aiie/audio/AY8910.h

130 lines
3.3 KiB
C
Raw Normal View History

/*
* Apple // emulator for *ix
*
* This software package is subject to the GNU General Public License
* version 3 or later (your choice) as published by the Free Software
* Foundation.
*
* Copyright 2013-2015 Aaron Culliney
*
*/
#ifndef AY8910_H
#define AY8910_H
#define MAX_8910 4
//-------------------------------------
// MAME interface
void _AYWriteReg(int chip, int r, int v
#if MB_TRACING
, FILE *mb_trace_fp
#endif
);
//void AY8910_write_ym(int chip, int addr, int data);
void AY8910_reset(int chip);
void AY8910Update(int chip, int16_t** buffer, int nNumSamples);
void AY8910_InitAll(int nClock, unsigned long nSampleRate);
void AY8910_InitClock(int nClock, unsigned long nSampleRate);
uint8_t* AY8910_GetRegsPtr(unsigned int uChip);
void AY8910UpdateSetCycles();
#if 1 // APPLE2IX
bool _ay8910_saveState(StateHelper_s *helper, unsigned int chip);
bool _ay8910_loadState(StateHelper_s *helper, unsigned int chip);
# if TESTING
int _ay8910_testAssertA2V2(unsigned int chip, uint8_t **exData);
# endif
#else
UINT AY8910_SaveSnapshot(class YamlSaveHelper& yamlSaveHelper, UINT uChip, std::string& suffix);
UINT AY8910_LoadSnapshot(class YamlLoadHelper& yamlLoadHelper, UINT uChip, std::string& suffix);
#endif
#if MB_TRACING
void _mb_trace_AY8910(int chip, FILE *mb_trace_fp);
#endif
//-------------------------------------
// FUSE stuff
typedef unsigned long libspectrum_dword;
typedef uint8_t libspectrum_byte;
typedef int16_t libspectrum_signed_word;
struct CAY8910;
/* max. number of sub-frame AY port writes allowed;
* given the number of port writes theoretically possible in a
* 50th I think this should be plenty.
*/
#define AY_CHANGE_MAX 8000
/*
class CAY8910
{
public:
*/
void CAY8910_init(struct CAY8910 *_this);
void sound_ay_init(struct CAY8910 *_this);
//void sound_init(struct CAY8910 *_this, const char *device);
void sound_ay_write(struct CAY8910 *_this, int reg, int val, libspectrum_dword now);
void sound_ay_reset(struct CAY8910 *_this);
void sound_frame(struct CAY8910 *_this);
uint8_t* GetAYRegsPtr(struct CAY8910 *_this);
void SetCLK(double CLK);
#if 1 // APPLE2IX
#else
void SaveSnapshot(class YamlSaveHelper& yamlSaveHelper, std::string& suffix);
bool LoadSnapshot(class YamlLoadHelper& yamlLoadHelper, std::string& suffix);
#endif
/*
private:
void init( void );
void sound_end( void );
void sound_ay_overlay( void );
*/
typedef struct ay_change_tag
{
libspectrum_dword tstates;
unsigned short ofs;
unsigned char reg, val;
} ay_change_tag;
/*
private:
*/
typedef struct CAY8910
{
/* foo_subcycles are fixed-point with low 16 bits as fractional part.
* The other bits count as the chip does.
*/
unsigned int ay_tone_tick[3], ay_tone_high[3], ay_noise_tick;
unsigned int ay_tone_subcycles, ay_env_subcycles;
unsigned int ay_env_internal_tick, ay_env_tick;
unsigned int ay_tick_incr;
unsigned int ay_tone_period[3], ay_noise_period, ay_env_period;
//static int beeper_last_subpos[2] = { 0, 0 };
/* Local copy of the AY registers */
libspectrum_byte sound_ay_registers[16];
struct ay_change_tag ay_change[ AY_CHANGE_MAX ];
int ay_change_count;
// statics from sound_ay_overlay()
int rng;
int noise_toggle;
int env_first, env_rev, env_counter;
} CAY8910;
// Vars shared between all AY's
extern double m_fCurrentCLK_AY8910;
#endif