2 header file for software emulation for FM sound generator
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8 /* compiler dependence */
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9 #include "../pico_types.h"
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11 typedef u8 UINT8; /* unsigned 8bit */
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12 typedef u16 UINT16; /* unsigned 16bit */
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13 typedef u32 UINT32; /* unsigned 32bit */
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16 typedef s8 INT8; /* signed 8bit */
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17 typedef s16 INT16; /* signed 16bit */
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18 typedef s32 INT32; /* signed 32bit */
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22 /* struct describing a single operator (SLOT) */
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25 INT32 *DT; /* #0x00 detune :dt_tab[DT] */
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26 UINT8 ar; /* #0x04 attack rate */
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27 UINT8 d1r; /* #0x05 decay rate */
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28 UINT8 d2r; /* #0x06 sustain rate */
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29 UINT8 rr; /* #0x07 release rate */
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30 UINT32 mul; /* #0x08 multiple :ML_TABLE[ML] */
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32 /* Phase Generator */
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33 UINT32 phase; /* #0x0c phase counter | need_save */
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34 UINT32 Incr; /* #0x10 phase step */
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36 UINT8 KSR; /* #0x14 key scale rate :3-KSR */
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37 UINT8 ksr; /* #0x15 key scale rate :kcode>>(3-KSR) */
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39 UINT8 key; /* #0x16 0=last key was KEY OFF, 1=KEY ON */
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41 /* Envelope Generator */
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42 UINT8 state; /* #0x17 phase type: EG_OFF=0, EG_REL, EG_SUS, EG_DEC, EG_ATT | need_save */
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43 UINT16 tl; /* #0x18 total level: TL << 3 */
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44 INT16 volume; /* #0x1a envelope counter | need_save */
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45 UINT32 sl; /* #0x1c sustain level:sl_table[SL] */
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47 /* asm relies on this order: */
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50 UINT32 eg_pack_rr; /* #0x20 1 (release state) */
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51 UINT32 eg_pack_d2r; /* #0x24 2 (sustain state) */
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52 UINT32 eg_pack_d1r; /* #0x28 3 (decay state) */
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53 UINT32 eg_pack_ar; /* #0x2c 4 (attack state) */
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58 UINT8 ssg; /* 0x30 SSG-EG waveform */
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60 UINT16 ar_ksr; /* 0x32 ar+ksr */
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61 UINT16 vol_out; /* 0x34 current output from EG (without LFO) */
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68 FM_SLOT SLOT[4]; /* four SLOTs (operators) */
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70 UINT8 ALGO; /* +00 algorithm */
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71 UINT8 FB; /* feedback shift */
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73 INT32 op1_out; /* op1 output for feedback */
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75 INT32 mem_value; /* +08 delayed sample (MEM) value */
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77 INT32 pms; /* channel PMS */
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78 UINT8 ams; /* channel AMS */
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80 UINT8 kcode; /* +11 key code: */
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82 UINT8 upd_cnt; /* eg update counter */
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83 UINT32 fc; /* fnum,blk:adjusted to sample rate */
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84 UINT32 block_fnum; /* current blk/fnum value for this slot (can be different betweeen slots of one channel in 3slot mode) */
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87 UINT8 AMmasks; /* AM enable flag */
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93 int clock; /* master clock (Hz) */
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94 int rate; /* sampling rate (Hz) */
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95 double freqbase; /* 08 frequency base */
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96 UINT8 address; /* 10 address register | need_save */
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97 UINT8 status; /* 11 status flag | need_save */
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98 UINT8 mode; /* mode CSM / 3SLOT */
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99 UINT8 flags; /* operational flags */
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100 int TA; /* timer a */
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101 int TAC; /* timer a maxval */
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102 int TAT; /* timer a ticker | need_save */
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103 UINT8 TB; /* timer b */
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104 UINT8 fn_h; /* freq latch */
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106 int TBC; /* timer b maxval */
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107 int TBT; /* timer b ticker | need_save */
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108 /* local time tables */
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109 INT32 dt_tab[8][32];/* DeTune table */
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115 /***********************************************************/
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117 /***********************************************************/
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119 /* OPN 3slot struct */
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122 UINT32 fc[3]; /* fnum3,blk3: calculated */
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123 UINT8 fn_h; /* freq3 latch */
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124 UINT8 kcode[3]; /* key code */
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125 UINT32 block_fnum[3]; /* current fnum value for this slot (can be different betweeen slots of one channel in 3slot mode) */
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128 /* OPN/A/B common state */
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131 FM_ST ST; /* general state */
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132 FM_3SLOT SL3; /* 3 slot mode state */
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133 UINT32 pan; /* fm channels output mask (bit 1 = enable) */
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135 UINT32 eg_cnt; /* global envelope generator counter | need_save */
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136 UINT32 eg_timer; /* global envelope generator counter works at frequency = chipclock/64/3 | need_save */
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137 UINT32 eg_timer_add; /* step of eg_timer */
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140 UINT32 lfo_cnt; /* need_save */
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143 UINT32 lfo_freq[8]; /* LFO FREQ table */
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146 /* here's the virtual YM2612 */
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149 UINT8 REGS[0x200]; /* registers (for save states) */
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150 INT32 addr_A1; /* address line A1 | need_save */
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152 FM_CH CH[6]; /* channel state */
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154 /* dac output (YM2612) */
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158 FM_OPN OPN; /* OPN state */
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160 UINT32 slot_mask; /* active slot mask (performance hack) */
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161 UINT32 ssg_mask; /* active ssg mask (performance hack) */
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165 #ifndef EXTERNAL_YM2612
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166 extern YM2612 ym2612;
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169 void YM2612Init_(int baseclock, int rate, int flags);
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170 void YM2612ResetChip_(void);
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171 int YM2612UpdateOne_(s32 *buffer, int length, int stereo, int is_buf_empty);
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173 int YM2612Write_(unsigned int a, unsigned int v);
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174 //unsigned char YM2612Read_(void);
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176 int YM2612PicoTick_(int n);
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177 void YM2612PicoStateLoad_(void);
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179 void *YM2612GetRegs(void);
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180 void YM2612PicoStateSave2(int tat, int tbt, int busy);
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181 int YM2612PicoStateLoad2(int *tat, int *tbt, int *busy);
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183 /* NB must be macros for compiling GP2X 940 code */
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185 #define YM2612Init YM2612Init_
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186 #define YM2612ResetChip YM2612ResetChip_
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187 #define YM2612UpdateOne YM2612UpdateOne_
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188 #define YM2612PicoStateLoad YM2612PicoStateLoad_
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190 /* GP2X specific */
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191 #include <platform/gp2x/940ctl.h>
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192 #define YM2612Init(baseclock, rate, flags) \
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193 (PicoIn.opt & POPT_EXT_FM ? YM2612Init_940 : YM2612Init_)(baseclock, rate, flags)
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194 #define YM2612ResetChip() \
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195 (PicoIn.opt & POPT_EXT_FM ? YM2612ResetChip_940 : YM2612ResetChip_)()
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196 #define YM2612PicoStateLoad() \
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197 (PicoIn.opt & POPT_EXT_FM ? YM2612PicoStateLoad_940 : YM2612PicoStateLoad_)()
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198 #define YM2612UpdateOne(buffer, length, sterao, isempty) \
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199 (PicoIn.opt & POPT_EXT_FM ? YM2612UpdateOne_940 : YM2612UpdateOne_)(buffer, length, stereo, isempty)
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200 #endif /* __GP2X__ */
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203 #endif /* _H_FM_FM_ */
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