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removed useless printf
[picodrive.git] / Pico / sound / sound.c
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1// This is part of Pico Library\r
2\r
3// (c) Copyright 2004 Dave, All rights reserved.\r
4// (c) Copyright 2006,2007 notaz, All rights reserved.\r
5// Free for non-commercial use.\r
6\r
7// For commercial use, separate licencing terms must be obtained.\r
8\r
9\r
10#include <string.h>\r
11#include "ym2612.h"\r
12#include "sn76496.h"\r
13\r
14#include "../PicoInt.h"\r
15#include "../cd/pcm.h"\r
16#include "mix.h"\r
17\r
18void (*PsndMix_32_to_16l)(short *dest, int *src, int count) = mix_32_to_16l_stereo;\r
19\r
20// master int buffer to mix to\r
21static int PsndBuffer[2*44100/50];\r
22\r
23// dac\r
24static unsigned short dac_info[312]; // pppppppp ppppllll, p - pos in buff, l - length to write for this sample\r
25\r
26// for Pico\r
27int PsndRate=0;\r
28int PsndLen=0; // number of mono samples, multiply by 2 for stereo\r
29int PsndLen_exc_add=0; // this is for non-integer sample counts per line, eg. 22050/60\r
30int PsndLen_exc_cnt=0;\r
31short *PsndOut=NULL; // PCM data buffer\r
32\r
33// sn76496\r
34extern int *sn76496_regs;\r
35\r
36\r
37static void dac_recalculate(void)\r
38{\r
39 int i, dac_cnt, pos, len, lines = Pico.m.pal ? 312 : 262, mid = Pico.m.pal ? 68 : 93;\r
40\r
41 if(PsndLen <= lines) {\r
42 // shrinking algo\r
43 dac_cnt = -PsndLen;\r
44 len=1; pos=0;\r
45 dac_info[225] = 1;\r
46\r
47 for(i=226; i != 225; i++) {\r
48 if (i >= lines) i = 0;\r
49 len = 0;\r
50 if(dac_cnt < 0) {\r
51 len=1;\r
52 pos++;\r
53 dac_cnt += lines;\r
54 }\r
55 dac_cnt -= PsndLen;\r
56 dac_info[i] = (pos<<4)|len;\r
57 }\r
58 } else {\r
59 // stretching\r
60 dac_cnt = PsndLen;\r
61 pos=0;\r
62 for(i = 225; i != 224; i++) {\r
63 if (i >= lines) i = 0;\r
64 len=0;\r
65 while(dac_cnt >= 0) {\r
66 dac_cnt -= lines;\r
67 len++;\r
68 }\r
69 if (i == mid) // midpoint\r
70 while(pos+len < PsndLen/2) {\r
71 dac_cnt -= lines;\r
72 len++;\r
73 }\r
74 dac_cnt += PsndLen;\r
75 dac_info[i] = (pos<<4)|len;\r
76 pos+=len;\r
77 }\r
78 // last sample\r
79 for(len = 0, i = pos; i < PsndLen; i++) len++;\r
80 if (PsndLen_exc_add) len++;\r
81 dac_info[224] = (pos<<4)|len;\r
82 }\r
83 //for(i=len=0; i < lines; i++) {\r
84 // printf("%03i : %03i : %i\n", i, dac_info[i]>>4, dac_info[i]&0xf);\r
85 // len+=dac_info[i]&0xf;\r
86 //}\r
87 //printf("rate is %i, len %f\n", PsndRate, (double)PsndRate/(Pico.m.pal ? 50.0 : 60.0));\r
88 //printf("len total: %i, last pos: %i\n", len, pos);\r
89 //exit(8);\r
90}\r
91\r
92\r
93PICO_INTERNAL void PsndReset(void)\r
94{\r
95 void *ym2612_regs;\r
96\r
97 // also clear the internal registers+addr line\r
98 ym2612_regs = YM2612GetRegs();\r
99 memset(ym2612_regs, 0, 0x200+4);\r
100 z80startCycle = z80stopCycle = 0;\r
101\r
102 PsndRerate(0);\r
103}\r
