cff531af |
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 |
cc68a136 |
9 | \r |
10 | #include <string.h>\r |
cc68a136 |
11 | #include "ym2612.h"\r |
12 | #include "sn76496.h"\r |
efcba75f |
13 | #include "../pico_int.h"\r |
e71fae1f |
14 | #include "../cd/cue.h"\r |
4f265db7 |
15 | #include "mix.h"\r |
cc68a136 |
16 | \r |
4a32f01f |
17 | void (*PsndMix_32_to_16l)(short *dest, int *src, int count) = mix_32_to_16l_stereo;\r |
18 | \r |
4f265db7 |
19 | // master int buffer to mix to\r |
02da059d |
20 | static int PsndBuffer[2*(44100+100)/50];\r |
cc68a136 |
21 | \r |
5d638db0 |
22 | // dac, psg\r |
4f2cdbf5 |
23 | static unsigned short dac_info[312+4]; // pos in sample buffer\r |
cc68a136 |
24 | \r |
c9e1affc |
25 | // cdda output buffer\r |
26 | short cdda_out_buffer[2*1152];\r |
27 | \r |
cc68a136 |
28 | // sn76496\r |
29 | extern int *sn76496_regs;\r |
30 | \r |
31 | \r |
eff55556 |
32 | static void dac_recalculate(void)\r |
cc68a136 |
33 | {\r |
6311a3ba |
34 | int lines = Pico.m.pal ? 313 : 262;\r |
35 | int mid = Pico.m.pal ? 68 : 93;\r |
36 | int i, dac_cnt, pos, len;\r |
cc68a136 |
37 | \r |
6311a3ba |
38 | if (Pico.snd.len <= lines)\r |
43e6eaad |
39 | {\r |
cc68a136 |
40 | // shrinking algo\r |
6311a3ba |
41 | dac_cnt = -Pico.snd.len;\r |
cc68a136 |
42 | len=1; pos=0;\r |
43 | dac_info[225] = 1;\r |
44 | \r |
43e6eaad |
45 | for(i=226; i != 225; i++)\r |
46 | {\r |
cc68a136 |
47 | if (i >= lines) i = 0;\r |
cc68a136 |
48 | if(dac_cnt < 0) {\r |
cc68a136 |
49 | pos++;\r |
50 | dac_cnt += lines;\r |
51 | }\r |
6311a3ba |
52 | dac_cnt -= Pico.snd.len;\r |
4f2cdbf5 |
53 | dac_info[i] = pos;\r |
cc68a136 |
54 | }\r |
43e6eaad |
55 | }\r |
56 | else\r |
57 | {\r |
cc68a136 |
58 | // stretching\r |
6311a3ba |
59 | dac_cnt = Pico.snd.len;\r |
cc68a136 |
60 | pos=0;\r |
43e6eaad |
61 | for(i = 225; i != 224; i++)\r |
62 | {\r |
cc68a136 |
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 |
4f265db7 |
69 | if (i == mid) // midpoint\r |
6311a3ba |
70 | while(pos+len < Pico.snd.len/2) {\r |
cc68a136 |
71 | dac_cnt -= lines;\r |
72 | len++;\r |
73 | }\r |
6311a3ba |
74 | dac_cnt += Pico.snd.len;\r |
4f2cdbf5 |
75 | pos += len;\r |
76 | dac_info[i] = pos;\r |
cc68a136 |
77 | }\r |
cc68a136 |
78 | }\r |
4b9c5888 |
79 | for (i = lines; i < sizeof(dac_info) / sizeof(dac_info[0]); i++)\r |
4f2cdbf5 |
80 | dac_info[i] = dac_info[0];\r |
cc68a136 |
81 | }\r |
82 | \r |
83 | \r |
9d917eea |
84 | PICO_INTERNAL void PsndReset(void)\r |
cc68a136 |
85 | {\r |
af37bca8 |
86 | // PsndRerate calls YM2612Init, which also resets\r |
9d917eea |
87 | PsndRerate(0);\r |
af37bca8 |
88 | timers_reset();\r |
cc68a136 |
89 | }\r |
90 | \r |
91 | \r |
92 | // to be called after changing sound rate or chips\r |
9d917eea |
93 | void PsndRerate(int preserve_state)\r |
cc68a136 |
94 | {\r |
5f8c85be |
