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src.rivoreo.one / audio / dosmid / a01ae39ccfecb4b8c7906779f0e3aea3ecfe380b / . / cms.c
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#ifdef CMS
//#define CMS_DEBUG // verbose to CMSLOG.TXT debug file
//#define DRUMS_ONLY // for percussion debug purpouses
#include "cms.h"
#include <conio.h>
#ifdef CMS_DEBUG
#include <stdio.h>
#include <stdarg.h>
#endif
#ifdef CMS_DEBUG
void debug_log(const char *fmt, ...)
{
FILE *f_log;
va_list ap;
f_log = fopen("cmslog.log", "a");
va_start(ap, fmt);
vfprintf(f_log, fmt, ap);
va_end(ap);
fclose(f_log);
}
#endif
mid_channel cms_synth[MAX_CMS_CHANNELS]; // CMS synth
static unsigned short freqtable[128] = {
8, 9, 9, 10, 10, 11, 12, 12, 13, 14, 15, 15,
16, 17, 18, 19, 21, 22, 23, 24, 26, 28, 29, 31,
33, 35, 37, 39, 41, 44, 46, 49, 52, 55, 58, 62,
65, 69, 73, 78, 82, 87, 92, 98, 104, 110, 117, 123,
131, 139, 147, 156, 165, 175, 185, 196, 208, 220, 233, 247,
262, 277, 294, 311, 330, 349, 370, 392, 415, 440, 466, 494,
523, 554, 587, 622, 659, 698, 740, 784, 831, 880, 932, 988,
1047, 1109, 1175, 1245, 1319, 1397, 1480, 1568, 1661, 1760, 1865, 1976,
2093, 2217, 2349, 2489, 2637, 2794, 2960, 3136, 3322, 3520, 3729, 3951,
4186, 4435, 4699, 4978, 5274, 5588, 5920, 6272, 6645, 7040, 7459, 7902,
8372, 8870, 9397, 9956,10548,11175,11840,12544};
static unsigned short pitchtable[256] = { /* pitch wheel */
29193U,29219U,29246U,29272U,29299U,29325U,29351U,29378U, /* -128 */
29405U,29431U,29458U,29484U,29511U,29538U,29564U,29591U, /* -120 */
29618U,29644U,29671U,29698U,29725U,29752U,29778U,29805U, /* -112 */
29832U,29859U,29886U,29913U,29940U,29967U,29994U,30021U, /* -104 */
30048U,30076U,30103U,30130U,30157U,30184U,30212U,30239U, /* -96 */
30266U,30293U,30321U,30348U,30376U,30403U,30430U,30458U, /* -88 */
30485U,30513U,30541U,30568U,30596U,30623U,30651U,30679U, /* -80 */
30706U,30734U,30762U,30790U,30817U,30845U,30873U,30901U, /* -72 */
30929U,30957U,30985U,31013U,31041U,31069U,31097U,31125U, /* -64 */
31153U,31181U,31209U,31237U,31266U,31294U,31322U,31350U, /* -56 */
31379U,31407U,31435U,31464U,31492U,31521U,31549U,31578U, /* -48 */
31606U,31635U,31663U,31692U,31720U,31749U,31778U,31806U, /* -40 */
31835U,31864U,31893U,31921U,31950U,31979U,32008U,32037U, /* -32 */
32066U,32095U,32124U,32153U,32182U,32211U,32240U,32269U, /* -24 */
32298U,32327U,32357U,32386U,32415U,32444U,32474U,32503U, /* -16 */
32532U,32562U,32591U,32620U,32650U,32679U,32709U,32738U, /* -8 */
32768U,32798U,32827U,32857U,32887U,32916U,32946U,32976U, /* 0 */
33005U,33035U,33065U,33095U,33125U,33155U,33185U,33215U, /* 8 */
33245U,33275U,33305U,33335U,33365U,33395U,33425U,33455U, /* 16 */
33486U,33516U,33546U,33576U,33607U,33637U,33667U,33698U, /* 24 */
33728U,33759U,33789U,33820U,33850U,33881U,33911U,33942U, /* 32 */
