unsafe void TapProcess(MTAudioProcessingTap tap, nint numberFrames, MTAudioProcessingTapFlags flags,
AudioBuffers bufferList,
out nint numberFramesOut,
out MTAudioProcessingTapFlags flagsOut)
{
numberFramesOut = 0;
flagsOut = (MTAudioProcessingTapFlags)0;
// Skip processing when format not supported.
if (!context.SupportedTapProcessingFormat)
{
Console.WriteLine("Unsupported tap processing format.");
return;
}
if (IsBandpassFilterEnabled)
{
// Apply bandpass filter Audio Unit.
if (context.AudioUnit != null)
{
var audioTimeStamp = new AudioTimeStamp
{
SampleTime = context.SampleCount,
Flags = AudioTimeStamp.AtsFlags.SampleTimeValid
};
var f = (AudioUnitRenderActionFlags)0;
var status = context.AudioUnit.Render(ref f, audioTimeStamp, 0, (uint)numberFrames, bufferList);
if (status != AudioUnitStatus.NoError)
{
Console.WriteLine("AudioUnitRender(): {0}", status);
return;
}
// Increment sample count for audio unit.
context.SampleCount += numberFrames;
// Set number of frames out.
numberFramesOut = numberFrames;
}
}
else
{
// Get actual audio buffers from MTAudioProcessingTap (AudioUnitRender() will fill bufferListInOut otherwise).
CMTimeRange tr;
var status = tap.GetSourceAudio(numberFrames, bufferList, out flagsOut, out tr, out numberFramesOut);
if (status != MTAudioProcessingTapError.None)
{
Console.WriteLine("MTAudioProcessingTapGetSourceAudio: {0}", status);
return;
}
}
try
{
UpdateVolumes(bufferList, numberFrames);
}
catch (Exception ex)
{
}
}
public unsafe void Initialization()
{
TestRuntime.AssertSystemVersion(PlatformName.MacOSX, 10, 9, throwIfOtherPlatform: false);
var cb = new MTAudioProcessingTapCallbacks(
#if XAMCORE_2_0
delegate(MTAudioProcessingTap tap, nint numberFrames, MTAudioProcessingTapFlags flags, AudioBuffers bufferList, out nint numberFramesOut, out MTAudioProcessingTapFlags flagsOut) {
#else
delegate(MTAudioProcessingTap tap, long numberFrames, MTAudioProcessingTapFlags flags, AudioBuffers bufferList, out long numberFramesOut, out MTAudioProcessingTapFlags flagsOut) {
#endif
numberFramesOut = 2;
flagsOut = MTAudioProcessingTapFlags.StartOfStream;
});
cb.Initialize = delegate(MTAudioProcessingTap tap, out void *tapStorage) {
tapStorage = (void *)44;
};
IntPtr handle;
using (var res = new MTAudioProcessingTap(cb, MTAudioProcessingTapCreationFlags.PreEffects))
{
handle = res.Handle;
Assert.AreEqual(44, (int)res.GetStorage());
Assert.That(CFGetRetainCount(handle), Is.EqualTo((nint)1), "RC");
}
}
}
public unsafe void Initialization()
{
if (!TestRuntime.CheckSystemAndSDKVersion(6, 0))
{
Assert.Inconclusive("MediaToolbox is new in 6.0");
}
var cb = new MTAudioProcessingTapCallbacks(
#if XAMCORE_2_0
delegate(MTAudioProcessingTap tap, nint numberFrames, MTAudioProcessingTapFlags flags, AudioBuffers bufferList, out nint numberFramesOut, out MTAudioProcessingTapFlags flagsOut) {
#else
delegate(MTAudioProcessingTap tap, long numberFrames, MTAudioProcessingTapFlags flags, AudioBuffers bufferList, out long numberFramesOut, out MTAudioProcessingTapFlags flagsOut) {
#endif
numberFramesOut = 2;
flagsOut = MTAudioProcessingTapFlags.StartOfStream;
});
cb.Initialize = delegate(MTAudioProcessingTap tap, out void *tapStorage) {
