6ab2f79c |
1 | // Code for communication with ARM940 and control of it.\r |
2 | // (c) Copyright 2007, Grazvydas "notaz" Ignotas\r |
3 | \r |
720ee7f6 |
4 | #include <stdio.h>\r |
5 | #include <stdlib.h>\r |
6 | #include <string.h>\r |
7 | #include <unistd.h>\r |
8 | #include <sys/mman.h>\r |
9 | #include <sys/ioctl.h>\r |
10 | #include <fcntl.h>\r |
11 | #include <errno.h>\r |
12 | \r |
b30a8e67 |
13 | #include "code940/940shared.h"\r |
720ee7f6 |
14 | #include "gp2x.h"\r |
15 | #include "emu.h"\r |
16 | #include "menu.h"\r |
17 | #include "asmutils.h"\r |
edbb82f8 |
18 | #include "mp3.h"\r |
598e7c06 |
19 | #include "../../Pico/PicoInt.h"\r |
49fe50f0 |
20 | #include "../../Pico/sound/mix.h"\r |
21 | \r |
720ee7f6 |
22 | /* we will need some gp2x internals here */\r |
23 | extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */\r |
24 | extern volatile unsigned long *gp2x_memregl;\r |
25 | \r |
8f1b51ef |
26 | extern int reset_timing;\r |
720ee7f6 |
27 | static unsigned char *shared_mem = 0;\r |
28 | static _940_data_t *shared_data = 0;\r |
edbb82f8 |
29 | _940_ctl_t *shared_ctl = 0;\r |
30 | unsigned char *mp3_mem = 0;\r |
598e7c06 |
31 | \r |
32 | #define MP3_SIZE_MAX (0x1000000 - 4*640*480)\r |
720ee7f6 |
33 | \r |
34 | int crashed_940 = 0;\r |
35 | \r |
979ba09f |
36 | static FILE *loaded_mp3 = 0;\r |
720ee7f6 |
37 | \r |
38 | /***********************************************************/\r |
39 | \r |
40 | #define MAXOUT (+32767)\r |
41 | #define MINOUT (-32768)\r |
42 | \r |
43 | /* limitter */\r |
44 | #define Limit(val, max,min) { \\r |
45 | if ( val > max ) val = max; \\r |
46 | else if ( val < min ) val = min; \\r |
47 | }\r |
48 | \r |
49 | /* these will be managed locally on our side */\r |
50 | extern int *ym2612_dacen;\r |
51 | extern INT32 *ym2612_dacout;\r |
52 | extern void *ym2612_regs;\r |
53 | \r |
54 | static UINT8 *REGS = 0; /* we will also keep local copy of regs for savestates and such */\r |
55 | static INT32 addr_A1; /* address line A1 */\r |
56 | static int dacen;\r |
57 | static INT32 dacout;\r |
58 | static UINT8 ST_address; /* address register */\r |
59 | static UINT8 ST_status; /* status flag */\r |
60 | static UINT8 ST_mode; /* mode CSM / 3SLOT */\r |
61 | static int ST_TA; /* timer a */\r |
62 | static int ST_TAC; /* timer a maxval */\r |
63 | static int ST_TAT; /* timer a ticker */\r |
64 | static UINT8 ST_TB; /* timer b */\r |
65 | static int ST_TBC; /* timer b maxval */\r |
66 | static int ST_TBT; /* timer b ticker */\r |
67 | \r |
68 | static int writebuff_ptr = 0;\r |
69 | \r |
70 | \r |
71 | /* OPN Mode Register Write */\r |
79cad122 |
72 | static int set_timers( int v )\r |
720ee7f6 |
73 | {\r |
79cad122 |
74 | int change;\r |
75 | \r |
720ee7f6 |
76 | /* b7 = CSM MODE */\r |
77 | /* b6 = 3 slot mode */\r |
78 | /* b5 = reset b */\r |
79 | /* b4 = reset a */\r |
80 | /* b3 = timer enable b */\r |
81 | /* b2 = timer enable a */\r |
82 | /* b1 = load b */\r |
83 | /* b0 = load a */\r |
79cad122 |
84 | change = (ST_mode ^ v) & 0xc0;\r |
720ee7f6 |
85 | ST_mode = v;\r |
86 | \r |
87 | /* reset Timer b flag */\r |
88 | if( v & 0x20 )\r |
89 | ST_status &= ~2;\r |
90 | \r |
91 | /* reset Timer a flag */\r |
92 | if( v & 0x10 )\r |
93 | ST_status &= ~1;\r |
79cad122 |
94 | \r |
95 | return change;\r |
