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AudioGeneratorNDS.cpp
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AudioGeneratorNDS.cpp
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//SDAT Player 1.3 FroggestSpirit
void readTemp(int bytes){
for(int ini=0; ini<bytes; ini++){
temp[ini]=sdat[filePos++];
}
}
void readTempKey(int bytes){
for(int ini=0; ini<bytes; ini++){
tempKey[ini]=sdat[filePos++];
}
}
#include "lookuptables.h"
#include "lfsr.h"
void NDSbuttonloop(){
infLoop^=1;
}
void NDSbuttonPause(){
paused^=1;
seqFrame=true;
}
void NDSbuttonNext(){
running = false;
}
void NDSbuttonShuffle(){
running = false;
}
bool NDS_loadSong(int id){//loads a song
int idi=id;
temp32=NDS_getAddress(sseqArray+(idi*4))+infoBlock;
while(temp32==infoBlock){
idi++;
song++;
if(idi>=totalSongs){
idi=0;
song=0;
}
temp32=NDS_getAddress(sseqArray+(idi*4))+infoBlock;
}
filePos=temp32;
readTemp(4);
sseqID=(temp[1]<<8);
sseqID=(sseqID+temp[0]);
printf("sseqID:%X\n",sseqID);
readTemp(4);
sbnkID=(temp[1]<<8);
sbnkID=(sbnkID+temp[0]);
temp32=NDS_getAddress(sbnkArray+(sbnkID*4))+infoBlock;
filePos=temp32;
readTemp(4);
sbnkID=(temp[1]<<8);
sbnkID=(sbnkID+temp[0]);
printf("sbnkID:%X\n",sbnkID);
readTemp(4);
swarID[0]=(temp[1]<<8);
swarID[0]=(swarID[0]+temp[0]);
swarID[1]=(temp[3]<<8);
swarID[1]=(swarID[1]+temp[2]);
readTemp(4);
swarID[2]=(temp[1]<<8);
swarID[2]=(swarID[2]+temp[0]);
swarID[3]=(temp[3]<<8);
swarID[3]=(swarID[3]+temp[2]);
for(int i=0; i<4; i++){
if(swarID[i]!=0xFFFF){
temp32=NDS_getAddress(swarArray+(swarID[i]*4))+infoBlock;
filePos=temp32;
readTemp(2);
swarID[i]=(temp[1]<<8);
swarID[i]=(swarID[i]+temp[0]);
}
}
printf("swarID 1:%X\n",swarID[0]);
printf("swarID 2:%X\n",swarID[1]);
printf("swarID 3:%X\n",swarID[2]);
printf("swarID 4:%X\n",swarID[3]);
sseqPointer=NDS_getAddress(fatArray+(sseqID*0x10));
dataOffset=sseqPointer+0x1C;
sbnkPointer=NDS_getAddress(fatArray+(sbnkID*0x10));
if(swarID[0]!=0xFFFF) swarPointer[0]=NDS_getAddress(fatArray+(swarID[0]*0x10));
if(swarID[1]!=0xFFFF) swarPointer[1]=NDS_getAddress(fatArray+(swarID[1]*0x10));
if(swarID[2]!=0xFFFF) swarPointer[2]=NDS_getAddress(fatArray+(swarID[2]*0x10));
if(swarID[3]!=0xFFFF) swarPointer[3]=NDS_getAddress(fatArray+(swarID[3]*0x10));
printf("sseqPointer:%X\n",sseqPointer);
printf("sbnkPointer:%X\n",sbnkPointer);
printf("swarPointer 1:%X\n",swarPointer[0]);
printf("swarPointer 2:%X\n",swarPointer[1]);
printf("swarPointer 3:%X\n",swarPointer[2]);
printf("swarPointer 4:%X\n",swarPointer[3]);
return true;
}
unsigned long NDS_getSampleAddress(unsigned char bank,unsigned short inst){//returns the absolute address of the SWAV header
filePos=swarPointer[bank]+(inst*4)+0x3C;
readTemp(4);
temp32=(temp[3]<<8);
temp32=((temp32+temp[2])<<8);
temp32=((temp32+temp[1])<<8);
temp32=(temp32+temp[0]);
return temp32+swarPointer[bank];
}
unsigned long NDS_getAddress(unsigned long addr){//returns the 4-byte address at addr
filePos=addr;
readTemp(4);
temp32=(temp[3]<<8);
temp32=((temp32+temp[2])<<8);
temp32=((temp32+temp[1])<<8);
temp32=(temp32+temp[0]);
return temp32;
}
bool NDS_decInst(int index){//decode samples to a buffer for faster playback (mostly for rasp-pi zero)
printf("%X,",index,instType[index]);
int keyiPointer=(index<<7);
if(instType[index]==0){//blank
return false;
}else if(instType[index]==2){//PSG
filePos=instAddress[index];
readTemp(4);
tempKey[0]=sdat[filePos++];
keySample[keyiPointer]=temp[0];
keyRootVal[keyiPointer]=keyRoot[keyiPointer]=tempKey[0];