tapStorage = (void *)44;
};
IntPtr handle;
using (var res = new MTAudioProcessingTap(cb, MTAudioProcessingTapCreationFlags.PreEffects))
{
handle = res.Handle;
Assert.AreEqual(44, (int)res.GetStorage());
Assert.That(CFGetRetainCount(handle), Is.EqualTo((nint)1), "RC");
}
}
}
unsafe void TapPrepare(MTAudioProcessingTap tap, nint maxFrames, ref AudioStreamBasicDescription processingFormat)
{
// Store sample rate for CenterFrequency property
context.SampleRate = processingFormat.SampleRate;
/* Verify processing format (this is not needed for Audio Unit, but for RMS calculation). */
VerifyProcessingFormat(processingFormat);
if (processingFormat.FormatFlags.HasFlag(AudioFormatFlags.IsNonInterleaved))
{
context.IsNonInterleaved = true;
}
/* Create bandpass filter Audio Unit */
var audioComponentDescription = AudioComponentDescription.CreateEffect(AudioTypeEffect.BandPassFilter);
// TODO: https://trello.com/c/GZUGUyH0
var audioComponent = AudioComponent.FindNextComponent(null, ref audioComponentDescription);
if (audioComponent == null)
{
return;
}
AudioUnitStatus error = AudioUnitStatus.NoError;
AudioUnit.AudioUnit audioUnit = audioComponent.CreateAudioUnit();
try {
audioUnit.SetAudioFormat(processingFormat, AudioUnitScopeType.Input);
audioUnit.SetAudioFormat(processingFormat, AudioUnitScopeType.Output);
} catch (AudioUnitException) {
error = AudioUnitStatus.FormatNotSupported;
}
if (error == AudioUnitStatus.NoError)
{
error = audioUnit.SetRenderCallback(Render, AudioUnitScopeType.Input);
}
if (error == AudioUnitStatus.NoError)
{
error = audioUnit.SetMaximumFramesPerSlice((uint)maxFrames, AudioUnitScopeType.Global);
}
if (error == AudioUnitStatus.NoError)
{
error = (AudioUnitStatus)audioUnit.Initialize();
}
if (error != AudioUnitStatus.NoError)
{
audioUnit.Dispose();
audioUnit = null;
}
context.AudioUnit = audioUnit;
}
unsafe void Unprepare(MTAudioProcessingTap tap)
{
/* Release bandpass filter Audio Unit */
if (context.AudioUnit == null)
{
return;
}
context.AudioUnit.Dispose();
}
unsafe void TapInitialization(MTAudioProcessingTap tap, out void *tapStorage)
{
context = new AVAudioTapProcessorContext {
SupportedTapProcessingFormat = false,
IsNonInterleaved = false,
SampleRate = double.NaN,
SampleCount = 0,
LeftChannelVolume = 0,
RightChannelVolume = 0
};
// We don't use tapStorage we store all data within context field
tapStorage = (void *)IntPtr.Zero;
}
unsafe AVAudioMix CreateAudioMix ()
{
AVMutableAudioMix audioMix = AVMutableAudioMix.Create ();
AVMutableAudioMixInputParameters audioMixInputParameters = AVMutableAudioMixInputParameters.FromTrack (audioAssetTrack);
var callbacks = new MTAudioProcessingTapCallbacks (TapProcess) {
Initialize = TapInitialization,
Finalize = Finalaze,
Prepare = TapPrepare,
Unprepare = Unprepare,
};
audioProcessingTap = new MTAudioProcessingTap (callbacks, MTAudioProcessingTapCreationFlags.PreEffects);
audioMixInputParameters.AudioTapProcessor = audioProcessingTap;
audioMix.InputParameters = new AVAudioMixInputParameters[] { audioMixInputParameters };
return audioMix;
}
unsafe AVAudioMix CreateAudioMix()
{
AVMutableAudioMix audioMix = AVMutableAudioMix.Create();