95 | void *state = NULL;\r |
7a93adeb |
96 | int target_fps = Pico.m.pal ? 50 : 60;\r |
cc68a136 |
97 | \r |
7a93adeb |
98 | if (preserve_state) {\r |
d8afe7b8 |
99 | state = malloc(0x204);\r |
5f8c85be |
100 | if (state == NULL) return;\r |
d8afe7b8 |
101 | ym2612_pack_state();\r |
102 | memcpy(state, YM2612GetRegs(), 0x204);\r |
7a93adeb |
103 | }\r |
6311a3ba |
104 | YM2612Init(Pico.m.pal ? OSC_PAL/7 : OSC_NTSC/7, PicoIn.sndRate);\r |
7a93adeb |
105 | if (preserve_state) {\r |
106 | // feed it back it's own registers, just like after loading state\r |
d8afe7b8 |
107 | memcpy(YM2612GetRegs(), state, 0x204);\r |
453d2a6e |
108 | ym2612_unpack_state();\r |
7a93adeb |
109 | }\r |
cc68a136 |
110 | \r |
7a93adeb |
111 | if (preserve_state) memcpy(state, sn76496_regs, 28*4); // remember old state\r |
6311a3ba |
112 | SN76496_init(Pico.m.pal ? OSC_PAL/15 : OSC_NTSC/15, PicoIn.sndRate);\r |
7a93adeb |
113 | if (preserve_state) memcpy(sn76496_regs, state, 28*4); // restore old state\r |
cc68a136 |
114 | \r |
5f8c85be |
115 | if (state)\r |
116 | free(state);\r |
117 | \r |
6311a3ba |
118 | // calculate Pico.snd.len\r |
119 | Pico.snd.len = PicoIn.sndRate / target_fps;\r |
120 | Pico.snd.len_e_add = ((PicoIn.sndRate - Pico.snd.len * target_fps) << 16) / target_fps;\r |
121 | Pico.snd.len_e_cnt = 0;\r |
cc68a136 |
122 | \r |
123 | // recalculate dac info\r |
124 | dac_recalculate();\r |
4f265db7 |
125 | \r |
7a93adeb |
126 | // clear all buffers\r |
127 | memset32(PsndBuffer, 0, sizeof(PsndBuffer)/4);\r |
c9e1affc |
128 | memset(cdda_out_buffer, 0, sizeof(cdda_out_buffer));\r |
6311a3ba |
129 | if (PicoIn.sndOut)\r |
9d917eea |
130 | PsndClear();\r |
4a32f01f |
131 | \r |
132 | // set mixer\r |
93f9619e |
133 | PsndMix_32_to_16l = (PicoIn.opt & POPT_EN_STEREO) ? mix_32_to_16l_stereo : mix_32_to_16_mono;\r |
ed367a3f |
134 | \r |
93f9619e |
135 | if (PicoIn.AHW & PAHW_PICO)\r |
ed367a3f |
136 | PicoReratePico();\r |
cc68a136 |
137 | }\r |
138 | \r |
139 | \r |
4f2cdbf5 |
140 | PICO_INTERNAL void PsndStartFrame(void)\r |
141 | {\r |
6311a3ba |
142 | // compensate for float part of Pico.snd.len\r |
143 | Pico.snd.len_use = Pico.snd.len;\r |
144 | Pico.snd.len_e_cnt += Pico.snd.len_e_add;\r |
145 | if (Pico.snd.len_e_cnt >= 0x10000) {\r |
146 | Pico.snd.len_e_cnt -= 0x10000;\r |
147 | Pico.snd.len_use++;\r |
4f2cdbf5 |
148 | }\r |
149 | \r |
6311a3ba |
150 | Pico.snd.dac_line = Pico.snd.psg_line = 0;\r |
93f9619e |
151 | Pico.m.status &= ~1;\r |
6311a3ba |
152 | dac_info[224] = Pico.snd.len_use;\r |
4f2cdbf5 |
153 | }\r |
154 | \r |
4b9c5888 |
155 | PICO_INTERNAL void PsndDoDAC(int line_to)\r |
cc68a136 |
156 | {\r |
4b9c5888 |
157 | int pos, pos1, len;\r |
158 | int dout = ym2612.dacout;\r |
6311a3ba |
159 | int line_from = Pico.snd.dac_line;\r |
4f265db7 |
160 | \r |
e42a47e2 |
161 | if (line_to >= 313)\r |
