit wrapper class
//
// Authors:
// AKIHIRO Uehara (u-akihiro@reinforce-lab.com)
// Marek Safar (marek.safar@gmail.com)
//
// Copyright 2010 Reinforce Lab.
// Copyright 2011-2013 Xamarin Inc
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#nullable enable
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Threading;
using AudioToolbox;
using ObjCRuntime;
using CoreFoundation;
using Foundation;
#if !NET
using NativeHandle = System.IntPtr;
#endif
namespace AudioUnit {
#if !COREBUILD
#if NET
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("macos")]
[SupportedOSPlatform ("tvos")]
#endif
public class AudioUnitException : Exception {
static string Lookup (int k)
{
switch ((AudioUnitStatus) k) {
case AudioUnitStatus.InvalidProperty:
return "Invalid Property";
case AudioUnitStatus.InvalidParameter:
return "Invalid Parameter";
case AudioUnitStatus.InvalidElement:
return "Invalid Element";
case AudioUnitStatus.NoConnection:
return "No Connection";
case AudioUnitStatus.FailedInitialization:
return "Failed Initialization";
case AudioUnitStatus.TooManyFramesToProcess:
return "Too Many Frames To Process";
case AudioUnitStatus.InvalidFile:
return "Invalid File";
case AudioUnitStatus.FormatNotSupported:
return "Format Not Supported";
case AudioUnitStatus.Uninitialized:
return "Uninitialized";
case AudioUnitStatus.InvalidScope:
return "Invalid Scope";
case AudioUnitStatus.PropertyNotWritable:
return "Property Not Writable";
case AudioUnitStatus.CannotDoInCurrentContext:
return "Cannot Do In Current Context";
case AudioUnitStatus.InvalidPropertyValue:
return "Invalid Property Value";
case AudioUnitStatus.PropertyNotInUse:
return "Property Not In Use";
case AudioUnitStatus.Initialized:
return "Initialized";
case AudioUnitStatus.InvalidOfflineRender:
return "Invalid Offline Render";
case AudioUnitStatus.Unauthorized:
return "Unauthorized";
}
return String.Format ("Unknown error code: 0x{0:x}", k);
}
internal AudioUnitException (AudioUnitStatus status)
: this ((int) status)
{
}
internal AudioUnitException (int k) : base (Lookup (k))
{
}
}
public delegate AudioUnitStatus RenderDelegate (AudioUnitRenderActionFlags actionFlags, AudioTimeStamp timeStamp, uint busNumber, uint numberFrames, AudioBuffers data);
public delegate AudioUnitStatus InputDelegate (AudioUnitRenderActionFlags actionFlags, AudioTimeStamp timeStamp, uint busNumber, uint numberFrames, AudioUnit audioUnit);
delegate AudioUnitStatus CallbackShared (IntPtr /* void* */ clientData, ref AudioUnitRenderActionFlags /* AudioUnitRenderActionFlags* */ actionFlags, ref AudioTimeStamp /* AudioTimeStamp* */ timeStamp, uint /* UInt32 */ busNumber, uint /* UInt32 */ numberFrames, IntPtr /* AudioBufferList* */ data);
#endif // !COREBUILD
#if NET
[StructLayout (LayoutKind.Sequential)]
unsafe struct AURenderCallbackStruct
{
#if COREBUILD
public delegate* unmanaged<IntPtr, int*, AudioTimeStamp*, uint, uint, IntPtr, int> Proc;
#else
public delegate* unmanaged<IntPtr, AudioUnitRenderActionFlags*, AudioTimeStamp*, uint, uint, IntPtr, AudioUnitStatus> Proc;
#endif
public IntPtr ProcRefCon;
}
#else
[StructLayout (LayoutKind.Sequential)]
struct AURenderCallbackStruct {
public IntPtr Proc;
public IntPtr ProcRefCon;
}
#endif
[StructLayout (LayoutKind.Sequential)]
struct AudioUnitConnection {
public IntPtr SourceAudioUnit;
public uint /* UInt32 */ SourceOutputNumber;
public uint /* UInt32 */ DestInputNumber;
}
#if NET
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("macos")]
[SupportedOSPlatform ("tvos")]
#endif