AVMutableAudioMixInputParameters audioMixInputParameters = AVMutableAudioMixInputParameters.FromTrack(audioAssetTrack);
var callbacks = new MTAudioProcessingTapCallbacks(TapProcess)
{
Initialize = TapInitialization,
Finalize = Finalaze,
Prepare = TapPrepare,
Unprepare = Unprepare,
};
audioProcessingTap = new MTAudioProcessingTap(callbacks, MTAudioProcessingTapCreationFlags.PreEffects);
audioMixInputParameters.AudioTapProcessor = audioProcessingTap;
audioMix.InputParameters = new AVAudioMixInputParameters[] { audioMixInputParameters };
return(audioMix);
}
unsafe void TapPrepare(MTAudioProcessingTap tap, nint maxFrames, ref AudioStreamBasicDescription processingFormat)
{
// Store sample rate for CenterFrequency property
context.SampleRate = processingFormat.SampleRate;
/* Verify processing format (this is not needed for Audio Unit, but for RMS calculation). */
VerifyProcessingFormat(processingFormat);
if (processingFormat.FormatFlags.HasFlag(AudioFormatFlags.IsNonInterleaved))
{
context.IsNonInterleaved = true;
}
/* Create bandpass filter Audio Unit */
var audioComponentDescription = AudioComponentDescription.CreateEffect(AudioTypeEffect.NBandEq);
// TODO: https://trello.com/c/GZUGUyH0
var audioComponent = AudioComponent.FindNextComponent(null, ref audioComponentDescription);
if (audioComponent == null)
{
return;
}
var error = AudioUnitStatus.NoError;
var audioUnit = audioComponent.CreateAudioUnit();
try
{
audioUnit.SetFormat(processingFormat, AudioUnitScopeType.Input);
audioUnit.SetFormat(processingFormat, AudioUnitScopeType.Output);
}
catch (AudioUnitException)
{
error = AudioUnitStatus.FormatNotSupported;
}
if (error == AudioUnitStatus.NoError)
{
error = audioUnit.SetRenderCallback(Render, AudioUnitScopeType.Input);
}
if (error == AudioUnitStatus.NoError)
{
error = audioUnit.SetMaximumFramesPerSlice((uint)maxFrames, AudioUnitScopeType.Global);
}
if (error == AudioUnitStatus.NoError)
{
error = (AudioUnitStatus)audioUnit.Initialize();
}
if (error != AudioUnitStatus.NoError)
{
audioUnit.Dispose();
audioUnit = null;
}
context.AudioUnit = audioUnit;
uint value = 10;
uint size = sizeof(uint);
var stat = AudioUnitSetProperty(audioUnit.Handle, AUNGraphicParams.NumberOfBands, AudioUnitScopeType.Global, 0,
ref value, size);
for (var i = 0; i < Parent.Bands.Length; i++)
{
var band = Parent.Bands[i];
var freq = context.AudioUnit.SetParameter(AudioUnitParameterType.AUNBandEQFrequency + i, band.Center,
AudioUnitScopeType.Global);
var bypass = context.AudioUnit.SetParameter(AudioUnitParameterType.AUNBandEQBypassBand + i, 0,
AudioUnitScopeType.Global);
SetBand(i, band.Gain);
Console.WriteLine(freq);
}
}
unsafe void Finalize(MTAudioProcessingTap tap)
{
}
unsafe void Unprepare (MTAudioProcessingTap tap)
{
/* Release bandpass filter Audio Unit */
if (context.AudioUnit == null)
return;
context.AudioUnit.Dispose ();
}
unsafe void TapPrepare (MTAudioProcessingTap tap, nint maxFrames, ref AudioStreamBasicDescription processingFormat)
{
// Store sample rate for CenterFrequency property
context.SampleRate = processingFormat.SampleRate;
/* Verify processing format (this is not needed for Audio Unit, but for RMS calculation). */
