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refactoring for Wiz port; random cleanups
[picodrive.git] / platform / gp2x / 940ctl.c
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6cadc2da 1// Code for communication with ARM940 and control of it.\r
2// (c) Copyright 2007, Grazvydas "notaz" Ignotas\r
3\r
cc68a136 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
42c7b147 13#include "code940/940shared.h"\r
42171343 14#include "soc_mmsp2.h"\r
15#include "soc.h"\r
cc68a136 16#include "emu.h"\r
da42200b 17#include "../common/mp3.h"\r
e5f426aa 18#include "../common/arm_utils.h"\r
19#include "../common/menu.h"\r
ea8c405f 20#include "../common/emu.h"\r
efcba75f 21#include "../../pico/pico_int.h"\r
22#include "../../pico/sound/ym2612.h"\r
23#include "../../pico/sound/mix.h"\r
4f265db7 24\r
00bd648e 25extern int reset_timing;\r
cc68a136 26static unsigned char *shared_mem = 0;\r
27static _940_data_t *shared_data = 0;\r
abe0ea43 28_940_ctl_t *shared_ctl = 0;\r
29unsigned char *mp3_mem = 0;\r
cb0316e4 30\r
e362c573 31#define MP3_SIZE_MAX (0x400000 + 0x800000) // 12M\r
e4fb433c 32#define CODE940_FILE "pico940_v3.bin"\r
cc68a136 33\r
34int crashed_940 = 0;\r
35\r
51a902ae 36static FILE *loaded_mp3 = 0;\r
cc68a136 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
cc68a136 50static UINT8 ST_address; /* address register */\r
4b9c5888 51static INT32 addr_A1; /* address line A1 */\r
cc68a136 52\r
53static int writebuff_ptr = 0;\r
54\r
55\r
cc68a136 56/* YM2612 write */\r
57/* a = address */\r
58/* v = value */\r
59/* returns 1 if sample affecting state changed */\r
4b9c5888 60int YM2612Write_940(unsigned int a, unsigned int v, int scanline)\r
cc68a136 61{\r
2433f409 62 int upd = 1; /* the write affects sample generation */\r
cc68a136 63\r
cc68a136 64 a &= 3;\r
65\r
2433f409 66 //printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r
67\r
e4fb433c 68 switch (a)\r
69 {\r
4b9c5888 70 case 0: /* address port 0 */\r
71 if (addr_A1 == 0 && ST_address == v)\r
72 return 0; /* address already selected, don't send this command to 940 */\r
73 ST_address = v;\r
74 addr_A1 = 0;\r
75 /* don't send DAC or timer related address changes to 940 */\r
76 if (v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a)\r
4ff2d527 77 return 0;\r
4b9c5888 78 upd = 0;\r
79 break;\r
cc68a136 80\r
4b9c5888 81 case 2: /* address port 1 */\r
82 if (addr_A1 == 1 && ST_address == v)\r
cc68a136 83 return 0;\r
4b9c5888 84 ST_address = v;\r
85 addr_A1 = 1;\r
86 upd = 0;\r
cc68a136 87 break;\r
cc68a136 88 }\r
89\r
2433f409 90 //printf("ym pass\n");\r
91\r
4b9c5888 92 if (currentConfig.EmuOpt & 4)\r
93 {\r
2433f409 94 UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r
95\r
96 /* detect rapid ym updates */\r
4b9c5888 97 if (upd && !(writebuff_ptr & 0x80000000) && scanline < 224)\r
98 {\r
2433f409 99 int mid = Pico.m.pal ? 68 : 93;\r
4b9c5888 100 if (scanline > mid) {\r
101 //printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, scanline);\r
2433f409 102 writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r
103 writebuff_ptr |= 0x80000000;\r
4b9c5888 104 //printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, scanline, addr, v, upd);\r
cc68a136 105 }\r
2433f409 106 }\r
107\r
108 /* queue this write for 940 */\r
109 if ((writebuff_ptr&0xffff) < 2047) {\r
110 writebuff[writebuff_ptr++ & 0xffff] = (a<<8)|v;\r
cc68a136 111 } else {\r
4ff2d527 112 printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r
cc68a136 113 }\r
114 }\r
115\r
116 return 0; // cause the engine to do updates once per frame only\r
117}\r
118\r
cc68a136 119\r