33973U,34003U,34034U,34065U,34095U,34126U,34157U,34188U, /* 40 */
34219U,34250U,34281U,34312U,34343U,34374U,34405U,34436U, /* 48 */
34467U,34498U,34529U,34560U,34591U,34623U,34654U,34685U, /* 56 */
34716U,34748U,34779U,34811U,34842U,34874U,34905U,34937U, /* 64 */
34968U,35000U,35031U,35063U,35095U,35126U,35158U,35190U, /* 72 */
35221U,35253U,35285U,35317U,35349U,35381U,35413U,35445U, /* 80 */
35477U,35509U,35541U,35573U,35605U,35637U,35669U,35702U, /* 88 */
35734U,35766U,35798U,35831U,35863U,35895U,35928U,35960U, /* 96 */
35993U,36025U,36058U,36090U,36123U,36155U,36188U,36221U, /* 104 */
36254U,36286U,36319U,36352U,36385U,36417U,36450U,36483U, /* 112 */
36516U,36549U,36582U,36615U,36648U,36681U,36715U,36748U}; /* 120 */
unsigned char CMSFreqMap[128] = {
0 , 3, 7, 11, 15, 19, 23, 27,
31 , 34, 38, 41, 45, 48, 51, 55,
58 , 61, 64, 66, 69, 72, 75, 77,
80 , 83, 86, 88, 91, 94, 96, 99,
102,104,107,109,112,114,116,119,
121,123,125,128,130,132,134,136,
138,141,143,145,147,149,151,153,
155,157,159,161,162,164,166,168,
170,172,174,175,177,179,181,182,
184,186,188,189,191,193,194,196,
197,199,200,202,203,205,206,208,
209,210,212,213,214,216,217,218,
219,221,222,223,225,226,227,228,
229,231,232,233,234,235,236,237,
239,240,241,242,243,244,245,246,
247,249,250,251,252,253,254,255
};
// CMS IO port address
unsigned short cmsPort;
#if 0
// The 12 note-within-an-octave values for the SAA1099, starting at B
static unsigned char noteAdr[] = {5, 32, 60, 85, 110, 132, 153, 173, 192, 210, 227, 243};
#endif
// Volume
static unsigned char atten[128] = {
0,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,
3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,
5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,
7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,
9,9,9,9,9,9,9,9,10,10,10,10,10,10,10,10,
11,11,11,11,11,11,11,11,12,12,12,12,12,12,12,12,
13,13,13,13,13,13,13,13,14,14,14,14,14,14,14,14,
15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
};
// Logic channel - first chip/second chip
static unsigned char ChanReg[12] = {000,001,002,003,004,005,000,001,002,003,004,005};
// Set octave command
static unsigned char OctavReg[12] = {0x10,0x10,0x11,0x11,0x12,0x12,0x10,0x10,0x11,0x11,0x12,0x12};
unsigned char CmsOctaveStore[12];
unsigned char ChanEnableReg[2] = {0,0};
// Note priority
unsigned char NotePriority;
unsigned short channelpitch[16];
void __declspec( naked ) cmsWrite(void)
{
/*
parameters
dx = port base+offset
ah = register
al = data
*/
_asm
{
inc dx
xchg al,ah
out dx,al
dec dx
xchg al,ah
out dx,al
ret
}
}
void __declspec( naked ) cmsNull(unsigned short port)
{
/*
parameters
dx = port offset to null
*/
_asm
{
add dx,cmsPort // FIXME! CMSPortAddr
mov cx,20h
xor ax,ax
loop_nul: // null all 20 registers
call cmsWrite
inc ah
loop loop_nul
mov ax,1C02h // reset chip
