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some audio problems fixed, missing files added
[libpicofe.git] / gp2x / 940ctl_ym2612.c
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1#include <stdio.h>\r
2#include <stdlib.h>\r
3#include <string.h>\r
4#include <unistd.h>\r
5#include <sys/mman.h>\r
6#include <sys/ioctl.h>\r
7#include <fcntl.h>\r
8#include <errno.h>\r
9\r
10#include "code940/940shared.h"\r
11#include "gp2x.h"\r
12#include "emu.h"\r
13#include "menu.h"\r
14#include "asmutils.h"\r
15#include "mp3.h"\r
16#include "../../Pico/PicoInt.h"\r
17#include "../../Pico/sound/mix.h"\r
18\r
19/* we will need some gp2x internals here */\r
20extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */\r
21extern volatile unsigned long *gp2x_memregl;\r
22\r
23static unsigned char *shared_mem = 0;\r
24static _940_data_t *shared_data = 0;\r
25_940_ctl_t *shared_ctl = 0;\r
26unsigned char *mp3_mem = 0;\r
27\r
28#define MP3_SIZE_MAX (0x1000000 - 4*640*480)\r
29\r
30int crashed_940 = 0;\r
31\r
32static FILE *loaded_mp3 = 0;\r
33\r
34/***********************************************************/\r
35\r
36#define MAXOUT (+32767)\r
37#define MINOUT (-32768)\r
38\r
39/* limitter */\r
40#define Limit(val, max,min) { \\r
41 if ( val > max ) val = max; \\r
42 else if ( val < min ) val = min; \\r
43}\r
44\r
45/* these will be managed locally on our side */\r
46extern int *ym2612_dacen;\r
47extern INT32 *ym2612_dacout;\r
48extern void *ym2612_regs;\r
49\r
50static UINT8 *REGS = 0; /* we will also keep local copy of regs for savestates and such */\r
51static INT32 addr_A1; /* address line A1 */\r
52static int dacen;\r
53static INT32 dacout;\r
54static UINT8 ST_address; /* address register */\r
55static UINT8 ST_status; /* status flag */\r
56static UINT8 ST_mode; /* mode CSM / 3SLOT */\r
57static int ST_TA; /* timer a */\r
58static int ST_TAC; /* timer a maxval */\r
59static int ST_TAT; /* timer a ticker */\r
60static UINT8 ST_TB; /* timer b */\r
61static int ST_TBC; /* timer b maxval */\r
62static int ST_TBT; /* timer b ticker */\r
63\r
64static int writebuff_ptr = 0;\r
65\r
66\r
67/* OPN Mode Register Write */\r
68static void set_timers( int v )\r
69{\r
70 /* b7 = CSM MODE */\r
71 /* b6 = 3 slot mode */\r
72 /* b5 = reset b */\r
73 /* b4 = reset a */\r
74 /* b3 = timer enable b */\r
75 /* b2 = timer enable a */\r
76 /* b1 = load b */\r
77 /* b0 = load a */\r
78 ST_mode = v;\r
79\r
80 /* reset Timer b flag */\r
81 if( v & 0x20 )\r
82 ST_status &= ~2;\r
83\r
84 /* reset Timer a flag */\r
85 if( v & 0x10 )\r
86 ST_status &= ~1;\r
87}\r
88\r
89/* YM2612 write */\r
90/* a = address */\r
91/* v = value */\r
92/* returns 1 if sample affecting state changed */\r
93int YM2612Write_940(unsigned int a, unsigned int v)\r
94{\r
95 int addr; //, ret=1;\r
96\r
97 v &= 0xff; /* adjust to 8 bit bus */\r
98 a &= 3;\r
99\r
100 switch( a ) {\r
101 case 0: /* address port 0 */\r
102 ST_address = v;\r
103 addr_A1 = 0;\r
104 //ret=0;\r
105 break;\r
106\r
107 case 1: /* data port 0 */\r
108 if (addr_A1 != 0) {\r
109 return 0; /* verified on real YM2608 */\r
110 }\r
111\r
112 addr = ST_address;\r
113 REGS[addr] = v;\r
114\r
115 switch( addr & 0xf0 )\r
116 {\r
117 case 0x20: /* 0x20-0x2f Mode */\r
118 switch( addr )\r
119 {\r
120 case 0x24: { // timer A High 8\r