720ee7f6 |
96 | }\r |
97 | \r |
98 | /* YM2612 write */\r |
99 | /* a = address */\r |
100 | /* v = value */\r |
101 | /* returns 1 if sample affecting state changed */\r |
102 | int YM2612Write_940(unsigned int a, unsigned int v)\r |
103 | {\r |
79cad122 |
104 | int addr;\r |
105 | int upd = 1; /* the write affects sample generation */\r |
720ee7f6 |
106 | \r |
107 | v &= 0xff; /* adjust to 8 bit bus */\r |
108 | a &= 3;\r |
109 | \r |
79cad122 |
110 | //printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r |
111 | \r |
720ee7f6 |
112 | switch( a ) {\r |
113 | case 0: /* address port 0 */\r |
d032c15a |
114 | if (!addr_A1 && ST_address == v)\r |
115 | return 0; /* address already selected, don't send this command to 940 */\r |
720ee7f6 |
116 | ST_address = v;\r |
d032c15a |
117 | /* don't send DAC or timer related address changes to 940 */\r |
118 | if (!addr_A1 && (v & 0xf0) == 0x20 &&\r |
119 | (v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a))\r |
120 | return 0;\r |
720ee7f6 |
121 | addr_A1 = 0;\r |
79cad122 |
122 | upd = 0;\r |
720ee7f6 |
123 | break;\r |
124 | \r |
125 | case 1: /* data port 0 */\r |
126 | if (addr_A1 != 0) {\r |
127 | return 0; /* verified on real YM2608 */\r |
128 | }\r |
129 | \r |
130 | addr = ST_address;\r |
131 | REGS[addr] = v;\r |
132 | \r |
133 | switch( addr & 0xf0 )\r |
134 | {\r |
135 | case 0x20: /* 0x20-0x2f Mode */\r |
136 | switch( addr )\r |
137 | {\r |
138 | case 0x24: { // timer A High 8\r |
139 | int TAnew = (ST_TA & 0x03)|(((int)v)<<2);\r |
140 | if(ST_TA != TAnew) {\r |
141 | // we should reset ticker only if new value is written. Outrun requires this.\r |
142 | ST_TA = TAnew;\r |
143 | ST_TAC = (1024-TAnew)*18;\r |
144 | ST_TAT = 0;\r |
145 | }\r |
146 | return 0;\r |
147 | }\r |
148 | case 0x25: { // timer A Low 2\r |
149 | int TAnew = (ST_TA & 0x3fc)|(v&3);\r |
150 | if(ST_TA != TAnew) {\r |
151 | ST_TA = TAnew;\r |
152 | ST_TAC = (1024-TAnew)*18;\r |
153 | ST_TAT = 0;\r |
154 | }\r |
155 | return 0;\r |
156 | }\r |
157 | case 0x26: // timer B\r |
158 | if(ST_TB != v) {\r |
159 | ST_TB = v;\r |
160 | ST_TBC = (256-v)<<4;\r |
161 | ST_TBC *= 18;\r |
162 | ST_TBT = 0;\r |
163 | }\r |
164 | return 0;\r |
165 | case 0x27: /* mode, timer control */\r |
79cad122 |
166 | if (set_timers( v ))\r |
167 | break; // other side needs ST.mode for 3slot mode\r |
168 | return 0;\r |
720ee7f6 |
169 | case 0x2a: /* DAC data (YM2612) */\r |
170 | dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */\r |
171 | return 0;\r |
172 | case 0x2b: /* DAC Sel (YM2612) */\r |
173 | /* b7 = dac enable */\r |
174 | dacen = v & 0x80;\r |
79cad122 |
175 | upd = 0;\r |
720ee7f6 |
176 | break; // other side has to know this\r |
177 | default:\r |
178 | break;\r |
179 | }\r |
180 | break;\r |
181 | }\r |
182 | break;\r |
183 | \r |
184 | case 2: /* address port 1 */\r |
d032c15a |
185 | if (addr_A1 && ST_address == v)\r |
186 | return 0;\r |
720ee7f6 |
187 | ST_address = v;\r |
188 | addr_A1 = 1;\r |
79cad122 |
189 | upd = 0;\r |
720ee7f6 |
190 | break;\r |
191 | \r |
192 | case 3: /* data port 1 */\r |
193 | if (addr_A1 != 1) {\r |
194 | return 0; /* verified on real YM2608 */\r |
195 | }\r |
196 | \r |
197 | addr = ST_address | 0x100;\r |
198 | REGS[addr] = v;\r |
199 | break;\r |
200 | }\r |
