private int CYCLES_PER_SAMPLE = 0x300; //33868800 / 44100hz
public bool tick(int cycles)
{
counter += cycles;
if (counter < CYCLES_PER_SAMPLE)
{
return(false);
}
counter -= CYCLES_PER_SAMPLE;
if (cdbuffer.Count > 2)
{
byte cdLLo = cdbuffer.Dequeue();
byte cdLHi = cdbuffer.Dequeue();
byte cdRLo = cdbuffer.Dequeue();
byte cdRHi = cdbuffer.Dequeue();
samples.Add(cdLLo);
samples.Add(cdLHi);
samples.Add(cdRLo);
samples.Add(cdRHi);
}
if (samples.Count > 2048)
{
//Console.WriteLine("spu play!");
window.Play(samples.ToArray());
samples.Clear();
}
return(false);
}
private int CYCLES_PER_SAMPLE = 0x300; //33868800 / 44100hz
public bool tick(int cycles)
{
bool edgeTrigger = false;
counter += cycles;
if (counter < CYCLES_PER_SAMPLE)
{
return(false);
}
counter -= CYCLES_PER_SAMPLE;
int sumLeft = 0;
int sumRight = 0;
uint edgeKeyOn = keyOn;
uint edgeKeyOff = keyOff;
keyOn = 0;
keyOff = 0;
tickNoiseGenerator();
for (int i = 0; i < voices.Length; i++)
{
Voice v = voices[i];
//keyOn and KeyOff are edge triggered on 0 to 1
if ((edgeKeyOff & (0x1 << i)) != 0)
{
v.keyOff();
}
if ((edgeKeyOn & (0x1 << i)) != 0)
{
endx &= ~(uint)(0x1 << i);
v.keyOn();
}
if (v.adsrPhase == Voice.Phase.Off)
{
v.latest = 0;
continue;
}
short sample;
if ((channelNoiseMode & (0x1 << i)) != 0)
{
//Generated by tickNoiseGenerator
sample = (short)noiseLevel;
}
else
{
sample = sampleVoice(i);
//Read irqAddress Irq
edgeTrigger |= control.irq9Enabled && v.readRamIrq;
v.readRamIrq = false;
}
//Handle ADSR Envelope
sample = (short)((sample * v.adsrVolume) >> 15);
v.tickAdsr(i);
//Save sample for possible pitch modulation
v.latest = sample;
//Sum each voice sample
sumLeft += (sample * v.processVolume(v.volumeLeft)) >> 15;
sumRight += (sample * v.processVolume(v.volumeRight)) >> 15;
}
if (!control.spuUnmuted) //todo merge this on the for voice loop
//On mute the spu still ticks but output is 0 for voices (not for cdInput)
{
sumLeft = 0;
sumRight = 0;
}
//Merge in CD audio (CDDA or XA)
short cdL = 0;
short cdR = 0;
if (control.cdAudioEnabled && cdbuffer.Count > 3) //Be sure theres something on the queue...
//todo refactor the byte/short queues and casts
{
byte cdLLo = cdbuffer.Dequeue();
byte cdLHi = cdbuffer.Dequeue();
byte cdRLo = cdbuffer.Dequeue();
byte cdRHi = cdbuffer.Dequeue();
cdL = (short)(cdLHi << 8 | cdLLo);
cdR = (short)(cdRHi << 8 | cdRLo);
//Apply Spu Cd In (CDDA/XA) Volume
cdL = (short)((cdL * cdVolumeLeft) >> 15);
cdR = (short)((cdR * cdVolumeRight) >> 15);
sumLeft += cdL;
sumRight += cdR;
}
//Write to capture buffers and check ram irq
edgeTrigger |= handleCaptureBuffer(0 * 1024 + captureBufferPos, cdL);
edgeTrigger |= handleCaptureBuffer(1 * 1024 + captureBufferPos, cdR);
edgeTrigger |= handleCaptureBuffer(2 * 1024 + captureBufferPos, voices[1].latest);
edgeTrigger |= handleCaptureBuffer(3 * 1024 + captureBufferPos, voices[3].latest);
captureBufferPos = (captureBufferPos + 2) & 0x3FF;
//Clamp sum
sumLeft = (Math.Clamp(sumLeft, -0x8000, 0x7FFF) * mainVolumeLeft) >> 15;
sumRight = (Math.Clamp(sumRight, -0x8000, 0x7FFF) * mainVolumeRight) >> 15;
//Add to samples bytes to output list //Todo check if is possible to cast directly with Unsafe or memmarshal
spuOutput.Add((byte)sumLeft);
spuOutput.Add((byte)(sumLeft >> 8));
spuOutput.Add((byte)sumRight);
spuOutput.Add((byte)(sumRight >> 8));
if (spuOutput.Count > 2048)
{
window.Play(spuOutput.ToArray());
spuOutput.Clear();
}
if (control.spuEnabled && control.irq9Enabled && edgeTrigger)
{
status.irq9Flag = true;
}
return(control.spuEnabled && control.irq9Enabled && edgeTrigger); //todo move spuEnabled outside
}
public bool tick(int cycles)
{
counter += cycles;
if (interruptQueue.Count != 0 && IF == 0)
{
if (cdDebug)
{
Console.WriteLine($"[CDROM] Interrupt Queue is size: {interruptQueue.Count} dequeue to IF next Interrupt: {interruptQueue.Peek()}");
}
IF |= interruptQueue.Dequeue();
//edgeTrigger = true;
}
if (/*edgeTrigger &&*/ (IF & IE) != 0)
{
if (cdDebug)
{
Console.WriteLine($"[CD INT] Triggering {IF:x8}");
}
edgeTrigger = false;
isBusy = false;
return(true);
}
switch (mode)
{
case Mode.Idle:
if (interruptQueue.Count != 0) //Await some cycles so interrupts are not triggered instant
{
return(false);
}
counter = 0;
//Console.WriteLine("[CDROM] MODE IDLE");
break;
case Mode.Seek: //Hardcoded seek time...