104\r
105\r
106// to be called after changing sound rate or chips\r
107void PsndRerate(int preserve_state)\r
108{\r
109 void *state = NULL;\r
110 int target_fps = Pico.m.pal ? 50 : 60;\r
111\r
112 // not all rates are supported in MCD mode due to mp3 decoder limitations\r
113 if (PicoAHW & PAHW_MCD) {\r
114 if (PsndRate != 11025 && PsndRate != 22050 && PsndRate != 44100) PsndRate = 22050;\r
115 PicoOpt |= POPT_EN_STEREO; // force stereo\r
116 }\r
117\r
118 if (preserve_state) {\r
119 state = malloc(0x200);\r
120 if (state == NULL) return;\r
121 memcpy(state, YM2612GetRegs(), 0x200);\r
122 if ((PicoAHW & PAHW_MCD) && Pico_mcd->m.audio_track)\r
123 Pico_mcd->m.audio_offset = mp3_get_offset();\r
124 }\r
125 YM2612Init(Pico.m.pal ? OSC_PAL/7 : OSC_NTSC/7, PsndRate);\r
126 if (preserve_state) {\r
127 // feed it back it's own registers, just like after loading state\r
128 memcpy(YM2612GetRegs(), state, 0x200);\r
129 YM2612PicoStateLoad();\r
130 if ((PicoAHW & PAHW_MCD) && Pico_mcd->m.audio_track)\r
131 mp3_start_play(Pico_mcd->TOC.Tracks[Pico_mcd->m.audio_track].F, Pico_mcd->m.audio_offset);\r
132 }\r
133\r
134 if (preserve_state) memcpy(state, sn76496_regs, 28*4); // remember old state\r
135 SN76496_init(Pico.m.pal ? OSC_PAL/15 : OSC_NTSC/15, PsndRate);\r
136 if (preserve_state) memcpy(sn76496_regs, state, 28*4); // restore old state\r
137\r
138 if (state)\r
139 free(state);\r
140\r
141 // calculate PsndLen\r
142 PsndLen=PsndRate / target_fps;\r
143 PsndLen_exc_add=((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
144 PsndLen_exc_cnt=0;\r
145\r
146 // recalculate dac info\r
147 dac_recalculate();\r
148\r
149 if (PicoAHW & PAHW_MCD)\r
150 pcm_set_rate(PsndRate);\r
151\r
152 // clear all buffers\r
153 memset32(PsndBuffer, 0, sizeof(PsndBuffer)/4);\r
154 if (PsndOut)\r
155 PsndClear();\r
156\r
157 // set mixer\r
158 PsndMix_32_to_16l = (PicoOpt & POPT_EN_STEREO) ? mix_32_to_16l_stereo : mix_32_to_16_mono;\r
159}\r
160\r
161\r
162// This is called once per raster (aka line), but not necessarily for every line\r
163PICO_INTERNAL void Psnd_timers_and_dac(int raster)\r
164{\r
165 int pos, len;\r
166 int do_dac = PsndOut && (PicoOpt&POPT_EN_FM) && *ym2612_dacen;\r
167// int do_pcm = PsndOut && (PicoAHW&1) && (PicoOpt&0x400);\r
168\r
169 // Our raster lasts 63.61323/64.102564 microseconds (NTSC/PAL)\r
170 YM2612PicoTick(1);\r
171\r
172 if (!do_dac /*&& !do_pcm*/) return;\r
173\r
174 pos=dac_info[raster], len=pos&0xf;\r
175 if (!len) return;\r
176\r
177 pos>>=4;\r
178\r
179 if (do_dac)\r
180 {\r
181 short *d = PsndOut + pos*2;\r
182 int dout = *ym2612_dacout;\r
183 if(PicoOpt&POPT_EN_STEREO) {\r
184 // some manual loop unrolling here :)\r
185 d[0] = dout;\r
186 if (len > 1) {\r
187 d[2] = dout;\r
188 if (len > 2)\r
189 d[4] = dout;\r
190 }\r
191 } else {\r
192 short *d = PsndOut + pos;\r
193 d[0] = dout;\r