public class SamplerInstrumentData {
#if !COREBUILD
public const byte DefaultPercussionBankMSB = 0x78;
public const byte DefaultMelodicBankMSB = 0x79;
public const byte DefaultBankLSB = 0x00;
public SamplerInstrumentData (CFUrl fileUrl, InstrumentType instrumentType)
{
if (fileUrl is null)
ObjCRuntime.ThrowHelper.ThrowArgumentNullException (nameof (fileUrl));
this.FileUrl = fileUrl;
this.InstrumentType = instrumentType;
}
public CFUrl FileUrl { get; private set; }
public InstrumentType InstrumentType { get; private set; }
public byte BankMSB { get; set; }
public byte BankLSB { get; set; }
public byte PresetID { get; set; }
internal AUSamplerInstrumentData ToStruct ()
{
var data = new AUSamplerInstrumentData ();
data.FileUrl = FileUrl.Handle;
data.InstrumentType = InstrumentType;
data.BankMSB = BankMSB;
data.BankLSB = BankLSB;
data.PresetID = PresetID;
return data;
}
#endif // !COREBUILD
}
[StructLayout (LayoutKind.Sequential)]
struct AUSamplerInstrumentData {
public IntPtr FileUrl;
#if COREBUILD
// keep structure size identical across builds
public byte InstrumentType;
#else
public InstrumentType InstrumentType;
#endif // !COREBUILD
public byte BankMSB;
public byte BankLSB;
public byte PresetID;
}
[StructLayout (LayoutKind.Sequential)]
unsafe struct AudioUnitParameterInfoNative // AudioUnitParameterInfo in Obj-C
{
fixed byte /* char[52] */ name [52]; // unused
public IntPtr /* CFStringRef */ UnitName;
#if COREBUILD
// keep structure size identical across builds
public uint ClumpID;
#else
public AudioUnitClumpID /* UInt32 */ ClumpID;
#endif // !COREBUILD
public IntPtr /* CFStringRef */ NameString;
#if COREBUILD
// keep structure size identical across builds
public uint Unit;
#else
public AudioUnitParameterUnit /* AudioUnitParameterUnit */ Unit;
#endif // !COREBUILD
public float /* AudioUnitParameterValue = Float32 */ MinValue;
public float /* AudioUnitParameterValue = Float32 */ MaxValue;
public float /* AudioUnitParameterValue = Float32 */ DefaultValue;
#if COREBUILD
// keep structure size identical across builds
public uint Flags;
#else
public AudioUnitParameterFlag /* UInt32 */ Flags;
#endif // !COREBUILD
}
#if NET
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("macos")]
[SupportedOSPlatform ("tvos")]
#endif
public class AudioUnitParameterInfo {
#if !COREBUILD
public string? UnitName { get; private set; }
public AudioUnitClumpID ClumpID { get; private set; }
public string? Name { get; private set; }
public AudioUnitParameterUnit Unit { get; private set; }
public float MinValue { get; private set; }
public float MaxValue { get; private set; }
public float DefaultValue { get; private set; }
public AudioUnitParameterFlag Flags { get; private set; }
public AudioUnitParameterType Type { get; private set; }
internal static AudioUnitParameterInfo Create (AudioUnitParameterInfoNative native, AudioUnitParameterType type)
{
var info = new AudioUnitParameterInfo ();
// Remove obj-c noise
info.Flags = native.Flags & ~(AudioUnitParameterFlag.HasCFNameString | AudioUnitParameterFlag.CFNameRelease);
info.Unit = native.Unit;
info.MinValue = native.MinValue;
info.MaxValue = native.MaxValue;
info.DefaultValue = native.DefaultValue;
info.ClumpID = native.ClumpID;
info.Type = type;
if ((native.Flags & AudioUnitParameterFlag.HasCFNameString) != 0) {
info.Name = CFString.FromHandle (native.NameString);
if ((native.Flags & AudioUnitParameterFlag.CFNameRelease) != 0)
CFObject.CFRelease (native.NameString);
}
if (native.Unit == AudioUnitParameterUnit.CustomUnit) {