121 int TAnew = (ST_TA & 0x03)|(((int)v)<<2);\r
122 if(ST_TA != TAnew) {\r
123 // we should reset ticker only if new value is written. Outrun requires this.\r
124 ST_TA = TAnew;\r
125 ST_TAC = (1024-TAnew)*18;\r
126 ST_TAT = 0;\r
127 }\r
128 return 0;\r
129 }\r
130 case 0x25: { // timer A Low 2\r
131 int TAnew = (ST_TA & 0x3fc)|(v&3);\r
132 if(ST_TA != TAnew) {\r
133 ST_TA = TAnew;\r
134 ST_TAC = (1024-TAnew)*18;\r
135 ST_TAT = 0;\r
136 }\r
137 return 0;\r
138 }\r
139 case 0x26: // timer B\r
140 if(ST_TB != v) {\r
141 ST_TB = v;\r
142 ST_TBC = (256-v)<<4;\r
143 ST_TBC *= 18;\r
144 ST_TBT = 0;\r
145 }\r
146 return 0;\r
147 case 0x27: /* mode, timer control */\r
148 set_timers( v );\r
149 break; // other side needs ST.mode for 3slot mode\r
150 case 0x2a: /* DAC data (YM2612) */\r
151 dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */\r
152 return 0;\r
153 case 0x2b: /* DAC Sel (YM2612) */\r
154 /* b7 = dac enable */\r
155 dacen = v & 0x80;\r
156 break; // other side has to know this\r
157 default:\r
158 break;\r
159 }\r
160 break;\r
161 }\r
162 break;\r
163\r
164 case 2: /* address port 1 */\r
165 ST_address = v;\r
166 addr_A1 = 1;\r
167 //ret=0;\r
168 break;\r
169\r
170 case 3: /* data port 1 */\r
171 if (addr_A1 != 1) {\r
172 return 0; /* verified on real YM2608 */\r
173 }\r
174\r
175 addr = ST_address | 0x100;\r
176 REGS[addr] = v;\r
177 break;\r
178 }\r
179\r
180 if(currentConfig.EmuOpt & 4) {\r
181 /* queue this write for 940 */\r
182 if (writebuff_ptr < 2047) {\r
183 if (shared_ctl->writebuffsel == 1) {\r
184 shared_ctl->writebuff0[writebuff_ptr++] = (a<<8)|v;\r
185 } else {\r
186 shared_ctl->writebuff1[writebuff_ptr++] = (a<<8)|v;\r
187 }\r
188 } else {\r
189 printf("warning: writebuff_ptr > 2047\n");\r
190 }\r
191 }\r
192\r
193 return 0; // cause the engine to do updates once per frame only\r
194}\r
195\r
196UINT8 YM2612Read_940(void)\r
197{\r
198 return ST_status;\r
199}\r
200\r
201\r
202int YM2612PicoTick_940(int n)\r
203{\r
204 //int ret = 0;\r
205\r
206 // timer A\r
207 if(ST_mode & 0x01 && (ST_TAT+=64*n) >= ST_TAC) {\r
208 ST_TAT -= ST_TAC;\r
209 if(ST_mode & 0x04) ST_status |= 1;\r
210 // CSM mode total level latch and auto key on\r
211/* FIXME\r
212 if(ST_mode & 0x80) {\r
213 CSMKeyControll( &(ym2612_940->CH[2]) ); // Vectorman2, etc.\r
214 ret = 1;\r
215 }\r
216*/\r
217 }\r
218\r
219 // timer B\r
220 if(ST_mode & 0x02 && (ST_TBT+=64*n) >= ST_TBC) {\r
221 ST_TBT -= ST_TBC;\r
222 if(ST_mode & 0x08) ST_status |= 2;\r
223 }\r
224\r
225 return 0;\r
226}\r
227\r
228\r
229#define CHECK_BUSY(job) \\r
230 (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r
231\r
232static void wait_busy_940(int job)\r
233{\r
234 int i;\r
235\r
236 job--;\r
237 for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r
238 spend_cycles(8*1024); // tested to be best for mp3 dec\r
239 if (i < 0x10000) return;\r
240\r
241 /* 940 crashed */\r
242 printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r
243 for (i = 0; i < 8; i++)\r
244 printf("%i ", shared_ctl->vstarts[i]);\r
245 printf(")\n");\r
246 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
247 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
248 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
249 printf("trying to interrupt..\n");\r
250 gp2x_memregs[0x3B3E>>1] = 0xffff;\r