201 | \r |
79cad122 |
202 | //printf("ym pass\n");\r |
203 | \r |
720ee7f6 |
204 | if(currentConfig.EmuOpt & 4) {\r |
79cad122 |
205 | UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r |
206 | \r |
207 | /* detect rapid ym updates */\r |
208 | if (upd && !(writebuff_ptr & 0x80000000) && Pico.m.scanline < 224) {\r |
209 | int mid = Pico.m.pal ? 68 : 93;\r |
210 | if (Pico.m.scanline > mid) {\r |
211 | //printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, Pico.m.scanline);\r |
212 | writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r |
213 | writebuff_ptr |= 0x80000000;\r |
214 | //printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, Pico.m.scanline, addr, v, upd);\r |
720ee7f6 |
215 | }\r |
79cad122 |
216 | }\r |
217 | \r |
218 | /* queue this write for 940 */\r |
219 | if ((writebuff_ptr&0xffff) < 2047) {\r |
220 | writebuff[writebuff_ptr++ & 0xffff] = (a<<8)|v;\r |
720ee7f6 |
221 | } else {\r |
d032c15a |
222 | printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r |
720ee7f6 |
223 | }\r |
224 | }\r |
225 | \r |
226 | return 0; // cause the engine to do updates once per frame only\r |
227 | }\r |
228 | \r |
229 | UINT8 YM2612Read_940(void)\r |
230 | {\r |
231 | return ST_status;\r |
232 | }\r |
233 | \r |
234 | \r |
235 | int YM2612PicoTick_940(int n)\r |
236 | {\r |
237 | //int ret = 0;\r |
238 | \r |
239 | // timer A\r |
240 | if(ST_mode & 0x01 && (ST_TAT+=64*n) >= ST_TAC) {\r |
241 | ST_TAT -= ST_TAC;\r |
242 | if(ST_mode & 0x04) ST_status |= 1;\r |
243 | // CSM mode total level latch and auto key on\r |
244 | /* FIXME\r |
245 | if(ST_mode & 0x80) {\r |
246 | CSMKeyControll( &(ym2612_940->CH[2]) ); // Vectorman2, etc.\r |
247 | ret = 1;\r |
248 | }\r |
249 | */\r |
250 | }\r |
251 | \r |
252 | // timer B\r |
253 | if(ST_mode & 0x02 && (ST_TBT+=64*n) >= ST_TBC) {\r |
254 | ST_TBT -= ST_TBC;\r |
255 | if(ST_mode & 0x08) ST_status |= 2;\r |
256 | }\r |
257 | \r |
258 | return 0;\r |
259 | }\r |
260 | \r |
261 | \r |
edbb82f8 |
262 | #define CHECK_BUSY(job) \\r |
263 | (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r |
264 | \r |
265 | static void wait_busy_940(int job)\r |
720ee7f6 |
266 | {\r |
267 | int i;\r |
720ee7f6 |
268 | \r |
edbb82f8 |
269 | job--;\r |
270 | for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r |
b30a8e67 |
271 | spend_cycles(8*1024); // tested to be best for mp3 dec\r |
720ee7f6 |
272 | if (i < 0x10000) return;\r |
273 | \r |
274 | /* 940 crashed */\r |
b30a8e67 |
275 | printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r |
720ee7f6 |
276 | for (i = 0; i < 8; i++)\r |
277 | printf("%i ", shared_ctl->vstarts[i]);\r |
278 | printf(")\n");\r |
edbb82f8 |
279 | printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r |
49fe50f0 |
280 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
edbb82f8 |
281 | printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r |
49fe50f0 |
282 | printf("trying to interrupt..\n");\r |
283 | gp2x_memregs[0x3B3E>>1] = 0xffff;\r |
edbb82f8 |
284 | for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r |
49fe50f0 |
285 | spend_cycles(8*1024);\r |
286 | printf("i = 0x%x\n", i);\r |
edbb82f8 |
287 | printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r |
49fe50f0 |
288 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
