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 *REGS = 0; /* we will also keep local copy of regs for savestates and such */\r |
5f8c85be |
55 | static INT32 *addr_A1; /* address line A1 */\r |
56 | \r |
57 | static int dacen;\r |
cc68a136 |
58 | static INT32 dacout;\r |
59 | static UINT8 ST_address; /* address register */\r |
cc68a136 |
60 | \r |
61 | static int writebuff_ptr = 0;\r |
62 | \r |
63 | \r |
64 | /* OPN Mode Register Write */\r |
2433f409 |
65 | static int set_timers( int v )\r |
cc68a136 |
66 | {\r |
2433f409 |
67 | int change;\r |
68 | \r |
cc68a136 |
69 | /* b7 = CSM MODE */\r |
70 | /* b6 = 3 slot mode */\r |
71 | /* b5 = reset b */\r |
72 | /* b4 = reset a */\r |
73 | /* b3 = timer enable b */\r |
74 | /* b2 = timer enable a */\r |
75 | /* b1 = load b */\r |
76 | /* b0 = load a */\r |
b542be46 |
77 | change = (ym2612_st->mode ^ v) & 0xc0;\r |
78 | ym2612_st->mode = v;\r |
cc68a136 |
79 | \r |
80 | /* reset Timer b flag */\r |
81 | if( v & 0x20 )\r |
b542be46 |
82 | ym2612_st->status &= ~2;\r |
cc68a136 |
83 | \r |
84 | /* reset Timer a flag */\r |
85 | if( v & 0x10 )\r |
b542be46 |
86 | ym2612_st->status &= ~1;\r |
2433f409 |
87 | \r |
88 | return change;\r |
cc68a136 |
89 | }\r |
90 | \r |
91 | /* YM2612 write */\r |
92 | /* a = address */\r |
93 | /* v = value */\r |
94 | /* returns 1 if sample affecting state changed */\r |
95 | int YM2612Write_940(unsigned int a, unsigned int v)\r |
96 | {\r |
2433f409 |
97 | int addr;\r |
98 | int upd = 1; /* the write affects sample generation */\r |
cc68a136 |
99 | \r |
100 | v &= 0xff; /* adjust to 8 bit bus */\r |
101 | a &= 3;\r |
102 | \r |
2433f409 |
103 | //printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r |
104 | \r |
cc68a136 |
105 | switch( a ) {\r |
106 | case 0: /* address port 0 */\r |
5f8c85be |
107 | if (!*addr_A1 && ST_address == v)\r |
4ff2d527 |
108 | return 0; /* address already selected, don't send this command to 940 */\r |
cc68a136 |
109 | ST_address = v;\r |
4ff2d527 |
110 | /* don't send DAC or timer related address changes to 940 */\r |
5f8c85be |
111 | if (!*addr_A1 && (v & 0xf0) == 0x20 &&\r |
4ff2d527 |
112 | (v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a))\r |
113 | return 0;\r |
5f8c85be |
114 | *addr_A1 = 0;\r |
2433f409 |
115 | upd = 0;\r |
cc68a136 |
116 | break;\r |
117 | \r |
118 | case 1: /* data port 0 */\r |
5f8c85be |
119 | if (*addr_A1 != 0) {\r |
cc68a136 |
120 | return 0; /* verified on real YM2608 */\r |
121 | }\r |
122 | \r |
123 | addr = ST_address;\r |
124 | REGS[addr] = v;\r |
125 | \r |
126 | switch( addr & 0xf0 )\r |
127 | {\r |
128 | case 0x20: /* 0x20-0x2f Mode */\r |
129 | switch( addr )\r |
130 | {\r |
131 | case 0x24: { // timer A High 8\r |
b542be46 |
132 | int TAnew = (ym2612_st->TA & 0x03)|(((int)v)<<2);\r |
133 | if (ym2612_st->TA != TAnew) {\r |
cc68a136 |
134 | // we should reset ticker only if new value is written. Outrun requires this.\r |