call cmsWrite
mov ax,1C01h // enable this chip
call cmsWrite
ret
}
}
void cmsReset(unsigned short port)
{
unsigned char i;
cmsPort = port;
_asm
{
mov dx,0
call cmsNull
mov dx,2
call cmsNull
}
for (i=0;i<11;i++)CmsOctaveStore[i]=0;
ChanEnableReg[0]=0;
ChanEnableReg[1]=0;
for (i=0;i<MAX_CMS_CHANNELS;i++)
{
cms_synth[i].note=0;
cms_synth[i].priority=0;
cms_synth[i].ch = 0;
cms_synth[i].voice = 0;
cms_synth[i].velocity = 0;
}
for (i=0;i<16;i++)
{
channelpitch[i] = 8192;
}
NotePriority = 0;
}
static void CMS_SetRegister(unsigned short regAddr, unsigned char reg, unsigned char val)
{
outp(regAddr + 1, reg); /* Select the register */
outp(regAddr, val); /* Set the value of the register */
}
#if 0
void cmsDisableVoice(unsigned char voice)
{
if (voice > 5)
{
ChanEnableReg[1] &= ~(1 << ChanReg[voice]);
CMS_SetRegister(cmsPort + 2, 0x14, ChanEnableReg[1]);
}
else
{
ChanEnableReg[0] &= ~(1 << ChanReg[voice]);
CMS_SetRegister(cmsPort, 0x14, ChanEnableReg[0]);
}
}
void cmsSound(unsigned char voice,unsigned char freq,unsigned char octave,unsigned char amplitudeLeft,unsigned char amplitudeRight)
{
if (voice > 5)
{
if (ChanReg[voice]&0x1 == 0)
CmsOctaveStore[OctavReg[voice]-0x10+3] = (CmsOctaveStore[OctavReg[voice]-0x10+3] & 0xF0) | octave;
else
CmsOctaveStore[OctavReg[voice]-0x10+3] = ((CmsOctaveStore[OctavReg[voice]-0x10+3] & 0xF) << 4) | octave;
CMS_SetRegister(cmsPort + 2, OctavReg[voice], CmsOctaveStore[OctavReg[voice]-0x10+3]);
CMS_SetRegister(cmsPort + 2, ChanReg[voice], (amplitudeLeft << 4) | amplitudeRight);
CMS_SetRegister(cmsPort + 2, ChanReg[voice] | 0x8, freq);
ChanEnableReg[1] |= 1 << ChanReg[voice];
CMS_SetRegister(cmsPort + 2, 0x14, ChanEnableReg[1]);
}
else
{
if (ChanReg[voice]&0x1 == 0)
CmsOctaveStore[OctavReg[voice]-0x10] = (CmsOctaveStore[OctavReg[voice]-0x10] & 0xF0) | octave;
else
CmsOctaveStore[OctavReg[voice]-0x10] = ((CmsOctaveStore[OctavReg[voice]-0x10] & 0xF) << 4) | octave;
CMS_SetRegister(cmsPort, OctavReg[voice], CmsOctaveStore[OctavReg[voice]-0x10]);
CMS_SetRegister(cmsPort, ChanReg[voice], (amplitudeLeft << 4) | amplitudeRight);
CMS_SetRegister(cmsPort, ChanReg[voice] | 0x8, freq);
ChanEnableReg[0] |= 1 << ChanReg[voice];
CMS_SetRegister(cmsPort, 0x14, ChanEnableReg[0]);
}
}
#endif
void cmsDisableVoice(unsigned char voice)
{
_asm
{
xor bh,bh
mov bl,voice
mov dx,cmsPort // FIXME !!!
mov bl,ChanReg[bx] ; bl = true channel (0 - 5)
xor di,di
mov cl,voice
cmp cl,06h
jl skip_inc
inc di
add dx,2
skip_inc:
mov al,14h
inc dx
out dx,al
dec dx
mov al,ChanEnableReg[di]
mov ah,01h
mov cl,bl
shl ah,cl
not ah
and al,ah ; al = voice enable reg
out dx,al
mov ChanEnableReg[di],al
}
}
void cmsSetVolume(unsigned char voice,unsigned char amplitudeLeft,unsigned char amplitudeRight)
{
_asm
{
xor bh,bh
mov bl,voice
mov dx,cmsPort // FIXME !!!
cmp bl,06h ; check channel num > 5?
