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 |
cc68a136 |
14 | #include "gp2x.h"\r |
15 | #include "emu.h"\r |
16 | #include "menu.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 |
cb0316e4 |
21 | #include "../../Pico/PicoInt.h"\r |
5f8c85be |
22 | #include "../../Pico/sound/ym2612.h"\r |
4f265db7 |
23 | #include "../../Pico/sound/mix.h"\r |
24 | \r |
cc68a136 |
25 | /* we will need some gp2x internals here */\r |
26 | extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */\r |
27 | extern volatile unsigned long *gp2x_memregl;\r |
28 | \r |
00bd648e |
29 | extern int reset_timing;\r |
cc68a136 |
30 | static unsigned char *shared_mem = 0;\r |
31 | static _940_data_t *shared_data = 0;\r |
abe0ea43 |
32 | _940_ctl_t *shared_ctl = 0;\r |
33 | unsigned char *mp3_mem = 0;\r |
cb0316e4 |
34 | \r |
e362c573 |
35 | #define MP3_SIZE_MAX (0x400000 + 0x800000) // 12M\r |
8f8fe01e |
36 | #define CODE940_FILE "pico940_v2.bin"\r |
cc68a136 |
37 | \r |
38 | int crashed_940 = 0;\r |
39 | \r |
51a902ae |
40 | static 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 |
54 | static UINT8 ST_address; /* address register */\r |
4b9c5888 |
55 | static INT32 addr_A1; /* address line A1 */\r |
cc68a136 |
56 | \r |
57 | static 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 |
64 | int 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 |
4b9c5888 |
72 | switch (a) {\r |
73 | case 0: /* address port 0 */\r |
74 | if (addr_A1 == 0 && ST_address == v)\r |
75 | return 0; /* address already selected, don't send this command to 940 */\r |
76 | ST_address = v;\r |
77 | addr_A1 = 0;\r |
78 | /* don't send DAC or timer related address changes to 940 */\r |
79 | if (v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a)\r |
4ff2d527 |
80 | return 0;\r |
4b9c5888 |
81 | upd = 0;\r |
82 | break;\r |
cc68a136 |
83 | \r |
4b9c5888 |
84 | case 1: /* data port 0 */\r |
85 | if (ST_address == 0x2b) upd = 0; /* DAC sel */\r |
86 | break;\r |
cc68a136 |
87 | \r |
4b9c5888 |
88 | case 2: /* address port 1 */\r |
89 | if (addr_A1 == 1 && ST_address == v)\r |
cc68a136 |
90 | return 0;\r |
4b9c5888 |
91 | ST_address = v;\r |
92 | addr_A1 = 1;\r |
93 | upd = 0;\r |
cc68a136 |
94 | break;\r |
cc68a136 |
95 | }\r |
96 | \r |
2433f409 |
97 | //printf("ym pass\n");\r |
98 | \r |
4b9c5888 |
99 | if (currentConfig.EmuOpt & 4)\r |
100 | {\r |
2433f409 |
101 | UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r |
102 | \r |
103 | /* detect rapid ym updates */\r |
4b9c5888 |
104 | if (upd && !(writebuff_ptr & 0x80000000) && scanline < 224)\r |
105 | {\r |
2433f409 |
106 | int mid = Pico.m.pal ? 68 : 93;\r |
4b9c5888 |
107 | if (scanline > mid) {\r |
108 | //printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, scanline);\r |
2433f409 |
109 | writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r |
110 | writebuff_ptr |= 0x80000000;\r |
4b9c5888 |
111 | //printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, scanline, addr, v, upd);\r |
cc68a136 |
112 | }\r |
2433f409 |
113 | }\r |
114 | \r |
115 | /* queue this write for 940 */\r |
116 | if ((writebuff_ptr&0xffff) < 2047) {\r |
117 | writebuff[writebuff_ptr++ & 0xffff] = (a<<8)|v;\r |
cc68a136 |
118 | } else {\r |
4ff2d527 |
119 | printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r |
cc68a136 |
120 | }\r |
121 | }\r |
122 | \r |
123 | return 0; // cause the engine to do updates once per frame only\r |
124 | }\r |
125 | \r |
cc68a136 |
126 | \r |
abe0ea43 |
127 | #define CHECK_BUSY(job) \\r |
128 | (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r |
129 | \r |
130 | static void wait_busy_940(int job)\r |