abe0ea43 120#define CHECK_BUSY(job) \\r
121 (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r
122\r
123static void wait_busy_940(int job)\r
cc68a136 124{\r
125 int i;\r
cc68a136 126\r
abe0ea43 127 job--;\r
128 for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r
42c7b147 129 spend_cycles(8*1024); // tested to be best for mp3 dec\r
cc68a136 130 if (i < 0x10000) return;\r
131\r
132 /* 940 crashed */\r
42c7b147 133 printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r
cc68a136 134 for (i = 0; i < 8; i++)\r
135 printf("%i ", shared_ctl->vstarts[i]);\r
136 printf(")\n");\r
abe0ea43 137 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
4f265db7 138 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
abe0ea43 139 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
4f265db7 140 printf("trying to interrupt..\n");\r
141 gp2x_memregs[0x3B3E>>1] = 0xffff;\r
abe0ea43 142 for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r
4f265db7 143 spend_cycles(8*1024);\r
144 printf("i = 0x%x\n", i);\r
abe0ea43 145 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
4f265db7 146 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
abe0ea43 147 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
4f265db7 148\r
c6c6c9cd 149 me_update_msg("940 crashed, too much overclock?");\r
cc68a136 150 engineState = PGS_Menu;\r
151 crashed_940 = 1;\r
cc68a136 152}\r
153\r
154\r
abe0ea43 155static void add_job_940(int job)\r
cc68a136 156{\r
abe0ea43 157 if (job <= 0 || job > 16) {\r
158 printf("add_job_940: bad job: %i\n", job);\r
159 return;\r
4f265db7 160 }\r
abe0ea43 161\r
162 // generate interrupt for this job\r
163 job--;\r
164 gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r
165\r
166// printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r
cc68a136 167}\r
168\r
169\r
170void YM2612PicoStateLoad_940(void)\r
171{\r
4b9c5888 172 UINT8 *REGS = YM2612GetRegs();\r
173\r
d5d11924 174 /* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r
175 add_job_940(JOB940_PICOSTATELOAD);\r
176 if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r
177\r
178 writebuff_ptr = 0;\r
4b9c5888 179 addr_A1 = *(INT32 *) (REGS + 0x200);\r
cc68a136 180}\r
181\r
e4fb433c 182void YM2612PicoStateSave2_940(int tat, int tbt)\r
183{\r
184 UINT8 *ym_remote_regs, *ym_local_regs;\r
185 add_job_940(JOB940_PICOSTATESAVE2);\r
186 if (CHECK_BUSY(JOB940_PICOSTATESAVE2)) wait_busy_940(JOB940_PICOSTATESAVE2);\r
187\r
188 ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
189 ym_local_regs = YM2612GetRegs();\r
190 if (*(UINT32 *)(ym_remote_regs + 0x100) != 0x41534d59) {\r
191 printf("code940 didn't return valid save data\n");\r
192 return;\r
193 }\r
194\r
195 /* copy addin data only */\r
196 memcpy(ym_local_regs, ym_remote_regs, 0x20);\r
197 memcpy(ym_local_regs + 0x100, ym_remote_regs + 0x100, 0x30);\r
198 memcpy(ym_local_regs + 0x0b8, ym_remote_regs + 0x0b8, 0x48);\r
199 memcpy(ym_local_regs + 0x1b8, ym_remote_regs + 0x1b8, 0x48);\r
200 *(INT32 *)(ym_local_regs + 0x108) = tat;\r
201 *(INT32 *)(ym_local_regs + 0x10c) = tbt;\r
202}\r
203\r
204int YM2612PicoStateLoad2_940(int *tat, int *tbt)\r
205{\r
206 UINT8 *ym_remote_regs, *ym_local_regs;\r
207 ym_local_regs = YM2612GetRegs();\r
208 ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
209\r
210 if (*(UINT32 *)(ym_local_regs + 0x100) != 0x41534d59)\r
211 return -1;\r
212\r
213 *tat = *(INT32 *)(ym_local_regs + 0x108);\r
214 *tbt = *(INT32 *)(ym_local_regs + 0x10c);\r
215\r
216 if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
217\r
218 /* flush writes */\r