edbb82f8 |
289 | printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r |
49fe50f0 |
290 | \r |
6ab2f79c |
291 | strcpy(menuErrorMsg, "940 crashed, too much overclock?");\r |
720ee7f6 |
292 | engineState = PGS_Menu;\r |
293 | crashed_940 = 1;\r |
720ee7f6 |
294 | }\r |
295 | \r |
296 | \r |
edbb82f8 |
297 | static void add_job_940(int job)\r |
720ee7f6 |
298 | {\r |
edbb82f8 |
299 | if (job <= 0 || job > 16) {\r |
300 | printf("add_job_940: bad job: %i\n", job);\r |
301 | return;\r |
49fe50f0 |
302 | }\r |
edbb82f8 |
303 | \r |
304 | // generate interrupt for this job\r |
305 | job--;\r |
306 | gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r |
307 | \r |
308 | // printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r |
720ee7f6 |
309 | }\r |
310 | \r |
311 | \r |
312 | void YM2612PicoStateLoad_940(void)\r |
313 | {\r |
314 | int i, old_A1 = addr_A1;\r |
315 | \r |
720ee7f6 |
316 | // feed all the registers and update internal state\r |
317 | for(i = 0; i < 0x100; i++) {\r |
318 | YM2612Write_940(0, i);\r |
319 | YM2612Write_940(1, REGS[i]);\r |
320 | }\r |
321 | for(i = 0; i < 0x100; i++) {\r |
322 | YM2612Write_940(2, i);\r |
323 | YM2612Write_940(3, REGS[i|0x100]);\r |
324 | }\r |
325 | \r |
326 | addr_A1 = old_A1;\r |
327 | \r |
79cad122 |
328 | // add_job_940(JOB940_PICOSTATELOAD);\r |
720ee7f6 |
329 | }\r |
330 | \r |
331 | \r |
332 | static void internal_reset(void)\r |
333 | {\r |
334 | writebuff_ptr = 0;\r |
335 | ST_mode = 0;\r |
336 | ST_status = 0; /* normal mode */\r |
337 | ST_TA = 0;\r |
338 | ST_TAC = 0;\r |
339 | ST_TB = 0;\r |
340 | ST_TBC = 0;\r |
341 | dacen = 0;\r |
342 | }\r |
343 | \r |
344 | \r |
52d3dd5f |
345 | /* this must be called after mmu hack, the allocated regions must not get cached */\r |
346 | void sharedmem_init(void)\r |
347 | {\r |
348 | if (shared_mem != NULL) return;\r |
349 | \r |
350 | shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r |
351 | if(shared_mem == MAP_FAILED)\r |
352 | {\r |
353 | printf("mmap(shared_data) failed with %i\n", errno);\r |
354 | exit(1);\r |
355 | }\r |
356 | shared_data = (_940_data_t *) (shared_mem+0x100000);\r |
357 | /* this area must not get buffered on either side */\r |
358 | shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r |
359 | mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x3000000);\r |
360 | if (mp3_mem == MAP_FAILED)\r |
361 | {\r |
362 | printf("mmap(mp3_mem) failed with %i\n", errno);\r |
363 | exit(1);\r |
364 | }\r |
365 | crashed_940 = 1;\r |
366 | }\r |
367 | \r |
368 | \r |
4dfd9f42 |
369 | void sharedmem_deinit(void)\r |
370 | {\r |
371 | munmap(shared_mem, 0x210000);\r |
372 | munmap(mp3_mem, MP3_SIZE_MAX);\r |
373 | shared_mem = mp3_mem = NULL;\r |
374 | shared_data = NULL;\r |
375 | shared_ctl = NULL;\r |
376 | }\r |
377 | \r |
378 | \r |
720ee7f6 |
379 | extern char **g_argv;\r |
380 | \r |
381 | /* none of the functions in this file should be called before this one */\r |
382 | void YM2612Init_940(int baseclock, int rate)\r |
383 | {\r |
384 | printf("YM2612Init_940()\n");\r |
8dfb9fd5 |
385 | printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r |
720ee7f6 |
386 | \r |
8dfb9fd5 |
387 | Reset940(1, 2);\r |
720ee7f6 |
388 | Pause940(1);\r |
389 | \r |
49fe50f0 |
