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 |
d572cbad |
14 | #include "soc_mmsp2.h"\r |
15 | #include "soc.h"\r |
720ee7f6 |
16 | #include "emu.h"\r |
11f4e722 |
17 | #include "../common/mp3.h"\r |
c7a4ff64 |
18 | #include "../common/arm_utils.h"\r |
19 | #include "../common/menu.h"\r |
f013066e |
20 | #include "../common/emu.h"\r |
f11bad75 |
21 | #include "../../pico/pico_int.h"\r |
22 | #include "../../pico/sound/ym2612.h"\r |
23 | #include "../../pico/sound/mix.h"\r |
49fe50f0 |
24 | \r |
8f1b51ef |
25 | extern int reset_timing;\r |
720ee7f6 |
26 | static unsigned char *shared_mem = 0;\r |
27 | static _940_data_t *shared_data = 0;\r |
edbb82f8 |
28 | _940_ctl_t *shared_ctl = 0;\r |
29 | unsigned char *mp3_mem = 0;\r |
598e7c06 |
30 | \r |
60b4b403 |
31 | #define MP3_SIZE_MAX (0x400000 + 0x800000) // 12M\r |
389aa76e |
32 | #define CODE940_FILE "pico940_v3.bin"\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 |
720ee7f6 |
50 | static UINT8 ST_address; /* address register */\r |
7481dd3a |
51 | static INT32 addr_A1; /* address line A1 */\r |
720ee7f6 |
52 | \r |
53 | static int writebuff_ptr = 0;\r |
54 | \r |
55 | \r |
720ee7f6 |
56 | /* YM2612 write */\r |
57 | /* a = address */\r |
58 | /* v = value */\r |
59 | /* returns 1 if sample affecting state changed */\r |
7481dd3a |
60 | int YM2612Write_940(unsigned int a, unsigned int v, int scanline)\r |
720ee7f6 |
61 | {\r |
79cad122 |
62 | int upd = 1; /* the write affects sample generation */\r |
720ee7f6 |
63 | \r |
720ee7f6 |
64 | a &= 3;\r |
65 | \r |
79cad122 |
66 | //printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r |
67 | \r |
389aa76e |
68 | switch (a)\r |
69 | {\r |
7481dd3a |
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 |
d032c15a |
77 | return 0;\r |
7481dd3a |
78 | upd = 0;\r |
79 | break;\r |
720ee7f6 |
80 | \r |
7481dd3a |
81 | case 2: /* address port 1 */\r |
82 | if (addr_A1 == 1 && ST_address == v)\r |
720ee7f6 |
83 | return 0;\r |
7481dd3a |
84 | ST_address = v;\r |
85 | addr_A1 = 1;\r |
86 | upd = 0;\r |
720ee7f6 |
87 | break;\r |
720ee7f6 |
88 | }\r |
89 | \r |
79cad122 |
90 | //printf("ym pass\n");\r |
91 | \r |
7481dd3a |
92 | if (currentConfig.EmuOpt & 4)\r |
93 | {\r |
79cad122 |
94 | UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r |
95 | \r |
96 | /* detect rapid ym updates */\r |
7481dd3a |
97 | if (upd && !(writebuff_ptr & 0x80000000) && scanline < 224)\r |
98 | {\r |
79cad122 |
99 | int mid = Pico.m.pal ? 68 : 93;\r |
7481dd3a |
100 | if (scanline > mid) {\r |
101 | //printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, scanline);\r |
79cad122 |
102 | writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r |
103 | writebuff_ptr |= 0x80000000;\r |
7481dd3a |
104 | //printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, scanline, addr, v, upd);\r |
720ee7f6 |
105 | }\r |
79cad122 |
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 |
720ee7f6 |
111 | } else {\r |
d032c15a |
112 | printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r |
720ee7f6 |
113 | }\r |
114 | }\r |
115 | \r |
116 | return 0; // cause the engine to do updates once per frame only\r |
117 | }\r |
118 | \r |
720ee7f6 |
119 | \r |
edbb82f8 |
120 | #define CHECK_BUSY(job) \\r |
121 | (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r |
122 | \r |
123 | static void wait_busy_940(int job)\r |
720ee7f6 |
124 | {\r |
125 | int i;\r |
720ee7f6 |
126 | \r |
edbb82f8 |
127 | job--;\r |
128 | for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r |