162 | line_to = 312;\r |
9b5713af |
163 | \r |
4f2cdbf5 |
164 | pos = dac_info[line_from];\r |
165 | pos1 = dac_info[line_to + 1];\r |
166 | len = pos1 - pos;\r |
167 | if (len <= 0)\r |
168 | return;\r |
169 | \r |
6311a3ba |
170 | Pico.snd.dac_line = line_to + 1;\r |
4f265db7 |
171 | \r |
6311a3ba |
172 | if (!PicoIn.sndOut)\r |
4f2cdbf5 |
173 | return;\r |
4f265db7 |
174 | \r |
93f9619e |
175 | if (PicoIn.opt & POPT_EN_STEREO) {\r |
6311a3ba |
176 | short *d = PicoIn.sndOut + pos*2;\r |
5d638db0 |
177 | for (; len > 0; len--, d+=2) *d += dout;\r |
4b9c5888 |
178 | } else {\r |
6311a3ba |
179 | short *d = PicoIn.sndOut + pos;\r |
5d638db0 |
180 | for (; len > 0; len--, d++) *d += dout;\r |
cc68a136 |
181 | }\r |
4f265db7 |
182 | }\r |
cc68a136 |
183 | \r |
5d638db0 |
184 | PICO_INTERNAL void PsndDoPSG(int line_to)\r |
185 | {\r |
6311a3ba |
186 | int line_from = Pico.snd.psg_line;\r |
5d638db0 |
187 | int pos, pos1, len;\r |
188 | int stereo = 0;\r |
189 | \r |
e42a47e2 |
190 | if (line_to >= 313)\r |
191 | line_to = 312;\r |
5d638db0 |
192 | \r |
193 | pos = dac_info[line_from];\r |
194 | pos1 = dac_info[line_to + 1];\r |
195 | len = pos1 - pos;\r |
196 | //elprintf(EL_STATUS, "%3d %3d %3d %3d %3d",\r |
197 | // pos, pos1, len, line_from, line_to);\r |
198 | if (len <= 0)\r |
199 | return;\r |
200 | \r |
6311a3ba |
201 | Pico.snd.psg_line = line_to + 1;\r |
5d638db0 |
202 | \r |
6311a3ba |
203 | if (!PicoIn.sndOut || !(PicoIn.opt & POPT_EN_PSG))\r |
5d638db0 |
204 | return;\r |
205 | \r |
93f9619e |
206 | if (PicoIn.opt & POPT_EN_STEREO) {\r |
5d638db0 |
207 | stereo = 1;\r |
208 | pos <<= 1;\r |
209 | }\r |
6311a3ba |
210 | SN76496Update(PicoIn.sndOut + pos, len, stereo);\r |
5d638db0 |
211 | }\r |
212 | \r |
c9e1affc |
213 | // cdda\r |
c9e1affc |
214 | static void cdda_raw_update(int *buffer, int length)\r |
215 | {\r |
02da059d |
216 | int ret, cdda_bytes, mult = 1;\r |
c9e1affc |
217 | \r |
218 | cdda_bytes = length*4;\r |
6311a3ba |
219 | if (PicoIn.sndRate <= 22050 + 100) mult = 2;\r |
220 | if (PicoIn.sndRate < 22050 - 100) mult = 4;\r |
02da059d |
221 | cdda_bytes *= mult;\r |
c9e1affc |
222 | \r |
274fcc35 |
223 | ret = pm_read(cdda_out_buffer, cdda_bytes, Pico_mcd->cdda_stream);\r |
c9e1affc |
224 | if (ret < cdda_bytes) {\r |
225 | memset((char *)cdda_out_buffer + ret, 0, cdda_bytes - ret);\r |
274fcc35 |
226 | Pico_mcd->cdda_stream = NULL;\r |
c9e1affc |
227 | return;\r |
228 | }\r |
229 | \r |
230 | // now mix\r |
02da059d |
231 | switch (mult) {\r |
232 | case 1: mix_16h_to_32(buffer, cdda_out_buffer, length*2); break;\r |
233 | case 2: mix_16h_to_32_s1(buffer, cdda_out_buffer, length*2); break;\r |
234 | case 4: mix_16h_to_32_s2(buffer, cdda_out_buffer, length*2); break;\r |
c9e1affc |
235 | }\r |
236 | }\r |
237 | \r |
274fcc35 |
