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 |
da42200b |
16 | #include "../common/mp3.h"\r |
e5f426aa |
17 | #include "../common/arm_utils.h"\r |
18 | #include "../common/menu.h"\r |
ea8c405f |
19 | #include "../common/emu.h"\r |
efcba75f |
20 | #include "../../pico/pico_int.h"\r |
21 | #include "../../pico/sound/ym2612.h"\r |
22 | #include "../../pico/sound/mix.h"\r |
4f265db7 |
23 | \r |
cc68a136 |
24 | /* we will need some gp2x internals here */\r |
25 | extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */\r |
26 | extern volatile unsigned long *gp2x_memregl;\r |
27 | \r |
00bd648e |
28 | extern int reset_timing;\r |
cc68a136 |
29 | static unsigned char *shared_mem = 0;\r |
30 | static _940_data_t *shared_data = 0;\r |
abe0ea43 |
31 | _940_ctl_t *shared_ctl = 0;\r |
32 | unsigned char *mp3_mem = 0;\r |
cb0316e4 |
33 | \r |
e362c573 |
34 | #define MP3_SIZE_MAX (0x400000 + 0x800000) // 12M\r |
e4fb433c |
35 | #define CODE940_FILE "pico940_v3.bin"\r |
cc68a136 |
36 | \r |
37 | int crashed_940 = 0;\r |
38 | \r |
51a902ae |
39 | static FILE *loaded_mp3 = 0;\r |
cc68a136 |
40 | \r |
41 | /***********************************************************/\r |
42 | \r |
43 | #define MAXOUT (+32767)\r |
44 | #define MINOUT (-32768)\r |
45 | \r |
46 | /* limitter */\r |
47 | #define Limit(val, max,min) { \\r |
48 | if ( val > max ) val = max; \\r |
49 | else if ( val < min ) val = min; \\r |
50 | }\r |
51 | \r |
52 | /* these will be managed locally on our side */\r |
cc68a136 |
53 | static UINT8 ST_address; /* address register */\r |
4b9c5888 |
54 | static INT32 addr_A1; /* address line A1 */\r |
cc68a136 |
55 | \r |
56 | static int writebuff_ptr = 0;\r |
57 | \r |
58 | \r |
cc68a136 |
59 | /* YM2612 write */\r |
60 | /* a = address */\r |
61 | /* v = value */\r |
62 | /* returns 1 if sample affecting state changed */\r |
4b9c5888 |
63 | int YM2612Write_940(unsigned int a, unsigned int v, int scanline)\r |
cc68a136 |
64 | {\r |
2433f409 |
65 | int upd = 1; /* the write affects sample generation */\r |
cc68a136 |
66 | \r |
cc68a136 |
67 | a &= 3;\r |
68 | \r |
2433f409 |
69 | //printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r |
70 | \r |
e4fb433c |
71 | switch (a)\r |
72 | {\r |
4b9c5888 |
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 2: /* address port 1 */\r |
85 | if (addr_A1 == 1 && ST_address == v)\r |
cc68a136 |
86 | return 0;\r |
4b9c5888 |
87 | ST_address = v;\r |
88 | addr_A1 = 1;\r |
89 | upd = 0;\r |
cc68a136 |
90 | break;\r |
cc68a136 |
91 | }\r |
92 | \r |
2433f409 |
93 | //printf("ym pass\n");\r |
94 | \r |
4b9c5888 |
95 | if (currentConfig.EmuOpt & 4)\r |
96 | {\r |
2433f409 |
97 | UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r |
98 | \r |
99 | /* detect rapid ym updates */\r |
4b9c5888 |
100 | if (upd && !(writebuff_ptr & 0x80000000) && scanline < 224)\r |
101 | {\r |
2433f409 |
102 | int mid = Pico.m.pal ? 68 : 93;\r |
4b9c5888 |
103 | if (scanline > mid) {\r |
104 | //printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, scanline);\r |
2433f409 |
105 | writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r |
106 | writebuff_ptr |= 0x80000000;\r |
4b9c5888 |
107 | //printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, scanline, addr, v, upd);\r |
cc68a136 |
108 | }\r |
2433f409 |
109 | }\r |
110 | \r |
111 | /* queue this write for 940 */\r |