b30a8e67 |
129 | spend_cycles(8*1024); // tested to be best for mp3 dec\r |
720ee7f6 |
130 | if (i < 0x10000) return;\r |
131 | \r |
132 | /* 940 crashed */\r |
b30a8e67 |
133 | printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r |
720ee7f6 |
134 | for (i = 0; i < 8; i++)\r |
135 | printf("%i ", shared_ctl->vstarts[i]);\r |
136 | printf(")\n");\r |
edbb82f8 |
137 | printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r |
49fe50f0 |
138 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
edbb82f8 |
139 | printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r |
49fe50f0 |
140 | printf("trying to interrupt..\n");\r |
141 | gp2x_memregs[0x3B3E>>1] = 0xffff;\r |
edbb82f8 |
142 | for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r |
49fe50f0 |
143 | spend_cycles(8*1024);\r |
144 | printf("i = 0x%x\n", i);\r |
edbb82f8 |
145 | printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r |
49fe50f0 |
146 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
edbb82f8 |
147 | printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r |
49fe50f0 |
148 | \r |
3ffee69c |
149 | me_update_msg("940 crashed, too much overclock?");\r |
720ee7f6 |
150 | engineState = PGS_Menu;\r |
151 | crashed_940 = 1;\r |
720ee7f6 |
152 | }\r |
153 | \r |
154 | \r |
edbb82f8 |
155 | static void add_job_940(int job)\r |
720ee7f6 |
156 | {\r |
edbb82f8 |
157 | if (job <= 0 || job > 16) {\r |
158 | printf("add_job_940: bad job: %i\n", job);\r |
159 | return;\r |
49fe50f0 |
160 | }\r |
edbb82f8 |
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 |
720ee7f6 |
167 | }\r |
168 | \r |
169 | \r |
170 | void YM2612PicoStateLoad_940(void)\r |
171 | {\r |
7481dd3a |
172 | UINT8 *REGS = YM2612GetRegs();\r |
173 | \r |
fb88e614 |
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 |
7481dd3a |
179 | addr_A1 = *(INT32 *) (REGS + 0x200);\r |
720ee7f6 |
180 | }\r |
181 | \r |
389aa76e |
182 | void 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 |
204 | int 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 |
720ee7f6 |
237 | \r |
238 | static void internal_reset(void)\r |
239 | {\r |
240 | writebuff_ptr = 0;\r |
7481dd3a |
241 | ST_address = addr_A1 = -1;\r |
720ee7f6 |
242 | }\r |
243 | \r |
244 | \r |
52d3dd5f |
245 | /* this must be called after mmu hack, the allocated regions must not get cached */\r |
fa5e045b |
246 | void sharedmem940_init(void)\r |
52d3dd5f |
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 |
389aa76e |
251 | if (shared_mem == MAP_FAILED)\r |
52d3dd5f |
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 |
60b4b403 |
259 | mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r |
52d3dd5f |
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 |
fa5e045b |
269 | void sharedmem940_finish(void)\r |
4dfd9f42 |
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 |
720ee7f6 |
279 | extern char **g_argv;\r |
280 | \r |
720ee7f6 |
281 | void YM2612Init_940(int baseclock, int rate)\r |
282 | {\r |
283 | printf("YM2612Init_940()\n");\r |
8dfb9fd5 |
284 | printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r |
720ee7f6 |
285 | \r |
d572cbad |
286 | reset940(1, 2);\r |
287 | pause940(1);\r |
720ee7f6 |
288 | \r |
49fe50f0 |
289 | gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r |
290 | gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r |
720ee7f6 |
291 | \r |
edbb82f8 |
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 |
720ee7f6 |
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 |
95151aea |
307 | strcat(binpath, "/" CODE940_FILE);\r |
