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cog/Frameworks/GME/gme/k053260.c

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/*********************************************************
Konami 053260 PCM Sound Chip
*********************************************************/
#include "mamedef.h"
//#include "emu.h"
#ifdef _DEBUG
#include <stdio.h>
#endif
#include <stdlib.h>
#include <memory.h>
#include "k053260.h"
#define NULL ((void *)0)
/* 2004-02-28: Fixed PPCM decoding. Games sound much better now.*/
#define LOG 0
#define BASE_SHIFT 16
typedef struct _k053260_channel k053260_channel;
struct _k053260_channel
{
UINT32 rate;
UINT32 size;
UINT32 start;
UINT32 bank;
UINT32 volume;
int play;
UINT32 pan;
UINT32 pos;
int loop;
int ppcm; /* packed PCM ( 4 bit signed ) */
int ppcm_data;
UINT8 Muted;
};
typedef struct _k053260_state k053260_state;
struct _k053260_state
{
//sound_stream * channel;
int mode;
int regs[0x30];
UINT8 *rom;
//int rom_size;
UINT32 rom_size;
UINT32 *delta_table;
k053260_channel channels[4];
//const k053260_interface *intf;
//device_t *device;
};
/*INLINE k053260_state *get_safe_token(device_t *device)
{
assert(device != NULL);
assert(device->type() == K053260);
return (k053260_state *)downcast<legacy_device_base *>(device)->token();
}*/
static void InitDeltaTable( k053260_state *ic, int rate, int clock )
{
int i;
double base = ( double )rate;
double max = (double)(clock); /* Hz */
UINT32 val;
for( i = 0; i < 0x1000; i++ ) {
double v = ( double )( 0x1000 - i );
double target = (max) / v;
double fixed = ( double )( 1 << BASE_SHIFT );
if ( target && base ) {
target = fixed / ( base / target );
val = ( UINT32 )target;
if ( val == 0 )
val = 1;
} else
val = 1;
ic->delta_table[i] = val;
}
}
//static DEVICE_RESET( k053260 )
void device_reset_k053260(void *chip)
{
//k053260_state *ic = get_safe_token(device);
k053260_state *ic = (k053260_state *) chip;
int i;
for( i = 0; i < 4; i++ ) {
ic->channels[i].rate = 0;
ic->channels[i].size = 0;
ic->channels[i].start = 0;
ic->channels[i].bank = 0;
ic->channels[i].volume = 0;
ic->channels[i].play = 0;
ic->channels[i].pan = 0;
ic->channels[i].pos = 0;
ic->channels[i].loop = 0;
ic->channels[i].ppcm = 0;
ic->channels[i].ppcm_data = 0;
}
}
INLINE int limit( int val, int max, int min )
{
if ( val > max )
val = max;
else if ( val < min )
val = min;
return val;
}
//#define MAXOUT 0x7fff
#define MAXOUT +0x8000
#define MINOUT -0x8000
//static STREAM_UPDATE( k053260_update )
void k053260_update(void *chip, stream_sample_t **outputs, int samples)
{
static const long dpcmcnv[] = { 0,1,2,4,8,16,32,64, -128, -64, -32, -16, -8, -4, -2, -1};
int i, j, lvol[4], rvol[4], play[4], loop[4], ppcm_data[4], ppcm[4];
unsigned char *rom[4];
UINT32 delta[4], end[4], pos[4];
int dataL, dataR;
signed char d;
k053260_state *ic = (k053260_state *) chip;
/* precache some values */
for ( i = 0; i < 4; i++ ) {
rom[i]= &ic->rom[ic->channels[i].start + ( ic->channels[i].bank << 16 )];
delta[i] = ic->delta_table[ic->channels[i].rate];
lvol[i] = ic->channels[i].volume * ic->channels[i].pan;
rvol[i] = ic->channels[i].volume * ( 8 - ic->channels[i].pan );
end[i] = ic->channels[i].size;
pos[i] = ic->channels[i].pos;
play[i] = ic->channels[i].play;
loop[i] = ic->channels[i].loop;
ppcm[i] = ic->channels[i].ppcm;
ppcm_data[i] = ic->channels[i].ppcm_data;
if ( ppcm[i] )
delta[i] /= 2;
}
for ( j = 0; j < samples; j++ ) {
dataL = dataR = 0;
for ( i = 0; i < 4; i++ ) {
/* see if the voice is on */
if ( play[i] ) {
/* see if we're done */
if ( ( pos[i] >> BASE_SHIFT ) >= end[i] ) {
ppcm_data[i] = 0;
if ( loop[i] )
pos[i] = 0;
else {
play[i] = 0;
continue;
}
}
if ( ppcm[i] ) { /* Packed PCM */
/* we only update the signal if we're starting or a real sound sample has gone by */
/* this is all due to the dynamic sample rate convertion */
if ( pos[i] == 0 || ( ( pos[i] ^ ( pos[i] - delta[i] ) ) & 0x8000 ) == 0x8000 )
