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get rid of port_config.h
[picodrive.git] / pico / sound / sound.c
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1/*\r
2 * PicoDrive\r
3 * (c) Copyright Dave, 2004\r
4 * (C) notaz, 2006-2009\r
5 *\r
6 * This work is licensed under the terms of MAME license.\r
7 * See COPYING file in the top-level directory.\r
8 */\r
9\r
10#include <string.h>\r
11#include "ym2612.h"\r
12#include "sn76496.h"\r
13#include "../pico_int.h"\r
14#include "../cd/pcm.h"\r
15#include "mix.h"\r
16\r
17#define SIMPLE_WRITE_SOUND 0\r
18\r
19void (*PsndMix_32_to_16l)(short *dest, int *src, int count) = mix_32_to_16l_stereo;\r
20\r
21// master int buffer to mix to\r
22static int PsndBuffer[2*(44100+100)/50];\r
23\r
24// dac\r
25static unsigned short dac_info[312+4]; // pppppppp ppppllll, p - pos in buff, l - length to write for this sample\r
26\r
27// cdda output buffer\r
28short cdda_out_buffer[2*1152];\r
29\r
30// for Pico\r
31int PsndRate=0;\r
32int PsndLen=0; // number of mono samples, multiply by 2 for stereo\r
33int PsndLen_exc_add=0; // this is for non-integer sample counts per line, eg. 22050/60\r
34int PsndLen_exc_cnt=0;\r
35int PsndDacLine=0;\r
36short *PsndOut=NULL; // PCM data buffer\r
37\r
38// timers\r
39int timer_a_next_oflow, timer_a_step; // in z80 cycles\r
40int timer_b_next_oflow, timer_b_step;\r
41\r
42// sn76496\r
43extern int *sn76496_regs;\r
44\r
45\r
46static void dac_recalculate(void)\r
47{\r
48 int i, dac_cnt, pos, len, lines = Pico.m.pal ? 312 : 262, mid = Pico.m.pal ? 68 : 93;\r
49\r
50 if (PsndLen <= lines)\r
51 {\r
52 // shrinking algo\r
53 dac_cnt = -PsndLen;\r
54 len=1; pos=0;\r
55 dac_info[225] = 1;\r
56\r
57 for(i=226; i != 225; i++)\r
58 {\r
59 if (i >= lines) i = 0;\r
60 len = 0;\r
61 if(dac_cnt < 0) {\r
62 len=1;\r
63 pos++;\r
64 dac_cnt += lines;\r
65 }\r
66 dac_cnt -= PsndLen;\r
67 dac_info[i] = (pos<<4)|len;\r
68 }\r
69 }\r
70 else\r
71 {\r
72 // stretching\r
73 dac_cnt = PsndLen;\r
74 pos=0;\r
75 for(i = 225; i != 224; i++)\r
76 {\r
77 if (i >= lines) i = 0;\r
78 len=0;\r
79 while(dac_cnt >= 0) {\r
80 dac_cnt -= lines;\r
81 len++;\r
82 }\r
83 if (i == mid) // midpoint\r
84 while(pos+len < PsndLen/2) {\r
85 dac_cnt -= lines;\r
86 len++;\r
87 }\r
88 dac_cnt += PsndLen;\r
89 dac_info[i] = (pos<<4)|len;\r
90 pos+=len;\r
91 }\r
92 // last sample\r
93 for(len = 0, i = pos; i < PsndLen; i++) len++;\r
94 if (PsndLen_exc_add) len++;\r
95 dac_info[224] = (pos<<4)|len;\r
96 }\r
97 mid = (dac_info[lines-1] & 0xfff0) + ((dac_info[lines-1] & 0xf) << 4);\r
98 for (i = lines; i < sizeof(dac_info) / sizeof(dac_info[0]); i++)\r
99 dac_info[i] = mid;\r
100 //for(i=len=0; i < lines; i++) {\r
101 // printf("%03i : %03i : %i\n", i, dac_info[i]>>4, dac_info[i]&0xf);\r
102 // len+=dac_info[i]&0xf;\r
103 //}\r
104 //printf("rate is %i, len %f\n", PsndRate, (double)PsndRate/(Pico.m.pal ? 50.0 : 60.0));\r
105 //printf("len total: %i, last pos: %i\n", len, pos);\r
106 //exit(8);\r
107}\r
108\r
109\r
110PICO_INTERNAL void PsndReset(void)\r
111{\r
112 // PsndRerate calls YM2612Init, which also resets\r
113 PsndRerate(0);\r
114 timers_reset();\r
115}\r
116\r