info.UnitName = CFString.FromHandle (native.UnitName);
}
return info;
}
#endif // !COREBUILD
}
public enum AUParameterEventType : uint {
Immediate = 1,
Ramped = 2,
}
#if NET
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("macos")]
[SupportedOSPlatform ("tvos")]
#endif
[StructLayout (LayoutKind.Sequential)]
public struct AudioUnitParameterEvent {
public uint Scope;
public uint Element;
public uint Parameter;
public AUParameterEventType EventType;
#if NET
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("macos")]
[SupportedOSPlatform ("tvos")]
#endif
[StructLayout (LayoutKind.Explicit)]
public struct EventValuesStruct {
[StructLayout (LayoutKind.Sequential)]
public struct RampStruct {
public int StartBufferOffset;
public uint DurationInFrames;
public float StartValue;
public float EndValue;
}
[FieldOffset (0)]
public RampStruct Ramp;
[StructLayout (LayoutKind.Sequential)]
public struct ImmediateStruct {
public uint BufferOffset;
public float Value;
}
[FieldOffset (0)]
public ImmediateStruct Immediate;
}
public EventValuesStruct EventValues;
}
#if NET
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("macos")]
[SupportedOSPlatform ("tvos")]
#endif
public class AudioUnit : DisposableObject {
#if !COREBUILD
#if !NET
static readonly CallbackShared CreateRenderCallback = RenderCallbackImpl;
static readonly CallbackShared CreateInputCallback = InputCallbackImpl;
#endif
GCHandle gcHandle;
bool _isPlaying;
Dictionary<uint, RenderDelegate>? renderer;
Dictionary<uint, InputDelegate>? inputs;
[Preserve (Conditional = true)]
internal AudioUnit (NativeHandle handle, bool owns)
: base (handle, owns)
{
}
static IntPtr Create (AudioComponent component)
{
if (component is null)
ObjCRuntime.ThrowHelper.ThrowArgumentNullException (nameof (component));
IntPtr handle;
AudioUnitStatus err;
unsafe {
err = AudioComponentInstanceNew (component.GetCheckedHandle (), &handle);
}
if (err != 0)
throw new AudioUnitException (err);
return handle;
}
public AudioUnit (AudioComponent component)
: this (Create (component), true)
{
}
public AudioComponent Component {
get {
return new AudioComponent (AudioComponentInstanceGetComponent (Handle), false);
}
}
public bool IsPlaying { get { return _isPlaying; } }
public unsafe AudioUnitStatus SetFormat (AudioToolbox.AudioStreamBasicDescription audioFormat, AudioUnitScopeType scope, uint audioUnitElement = 0)
{
return (AudioUnitStatus) AudioUnitSetProperty (Handle,
AudioUnitPropertyIDType.StreamFormat,
scope,
audioUnitElement,
&audioFormat,
(uint) Marshal.SizeOf<AudioToolbox.AudioStreamBasicDescription> ());
}
public uint GetCurrentDevice (AudioUnitScopeType scope, uint audioUnitElement = 0)
{
uint device = 0;
int size = sizeof (uint);
AudioUnitStatus err;
unsafe {
err = AudioUnitGetProperty (Handle,
AudioUnitPropertyIDType.CurrentDevice,
scope,
audioUnitElement,
&device,
&size);
}
if (err != 0)
throw new AudioUnitException ((int) err);
return device;
}
#if MONOMAC || __MACCATALYST__
#if !MONOMAC && !__MACCATALYST__
[Obsolete ("This API is not available on iOS.")]
#endif
#if NET
[SupportedOSPlatform ("maccatalyst")]
[UnsupportedOSPlatform ("ios")]
[UnsupportedOSPlatform ("tvos")]
[SupportedOSPlatform ("macos")]
#else
[MacCatalyst (15, 0)]
#endif
public static uint GetCurrentInputDevice ()
{
#if MONOMAC || __MACCATALYST__
// We need to replace AudioHardwareGetProperty since it has been deprecated since OS X 10.6 and iOS 2.0
// Replacing with the following implementation recommended in the following doc
// See Listing 4 New - Getting the default input device.