keyRoot[keyiPointer]=FREQ_TABLE[(keyRoot[keyiPointer]<<7)];
decSWAVPointer[keyiPointer]=decSWAVFree;
decSWAVFree=NDS_decSample(keyiPointer,decSWAVFree,0);
filePos=instAddress[index]+5;
readTemp(4);
keyAttack[keyiPointer]=temp[0];
keyDecay[keyiPointer]=temp[1];
keySustain[keyiPointer]=temp[2];
keyRelease[keyiPointer]=temp[3];
temp[0]=sdat[filePos++];
keyPan[keyiPointer]=temp[0];
}else if(instType[index]==3){//Noise PSG
filePos=instAddress[index];
readTemp(4);
tempKey[0]=sdat[filePos++];
keySample[keyiPointer]=temp[0];
keyRootVal[keyiPointer]=keyRoot[keyiPointer]=tempKey[0];
keyRoot[keyiPointer]=FREQ_TABLE[(keyRoot[keyiPointer]<<7)];
decSWAVPointer[keyiPointer]=-1;//use a different table
filePos=instAddress[index]+5;
readTemp(4);
keyAttack[keyiPointer]=temp[0];
keyDecay[keyiPointer]=temp[1];
keySustain[keyiPointer]=temp[2];
keyRelease[keyiPointer]=temp[3];
temp[0]=sdat[filePos++];
keyPan[keyiPointer]=temp[0];
sampleFormat[keyiPointer]=3+temp[0];//store the PSG duty here
sampleLoops[keyiPointer]=true;
samplePitch[keyiPointer]=0x6E0;//This isn't divisible by 4, so we multiply the length of the 8-bit waveforms by 4
sampleLoop[keyiPointer]=0;
sampleLoopLength[keyiPointer]=0x7FFF;
sampleEnd[keyiPointer]=0x7FFF;
}else if(instType[index]<16){//single inst
filePos=instAddress[index];
readTemp(4);
tempKey[0]=sdat[filePos++];
keyBank[keyiPointer]=temp[2];
keySample[keyiPointer]=temp[0]+(temp[1]<<8);
keyRootVal[keyiPointer]=keyRoot[keyiPointer]=tempKey[0];
keyRoot[keyiPointer]=FREQ_TABLE[(keyRoot[keyiPointer]<<7)];
readTemp(4);
keyAttack[keyiPointer]=temp[0];
keyDecay[keyiPointer]=temp[1];
keySustain[keyiPointer]=temp[2];
keyRelease[keyiPointer]=temp[3];
temp[0]=sdat[filePos++];
keyPan[keyiPointer]=temp[0];
decSWAVPointer[keyiPointer]=decSWAVFree;
decSWAVFree=NDS_decSample(keyiPointer,decSWAVFree,NDS_getSampleAddress(keyBank[keyiPointer],keySample[keyiPointer]));
}else if(instType[index]==16){//range inst (like drumset)
filePos=instAddress[index];
readTempKey(2);
for(int keyi=tempKey[0]; keyi<=tempKey[1]; keyi++){
filePos=instAddress[index]+4+((keyi-tempKey[0])*12);
readTemp(4);
keyBank[keyiPointer+keyi]=temp[2];
keySample[keyiPointer+keyi]=temp[0]+(temp[1]<<8);
temp[0]=sdat[filePos++];
keyRootVal[keyiPointer+keyi]=keyRoot[keyiPointer+keyi]=temp[0];
keyRoot[keyiPointer+keyi]=FREQ_TABLE[(keyRoot[keyiPointer+keyi]<<7)];
readTemp(4);
keyAttack[keyiPointer+keyi]=temp[0];
keyDecay[keyiPointer+keyi]=temp[1];
keySustain[keyiPointer+keyi]=temp[2];
keyRelease[keyiPointer+keyi]=temp[3];
temp[0]=sdat[filePos++];
keyPan[keyiPointer+keyi]=temp[0];
decSWAVPointer[keyiPointer+keyi]=decSWAVFree;
decSWAVFree=NDS_decSample(keyiPointer+keyi,decSWAVFree,NDS_getSampleAddress(keyBank[keyiPointer+keyi],keySample[keyiPointer+keyi]));
}
}else if(instType[index]==17){//regional inst
filePos=instAddress[index];
readTempKey(8);
int key=0;
for(int keyi=0; keyi<8; keyi++){
if(key<=tempKey[keyi]){
filePos=instAddress[index]+10+(keyi*12);
readTemp(4);
keyBank[keyiPointer+key]=temp[2];
keySample[keyiPointer+key]=temp[0]+(temp[1]<<8);
temp[0]=sdat[filePos++];
keyRootVal[keyiPointer+key]=keyRoot[keyiPointer+key]=temp[0];
keyRoot[keyiPointer+key]=FREQ_TABLE[(keyRoot[keyiPointer+key]<<7)];
readTemp(4);
keyAttack[keyiPointer+key]=temp[0];
keyDecay[keyiPointer+key]=temp[1];
keySustain[keyiPointer+key]=temp[2];
keyRelease[keyiPointer+key]=temp[3];
temp[0]=sdat[filePos++];
keyPan[keyiPointer+key]=temp[0];
decSWAVPointer[keyiPointer+key]=decSWAVFree;
decSWAVFree=NDS_decSample(keyiPointer+key,decSWAVFree,NDS_getSampleAddress(keyBank[keyiPointer+key],keySample[keyiPointer+key]));
key++;
}
while(key<=tempKey[keyi]){
decSWAVPointer[keyiPointer+key]=decSWAVPointer[keyiPointer+(key-1)];
keyBank[keyiPointer+key]=keyBank[keyiPointer+(key-1)];
keySample[keyiPointer+key]=keySample[keyiPointer+(key-1)];
keyRoot[keyiPointer+key]=keyRoot[keyiPointer+(key-1)];
keyRootVal[keyiPointer+key]=keyRootVal[keyiPointer+(key-1)];
keyAttack[keyiPointer+key]=keyAttack[keyiPointer+(key-1)];
keyDecay[keyiPointer+key]=keyDecay[keyiPointer+(key-1)];
keySustain[keyiPointer+key]=keySustain[keyiPointer+(key-1)];
keyRelease[keyiPointer+key]=keyRelease[keyiPointer+(key-1)];
keyPan[keyiPointer+key]=keyPan[keyiPointer+(key-1)];
sampleFormat[keyiPointer+key]=sampleFormat[keyiPointer+(key-1)];
sampleLoops[keyiPointer+key]=sampleLoops[keyiPointer+(key-1)];
samplePitch[keyiPointer+key]=samplePitch[keyiPointer+(key-1)];
sampleLoop[keyiPointer+key]=sampleLoop[keyiPointer+(key-1)];
sampleLoopLength[keyiPointer+key]=sampleLoopLength[keyiPointer+(key-1)];
sampleEnd[keyiPointer+key]=sampleEnd[keyiPointer+(key-1)];
//sampleOffset[keyiPointer+key]=sampleOffset[keyiPointer+(key-1)];
key++;
}
}
}else{
return false;
}
return true;
}
int NDS_decSample(int ID, int freeSpace, unsigned long address){
if(address==0){//PSG
sampleFormat[ID]=3+temp[0];//store the PSG duty here
sampleLoops[ID]=true;
samplePitch[ID]=0x20B7;//This isn't divisible by 4, so we multiply the length of the 8-bit waveforms by 4
sampleLoop[ID]=0;
sampleLoopLength[ID]=32;//8*4=32
sampleEnd[ID]=32;//8*4=32
}else{//not PSG
filePos=address;
readTemp(4);
sampleFormat[ID]=temp[0];
sampleLoops[ID]=(temp[1]==1);
samplePitch[ID]=temp[2]+(temp[3]<<8);
readTemp(4);
sampleLoop[ID]=((temp[2]+(temp[3]<<8))<<2);
readTemp(4);
sampleLoopLength[ID]=(temp[3]<<26)+(temp[2]<<18)+(temp[1]<<10)+(temp[0]<<2);
sampleEnd[ID]=sampleLoop[ID]+sampleLoopLength[ID];
sampleOffset[ID]=address+12;//skip the header
}
if(sampleFormat[ID]==1){
sampleEnd[ID]/=2;
sampleLoop[ID]/=2;
sampleLoopLength[ID]/=2;
}else if(sampleFormat[ID]==2){
sampleEnd[ID]*=2;
sampleLoop[ID]*=2;
sampleLoopLength[ID]*=2;
readTemp(4);
sampleStepIndex=(temp[2]&0x7F);
samplePredictor=(temp[0]+(temp[1]<<8));
sampleStep=0;
sampleOutput[0]=samplePredictor;
sampleOffset[ID]+=4;//skip the ima-adpcm header
}
if(freeSpace+sampleEnd[ID]>=0x2000000){
printf("Out of sample buffer");
return false;
}
sampleNibbleLow=true;
samplePos[0]=0;
for(int sampI=0; sampI<sampleEnd[ID]; sampI++){
if(sampleFormat[ID]==2){///IMA-ADPCM
if(sampleNibbleLow){
filePos=sampleOffset[ID] + samplePos[0];
temp[0]=sdat[filePos++];
tempNibble=temp[0];
temp[1] = temp[0] & 7;//delta
sampleDiff = ADPCM_TABLE[sampleStepIndex+(temp[1]<<7)];
if (temp[0]&8){samplePredictor=max(samplePredictor-sampleDiff,-0x7FFF);}
else{samplePredictor=min(samplePredictor+sampleDiff,0x7FFF);}
sampleStepIndex=max(min(sampleStepIndex+INDEX_TABLE[temp[1]],88),0);
sampleNibbleLow=false;
}else{
temp[1] = tempNibble & 0x70;//delta
sampleDiff = ADPCM_TABLE[sampleStepIndex+(temp[1]<<3)];
if (tempNibble&0x80){samplePredictor=max(samplePredictor-sampleDiff,-0x7FFF);}
else{samplePredictor=min(samplePredictor+sampleDiff,0x7FFF);}
sampleStepIndex=max(min(sampleStepIndex+INDEX_TABLE[temp[1]>>4],88),0);
sampleNibbleLow=true;
samplePos[0]++;
}
decSWAVBuffer[freeSpace+sampI]=samplePredictor/float(0x080000);
}else if(sampleFormat[ID]==1){//16-bit PCM
filePos=sampleOffset[ID] + samplePos[0];
readTemp(2);
samplePos[0]+=2;
decSWAVBuffer[freeSpace+sampI]=(temp[0]+(temp[1]<<8))/float(0x080000);
}else if(sampleFormat[ID]==0){//8-bit PCM
filePos=sampleOffset[ID] + samplePos[0];
temp[0]=sdat[filePos++];
samplePos[0]++;
decSWAVBuffer[freeSpace+sampI]=(temp[0]<<8)/float(0x080000);
}else{
//sampleFormat[i] gets bit shifted twice, effectivly multiplying by 4
(samplePos[0])<((sampleFormat[ID]-2)<<2) ? decSWAVBuffer[freeSpace+sampI]=0x7FFF/float(0x080000) : decSWAVBuffer[freeSpace+sampI]=0x0000/float(0x080000);
samplePos[0]++;
}
}
return freeSpace+(sampleEnd[ID]);
}
bool NDS_begin(int songID, int sRate, bool inf)
{
running=false;
sampleRate=sRate;
filePos=0;
// Set the output values properly
delayHit=false;
tempoFill=0;
usedTracks=0xFFFF;
sseqTempo=120;
sseqVol=0x7F;
fadeVol=0;
maxLoops=2;
infLoop=inf;
mixer[0]=0;
mixer[1]=0;
soundOut[0]=0;
soundOut[1]=0;
//Read SDAT header
filePos=0x0E;
readTemp(2);
printf("numBlocks:%X\n",temp[0]);
headerSize=0x38;
if (temp[0]==4){//has a SYMB block
readTemp(4);//skip 8 bytes
readTemp(4);
headerSize=0x40;
}
readTemp(4);
infoBlock=(temp[3]<<8);
infoBlock=((infoBlock+temp[2])<<8);
infoBlock=((infoBlock+temp[1])<<8);
infoBlock=(infoBlock+temp[0]);
printf("infoBlock:%X\n",infoBlock);
readTemp(4);//skip 4 bytes
readTemp(4);
fatArray=(temp[3]<<8);
fatArray=((fatArray+temp[2])<<8);
fatArray=((fatArray+temp[1])<<8);
fatArray=(fatArray+temp[0]);
fatArray+=12;
printf("fatArray:%X\n",fatArray);
filePos=infoBlock+8;
readTemp(4);
sseqArray=(temp[3]<<8);
sseqArray=((sseqArray+temp[2])<<8);
sseqArray=((sseqArray+temp[1])<<8);
sseqArray=(sseqArray+temp[0]);
sseqArray+=infoBlock+4;
totalSongs=NDS_getAddress(sseqArray-4);
printf("sseqArray:%X\n",sseqArray);
filePos=infoBlock+0x10;
readTemp(4);
sbnkArray=(temp[3]<<8);
sbnkArray=((sbnkArray+temp[2])<<8);
sbnkArray=((sbnkArray+temp[1])<<8);
sbnkArray=(sbnkArray+temp[0]);
sbnkArray+=infoBlock+4;
printf("sbnkArray:%X\n",sbnkArray);
readTemp(4);
swarArray=(temp[3]<<8);
swarArray=((swarArray+temp[2])<<8);
swarArray=((swarArray+temp[1])<<8);
swarArray=(swarArray+temp[0]);
swarArray+=infoBlock+4;
printf("swarArray:%X\n",swarArray);
for (int i=0; i<16; i++) {
timesLooped[i]=maxLoops;
chPointer[i]=0;
slotChannel[i]=0;
slotFree[i]=0;
slotNote[i]=0;
slotNoteVel[i]=0;
slotNoteLen[i]=0;
chDelay[i]=0;
chInstrument[i]=0;
chPan[i]=0x40;
chPanL[i]=0;
chPanR[i]=0;
chVol[i]=0x7F;
chTranspose[i]=0;
chPitchBendCur[i]=0;
chPitchBend[i]=0;
chPitchBendRange[i]=2;
chSweepPitch[i]=0;
chPriority[i]=0;
chPolyMono[i]=0;
chTie[i]=0;
chPort[i]=0;
chPortOn[i]=0;
chPortTime[i]=0;
chModDelay[i]=0;
chModDepth[i]=0;
chModSpeed[i]=0;
chModType[i]=0;
chModRange[i]=0;
chAttack[i]=0;
chDecay[i]=0;
chSustain[i]=0;
chRelease[i]=0;
chLoopTimes[i]=0;
chLoopOffset[i]=0;
chReturnOffset[i]=0;
chInCall[i]=false;
chActive[i]=false;
sampleOffset[i]=0;
tempNibble=0;
slotMidiFreq[i]=0;
slotPitch[i]=0;
slotPitchFill[i]=0;
samplePitchFill[i]=0;
chInstrument[i]=0;
sampleDone[i]=true;
}
sseqIndex=songID;
NDS_loadSong(sseqIndex);
//read sseq header
filePos=dataOffset;
readTemp(3);
usedTracks=(temp[2]<<8)+temp[1];
chPointer[0]=dataOffset+3;
for(int i=1; i<16; i++){
if((usedTracks&(1<<i))!=0){
temp[0]=sdat[filePos++];//read 0x93 channel pointer command
readTemp(4);//read channel number and pointer
chPointer[temp[0]]=(temp[3]<<16)+(temp[2]<<8)+temp[1]+dataOffset;
chPointer[0]+=5;
chActive[temp[0]]=true;
timesLooped[temp[0]]=0;