cc68a136 |
131 | {\r |
132 | int i;\r |
cc68a136 |
133 | \r |
abe0ea43 |
134 | job--;\r |
135 | for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r |
42c7b147 |
136 | spend_cycles(8*1024); // tested to be best for mp3 dec\r |
cc68a136 |
137 | if (i < 0x10000) return;\r |
138 | \r |
139 | /* 940 crashed */\r |
42c7b147 |
140 | printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r |
cc68a136 |
141 | for (i = 0; i < 8; i++)\r |
142 | printf("%i ", shared_ctl->vstarts[i]);\r |
143 | printf(")\n");\r |
abe0ea43 |
144 | printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r |
4f265db7 |
145 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
abe0ea43 |
146 | printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r |
4f265db7 |
147 | printf("trying to interrupt..\n");\r |
148 | gp2x_memregs[0x3B3E>>1] = 0xffff;\r |
abe0ea43 |
149 | for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r |
4f265db7 |
150 | spend_cycles(8*1024);\r |
151 | printf("i = 0x%x\n", i);\r |
abe0ea43 |
152 | printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r |
4f265db7 |
153 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
abe0ea43 |
154 | printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r |
4f265db7 |
155 | \r |
6cadc2da |
156 | strcpy(menuErrorMsg, "940 crashed, too much overclock?");\r |
cc68a136 |
157 | engineState = PGS_Menu;\r |
158 | crashed_940 = 1;\r |
cc68a136 |
159 | }\r |
160 | \r |
161 | \r |
abe0ea43 |
162 | static void add_job_940(int job)\r |
cc68a136 |
163 | {\r |
abe0ea43 |
164 | if (job <= 0 || job > 16) {\r |
165 | printf("add_job_940: bad job: %i\n", job);\r |
166 | return;\r |
4f265db7 |
167 | }\r |
abe0ea43 |
168 | \r |
169 | // generate interrupt for this job\r |
170 | job--;\r |
171 | gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r |
172 | \r |
173 | // printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r |
cc68a136 |
174 | }\r |
175 | \r |
176 | \r |
177 | void YM2612PicoStateLoad_940(void)\r |
178 | {\r |
4b9c5888 |
179 | UINT8 *REGS = YM2612GetRegs();\r |
180 | \r |
181 | int i;\r |
cc68a136 |
182 | \r |
d5d11924 |
183 | /* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r |
184 | add_job_940(JOB940_PICOSTATELOAD);\r |
185 | if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r |
186 | \r |
187 | writebuff_ptr = 0;\r |
188 | \r |
cc68a136 |
189 | // feed all the registers and update internal state\r |
190 | for(i = 0; i < 0x100; i++) {\r |
4b9c5888 |
191 | YM2612Write_940(0, i, -1);\r |
192 | YM2612Write_940(1, REGS[i], -1);\r |
cc68a136 |
193 | }\r |
194 | for(i = 0; i < 0x100; i++) {\r |
4b9c5888 |
195 | YM2612Write_940(2, i, -1);\r |
196 | YM2612Write_940(3, REGS[i|0x100], -1);\r |
cc68a136 |
197 | }\r |
198 | \r |
4b9c5888 |
199 | addr_A1 = *(INT32 *) (REGS + 0x200);\r |
cc68a136 |
200 | }\r |
201 | \r |
202 | \r |
203 | static void internal_reset(void)\r |
204 | {\r |
205 | writebuff_ptr = 0;\r |
4b9c5888 |
206 | ST_address = addr_A1 = -1;\r |
cc68a136 |
207 | }\r |
208 | \r |
209 | \r |
f80d67e1 |
210 | /* this must be called after mmu hack, the allocated regions must not get cached */\r |
211 | void sharedmem_init(void)\r |
212 | {\r |
213 | if (shared_mem != NULL) return;\r |
214 | \r |
215 | shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r |
216 | if(shared_mem == MAP_FAILED)\r |
217 | {\r |
218 | printf("mmap(shared_data) failed with %i\n", errno);\r |
219 | exit(1);\r |
220 | }\r |
221 | shared_data = (_940_data_t *) (shared_mem+0x100000);\r |
222 | /* this area must not get buffered on either side */\r |