// https://developer.apple.com/library/mac/technotes/tn2223/_index.html
uint inputDevice = 0;
uint size = (uint) sizeof (uint);
var theAddress = new AudioObjectPropertyAddress (
AudioObjectPropertySelector.DefaultInputDevice,
AudioObjectPropertyScope.Global,
AudioObjectPropertyElement.Main);
uint inQualifierDataSize = 0;
IntPtr inQualifierData = IntPtr.Zero;
int err;
unsafe {
err = AudioObjectGetPropertyData (1, &theAddress, &inQualifierDataSize, &inQualifierData, &size, &inputDevice);
}
if (err != 0)
throw new AudioUnitException ((int) err);
return inputDevice;
#endif
}
#endif
public unsafe AudioUnitStatus SetCurrentDevice (uint inputDevice, AudioUnitScopeType scope, uint audioUnitElement = 0)
{
return AudioUnitSetProperty (Handle,
AudioUnitPropertyIDType.CurrentDevice,
scope,
audioUnitElement,
&inputDevice,
(uint) sizeof (uint));
}
public AudioStreamBasicDescription GetAudioFormat (AudioUnitScopeType scope, uint audioUnitElement = 0)
{
var audioFormat = new AudioStreamBasicDescription ();
uint size = (uint) Marshal.SizeOf<AudioStreamBasicDescription> ();
AudioUnitStatus err;
unsafe {
err = AudioUnitGetProperty (Handle,
AudioUnitPropertyIDType.StreamFormat,
scope,
audioUnitElement,
&audioFormat,
&size);
}
if (err != 0)
throw new AudioUnitException ((int) err);
return audioFormat;
}
public ClassInfoDictionary? GetClassInfo (AudioUnitScopeType scope = AudioUnitScopeType.Global, uint audioUnitElement = 0)
{
IntPtr ptr = new IntPtr ();
int size = IntPtr.Size;
AudioUnitStatus res;
unsafe {
res = AudioUnitGetProperty (Handle,
AudioUnitPropertyIDType.ClassInfo,
scope,
audioUnitElement,
&ptr,
&size);
}
if (res != 0)
return null;
return new ClassInfoDictionary (Runtime.GetNSObject<NSDictionary> (ptr, true));
}
public AudioUnitStatus SetClassInfo (ClassInfoDictionary preset, AudioUnitScopeType scope = AudioUnitScopeType.Global, uint audioUnitElement = 0)
{
var ptr = preset.Dictionary.Handle;
unsafe {
return AudioUnitSetProperty (Handle, AudioUnitPropertyIDType.ClassInfo, scope, audioUnitElement,
&ptr, IntPtr.Size);
}
}
public unsafe AudioUnitParameterInfo []? GetParameterList (AudioUnitScopeType scope = AudioUnitScopeType.Global, uint audioUnitElement = 0)
{
uint size;
byte writable;
if (AudioUnitGetPropertyInfo (Handle, AudioUnitPropertyIDType.ParameterList, scope, audioUnitElement, &size, &writable) != 0)
return null;
// Array of AudioUnitParameterID = UInt32
var data = new uint [size / sizeof (uint)];
fixed (uint* ptr = data) {
if (AudioUnitGetProperty (Handle, AudioUnitPropertyIDType.ParameterList, scope, audioUnitElement, ptr, &size) != 0)
return null;
}
var info = new AudioUnitParameterInfo [data.Length];
size = (uint) sizeof (AudioUnitParameterInfoNative);
for (int i = 0; i < data.Length; ++i) {
var native = new AudioUnitParameterInfoNative ();
if (AudioUnitGetProperty (Handle, AudioUnitPropertyIDType.ParameterInfo, scope, data [i], &native, &size) != 0)
return null;
info [i] = AudioUnitParameterInfo.Create (native, (AudioUnitParameterType) data [i]);
}
return info;
}
