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Diffstat (limited to 'trunk/src/emu/sound/k054539.h')
-rw-r--r-- | trunk/src/emu/sound/k054539.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/trunk/src/emu/sound/k054539.h b/trunk/src/emu/sound/k054539.h new file mode 100644 index 00000000000..f49ab6d0098 --- /dev/null +++ b/trunk/src/emu/sound/k054539.h @@ -0,0 +1,117 @@ +/********************************************************* + + 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__ */ |