194 if (len > 1) {\r
195 d[1] = dout;\r
196 if (len > 2)\r
197 d[2] = dout;\r
198 }\r
199 }\r
200 }\r
201\r
202#if 0\r
203 if (do_pcm) {\r
204 int *d = PsndBuffer;\r
205 d += (PicoOpt&8) ? pos*2 : pos;\r
206 pcm_update(d, len, 1);\r
207 }\r
208#endif\r
209}\r
210\r
211\r
212PICO_INTERNAL void PsndClear(void)\r
213{\r
214 int len = PsndLen;\r
215 if (PsndLen_exc_add) len++;\r
216 if (PicoOpt & POPT_EN_STEREO)\r
217 memset32((int *) PsndOut, 0, len); // assume PsndOut to be aligned\r
218 else {\r
219 short *out = PsndOut;\r
220 if ((int)out & 2) { *out++ = 0; len--; }\r
221 memset32((int *) out, 0, len/2);\r
222 if (len & 1) out[len-1] = 0;\r
223 }\r
224}\r
225\r
226\r
227PICO_INTERNAL int PsndRender(int offset, int length)\r
228{\r
229 int buf32_updated = 0;\r
230 int *buf32 = PsndBuffer+offset;\r
231 int stereo = (PicoOpt & 8) >> 3;\r
232 // emulating CD && PCM option enabled && PCM chip on && have enabled channels\r
233 int do_pcm = (PicoAHW & PAHW_MCD) && (PicoOpt&POPT_EN_MCD_PCM) &&\r
234 (Pico_mcd->pcm.control & 0x80) && Pico_mcd->pcm.enabled;\r
235 offset <<= stereo;\r
236\r
237#if !SIMPLE_WRITE_SOUND\r
238 if (offset == 0) { // should happen once per frame\r
239 // compensate for float part of PsndLen\r
240 PsndLen_exc_cnt += PsndLen_exc_add;\r
241 if (PsndLen_exc_cnt >= 0x10000) {\r
242 PsndLen_exc_cnt -= 0x10000;\r
243 length++;\r
244 }\r
245 }\r
246#endif\r
247\r
248 // PSG\r
249 if (PicoOpt & POPT_EN_PSG)\r
250 SN76496Update(PsndOut+offset, length, stereo);\r
251\r
252 // Add in the stereo FM buffer\r
253 if (PicoOpt & POPT_EN_FM) {\r
254 buf32_updated = YM2612UpdateOne(buf32, length, stereo, 1);\r
255 } else\r
256 memset32(buf32, 0, length<<stereo);\r
257\r
258//printf("active_chs: %02x\n", buf32_updated);\r
259\r
260 // CD: PCM sound\r
261 if (do_pcm) {\r
262 pcm_update(buf32, length, stereo);\r
263 //buf32_updated = 1;\r
264 }\r
265\r
266 // CD: CDDA audio\r
267 // CD mode, cdda enabled, not data track, CDC is reading\r
268 if ((PicoAHW & PAHW_MCD) && (PicoOpt & POPT_EN_MCD_CDDA) &&\r
269 !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))\r
270 mp3_update(buf32, length, stereo);\r
271\r
272 // convert + limit to normal 16bit output\r
273 PsndMix_32_to_16l(PsndOut+offset, buf32, length);\r
274\r
275 return length;\r
276}\r
277\r
278\r
279\r
280#if defined(_USE_MZ80)\r
281\r
282// memhandlers for mz80 core\r
283unsigned char mz80_read(UINT32 a, struct MemoryReadByte *w) { return z80_read(a); }\r
284void mz80_write(UINT32 a, UINT8 d, struct MemoryWriteByte *w) { z80_write(d, a); }\r
285\r
286// structures for mz80 core\r
287static struct MemoryReadByte mz80_mem_read[]=\r
288{\r
289 {0x0000,0xffff,mz80_read},\r
290 {(UINT32) -1,(UINT32) -1,NULL}\r
291};\r
292static struct MemoryWriteByte mz80_mem_write[]=\r
293{\r
294 {0x0000,0xffff,mz80_write},\r
295 {(UINT32) -1,(UINT32) -1,NULL}\r
296};\r