public AudioUnitStatus LoadInstrument (SamplerInstrumentData instrumentData, AudioUnitScopeType scope = AudioUnitScopeType.Global, uint audioUnitElement = 0)
{
if (instrumentData is null)
ObjCRuntime.ThrowHelper.ThrowArgumentNullException (nameof (instrumentData));
var data = instrumentData.ToStruct ();
unsafe {
return AudioUnitSetProperty (Handle, AudioUnitPropertyIDType.LoadInstrument, scope, audioUnitElement,
&data, Marshal.SizeOf<AUSamplerInstrumentData> ());
}
}
public AudioUnitStatus MakeConnection (AudioUnit sourceAudioUnit, uint sourceOutputNumber, uint destInputNumber)
{
var auc = new AudioUnitConnection {
SourceAudioUnit = sourceAudioUnit.GetHandle (),
SourceOutputNumber = sourceOutputNumber,
DestInputNumber = destInputNumber
};
unsafe {
return AudioUnitSetProperty (Handle, AudioUnitPropertyIDType.MakeConnection, AudioUnitScopeType.Input, 0, &auc, Marshal.SizeOf<AudioUnitConnection> ());
}
}
public AudioUnitStatus SetEnableIO (bool enableIO, AudioUnitScopeType scope, uint audioUnitElement = 0)
{
// EnableIO: UInt32
uint flag = enableIO ? (uint) 1 : 0;
unsafe {
return AudioUnitSetProperty (Handle, AudioUnitPropertyIDType.EnableIO, scope, audioUnitElement, &flag, sizeof (uint));
}
}
public AudioUnitStatus SetMaximumFramesPerSlice (uint value, AudioUnitScopeType scope, uint audioUnitElement = 0)
{
// MaximumFramesPerSlice: UInt32
unsafe {
return AudioUnitSetProperty (Handle, AudioUnitPropertyIDType.MaximumFramesPerSlice, scope, audioUnitElement, &value, sizeof (uint));
}
}
public uint GetMaximumFramesPerSlice (AudioUnitScopeType scope = AudioUnitScopeType.Global, uint audioUnitElement = 0)
{
// MaximumFramesPerSlice: UInt32
uint value = 0;
uint size = sizeof (uint);
AudioUnitStatus res;
unsafe {
res = AudioUnitGetProperty (Handle,
AudioUnitPropertyIDType.MaximumFramesPerSlice,
scope,
audioUnitElement,
&value,
&size);
}
if (res != 0)
throw new AudioUnitException ((int) res);
return value;
}
public AudioUnitStatus SetElementCount (AudioUnitScopeType scope, uint count)
{
// ElementCount: UInt32
unsafe {
return AudioUnitSetProperty (Handle, AudioUnitPropertyIDType.ElementCount, scope, 0, &count, sizeof (uint));
}
}
public uint GetElementCount (AudioUnitScopeType scope)
{
// ElementCount: UInt32
uint value = 0;
uint size = sizeof (uint);
AudioUnitStatus res;
unsafe {
res = AudioUnitGetProperty (Handle,
AudioUnitPropertyIDType.ElementCount,
scope,
0,
&value,
&size);
}
if (res != 0)
throw new AudioUnitException ((int) res);
return value;
}
public AudioUnitStatus SetSampleRate (double sampleRate, AudioUnitScopeType scope = AudioUnitScopeType.Output, uint audioUnitElement = 0)
{
// ElementCount: Float64
unsafe {
return AudioUnitSetProperty (Handle, AudioUnitPropertyIDType.SampleRate, scope, 0, &sampleRate, sizeof (double));
}
}
public AudioUnitStatus MusicDeviceMIDIEvent (uint status, uint data1, uint data2, uint offsetSampleFrame = 0)
{
return MusicDeviceMIDIEvent (Handle, status, data1, data2, offsetSampleFrame);
}
#if !NET
[Obsolete ("This API has been removed.")]
