public PanComponent(float value, PanFormulaEnum formula)
{
value = SynthHelper.Clamp(value, -1f, 1f);
switch (formula)
{
case PanFormulaEnum.Neg3dBCenter:
{
double dvalue = Synthesizer.HalfPi * (value + 1f) / 2f;
Left = (float)Math.Cos(dvalue);
Right = (float)Math.Sin(dvalue);
}
break;
case PanFormulaEnum.Neg6dBCenter:
{
Left = .5f + value * -.5f;
Right = .5f + value * .5f;
}
break;
case PanFormulaEnum.ZeroCenter:
{
double dvalue = Synthesizer.HalfPi * (value + 1.0) / 2.0;
Left = (float)(Math.Cos(dvalue) / Synthesizer.InverseSqrtOfTwo);
Right = (float)(Math.Sin(dvalue) / Synthesizer.InverseSqrtOfTwo);
}
break;
default:
throw new Exception("Invalid pan law selected.");
}
}
public Synthesizer(int sampleRate, int audioChannels, int bufferSize, int bufferCount, int polyphony)
{
const int MinSampleRate = 8000;
const int MaxSampleRate = 96000;
//Setup synth parameters
if (sampleRate < MinSampleRate || sampleRate > MaxSampleRate)
{
throw new ArgumentException("Invalid paramater: (sampleRate) Valid ranges are " + MinSampleRate + " to " + MaxSampleRate, "sampleRate");
}
this.sampleRate = sampleRate;
if (audioChannels < 1 || audioChannels > 2)
{
throw new ArgumentException("Invalid paramater: (audioChannels) Valid ranges are " + 1 + " to " + 2, "audioChannels");
}
this.audioChannels = audioChannels;
this.microBufferSize = SynthHelper.Clamp(bufferSize, (int)(MinBufferSize * sampleRate), (int)(MaxBufferSize * sampleRate));
this.microBufferSize = (int)Math.Ceiling(this.microBufferSize / (double)DefaultBlockSize) * DefaultBlockSize; //ensure multiple of block size
this.microBufferCount = Math.Max(1, bufferCount);
sampleBuffer = new float[microBufferSize * microBufferCount * audioChannels];
littleEndian = true;
//Setup Controllers
synthChannels = new SynthParameters[DefaultChannelCount];
for (int x = 0; x < synthChannels.Length; x++)
{
synthChannels[x] = new SynthParameters(this);
}
//Create synth voices
voiceManager = new VoiceManager(SynthHelper.Clamp(polyphony, MinPolyphony, MaxPolyphony));
//Create midi containers
midiEventQueue = new Queue <MidiMessage>();
midiEventCounts = new int[this.microBufferCount];
layerList = new Patch[15];
}
public void SetAudioChannelCount(int channels)
{
channels = SynthHelper.Clamp(channels, 1, 2);
if (audioChannels != channels)
{
audioChannels = channels;
sampleBuffer = new float[microBufferSize * microBufferCount * audioChannels];
}
}
public Synthesizer(int sampleRate, int audioChannels, int bufferSize, int bufferCount, int polyphony)
{
const int MinSampleRate = 8000;
const int MaxSampleRate = 96000;
//Setup synth parameters
if (sampleRate < MinSampleRate || sampleRate > MaxSampleRate)
{
throw new ArgumentException("Invalid paramater: (sampleRate) Valid ranges are " + MinSampleRate + " to " + MaxSampleRate, "sampleRate");
}
this.sampleRate = sampleRate;
if (audioChannels < 1 || audioChannels > 2)
{
throw new ArgumentException("Invalid paramater: (audioChannels) Valid ranges are " + 1 + " to " + 2, "audioChannels");
}
this.audioChannels = audioChannels;
this.microBufferSize = SynthHelper.Clamp(bufferSize, (int)(MinBufferSize * sampleRate), (int)(MaxBufferSize * sampleRate));
this.microBufferSize = (int)Math.Ceiling(this.microBufferSize / (double)DefaultBlockSize) * DefaultBlockSize; //ensure multiple of block size
this.microBufferCount = Math.Max(1, bufferCount);
sampleBuffer = new float[microBufferSize * microBufferCount * audioChannels];
littleEndian = true;
//Setup Controllers
bankSelect = new int[DefaultChannelCount];
programs = new int[DefaultChannelCount];
channelPressure = new float[DefaultChannelCount];
pan = new short[DefaultChannelCount];
volume = new short[DefaultChannelCount];
expression = new short[DefaultChannelCount];
modRange = new short[DefaultChannelCount];
pitchBend = new short[DefaultChannelCount];
pitchBendRange = new short[DefaultChannelCount];
masterCoarseTune = new short[DefaultChannelCount];
masterFineTune = new short[DefaultChannelCount];
holdPedal = new bool[DefaultChannelCount];
rpn = new short[DefaultChannelCount];
modWheel = new double[DefaultChannelCount];
panPositions = new PanComponent[DefaultChannelCount];
totalPitch = new int[DefaultChannelCount];
totalVolume = new float[DefaultChannelCount];
//set controls to default values
ResetSynthControls();
//create synth voices
voiceManager = new VoiceManager(SynthHelper.Clamp(polyphony, MinPolyphony, MaxPolyphony), this);
//create midi containers
midiEventQueue = new Queue <MidiMessage>();
midiEventCounts = new int[this.microBufferCount];
}
private void ConvertWorkingBuffer(byte[] to, float[] from)
{
if (littleEndian)
{
for (int x = 0, i = 0; x < from.Length; x++, i += 2)
{
short sample = (short)SynthHelper.Clamp(from[x] * mainVolume * 32768f, -32768f, 32767f);
to[i] = (byte)sample;
to[i + 1] = (byte)(sample >> 8);
}
}
else
{
for (int x = 0, i = 0; x < from.Length; x++, i += 2)
{
short sample = (short)SynthHelper.Clamp(from[x] * mainVolume * 32768f, -32768f, 32767f);
to[i] = (byte)(sample >> 8);
to[i + 1] = (byte)sample;
}
}
}