219 if (shared_ctl->writebuffsel == 1) {\r
220 shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
221 } else {\r
222 shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
223 }\r
224 shared_ctl->writebuffsel ^= 1;\r
225 writebuff_ptr = 0;\r
226 add_job_940(JOB940_PICOSTATELOAD2_PREP);\r
227 if (CHECK_BUSY(JOB940_PICOSTATELOAD2_PREP)) wait_busy_940(JOB940_PICOSTATELOAD2_PREP);\r
228\r
229 memcpy(ym_remote_regs, ym_local_regs, 0x200);\r
230\r
231 add_job_940(JOB940_PICOSTATELOAD2);\r
232 if (CHECK_BUSY(JOB940_PICOSTATELOAD2)) wait_busy_940(JOB940_PICOSTATELOAD2);\r
233\r
234 return 0;\r
235}\r
236\r
cc68a136 237\r
238static void internal_reset(void)\r
239{\r
240 writebuff_ptr = 0;\r
4b9c5888 241 ST_address = addr_A1 = -1;\r
cc68a136 242}\r
243\r
244\r
f80d67e1 245/* this must be called after mmu hack, the allocated regions must not get cached */\r
246void sharedmem_init(void)\r
247{\r
248 if (shared_mem != NULL) return;\r
249\r
250 shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r
e4fb433c 251 if (shared_mem == MAP_FAILED)\r
f80d67e1 252 {\r
253 printf("mmap(shared_data) failed with %i\n", errno);\r
254 exit(1);\r
255 }\r
256 shared_data = (_940_data_t *) (shared_mem+0x100000);\r
257 /* this area must not get buffered on either side */\r
258 shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r
e362c573 259 mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r
f80d67e1 260 if (mp3_mem == MAP_FAILED)\r
261 {\r
262 printf("mmap(mp3_mem) failed with %i\n", errno);\r
263 exit(1);\r
264 }\r
265 crashed_940 = 1;\r
266}\r
267\r
268\r
85f8e929 269void sharedmem_deinit(void)\r
270{\r
271 munmap(shared_mem, 0x210000);\r
272 munmap(mp3_mem, MP3_SIZE_MAX);\r
273 shared_mem = mp3_mem = NULL;\r
274 shared_data = NULL;\r
275 shared_ctl = NULL;\r
276}\r
277\r
278\r
cc68a136 279extern char **g_argv;\r
280\r
cc68a136 281void YM2612Init_940(int baseclock, int rate)\r
282{\r
283 printf("YM2612Init_940()\n");\r
b837b69b 284 printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r
cc68a136 285\r
42171343 286 reset940(1, 2);\r
287 pause940(1);\r
cc68a136 288\r
4f265db7 289 gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r
290 gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r
cc68a136 291\r
abe0ea43 292 gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r
293 gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r
294\r
295\r
cc68a136 296 if (crashed_940)\r
297 {\r
298 unsigned char ucData[1024];\r
299 int nRead, i, nLen = 0;\r
300 char binpath[1024];\r
301 FILE *fp;\r
302\r
303 strncpy(binpath, g_argv[0], 1023);\r
304 binpath[1023] = 0;\r
305 for (i = strlen(binpath); i > 0; i--)\r
306 if (binpath[i] == '/') { binpath[i] = 0; break; }\r
d524c827 307 strcat(binpath, "/" CODE940_FILE);\r
cc68a136 308\r
309 fp = fopen(binpath, "rb");\r
310 if(!fp)\r
311 {\r
e2de9939 312 memset(g_screen_ptr, 0, 320*240*2);\r
a12e0116 313 text_out16(10, 100, "failed to open required file:");\r
314 text_out16(10, 110, CODE940_FILE);\r
315 gp2x_video_flip2();\r
cc68a136 316 printf("failed to open %s\n", binpath);\r
317 exit(1);\r
318 }\r
319\r
320 while(1)\r
321 {\r
322 nRead = fread(ucData, 1, 1024, fp);\r
323 if(nRead <= 0)\r
324 break;\r
325 memcpy(shared_mem + nLen, ucData, nRead);\r
326 nLen += nRead;\r
327 }\r
328 fclose(fp);\r
329 crashed_940 = 0;\r
330 }\r
331\r
332 memset(shared_data, 0, sizeof(*shared_data));\r
333 memset(shared_ctl, 0, sizeof(*shared_ctl));\r
334\r
5f8c85be 335 /* cause local ym2612 to init REGS */\r
336 YM2612Init_(baseclock, rate);\r
337\r
cc68a136 338 internal_reset();\r
339\r
51a902ae 340 loaded_mp3 = 0;\r