public AudioUnitStatus SetLatency (double latency)
{
return AudioUnitStatus.OK;
}
#endif
[DllImport (Constants.AudioUnitLibrary)]
unsafe static extern AudioUnitStatus AudioUnitGetProperty (IntPtr inUnit, AudioUnitPropertyIDType inID, AudioUnitScopeType inScope, uint inElement, double* outData, uint* ioDataSize);
public double GetLatency ()
{
uint size = sizeof (double);
double latency = 0;
AudioUnitStatus err;
unsafe {
err = AudioUnitGetProperty (Handle, AudioUnitPropertyIDType.Latency, AudioUnitScopeType.Global, 0, &latency, &size);
}
if (err != 0)
throw new AudioUnitException ((int) err);
return latency;
}
#region SetRenderCallback
public AudioUnitStatus SetRenderCallback (RenderDelegate renderDelegate, AudioUnitScopeType scope = AudioUnitScopeType.Global, uint audioUnitElement = 0)
{
if (renderer is null)
Interlocked.CompareExchange (ref renderer, new Dictionary<uint, RenderDelegate> (), null);
renderer [audioUnitElement] = renderDelegate;
if (!gcHandle.IsAllocated)
gcHandle = GCHandle.Alloc (this);
var cb = new AURenderCallbackStruct ();
unsafe {
#if NET
cb.Proc = &RenderCallbackImpl;
#else
cb.Proc = Marshal.GetFunctionPointerForDelegate (CreateRenderCallback);
#endif
cb.ProcRefCon = GCHandle.ToIntPtr (gcHandle);
return AudioUnitSetProperty (Handle, AudioUnitPropertyIDType.SetRenderCallback, scope, audioUnitElement, &cb, Marshal.SizeOf<AURenderCallbackStruct> ());
}
}
#if NET
[UnmanagedCallersOnly]
static unsafe AudioUnitStatus RenderCallbackImpl (IntPtr clientData, AudioUnitRenderActionFlags* actionFlags, AudioTimeStamp* timeStamp, uint busNumber, uint numberFrames, IntPtr data)
#else
[MonoPInvokeCallback (typeof (CallbackShared))]
static AudioUnitStatus RenderCallbackImpl (IntPtr clientData, ref AudioUnitRenderActionFlags actionFlags, ref AudioTimeStamp timeStamp, uint busNumber, uint numberFrames, IntPtr data)
#endif
{
GCHandle gch = GCHandle.FromIntPtr (clientData);
var au = (AudioUnit?) gch.Target;
var renderer = au?.renderer;
if (renderer is null)
return AudioUnitStatus.Uninitialized;
if (!renderer.TryGetValue (busNumber, out var render))
return AudioUnitStatus.Uninitialized;
using (var buffers = new AudioBuffers (data)) {
#if NET
unsafe {
return render (*actionFlags, *timeStamp, busNumber, numberFrames, buffers);
}
#else
return render (actionFlags, timeStamp, busNumber, numberFrames, buffers);
#endif
}
}
#endregion
#region SetInputCallback
public AudioUnitStatus SetInputCallback (InputDelegate inputDelegate, AudioUnitScopeType scope = AudioUnitScopeType.Global, uint audioUnitElement = 0)
{
if (inputs is null)
Interlocked.CompareExchange (ref inputs, new Dictionary<uint, InputDelegate> (), null);
inputs [audioUnitElement] = inputDelegate;
if (!gcHandle.IsAllocated)
gcHandle = GCHandle.Alloc (this);
var cb = new AURenderCallbackStruct ();
unsafe {
#if NET
cb.Proc = &InputCallbackImpl;
#else
cb.Proc = Marshal.GetFunctionPointerForDelegate (CreateInputCallback);
#endif
cb.ProcRefCon = GCHandle.ToIntPtr (gcHandle);
return AudioUnitSetProperty (Handle, AudioUnitPropertyIDType.SetInputCallback, scope, audioUnitElement, &cb, Marshal.SizeOf<AURenderCallbackStruct> ());
}
}
#if NET
[UnmanagedCallersOnly]
static unsafe AudioUnitStatus InputCallbackImpl (IntPtr clientData, AudioUnitRenderActionFlags* actionFlags, AudioTimeStamp* timeStamp, uint busNumber, uint numberFrames, IntPtr data)
#else
[MonoPInvokeCallback (typeof (CallbackShared))]
static AudioUnitStatus InputCallbackImpl (IntPtr clientData, ref AudioUnitRenderActionFlags actionFlags, ref AudioTimeStamp timeStamp, uint busNumber, uint numberFrames, IntPtr data)
#endif
{
GCHandle gch = GCHandle.FromIntPtr (clientData);
var au = gch.Target as AudioUnit;
if (au is null)
return AudioUnitStatus.Uninitialized;
var inputs = au.inputs;
if (inputs is null)
return AudioUnitStatus.Uninitialized;
if (!inputs.TryGetValue (busNumber, out var input))
return AudioUnitStatus.Uninitialized;
#if NET
unsafe {
return input (*actionFlags, *timeStamp, busNumber, numberFrames, au);
}
#else
return input (actionFlags, timeStamp, busNumber, numberFrames, au);
#endif
}
#endregion
#if !MONOMAC
#if NET
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("tvos")]
[ObsoletedOSPlatform ("tvos13.0")]
[ObsoletedOSPlatform ("maccatalyst14.0")]
[ObsoletedOSPlatform ("ios13.0")]
#else
[Deprecated (PlatformName.iOS, 13, 0)]
[Deprecated (PlatformName.TvOS, 13, 0)]
[MacCatalyst (14, 0)]
[Deprecated (PlatformName.MacCatalyst, 14, 0)]
#endif
[DllImport (Constants.AudioUnitLibrary)]
static extern AudioComponentStatus AudioOutputUnitPublish (AudioComponentDescription inDesc, IntPtr /* CFStringRef */ inName, uint /* UInt32 */ inVersion, IntPtr /* AudioUnit */ inOutputUnit);
#if NET
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("tvos")]
[UnsupportedOSPlatform ("macos")]
[ObsoletedOSPlatform ("tvos13.0", "Use 'AudioUnit' instead.")]