117\r
118// to be called after changing sound rate or chips\r
119void PsndRerate(int preserve_state)\r
120{\r
121 void *state = NULL;\r
122 int target_fps = Pico.m.pal ? 50 : 60;\r
123\r
124 // not all rates are supported in MCD mode due to mp3 decoder limitations\r
125 if (PicoAHW & PAHW_MCD) {\r
126 if (!(11025-100 <= PsndRate && PsndRate <= 11025+100) &&\r
127 !(22050-100 <= PsndRate && PsndRate <= 22050+100) &&\r
128 !(44100-100 <= PsndRate && PsndRate <= 44100+100))\r
129 PsndRate = 22050;\r
130 PicoOpt |= POPT_EN_STEREO; // force stereo\r
131 }\r
132\r
133 if (preserve_state) {\r
134 state = malloc(0x204);\r
135 if (state == NULL) return;\r
136 ym2612_pack_state();\r
137 memcpy(state, YM2612GetRegs(), 0x204);\r
138 }\r
139 YM2612Init(Pico.m.pal ? OSC_PAL/7 : OSC_NTSC/7, PsndRate);\r
140 if (preserve_state) {\r
141 // feed it back it's own registers, just like after loading state\r
142 memcpy(YM2612GetRegs(), state, 0x204);\r
143 ym2612_unpack_state();\r
144 if ((PicoAHW & PAHW_MCD) && !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))\r
145 cdda_start_play();\r
146 }\r
147\r
148 if (preserve_state) memcpy(state, sn76496_regs, 28*4); // remember old state\r
149 SN76496_init(Pico.m.pal ? OSC_PAL/15 : OSC_NTSC/15, PsndRate);\r
150 if (preserve_state) memcpy(sn76496_regs, state, 28*4); // restore old state\r
151\r
152 if (state)\r
153 free(state);\r
154\r
155 // calculate PsndLen\r
156 PsndLen=PsndRate / target_fps;\r
157 PsndLen_exc_add=((PsndRate - PsndLen*target_fps)<<16) / target_fps;\r
158 PsndLen_exc_cnt=0;\r
159\r
160 // recalculate dac info\r
161 dac_recalculate();\r
162\r
163 if (PicoAHW & PAHW_MCD)\r
164 pcm_set_rate(PsndRate);\r
165\r
166 // clear all buffers\r
167 memset32(PsndBuffer, 0, sizeof(PsndBuffer)/4);\r
168 memset(cdda_out_buffer, 0, sizeof(cdda_out_buffer));\r
169 if (PsndOut)\r
170 PsndClear();\r
171\r
172 // set mixer\r
173 PsndMix_32_to_16l = (PicoOpt & POPT_EN_STEREO) ? mix_32_to_16l_stereo : mix_32_to_16_mono;\r
174\r
175 if (PicoAHW & PAHW_PICO)\r
176 PicoReratePico();\r
177}\r
178\r
179\r
180PICO_INTERNAL void PsndDoDAC(int line_to)\r
181{\r
182 int pos, pos1, len;\r
183 int dout = ym2612.dacout;\r
184 int line_from = PsndDacLine;\r
185\r
186 if (line_to >= 312)\r
187 line_to = 311;\r
188\r
189 PsndDacLine = line_to + 1;\r
190\r
191 pos =dac_info[line_from]>>4;\r
192 pos1=dac_info[line_to];\r
193 len = ((pos1>>4)-pos) + (pos1&0xf);\r
194 if (!len) return;\r
195\r
196 if (PicoOpt & POPT_EN_STEREO) {\r
197 short *d = PsndOut + pos*2;\r
198 for (; len > 0; len--, d+=2) *d = dout;\r
199 } else {\r
200 short *d = PsndOut + pos;\r
201 for (; len > 0; len--, d++) *d = dout;\r
202 }\r
203\r
204#if 0\r
205 if (do_pcm) {\r
206 int *d = PsndBuffer;\r
207 d += (PicoOpt&8) ? pos*2 : pos;\r
208 pcm_update(d, len, 1);\r
209 }\r
210#endif\r
211}\r
212\r
213// cdda\r
214static pm_file *cdda_stream = NULL;\r
215\r
216static void cdda_raw_update(int *buffer, int length)\r
217{\r
218 int ret, cdda_bytes, mult = 1;\r
219 if (cdda_stream == NULL)\r
220 return;\r
221\r
222 cdda_bytes = length*4;\r
223 if (PsndRate <= 22050 + 100) mult = 2;\r
224 if (PsndRate < 22050 - 100) mult = 4;\r