112 | if ((writebuff_ptr&0xffff) < 2047) {\r |
113 | writebuff[writebuff_ptr++ & 0xffff] = (a<<8)|v;\r |
cc68a136 |
114 | } else {\r |
4ff2d527 |
115 | printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r |
cc68a136 |
116 | }\r |
117 | }\r |
118 | \r |
119 | return 0; // cause the engine to do updates once per frame only\r |
120 | }\r |
121 | \r |
cc68a136 |
122 | \r |
abe0ea43 |
123 | #define CHECK_BUSY(job) \\r |
124 | (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r |
125 | \r |
126 | static void wait_busy_940(int job)\r |
cc68a136 |
127 | {\r |
128 | int i;\r |
cc68a136 |
129 | \r |
abe0ea43 |
130 | job--;\r |
131 | for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r |
42c7b147 |
132 | spend_cycles(8*1024); // tested to be best for mp3 dec\r |
cc68a136 |
133 | if (i < 0x10000) return;\r |
134 | \r |
135 | /* 940 crashed */\r |
42c7b147 |
136 | printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r |
cc68a136 |
137 | for (i = 0; i < 8; i++)\r |
138 | printf("%i ", shared_ctl->vstarts[i]);\r |
139 | printf(")\n");\r |
abe0ea43 |
140 | printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r |
4f265db7 |
141 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
abe0ea43 |
142 | printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r |
4f265db7 |
143 | printf("trying to interrupt..\n");\r |
144 | gp2x_memregs[0x3B3E>>1] = 0xffff;\r |
abe0ea43 |
145 | for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r |
4f265db7 |
146 | spend_cycles(8*1024);\r |
147 | printf("i = 0x%x\n", i);\r |
abe0ea43 |
148 | printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r |
4f265db7 |
149 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
abe0ea43 |
150 | printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r |
4f265db7 |
151 | \r |
c6c6c9cd |
152 | me_update_msg("940 crashed, too much overclock?");\r |
cc68a136 |
153 | engineState = PGS_Menu;\r |
154 | crashed_940 = 1;\r |
cc68a136 |
155 | }\r |
156 | \r |
157 | \r |
abe0ea43 |
158 | static void add_job_940(int job)\r |
cc68a136 |
159 | {\r |
abe0ea43 |
160 | if (job <= 0 || job > 16) {\r |
161 | printf("add_job_940: bad job: %i\n", job);\r |
162 | return;\r |
4f265db7 |
163 | }\r |
abe0ea43 |
164 | \r |
165 | // generate interrupt for this job\r |
166 | job--;\r |
167 | gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r |
168 | \r |
169 | // printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r |
cc68a136 |
170 | }\r |
171 | \r |
172 | \r |
173 | void YM2612PicoStateLoad_940(void)\r |
174 | {\r |
4b9c5888 |
175 | UINT8 *REGS = YM2612GetRegs();\r |
176 | \r |
d5d11924 |
177 | /* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r |
178 | add_job_940(JOB940_PICOSTATELOAD);\r |
179 | if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r |
180 | \r |
181 | writebuff_ptr = 0;\r |
4b9c5888 |
182 | addr_A1 = *(INT32 *) (REGS + 0x200);\r |
cc68a136 |
183 | }\r |
184 | \r |
e4fb433c |
185 | void YM2612PicoStateSave2_940(int tat, int tbt)\r |
186 | {\r |
187 | UINT8 *ym_remote_regs, *ym_local_regs;\r |
188 | add_job_940(JOB940_PICOSTATESAVE2);\r |
189 | if (CHECK_BUSY(JOB940_PICOSTATESAVE2)) wait_busy_940(JOB940_PICOSTATESAVE2);\r |
190 | \r |
191 | ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r |
192 | ym_local_regs = YM2612GetRegs();\r |
193 | if (*(UINT32 *)(ym_remote_regs + 0x100) != 0x41534d59) {\r |
