First CVS upload.
Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@80
This commit is contained in:
Sjoerd van der Berg
parent
7d1ca9bdd4
commit
42e5d0b779
158 changed files with 42940 additions and 0 deletions
256
src/hardware/gameblaster.cpp
Normal file
256
src/hardware/gameblaster.cpp
Normal file
|
|
@ -0,0 +1,256 @@
|
|||
/*
|
||||
* Copyright (C) 2002 The DOSBox Team
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU Library General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
||||
*/
|
||||
|
||||
#include <math.h>
|
||||
#include "dosbox.h"
|
||||
#include "inout.h"
|
||||
#include "mixer.h"
|
||||
#include "mem.h"
|
||||
#include "hardware.h"
|
||||
|
||||
#define CMS_RATE 22050
|
||||
#define CMS_VOLUME 6000
|
||||
|
||||
|
||||
#define FREQ_SHIFT 16
|
||||
|
||||
#define SIN_ENT 1024
|
||||
#define SIN_MAX (SIN_ENT << FREQ_SHIFT)
|
||||
|
||||
#ifndef PI
|
||||
#define PI 3.14159265358979323846
|
||||
#endif
|
||||
|
||||
|
||||
|
||||
struct CMS {
|
||||
struct {
|
||||
Bit32u freq_pos;
|
||||
Bit32u freq_add;
|
||||
Bit16s * vol_left;
|
||||
Bit16s * vol_right;
|
||||
Bit8u octave;
|
||||
Bit8u freq;
|
||||
} chan[6];
|
||||
struct {
|
||||
Bit32u freq_pos;
|
||||
Bit32u freq_add;
|
||||
Bit32u random_val;
|
||||
} noise[2];
|
||||
|
||||
Bit8u voice_enabled;
|
||||
Bit8u noise_enabled;
|
||||
Bit8u reg;
|
||||
};
|
||||
|
||||
static Bit32u freq_table[256][8];
|
||||
static Bit32u noise_freq[3];
|
||||
static Bit16s vol_table[16];
|
||||
static Bit16s sin_table[16][SIN_ENT];
|
||||
|
||||
static MIXER_Channel * cms_chan;
|
||||
static CMS cms_block[2];
|
||||
|
||||
static void write_cms(Bit32u port,Bit8u val) {
|
||||
Bit32u sel=(port>>1)&1;
|
||||
CMS * cms=&cms_block[sel];
|
||||
switch (port & 1) {
|
||||
case 1: /* Register Select */
|
||||
cms->reg=val;
|
||||
break;
|
||||
case 0: /* Write Register */
|
||||
switch (cms->reg) {
|
||||
case 0x00: case 0x01: case 0x02: /* Volume Select */
|
||||
case 0x03: case 0x04: case 0x05:
|
||||
cms->chan[cms->reg].vol_left=sin_table[val & 0xf];
|
||||
cms->chan[cms->reg].vol_right=sin_table[(val>>4) & 0xf];
|
||||
break;
|
||||
case 0x08: case 0x09: case 0x0a: /* Frequency Select */
|
||||
case 0x0b: case 0x0c: case 0x0d:
|
||||
{
|
||||
Bit8u chan=cms->reg-0x08;
|
||||
cms->chan[chan].freq=val;
|
||||
/* Get a new entry in the freq table */
|
||||
cms->chan[chan].freq_add=freq_table[cms->chan[chan].freq][cms->chan[chan].octave];
|
||||
break;
|
||||
}
|
||||
case 0x10: case 0x11: case 0x12: /* Octave Select */
|
||||
{
|
||||
Bit8u chan=(cms->reg-0x10)*2;
|
||||
cms->chan[chan].octave=val&7;
|
||||
cms->chan[chan].freq_add=freq_table[cms->chan[chan].freq][cms->chan[chan].octave];
|
||||
chan++;
|
||||
cms->chan[chan].octave=(val>>4)&7;
|
||||
cms->chan[chan].freq_add=freq_table[cms->chan[chan].freq][cms->chan[chan].octave];
|
||||
}
|
||||
break;
|
||||
case 0x14: /* Frequency enable */
|
||||
cms->voice_enabled=val;
|
||||
//TODO Check for enabling of speaker maybe
|
||||
break;
|
||||
case 0x15: /* Noise Enable */
|
||||
cms->noise_enabled=val;
|
||||
//TODO Check for enabling of speaker maybe
|
||||
break;
|
||||
case 0x16: /* Noise generator setup */
|
||||
cms->noise[0].freq_add=noise_freq[val & 3];
|
||||
cms->noise[1].freq_add=noise_freq[(val>>4) & 3];
|
||||
break;
|
||||
default:
|
||||
LOG_ERROR("CMS %d:Illegal register %X2 Selected for write",sel,cms->reg);
|
||||
break;
|
||||
};
|
||||
break;
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
static void CMS_CallBack(Bit8u * stream,Bit32u len) {
|
||||
/* Generate the CMS wave */
|
||||
/* Generate 12 channels of sound data this could be nice */
|
||||
for (Bit32u l=0;l<len;l++) {
|
||||
register Bit32s left,right;
|
||||
left=right=0;
|
||||
for (int c=0;c<2;c++) {
|
||||
CMS * cms=&cms_block[c];
|
||||
Bit8u use_voice=1;
|
||||
for (int chan=0;chan<6;chan++) {
|
||||