238 | void cdda_start_play(int lba_base, int lba_offset, int lb_len)\r |
c9e1affc |
239 | {\r |
274fcc35 |
240 | if (Pico_mcd->cdda_type == CT_MP3)\r |
c9e1affc |
241 | {\r |
242 | int pos1024 = 0;\r |
243 | \r |
c9e1affc |
244 | if (lba_offset)\r |
274fcc35 |
245 | pos1024 = lba_offset * 1024 / lb_len;\r |
c9e1affc |
246 | \r |
274fcc35 |
247 | mp3_start_play(Pico_mcd->cdda_stream, pos1024);\r |
c9e1affc |
248 | return;\r |
249 | }\r |
250 | \r |
274fcc35 |
251 | pm_seek(Pico_mcd->cdda_stream, (lba_base + lba_offset) * 2352, SEEK_SET);\r |
252 | if (Pico_mcd->cdda_type == CT_WAV)\r |
0bccafeb |
253 | {\r |
254 | // skip headers, assume it's 44kHz stereo uncompressed\r |
274fcc35 |
255 | pm_seek(Pico_mcd->cdda_stream, 44, SEEK_CUR);\r |
0bccafeb |
256 | }\r |
c9e1affc |
257 | }\r |
258 | \r |
cc68a136 |
259 | \r |
9d917eea |
260 | PICO_INTERNAL void PsndClear(void)\r |
4f265db7 |
261 | {\r |
6311a3ba |
262 | int len = Pico.snd.len;\r |
263 | if (Pico.snd.len_e_add) len++;\r |
93f9619e |
264 | if (PicoIn.opt & POPT_EN_STEREO)\r |
6311a3ba |
265 | memset32((int *) PicoIn.sndOut, 0, len); // assume PicoIn.sndOut to be aligned\r |
88b3d7c1 |
266 | else {\r |
6311a3ba |
267 | short *out = PicoIn.sndOut;\r |
48c9e01b |
268 | if ((uintptr_t)out & 2) { *out++ = 0; len--; }\r |
88b3d7c1 |
269 | memset32((int *) out, 0, len/2);\r |
270 | if (len & 1) out[len-1] = 0;\r |
271 | }\r |
cc68a136 |
272 | }\r |
273 | \r |
274 | \r |
7b3f44c6 |
275 | static int PsndRender(int offset, int length)\r |
cc68a136 |
276 | {\r |
85f8e929 |
277 | int buf32_updated = 0;\r |
4f265db7 |
278 | int *buf32 = PsndBuffer+offset;\r |
93f9619e |
279 | int stereo = (PicoIn.opt & 8) >> 3;\r |
33be04ca |
280 | \r |
cc68a136 |
281 | offset <<= stereo;\r |
282 | \r |
f6c49d38 |
283 | pprof_start(sound);\r |
284 | \r |
93f9619e |
285 | if (PicoIn.AHW & PAHW_PICO) {\r |
6311a3ba |
286 | PicoPicoPCMUpdate(PicoIn.sndOut+offset, length, stereo);\r |
ef4eb506 |
287 | return length;\r |
288 | }\r |
289 | \r |
cc68a136 |
290 | // Add in the stereo FM buffer\r |
93f9619e |
291 | if (PicoIn.opt & POPT_EN_FM) {\r |
85f8e929 |
292 | buf32_updated = YM2612UpdateOne(buf32, length, stereo, 1);\r |
3ec29f01 |
293 | } else\r |
fa1e5e29 |
294 | memset32(buf32, 0, length<<stereo);\r |
85f8e929 |
295 | \r |
296 | //printf("active_chs: %02x\n", buf32_updated);\r |
e743be20 |
297 | (void)buf32_updated;\r |
4f265db7 |
298 | \r |
7a93adeb |
299 | // CD: PCM sound\r |
93f9619e |
300 | if (PicoIn.AHW & PAHW_MCD) {\r |
33be04ca |
301 | pcd_pcm_update(buf32, length, stereo);\r |
85f8e929 |
302 | //buf32_updated = 1;\r |
303 | }\r |
4f265db7 |
304 | \r |
7a93adeb |
305 | // CD: CDDA audio\r |
da42200b |
306 | // CD mode, cdda enabled, not data track, CDC is reading\r |
93f9619e |
307 | if ((PicoIn.AHW & PAHW_MCD) && (PicoIn.opt & POPT_EN_MCD_CDDA)\r |
274fcc35 |
308 | && Pico_mcd->cdda_stream != NULL\r |