194 | printf("code940 didn't return valid save data\n");\r |
195 | return;\r |
196 | }\r |
197 | \r |
198 | /* copy addin data only */\r |
199 | memcpy(ym_local_regs, ym_remote_regs, 0x20);\r |
200 | memcpy(ym_local_regs + 0x100, ym_remote_regs + 0x100, 0x30);\r |
201 | memcpy(ym_local_regs + 0x0b8, ym_remote_regs + 0x0b8, 0x48);\r |
202 | memcpy(ym_local_regs + 0x1b8, ym_remote_regs + 0x1b8, 0x48);\r |
203 | *(INT32 *)(ym_local_regs + 0x108) = tat;\r |
204 | *(INT32 *)(ym_local_regs + 0x10c) = tbt;\r |
205 | }\r |
206 | \r |
207 | int YM2612PicoStateLoad2_940(int *tat, int *tbt)\r |
208 | {\r |
209 | UINT8 *ym_remote_regs, *ym_local_regs;\r |
210 | ym_local_regs = YM2612GetRegs();\r |
211 | ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r |
212 | \r |
213 | if (*(UINT32 *)(ym_local_regs + 0x100) != 0x41534d59)\r |
214 | return -1;\r |
215 | \r |
216 | *tat = *(INT32 *)(ym_local_regs + 0x108);\r |
217 | *tbt = *(INT32 *)(ym_local_regs + 0x10c);\r |
218 | \r |
219 | if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r |
220 | \r |
221 | /* flush writes */\r |
222 | if (shared_ctl->writebuffsel == 1) {\r |
223 | shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r |
224 | } else {\r |
225 | shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r |
226 | }\r |
227 | shared_ctl->writebuffsel ^= 1;\r |
228 | writebuff_ptr = 0;\r |
229 | add_job_940(JOB940_PICOSTATELOAD2_PREP);\r |
230 | if (CHECK_BUSY(JOB940_PICOSTATELOAD2_PREP)) wait_busy_940(JOB940_PICOSTATELOAD2_PREP);\r |
231 | \r |
232 | memcpy(ym_remote_regs, ym_local_regs, 0x200);\r |
233 | \r |
234 | add_job_940(JOB940_PICOSTATELOAD2);\r |
235 | if (CHECK_BUSY(JOB940_PICOSTATELOAD2)) wait_busy_940(JOB940_PICOSTATELOAD2);\r |
236 | \r |
237 | return 0;\r |
238 | }\r |
239 | \r |
cc68a136 |
240 | \r |
241 | static void internal_reset(void)\r |
242 | {\r |
243 | writebuff_ptr = 0;\r |
4b9c5888 |
244 | ST_address = addr_A1 = -1;\r |
cc68a136 |
245 | }\r |
246 | \r |
247 | \r |
f80d67e1 |
248 | /* this must be called after mmu hack, the allocated regions must not get cached */\r |
249 | void sharedmem_init(void)\r |
250 | {\r |
251 | if (shared_mem != NULL) return;\r |
252 | \r |
253 | shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r |
e4fb433c |
254 | if (shared_mem == MAP_FAILED)\r |
f80d67e1 |
255 | {\r |
256 | printf("mmap(shared_data) failed with %i\n", errno);\r |
257 | exit(1);\r |
258 | }\r |
259 | shared_data = (_940_data_t *) (shared_mem+0x100000);\r |
260 | /* this area must not get buffered on either side */\r |
261 | shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r |
e362c573 |
262 | mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r |
f80d67e1 |
263 | if (mp3_mem == MAP_FAILED)\r |
264 | {\r |
265 | printf("mmap(mp3_mem) failed with %i\n", errno);\r |
266 | exit(1);\r |
267 | }\r |
268 | crashed_940 = 1;\r |
269 | }\r |
270 | \r |
271 | \r |
85f8e929 |
272 | void sharedmem_deinit(void)\r |
273 | {\r |
274 | munmap(shared_mem, 0x210000);\r |
275 | munmap(mp3_mem, MP3_SIZE_MAX);\r |
276 | shared_mem = mp3_mem = NULL;\r |
277 | shared_data = NULL;\r |
278 | shared_ctl = NULL;\r |
279 | }\r |
280 | \r |
281 | \r |
cc68a136 |
282 | extern char **g_argv;\r |
283 | \r |
cc68a136 |
284 | void YM2612Init_940(int baseclock, int rate)\r |
285 | {\r |
286 | printf("YM2612Init_940()\n");\r |
b837b69b |
287 | printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r |
