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distinguish VR SVP from 32X version
[picodrive.git] / platform / gp2x / 940ctl.c
CommitLineData
cff531af 1/*\r
2 * Code for communication with ARM940 and control of it.\r
3 * (C) notaz, 2006-2009\r
4 *\r
5 * This work is licensed under the terms of MAME license.\r
6 * See COPYING file in the top-level directory.\r
7 */\r
6cadc2da 8\r
cc68a136 9#include <stdio.h>\r
10#include <stdlib.h>\r
11#include <string.h>\r
12#include <unistd.h>\r
13#include <sys/mman.h>\r
14#include <sys/ioctl.h>\r
15#include <fcntl.h>\r
16#include <errno.h>\r
17\r
42c7b147 18#include "code940/940shared.h"\r
42171343 19#include "soc_mmsp2.h"\r
20#include "soc.h"\r
da42200b 21#include "../common/mp3.h"\r
e5f426aa 22#include "../common/arm_utils.h"\r
23#include "../common/menu.h"\r
ea8c405f 24#include "../common/emu.h"\r
cc41eb4f 25#include "../common/input.h"\r
efcba75f 26#include "../../pico/pico_int.h"\r
27#include "../../pico/sound/ym2612.h"\r
28#include "../../pico/sound/mix.h"\r
4f265db7 29\r
cc68a136 30static unsigned char *shared_mem = 0;\r
31static _940_data_t *shared_data = 0;\r
abe0ea43 32_940_ctl_t *shared_ctl = 0;\r
33unsigned char *mp3_mem = 0;\r
cb0316e4 34\r
e362c573 35#define MP3_SIZE_MAX (0x400000 + 0x800000) // 12M\r
e4fb433c 36#define CODE940_FILE "pico940_v3.bin"\r
cc68a136 37\r
38int crashed_940 = 0;\r
39\r
51a902ae 40static FILE *loaded_mp3 = 0;\r
cc68a136 41\r
42/***********************************************************/\r
43\r
44#define MAXOUT (+32767)\r
45#define MINOUT (-32768)\r
46\r
47/* limitter */\r
48#define Limit(val, max,min) { \\r
49 if ( val > max ) val = max; \\r
50 else if ( val < min ) val = min; \\r
51}\r
52\r
53/* these will be managed locally on our side */\r
cc68a136 54static UINT8 ST_address; /* address register */\r
4b9c5888 55static INT32 addr_A1; /* address line A1 */\r
cc68a136 56\r
57static int writebuff_ptr = 0;\r
58\r
59\r
cc68a136 60/* YM2612 write */\r
61/* a = address */\r
62/* v = value */\r
63/* returns 1 if sample affecting state changed */\r
4b9c5888 64int YM2612Write_940(unsigned int a, unsigned int v, int scanline)\r
cc68a136 65{\r
2433f409 66 int upd = 1; /* the write affects sample generation */\r
cc68a136 67\r
cc68a136 68 a &= 3;\r
69\r
2433f409 70 //printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r
71\r
e4fb433c 72 switch (a)\r
73 {\r
4b9c5888 74 case 0: /* address port 0 */\r
75 if (addr_A1 == 0 && ST_address == v)\r
76 return 0; /* address already selected, don't send this command to 940 */\r
77 ST_address = v;\r
78 addr_A1 = 0;\r
79 /* don't send DAC or timer related address changes to 940 */\r
80 if (v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a)\r
4ff2d527 81 return 0;\r
4b9c5888 82 upd = 0;\r
83 break;\r
cc68a136 84\r
4b9c5888 85 case 2: /* address port 1 */\r
86 if (addr_A1 == 1 && ST_address == v)\r
cc68a136 87 return 0;\r
4b9c5888 88 ST_address = v;\r
89 addr_A1 = 1;\r
90 upd = 0;\r
cc68a136 91 break;\r
cc68a136 92 }\r
93\r
2433f409 94 //printf("ym pass\n");\r
95\r
4b9c5888 96 if (currentConfig.EmuOpt & 4)\r
97 {\r
2433f409 98 UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r
99\r
100 /* detect rapid ym updates */\r
4b9c5888 101 if (upd && !(writebuff_ptr & 0x80000000) && scanline < 224)\r
102 {\r
2433f409 103 int mid = Pico.m.pal ? 68 : 93;\r
4b9c5888 104 if (scanline > mid) {\r
105 //printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, scanline);\r
2433f409 106 writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r