251 for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r
252 spend_cycles(8*1024);\r
253 printf("i = 0x%x\n", i);\r
254 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
255 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
256 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
257\r
258 strcpy(menuErrorMsg, "940 crashed.");\r
259 engineState = PGS_Menu;\r
260 crashed_940 = 1;\r
261}\r
262\r
263\r
264static void add_job_940(int job)\r
265{\r
266 if (job <= 0 || job > 16) {\r
267 printf("add_job_940: bad job: %i\n", job);\r
268 return;\r
269 }\r
270\r
271 // generate interrupt for this job\r
272 job--;\r
273 gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r
274\r
275// printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r
276}\r
277\r
278\r
279void YM2612PicoStateLoad_940(void)\r
280{\r
281 int i, old_A1 = addr_A1;\r
282\r
283 // feed all the registers and update internal state\r
284 for(i = 0; i < 0x100; i++) {\r
285 YM2612Write_940(0, i);\r
286 YM2612Write_940(1, REGS[i]);\r
287 }\r
288 for(i = 0; i < 0x100; i++) {\r
289 YM2612Write_940(2, i);\r
290 YM2612Write_940(3, REGS[i|0x100]);\r
291 }\r
292\r
293 addr_A1 = old_A1;\r
294\r
295 add_job_940(JOB940_PICOSTATELOAD);\r
296}\r
297\r
298\r
299static void internal_reset(void)\r
300{\r
301 writebuff_ptr = 0;\r
302 ST_mode = 0;\r
303 ST_status = 0; /* normal mode */\r
304 ST_TA = 0;\r
305 ST_TAC = 0;\r
306 ST_TB = 0;\r
307 ST_TBC = 0;\r
308 dacen = 0;\r
309}\r
310\r
311\r
312extern char **g_argv;\r
313\r
314/* none of the functions in this file should be called before this one */\r
315void YM2612Init_940(int baseclock, int rate)\r
316{\r
317 printf("YM2612Init_940()\n");\r
318 printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r
319\r
320 Reset940(1, 2);\r
321 Pause940(1);\r
322\r
323 gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r
324 gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r
325\r
326 gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r
327 gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r
328\r
329\r
330\r
331 if (shared_mem == NULL)\r
332 {\r
333 shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r
334 if(shared_mem == MAP_FAILED)\r
335 {\r
336 printf("mmap(shared_data) failed with %i\n", errno);\r
337 exit(1);\r
338 }\r
339 shared_data = (_940_data_t *) (shared_mem+0x100000);\r
340 /* this area must not get buffered on either side */\r
341 shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r
342 mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x3000000);\r
343 if (mp3_mem == MAP_FAILED)\r
344 {\r
345 printf("mmap(mp3_mem) failed with %i\n", errno);\r
346 exit(1);\r
347 }\r
348 crashed_940 = 1;\r
349 }\r
350\r
351 if (crashed_940)\r
352 {\r
353 unsigned char ucData[1024];\r
354 int nRead, i, nLen = 0;\r
355 char binpath[1024];\r
356 FILE *fp;\r
357\r
358 strncpy(binpath, g_argv[0], 1023);\r
359 binpath[1023] = 0;\r
360 for (i = strlen(binpath); i > 0; i--)\r
361 if (binpath[i] == '/') { binpath[i] = 0; break; }\r
362 strcat(binpath, "/code940.bin");\r
363\r
364 fp = fopen(binpath, "rb");\r
365 if(!fp)\r
366 {\r
367 memset(gp2x_screen, 0, 320*240);\r
368 gp2x_text_out8(10, 100, "failed to open required file:");\r
369 gp2x_text_out8(10, 110, "code940.bin");\r
370 gp2x_video_flip();\r
371 printf("failed to open %s\n", binpath);\r