cc68a136 |
288 | \r |
b837b69b |
289 | Reset940(1, 2);\r |
cc68a136 |
290 | Pause940(1);\r |
291 | \r |
4f265db7 |
292 | gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r |
293 | gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r |
cc68a136 |
294 | \r |
abe0ea43 |
295 | gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r |
296 | gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r |
297 | \r |
298 | \r |
cc68a136 |
299 | if (crashed_940)\r |
300 | {\r |
301 | unsigned char ucData[1024];\r |
302 | int nRead, i, nLen = 0;\r |
303 | char binpath[1024];\r |
304 | FILE *fp;\r |
305 | \r |
306 | strncpy(binpath, g_argv[0], 1023);\r |
307 | binpath[1023] = 0;\r |
308 | for (i = strlen(binpath); i > 0; i--)\r |
309 | if (binpath[i] == '/') { binpath[i] = 0; break; }\r |
d524c827 |
310 | strcat(binpath, "/" CODE940_FILE);\r |
cc68a136 |
311 | \r |
312 | fp = fopen(binpath, "rb");\r |
313 | if(!fp)\r |
314 | {\r |
e2de9939 |
315 | memset(g_screen_ptr, 0, 320*240*2);\r |
a12e0116 |
316 | text_out16(10, 100, "failed to open required file:");\r |
317 | text_out16(10, 110, CODE940_FILE);\r |
318 | gp2x_video_flip2();\r |
cc68a136 |
319 | printf("failed to open %s\n", binpath);\r |
320 | exit(1);\r |
321 | }\r |
322 | \r |
323 | while(1)\r |
324 | {\r |
325 | nRead = fread(ucData, 1, 1024, fp);\r |
326 | if(nRead <= 0)\r |
327 | break;\r |
328 | memcpy(shared_mem + nLen, ucData, nRead);\r |
329 | nLen += nRead;\r |
330 | }\r |
331 | fclose(fp);\r |
332 | crashed_940 = 0;\r |
333 | }\r |
334 | \r |
335 | memset(shared_data, 0, sizeof(*shared_data));\r |
336 | memset(shared_ctl, 0, sizeof(*shared_ctl));\r |
337 | \r |
5f8c85be |
338 | /* cause local ym2612 to init REGS */\r |
339 | YM2612Init_(baseclock, rate);\r |
340 | \r |
cc68a136 |
341 | internal_reset();\r |
342 | \r |
51a902ae |
343 | loaded_mp3 = 0;\r |
344 | \r |
4f265db7 |
345 | gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r |
abe0ea43 |
346 | gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r |
347 | gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r |
cc68a136 |
348 | \r |
349 | /* start the 940 */\r |
b837b69b |
350 | Reset940(0, 2);\r |
cc68a136 |
351 | Pause940(0);\r |
352 | \r |
353 | // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r |
abe0ea43 |
354 | \r |
355 | /* now cause 940 to init it's ym2612 stuff */\r |
356 | shared_ctl->baseclock = baseclock;\r |
357 | shared_ctl->rate = rate;\r |
358 | add_job_940(JOB940_INITALL);\r |
cc68a136 |
359 | }\r |
360 | \r |
361 | \r |
362 | void YM2612ResetChip_940(void)\r |
363 | {\r |
daec7253 |
364 | //printf("YM2612ResetChip_940()\n");\r |
cc68a136 |
365 | if (shared_data == NULL) {\r |
366 | printf("YM2612ResetChip_940: reset before init?\n");\r |
367 | return;\r |
368 | }\r |
369 | \r |
4b9c5888 |
370 | YM2612ResetChip_();\r |
cc68a136 |
371 | internal_reset();\r |
372 | \r |
abe0ea43 |
373 | add_job_940(JOB940_YM2612RESETCHIP);\r |
cc68a136 |
374 | }\r |
375 | \r |
376 | \r |
abe0ea43 |
377 | int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r |
cb0316e4 |
378 | {\r |
abe0ea43 |
379 | int *ym_buf = shared_data->ym_buffer;\r |
85f8e929 |
380 | int ym_active_chs;\r |
4f265db7 |
381 | \r |
abe0ea43 |
382 | //printf("YM2612UpdateOne_940()\n");\r |
383 | \r |
384 | if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r |
385 | \r |
85f8e929 |