107 writebuff_ptr |= 0x80000000;\r
4b9c5888 108 //printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, scanline, addr, v, upd);\r
cc68a136 109 }\r
2433f409 110 }\r
111\r
112 /* queue this write for 940 */\r
113 if ((writebuff_ptr&0xffff) < 2047) {\r
114 writebuff[writebuff_ptr++ & 0xffff] = (a<<8)|v;\r
cc68a136 115 } else {\r
4ff2d527 116 printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r
cc68a136 117 }\r
118 }\r
119\r
120 return 0; // cause the engine to do updates once per frame only\r
121}\r
122\r
cc68a136 123\r
abe0ea43 124#define CHECK_BUSY(job) \\r
125 (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r
126\r
127static void wait_busy_940(int job)\r
cc68a136 128{\r
129 int i;\r
cc68a136 130\r
abe0ea43 131 job--;\r
132 for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r
42c7b147 133 spend_cycles(8*1024); // tested to be best for mp3 dec\r
cc68a136 134 if (i < 0x10000) return;\r
135\r
136 /* 940 crashed */\r
42c7b147 137 printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r
cc68a136 138 for (i = 0; i < 8; i++)\r
139 printf("%i ", shared_ctl->vstarts[i]);\r
140 printf(")\n");\r
abe0ea43 141 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
4f265db7 142 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
abe0ea43 143 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
4f265db7 144 printf("trying to interrupt..\n");\r
145 gp2x_memregs[0x3B3E>>1] = 0xffff;\r
abe0ea43 146 for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r
4f265db7 147 spend_cycles(8*1024);\r
148 printf("i = 0x%x\n", i);\r
abe0ea43 149 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
4f265db7 150 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
abe0ea43 151 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
4f265db7 152\r
c6c6c9cd 153 me_update_msg("940 crashed, too much overclock?");\r
cc68a136 154 engineState = PGS_Menu;\r
155 crashed_940 = 1;\r
cc68a136 156}\r
157\r
158\r
abe0ea43 159static void add_job_940(int job)\r
cc68a136 160{\r
abe0ea43 161 if (job <= 0 || job > 16) {\r
162 printf("add_job_940: bad job: %i\n", job);\r
163 return;\r
4f265db7 164 }\r
abe0ea43 165\r
166 // generate interrupt for this job\r
167 job--;\r
168 gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r
169\r
170// printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r
cc68a136 171}\r
172\r
173\r
174void YM2612PicoStateLoad_940(void)\r
175{\r
4b9c5888 176 UINT8 *REGS = YM2612GetRegs();\r
177\r
d5d11924 178 /* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r
179 add_job_940(JOB940_PICOSTATELOAD);\r
180 if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r
181\r
182 writebuff_ptr = 0;\r
4b9c5888 183 addr_A1 = *(INT32 *) (REGS + 0x200);\r
cc68a136 184}\r
185\r
e4fb433c 186void YM2612PicoStateSave2_940(int tat, int tbt)\r
187{\r
188 UINT8 *ym_remote_regs, *ym_local_regs;\r
189 add_job_940(JOB940_PICOSTATESAVE2);\r
190 if (CHECK_BUSY(JOB940_PICOSTATESAVE2)) wait_busy_940(JOB940_PICOSTATESAVE2);\r
191\r
192 ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
193 ym_local_regs = YM2612GetRegs();\r
194 if (*(UINT32 *)(ym_remote_regs + 0x100) != 0x41534d59) {\r
195 printf("code940 didn't return valid save data\n");\r
196 return;\r
197 }\r
198\r
199 /* copy addin data only */\r
200 memcpy(ym_local_regs, ym_remote_regs, 0x20);\r
201 memcpy(ym_local_regs + 0x100, ym_remote_regs + 0x100, 0x30);\r
202 memcpy(ym_local_regs + 0x0b8, ym_remote_regs + 0x0b8, 0x48);\r
203 memcpy(ym_local_regs + 0x1b8, ym_remote_regs + 0x1b8, 0x48);\r
