public void CacheSamples()
{
while(_currentSynthesizedSample < (uint)envelopeFullLength)
{
//TODO: error checking, exceptions, etc...
SynthesizedBuffer buffer = new SynthesizedBuffer();
buffer.samples = new float[this.BufferSize];
//initialize buffer
for(int i = 0; i < buffer.samples.Length; i++)
buffer.samples[i] = 0.0f;
bool finished = false;
//for (int i = 0; i < samples.Length; i++)
for(long counter = 0; counter < this.BufferSize; counter++)
{
if (finished)
break;
// Repeats every _repeatLimit times, partially resetting the sound parameters
if(repeatLimit != 0)
{
if(++repeatTime >= repeatLimit)
{
repeatTime = 0;
Reset(false);
}
}
// If _changeLimit is reached, shifts the pitch
if(changeLimit != 0)
{
if(++changeTime >= changeLimit)
{
changeLimit = 0;
period *= changeAmount;
}
}
// Acccelerate and apply slide
slide += deltaSlide;
period *= slide;
// Checks for frequency getting too low, and stops the sound if a minFrequency was set
if(period > maxPeriod)
{
period = maxPeriod;
if(minFrequency > 0.0)
finished = true;
}
periodTemp = period;
// Applies the vibrato effect
if(vibratoAmplitude > 0.0)
{
vibratoPhase += vibratoSpeed;
periodTemp = period * (float)(1.0 + Math.Sin(vibratoPhase) * vibratoAmplitude);
}
periodTemp = (int)periodTemp;
if(periodTemp < 8)
periodTemp = 8;
// Sweeps the square duty
if (waveType == 0)
{
squareDuty += dutySweep;
if(squareDuty < 0.0f)
squareDuty = 0.0f;
else if (squareDuty > 0.5f)
squareDuty = 0.5f;
}
// Moves through the different stages of the volume envelope
if(++envelopeTime > envelopeLength)
{
envelopeTime = 0;
switch(++envelopeStage)
{
case 1:
envelopeLength = envelopeLength1;
break;
case 2:
envelopeLength = envelopeLength2;
break;
}
}
// Sets the volume based on the position in the envelope
switch(envelopeStage)
{
case 0:
envelopeVolume = envelopeTime * envelopeOverLength0;
break;
case 1:
envelopeVolume = 1.0f + (1.0f - envelopeTime * envelopeOverLength1) * 2.0f * sustainPunch;
break;
case 2:
envelopeVolume = 1.0f - envelopeTime * envelopeOverLength2;
break;
case 3:
envelopeVolume = 0.0f;
finished = true;
break;
}
// Moves the phaser offset
if (phaser)
{
phaserOffset += phaserDeltaOffset;
phaserInt = (int)phaserOffset;
if(phaserInt < 0)
phaserInt = -phaserInt;
else if (phaserInt > 1023)
phaserInt = 1023;
}
// Moves the high-pass filter cutoff
if(filters && hpFilterDeltaCutoff != 0.0)
{
hpFilterCutoff *= hpFilterDeltaCutoff;
if(hpFilterCutoff < 0.00001f)
hpFilterCutoff = 0.00001f;
else if(hpFilterCutoff > 0.1f)
hpFilterCutoff = 0.1f;
}
superSample = 0.0f;
for(int j = 0; j < 8; j++)
{
// Cycles through the period
phase++;
if(phase >= periodTemp)
{
phase = phase - (int)periodTemp;
// Generates new random noise for this period
if(waveType == WaveType.Noise)
{
for(int n=0; n<32; n++)
noiseBuffer[n] = (float)random.NextDouble() * 2.0f - 1.0f;
}
}
// Gets the sample from the oscillator
switch(waveType)
{
case WaveType.Square: // Square wave
{
sample = ((phase / periodTemp) < squareDuty) ? 0.5f : -0.5f;
break;
}
case WaveType.Saw: // Saw wave
{
sample = 1.0f - (phase / periodTemp) * 2.0f;
break;
}
case WaveType.Sin: // Sine wave (fast and accurate approx)
{
pos = phase / periodTemp;
pos = pos > 0.5f ? (pos - 1.0f) * 6.28318531f : pos * 6.28318531f;