309 | && !(Pico_mcd->s68k_regs[0x36] & 1))\r |
c9e1affc |
310 | {\r |
311 | // note: only 44, 22 and 11 kHz supported, with forced stereo\r |
274fcc35 |
312 | if (Pico_mcd->cdda_type == CT_MP3)\r |
c9e1affc |
313 | mp3_update(buf32, length, stereo);\r |
314 | else\r |
315 | cdda_raw_update(buf32, length);\r |
316 | }\r |
4f265db7 |
317 | \r |
93f9619e |
318 | if ((PicoIn.AHW & PAHW_32X) && (PicoIn.opt & POPT_EN_PWM))\r |
db1d3564 |
319 | p32x_pwm_update(buf32, length, stereo);\r |
320 | \r |
4f265db7 |
321 | // convert + limit to normal 16bit output\r |
6311a3ba |
322 | PsndMix_32_to_16l(PicoIn.sndOut+offset, buf32, length);\r |
cc68a136 |
323 | \r |
f6c49d38 |
324 | pprof_end(sound);\r |
325 | \r |
7a93adeb |
326 | return length;\r |
cc68a136 |
327 | }\r |
328 | \r |
7b3f44c6 |
329 | // to be called on 224 or line_sample scanlines only\r |
330 | PICO_INTERNAL void PsndGetSamples(int y)\r |
331 | {\r |
7b3f44c6 |
332 | static int curr_pos = 0;\r |
333 | \r |
6311a3ba |
334 | if (ym2612.dacen && Pico.snd.dac_line < y)\r |
4f2cdbf5 |
335 | PsndDoDAC(y - 1);\r |
5d638db0 |
336 | PsndDoPSG(y - 1);\r |
4f2cdbf5 |
337 | \r |
7b3f44c6 |
338 | if (y == 224)\r |
339 | {\r |
93f9619e |
340 | if (Pico.m.status & 2)\r |
6311a3ba |
341 | curr_pos += PsndRender(curr_pos, Pico.snd.len-Pico.snd.len/2);\r |
342 | else curr_pos = PsndRender(0, Pico.snd.len_use);\r |
93f9619e |
343 | if (Pico.m.status & 1)\r |
344 | Pico.m.status |= 2;\r |
345 | else Pico.m.status &= ~2;\r |
6311a3ba |
346 | if (PicoIn.writeSound)\r |
347 | PicoIn.writeSound(curr_pos * ((PicoIn.opt & POPT_EN_STEREO) ? 4 : 2));\r |
7b3f44c6 |
348 | // clear sound buffer\r |
349 | PsndClear();\r |
6311a3ba |
350 | Pico.snd.dac_line = 224;\r |
4f2cdbf5 |
351 | dac_info[224] = 0;\r |
7b3f44c6 |
352 | }\r |
93f9619e |
353 | else if (Pico.m.status & 3) {\r |
354 | Pico.m.status |= 2;\r |
355 | Pico.m.status &= ~1;\r |
6311a3ba |
356 | curr_pos = PsndRender(0, Pico.snd.len/2);\r |
7b3f44c6 |
357 | }\r |
7b3f44c6 |
358 | }\r |
359 | \r |
2ec9bec5 |
360 | PICO_INTERNAL void PsndGetSamplesMS(void)\r |
361 | {\r |
6311a3ba |
362 | int length = Pico.snd.len_use;\r |
2ec9bec5 |
363 | \r |
075672bf |
364 | PsndDoPSG(223);\r |
2ec9bec5 |
365 | \r |
19954be1 |
366 | // upmix to "stereo" if needed\r |
075672bf |
367 | if (PicoIn.opt & POPT_EN_STEREO) {\r |
8a19f430 |
368 | int i, *p;\r |
6311a3ba |
369 | for (i = length, p = (void *)PicoIn.sndOut; i > 0; i--, p++)\r |
19954be1 |
370 | *p |= *p << 16;\r |
371 | }\r |
2ec9bec5 |
372 | \r |
6311a3ba |
373 | if (PicoIn.writeSound != NULL)\r |
374 | PicoIn.writeSound(length * ((PicoIn.opt & POPT_EN_STEREO) ? 4 : 2));\r |
2ec9bec5 |
375 | PsndClear();\r |
075672bf |
376 | \r |
377 | dac_info[224] = 0;\r |
2ec9bec5 |
378 | }\r |
379 | \r |
4f2cdbf5 |
380 | // vim:shiftwidth=2:ts=2:expandtab\r |