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/*********************************************************
Konami 054539 PCM Sound Chip
*********************************************************/
#pragma once
#ifndef __K054539_H__
#define __K054539_H__
#define MCFG_K054539_ADD(_tag, _clock, _interface) \
MCFG_DEVICE_ADD(_tag, K054539, _clock) \
k054539_device::static_set_interface(*device, _interface);
struct k054539_interface
{
const char *rgnoverride;
void (*apan)(device_t *, double, double); /* Callback for analog output mixing levels (0..1 for each channel) */
void (*irq)(device_t *);
};
//* control flags, may be set at DRIVER_INIT().
#define K054539_RESET_FLAGS 0
#define K054539_REVERSE_STEREO 1
#define K054539_DISABLE_REVERB 2
#define K054539_UPDATE_AT_KEYON 4
void k054539_init_flags(device_t *device, int flags);
void k054539_set_gain(device_t *device, int channel, double gain);
class k054539_device : public device_t,
public device_sound_interface,
public k054539_interface
{
public:
enum {
RESET_FLAGS = 0,
REVERSE_STEREO = 1,
DISABLE_REVERB = 2,
UPDATE_AT_KEYON = 4
};
// construction/destruction
k054539_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// static configuration helpers
static void static_set_interface(device_t &device, const k054539_interface &interface);
DECLARE_WRITE8_MEMBER(write);
DECLARE_READ8_MEMBER(read);
void init_flags(int flags);
/*
Note that the eight PCM channels of a K054539 do not have separate
volume controls. Considering the global attenuation equation may not
be entirely accurate, k054539_set_gain() provides means to control
channel gain. It can be called anywhere but preferrably from
DRIVER_INIT().
Parameters:
channel : 0 - 7
gain : 0.0=silent, 1.0=no gain, 2.0=twice as loud, etc.
*/
void set_gain(int channel, double gain);
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
// device_sound_interface overrides
virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples);
private:
struct channel {
UINT32 pos;
UINT32 pfrac;
INT32 val;
INT32 pval;
};
double voltab[256];
double pantab[0xf];
double gain[8];
UINT8 posreg_latch[8][3];
int flags;
unsigned char regs[0x230];
unsigned char *ram;
int reverb_pos;
INT32 cur_ptr;
int cur_limit;
unsigned char *cur_zone;
unsigned char *rom;
UINT32 rom_size;
UINT32 rom_mask;
channel channels[8];
sound_stream *stream;
bool regupdate();
void keyon(int channel);
void keyoff(int channel);
void init_chip();
void reset_zones();
};
extern const device_type K054539;
#endif /* __K054539_H__ */
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