sample = pos < 0 ? 1.27323954f * pos + .405284735f * pos * pos : 1.27323954f * pos - 0.405284735f * pos * pos;
sample = sample < 0 ? .225f * (sample *-sample - sample) + sample : .225f * (sample * sample - sample) + sample;
break;
}
case WaveType.Noise: // Noise
{
sample = noiseBuffer[(phase * 32 / (int)periodTemp) % 32];
break;
}
}
// Applies the low and high pass filters
if (filters)
{
lpFilterOldPos = lpFilterPos;
lpFilterCutoff *= lpFilterDeltaCutoff;
if(lpFilterCutoff < 0.0f)
lpFilterCutoff = 0.0f;
else if(lpFilterCutoff > 0.1f)
lpFilterCutoff = 0.1f;
if(lpFilterOn)
{
lpFilterDeltaPos += (sample - lpFilterPos) * lpFilterCutoff;
lpFilterDeltaPos *= lpFilterDamping;
}
else
{
lpFilterPos = sample;
lpFilterDeltaPos = 0.0f;
}
lpFilterPos += lpFilterDeltaPos;
hpFilterPos += lpFilterPos - lpFilterOldPos;
hpFilterPos *= 1.0f - hpFilterCutoff;
sample = hpFilterPos;
}
// Applies the phaser effect
if (phaser)
{
phaserBuffer[phaserPos & 1023] = sample;
sample += phaserBuffer[(phaserPos - phaserInt + 1024) & 1023];
phaserPos = (phaserPos + 1) & 1023;
}
superSample += sample;
}
// Averages out the super samples and applies volumes
superSample = masterVolume * envelopeVolume * superSample * 0.125f;
// Clipping if too loud
if(superSample > 1.0f)
superSample = 1.0f;
else if(superSample < -1.0f)
superSample = -1.0f;
buffer.samples[counter] = (float)superSample;
_currentSynthesizedSample++;
}
_synthesizedBlocks.Enqueue(buffer);
}
//return new SoundEffect(byteSamples, 44100, AudioChannels.Mono);
this.IsCached = true;
this.IsReadyToPlay = true;
_currentSynthesizedSample = 0;
}
public void CacheSamples()
{
while (_currentSynthesizedSample < (uint)envelopeFullLength)
{
//TODO: error checking, exceptions, etc...
SynthesizedBuffer buffer = new SynthesizedBuffer();
buffer.samples = new float[this.BufferSize];
//initialize buffer
for (int i = 0; i < buffer.samples.Length; i++)
{
buffer.samples[i] = 0.0f;
}
bool finished = false;
//for (int i = 0; i < samples.Length; i++)
for (long counter = 0; counter < this.BufferSize; counter++)
{
if (finished)
{
break;
}
// Repeats every _repeatLimit times, partially resetting the sound parameters
if (repeatLimit != 0)
{
if (++repeatTime >= repeatLimit)
{
repeatTime = 0;
Reset(false);
}
}
// If _changeLimit is reached, shifts the pitch
if (changeLimit != 0)
{
if (++changeTime >= changeLimit)
{
changeLimit = 0;
period *= changeAmount;
}
}
// Acccelerate and apply slide
slide += deltaSlide;
period *= slide;
// Checks for frequency getting too low, and stops the sound if a minFrequency was set
if (period > maxPeriod)
{
period = maxPeriod;
if (minFrequency > 0.0)
{
finished = true;
}
}
periodTemp = period;
// Applies the vibrato effect
if (vibratoAmplitude > 0.0)
{
vibratoPhase += vibratoSpeed;
periodTemp = period * (float)(1.0 + Math.Sin(vibratoPhase) * vibratoAmplitude);
}
periodTemp = (int)periodTemp;
if (periodTemp < 8)
{
periodTemp = 8;
}
// Sweeps the square duty
if (waveType == 0)
{
squareDuty += dutySweep;
if (squareDuty < 0.0f)
{
squareDuty = 0.0f;
}
else if (squareDuty > 0.5f)
{
squareDuty = 0.5f;
}
}
// Moves through the different stages of the volume envelope
if (++envelopeTime > envelopeLength)
{
envelopeTime = 0;
switch (++envelopeStage)
{
case 1:
envelopeLength = envelopeLength1;