[ObsoletedOSPlatform ("maccatalyst14.0", "Use 'AudioUnit' instead.")]
[ObsoletedOSPlatform ("ios13.0", "Use 'AudioUnit' instead.")]
#else
[Deprecated (PlatformName.iOS, 13, 0, message: "Use 'AudioUnit' instead.")]
[Deprecated (PlatformName.TvOS, 13, 0, message: "Use 'AudioUnit' instead.")]
[MacCatalyst (14, 0)]
[Deprecated (PlatformName.MacCatalyst, 14, 0, message: "Use 'AudioUnit' instead.")]
#endif
public AudioComponentStatus AudioOutputUnitPublish (AudioComponentDescription description, string name, uint version = 1)
{
if (name is null)
ObjCRuntime.ThrowHelper.ThrowArgumentNullException (nameof (name));
var nameHandle = CFString.CreateNative (name);
try {
return AudioOutputUnitPublish (description, nameHandle, version, Handle);
} finally {
CFString.ReleaseNative (nameHandle);
}
}
#if NET
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("tvos")]
[UnsupportedOSPlatform ("macos")]
[ObsoletedOSPlatform ("tvos13.0")]
[ObsoletedOSPlatform ("maccatalyst14.0")]
[ObsoletedOSPlatform ("ios13.0")]
#else
[MacCatalyst (14, 0)]
[Deprecated (PlatformName.iOS, 13, 0)]
[Deprecated (PlatformName.TvOS, 13, 0)]
[Deprecated (PlatformName.MacCatalyst, 14, 0)]
#endif
[DllImport (Constants.AudioUnitLibrary)]
static extern IntPtr AudioOutputUnitGetHostIcon (IntPtr /* AudioUnit */ au, float /* float */ desiredPointSize);
#if NET
[SupportedOSPlatform ("ios")]
[SupportedOSPlatform ("maccatalyst")]
[SupportedOSPlatform ("tvos")]
[UnsupportedOSPlatform ("macos")]
[ObsoletedOSPlatform ("tvos13.0", "Use 'AudioUnit' instead.")]
[ObsoletedOSPlatform ("maccatalyst14.0", "Use 'AudioUnit' instead.")]
[ObsoletedOSPlatform ("ios13.0", "Use 'AudioUnit' instead.")]
#else
[Deprecated (PlatformName.iOS, 13, 0, message: "Use 'AudioUnit' instead.")]
[Deprecated (PlatformName.TvOS, 13, 0, message: "Use 'AudioUnit' instead.")]
[MacCatalyst (14, 0)]
[Deprecated (PlatformName.MacCatalyst, 14, 0, message: "Use 'AudioUnit' instead.")]