390 | gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r |
391 | gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r |
720ee7f6 |
392 | \r |
edbb82f8 |
393 | gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r |
394 | gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r |
395 | \r |
396 | \r |
720ee7f6 |
397 | if (crashed_940)\r |
398 | {\r |
399 | unsigned char ucData[1024];\r |
400 | int nRead, i, nLen = 0;\r |
401 | char binpath[1024];\r |
402 | FILE *fp;\r |
403 | \r |
404 | strncpy(binpath, g_argv[0], 1023);\r |
405 | binpath[1023] = 0;\r |
406 | for (i = strlen(binpath); i > 0; i--)\r |
407 | if (binpath[i] == '/') { binpath[i] = 0; break; }\r |
408 | strcat(binpath, "/code940.bin");\r |
409 | \r |
410 | fp = fopen(binpath, "rb");\r |
411 | if(!fp)\r |
412 | {\r |
413 | memset(gp2x_screen, 0, 320*240);\r |
414 | gp2x_text_out8(10, 100, "failed to open required file:");\r |
415 | gp2x_text_out8(10, 110, "code940.bin");\r |
416 | gp2x_video_flip();\r |
417 | printf("failed to open %s\n", binpath);\r |
418 | exit(1);\r |
419 | }\r |
420 | \r |
421 | while(1)\r |
422 | {\r |
423 | nRead = fread(ucData, 1, 1024, fp);\r |
424 | if(nRead <= 0)\r |
425 | break;\r |
426 | memcpy(shared_mem + nLen, ucData, nRead);\r |
427 | nLen += nRead;\r |
428 | }\r |
429 | fclose(fp);\r |
430 | crashed_940 = 0;\r |
431 | }\r |
432 | \r |
433 | memset(shared_data, 0, sizeof(*shared_data));\r |
434 | memset(shared_ctl, 0, sizeof(*shared_ctl));\r |
435 | \r |
436 | REGS = YM2612GetRegs();\r |
437 | \r |
438 | ym2612_dacen = &dacen;\r |
439 | ym2612_dacout = &dacout;\r |
440 | \r |
441 | internal_reset();\r |
442 | \r |
979ba09f |
443 | loaded_mp3 = 0;\r |
444 | \r |
49fe50f0 |
445 | gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r |
edbb82f8 |
446 | gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r |
447 | gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r |
720ee7f6 |
448 | \r |
449 | /* start the 940 */\r |
8dfb9fd5 |
450 | Reset940(0, 2);\r |
720ee7f6 |
451 | Pause940(0);\r |
452 | \r |
453 | // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r |
edbb82f8 |
454 | \r |
455 | /* now cause 940 to init it's ym2612 stuff */\r |
456 | shared_ctl->baseclock = baseclock;\r |
457 | shared_ctl->rate = rate;\r |
458 | add_job_940(JOB940_INITALL);\r |
720ee7f6 |
459 | }\r |
460 | \r |
461 | \r |
462 | void YM2612ResetChip_940(void)\r |
463 | {\r |
464 | printf("YM2612ResetChip_940()\n");\r |
465 | if (shared_data == NULL) {\r |
466 | printf("YM2612ResetChip_940: reset before init?\n");\r |
467 | return;\r |
468 | }\r |
469 | \r |
720ee7f6 |
470 | internal_reset();\r |
471 | \r |
edbb82f8 |
472 | add_job_940(JOB940_YM2612RESETCHIP);\r |
720ee7f6 |
473 | }\r |
474 | \r |
475 | \r |
edbb82f8 |
476 | int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r |
598e7c06 |
477 | {\r |
edbb82f8 |
478 | int *ym_buf = shared_data->ym_buffer;\r |
4dfd9f42 |
479 | int ym_active_chs;\r |
49fe50f0 |
480 | \r |
edbb82f8 |
481 | //printf("YM2612UpdateOne_940()\n");\r |
482 | \r |
483 | if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r |
484 | \r |
4dfd9f42 |
485 | ym_active_chs = shared_ctl->ym_active_chs;\r |
edbb82f8 |
486 | \r |
4dfd9f42 |
487 | // mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r |
488 | if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r |
