FineAudio/SoundInstance.cs

311 lines
8.6 KiB
C#

using System;
using System.Runtime.InteropServices;
namespace MoonWorks.Audio
{
public abstract class SoundInstance : IDisposable
{
protected AudioDevice Device { get; }
internal IntPtr Handle { get; }
public Sound Parent { get; }
protected FAudio.F3DAUDIO_DSP_SETTINGS dspSettings;
protected bool is3D;
private bool IsDisposed;
public abstract SoundState State { get; protected set; }
private float _pan = 0;
public float Pan
{
get => _pan;
set
{
_pan = value;
if (_pan < -1f)
{
_pan = -1f;
}
if (_pan > 1f)
{
_pan = 1f;
}
if (is3D) { return; }
SetPanMatrixCoefficients();
FAudio.FAudioVoice_SetOutputMatrix(
Handle,
Device.MasteringVoice,
dspSettings.SrcChannelCount,
dspSettings.DstChannelCount,
dspSettings.pMatrixCoefficients,
0
);
}
}
private float _pitch = 1;
public float Pitch
{
get => _pitch;
set
{
float doppler;
if (!is3D || Device.DopplerScale == 0f)
{
doppler = 1f;
}
else
{
doppler = dspSettings.DopplerFactor * Device.DopplerScale;
}
_pitch = value;
FAudio.FAudioSourceVoice_SetFrequencyRatio(
Handle,
(float) Math.Pow(2.0, _pitch) * doppler,
0
);
}
}
private float _volume = 1;
public float Volume
{
get => _volume;
set
{
_volume = value;
FAudio.FAudioVoice_SetVolume(Handle, _volume, 0);
}
}
private float _reverb;
public unsafe float Reverb
{
get => _reverb;
set
{
_reverb = value;
float* outputMatrix = (float*) dspSettings.pMatrixCoefficients;
outputMatrix[0] = _reverb;
if (dspSettings.SrcChannelCount == 2)
{
outputMatrix[1] = _reverb;
}
FAudio.FAudioVoice_SetOutputMatrix(
Handle,
Device.ReverbVoice,
dspSettings.SrcChannelCount,
1,
dspSettings.pMatrixCoefficients,
0
);
}
}
private float _lowPassFilter;
public float LowPassFilter
{
get => _lowPassFilter;
set
{
_lowPassFilter = value;
FAudio.FAudioFilterParameters p = new FAudio.FAudioFilterParameters();
p.Type = FAudio.FAudioFilterType.FAudioLowPassFilter;
p.Frequency = _lowPassFilter;
p.OneOverQ = 1f;
FAudio.FAudioVoice_SetFilterParameters(
Handle,
ref p,
0
);
}
}
private float _highPassFilter;
public float HighPassFilter
{
get => _highPassFilter;
set
{
_highPassFilter = value;
FAudio.FAudioFilterParameters p = new FAudio.FAudioFilterParameters();
p.Type = FAudio.FAudioFilterType.FAudioHighPassFilter;
p.Frequency = _highPassFilter;
p.OneOverQ = 1f;
FAudio.FAudioVoice_SetFilterParameters(
Handle,
ref p,
0
);
}
}
private float _bandPassFilter;
public float BandPassFilter
{
get => _bandPassFilter;
set
{
_bandPassFilter = value;
FAudio.FAudioFilterParameters p = new FAudio.FAudioFilterParameters();
p.Type = FAudio.FAudioFilterType.FAudioBandPassFilter;
p.Frequency = _bandPassFilter;
p.OneOverQ = 1f;
FAudio.FAudioVoice_SetFilterParameters(
Handle,
ref p,
0
);
}
}
public SoundInstance(
AudioDevice device,
Sound parent,
bool is3D
) {
Device = device;
Parent = parent;
FAudio.FAudioWaveFormatEx format = Parent.Format;
FAudio.FAudio_CreateSourceVoice(
Device.Handle,
out var handle,
ref format,
FAudio.FAUDIO_VOICE_USEFILTER,
FAudio.FAUDIO_DEFAULT_FREQ_RATIO,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero
);
if (handle == IntPtr.Zero)
{
Logger.LogError("SoundInstance failed to initialize!");
return;
}
Handle = handle;
this.is3D = is3D;
InitDSPSettings(Parent.Format.nChannels);
}
private void InitDSPSettings(uint srcChannels)
{
dspSettings = new FAudio.F3DAUDIO_DSP_SETTINGS();
dspSettings.DopplerFactor = 1f;
dspSettings.SrcChannelCount = srcChannels;
dspSettings.DstChannelCount = Device.DeviceDetails.OutputFormat.Format.nChannels;
int memsize = (
4 *
(int) dspSettings.SrcChannelCount *
(int) dspSettings.DstChannelCount
);
dspSettings.pMatrixCoefficients = Marshal.AllocHGlobal(memsize);
unsafe
{
byte* memPtr = (byte*) dspSettings.pMatrixCoefficients;
for (int i = 0; i < memsize; i += 1)
{
memPtr[i] = 0;
}
}
SetPanMatrixCoefficients();
}
// Taken from https://github.com/FNA-XNA/FNA/blob/master/src/Audio/SoundEffectInstance.cs
private unsafe void SetPanMatrixCoefficients()
{
/* Two major things to notice:
* 1. The spec assumes any speaker count >= 2 has Front Left/Right.
* 2. Stereo panning is WAY more complicated than you think.
* The main thing is that hard panning does NOT eliminate an
* entire channel; the two channels are blended on each side.
* -flibit
*/
float* outputMatrix = (float*) dspSettings.pMatrixCoefficients;
if (dspSettings.SrcChannelCount == 1)
{
if (dspSettings.DstChannelCount == 1)
{
outputMatrix[0] = 1.0f;
}
else
{
outputMatrix[0] = (_pan > 0.0f) ? (1.0f - _pan) : 1.0f;
outputMatrix[1] = (_pan < 0.0f) ? (1.0f + _pan) : 1.0f;
}
}
else
{
if (dspSettings.DstChannelCount == 1)
{
outputMatrix[0] = 1.0f;
outputMatrix[1] = 1.0f;
}
else
{
if (_pan <= 0.0f)
{
// Left speaker blends left/right channels
outputMatrix[0] = 0.5f * _pan + 1.0f;
outputMatrix[1] = 0.5f * -_pan;
// Right speaker gets less of the right channel
outputMatrix[2] = 0.0f;
outputMatrix[3] = _pan + 1.0f;
}
else
{
// Left speaker gets less of the left channel
outputMatrix[0] = -_pan + 1.0f;
outputMatrix[1] = 0.0f;
// Right speaker blends right/left channels
outputMatrix[2] = 0.5f * _pan;
outputMatrix[3] = 0.5f * -_pan + 1.0f;
}
}
}
}
protected virtual void Dispose(bool disposing)
{
if (!IsDisposed)
{
if (disposing)
{
// dispose managed state (managed objects)
}
FAudio.FAudioVoice_DestroyVoice(Handle);
Marshal.FreeHGlobal(dspSettings.pMatrixCoefficients);
IsDisposed = true;
}
}
~SoundInstance()
{
// Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
Dispose(disposing: false);
}
public void Dispose()
{
// Do not change this code. Put cleanup code in 'Dispose(bool disposing)' method
Dispose(disposing: true);
GC.SuppressFinalize(this);
}
}
}