VerifyProcessingFormat (processingFormat);
if (processingFormat.FormatFlags.HasFlag (AudioFormatFlags.IsNonInterleaved))
context.IsNonInterleaved = true;
/* Create bandpass filter Audio Unit */
var audioComponentDescription = AudioComponentDescription.CreateEffect (AudioTypeEffect.BandPassFilter);
// TODO: https://trello.com/c/GZUGUyH0
var audioComponent = AudioComponent.FindNextComponent (null, ref audioComponentDescription);
if (audioComponent == null)
return;
AudioUnitStatus error = AudioUnitStatus.NoError;
AudioUnit.AudioUnit audioUnit = audioComponent.CreateAudioUnit ();
try {
audioUnit.SetAudioFormat (processingFormat, AudioUnitScopeType.Input);
audioUnit.SetAudioFormat (processingFormat, AudioUnitScopeType.Output);
} catch (AudioUnitException) {
error = AudioUnitStatus.FormatNotSupported;
}
if (error == AudioUnitStatus.NoError)
error = audioUnit.SetRenderCallback (Render, AudioUnitScopeType.Input);
if (error == AudioUnitStatus.NoError)
error = audioUnit.SetMaximumFramesPerSlice ((uint)maxFrames, AudioUnitScopeType.Global);
if (error == AudioUnitStatus.NoError)
error = (AudioUnitStatus)audioUnit.Initialize ();
if (error != AudioUnitStatus.NoError) {
audioUnit.Dispose ();
audioUnit = null;
}
context.AudioUnit = audioUnit;
}
unsafe void Finalaze (MTAudioProcessingTap tap)
{
}
unsafe void TapInitialization (MTAudioProcessingTap tap, out void* tapStorage)
{
context = new AVAudioTapProcessorContext {
SupportedTapProcessingFormat = false,
IsNonInterleaved = false,
SampleRate = double.NaN,
SampleCount = 0,
LeftChannelVolume = 0,
RightChannelVolume = 0
};
// We don't use tapStorage we store all data within context field
tapStorage = (void*)IntPtr.Zero;
}
unsafe void TapProcess (MTAudioProcessingTap tap, nint numberFrames, MTAudioProcessingTapFlags flags,
AudioBuffers bufferList,
out nint numberFramesOut,
out MTAudioProcessingTapFlags flagsOut)
{
numberFramesOut = 0;
flagsOut = (MTAudioProcessingTapFlags)0;
// Skip processing when format not supported.
if (!context.SupportedTapProcessingFormat) {
Console.WriteLine ("Unsupported tap processing format.");
return;
}
if (IsBandpassFilterEnabled) {
// Apply bandpass filter Audio Unit.
if (context.AudioUnit != null) {
var audioTimeStamp = new AudioTimeStamp {
SampleTime = context.SampleCount,
Flags = AudioTimeStamp.AtsFlags.SampleTimeValid
};
var f = (AudioUnitRenderActionFlags)0;
var status = context.AudioUnit.Render (ref f, audioTimeStamp, 0, (uint)numberFrames, bufferList);
if (status != AudioUnitStatus.NoError) {
Console.WriteLine ("AudioUnitRender(): {0}", status);
return;
}
// Increment sample count for audio unit.
context.SampleCount += numberFrames;
// Set number of frames out.
numberFramesOut = numberFrames;
}
} else {
// Get actual audio buffers from MTAudioProcessingTap (AudioUnitRender() will fill bufferListInOut otherwise).
CMTimeRange tr;
MTAudioProcessingTapError status = tap.GetSourceAudio (numberFrames, bufferList, out flagsOut, out tr, out numberFramesOut);
if (status != MTAudioProcessingTapError.None) {
Console.WriteLine ("MTAudioProcessingTapGetSourceAudio: {0}", status);
return;
}
}
UpdateVolumes (bufferList, numberFrames);
}