{
int newdata;
if ( pos[i] & 0x8000 ){
newdata = ((rom[i][pos[i] >> BASE_SHIFT]) >> 4) & 0x0f; /*high nybble*/
}
else{
newdata = ( ( rom[i][pos[i] >> BASE_SHIFT] ) ) & 0x0f; /*low nybble*/
}
ppcm_data[i] = (( ( ppcm_data[i] * 62 ) >> 6 ) + dpcmcnv[newdata]);
if ( ppcm_data[i] > 127 )
ppcm_data[i] = 127;
else
if ( ppcm_data[i] < -128 )
ppcm_data[i] = -128;
}
d = ppcm_data[i];
pos[i] += delta[i];
} else { /* PCM */
d = rom[i][pos[i] >> BASE_SHIFT];
pos[i] += delta[i];
}
if ( ic->mode & 2 ) {
dataL += ( d * lvol[i] ) >> 2;
dataR += ( d * rvol[i] ) >> 2;
}
}
}
outputs[1][j] = limit( dataL, MAXOUT, MINOUT );
outputs[0][j] = limit( dataR, MAXOUT, MINOUT );
}
/* update the regs now */
for ( i = 0; i < 4; i++ ) {
ic->channels[i].pos = pos[i];
ic->channels[i].play = play[i];
ic->channels[i].ppcm_data = ppcm_data[i];
}
}
//static DEVICE_START( k053260 )
void * device_start_k053260(int clock)
{
//static const k053260_interface defintrf = { 0 };
//k053260_state *ic = get_safe_token(device);
k053260_state *ic;
//int rate = device->clock() / 32;
int rate = clock / 32;
int i;
ic = (k053260_state *) calloc(1, sizeof(k053260_state));
/* Initialize our chip structure */
//ic->device = device;
//ic->intf = (device->static_config() != NULL) ? (const k053260_interface *)device->static_config() : &defintrf;
ic->mode = 0;
//const memory_region *region = (ic->intf->rgnoverride != NULL) ? device->machine().region(ic->intf->rgnoverride) : device->region();
//ic->rom = *region;
//ic->rom_size = region->bytes();
ic->rom = NULL;
ic->rom_size = 0x00;
// has to be done by the player after calling device_start
//DEVICE_RESET_CALL(k053260);
for ( i = 0; i < 0x30; i++ )
ic->regs[i] = 0;
//ic->delta_table = auto_alloc_array( device->machine(), UINT32, 0x1000 );
ic->delta_table = (UINT32*)malloc(0x1000 * sizeof(UINT32));
//ic->channel = device->machine().sound().stream_alloc( *device, 0, 2, rate, ic, k053260_update );
//InitDeltaTable( ic, rate, device->clock() );
InitDeltaTable( ic, rate, clock );
/* register with the save state system */
/*device->save_item(NAME(ic->mode));
device->save_item(NAME(ic->regs));
for ( i = 0; i < 4; i++ )
{
device->save_item(NAME(ic->channels[i].rate), i);
device->save_item(NAME(ic->channels[i].size), i);
device->save_item(NAME(ic->channels[i].start), i);
device->save_item(NAME(ic->channels[i].bank), i);
device->save_item(NAME(ic->channels[i].volume), i);
device->save_item(NAME(ic->channels[i].play), i);
device->save_item(NAME(ic->channels[i].pan), i);
device->save_item(NAME(ic->channels[i].pos), i);
device->save_item(NAME(ic->channels[i].loop), i);
device->save_item(NAME(ic->channels[i].ppcm), i);
device->save_item(NAME(ic->channels[i].ppcm_data), i);
}*/
/* setup SH1 timer if necessary */
//if ( ic->intf->irq )
// device->machine().scheduler().timer_pulse( attotime::from_hz(device->clock()) * 32, ic->intf->irq, "ic->intf->irq" );
return ic; //return rate;
}
void device_stop_k053260(void *chip)
{
k053260_state *ic = (k053260_state *) chip;
free(ic->delta_table);
free(ic->rom); ic->rom = NULL;
free(ic);
}
INLINE void check_bounds( k053260_state *ic, int channel )
{
UINT32 channel_start = ( ic->channels[channel].bank << 16 ) + ic->channels[channel].start;
UINT32 channel_end = channel_start + ic->channels[channel].size - 1;
if ( channel_start > ic->rom_size ) {
logerror("K53260: Attempting to start playing past the end of the ROM ( start = %06x, end = %06x ).\n", channel_start, channel_end );
ic->channels[channel].play = 0;
return;
}
if ( channel_end > ic->rom_size ) {
logerror("K53260: Attempting to play past the end of the ROM ( start = %06x, end = %06x ).\n", channel_start, channel_end );
ic->channels[channel].size = ic->rom_size - channel_start;
}
if (LOG) logerror("K053260: Sample Start = %06x, Sample End = %06x, Sample rate = %04x, PPCM = %s\n", channel_start, channel_end, ic->channels[channel].rate, ic->channels[channel].ppcm ? "yes" : "no" );