jl setVol ; yes - set port = port + 2
add dx,2
setVol:
mov bl,ChanReg[bx] ; bx = true channel (0 - 5)
mov al,byte ptr amplitudeLeft
mov ah,byte ptr amplitudeRight
mov cl,4
shl ah,cl
or al,ah
mov ah,bl
call cmsWrite
}
}
void cmsSound(unsigned char voice,unsigned char freq,unsigned char octave,unsigned char amplitudeLeft,unsigned char amplitudeRight)
{
_asm
{
xor bh,bh
mov bl,voice
mov dx,cmsPort // FIXME !!!
cmp bl,06h ; check channel num > 5?
jl setOctave ; yes - set port = port + 2
add dx,2
setOctave:
mov bl,ChanReg[bx] ; bx = true channel (0 - 5) //FIXME swap down
mov ah,OctavReg[bx] ; ah = Set octave command //FIXME swap up
;
; ah now = register
; 0,1,6,7=$10
; 2,3,8,9=$11
; 4,5,10,11=$12
;
; CMS octave regs are write only, so we have to track
; the values in adjoining voices manually
mov al,ah
xor ah,ah ; ax = set octave cmd (10h - 12h)
mov di,ax ; di = ax
sub di,010h ; di = octave cmd - 10h (0..2 index)
mov cl,voice
cmp cl,06h
jl skip_inc
add di,3
skip_inc:
mov ah,al ; set ah back to octave cmd
mov al,byte ptr CmsOctaveStore[di]
mov bh,octave
test bl,01h
jnz shiftOctave
and al,0F0h
jmp outOctave
shiftOctave:
and al,0Fh
mov cl,4
shl bh,cl
outOctave:
or al,bh
mov byte ptr CmsOctaveStore[di],al
call cmsWrite ; set octave to CMS
setAmp:
mov al,byte ptr amplitudeLeft
mov ah,byte ptr amplitudeRight
;and al,0Fh
mov cl,4
shl ah,cl
or al,ah
mov ah,bl
call cmsWrite
setFreq:
mov al,byte ptr freq
or ah,08h
call cmsWrite
voiceEnable:
mov al,14h
inc dx
out dx,al
dec dx
xor di,di
mov cl,voice
cmp cl,06h
jl skip_inc2
inc di
skip_inc2:
mov al,ChanEnableReg[di]
mov ah,01h
mov cl,bl
shl ah,cl
or al,ah
out dx,al
mov ChanEnableReg[di],al
}
}
// ****
// High-level CMS synth procedures
// ****
void cms_pitchwheel(unsigned short oplport, int channel, int pitchwheel)
{
unsigned char i;
unsigned short notefreq;
unsigned char note;
int pitch;
unsigned char octave;
channelpitch[channel] = pitchwheel;
for(i=0; i<MAX_CMS_CHANNELS; i++)
{
if ((cms_synth[i].ch==channel) && (cms_synth[i].note != 0))
{
note = cms_synth[i].note;
pitch = pitchwheel;
if (pitch != 0) {
if (pitch > 127) {
pitch = 127;
} else if (pitch < -128) {
pitch = -128;
}
}
notefreq = ((unsigned long)freqtable[note] * pitchtable[pitch + 128]) >> 15;
if ((notefreq > 31) && (notefreq < 7824))
{
octave=4;
while (notefreq<489)
{
notefreq=notefreq*2;
octave--;
}
while (notefreq>977)
{
notefreq=notefreq / 2;
octave++;
}
#ifndef DRUMS_ONLY
cmsSound(cms_synth[i].voice,CMSFreqMap[((notefreq-489)*128) / 489],octave,atten[cms_synth[i].velocity],atten[cms_synth[i].velocity]);
#endif
}
}
}
}
void cmsNoteOff(unsigned char channel, unsigned char note)
{
unsigned char i;
unsigned char voice;
if (channel == 9)
{
#ifdef CMS_DEBUG
debug_log("DRUM OFF note= %u\n",note);
#endif
CMS_SetRegister(cmsPort+2, 0x19, 0x0);
CMS_SetRegister(cmsPort+2, 0x15, 0x0); // noise ch 11
cmsDisableVoice(11);