if (counter < 100000 || interruptQueue.Count != 0)
{
return(false);
}
counter = 0;
//Console.WriteLine("[CDROM] MODE SEEK");
mode = Mode.Idle;
STAT = (byte)(STAT & (~0x40));
responseBuffer.Enqueue(STAT);
interruptQueue.Enqueue(0x2);
break;
case Mode.Read:
case Mode.Play:
if (counter < (33868800 / (isDoubleSpeed ? 150 : 75)) || interruptQueue.Count != 0)
{
return(false);
}
counter = 0;
byte[] rawSector = cd.Read(readLoc++);
if (cdDebug)
{
Console.ForegroundColor = ConsoleColor.DarkGreen;
Console.WriteLine($"Reading readLoc: {readLoc - 1} seekLoc: {seekLoc} size: {rawSector.Length}");
Console.ResetColor();
}
if (mode == Mode.Play)
{
window.Play(rawSector);
return(false); //CDDA isn't delivered to CPU and doesn't raise interrupt
}
//first 12 are the sync header
sectorHeader.mm = rawSector[12];
sectorHeader.ss = rawSector[13];
sectorHeader.ff = rawSector[14];
sectorHeader.mode = rawSector[15];
sectorSubHeader.file = rawSector[16];
sectorSubHeader.channel = rawSector[17];
sectorSubHeader.subMode = rawSector[18];
sectorSubHeader.codingInfo = rawSector[19];
//if (sectorSubHeader.isVideo) Console.WriteLine("is video");
//if (sectorSubHeader.isData) Console.WriteLine("is data");
//if (sectorSubHeader.isAudio) Console.WriteLine("is audio");
if (isXAADPCM && sectorSubHeader.isForm2)
{
if (sectorSubHeader.isEndOfFile)
{
if (cdDebug)
{
Console.WriteLine("[CDROM] XA ON: End of File!");
}
//is this even needed? There seems to not be an AutoPause flag like on CDDA
//RR4, Castlevania and others hang sound here if hard stoped to STAT 0x2
}
if (sectorSubHeader.isRealTime && sectorSubHeader.isAudio)
{
if (isXAFilter && (filterFile != sectorSubHeader.file || filterChannel != sectorSubHeader.channel))
{
if (cdDebug)
{
Console.WriteLine("[CDROM] XA Filter: file || channel");
}
return(false);
}
if (cdDebug)
{
Console.WriteLine("[CDROM] XA ON: Realtime + Audio"); //todo flag to pass to SPU?
}
byte[] decodedXaAdpcm = XaAdpcm.Decode(rawSector, sectorSubHeader.codingInfo);
window.Play(decodedXaAdpcm);
return(false);
}
}
//If we arived here sector is supposed to be delivered to CPU so slice out sync and header based on flag
if (!isSectorSizeRAW)
{
rawSector = rawSector.AsSpan().Slice(24, 0x800).ToArray();
}
else
{
rawSector = rawSector.AsSpan().Slice(12).ToArray();
}
cdBuffer = new Queue <byte>(rawSector);
responseBuffer.Enqueue(STAT);
interruptQueue.Enqueue(0x1);
break;
case Mode.TOC:
if (counter < 33868800 / (isDoubleSpeed ? 150 : 75) || interruptQueue.Count != 0)
{
return(false);
}
mode = Mode.Idle;
responseBuffer.Enqueue(STAT);
interruptQueue.Enqueue(0x2);
counter = 0;
break;
}
return(false);
}