489 | else memset32(buffer, 0, length<<stereo);\r |
edbb82f8 |
490 | \r |
491 | if (shared_ctl->writebuffsel == 1) {\r |
79cad122 |
492 | shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r |
49fe50f0 |
493 | } else {\r |
79cad122 |
494 | shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r |
598e7c06 |
495 | }\r |
edbb82f8 |
496 | writebuff_ptr = 0;\r |
497 | \r |
498 | /* predict sample counter for next frame */\r |
499 | if (PsndLen_exc_add) {\r |
500 | if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length = PsndLen + 1;\r |
501 | else length = PsndLen;\r |
502 | }\r |
503 | \r |
504 | /* give 940 ym job */\r |
505 | shared_ctl->writebuffsel ^= 1;\r |
506 | shared_ctl->length = length;\r |
507 | shared_ctl->stereo = stereo;\r |
508 | \r |
509 | add_job_940(JOB940_YM2612UPDATEONE);\r |
510 | \r |
4dfd9f42 |
511 | return ym_active_chs;\r |
598e7c06 |
512 | }\r |
598e7c06 |
513 | \r |
598e7c06 |
514 | \r |
979ba09f |
515 | static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r |
edbb82f8 |
516 | static int mp3_play_bufsel = 0, mp3_job_started = 0;\r |
598e7c06 |
517 | \r |
edbb82f8 |
518 | void mp3_update(int *buffer, int length, int stereo)\r |
720ee7f6 |
519 | {\r |
edbb82f8 |
520 | int length_mp3;\r |
521 | int cdda_on;\r |
49fe50f0 |
522 | \r |
edbb82f8 |
523 | // not data track, CDC is reading, playback was started, track not ended\r |
524 | cdda_on = !(Pico_mcd->s68k_regs[0x36] & 1) && (Pico_mcd->scd.Status_CDC & 1) &&\r |
525 | loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r |
720ee7f6 |
526 | \r |
edbb82f8 |
527 | if (!cdda_on) return;\r |
720ee7f6 |
528 | \r |
edbb82f8 |
529 | if (!(PicoOpt&0x200)) {\r |
530 | mp3_update_local(buffer, length, stereo);\r |
531 | return;\r |
532 | }\r |
720ee7f6 |
533 | \r |
edbb82f8 |
534 | length_mp3 = length;\r |
535 | if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r |
536 | else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r |
49fe50f0 |
537 | \r |
edbb82f8 |
538 | /* do we have to wait? */\r |
539 | if (mp3_job_started && mp3_samples_ready < length_mp3) {\r |
540 | if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r |
541 | mp3_job_started = 0;\r |
542 | mp3_samples_ready += 1152;\r |
543 | }\r |
598e7c06 |
544 | \r |
49fe50f0 |
545 | /* mix mp3 data, only stereo */\r |
edbb82f8 |
546 | if (mp3_samples_ready >= length_mp3)\r |
598e7c06 |
547 | {\r |
49fe50f0 |
548 | int shr = 0;\r |
549 | void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r |
550 | if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r |
551 | else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r |
598e7c06 |
552 | \r |
49fe50f0 |
553 | if (1152 - mp3_buffer_offs >= length_mp3) {\r |
edbb82f8 |
554 | mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r |
49fe50f0 |
555 | \r |
556 | mp3_buffer_offs += length_mp3;\r |
598e7c06 |
557 | } else {\r |
edbb82f8 |
558 | // collect samples from both buffers..\r |
598e7c06 |
559 | int left = 1152 - mp3_buffer_offs;\r |
49fe50f0 |
560 | if (mp3_play_bufsel == 0)\r |
561 | {\r |
edbb82f8 |
562 | mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r |
49fe50f0 |
563 | mp3_buffer_offs = length_mp3 - left;\r |
564 | mp3_play_bufsel = 1;\r |
565 | } else {\r |
566 | mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r |