297static struct z80PortRead mz80_io_read[] ={\r
298 {(UINT16) -1,(UINT16) -1,NULL}\r
299};\r
300static struct z80PortWrite mz80_io_write[]={\r
301 {(UINT16) -1,(UINT16) -1,NULL}\r
302};\r
303\r
304int mz80_run(int cycles)\r
305{\r
306 int ticks_pre = mz80GetElapsedTicks(0);\r
307 mz80exec(cycles);\r
308 return mz80GetElapsedTicks(0) - ticks_pre;\r
309}\r
310\r
311#elif defined(_USE_DRZ80)\r
312\r
313struct DrZ80 drZ80;\r
314\r
315static unsigned int DrZ80_rebasePC(unsigned short a)\r
316{\r
317 drZ80.Z80PC_BASE = (unsigned int) Pico.zram;\r
318 return drZ80.Z80PC_BASE + a;\r
319}\r
320\r
321static unsigned int DrZ80_rebaseSP(unsigned short a)\r
322{\r
323 drZ80.Z80SP_BASE = (unsigned int) Pico.zram;\r
324 return drZ80.Z80SP_BASE + a;\r
325}\r
326\r
327static void DrZ80_irq_callback()\r
328{\r
329 drZ80.Z80_IRQ = 0; // lower irq when accepted\r
330}\r
331#endif\r
332\r
333#if defined(_USE_DRZ80) || defined(_USE_CZ80)\r
334static unsigned char z80_in(unsigned short p)\r
335{\r
336 elprintf(EL_ANOMALY, "Z80 port %04x read", p);\r
337 return 0xff;\r
338}\r
339\r
340static void z80_out(unsigned short p,unsigned char d)\r
341{\r
342 elprintf(EL_ANOMALY, "Z80 port %04x write %02x", p, d);\r
343}\r
344#endif\r
345\r
346\r
347// z80 functionality wrappers\r
348PICO_INTERNAL void z80_init(void)\r
349{\r
350#if defined(_USE_MZ80)\r
351 struct mz80context z80;\r
352\r
353 // z80\r
354 mz80init();\r
355 // Modify the default context\r
356 mz80GetContext(&z80);\r
357\r
358 // point mz80 stuff\r
359 z80.z80Base=Pico.zram;\r
360 z80.z80MemRead=mz80_mem_read;\r
361 z80.z80MemWrite=mz80_mem_write;\r
362 z80.z80IoRead=mz80_io_read;\r
363 z80.z80IoWrite=mz80_io_write;\r
364\r
365 mz80SetContext(&z80);\r
366\r
367#elif defined(_USE_DRZ80)\r
368 memset(&drZ80, 0, sizeof(struct DrZ80));\r
369 drZ80.z80_rebasePC=DrZ80_rebasePC;\r
370 drZ80.z80_rebaseSP=DrZ80_rebaseSP;\r
371 drZ80.z80_read8 =z80_read;\r
372 drZ80.z80_read16 =z80_read16;\r
373 drZ80.z80_write8 =z80_write;\r
374 drZ80.z80_write16 =z80_write16;\r
375 drZ80.z80_in =z80_in;\r
376 drZ80.z80_out =z80_out;\r
377 drZ80.z80_irq_callback=DrZ80_irq_callback;\r
378\r
379#elif defined(_USE_CZ80)\r
380 memset(&CZ80, 0, sizeof(CZ80));\r
381 Cz80_Init(&CZ80);\r
382 Cz80_Set_Fetch(&CZ80, 0x0000, 0x1fff, (UINT32)Pico.zram); // main RAM\r
383 Cz80_Set_Fetch(&CZ80, 0x2000, 0x3fff, (UINT32)Pico.zram); // mirror\r
384 Cz80_Set_ReadB(&CZ80, (UINT8 (*)(UINT32 address))z80_read); // unused (hacked in)\r
385 Cz80_Set_WriteB(&CZ80, z80_write);\r
386 Cz80_Set_INPort(&CZ80, z80_in);\r
387 Cz80_Set_OUTPort(&CZ80, z80_out);\r
388#endif\r
389}\r
390\r
391PICO_INTERNAL void z80_reset(void)\r
392{\r
393#if defined(_USE_MZ80)\r
394 mz80reset();\r
395#elif defined(_USE_DRZ80)\r
396 memset(&drZ80, 0, 0x54);\r
397 drZ80.Z80F = (1<<2); // set ZFlag\r
398 drZ80.Z80F2 = (1<<2); // set ZFlag\r
399 drZ80.Z80IX = 0xFFFF << 16;\r