341\r
4f265db7 342 gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r
abe0ea43 343 gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r
344 gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r
cc68a136 345\r
346 /* start the 940 */\r
42171343 347 reset940(0, 2);\r
348 pause940(0);\r
cc68a136 349\r
350 // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r
abe0ea43 351\r
352 /* now cause 940 to init it's ym2612 stuff */\r
353 shared_ctl->baseclock = baseclock;\r
354 shared_ctl->rate = rate;\r
355 add_job_940(JOB940_INITALL);\r
cc68a136 356}\r
357\r
358\r
359void YM2612ResetChip_940(void)\r
360{\r
daec7253 361 //printf("YM2612ResetChip_940()\n");\r
cc68a136 362 if (shared_data == NULL) {\r
363 printf("YM2612ResetChip_940: reset before init?\n");\r
364 return;\r
365 }\r
366\r
4b9c5888 367 YM2612ResetChip_();\r
cc68a136 368 internal_reset();\r
369\r
abe0ea43 370 add_job_940(JOB940_YM2612RESETCHIP);\r
cc68a136 371}\r
372\r
373\r
abe0ea43 374int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r
cb0316e4 375{\r
abe0ea43 376 int *ym_buf = shared_data->ym_buffer;\r
85f8e929 377 int ym_active_chs;\r
4f265db7 378\r
abe0ea43 379 //printf("YM2612UpdateOne_940()\n");\r
380\r
381 if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
382\r
85f8e929 383 ym_active_chs = shared_ctl->ym_active_chs;\r
abe0ea43 384\r
85f8e929 385 // mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r
386 if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r
387 else memset32(buffer, 0, length<<stereo);\r
abe0ea43 388\r
389 if (shared_ctl->writebuffsel == 1) {\r
2433f409 390 shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
4f265db7 391 } else {\r
2433f409 392 shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
cb0316e4 393 }\r
abe0ea43 394 writebuff_ptr = 0;\r
395\r
396 /* predict sample counter for next frame */\r
397 if (PsndLen_exc_add) {\r
52250671 398 length = PsndLen;\r
399 if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length++;\r
abe0ea43 400 }\r
401\r
402 /* give 940 ym job */\r
403 shared_ctl->writebuffsel ^= 1;\r
404 shared_ctl->length = length;\r
405 shared_ctl->stereo = stereo;\r
406\r
407 add_job_940(JOB940_YM2612UPDATEONE);\r
408\r
85f8e929 409 return ym_active_chs;\r
cb0316e4 410}\r
cb0316e4 411\r
cb0316e4 412\r
51a902ae 413static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r
abe0ea43 414static int mp3_play_bufsel = 0, mp3_job_started = 0;\r
cb0316e4 415\r
abe0ea43 416void mp3_update(int *buffer, int length, int stereo)\r
cc68a136 417{\r
abe0ea43 418 int length_mp3;\r
419 int cdda_on;\r
4f265db7 420\r
da42200b 421 // playback was started, track not ended\r
422 cdda_on = loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r
cc68a136 423\r
abe0ea43 424 if (!cdda_on) return;\r
cc68a136 425\r
abe0ea43 426 if (!(PicoOpt&0x200)) {\r
427 mp3_update_local(buffer, length, stereo);\r
428 return;\r
429 }\r
cc68a136 430\r
abe0ea43 431 length_mp3 = length;\r
432 if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r
433 else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r
4f265db7 434\r
abe0ea43 435 /* do we have to wait? */\r
436 if (mp3_job_started && mp3_samples_ready < length_mp3) {\r
437 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
438 mp3_job_started = 0;\r
439 mp3_samples_ready += 1152;\r
440 }\r
cb0316e4 441\r
4f265db7 442 /* mix mp3 data, only stereo */\r
abe0ea43 443 if (mp3_samples_ready >= length_mp3)\r
cb0316e4 444 {\r
4f265db7 445 int shr = 0;\r
446 void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r
447 if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r
