public Sf2Synth(Sf2File file, Table table, int voiceCount)
{
this.file = file;
this.table = table;
masterGain = 1;
this.voiceCount = voiceCount;
voices = new Voice[voiceCount];
for (int i = 0; i < voiceCount; i += 1)
{
voices[i].Init(i, file.data, table);
}
#if MIDIF_DEBUG_VISUALIZER
WaveVisualizer.Request(0, 1024);
WaveVisualizer.Request(1, 1024);
WaveVisualizer.Request(2, 1024);
WaveVisualizer.Request(3, 1024);
WaveVisualizer.Request(4, 1024);
WaveVisualizer.Request(5, 1024);
#endif
Reset();
}
public void Process(float[] data)
{
for (int i = 0, length = data.Length; i < length; i += 2)
{
float left = 0;
float right = 0;
for (int j = firstActiveVoice; j != -1; j = voices[j].next)
{
float envelopeGain = voices[j].envelope.gain;
voices[j].envelope.AdvanceTime(sampleRateRecip);
float value = envelopeGain * (float)Math.Sin(voices[j].time * voices[j].freq * Table.Pi2);
left += value * voices[j].gainLeft;
right += value * voices[j].gainRight;
voices[j].time += sampleRateRecip;
}
data[i] = left;
data[i + 1] = right;
#if MIDIF_DEBUG_VISUALIZER
WaveVisualizer.Push(0, left);
#endif
}
Panic();
}
public void Process(float[] buffer)
{
#if MIDIF_DEBUG_VISUALIZER
WaveVisualizer.Clear(0);
WaveVisualizer.Clear(1);
WaveVisualizer.Clear(2);
WaveVisualizer.Clear(3);
WaveVisualizer.Clear(5);
#endif
try {
for (int j = firstActiveVoice; j != -1; j = voices[j].next)
{
voices[j].Process(buffer);
#if MIDIF_DEBUG_VISUALIZER
WaveVisualizer.SetI(0, 0);
WaveVisualizer.SetI(1, 0);
WaveVisualizer.SetI(2, 0);
WaveVisualizer.SetI(3, 0);
WaveVisualizer.SetI(5, 0);
#endif
}
} catch (System.Exception e) {
UnityEngine.Debug.LogError(e);
Reset();
return;
}
#if MIDIF_DEBUG_VISUALIZER
for (int i = 0, length = buffer.Length; i < length; i += 2)
{
WaveVisualizer.Push(4, buffer[i]);
}
#endif
// Panic();
}
public MidiSynth(Table table, float sampleRate, int voiceCount)
{
#if MIDIF_DEBUG_VISUALIZER
WaveVisualizer.Request(0, 1024);
#endif
this.table = table;
this.sampleRate = sampleRate;
sampleRateRecip = 1f / sampleRate;
masterGain = 1;
envelopeConfig = new EnvelopeConfig(table, 120, .01f, 60, .1f, 100, .5f, 0, .01f);
this.voiceCount = voiceCount;
voices = new Voice[voiceCount];
for (int i = 0; i < voiceCount; i += 1)
{
voices[i].envelope = new Envelope(envelopeConfig);
}
Reset();
}
public void Process(float[] buffer)
{
float min = 0, max = 0;
for (int i = 0, length = buffer.Length; i < length; i += 2)
{
// the first iteration will call update with count = 0 so that filter, lfos, envs can init
bool lfoFlag = (count & lfoMask) == 0;
bool envFlag = (count & envMask) == 0;
// maybe more specific flags will be better?
if (lfoFlag || envFlag)
{
Update(lfoFlag, envFlag);
}
count += 1;
// simple interpolation
float value;
if (killed)
{
value = 0;
}
else
{
if (phase < 0)
{
UnityEngine.Debug.LogWarning("phase < 0");
Kill();
return;
}
uint uintPhase = (uint)phase;
float ut = (float)(phase - uintPhase);
value = data[start + uintPhase] * (1f - ut) + data[start + uintPhase + 1] * ut;
// Console.Log(phase, uintPhase, ut);
}
// filter even when fc > 13500 (set fc = 13500 when that happens) so that filter is always ready
if (useFilter)
{
value = filter.Process(value);
}
value = value * gain;
if (value < min)
{
min = value;
}
if (value > max)
{
max = value;
}
buffer[i] += value * channelGainLeft * panLeft;
buffer[i + 1] += value * channelGainRight * panRight;
#if MIDIF_DEBUG_VISUALIZER
WaveVisualizer.Inc(0, filter.h1 * attenuation);
WaveVisualizer.Inc(1, filter.h2 * attenuation);
WaveVisualizer.Inc(2, vibLfo.value * attenuation);
WaveVisualizer.Inc(3, modLfo.value * attenuation);
WaveVisualizer.Inc(5, data[start + (int)phase] * attenuation);
#endif
phase += curStep * channelPitch;
switch (mode)
{
case Sf2File.SampleMode.contLoop:
if (phase > loopEnd)
{
phase -= loopDuration;
}
break;
case Sf2File.SampleMode.contLoopRelease:
if (volEnv.stage == Envelope.StageRelease)
{
if (phase > duration)
{
Kill();
}
}
else
{
if (phase > loopEnd)
{
phase -= loopDuration;
}
}
break;
// case Sf2File.SampleMode.noLoop:
default:
if (phase > duration)
{
Kill();
}
break;
}
}
if (max - min > 3f)
{
UnityEngine.Debug.LogWarningFormat("max ({0:F2}) - min ({1:F2}) = ({2:F2})", max, min, max - min);
Kill();
}
}