if (cms->noise_enabled & use_voice) {
|
||||
|
||||
} else if (cms->voice_enabled & use_voice) {
|
||||
int pos=cms->chan[chan].freq_pos>>FREQ_SHIFT;
|
||||
left+=cms->chan[chan].vol_left[pos];
|
||||
right+=cms->chan[chan].vol_right[pos];
|
||||
cms->chan[chan].freq_pos+=cms->chan[chan].freq_add;
|
||||
if (cms->chan[chan].freq_pos>=SIN_MAX)
|
||||
cms->chan[chan].freq_pos-=SIN_MAX;
|
||||
}
|
||||
use_voice<<=1;
|
||||
}
|
||||
}
|
||||
if (left>MAX_AUDIO) *(Bit16s *)stream=MAX_AUDIO;
|
||||
else if (left<MIN_AUDIO) *(Bit16s *)stream=MIN_AUDIO;
|
||||
else *(Bit16s *)stream=(Bit16s)left;
|
||||
stream+=2;
|
||||
|
||||
if (right>MAX_AUDIO) *(Bit16s *)stream=MAX_AUDIO;
|
||||
else if (right<MIN_AUDIO) *(Bit16s *)stream=MIN_AUDIO;
|
||||
else *(Bit16s *)stream=(Bit16s)right;
|
||||
stream+=2;
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
static HWBlock hw_cms;
|
||||
static bool cms_enabled;
|
||||
|
||||
static void CMS_Enable(bool enable) {
|
||||
if (enable) {
|
||||
cms_enabled=true;
|
||||
MIXER_Enable(cms_chan,true);
|
||||
IO_RegisterWriteHandler(0x220,write_cms,"CMS");
|
||||
IO_RegisterWriteHandler(0x221,write_cms,"CMS");
|
||||
IO_RegisterWriteHandler(0x222,write_cms,"CMS");
|
||||
IO_RegisterWriteHandler(0x223,write_cms,"CMS");
|
||||
} else {
|
||||
cms_enabled=false;
|
||||
MIXER_Enable(cms_chan,false);
|
||||
IO_FreeWriteHandler(0x220);
|
||||
IO_FreeWriteHandler(0x221);
|
||||
IO_FreeWriteHandler(0x222);
|
||||
IO_FreeWriteHandler(0x223);
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void CMS_InputHandler(char * line) {
|
||||
bool s_off=ScanCMDBool(line,"OFF");
|
||||
bool s_on=ScanCMDBool(line,"ON");
|
||||
char * rem=ScanCMDRemain(line);
|
||||
if (rem) {
|
||||
sprintf(line,"Illegal Switch");
|
||||
return;
|
||||
}
|
||||
if (s_on && s_off) {
|
||||
sprintf(line,"Can't use /ON and /OFF at the same time");
|
||||
return;
|
||||
}
|
||||
if (s_on) {
|
||||
CMS_Enable(true);
|
||||
sprintf(line,"Creative Music System has been enabled");
|
||||
return;
|
||||
}
|
||||
if (s_off) {
|
||||
CMS_Enable(false);
|
||||
sprintf(line,"Creative Music System has been disabled");
|
||||
return;
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
static void CMS_OutputHandler (char * towrite) {
|
||||
if(cms_enabled) {
|
||||
sprintf(towrite,"IO %X",0x220);
|
||||
} else {
|
||||
sprintf(towrite,"Disabled");
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
void CMS_Init(void) {
|
||||
Bits i;
|
||||
/* Register the Mixer CallBack */
|
||||
cms_chan=MIXER_AddChannel(CMS_CallBack,CMS_RATE,"CMS");
|
||||
MIXER_SetMode(cms_chan,MIXER_16STEREO);
|
||||
MIXER_Enable(cms_chan,false);
|
||||
/* Register with the hardware setup tool */
|
||||
hw_cms.dev_name="CMS";
|
||||
hw_cms.full_name="Creative Music System";
|
||||
hw_cms.next=0;
|
||||
hw_cms.help="/ON Enables CMS\n/OFF Disables CMS\n";
|
||||
hw_cms.get_input=CMS_InputHandler;
|
||||
hw_cms.show_status=CMS_OutputHandler;
|
||||
HW_Register(&hw_cms);
|
||||
CMS_Enable(false);
|
||||
/* Make the frequency/octave table */
|
||||
double log_start=log10(27.34375);
|
||||
double log_add=(log10(54.609375)-log10(27.34375))/256;
|
||||
for (i=0;i<256;i++) {
|
||||
double freq=pow(10,log_start);
|
||||
for (int k=0;k<8;k++) {
|
||||
freq_table[i][k]=(Bit32u)((double)SIN_MAX/(CMS_RATE/freq));
|
||||
freq*=2;
|
||||
}
|
||||
log_start+=log_add;
|
||||
}
|
||||
// noise_freq[0]=(Bit32u)(FREQ_MAX/((float)CMS_RATE/(float)28000));
|
||||
// noise_freq[1]=(Bit32u)(FREQ_MAX/((float)CMS_RATE/(float)14000));
|
||||
// noise_freq[2]=(Bit32u)(FREQ_MAX/((float)CMS_RATE/(float)6800));
|
||||
for (int s=0;s<SIN_ENT;s++) {
|
||||
double out=sin( (2*PI/SIN_ENT)*s)*CMS_VOLUME;
|
||||
for (i=15;i>=0;i--) {
|
||||
sin_table[i][s]=(Bit16s)out;
|
||||
// out /= (float)1.258925412; /* = 10 ^ (2/20) = 2dB */
|
||||
out /= 1.1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue