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;
}
public static AudioComponent FindComponent(AudioTypeEffect effect)
{
var cd = AudioComponentDescription.CreateEffect(effect);
return(FindComponent(ref cd));
}
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);
}
}