}
else
{
voice = MAX_CMS_CHANNELS;
for(i=0; i<MAX_CMS_CHANNELS; i++)
{
if(cms_synth[i].note==note)
{
voice = i;
break;
}
}
// Note not found, ignore note off command
if(voice==MAX_CMS_CHANNELS)
{
#ifdef CMS_DEBUG
debug_log("not found Ch=%u,note=%u\n",channel & 0xFF,note & 0xFF);
#endif
return;
}
// decrease priority for all notes greater than current
for (i=0; i<MAX_CMS_CHANNELS; i++)
if (cms_synth[i].priority > cms_synth[voice].priority )
cms_synth[i].priority = cms_synth[i].priority - 1;
if (NotePriority != 0) NotePriority--;
cmsDisableVoice(voice);
cms_synth[voice].note = 0;
cms_synth[voice].priority = 0;
cms_synth[voice].ch = 0;
cms_synth[voice].voice = 0;
cms_synth[voice].velocity = 0;
}
}
void cmsNoteOn(unsigned char channel, unsigned char note, unsigned char velocity)
{
unsigned char i;
unsigned char voice;
unsigned notefreq;
int pitch;
if (channel == 9)
{
if (velocity != 0)
{
#ifdef CMS_DEBUG
debug_log("DRUM ON note= %u\n",note);
#endif
CMS_SetRegister(cmsPort+2, 0x19, 0x84); // single dacay
switch (note) {
case 37: // Side Stick
CMS_SetRegister(cmsPort+2, 0x16, 0x00); // noise gen 1 31.3kHz
CMS_SetRegister(cmsPort+2, 0x15, 0x20); // noise ch 11
cmsSound(11,0,2,atten[velocity],atten[velocity]);
break;
case 38: // Acoustic Snare
CMS_SetRegister(cmsPort+2, 0x16, 0x00); // noise gen 1 31.3kHz
CMS_SetRegister(cmsPort+2, 0x15, 0x20); // noise ch 11
cmsSound(11,0,0,atten[velocity],atten[velocity]);
break;
case 39: // Hand Clap
CMS_SetRegister(cmsPort+2, 0x16, 0x10); // noise gen 1 15.6kHz
CMS_SetRegister(cmsPort+2, 0x15, 0x20); // noise ch 11
cmsSound(11,0,3,atten[velocity],atten[velocity]);
break;
case 40: // Electric Snare
CMS_SetRegister(cmsPort+2, 0x16, 0x10); // noise gen 1 15.6kHz
CMS_SetRegister(cmsPort+2, 0x15, 0x20); // noise ch 11
cmsSound(11,0,1,atten[velocity],atten[velocity]);
break;
case 42: // Closed Hi Hat
CMS_SetRegister(cmsPort+2, 0x16, 0x10); // noise gen 1 15.6kHz
CMS_SetRegister(cmsPort+2, 0x15, 0x20); // noise ch 11
cmsSound(11,0,2,atten[velocity],atten[velocity]);
break;
case 44: // Pedal Hi-Hat
CMS_SetRegister(cmsPort+2, 0x16, 0x10); // noise gen 1 15.6kHz
CMS_SetRegister(cmsPort+2, 0x15, 0x20); // noise ch 11
cmsSound(11,0,0,atten[velocity],atten[velocity]);
break;
case 52: // Chinese Cymbal
CMS_SetRegister(cmsPort+2, 0x16, 0x20); // noise gen 1 7.6kHz
CMS_SetRegister(cmsPort+2, 0x15, 0x20); // noise ch 11
cmsSound(11,0,2,atten[velocity],atten[velocity]);
break;
case 55: // Splash Cymbal
CMS_SetRegister(cmsPort+2, 0x16, 0x20); // noise gen 1 7.6kHz
CMS_SetRegister(cmsPort+2, 0x15, 0x20); // noise ch 11
cmsSound(11,0,0,atten[velocity],atten[velocity]);
break;
case 71: // Short Whistle
case 72: // Long Whistle
cmsSound(11,0,6,atten[velocity],atten[velocity]);
break;
default:
cmsSound(11,0,1,atten[velocity],atten[velocity]);
}
}
else
{
CMS_SetRegister(cmsPort+2, 0x19, 0x0);