#endif
public UIKit.UIImage? GetHostIcon (float desiredPointSize)
{
return Runtime.GetNSObject<UIKit.UIImage> (AudioOutputUnitGetHostIcon (Handle, desiredPointSize));
}
#endif
#if NET
public AudioUnitStatus Initialize ()
{
return AudioUnitInitialize (Handle);
}
#else
public int Initialize ()
{
return (int) AudioUnitInitialize (Handle);
}
#endif
#if NET
public AudioUnitStatus Uninitialize ()
{
return AudioUnitUninitialize (Handle);
}
#else
public int Uninitialize ()
{
return (int) AudioUnitUninitialize (Handle);
}
#endif
#if NET
public AudioUnitStatus Start ()
#else
public void Start ()
#endif
{
AudioUnitStatus rv = 0;
if (!_isPlaying) {
rv = AudioOutputUnitStart (Handle);
_isPlaying = true;
}
#if NET
return rv;
#endif
}
#if NET
public AudioUnitStatus Stop ()
#else
public void Stop ()
#endif
{
AudioUnitStatus rv = 0;
if (_isPlaying) {
rv = AudioOutputUnitStop (Handle);
_isPlaying = false;
}
#if NET
return rv;
#endif
}
#region Render
public AudioUnitStatus Render (ref AudioUnitRenderActionFlags actionFlags, AudioTimeStamp timeStamp, uint busNumber, uint numberFrames, AudioBuffers data)
{
if ((IntPtr) data == IntPtr.Zero)
ObjCRuntime.ThrowHelper.ThrowArgumentNullException (nameof (data));
unsafe {
return AudioUnitRender (
Handle,
(AudioUnitRenderActionFlags*) Unsafe.AsPointer<AudioUnitRenderActionFlags> (ref actionFlags),
&timeStamp,
busNumber,
numberFrames,
(IntPtr) data);
}
}
#endregion
public AudioUnitStatus SetParameter (AudioUnitParameterType type, float value, AudioUnitScopeType scope, uint audioUnitElement = 0)
{
return AudioUnitSetParameter (Handle, type, scope, audioUnitElement, value, 0);
}
public AudioUnitStatus ScheduleParameter (AudioUnitParameterEvent inParameterEvent, uint inNumParamEvents)
{
return AudioUnitScheduleParameters (Handle, inParameterEvent, inNumParamEvents);
}
[DllImport (Constants.AudioUnitLibrary)]
static extern int AudioComponentInstanceDispose (IntPtr inInstance);
protected override void Dispose (bool disposing)
{
if (Handle != IntPtr.Zero && Owns) {
Stop ();
AudioUnitUninitialize (Handle);
AudioComponentInstanceDispose (Handle);
}
if (gcHandle.IsAllocated)
gcHandle.Free ();
base.Dispose (disposing);
}
[DllImport (Constants.AudioUnitLibrary)]
unsafe static extern AudioUnitStatus AudioComponentInstanceNew (IntPtr inComponent, IntPtr* inDesc);
[DllImport (Constants.AudioUnitLibrary)]
static extern IntPtr AudioComponentInstanceGetComponent (IntPtr inComponent);
[DllImport (Constants.AudioUnitLibrary)]
static extern AudioUnitStatus AudioUnitInitialize (IntPtr inUnit);
[DllImport (Constants.AudioUnitLibrary)]
static extern AudioUnitStatus AudioUnitUninitialize (IntPtr inUnit);
[DllImport (Constants.AudioUnitLibrary)]
static extern AudioUnitStatus AudioOutputUnitStart (IntPtr ci);
[DllImport (Constants.AudioUnitLibrary)]
static extern AudioUnitStatus AudioOutputUnitStop (IntPtr ci);
[DllImport (Constants.AudioUnitLibrary)]
unsafe static extern AudioUnitStatus AudioUnitRender (IntPtr inUnit, AudioUnitRenderActionFlags* ioActionFlags, AudioTimeStamp* inTimeStamp,
uint inOutputBusNumber, uint inNumberFrames, IntPtr ioData);
[DllImport (Constants.AudioUnitLibrary)]
unsafe static extern int AudioUnitSetProperty (IntPtr inUnit, AudioUnitPropertyIDType inID, AudioUnitScopeType inScope, uint inElement,
AudioStreamBasicDescription* inData,
uint inDataSize);
[DllImport (Constants.AudioUnitLibrary)]
unsafe static extern AudioUnitStatus AudioUnitSetProperty (IntPtr inUnit, AudioUnitPropertyIDType inID, AudioUnitScopeType inScope, uint inElement,
uint* inData, uint inDataSize);
[DllImport (Constants.AudioUnitLibrary)]
unsafe static extern AudioUnitStatus AudioUnitSetProperty (IntPtr inUnit, AudioUnitPropertyIDType inID, AudioUnitScopeType inScope, uint inElement,
double* inData, uint inDataSize);