}
}
//read sbnk header
filePos=sbnkPointer+0x38;
readTemp(4);
temp32=(temp[3]<<8);
temp32=((temp32+temp[2])<<8);
temp32=((temp32+temp[1])<<8);
temp32=(temp32+temp[0]);
if(temp32>128){//bounds check
temp32=128;
}
int numInsts=temp32;
decSWAVFree=0;
for(int i=0; i<numInsts; i++){
readTemp(4);
instAddress[i]=(temp[3]<<8);
instAddress[i]=((instAddress[i]+temp[2])<<8);
instAddress[i]=(instAddress[i]+temp[1]);
instAddress[i]+=sbnkPointer;
instType[i]=temp[0];
}
printf("Decoding Instruments: ");
for(int i=0; i<numInsts; i++) validInst[i]=NDS_decInst(i);
printf("\nDone!\n");
printf("Inst Buffer:0x%X/0x4000000\n",(decSWAVFree*2));
//read swar header
chActive[0]=true;
printf("%X chPointer 0:%X\n",chActive[0],chPointer[0]);
printf("%X chPointer 1:%X\n",chActive[1],chPointer[1]);
printf("%X chPointer 2:%X\n",chActive[2],chPointer[2]);
printf("%X chPointer 3:%X\n",chActive[3],chPointer[3]);
printf("%X chPointer 4:%X\n",chActive[4],chPointer[4]);
printf("%X chPointer 5:%X\n",chActive[5],chPointer[5]);
printf("%X chPointer 6:%X\n",chActive[6],chPointer[6]);
printf("%X chPointer 7:%X\n",chActive[7],chPointer[7]);
printf("%X chPointer 8:%X\n",chActive[8],chPointer[8]);
printf("%X chPointer 9:%X\n",chActive[9],chPointer[9]);
printf("%X chPointer A:%X\n",chActive[10],chPointer[10]);
printf("%X chPointer B:%X\n",chActive[11],chPointer[11]);
printf("%X chPointer C:%X\n",chActive[12],chPointer[12]);
printf("%X chPointer D:%X\n",chActive[13],chPointer[13]);
printf("%X chPointer E:%X\n",chActive[14],chPointer[14]);
printf("%X chPointer F:%X\n",chActive[15],chPointer[15]);
running = true;
return true;
}
bool NDS_stop()
{
running = false;
return true;
}
float * NDS_loop(){
seqFrame=false;
static int c = 0;
//sample processing
if (!running) return 0; // Nothing to do here!
c+=192;
while(c>=sampleRate){//player update
c-=sampleRate;
seqFrame=true;
if(fadeVol<0){
fadeVol--;
if(fadeVol<=-723) running = false;
if (!running) return 0;
}
tempoFill+=sseqTempo;
while(tempoFill>=240){
tempoFill-=240;
for(int i=0; i<16; i++){
if(chActive[i]){
if(chDelay[i]==0){
delayHit=false;
while(!delayHit){
filePos=chPointer[i];
temp[0]=sdat[filePos++];
switch(temp[0]){
case 0xFE: //Multitrack
readTemp(2);
usedTracks=(temp[1]<<8)+temp[0];
chPointer[i]+=3;
break;
case 0x93: //Track Start
//printf("%X Undefined Instruction 0x93 at: %X\n",i,filePos-1);
readTemp(4);
chPointer[i]+=5;
break;
case 0x80: //Rest
delayHit=true;
readTemp(4);
chDelay[i]=(temp[0]&0x7F);
varLength=2;
for(int j=0; j<3; j++){
if(temp[j]>0x7F){
chDelay[i]=(chDelay[i]<<7);
chDelay[i]+=(temp[j+1]&0x7F);
varLength++;
}else{
j=3;
}
}
chPointer[i]+=varLength;
break;
case 0x81: //Instrument Change
readTemp(4);
if(chInstrument[i]!=(temp[0]&0x7F)){
chInstrument[i]=temp[0]&0x7F;
//if(validInst[chInstrument[i]]) NDS_setInst(i,chInstrument[i]);
//if(validInst[i]) printf("%X Instrument: %X Set %X\n",i,chInstrument[i],filePos-4);
//if(!validInst[chInstrument[i]]) printf("%X Invalid Instrument: %X? %X\n",i,chInstrument[i],filePos-4);
}
varLength=2;
for(int j=0; j<3; j++){
if(temp[j]>0x7F){
varLength++;
}else{
j=3;
}
}
chPointer[i]+=varLength;
break;
case 0x94: //Jump
readTemp(3);
chPointer[i]=(temp[2]<<16)+(temp[1]<<8)+temp[0]+dataOffset;
if(timesLooped[i]<maxLoops)timesLooped[i]++;
loopi=0;
while(timesLooped[loopi]>=maxLoops && loopi<16) loopi++;
if(loopi==16 && fadeVol==0 && !infLoop) fadeVol--;
break;
case 0x95: //Call
readTemp(3);
chReturnOffset[i]=chPointer[i]+4;
