diff options
Diffstat (limited to 'src/emu/sound/k053260.c')
-rw-r--r-- | src/emu/sound/k053260.c | 487 |
1 files changed, 487 insertions, 0 deletions
diff --git a/src/emu/sound/k053260.c b/src/emu/sound/k053260.c new file mode 100644 index 00000000000..82179687dcb --- /dev/null +++ b/src/emu/sound/k053260.c @@ -0,0 +1,487 @@ +/********************************************************* + + Konami 053260 PCM Sound Chip + +*********************************************************/ + +#include "sndintrf.h" +#include "streams.h" +#include "cpuintrf.h" +#include "k053260.h" + +/* 2004-02-28: Fixed ppcm decoding. Games sound much better now.*/ + +#define LOG 0 + +#define BASE_SHIFT 16 + +struct K053260_channel_def { + unsigned long rate; + unsigned long size; + unsigned long start; + unsigned long bank; + unsigned long volume; + int play; + unsigned long pan; + unsigned long pos; + int loop; + int ppcm; /* packed PCM ( 4 bit signed ) */ + int ppcm_data; +}; +struct K053260_chip_def { + sound_stream * channel; + int mode; + int regs[0x30]; + unsigned char *rom; + int rom_size; + unsigned long *delta_table; + struct K053260_channel_def channels[4]; + const struct K053260_interface *intf; +}; + + +static void InitDeltaTable( struct K053260_chip_def *ic, int rate, int clock ) { + int i; + double base = ( double )rate; + double max = (double)(clock); /* Hz */ + unsigned long 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 = ( unsigned long )target; + if ( val == 0 ) + val = 1; + } else + val = 1; + + ic->delta_table[i] = val; + } +} + +static void K053260_reset( void *chip ) { + struct K053260_chip_def *ic = 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 MINOUT -0x8000 + +void K053260_update( void * param, stream_sample_t **inputs, stream_sample_t **buffer, int length ) { + static 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]; + unsigned long delta[4], end[4], pos[4]; + int dataL, dataR; + signed char d; + struct K053260_chip_def *ic = param; + + /* 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 < length; 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; + } + } + } + + buffer[1][j] = limit( dataL, MAXOUT, MINOUT ); + buffer[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 void *k053260_start(int sndindex, int clock, const void *config) +{ + struct K053260_chip_def *ic; + int rate = clock / 32; + int i; + + ic = auto_malloc(sizeof(*ic)); + memset(ic, 0, sizeof(*ic)); + + /* Initialize our chip structure */ + ic->intf = config; + + ic->mode = 0; + ic->rom = memory_region(ic->intf->region); + ic->rom_size = memory_region_length(ic->intf->region) - 1; + + K053260_reset( ic ); + + for ( i = 0; i < 0x30; i++ ) + ic->regs[i] = 0; + + ic->delta_table = ( unsigned long * )auto_malloc( 0x1000 * sizeof( unsigned long ) ); + + ic->channel = stream_create( 0, 2, rate, ic, K053260_update ); + + InitDeltaTable( ic, rate, clock ); + + /* setup SH1 timer if necessary */ + if ( ic->intf->irq ) + timer_pulse( attotime_mul(ATTOTIME_IN_HZ(clock), 32), 0, ic->intf->irq ); + + return ic; +} + +INLINE void check_bounds( struct K053260_chip_def *ic, int channel ) { + + int channel_start = ( ic->channels[channel].bank << 16 ) + ic->channels[channel].start; + int 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 = %04lx, PPCM = %s\n", channel_start, channel_end, ic->channels[channel].rate, ic->channels[channel].ppcm ? "yes" : "no" ); +#endif +} + +void K053260_write( int chip, offs_t offset, UINT8 data ) +{ + int i, t; + int r = offset; + int v = data; + + struct K053260_chip_def *ic = sndti_token(SOUND_K053260, chip); + + if ( r > 0x2f ) { + logerror("K053260: Writing past registers\n" ); + return; + } + + stream_update( ic->channel); + + /* 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; + } +} + +UINT8 K053260_read( int chip, offs_t offset ) +{ + struct K053260_chip_def *ic = sndti_token(SOUND_K053260, 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 ) { + unsigned int 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("%06x: K53260: Attempting to read past rom size in rom Read Mode (offs = %06x, size = %06x).\n",activecpu_get_pc(),offs,ic->rom_size ); + + return 0; + } + + return ic->rom[offs]; + } + break; + } + + return ic->regs[offset]; +} + +/**************************************************************************************************/ +/* Accesors */ + +READ8_HANDLER( K053260_0_r ) +{ + return K053260_read( 0, offset ); +} + +WRITE8_HANDLER( K053260_0_w ) +{ + K053260_write( 0, offset, data ); +} + +READ8_HANDLER( K053260_1_r ) +{ + return K053260_read( 1, offset ); +} + +WRITE8_HANDLER( K053260_1_w ) +{ + K053260_write( 1, offset, data ); +} + +WRITE16_HANDLER( K053260_0_lsb_w ) +{ + if (ACCESSING_LSB) + K053260_0_w (offset, data & 0xff); +} + +READ16_HANDLER( K053260_0_lsb_r ) +{ + return K053260_0_r(offset); +} + +WRITE16_HANDLER( K053260_1_lsb_w ) +{ + if (ACCESSING_LSB) + K053260_1_w (offset, data & 0xff); +} + +READ16_HANDLER( K053260_1_lsb_r ) +{ + return K053260_1_r(offset); +} + + + + +/************************************************************************** + * Generic get_info + **************************************************************************/ + +static void k053260_set_info(void *token, UINT32 state, sndinfo *info) +{ + switch (state) + { + /* no parameters to set */ + } +} + + +void k053260_get_info(void *token, UINT32 state, sndinfo *info) +{ + switch (state) + { + /* --- the following bits of info are returned as 64-bit signed integers --- */ + + /* --- the following bits of info are returned as pointers to data or functions --- */ + case SNDINFO_PTR_SET_INFO: info->set_info = k053260_set_info; break; + case SNDINFO_PTR_START: info->start = k053260_start; break; + case SNDINFO_PTR_STOP: /* nothing */ break; + case SNDINFO_PTR_RESET: /* nothing */ break; + + /* --- the following bits of info are returned as NULL-terminated strings --- */ + case SNDINFO_STR_NAME: info->s = "K053260"; break; + case SNDINFO_STR_CORE_FAMILY: info->s = "Konami custom"; break; + case SNDINFO_STR_CORE_VERSION: info->s = "1.0"; break; + case SNDINFO_STR_CORE_FILE: info->s = __FILE__; break; + case SNDINFO_STR_CORE_CREDITS: info->s = "Copyright (c) 2004, The MAME Team"; break; + } +} + |