567 | mp3_buffer_offs = length_mp3 - left;\r |
568 | mix_samples(buffer + ((left>>shr)<<1),\r |
569 | shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r |
570 | mp3_play_bufsel = 0;\r |
571 | }\r |
720ee7f6 |
572 | }\r |
49fe50f0 |
573 | mp3_samples_ready -= length_mp3;\r |
720ee7f6 |
574 | }\r |
575 | \r |
edbb82f8 |
576 | // ask to decode more if we already can\r |
577 | if (!mp3_job_started)\r |
598e7c06 |
578 | {\r |
edbb82f8 |
579 | mp3_job_started = 1;\r |
598e7c06 |
580 | shared_ctl->mp3_buffsel ^= 1;\r |
edbb82f8 |
581 | add_job_940(JOB940_MP3DECODE);\r |
598e7c06 |
582 | }\r |
720ee7f6 |
583 | }\r |
598e7c06 |
584 | \r |
585 | \r |
586 | /***********************************************************/\r |
587 | \r |
588 | void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r |
589 | {\r |
590 | int byte_offs = 0;\r |
591 | \r |
7bc9cd7f |
592 | if (!(PicoOpt&0x800)) { // cdda disabled?\r |
598e7c06 |
593 | return;\r |
594 | }\r |
595 | \r |
596 | if (loaded_mp3 != f)\r |
597 | {\r |
49fe50f0 |
598 | // printf("loading mp3... "); fflush(stdout);\r |
dfa4c846 |
599 | if (PicoMessage != NULL)\r |
600 | {\r |
601 | fseek(f, 0, SEEK_END);\r |
602 | if (ftell(f) > 2*1024*1024)\r |
603 | PicoMessage("Loading MP3...");\r |
604 | }\r |
598e7c06 |
605 | fseek(f, 0, SEEK_SET);\r |
606 | fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r |
49fe50f0 |
607 | // if (feof(f)) printf("done.\n");\r |
608 | // else printf("done. mp3 too large, not all data loaded.\n");\r |
598e7c06 |
609 | shared_ctl->mp3_len = ftell(f);\r |
610 | loaded_mp3 = f;\r |
edbb82f8 |
611 | \r |
612 | if (PicoOpt&0x200) {\r |
613 | // as we are going to change 940's cacheable area, we must invalidate it's cache..\r |
614 | if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r |
615 | add_job_940(JOB940_INVALIDATE_DCACHE);\r |
616 | }\r |
8f1b51ef |
617 | reset_timing = 1;\r |
598e7c06 |
618 | }\r |
619 | \r |
620 | // seek..\r |
621 | if (pos) {\r |
622 | byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r |
623 | byte_offs *= pos;\r |
624 | byte_offs >>= 6;\r |
625 | }\r |
49fe50f0 |
626 | // printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r |
598e7c06 |
627 | \r |
628 | shared_ctl->mp3_offs = byte_offs;\r |
979ba09f |
629 | \r |
edbb82f8 |
630 | // reset buffer pointers and stuff..\r |
979ba09f |
631 | mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r |
edbb82f8 |
632 | mp3_job_started = 0;\r |
979ba09f |
633 | shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r |
edbb82f8 |
634 | \r |
635 | if (!(PicoOpt&0x200)) mp3_start_local();\r |
598e7c06 |
636 | }\r |
637 | \r |
638 | \r |
98c9d8d9 |
639 | int mp3_get_offset(void)\r |
640 | {\r |
641 | int offs1024 = 0;\r |
642 | int cdda_on;\r |
643 | \r |
7bc9cd7f |
644 | cdda_on = (PicoMCD & 1) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r |
edbb82f8 |
645 | (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r |
98c9d8d9 |
646 | \r |
647 | if (cdda_on) {\r |
648 | offs1024 = shared_ctl->mp3_offs << 7;\r |
649 | offs1024 /= shared_ctl->mp3_len;\r |
650 | offs1024 <<= 3;\r |
651 | }\r |
652 | printf("offs1024=%i (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r |
653 | \r |
654 | return offs1024;\r |
655 | }\r |
656 | \r |
657 | \r |