223 | shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r |
e362c573 |
224 | mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r |
f80d67e1 |
225 | if (mp3_mem == MAP_FAILED)\r |
226 | {\r |
227 | printf("mmap(mp3_mem) failed with %i\n", errno);\r |
228 | exit(1);\r |
229 | }\r |
230 | crashed_940 = 1;\r |
231 | }\r |
232 | \r |
233 | \r |
85f8e929 |
234 | void sharedmem_deinit(void)\r |
235 | {\r |
236 | munmap(shared_mem, 0x210000);\r |
237 | munmap(mp3_mem, MP3_SIZE_MAX);\r |
238 | shared_mem = mp3_mem = NULL;\r |
239 | shared_data = NULL;\r |
240 | shared_ctl = NULL;\r |
241 | }\r |
242 | \r |
243 | \r |
cc68a136 |
244 | extern char **g_argv;\r |
245 | \r |
246 | /* none of the functions in this file should be called before this one */\r |
247 | void YM2612Init_940(int baseclock, int rate)\r |
248 | {\r |
249 | printf("YM2612Init_940()\n");\r |
b837b69b |
250 | printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r |
cc68a136 |
251 | \r |
b837b69b |
252 | Reset940(1, 2);\r |
cc68a136 |
253 | Pause940(1);\r |
254 | \r |
4f265db7 |
255 | gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r |
256 | gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r |
cc68a136 |
257 | \r |
abe0ea43 |
258 | gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r |
259 | gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r |
260 | \r |
261 | \r |
cc68a136 |
262 | if (crashed_940)\r |
263 | {\r |
264 | unsigned char ucData[1024];\r |
265 | int nRead, i, nLen = 0;\r |
266 | char binpath[1024];\r |
267 | FILE *fp;\r |
268 | \r |
269 | strncpy(binpath, g_argv[0], 1023);\r |
270 | binpath[1023] = 0;\r |
271 | for (i = strlen(binpath); i > 0; i--)\r |
272 | if (binpath[i] == '/') { binpath[i] = 0; break; }\r |
d524c827 |
273 | strcat(binpath, "/" CODE940_FILE);\r |
cc68a136 |
274 | \r |
275 | fp = fopen(binpath, "rb");\r |
276 | if(!fp)\r |
277 | {\r |
a12e0116 |
278 | memset(gp2x_screen, 0, 320*240*2);\r |
279 | text_out16(10, 100, "failed to open required file:");\r |
280 | text_out16(10, 110, CODE940_FILE);\r |
281 | gp2x_video_flip2();\r |
cc68a136 |
282 | printf("failed to open %s\n", binpath);\r |
283 | exit(1);\r |
284 | }\r |
285 | \r |
286 | while(1)\r |
287 | {\r |
288 | nRead = fread(ucData, 1, 1024, fp);\r |
289 | if(nRead <= 0)\r |
290 | break;\r |
291 | memcpy(shared_mem + nLen, ucData, nRead);\r |
292 | nLen += nRead;\r |
293 | }\r |
294 | fclose(fp);\r |
295 | crashed_940 = 0;\r |
296 | }\r |
297 | \r |
298 | memset(shared_data, 0, sizeof(*shared_data));\r |
299 | memset(shared_ctl, 0, sizeof(*shared_ctl));\r |
300 | \r |
5f8c85be |
301 | /* cause local ym2612 to init REGS */\r |
302 | YM2612Init_(baseclock, rate);\r |
303 | \r |
cc68a136 |
304 | internal_reset();\r |
305 | \r |
51a902ae |
306 | loaded_mp3 = 0;\r |
307 | \r |
4f265db7 |
308 | gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r |
abe0ea43 |
309 | gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r |
310 | gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r |
cc68a136 |
311 | \r |
312 | /* start the 940 */\r |
b837b69b |
313 | Reset940(0, 2);\r |
cc68a136 |
314 | Pause940(0);\r |
315 | \r |
316 | // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r |
abe0ea43 |
317 | \r |
318 | /* now cause 940 to init it's ym2612 stuff */\r |
319 | shared_ctl->baseclock = baseclock;\r |
320 | shared_ctl->rate = rate;\r |
321 | add_job_940(JOB940_INITALL);\r |
cc68a136 |
322 | }\r |
323 | \r |
324 | \r |
325 | void YM2612ResetChip_940(void)\r |
326 | {\r |
daec7253 |
327 | //printf("YM2612ResetChip_940()\n");\r |
cc68a136 |
328 | if (shared_data == NULL) {\r |