386 | ym_active_chs = shared_ctl->ym_active_chs;\r |
abe0ea43 |
387 | \r |
85f8e929 |
388 | // mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r |
389 | if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r |
390 | else memset32(buffer, 0, length<<stereo);\r |
abe0ea43 |
391 | \r |
392 | if (shared_ctl->writebuffsel == 1) {\r |
2433f409 |
393 | shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r |
4f265db7 |
394 | } else {\r |
2433f409 |
395 | shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r |
cb0316e4 |
396 | }\r |
abe0ea43 |
397 | writebuff_ptr = 0;\r |
398 | \r |
399 | /* predict sample counter for next frame */\r |
400 | if (PsndLen_exc_add) {\r |
52250671 |
401 | length = PsndLen;\r |
402 | if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length++;\r |
abe0ea43 |
403 | }\r |
404 | \r |
405 | /* give 940 ym job */\r |
406 | shared_ctl->writebuffsel ^= 1;\r |
407 | shared_ctl->length = length;\r |
408 | shared_ctl->stereo = stereo;\r |
409 | \r |
410 | add_job_940(JOB940_YM2612UPDATEONE);\r |
411 | \r |
85f8e929 |
412 | return ym_active_chs;\r |
cb0316e4 |
413 | }\r |
cb0316e4 |
414 | \r |
cb0316e4 |
415 | \r |
51a902ae |
416 | static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r |
abe0ea43 |
417 | static int mp3_play_bufsel = 0, mp3_job_started = 0;\r |
cb0316e4 |
418 | \r |
abe0ea43 |
419 | void mp3_update(int *buffer, int length, int stereo)\r |
cc68a136 |
420 | {\r |
abe0ea43 |
421 | int length_mp3;\r |
422 | int cdda_on;\r |
4f265db7 |
423 | \r |
da42200b |
424 | // playback was started, track not ended\r |
425 | cdda_on = loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r |
cc68a136 |
426 | \r |
abe0ea43 |
427 | if (!cdda_on) return;\r |
cc68a136 |
428 | \r |
abe0ea43 |
429 | if (!(PicoOpt&0x200)) {\r |
430 | mp3_update_local(buffer, length, stereo);\r |
431 | return;\r |
432 | }\r |
cc68a136 |
433 | \r |
abe0ea43 |
434 | length_mp3 = length;\r |
435 | if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r |
436 | else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r |
4f265db7 |
437 | \r |
abe0ea43 |
438 | /* do we have to wait? */\r |
439 | if (mp3_job_started && mp3_samples_ready < length_mp3) {\r |
440 | if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r |
441 | mp3_job_started = 0;\r |
442 | mp3_samples_ready += 1152;\r |
443 | }\r |
cb0316e4 |
444 | \r |
4f265db7 |
445 | /* mix mp3 data, only stereo */\r |
abe0ea43 |
446 | if (mp3_samples_ready >= length_mp3)\r |
cb0316e4 |
447 | {\r |
4f265db7 |
448 | int shr = 0;\r |
449 | void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r |
450 | if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r |
451 | else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r |
cb0316e4 |
452 | \r |
4f265db7 |
453 | if (1152 - mp3_buffer_offs >= length_mp3) {\r |
abe0ea43 |
454 | mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r |
4f265db7 |
455 | \r |
456 | mp3_buffer_offs += length_mp3;\r |
cb0316e4 |
457 | } else {\r |
abe0ea43 |
458 | // collect samples from both buffers..\r |
cb0316e4 |
459 | int left = 1152 - mp3_buffer_offs;\r |
4f265db7 |
460 | if (mp3_play_bufsel == 0)\r |
461 | {\r |
abe0ea43 |
462 | mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r |
4f265db7 |
463 | mp3_buffer_offs = length_mp3 - left;\r |
464 | mp3_play_bufsel = 1;\r |
465 | } else {\r |
466 | mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r |