225 cdda_bytes *= mult;\r
226\r
227 ret = pm_read(cdda_out_buffer, cdda_bytes, cdda_stream);\r
228 if (ret < cdda_bytes) {\r
229 memset((char *)cdda_out_buffer + ret, 0, cdda_bytes - ret);\r
230 cdda_stream = NULL;\r
231 return;\r
232 }\r
233\r
234 // now mix\r
235 switch (mult) {\r
236 case 1: mix_16h_to_32(buffer, cdda_out_buffer, length*2); break;\r
237 case 2: mix_16h_to_32_s1(buffer, cdda_out_buffer, length*2); break;\r
238 case 4: mix_16h_to_32_s2(buffer, cdda_out_buffer, length*2); break;\r
239 }\r
240}\r
241\r
242PICO_INTERNAL void cdda_start_play(void)\r
243{\r
244 int lba_offset, index, lba_length, i;\r
245\r
246 elprintf(EL_STATUS, "cdda play track #%i", Pico_mcd->scd.Cur_Track);\r
247\r
248 index = Pico_mcd->scd.Cur_Track - 1;\r
249\r
250 lba_offset = Pico_mcd->scd.Cur_LBA - Track_to_LBA(index + 1);\r
251 if (lba_offset < 0) lba_offset = 0;\r
252 lba_offset += Pico_mcd->TOC.Tracks[index].Offset;\r
253\r
254 // find the actual file for this track\r
255 for (i = index; i > 0; i--)\r
256 if (Pico_mcd->TOC.Tracks[i].F != NULL) break;\r
257\r
258 if (Pico_mcd->TOC.Tracks[i].F == NULL) {\r
259 elprintf(EL_STATUS|EL_ANOMALY, "no track?!");\r
260 return;\r
261 }\r
262\r
263 if (Pico_mcd->TOC.Tracks[i].ftype == TYPE_MP3)\r
264 {\r
265 int pos1024 = 0;\r
266\r
267 lba_length = Pico_mcd->TOC.Tracks[i].Length;\r
268 for (i++; i < Pico_mcd->TOC.Last_Track; i++) {\r
269 if (Pico_mcd->TOC.Tracks[i].F != NULL) break;\r
270 lba_length += Pico_mcd->TOC.Tracks[i].Length;\r
271 }\r
272\r
273 if (lba_offset)\r
274 pos1024 = lba_offset * 1024 / lba_length;\r
275\r
276 mp3_start_play(Pico_mcd->TOC.Tracks[index].F, pos1024);\r
277 return;\r
278 }\r
279\r
280 cdda_stream = Pico_mcd->TOC.Tracks[i].F;\r
281 PicoCDBufferFlush(); // buffering relies on fp not being touched\r
282 pm_seek(cdda_stream, lba_offset * 2352, SEEK_SET);\r
283 if (Pico_mcd->TOC.Tracks[i].ftype == TYPE_WAV)\r
284 {\r
285 // skip headers, assume it's 44kHz stereo uncompressed\r
286 pm_seek(cdda_stream, 44, SEEK_CUR);\r
287 }\r
288}\r
289\r
290\r
291PICO_INTERNAL void PsndClear(void)\r
292{\r
293 int len = PsndLen;\r
294 if (PsndLen_exc_add) len++;\r
295 if (PicoOpt & POPT_EN_STEREO)\r
296 memset32((int *) PsndOut, 0, len); // assume PsndOut to be aligned\r
297 else {\r
298 short *out = PsndOut;\r
299 if ((long)out & 2) { *out++ = 0; len--; }\r
300 memset32((int *) out, 0, len/2);\r
301 if (len & 1) out[len-1] = 0;\r
302 }\r
303}\r
304\r
305\r
306static int PsndRender(int offset, int length)\r
307{\r
308 int buf32_updated = 0;\r
309 int *buf32 = PsndBuffer+offset;\r
310 int stereo = (PicoOpt & 8) >> 3;\r
311 // emulating CD && PCM option enabled && PCM chip on && have enabled channels\r
312 int do_pcm = (PicoAHW & PAHW_MCD) && (PicoOpt&POPT_EN_MCD_PCM) &&\r
313 (Pico_mcd->pcm.control & 0x80) && Pico_mcd->pcm.enabled;\r
314 offset <<= stereo;\r
315\r
316 pprof_start(sound);\r
317\r
318#if !SIMPLE_WRITE_SOUND\r
319 if (offset == 0) { // should happen once per frame\r
320 // compensate for float part of PsndLen\r
321 PsndLen_exc_cnt += PsndLen_exc_add;\r
322 if (PsndLen_exc_cnt >= 0x10000) {\r
323 PsndLen_exc_cnt -= 0x10000;\r
324 length++;\r