CMS_SetRegister(cmsPort+2, 0x15, 0x0); // noise ch 11
cmsDisableVoice(11);
}
}
else
if (velocity != 0)
{
/*
unsigned char note_cms = note+1;
unsigned char octave = (note_cms / 12) - 1; //Some fancy math to get the correct octave
unsigned char noteVal = note_cms - ((octave + 1) * 12); //More fancy math to get the correct note
*/
NotePriority++;
voice = MAX_CMS_CHANNELS;
for(i=0; i<MAX_CMS_CHANNELS; i++)
{
if(cms_synth[i].note==0)
{
voice = i;
break;
}
}
// We run out of voices, find low priority voice
if(voice==MAX_CMS_CHANNELS)
{
unsigned char min_prior = cms_synth[0].priority;
#ifdef CMS_DEBUG
debug_log("out of voice. NotePriority=%u\n",NotePriority);
for (i=0; i<MAX_CMS_CHANNELS; i++)
debug_log("%u ",cms_synth[i].priority);
debug_log("\n");
#endif
// find note with min prioryty
voice = 0;
for (i=1; i<MAX_CMS_CHANNELS; i++)
if (cms_synth[i].priority < min_prior)
{
voice = i;
min_prior = cms_synth[i].priority;
}
// decrease all notes priority by one
for (i=0; i<MAX_CMS_CHANNELS; i++)
if (cms_synth[i].priority != 0)
cms_synth[i].priority = cms_synth[i].priority - 1;
// decrease current priority
if (NotePriority != 0) NotePriority--;
#ifdef CMS_DEBUG
debug_log("find low priority voice %u, NotePriority=%u\n",voice,NotePriority);
for (i=0; i<MAX_CMS_CHANNELS; i++)
debug_log("%u ",cms_synth[i].priority);
debug_log("\n");
#endif
}
pitch = channelpitch[channel];
if (pitch != 0) {
if (pitch > 127) {
pitch = 127;
} else if (pitch < -128) {
pitch = -128;
}
}
notefreq = ((unsigned long)freqtable[note] * pitchtable[pitch + 128]) >> 15;
if ((notefreq > 31) && (notefreq < 7824))
{
unsigned char octave = 4;
while (notefreq<489)
{
notefreq=notefreq*2;
octave--;
}
while (notefreq>977)
{
notefreq=notefreq / 2;
octave++;
}
#ifndef DRUMS_ONLY
cmsSound(voice,CMSFreqMap[((notefreq-489)*128) / 489],octave,atten[velocity],atten[velocity]);
#endif
cms_synth[voice].note = note;
cms_synth[voice].priority = NotePriority;
cms_synth[voice].velocity = velocity;
cms_synth[voice].ch = channel;
cms_synth[voice].voice = voice;
}
}
else
cmsNoteOff(channel,note);
}
void cmsTick(void)
{
#if 0
unsigned char i;
unsigned char noteVal;
for (i=0;i<MAX_CMS_CHANNELS;i++)
if (cms_synth[i].note != 0)
{
noteVal = cms_synth[i].volume-1;
if (noteVal != 0)
{
cmsSetVolume(i,atten[noteVal],atten[noteVal]);
cms_synth[i].volume = noteVal;
}
else
{
cmsDisableVoice(i);
cms_synth[i].volume = 0;
cms_synth[i].note = 0;
}
}
#endif
}
void cmsController(unsigned char channel, unsigned char id, unsigned char val)
{
unsigned char i;
if ((id==121) || (id==123)) // All Sound/Notes Off
{
for (i=0;i<MAX_CMS_CHANNELS;i++)
if (cms_synth[i].note != 0)
{
cmsDisableVoice(i);
cms_synth[i].note = 0;
cms_synth[i].priority = 0;
cms_synth[i].ch = 0;
cms_synth[i].voice = 0;
cms_synth[i].velocity = 0;
}
if (id==121)
{
for (i=0;i<16;i++)
channelpitch[i] = 8192;
}
}
}
#endif