public virtual void ChannelStep(int cycles)
{
if (!Active || _spu.Device.Cpu.SpeedFactor < 0.5)
{
return;
}
UpdateVolume(cycles);
const float maxAmplitude = 0.05f;
double realFrequency = 131072.0 / (2048.0 - Frequency) / 2;
int sampleRate = ChannelOutput.SampleRate;
double timeDelta = (cycles / GameBoyCpu.OfficialClockFrequency) / _spu.Device.Cpu.SpeedFactor * 2;
int sampleCount = (int)(timeDelta * sampleRate);
float[] buffer = new float[sampleCount];
if (!UseSoundLength || _length >= 0)
{
for (int i = 0; i < buffer.Length; i++)
{
buffer[i] = (float)(maxAmplitude * (_volume / 15.0) // Volume adjustments.
* Math.Sign(Math.Sin(2 * Math.PI * realFrequency * _coordinate / sampleRate))); // Square wave formula
_coordinate = (_coordinate + 1) % sampleRate;
}
if (UseSoundLength)
{
_length -= timeDelta;
}
}
ChannelOutput.BufferSoundSamples(buffer, 0, buffer.Length);
}
public void ChannelStep(int cycles)
{
double cpuSpeedFactor = Spu.Device.cpu.SpeedFactor;
if (!Active ||
!SoundEnabled ||
double.IsNaN(cpuSpeedFactor) ||
double.IsInfinity(cpuSpeedFactor) ||
cpuSpeedFactor < 0.5)
{
return;
}
int sampleRate = ChannelOutput.SampleRate;
double timeDelta = (cycles / GameBoySpu.ClockSpeedHz) / cpuSpeedFactor;
int sampleCount = (int)(timeDelta * sampleRate) * 2;
float[] buffer = new float[sampleCount];
double interval = 1.0 / Frequency;
int intervalSampleCount = (int)(interval * sampleRate);
if (intervalSampleCount > 0)
{
for (int i = 0; i < buffer.Length; i += 2)
{
_coordinate++;
if (_coordinate >= intervalSampleCount)
{
_top = !_top;
_coordinate = 0;
}
int waveRamCoordinate = (int)(_coordinate / (double)intervalSampleCount * _waveRam.Length);
int waveDataSample = _top
? (_waveRam[waveRamCoordinate] & 0xF)
: ((_waveRam[waveRamCoordinate] >> 4) & 0xF);
float sample = ChannelVolume * OutputLevel * (waveDataSample - 7) / 15f;
Spu.WriteToSoundBuffer(ChannelNumber, buffer, i, sample);
}
}
ChannelOutput.BufferSoundSamples(buffer, 0, buffer.Length);
}
public void ChannelStep(int cycles)
{
double cpuSpeedFactor = Spu.Device.SpeedFactor;
if (!Active)
{
return;
}
int sampleRate = ChannelOutput.SampleRate;
double timeDelta = (cycles / GameBoyCpu.OfficialClockFrequency) / cpuSpeedFactor;
int sampleCount = (int)(timeDelta * sampleRate) * 2;
using (var malloc = MemoryPool <float> .Shared.Rent(sampleCount))
{
var buffer = malloc.Memory.Span;
double interval = 1.0 / Frequency;
int intervalSampleCount = (int)(interval * sampleRate);
if (intervalSampleCount > 0)
{
for (int i = 0; i < sampleCount; i += 2)
{
_coordinate++;
if (_coordinate >= intervalSampleCount)
{
_top = !_top;
_coordinate = 0;
}
int waveRamCoordinate = (int)(_coordinate / (double)intervalSampleCount * _waveRam.Length);
int waveDataSample = _top
? (_waveRam[waveRamCoordinate] & 0xF)
: ((_waveRam[waveRamCoordinate] >> 4) & 0xF);
float sample = ChannelVolume * OutputLevel * (waveDataSample - 7) / 15f;
Spu.WriteToSoundBuffer(ChannelNumber, buffer, i, sample);
}
}
ChannelOutput.BufferSoundSamples(buffer, 0, sampleCount);
}
}
public virtual void ChannelStep(int cycles)
{
double cpuSpeedFactor = Spu.Device.SpeedFactor;
if (!Active)
{
return;
}
// Update volume and calculate wave amplitude.