467 | mp3_buffer_offs = length_mp3 - left;\r |
468 | mix_samples(buffer + ((left>>shr)<<1),\r |
469 | shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r |
470 | mp3_play_bufsel = 0;\r |
471 | }\r |
cc68a136 |
472 | }\r |
4f265db7 |
473 | mp3_samples_ready -= length_mp3;\r |
cc68a136 |
474 | }\r |
475 | \r |
abe0ea43 |
476 | // ask to decode more if we already can\r |
477 | if (!mp3_job_started)\r |
cb0316e4 |
478 | {\r |
abe0ea43 |
479 | mp3_job_started = 1;\r |
cb0316e4 |
480 | shared_ctl->mp3_buffsel ^= 1;\r |
abe0ea43 |
481 | add_job_940(JOB940_MP3DECODE);\r |
cb0316e4 |
482 | }\r |
cc68a136 |
483 | }\r |
cb0316e4 |
484 | \r |
485 | \r |
486 | /***********************************************************/\r |
487 | \r |
488 | void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r |
489 | {\r |
490 | int byte_offs = 0;\r |
491 | \r |
1cd356a3 |
492 | if (!(PicoOpt&0x800)) { // cdda disabled?\r |
cb0316e4 |
493 | return;\r |
494 | }\r |
495 | \r |
496 | if (loaded_mp3 != f)\r |
497 | {\r |
66fdc0f0 |
498 | if (PicoMessage != NULL)\r |
499 | {\r |
500 | fseek(f, 0, SEEK_END);\r |
501 | if (ftell(f) > 2*1024*1024)\r |
502 | PicoMessage("Loading MP3...");\r |
503 | }\r |
cb0316e4 |
504 | fseek(f, 0, SEEK_SET);\r |
505 | fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r |
e362c573 |
506 | if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r |
cb0316e4 |
507 | shared_ctl->mp3_len = ftell(f);\r |
508 | loaded_mp3 = f;\r |
abe0ea43 |
509 | \r |
091facb8 |
510 | if (PicoOpt & POPT_EXT_FM) {\r |
abe0ea43 |
511 | // as we are going to change 940's cacheable area, we must invalidate it's cache..\r |
512 | if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r |
513 | add_job_940(JOB940_INVALIDATE_DCACHE);\r |
514 | }\r |
00bd648e |
515 | reset_timing = 1;\r |
cb0316e4 |
516 | }\r |
517 | \r |
518 | // seek..\r |
519 | if (pos) {\r |
520 | byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r |
521 | byte_offs *= pos;\r |
522 | byte_offs >>= 6;\r |
523 | }\r |
091facb8 |
524 | printf(" mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r |
cb0316e4 |
525 | \r |
526 | shared_ctl->mp3_offs = byte_offs;\r |
51a902ae |
527 | \r |
abe0ea43 |
528 | // reset buffer pointers and stuff..\r |
51a902ae |
529 | mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r |
abe0ea43 |
530 | mp3_job_started = 0;\r |
51a902ae |
531 | shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r |
abe0ea43 |
532 | \r |
091facb8 |
533 | if (PicoOpt & POPT_EXT_FM)\r |
534 | {\r |
535 | add_job_940(JOB940_MP3RESET);\r |
536 | if (CHECK_BUSY(JOB940_MP3RESET)) wait_busy_940(JOB940_MP3RESET);\r |
537 | }\r |
538 | else\r |
539 | mp3_start_local();\r |
cb0316e4 |
540 | }\r |
541 | \r |
542 | \r |
75736070 |
543 | int mp3_get_offset(void)\r |
544 | {\r |
da42200b |
545 | unsigned int offs1024 = 0;\r |
75736070 |
546 | int cdda_on;\r |
547 | \r |
602133e1 |
548 | cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r |
abe0ea43 |
549 | (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r |
75736070 |
550 | \r |
551 | if (cdda_on) {\r |
552 | offs1024 = shared_ctl->mp3_offs << 7;\r |
da42200b |
553 | offs1024 /= shared_ctl->mp3_len >> 3;\r |
75736070 |
554 | }\r |
da42200b |
555 | printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r |
75736070 |
556 | \r |
557 | return offs1024;\r |
558 | }\r |
559 | \r |
560 | \r |