204 *(INT32 *)(ym_local_regs + 0x108) = tat;\r
205 *(INT32 *)(ym_local_regs + 0x10c) = tbt;\r
206}\r
207\r
208int YM2612PicoStateLoad2_940(int *tat, int *tbt)\r
209{\r
210 UINT8 *ym_remote_regs, *ym_local_regs;\r
211 ym_local_regs = YM2612GetRegs();\r
212 ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
213\r
214 if (*(UINT32 *)(ym_local_regs + 0x100) != 0x41534d59)\r
215 return -1;\r
216\r
217 *tat = *(INT32 *)(ym_local_regs + 0x108);\r
218 *tbt = *(INT32 *)(ym_local_regs + 0x10c);\r
219\r
220 if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
221\r
222 /* flush writes */\r
223 if (shared_ctl->writebuffsel == 1) {\r
224 shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
225 } else {\r
226 shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
227 }\r
228 shared_ctl->writebuffsel ^= 1;\r
229 writebuff_ptr = 0;\r
230 add_job_940(JOB940_PICOSTATELOAD2_PREP);\r
231 if (CHECK_BUSY(JOB940_PICOSTATELOAD2_PREP)) wait_busy_940(JOB940_PICOSTATELOAD2_PREP);\r
232\r
233 memcpy(ym_remote_regs, ym_local_regs, 0x200);\r
234\r
235 add_job_940(JOB940_PICOSTATELOAD2);\r
236 if (CHECK_BUSY(JOB940_PICOSTATELOAD2)) wait_busy_940(JOB940_PICOSTATELOAD2);\r
237\r
238 return 0;\r
239}\r
240\r
cc68a136 241\r
242static void internal_reset(void)\r
243{\r
244 writebuff_ptr = 0;\r
4b9c5888 245 ST_address = addr_A1 = -1;\r
cc68a136 246}\r
247\r
248\r
f80d67e1 249/* this must be called after mmu hack, the allocated regions must not get cached */\r
0d9bf4fc 250void sharedmem940_init(void)\r
f80d67e1 251{\r
252 if (shared_mem != NULL) return;\r
253\r
254 shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r
e4fb433c 255 if (shared_mem == MAP_FAILED)\r
f80d67e1 256 {\r
257 printf("mmap(shared_data) failed with %i\n", errno);\r
258 exit(1);\r
259 }\r
260 shared_data = (_940_data_t *) (shared_mem+0x100000);\r
261 /* this area must not get buffered on either side */\r
262 shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r
e362c573 263 mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r
f80d67e1 264 if (mp3_mem == MAP_FAILED)\r
265 {\r
266 printf("mmap(mp3_mem) failed with %i\n", errno);\r
267 exit(1);\r
268 }\r
269 crashed_940 = 1;\r
270}\r
271\r
272\r
0d9bf4fc 273void sharedmem940_finish(void)\r
85f8e929 274{\r
275 munmap(shared_mem, 0x210000);\r
276 munmap(mp3_mem, MP3_SIZE_MAX);\r
277 shared_mem = mp3_mem = NULL;\r
278 shared_data = NULL;\r
279 shared_ctl = NULL;\r
280}\r
281\r
282\r
cc68a136 283void YM2612Init_940(int baseclock, int rate)\r
284{\r
285 printf("YM2612Init_940()\n");\r
b837b69b 286 printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r
cc68a136 287\r
42171343 288 reset940(1, 2);\r
289 pause940(1);\r
cc68a136 290\r
4f265db7 291 gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r
292 gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r
cc68a136 293\r
abe0ea43 294 gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r
295 gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r
296\r
297\r
cc68a136 298 if (crashed_940)\r
299 {\r
300 unsigned char ucData[1024];\r
cc41eb4f 301 int nRead, nLen = 0;\r
27701801 302 char binpath[512];\r
cc68a136 303 FILE *fp;\r
304\r
27701801 305 emu_make_path(binpath, CODE940_FILE, sizeof(binpath));\r
cc68a136 306 fp = fopen(binpath, "rb");\r
307 if(!fp)\r
308 {\r
e2de9939 309 memset(g_screen_ptr, 0, 320*240*2);\r
a12e0116 310 text_out16(10, 100, "failed to open required file:");\r
311 text_out16(10, 110, CODE940_FILE);\r
312 gp2x_video_flip2();\r
cc41eb4f 313 in_menu_wait(PBTN_MOK|PBTN_MBACK, 100);\r