329 | printf("YM2612ResetChip_940: reset before init?\n");\r |
330 | return;\r |
331 | }\r |
332 | \r |
4b9c5888 |
333 | YM2612ResetChip_();\r |
cc68a136 |
334 | internal_reset();\r |
335 | \r |
abe0ea43 |
336 | add_job_940(JOB940_YM2612RESETCHIP);\r |
cc68a136 |
337 | }\r |
338 | \r |
339 | \r |
abe0ea43 |
340 | int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r |
cb0316e4 |
341 | {\r |
abe0ea43 |
342 | int *ym_buf = shared_data->ym_buffer;\r |
85f8e929 |
343 | int ym_active_chs;\r |
4f265db7 |
344 | \r |
abe0ea43 |
345 | //printf("YM2612UpdateOne_940()\n");\r |
346 | \r |
347 | if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r |
348 | \r |
85f8e929 |
349 | ym_active_chs = shared_ctl->ym_active_chs;\r |
abe0ea43 |
350 | \r |
85f8e929 |
351 | // mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r |
352 | if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r |
353 | else memset32(buffer, 0, length<<stereo);\r |
abe0ea43 |
354 | \r |
355 | if (shared_ctl->writebuffsel == 1) {\r |
2433f409 |
356 | shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r |
4f265db7 |
357 | } else {\r |
2433f409 |
358 | shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r |
cb0316e4 |
359 | }\r |
abe0ea43 |
360 | writebuff_ptr = 0;\r |
361 | \r |
362 | /* predict sample counter for next frame */\r |
363 | if (PsndLen_exc_add) {\r |
364 | if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length = PsndLen + 1;\r |
365 | else length = PsndLen;\r |
366 | }\r |
367 | \r |
368 | /* give 940 ym job */\r |
369 | shared_ctl->writebuffsel ^= 1;\r |
370 | shared_ctl->length = length;\r |
371 | shared_ctl->stereo = stereo;\r |
372 | \r |
373 | add_job_940(JOB940_YM2612UPDATEONE);\r |
374 | \r |
85f8e929 |
375 | return ym_active_chs;\r |
cb0316e4 |
376 | }\r |
cb0316e4 |
377 | \r |
cb0316e4 |
378 | \r |
51a902ae |
379 | static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r |
abe0ea43 |
380 | static int mp3_play_bufsel = 0, mp3_job_started = 0;\r |
cb0316e4 |
381 | \r |
abe0ea43 |
382 | void mp3_update(int *buffer, int length, int stereo)\r |
cc68a136 |
383 | {\r |
abe0ea43 |
384 | int length_mp3;\r |
385 | int cdda_on;\r |
4f265db7 |
386 | \r |
da42200b |
387 | // playback was started, track not ended\r |
388 | cdda_on = loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r |
cc68a136 |
389 | \r |
abe0ea43 |
390 | if (!cdda_on) return;\r |
cc68a136 |
391 | \r |
abe0ea43 |
392 | if (!(PicoOpt&0x200)) {\r |
393 | mp3_update_local(buffer, length, stereo);\r |
394 | return;\r |
395 | }\r |
cc68a136 |
396 | \r |
abe0ea43 |
397 | length_mp3 = length;\r |
398 | if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r |
399 | else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r |
4f265db7 |
400 | \r |
abe0ea43 |
401 | /* do we have to wait? */\r |
402 | if (mp3_job_started && mp3_samples_ready < length_mp3) {\r |
403 | if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r |
404 | mp3_job_started = 0;\r |
405 | mp3_samples_ready += 1152;\r |
406 | }\r |
cb0316e4 |
407 | \r |
4f265db7 |
408 | /* mix mp3 data, only stereo */\r |
abe0ea43 |
409 | if (mp3_samples_ready >= length_mp3)\r |
cb0316e4 |
410 | {\r |
4f265db7 |
411 | int shr = 0;\r |
412 | void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r |
413 | if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r |
414 | else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r |
cb0316e4 |
415 | \r |
4f265db7 |
416 | if (1152 - mp3_buffer_offs >= length_mp3) {\r |
abe0ea43 |
417 | mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r |
4f265db7 |
418 | \r |
419 | mp3_buffer_offs += length_mp3;\r |