_volumeEnvelope.Update(cycles);
double amplitude = ChannelVolume * (_volumeEnvelope.Volume / 15.0);
// Obtain elapsed gameboy time.
double timeDelta = (cycles / GameBoyCpu.OfficialClockFrequency) / cpuSpeedFactor;
// Allocate sound buffer.
int sampleRate = ChannelOutput.SampleRate;
int sampleCount = (int)Math.Ceiling(timeDelta * sampleRate) * 2;
using (var malloc = MemoryPool <float> .Shared.Rent(sampleCount))
{
var buffer = malloc.Memory.Span;
if (!UseSoundLength || _length >= 0)
{
double period = 1f / Frequency;
for (int i = 0; i < sampleCount; i += 2)
{
// Get current x coordinate and compute current sample value.
double x = (double)_coordinate / sampleRate;
float sample = DutyWave(amplitude, x, period);
Spu.WriteToSoundBuffer(ChannelNumber, buffer, i, sample);
_coordinate = (_coordinate + 1) % sampleRate;
}
if (UseSoundLength)
{
_length -= timeDelta;
}
}
ChannelOutput.BufferSoundSamples(buffer, 0, sampleCount);
}
}
public virtual void ChannelStep(int cycles)
{
double cpuSpeedFactor = Spu.Device.cpu.SpeedFactor;
if (!Active || double.IsNaN(cpuSpeedFactor) || double.IsInfinity(cpuSpeedFactor) || cpuSpeedFactor < 0.5)
{
return;
}
// Update volume and calculate wave amplitude.
_volumeEnvelope.Update(cycles);
double amplitude = ChannelVolume * (_volumeEnvelope.Volume / 15.0);
// Obtain elapsed gameboy time.
double timeDelta = (cycles / GameBoySpu.ClockSpeedHz) / cpuSpeedFactor;
// Allocate sound buffer.
int sampleRate = ChannelOutput.SampleRate;
int sampleCount = (int)Math.Ceiling(timeDelta * sampleRate) * 2;
var buffer = new float[sampleCount];
if (!UseSoundLength || _length >= 0)
{
double period = 1f / Frequency;
for (int i = 0; i < buffer.Length; i += 2)
{
// Get current x coordinate and compute current sample value.
double x = (double)_coordinate / sampleRate;
float sample = DutyWave(amplitude, x, period);
Spu.WriteToSoundBuffer(ChannelNumber, buffer, i, sample);
_coordinate = (_coordinate + 1) % sampleRate;
}
if (UseSoundLength)
{
_length -= timeDelta;
}
}
ChannelOutput.BufferSoundSamples(buffer, 0, buffer.Length);
}
public virtual void ChannelStep(int cycles)
{
double cpuSpeedFactor = _spu.Device.Cpu.SpeedFactor;
if (!Active || double.IsNaN(cpuSpeedFactor) || double.IsInfinity(cpuSpeedFactor) || cpuSpeedFactor < 0.5)
{
return;
}
UpdateVolume(cycles);
double realFrequency = 131072.0 / (2048.0 - Frequency);
int sampleRate = ChannelOutput.SampleRate;
double timeDelta = (cycles / GameBoyCpu.OfficialClockFrequency) / cpuSpeedFactor;
int sampleCount = (int)(timeDelta * sampleRate) * 2;
float[] buffer = new float[sampleCount];
if (!UseSoundLength || _length >= 0)
{
for (int i = 0; i < buffer.Length; i += 2)
{
float sample = (float)(ChannelVolume * (_volume / 15.0) // Volume adjustments.
* Math.Sign(Math.Sin(2 * Math.PI * realFrequency * _coordinate / sampleRate))); // Square wave formula
_spu.WriteToSoundBuffer(ChannelNumber, buffer, i, sample);
_coordinate = (_coordinate + 1) % sampleRate;
}
if (UseSoundLength)
{
_length -= timeDelta;
}
}
ChannelOutput.BufferSoundSamples(buffer, 0, buffer.Length);
}