cc68a136 314 printf("failed to open %s\n", binpath);\r
315 exit(1);\r
316 }\r
317\r
318 while(1)\r
319 {\r
320 nRead = fread(ucData, 1, 1024, fp);\r
321 if(nRead <= 0)\r
322 break;\r
323 memcpy(shared_mem + nLen, ucData, nRead);\r
324 nLen += nRead;\r
325 }\r
326 fclose(fp);\r
327 crashed_940 = 0;\r
328 }\r
329\r
330 memset(shared_data, 0, sizeof(*shared_data));\r
331 memset(shared_ctl, 0, sizeof(*shared_ctl));\r
332\r
5f8c85be 333 /* cause local ym2612 to init REGS */\r
334 YM2612Init_(baseclock, rate);\r
335\r
cc68a136 336 internal_reset();\r
337\r
51a902ae 338 loaded_mp3 = 0;\r
339\r
4f265db7 340 gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r
abe0ea43 341 gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r
342 gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r
cc68a136 343\r
344 /* start the 940 */\r
42171343 345 reset940(0, 2);\r
346 pause940(0);\r
cc68a136 347\r
348 // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r
abe0ea43 349\r
350 /* now cause 940 to init it's ym2612 stuff */\r
351 shared_ctl->baseclock = baseclock;\r
352 shared_ctl->rate = rate;\r
353 add_job_940(JOB940_INITALL);\r
cc68a136 354}\r
355\r
356\r
357void YM2612ResetChip_940(void)\r
358{\r
daec7253 359 //printf("YM2612ResetChip_940()\n");\r
cc68a136 360 if (shared_data == NULL) {\r
361 printf("YM2612ResetChip_940: reset before init?\n");\r
362 return;\r
363 }\r
364\r
4b9c5888 365 YM2612ResetChip_();\r
cc68a136 366 internal_reset();\r
367\r
abe0ea43 368 add_job_940(JOB940_YM2612RESETCHIP);\r
cc68a136 369}\r
370\r
371\r
abe0ea43 372int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r
cb0316e4 373{\r
abe0ea43 374 int *ym_buf = shared_data->ym_buffer;\r
85f8e929 375 int ym_active_chs;\r
4f265db7 376\r
abe0ea43 377 //printf("YM2612UpdateOne_940()\n");\r
378\r
379 if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
380\r
85f8e929 381 ym_active_chs = shared_ctl->ym_active_chs;\r
abe0ea43 382\r
85f8e929 383 // mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r
384 if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r
385 else memset32(buffer, 0, length<<stereo);\r
abe0ea43 386\r
387 if (shared_ctl->writebuffsel == 1) {\r
2433f409 388 shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
4f265db7 389 } else {\r
2433f409 390 shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
cb0316e4 391 }\r
abe0ea43 392 writebuff_ptr = 0;\r
393\r
394 /* predict sample counter for next frame */\r
395 if (PsndLen_exc_add) {\r
52250671 396 length = PsndLen;\r
397 if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length++;\r
abe0ea43 398 }\r
399\r
400 /* give 940 ym job */\r
401 shared_ctl->writebuffsel ^= 1;\r
402 shared_ctl->length = length;\r
403 shared_ctl->stereo = stereo;\r
404\r
405 add_job_940(JOB940_YM2612UPDATEONE);\r
406\r
85f8e929 407 return ym_active_chs;\r
cb0316e4 408}\r
cb0316e4 409\r
cb0316e4 410\r
7c34867a 411/***********************************************************/\r
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
cc68a136 419\r
7c34867a 420 if (!(PicoOpt & POPT_EXT_FM)) {\r
abe0ea43 421 mp3_update_local(buffer, length, stereo);\r
422 return;\r
423 }\r
cc68a136 424\r
7c34867a 425 // check if playback was started, track not ended\r
426 if (loaded_mp3 == NULL || shared_ctl->mp3_offs >= shared_ctl->mp3_len)\r
427 return;\r
428\r
abe0ea43 429 length_mp3 = length;\r
430 if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r
431 else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r
4f265db7 432\r
abe0ea43 433 /* do we have to wait? */\r