325 }\r
326 }\r
327#endif\r
328\r
329 // PSG\r
330 if (PicoOpt & POPT_EN_PSG)\r
331 SN76496Update(PsndOut+offset, length, stereo);\r
332\r
333 if (PicoAHW & PAHW_PICO) {\r
334 PicoPicoPCMUpdate(PsndOut+offset, length, stereo);\r
335 return length;\r
336 }\r
337\r
338 // Add in the stereo FM buffer\r
339 if (PicoOpt & POPT_EN_FM) {\r
340 buf32_updated = YM2612UpdateOne(buf32, length, stereo, 1);\r
341 } else\r
342 memset32(buf32, 0, length<<stereo);\r
343\r
344//printf("active_chs: %02x\n", buf32_updated);\r
345 (void)buf32_updated;\r
346\r
347 // CD: PCM sound\r
348 if (do_pcm) {\r
349 pcm_update(buf32, length, stereo);\r
350 //buf32_updated = 1;\r
351 }\r
352\r
353 // CD: CDDA audio\r
354 // CD mode, cdda enabled, not data track, CDC is reading\r
355 if ((PicoAHW & PAHW_MCD) && (PicoOpt & POPT_EN_MCD_CDDA) &&\r
356 !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1))\r
357 {\r
358 // note: only 44, 22 and 11 kHz supported, with forced stereo\r
359 int index = Pico_mcd->scd.Cur_Track - 1;\r
360\r
361 if (Pico_mcd->TOC.Tracks[index].ftype == TYPE_MP3)\r
362 mp3_update(buf32, length, stereo);\r
363 else\r
364 cdda_raw_update(buf32, length);\r
365 }\r
366\r
367 if ((PicoAHW & PAHW_32X) && (PicoOpt & POPT_EN_PWM))\r
368 p32x_pwm_update(buf32, length, stereo);\r
369\r
370 // convert + limit to normal 16bit output\r
371 PsndMix_32_to_16l(PsndOut+offset, buf32, length);\r
372\r
373 pprof_end(sound);\r
374\r
375 return length;\r
376}\r
377\r
378// to be called on 224 or line_sample scanlines only\r
379PICO_INTERNAL void PsndGetSamples(int y)\r
380{\r
381#if SIMPLE_WRITE_SOUND\r
382 if (y != 224) return;\r
383 PsndRender(0, PsndLen);\r
384 if (PicoWriteSound)\r
385 PicoWriteSound(PsndLen * ((PicoOpt & POPT_EN_STEREO) ? 4 : 2));\r
386 PsndClear();\r
387#else\r
388 static int curr_pos = 0;\r
389\r
390 if (y == 224)\r
391 {\r
392 if (emustatus & 2)\r
393 curr_pos += PsndRender(curr_pos, PsndLen-PsndLen/2);\r
394 else curr_pos = PsndRender(0, PsndLen);\r
395 if (emustatus & 1)\r
396 emustatus |= 2;\r
397 else emustatus &= ~2;\r
398 if (PicoWriteSound)\r
399 PicoWriteSound(curr_pos * ((PicoOpt & POPT_EN_STEREO) ? 4 : 2));\r
400 // clear sound buffer\r
401 PsndClear();\r
402 }\r
403 else if (emustatus & 3) {\r
404 emustatus|= 2;\r
405 emustatus&=~1;\r
406 curr_pos = PsndRender(0, PsndLen/2);\r
407 }\r
408#endif\r
409}\r
410\r
411PICO_INTERNAL void PsndGetSamplesMS(void)\r
412{\r
413 int stereo = (PicoOpt & 8) >> 3;\r
414 int length = PsndLen;\r
415\r
416#if !SIMPLE_WRITE_SOUND\r
417 // compensate for float part of PsndLen\r
418 PsndLen_exc_cnt += PsndLen_exc_add;\r
419 if (PsndLen_exc_cnt >= 0x10000) {\r
420 PsndLen_exc_cnt -= 0x10000;\r
421 length++;\r
422 }\r
423#endif\r
424\r
425 // PSG\r
426 if (PicoOpt & POPT_EN_PSG)\r
427 SN76496Update(PsndOut, length, stereo);\r
428\r
429 // upmix to "stereo" if needed\r
430 if (stereo) {\r
431 int i, *p;\r
432 for (i = length, p = (void *)PsndOut; i > 0; i--, p++)\r
433 *p |= *p << 16;\r
434 }\r
435\r
436 if (PicoWriteSound != NULL)\r
437 PicoWriteSound(length * ((PicoOpt & POPT_EN_STEREO) ? 4 : 2));\r
438 PsndClear();\r
439}\r
440\r
fast MegaDrive/MegaCD/32X emulator