break;
case 2:
envelopeLength = envelopeLength2;
break;
}
}
// Sets the volume based on the position in the envelope
switch (envelopeStage)
{
case 0:
envelopeVolume = envelopeTime * envelopeOverLength0;
break;
case 1:
envelopeVolume = 1.0f + (1.0f - envelopeTime * envelopeOverLength1) * 2.0f * sustainPunch;
break;
case 2:
envelopeVolume = 1.0f - envelopeTime * envelopeOverLength2;
break;
case 3:
envelopeVolume = 0.0f;
finished = true;
break;
}
// Moves the phaser offset
if (phaser)
{
phaserOffset += phaserDeltaOffset;
phaserInt = (int)phaserOffset;
if (phaserInt < 0)
{
phaserInt = -phaserInt;
}
else if (phaserInt > 1023)
{
phaserInt = 1023;
}
}
// Moves the high-pass filter cutoff
if (filters && hpFilterDeltaCutoff != 0.0)
{
hpFilterCutoff *= hpFilterDeltaCutoff;
if (hpFilterCutoff < 0.00001f)
{
hpFilterCutoff = 0.00001f;
}
else if (hpFilterCutoff > 0.1f)
{
hpFilterCutoff = 0.1f;
}
}
superSample = 0.0f;
for (int j = 0; j < 8; j++)
{
// Cycles through the period
phase++;
if (phase >= periodTemp)
{
phase = phase - (int)periodTemp;
// Generates new random noise for this period
if (waveType == WaveType.Noise)
{
for (int n = 0; n < 32; n++)
{
noiseBuffer[n] = (float)random.NextDouble() * 2.0f - 1.0f;
}
}
}
// Gets the sample from the oscillator
switch (waveType)
{
case WaveType.Square: // Square wave
{
sample = ((phase / periodTemp) < squareDuty) ? 0.5f : -0.5f;
break;
}
case WaveType.Saw: // Saw wave
{
sample = 1.0f - (phase / periodTemp) * 2.0f;
break;
}
case WaveType.Sin: // Sine wave (fast and accurate approx)
{
pos = phase / periodTemp;
pos = pos > 0.5f ? (pos - 1.0f) * 6.28318531f : pos * 6.28318531f;
sample = pos < 0 ? 1.27323954f * pos + .405284735f * pos * pos : 1.27323954f * pos - 0.405284735f * pos * pos;
sample = sample < 0 ? .225f * (sample * -sample - sample) + sample : .225f * (sample * sample - sample) + sample;
break;
}
case WaveType.Noise: // Noise
{
sample = noiseBuffer[(phase * 32 / (int)periodTemp) % 32];
break;
}
}
// Applies the low and high pass filters
if (filters)
{
lpFilterOldPos = lpFilterPos;
lpFilterCutoff *= lpFilterDeltaCutoff;
if (lpFilterCutoff < 0.0f)
{
lpFilterCutoff = 0.0f;
}
else if (lpFilterCutoff > 0.1f)
{
lpFilterCutoff = 0.1f;
}
if (lpFilterOn)
{
lpFilterDeltaPos += (sample - lpFilterPos) * lpFilterCutoff;
lpFilterDeltaPos *= lpFilterDamping;
}
else
{
lpFilterPos = sample;
lpFilterDeltaPos = 0.0f;
}
lpFilterPos += lpFilterDeltaPos;
hpFilterPos += lpFilterPos - lpFilterOldPos;
hpFilterPos *= 1.0f - hpFilterCutoff;
sample = hpFilterPos;
}
// Applies the phaser effect
if (phaser)
{
phaserBuffer[phaserPos & 1023] = sample;
sample += phaserBuffer[(phaserPos - phaserInt + 1024) & 1023];
phaserPos = (phaserPos + 1) & 1023;
}
superSample += sample;
}
// Averages out the super samples and applies volumes
superSample = masterVolume * envelopeVolume * superSample * 0.125f;
// Clipping if too loud
if (superSample > 1.0f)
{
superSample = 1.0f;
}
else if (superSample < -1.0f)
{
superSample = -1.0f;
}
buffer.samples[counter] = (float)superSample;
_currentSynthesizedSample++;
}
_synthesizedBlocks.Enqueue(buffer);
}
//return new SoundEffect(byteSamples, 44100, AudioChannels.Mono);
this.IsCached = true;
this.IsReadyToPlay = true;
_currentSynthesizedSample = 0;
}