}
//WRITE8_DEVICE_HANDLER( k053260_w )
void k053260_w(void *chip, offs_t offset, UINT8 data)
{
int i, t;
int r = offset;
int v = data;
k053260_state *ic = (k053260_state *) chip;
if ( r > 0x2f ) {
logerror("K053260: Writing past registers\n" );
return;
}
//ic->channel->update();
/* before we update the regs, we need to check for a latched reg */
if ( r == 0x28 ) {
t = ic->regs[r] ^ v;
for ( i = 0; i < 4; i++ ) {
if ( t & ( 1 << i ) ) {
if ( v & ( 1 << i ) ) {
ic->channels[i].play = 1;
ic->channels[i].pos = 0;
ic->channels[i].ppcm_data = 0;
check_bounds( ic, i );
} else
ic->channels[i].play = 0;
}
}
ic->regs[r] = v;
return;
}
/* update regs */
ic->regs[r] = v;
/* communication registers */
if ( r < 8 )
return;
/* channel setup */
if ( r < 0x28 ) {
int channel = ( r - 8 ) / 8;
switch ( ( r - 8 ) & 0x07 ) {
case 0: /* sample rate low */
ic->channels[channel].rate &= 0x0f00;
ic->channels[channel].rate |= v;
break;
case 1: /* sample rate high */
ic->channels[channel].rate &= 0x00ff;
ic->channels[channel].rate |= ( v & 0x0f ) << 8;
break;
case 2: /* size low */
ic->channels[channel].size &= 0xff00;
ic->channels[channel].size |= v;
break;
case 3: /* size high */
ic->channels[channel].size &= 0x00ff;
ic->channels[channel].size |= v << 8;
break;
case 4: /* start low */
ic->channels[channel].start &= 0xff00;
ic->channels[channel].start |= v;
break;
case 5: /* start high */
ic->channels[channel].start &= 0x00ff;
ic->channels[channel].start |= v << 8;
break;
case 6: /* bank */
ic->channels[channel].bank = v & 0xff;
break;
case 7: /* volume is 7 bits. Convert to 8 bits now. */
ic->channels[channel].volume = ( ( v & 0x7f ) << 1 ) | ( v & 1 );
break;
}
return;
}
switch( r ) {
case 0x2a: /* loop, ppcm */
for ( i = 0; i < 4; i++ )
ic->channels[i].loop = ( v & ( 1 << i ) ) != 0;
for ( i = 4; i < 8; i++ )
ic->channels[i-4].ppcm = ( v & ( 1 << i ) ) != 0;
break;
case 0x2c: /* pan */
ic->channels[0].pan = v & 7;
ic->channels[1].pan = ( v >> 3 ) & 7;
break;
case 0x2d: /* more pan */
ic->channels[2].pan = v & 7;
ic->channels[3].pan = ( v >> 3 ) & 7;
break;
case 0x2f: /* control */
ic->mode = v & 7;
/* bit 0 = read ROM */
/* bit 1 = enable sound output */
/* bit 2 = unknown */
break;
}
}
//READ8_DEVICE_HANDLER( k053260_r )
UINT8 k053260_r(void *chip, offs_t offset)
{
k053260_state *ic = (k053260_state *) chip;
switch ( offset ) {
case 0x29: /* channel status */
{
int i, status = 0;
for ( i = 0; i < 4; i++ )
status |= ic->channels[i].play << i;
return status;
}
break;
case 0x2e: /* read ROM */
if ( ic->mode & 1 )
{
UINT32 offs = ic->channels[0].start + ( ic->channels[0].pos >> BASE_SHIFT ) + ( ic->channels[0].bank << 16 );
ic->channels[0].pos += ( 1 << 16 );
if ( offs > ic->rom_size ) {
//logerror("%s: K53260: Attempting to read past ROM size in ROM Read Mode (offs = %06x, size = %06x).\n", device->machine().describe_context(),offs,ic->rom_size );
logerror("K53260: Attempting to read past ROM size in ROM Read Mode (offs = %06x, size = %06x).\n", offs,ic->rom_size );
return 0;
}
return ic->rom[offs];
}
break;
}
return ic->regs[offset];
}
void k053260_write_rom(void *chip, offs_t ROMSize, offs_t DataStart, offs_t DataLength,
const UINT8* ROMData)
{
k053260_state *info = (k053260_state *) chip;
if (info->rom_size != ROMSize)
{
info->rom = (UINT8*)realloc(info->rom, ROMSize);
info->rom_size = ROMSize;
memset(info->rom, 0xFF, ROMSize);
}
if (DataStart > ROMSize)
return;
if (DataStart + DataLength > ROMSize)
DataLength = ROMSize - DataStart;
memcpy(info->rom + DataStart, ROMData, DataLength);
return;
}
void k053260_set_mute_mask(void *chip, UINT32 MuteMask)
{
k053260_state *info = (k053260_state *) chip;
UINT8 CurChn;
for (CurChn = 0; CurChn < 4; CurChn ++)
info->channels[CurChn].Muted = (MuteMask >> CurChn) & 0x01;
}
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