chInCall[i]=true;
chPointer[i]=(temp[2]<<16)+(temp[1]<<8)+temp[0]+dataOffset;
break;
case 0xFD: //Return
if(chInCall[i]){
chPointer[i]=chReturnOffset[i];
chInCall[i]=false;
}else{
chPointer[i]++;
}
break;
case 0xC0: //Pan
temp[0]=sdat[filePos++];
chPan[i]=temp[0];
chPanL[i]=PAN_TABLE[temp[0]];
chPanR[i]=PAN_TABLE[127-temp[0]];
chPointer[i]+=2;
break;
case 0xC1: //Volume
temp[0]=sdat[filePos++];
chVol[i]=NDS_Cnv_dB(temp[0]);
chPointer[i]+=2;
break;
case 0xC2: //Master Volume
//printf("%X Undefined Instruction 0xC2 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
sseqVol=temp[0];
chPointer[i]+=2;
break;
case 0xC3: //Transpose
//printf("%X Undefined Instruction 0xC3 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chTranspose[i]=temp[0];
chPointer[i]+=2;
break;
case 0xC4: //Pitch Bend
temp[0]=sdat[filePos++];
chPitchBend[i]=(temp[0]);
chPointer[i]+=2;
if(chPitchBend[i]>128) chPitchBendCur[i]=((chPitchBend[i]-256)*chPitchBendRange[i]);
if(chPitchBend[i]<=128) chPitchBendCur[i]=(chPitchBend[i]*chPitchBendRange[i]);
break;
case 0xC5: //Pitch Bend Range
temp[0]=sdat[filePos++];
chPitchBendRange[i]=temp[0];
chPointer[i]+=2;
if(chPitchBend[i]>128) chPitchBendCur[i]=((chPitchBend[i]-256)*chPitchBendRange[i]);
if(chPitchBend[i]<=128) chPitchBendCur[i]=(chPitchBend[i]*chPitchBendRange[i]);
break;
case 0xC6: //Track Priority
//printf("%X Undefined Instruction 0xC6 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chPriority[i]=temp[0];
chPointer[i]+=2;
break;
case 0xC7: //Poly/Mono
//printf("%X Undefined Instruction 0xC7 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chPolyMono[i]=temp[0];
chPointer[i]+=2;
break;
case 0xC8: //Tie (?)
//printf("%X Undefined Instruction 0xC8 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chTie[i]=temp[0];
chPointer[i]+=2;
break;
case 0xC9: //Port Control
//printf("%X Undefined Instruction 0xC9 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chPort[i]=temp[0];
chPointer[i]+=2;
break;
case 0xCA: //Mod Depth
//printf("%X Undefined Instruction 0xCA at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chModDepth[i]=temp[0];
chPointer[i]+=2;
break;
case 0xCB: //Mod Speed
//printf("%X Undefined Instruction 0xCB at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chModSpeed[i]=temp[0];
chPointer[i]+=2;
break;
case 0xCC: //Mod Type
//printf("%X Undefined Instruction 0xCC at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chModType[i]=temp[0];
chPointer[i]+=2;
break;
case 0xCD: //Mod Range
//printf("%X Undefined Instruction 0xCD at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chModRange[i]=temp[0];
chPointer[i]+=2;
break;
case 0xCE: //Port On/Off
//printf("%X Undefined Instruction 0xCE at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chPortOn[i]=temp[0];
chPointer[i]+=2;
break;
case 0xCF: //Port Time
//printf("%X Undefined Instruction 0xCF at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chPortTime[i]=temp[0];
chPointer[i]+=2;
break;
case 0xD0: //Attack Rate
//printf("%X Undefined Instruction 0xD0 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chAttack[i]=temp[0];
chPointer[i]+=2;
break;
case 0xD1: //Decay Rate
//printf("%X Undefined Instruction 0xD1 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chDecay[i]=temp[0];
chPointer[i]+=2;
break;
case 0xD2: //Sustain Rate
//printf("%X Undefined Instruction 0xD2 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chSustain[i]=temp[0];
chPointer[i]+=2;
break;
case 0xD3: //Release Rate
//printf("%X Undefined Instruction 0xD3 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chRelease[i]=temp[0];
chPointer[i]+=2;
break;
case 0xD4: //Loop Start Marker
temp[0]=sdat[filePos++];
chLoopTimes[i]=temp[0];
chPointer[i]+=2;
chLoopOffset[i]=chPointer[i];
break;
case 0xFC: //Loop End Marker
if(chLoopTimes[i]>0){
chLoopTimes[i]--;
chPointer[i]=chLoopOffset[i];
}else{
chPointer[i]++;
}
break;
case 0xD5: //Expression
//printf("%X Undefined Instruction 0xD5 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chPointer[i]+=2;
break;
case 0xD6: //Print Variable
//printf("%X Undefined Instruction 0xD6 at: %X\n",i,filePos-1);
temp[0]=sdat[filePos++];
chPointer[i]+=2;
break;
case 0xE0: //Mod Delay
//printf("%X Undefined Instruction 0xE0 at: %X\n",i,filePos-1);
readTemp(2);
chModDelay[i]=(temp[1]<<8)+temp[0];
chPointer[i]+=3;
break;
case 0xE1: //Tempo
readTemp(2);
sseqTempo=(temp[1]<<8)+temp[0];
chPointer[i]+=3;
break;
case 0xE3: //Sweep Pitch
//printf("%X Undefined Instruction 0xE3 at: %X\n",i,filePos-1);
readTemp(2);
chPointer[i]+=3;
break;
case 0xFF: //End of Track
chActive[i]=false;
delayHit=true;
timesLooped[i]=maxLoops;
loopi=0;
while(timesLooped[loopi]>=maxLoops && loopi<16) loopi++;
if(loopi==16) running=false;
break;
default: //
if(temp[0]<0x80){//Note on
curSlot=0xFF;
for(int slot=0; slot<16; slot++){
if(slotFree[slot]==0){//check for free slots
curSlot=slot;
slot=16;
}
}
if(curSlot==0xFF){
for(int slot=0; slot<16; slot++){
if(slotFree[slot]==1){//if free slots are unavailable, check for slot in release state
curSlot=slot;
slot=16;
}
}
}
if(curSlot<0xFF){
slotChannel[curSlot]=i;
slotFree[curSlot]=2;
slotNote[curSlot]=temp[0];
slotMidiFreq[curSlot]=(slotNote[curSlot]<<7);
temp[0]=sdat[filePos++];
slotNoteVel[curSlot]=NDS_Cnv_dB(temp[0]);
varLength=3;
readTemp(4);
slotNoteLen[curSlot]=(temp[0]&0x7F);
samplePos[curSlot]=0;
for(int j=0; j<3; j++){
if(temp[j]>0x7F){
slotNoteLen[curSlot]=(slotNoteLen[curSlot]<<7);
slotNoteLen[curSlot]+=(temp[j+1]&0x7F);
varLength++;
}else{
j=3;
}
}
if(instType[chInstrument[i]]>=16){
if(validInst[chInstrument[i]]){
slotSampleID[curSlot]=(chInstrument[i]<<7)+slotNote[curSlot];
sampleOffset[curSlot]=decSWAVPointer[slotSampleID[curSlot]];
slotPitch[curSlot]=keyRoot[slotSampleID[curSlot]];
curKeyRoot[curSlot]=keyRoot[slotSampleID[curSlot]];
slotAttack[curSlot]=NDS_Cnv_Attack(keyAttack[slotSampleID[curSlot]]);
slotDecay[curSlot]=NDS_Cnv_Fall(keyDecay[slotSampleID[curSlot]]);
slotSustain[curSlot]=NDS_Cnv_Sust(keySustain[slotSampleID[curSlot]]);
slotRelease[curSlot]=NDS_Cnv_Fall(keyRelease[slotSampleID[curSlot]]);
slotPan[curSlot]=keyPan[slotSampleID[curSlot]];
}//else printf("%X Invalid Instrument? %X\n",i,filePos-4);
}else if(instType[chInstrument[i]]==1){
if(validInst[chInstrument[i]]){
slotSampleID[curSlot]=(chInstrument[i]<<7);
sampleOffset[curSlot]=decSWAVPointer[slotSampleID[curSlot]];
slotPitch[curSlot]=keyRoot[slotSampleID[curSlot]];
curKeyRoot[curSlot]=keyRoot[slotSampleID[curSlot]];
slotAttack[curSlot]=NDS_Cnv_Attack(keyAttack[slotSampleID[curSlot]]);
slotDecay[curSlot]=NDS_Cnv_Fall(keyDecay[slotSampleID[curSlot]]);
slotSustain[curSlot]=NDS_Cnv_Sust(keySustain[slotSampleID[curSlot]]);
slotRelease[curSlot]=NDS_Cnv_Fall(keyRelease[slotSampleID[curSlot]]);
slotPan[curSlot]=keyPan[slotSampleID[curSlot]];
}//else printf("%X Invalid Instrument? %X\n",i,filePos-4);
}else{//PSG
slotSampleID[curSlot]=(chInstrument[i]<<7);
sampleOffset[curSlot]=decSWAVPointer[slotSampleID[curSlot]];
slotPitch[curSlot]=keyRoot[slotSampleID[curSlot]];
curKeyRoot[curSlot]=keyRoot[slotSampleID[curSlot]];
slotAttack[curSlot]=NDS_Cnv_Attack(keyAttack[slotSampleID[curSlot]]);
slotDecay[curSlot]=NDS_Cnv_Fall(keyDecay[slotSampleID[curSlot]]);
slotSustain[curSlot]=NDS_Cnv_Sust(keySustain[slotSampleID[curSlot]]);
slotRelease[curSlot]=NDS_Cnv_Fall(keyRelease[slotSampleID[curSlot]]);
slotPan[curSlot]=keyPan[slotSampleID[curSlot]];
}
sampleOutput[curSlot]=0;
sampleDone[curSlot]=true;
samplePos[curSlot]=0;
slotADSRState[curSlot]=0;
slotADSRVol[curSlot]=-92544;
max(slotPanL[curSlot]=chPanL[i]+PAN_TABLE[slotPan[curSlot]],-723);
max(slotPanR[curSlot]=chPanR[i]+PAN_TABLE[127-slotPan[curSlot]],-723);
if(validInst[chInstrument[i]]) sampleDone[curSlot]=false;
samplePitchFill[curSlot]=sampleRate;
slotPitchFill[curSlot]=curKeyRoot[curSlot];
}else{
temp[0]=sdat[filePos++];
varLength=3;
readTemp(4);
for(int j=0; j<3; j++){
if(temp[j]>0x7F){
varLength++;
}else{
j=3;
}
}
}
chPointer[i]+=varLength;
//if(i==0) printf("Note:%X Length:%X\n",slotNote[curSlot],slotNoteLen[curSlot]);
}else if(temp[0]>=0xA0 && temp[0]<0xC0){//Arithmetic operations
//printf("%X Undefined Instruction 0x%X at: %X\n",temp[0],filePos-1);
running=false;
delayHit=true;
}else{
//printf("Illegal Instruction 0x%X at: %X\n",temp[0],filePos-1);
running=false;
delayHit=true;
}
break;
}
}
}
if(chDelay[i]>0) chDelay[i]-=1;//change this
}
}
for(int i=0; i<16; i++){
if(slotNoteLen[i]>0){
slotNoteLen[i]-=1;//change this
}else if(slotADSRState[i]<3){
slotFree[i]=1;
slotADSRState[i]=3;
slotADSRVol[i]=slotSustain[i];
}
}
}
for(int i=0; i<16; i++){
switch(slotADSRState[i]){
case 0:
slotADSRVol[i]=((slotADSRVol[i]*slotAttack[i])/255);
if(slotADSRVol[i]<0) break;
slotADSRState[i]++;
break;
case 1:
slotADSRVol[i]-=slotDecay[i];
if(slotADSRVol[i]>slotSustain[i]) break;
slotADSRState[i]++;
case 2:
slotADSRVol[i]=slotSustain[i];
break;
case 3:
slotADSRVol[i]-=slotRelease[i];
if(slotADSRVol[i]>-92544) break;
slotADSRVol[i]=-92544;
slotADSRState[i]++;
sampleDone[i]=true;
slotFree[i]=0;
break;
}
volModL[i]=NDS_Cnv_Vol(fadeVol+slotNoteVel[i]+(slotADSRVol[i]>>7)+chVol[slotChannel[i]]+slotPanL[i])/256.0f;
volModR[i]=NDS_Cnv_Vol(fadeVol+slotNoteVel[i]+(slotADSRVol[i]>>7)+chVol[slotChannel[i]]+slotPanR[i])/256.0f;
}
}
mixer[0]=0;
mixer[1]=0;
for(int i=0; i<16; i++){//process each slot
if(slotFree[i]!=0 && !sampleDone[i]){
signed long tune=slotMidiFreq[i]+chPitchBendCur[slotChannel[i]];
if(tune<0) tune=0;
if(tune>=0x4000){
//printf("Freq to high:%X\n",tune);
tune=0x3FFF;
}
tune=FREQ_TABLE[tune];
if(curKeyRoot[i]>0){
if(sampleOffset[i]==-1){
soundChannel4Bit = int(samplePos[i]) & 7;
sampleOutput[i]=(((lfsr15[int(samplePos[i]/8)] << soundChannel4Bit) & 0x80) >> 7) * (0x7FFF/float(0x080000));
samplePos[i]+=((samplePitch[slotSampleID[i]]*(tune/curKeyRoot[i]))/sampleRate);
}else{
sampleOutput[i]=decSWAVBuffer[int(samplePos[i]+sampleOffset[i])];
samplePos[i]+=((samplePitch[slotSampleID[i]]*(tune/curKeyRoot[i]))/sampleRate);
}
if(samplePos[i]>=sampleEnd[slotSampleID[i]]){
if(sampleLoops[slotSampleID[i]]){
samplePos[i]=sampleLoop[slotSampleID[i]]+fmod((samplePos[i]-sampleLoop[slotSampleID[i]]),sampleLoopLength[slotSampleID[i]]);
}else{
sampleDone[i]=true;
slotFree[i]=0;
}
}
}
mixer[0]+=(sampleOutput[i]*volModL[i]);//left
mixer[1]+=(sampleOutput[i]*volModR[i]);//right
}
}
soundOut[0]=mixer[0];
soundOut[1]=mixer[1];
return soundOut;
}