372 exit(1);\r
373 }\r
374\r
375 while(1)\r
376 {\r
377 nRead = fread(ucData, 1, 1024, fp);\r
378 if(nRead <= 0)\r
379 break;\r
380 memcpy(shared_mem + nLen, ucData, nRead);\r
381 nLen += nRead;\r
382 }\r
383 fclose(fp);\r
384 crashed_940 = 0;\r
385 }\r
386\r
387 memset(shared_data, 0, sizeof(*shared_data));\r
388 memset(shared_ctl, 0, sizeof(*shared_ctl));\r
389\r
390 REGS = YM2612GetRegs();\r
391\r
392 ym2612_dacen = &dacen;\r
393 ym2612_dacout = &dacout;\r
394\r
395 internal_reset();\r
396\r
397 loaded_mp3 = 0;\r
398\r
399 gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r
400 gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r
401 gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r
402\r
403 /* start the 940 */\r
404 Reset940(0, 2);\r
405 Pause940(0);\r
406\r
407 // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r
408\r
409 /* now cause 940 to init it's ym2612 stuff */\r
410 shared_ctl->baseclock = baseclock;\r
411 shared_ctl->rate = rate;\r
412 add_job_940(JOB940_INITALL);\r
413}\r
414\r
415\r
416void YM2612ResetChip_940(void)\r
417{\r
418 printf("YM2612ResetChip_940()\n");\r
419 if (shared_data == NULL) {\r
420 printf("YM2612ResetChip_940: reset before init?\n");\r
421 return;\r
422 }\r
423\r
424 internal_reset();\r
425\r
426 add_job_940(JOB940_YM2612RESETCHIP);\r
427}\r
428\r
429\r
430int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r
431{\r
432 int *ym_buf = shared_data->ym_buffer;\r
433\r
434 //printf("YM2612UpdateOne_940()\n");\r
435\r
436 if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
437\r
438 // mix in ym buffer\r
439 if (is_buf_empty) memcpy32(buffer, ym_buf, length<<stereo);\r
440 // else TODO\r
441\r
442// for (len = length << stereo; len > 0; len--)\r
443// {\r
444// *dest_buf++ += *ym_buf++;\r
445// }\r
446\r
447 if (shared_ctl->writebuffsel == 1) {\r
448 shared_ctl->writebuff0[writebuff_ptr] = 0xffff;\r
449 } else {\r
450 shared_ctl->writebuff1[writebuff_ptr] = 0xffff;\r
451 }\r
452 writebuff_ptr = 0;\r
453\r
454 /* predict sample counter for next frame */\r
455 if (PsndLen_exc_add) {\r
456 if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length = PsndLen + 1;\r
457 else length = PsndLen;\r
458 }\r
459\r
460 /* give 940 ym job */\r
461 shared_ctl->writebuffsel ^= 1;\r
462 shared_ctl->length = length;\r
463 shared_ctl->stereo = stereo;\r
464\r
465 add_job_940(JOB940_YM2612UPDATEONE);\r
466\r
467 return 1;\r
468}\r
469\r
470\r
471static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r
472static int mp3_play_bufsel = 0, mp3_job_started = 0;\r
473\r
474void mp3_update(int *buffer, int length, int stereo)\r
475{\r
476 int length_mp3;\r
477 int cdda_on;\r
478\r
479 // not data track, CDC is reading, playback was started, track not ended\r
480 cdda_on = !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1) &&\r
481 loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r
482\r
483 if (!cdda_on) return;\r
484\r
485 if (!(PicoOpt&0x200)) {\r
486 mp3_update_local(buffer, length, stereo);\r
487 return;\r
488 }\r
489\r
490 length_mp3 = length;\r
491 if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r
492 else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r
493\r
494 /* do we have to wait? */\r
495 if (mp3_job_started && mp3_samples_ready < length_mp3) {\r