434 if (mp3_job_started && mp3_samples_ready < length_mp3) {\r
435 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
436 mp3_job_started = 0;\r
437 mp3_samples_ready += 1152;\r
438 }\r
cb0316e4 439\r
4f265db7 440 /* mix mp3 data, only stereo */\r
abe0ea43 441 if (mp3_samples_ready >= length_mp3)\r
cb0316e4 442 {\r
4f265db7 443 int shr = 0;\r
444 void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r
445 if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r
446 else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r
cb0316e4 447\r
4f265db7 448 if (1152 - mp3_buffer_offs >= length_mp3) {\r
abe0ea43 449 mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r
4f265db7 450\r
451 mp3_buffer_offs += length_mp3;\r
cb0316e4 452 } else {\r
abe0ea43 453 // collect samples from both buffers..\r
cb0316e4 454 int left = 1152 - mp3_buffer_offs;\r
4f265db7 455 if (mp3_play_bufsel == 0)\r
456 {\r
abe0ea43 457 mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r
4f265db7 458 mp3_buffer_offs = length_mp3 - left;\r
459 mp3_play_bufsel = 1;\r
460 } else {\r
461 mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r
462 mp3_buffer_offs = length_mp3 - left;\r
463 mix_samples(buffer + ((left>>shr)<<1),\r
464 shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r
465 mp3_play_bufsel = 0;\r
466 }\r
cc68a136 467 }\r
4f265db7 468 mp3_samples_ready -= length_mp3;\r
cc68a136 469 }\r
470\r
abe0ea43 471 // ask to decode more if we already can\r
472 if (!mp3_job_started)\r
cb0316e4 473 {\r
abe0ea43 474 mp3_job_started = 1;\r
cb0316e4 475 shared_ctl->mp3_buffsel ^= 1;\r
abe0ea43 476 add_job_940(JOB940_MP3DECODE);\r
cb0316e4 477 }\r
cc68a136 478}\r
cb0316e4 479\r
480\r
7c18e34a 481void mp3_start_play(void *f_, int pos) // pos is 0-1023\r
cb0316e4 482{\r
483 int byte_offs = 0;\r
7c18e34a 484 FILE *f = f_;\r
cb0316e4 485\r
7c34867a 486 if (!(PicoOpt & POPT_EN_MCD_CDDA) || f == NULL)\r
487 return;\r
488\r
489 if (!(PicoOpt & POPT_EXT_FM)) {\r
490 mp3_start_play_local(f, pos);\r
cb0316e4 491 return;\r
492 }\r
493\r
494 if (loaded_mp3 != f)\r
495 {\r
66fdc0f0 496 if (PicoMessage != NULL)\r
497 {\r
498 fseek(f, 0, SEEK_END);\r
499 if (ftell(f) > 2*1024*1024)\r
500 PicoMessage("Loading MP3...");\r
501 }\r
cb0316e4 502 fseek(f, 0, SEEK_SET);\r
503 fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r
e362c573 504 if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r
cb0316e4 505 shared_ctl->mp3_len = ftell(f);\r
506 loaded_mp3 = f;\r
abe0ea43 507\r
091facb8 508 if (PicoOpt & POPT_EXT_FM) {\r
abe0ea43 509 // as we are going to change 940's cacheable area, we must invalidate it's cache..\r
510 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
511 add_job_940(JOB940_INVALIDATE_DCACHE);\r
512 }\r
00bd648e 513 reset_timing = 1;\r
cb0316e4 514 }\r
515\r
516 // seek..\r
517 if (pos) {\r
518 byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r
519 byte_offs *= pos;\r
520 byte_offs >>= 6;\r
521 }\r
091facb8 522 printf(" mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r
cb0316e4 523\r
524 shared_ctl->mp3_offs = byte_offs;\r
51a902ae 525\r
abe0ea43 526 // reset buffer pointers and stuff..\r
51a902ae 527 mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r
abe0ea43 528 mp3_job_started = 0;\r
51a902ae 529 shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r
abe0ea43 530\r
7c34867a 531 add_job_940(JOB940_MP3RESET);\r
532 if (CHECK_BUSY(JOB940_MP3RESET)) wait_busy_940(JOB940_MP3RESET);\r
75736070 533}\r
534\r
fast MegaDrive/MegaCD/32X emulator