720ee7f6 |
308 | \r |
309 | fp = fopen(binpath, "rb");\r |
310 | if(!fp)\r |
311 | {\r |
e31266dd |
312 | memset(g_screen_ptr, 0, 320*240*2);\r |
13059a60 |
313 | text_out16(10, 100, "failed to open required file:");\r |
314 | text_out16(10, 110, CODE940_FILE);\r |
315 | gp2x_video_flip2();\r |
720ee7f6 |
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 |
31a77bde |
335 | /* cause local ym2612 to init REGS */\r |
336 | YM2612Init_(baseclock, rate);\r |
337 | \r |
720ee7f6 |
338 | internal_reset();\r |
339 | \r |
979ba09f |
340 | loaded_mp3 = 0;\r |
341 | \r |
49fe50f0 |
342 | gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r |
edbb82f8 |
343 | gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r |
344 | gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r |
720ee7f6 |
345 | \r |
346 | /* start the 940 */\r |
d572cbad |
347 | reset940(0, 2);\r |
348 | pause940(0);\r |
720ee7f6 |
349 | \r |
350 | // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r |
edbb82f8 |
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 |
720ee7f6 |
356 | }\r |
357 | \r |
358 | \r |
359 | void YM2612ResetChip_940(void)\r |
360 | {\r |
f76e88b5 |
361 | //printf("YM2612ResetChip_940()\n");\r |
720ee7f6 |
362 | if (shared_data == NULL) {\r |
363 | printf("YM2612ResetChip_940: reset before init?\n");\r |
364 | return;\r |
365 | }\r |
366 | \r |
7481dd3a |
367 | YM2612ResetChip_();\r |
720ee7f6 |
368 | internal_reset();\r |
369 | \r |
edbb82f8 |
370 | add_job_940(JOB940_YM2612RESETCHIP);\r |
720ee7f6 |
371 | }\r |
372 | \r |
373 | \r |
edbb82f8 |
374 | int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r |
598e7c06 |
375 | {\r |
edbb82f8 |
376 | int *ym_buf = shared_data->ym_buffer;\r |
4dfd9f42 |
377 | int ym_active_chs;\r |
49fe50f0 |
378 | \r |
edbb82f8 |
379 | //printf("YM2612UpdateOne_940()\n");\r |
380 | \r |
381 | if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r |
382 | \r |
4dfd9f42 |
383 | ym_active_chs = shared_ctl->ym_active_chs;\r |
edbb82f8 |
384 | \r |
4dfd9f42 |
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 |
edbb82f8 |
388 | \r |
389 | if (shared_ctl->writebuffsel == 1) {\r |
79cad122 |
390 | shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r |
49fe50f0 |
391 | } else {\r |
79cad122 |
392 | shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r |
598e7c06 |
393 | }\r |
edbb82f8 |
394 | writebuff_ptr = 0;\r |
395 | \r |
396 | /* predict sample counter for next frame */\r |
397 | if (PsndLen_exc_add) {\r |
2dce60fd |
398 | length = PsndLen;\r |
399 | if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length++;\r |
edbb82f8 |
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 |
4dfd9f42 |
409 | return ym_active_chs;\r |
598e7c06 |
410 | }\r |
598e7c06 |
411 | \r |
598e7c06 |
412 | \r |
979ba09f |
413 | static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r |
edbb82f8 |
414 | static int mp3_play_bufsel = 0, mp3_job_started = 0;\r |
598e7c06 |
415 | \r |
edbb82f8 |
416 | void mp3_update(int *buffer, int length, int stereo)\r |
720ee7f6 |
417 | {\r |
edbb82f8 |
418 | int length_mp3;\r |
419 | int cdda_on;\r |
49fe50f0 |
420 | \r |
11f4e722 |
421 | // playback was started, track not ended\r |
422 | cdda_on = loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r |
720ee7f6 |
423 | \r |
edbb82f8 |
424 | if (!cdda_on) return;\r |
720ee7f6 |
425 | \r |
edbb82f8 |
426 | if (!(PicoOpt&0x200)) {\r |
427 | mp3_update_local(buffer, length, stereo);\r |
428 | return;\r |
429 | }\r |
720ee7f6 |
430 | \r |
edbb82f8 |