cb0316e4 |
420 | } else {\r |
abe0ea43 |
421 | // collect samples from both buffers..\r |
cb0316e4 |
422 | int left = 1152 - mp3_buffer_offs;\r |
4f265db7 |
423 | if (mp3_play_bufsel == 0)\r |
424 | {\r |
abe0ea43 |
425 | mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r |
4f265db7 |
426 | mp3_buffer_offs = length_mp3 - left;\r |
427 | mp3_play_bufsel = 1;\r |
428 | } else {\r |
429 | mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r |
430 | mp3_buffer_offs = length_mp3 - left;\r |
431 | mix_samples(buffer + ((left>>shr)<<1),\r |
432 | shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r |
433 | mp3_play_bufsel = 0;\r |
434 | }\r |
cc68a136 |
435 | }\r |
4f265db7 |
436 | mp3_samples_ready -= length_mp3;\r |
cc68a136 |
437 | }\r |
438 | \r |
abe0ea43 |
439 | // ask to decode more if we already can\r |
440 | if (!mp3_job_started)\r |
cb0316e4 |
441 | {\r |
abe0ea43 |
442 | mp3_job_started = 1;\r |
cb0316e4 |
443 | shared_ctl->mp3_buffsel ^= 1;\r |
abe0ea43 |
444 | add_job_940(JOB940_MP3DECODE);\r |
cb0316e4 |
445 | }\r |
cc68a136 |
446 | }\r |
cb0316e4 |
447 | \r |
448 | \r |
449 | /***********************************************************/\r |
450 | \r |
451 | void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r |
452 | {\r |
453 | int byte_offs = 0;\r |
454 | \r |
1cd356a3 |
455 | if (!(PicoOpt&0x800)) { // cdda disabled?\r |
cb0316e4 |
456 | return;\r |
457 | }\r |
458 | \r |
459 | if (loaded_mp3 != f)\r |
460 | {\r |
66fdc0f0 |
461 | if (PicoMessage != NULL)\r |
462 | {\r |
463 | fseek(f, 0, SEEK_END);\r |
464 | if (ftell(f) > 2*1024*1024)\r |
465 | PicoMessage("Loading MP3...");\r |
466 | }\r |
cb0316e4 |
467 | fseek(f, 0, SEEK_SET);\r |
468 | fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r |
e362c573 |
469 | if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r |
cb0316e4 |
470 | shared_ctl->mp3_len = ftell(f);\r |
471 | loaded_mp3 = f;\r |
abe0ea43 |
472 | \r |
473 | if (PicoOpt&0x200) {\r |
474 | // as we are going to change 940's cacheable area, we must invalidate it's cache..\r |
475 | if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r |
476 | add_job_940(JOB940_INVALIDATE_DCACHE);\r |
477 | }\r |
00bd648e |
478 | reset_timing = 1;\r |
cb0316e4 |
479 | }\r |
480 | \r |
481 | // seek..\r |
482 | if (pos) {\r |
483 | byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r |
484 | byte_offs *= pos;\r |
485 | byte_offs >>= 6;\r |
486 | }\r |
4f265db7 |
487 | // printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r |
cb0316e4 |
488 | \r |
489 | shared_ctl->mp3_offs = byte_offs;\r |
51a902ae |
490 | \r |
abe0ea43 |
491 | // reset buffer pointers and stuff..\r |
51a902ae |
492 | mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r |
abe0ea43 |
493 | mp3_job_started = 0;\r |
51a902ae |
494 | shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r |
abe0ea43 |
495 | \r |
496 | if (!(PicoOpt&0x200)) mp3_start_local();\r |
cb0316e4 |
497 | }\r |
498 | \r |
499 | \r |
75736070 |
500 | int mp3_get_offset(void)\r |
501 | {\r |
da42200b |
502 | unsigned int offs1024 = 0;\r |
75736070 |
503 | int cdda_on;\r |
504 | \r |
602133e1 |
505 | cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r |
abe0ea43 |
506 | (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r |
75736070 |
507 | \r |
508 | if (cdda_on) {\r |
509 | offs1024 = shared_ctl->mp3_offs << 7;\r |
da42200b |
510 | offs1024 /= shared_ctl->mp3_len >> 3;\r |
75736070 |
511 | }\r |
da42200b |
512 | printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r |
75736070 |
513 | \r |
514 | return offs1024;\r |
515 | }\r |
516 | \r |
517 | \r |