400 drZ80.Z80IY = 0xFFFF << 16;\r
401 drZ80.Z80IM = 0; // 1?\r
402 drZ80.Z80PC = drZ80.z80_rebasePC(0);\r
403 drZ80.Z80SP = drZ80.z80_rebaseSP(0x2000); // 0xf000 ?\r
404#elif defined(_USE_CZ80)\r
405 Cz80_Reset(&CZ80);\r
406 Cz80_Set_Reg(&CZ80, CZ80_IX, 0xffff);\r
407 Cz80_Set_Reg(&CZ80, CZ80_IY, 0xffff);\r
408 Cz80_Set_Reg(&CZ80, CZ80_SP, 0x2000);\r
409#endif\r
410 Pico.m.z80_fakeval = 0; // for faking when Z80 is disabled\r
411}\r
412\r
413\r
414PICO_INTERNAL void z80_pack(unsigned char *data)\r
415{\r
416#if defined(_USE_MZ80)\r
417 struct mz80context mz80;\r
418 *(int *)data = 0x00005A6D; // "mZ"\r
419 mz80GetContext(&mz80);\r
420 memcpy(data+4, &mz80.z80clockticks, sizeof(mz80)-5*4); // don't save base&memhandlers\r
421#elif defined(_USE_DRZ80)\r
422 *(int *)data = 0x015A7244; // "DrZ" v1\r
423 drZ80.Z80PC = drZ80.z80_rebasePC(drZ80.Z80PC-drZ80.Z80PC_BASE);\r
424 drZ80.Z80SP = drZ80.z80_rebaseSP(drZ80.Z80SP-drZ80.Z80SP_BASE);\r
425 memcpy(data+4, &drZ80, 0x54);\r
426#elif defined(_USE_CZ80)\r
427 *(int *)data = 0x00007a43; // "Cz"\r
428 *(int *)(data+4) = Cz80_Get_Reg(&CZ80, CZ80_PC);\r
429 memcpy(data+8, &CZ80, (INT32)&CZ80.BasePC - (INT32)&CZ80);\r
430#endif\r
431}\r
432\r
433PICO_INTERNAL void z80_unpack(unsigned char *data)\r
434{\r
435#if defined(_USE_MZ80)\r
436 if (*(int *)data == 0x00005A6D) { // "mZ" save?\r
437 struct mz80context mz80;\r
438 mz80GetContext(&mz80);\r
439 memcpy(&mz80.z80clockticks, data+4, sizeof(mz80)-5*4);\r
440 mz80SetContext(&mz80);\r
441 } else {\r
442 z80_reset();\r
443 z80_int();\r
444 }\r
445#elif defined(_USE_DRZ80)\r
446 if (*(int *)data == 0x015A7244) { // "DrZ" v1 save?\r
447 memcpy(&drZ80, data+4, 0x54);\r
448 // update bases\r
449 drZ80.Z80PC = drZ80.z80_rebasePC(drZ80.Z80PC-drZ80.Z80PC_BASE);\r
450 drZ80.Z80SP = drZ80.z80_rebaseSP(drZ80.Z80SP-drZ80.Z80SP_BASE);\r
451 } else {\r
452 z80_reset();\r
453 drZ80.Z80IM = 1;\r
454 z80_int(); // try to goto int handler, maybe we won't execute trash there?\r
455 }\r
456#elif defined(_USE_CZ80)\r
457 if (*(int *)data == 0x00007a43) { // "Cz" save?\r
458 memcpy(&CZ80, data+8, (INT32)&CZ80.BasePC - (INT32)&CZ80);\r
459 Cz80_Set_Reg(&CZ80, CZ80_PC, *(int *)(data+4));\r
460 } else {\r
461 z80_reset();\r
462 z80_int();\r
463 }\r
464#endif\r
465}\r
466\r
467PICO_INTERNAL void z80_exit(void)\r
468{\r
469#if defined(_USE_MZ80)\r
470 mz80shutdown();\r
471#endif\r
472}\r
473\r
474#if 1 // defined(__DEBUG_PRINT) || defined(__GP2X__) || defined(__GIZ__)\r
475PICO_INTERNAL void z80_debug(char *dstr)\r
476{\r
477#if defined(_USE_DRZ80)\r
478 sprintf(dstr, "Z80 state: PC: %04x SP: %04x\n", drZ80.Z80PC-drZ80.Z80PC_BASE, drZ80.Z80SP-drZ80.Z80SP_BASE);\r
479#elif defined(_USE_CZ80)\r
480 sprintf(dstr, "Z80 state: PC: %04x SP: %04x\n", CZ80.PC - CZ80.BasePC, CZ80.SP.W);\r
481#endif\r
482}\r
483#endif\r
fast MegaDrive/MegaCD/32X emulator