448 else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r
cb0316e4 449\r
4f265db7 450 if (1152 - mp3_buffer_offs >= length_mp3) {\r
abe0ea43 451 mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r
4f265db7 452\r
453 mp3_buffer_offs += length_mp3;\r
cb0316e4 454 } else {\r
abe0ea43 455 // collect samples from both buffers..\r
cb0316e4 456 int left = 1152 - mp3_buffer_offs;\r
4f265db7 457 if (mp3_play_bufsel == 0)\r
458 {\r
abe0ea43 459 mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r
4f265db7 460 mp3_buffer_offs = length_mp3 - left;\r
461 mp3_play_bufsel = 1;\r
462 } else {\r
463 mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r
464 mp3_buffer_offs = length_mp3 - left;\r
465 mix_samples(buffer + ((left>>shr)<<1),\r
466 shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r
467 mp3_play_bufsel = 0;\r
468 }\r
cc68a136 469 }\r
4f265db7 470 mp3_samples_ready -= length_mp3;\r
cc68a136 471 }\r
472\r
abe0ea43 473 // ask to decode more if we already can\r
474 if (!mp3_job_started)\r
cb0316e4 475 {\r
abe0ea43 476 mp3_job_started = 1;\r
cb0316e4 477 shared_ctl->mp3_buffsel ^= 1;\r
abe0ea43 478 add_job_940(JOB940_MP3DECODE);\r
cb0316e4 479 }\r
cc68a136 480}\r
cb0316e4 481\r
482\r
483/***********************************************************/\r
484\r
485void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r
486{\r
487 int byte_offs = 0;\r
488\r
1cd356a3 489 if (!(PicoOpt&0x800)) { // cdda disabled?\r
cb0316e4 490 return;\r
491 }\r
492\r
493 if (loaded_mp3 != f)\r
494 {\r
66fdc0f0 495 if (PicoMessage != NULL)\r
496 {\r
497 fseek(f, 0, SEEK_END);\r
498 if (ftell(f) > 2*1024*1024)\r
499 PicoMessage("Loading MP3...");\r
500 }\r
cb0316e4 501 fseek(f, 0, SEEK_SET);\r
502 fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r
e362c573 503 if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r
cb0316e4 504 shared_ctl->mp3_len = ftell(f);\r
505 loaded_mp3 = f;\r
abe0ea43 506\r
091facb8 507 if (PicoOpt & POPT_EXT_FM) {\r
abe0ea43 508 // as we are going to change 940's cacheable area, we must invalidate it's cache..\r
509 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
510 add_job_940(JOB940_INVALIDATE_DCACHE);\r
511 }\r
00bd648e 512 reset_timing = 1;\r
cb0316e4 513 }\r
514\r
515 // seek..\r
516 if (pos) {\r
517 byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r
518 byte_offs *= pos;\r
519 byte_offs >>= 6;\r
520 }\r
091facb8 521 printf(" mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r
cb0316e4 522\r
523 shared_ctl->mp3_offs = byte_offs;\r
51a902ae 524\r
abe0ea43 525 // reset buffer pointers and stuff..\r
51a902ae 526 mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r
abe0ea43 527 mp3_job_started = 0;\r
51a902ae 528 shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r
abe0ea43 529\r
091facb8 530 if (PicoOpt & POPT_EXT_FM)\r
531 {\r
532 add_job_940(JOB940_MP3RESET);\r
533 if (CHECK_BUSY(JOB940_MP3RESET)) wait_busy_940(JOB940_MP3RESET);\r
534 }\r
535 else\r
536 mp3_start_local();\r
cb0316e4 537}\r
538\r
539\r
75736070 540int mp3_get_offset(void)\r
541{\r
da42200b 542 unsigned int offs1024 = 0;\r
75736070 543 int cdda_on;\r
544\r
602133e1 545 cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r
abe0ea43 546 (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r
75736070 547\r
548 if (cdda_on) {\r
549 offs1024 = shared_ctl->mp3_offs << 7;\r
da42200b 550 offs1024 /= shared_ctl->mp3_len >> 3;\r
75736070 551 }\r
da42200b 552 printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r
75736070 553\r
554 return offs1024;\r
555}\r
556\r
557\r
fast MegaDrive/MegaCD/32X emulator