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 |
49fe50f0 |
434 | \r |
edbb82f8 |
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 |
598e7c06 |
441 | \r |
49fe50f0 |
442 | /* mix mp3 data, only stereo */\r |
edbb82f8 |
443 | if (mp3_samples_ready >= length_mp3)\r |
598e7c06 |
444 | {\r |
49fe50f0 |
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 |
598e7c06 |
449 | \r |
49fe50f0 |
450 | if (1152 - mp3_buffer_offs >= length_mp3) {\r |
edbb82f8 |
451 | mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r |
49fe50f0 |
452 | \r |
453 | mp3_buffer_offs += length_mp3;\r |
598e7c06 |
454 | } else {\r |
edbb82f8 |
455 | // collect samples from both buffers..\r |
598e7c06 |
456 | int left = 1152 - mp3_buffer_offs;\r |
49fe50f0 |
457 | if (mp3_play_bufsel == 0)\r |
458 | {\r |
edbb82f8 |
459 | mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r |
49fe50f0 |
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 |
720ee7f6 |
469 | }\r |
49fe50f0 |
470 | mp3_samples_ready -= length_mp3;\r |
720ee7f6 |
471 | }\r |
472 | \r |
edbb82f8 |
473 | // ask to decode more if we already can\r |
474 | if (!mp3_job_started)\r |
598e7c06 |
475 | {\r |
edbb82f8 |
476 | mp3_job_started = 1;\r |
598e7c06 |
477 | shared_ctl->mp3_buffsel ^= 1;\r |
edbb82f8 |
478 | add_job_940(JOB940_MP3DECODE);\r |
598e7c06 |
479 | }\r |
720ee7f6 |
480 | }\r |
598e7c06 |
481 | \r |
482 | \r |
483 | /***********************************************************/\r |
484 | \r |
485 | void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r |
486 | {\r |
487 | int byte_offs = 0;\r |
488 | \r |
7bc9cd7f |
489 | if (!(PicoOpt&0x800)) { // cdda disabled?\r |
598e7c06 |
490 | return;\r |
491 | }\r |
492 | \r |
493 | if (loaded_mp3 != f)\r |
494 | {\r |
dfa4c846 |
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 |
598e7c06 |
501 | fseek(f, 0, SEEK_SET);\r |
502 | fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r |
60b4b403 |
503 | if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r |
598e7c06 |
504 | shared_ctl->mp3_len = ftell(f);\r |
505 | loaded_mp3 = f;\r |
edbb82f8 |
506 | \r |
6e507f76 |
507 | if (PicoOpt & POPT_EXT_FM) {\r |
edbb82f8 |
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 |
8f1b51ef |
512 | reset_timing = 1;\r |
598e7c06 |
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 |
6e507f76 |
521 | printf(" mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r |
598e7c06 |
522 | \r |
523 | shared_ctl->mp3_offs = byte_offs;\r |
979ba09f |
524 | \r |
edbb82f8 |
525 | // reset buffer pointers and stuff..\r |
979ba09f |
526 | mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r |
edbb82f8 |
527 | mp3_job_started = 0;\r |
979ba09f |
528 | shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r |
edbb82f8 |
529 | \r |
6e507f76 |
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 |
598e7c06 |
537 | }\r |
538 | \r |
539 | \r |
98c9d8d9 |
540 | int mp3_get_offset(void)\r |
541 | {\r |
11f4e722 |
542 | unsigned int offs1024 = 0;\r |
98c9d8d9 |
543 | int cdda_on;\r |
544 | \r |
dd5fd477 |
545 | cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r |
edbb82f8 |
546 | (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r |
98c9d8d9 |
547 | \r |
548 | if (cdda_on) {\r |
549 | offs1024 = shared_ctl->mp3_offs << 7;\r |
11f4e722 |
550 | offs1024 /= shared_ctl->mp3_len >> 3;\r |
98c9d8d9 |
551 | }\r |
11f4e722 |
552 | printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r |
98c9d8d9 |
553 | \r |
554 | return offs1024;\r |
555 | }\r |
556 | \r |
557 | \r |