496 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
497 mp3_job_started = 0;\r
498 mp3_samples_ready += 1152;\r
499 }\r
500\r
501 /* mix mp3 data, only stereo */\r
502 if (mp3_samples_ready >= length_mp3)\r
503 {\r
504 int shr = 0;\r
505 void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r
506 if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r
507 else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r
508\r
509 if (1152 - mp3_buffer_offs >= length_mp3) {\r
510 mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r
511\r
512 mp3_buffer_offs += length_mp3;\r
513 } else {\r
514 // collect samples from both buffers..\r
515 int left = 1152 - mp3_buffer_offs;\r
516 if (mp3_play_bufsel == 0)\r
517 {\r
518 mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r
519 mp3_buffer_offs = length_mp3 - left;\r
520 mp3_play_bufsel = 1;\r
521 } else {\r
522 mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r
523 mp3_buffer_offs = length_mp3 - left;\r
524 mix_samples(buffer + ((left>>shr)<<1),\r
525 shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r
526 mp3_play_bufsel = 0;\r
527 }\r
528 }\r
529 mp3_samples_ready -= length_mp3;\r
530 }\r
531\r
532 // ask to decode more if we already can\r
533 if (!mp3_job_started)\r
534 {\r
535 mp3_job_started = 1;\r
536 shared_ctl->mp3_buffsel ^= 1;\r
537 add_job_940(JOB940_MP3DECODE);\r
538 }\r
539}\r
540\r
541\r
542/***********************************************************/\r
543\r
544void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r
545{\r
546 int byte_offs = 0;\r
547\r
548 if (!(PicoOpt&0x800)) { // cdda disabled?\r
549 return;\r
550 }\r
551\r
552 if (loaded_mp3 != f)\r
553 {\r
554 // printf("loading mp3... "); fflush(stdout);\r
555 fseek(f, 0, SEEK_SET);\r
556 fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r
557 // if (feof(f)) printf("done.\n");\r
558 // else printf("done. mp3 too large, not all data loaded.\n");\r
559 shared_ctl->mp3_len = ftell(f);\r
560 loaded_mp3 = f;\r
561\r
562 if (PicoOpt&0x200) {\r
563 // as we are going to change 940's cacheable area, we must invalidate it's cache..\r
564 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
565 add_job_940(JOB940_INVALIDATE_DCACHE);\r
566 }\r
567 }\r
568\r
569 // seek..\r
570 if (pos) {\r
571 byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r
572 byte_offs *= pos;\r
573 byte_offs >>= 6;\r
574 }\r
575 // printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r
576\r
577 shared_ctl->mp3_offs = byte_offs;\r
578\r
579 // reset buffer pointers and stuff..\r
580 mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r
581 mp3_job_started = 0;\r
582 shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r
583\r
584 if (!(PicoOpt&0x200)) mp3_start_local();\r
585}\r
586\r
587\r
588int mp3_get_offset(void)\r
589{\r
590 int offs1024 = 0;\r
591 int cdda_on;\r
592\r
593 cdda_on = (PicoMCD & 1) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r
594 (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r
595\r
596 if (cdda_on) {\r
597 offs1024 = shared_ctl->mp3_offs << 7;\r
598 offs1024 /= shared_ctl->mp3_len;\r
599 offs1024 <<= 3;\r
600 }\r
601 printf("offs1024=%i (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r
602\r
603 return offs1024;\r
604}\r
605\r
606\r
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