b542be46 |
135 | ym2612_st->TA = TAnew;\r |
136 | ym2612_st->TAC = (1024-TAnew)*18;\r |
137 | ym2612_st->TAT = 0;\r |
cc68a136 |
138 | }\r |
139 | return 0;\r |
140 | }\r |
141 | case 0x25: { // timer A Low 2\r |
b542be46 |
142 | int TAnew = (ym2612_st->TA & 0x3fc)|(v&3);\r |
143 | if (ym2612_st->TA != TAnew) {\r |
144 | ym2612_st->TA = TAnew;\r |
145 | ym2612_st->TAC = (1024-TAnew)*18;\r |
146 | ym2612_st->TAT = 0;\r |
cc68a136 |
147 | }\r |
148 | return 0;\r |
149 | }\r |
150 | case 0x26: // timer B\r |
b542be46 |
151 | if (ym2612_st->TB != v) {\r |
152 | ym2612_st->TB = v;\r |
153 | ym2612_st->TBC = (256-v)<<4;\r |
154 | ym2612_st->TBC *= 18;\r |
155 | ym2612_st->TBT = 0;\r |
cc68a136 |
156 | }\r |
157 | return 0;\r |
158 | case 0x27: /* mode, timer control */\r |
2433f409 |
159 | if (set_timers( v ))\r |
160 | break; // other side needs ST.mode for 3slot mode\r |
161 | return 0;\r |
cc68a136 |
162 | case 0x2a: /* DAC data (YM2612) */\r |
163 | dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */\r |
164 | return 0;\r |
165 | case 0x2b: /* DAC Sel (YM2612) */\r |
166 | /* b7 = dac enable */\r |
167 | dacen = v & 0x80;\r |
2433f409 |
168 | upd = 0;\r |
cc68a136 |
169 | break; // other side has to know this\r |
170 | default:\r |
171 | break;\r |
172 | }\r |
173 | break;\r |
174 | }\r |
175 | break;\r |
176 | \r |
177 | case 2: /* address port 1 */\r |
5f8c85be |
178 | if (*addr_A1 && ST_address == v)\r |
4ff2d527 |
179 | return 0;\r |
cc68a136 |
180 | ST_address = v;\r |
5f8c85be |
181 | *addr_A1 = 1;\r |
2433f409 |
182 | upd = 0;\r |
cc68a136 |
183 | break;\r |
184 | \r |
185 | case 3: /* data port 1 */\r |
5f8c85be |
186 | if (*addr_A1 != 1) {\r |
cc68a136 |
187 | return 0; /* verified on real YM2608 */\r |
188 | }\r |
189 | \r |
190 | addr = ST_address | 0x100;\r |
191 | REGS[addr] = v;\r |
192 | break;\r |
193 | }\r |
194 | \r |
2433f409 |
195 | //printf("ym pass\n");\r |
196 | \r |
cc68a136 |
197 | if(currentConfig.EmuOpt & 4) {\r |
2433f409 |
198 | UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r |
199 | \r |
200 | /* detect rapid ym updates */\r |
201 | if (upd && !(writebuff_ptr & 0x80000000) && Pico.m.scanline < 224) {\r |
202 | int mid = Pico.m.pal ? 68 : 93;\r |
203 | if (Pico.m.scanline > mid) {\r |
204 | //printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, Pico.m.scanline);\r |
205 | writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r |
206 | writebuff_ptr |= 0x80000000;\r |
207 | //printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, Pico.m.scanline, addr, v, upd);\r |
cc68a136 |
208 | }\r |
2433f409 |
209 | }\r |
210 | \r |
211 | /* queue this write for 940 */\r |
212 | if ((writebuff_ptr&0xffff) < 2047) {\r |
213 | writebuff[writebuff_ptr++ & 0xffff] = (a<<8)|v;\r |
cc68a136 |
214 | } else {\r |
4ff2d527 |
215 | printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r |
cc68a136 |
216 | }\r |
217 | }\r |
218 | \r |
219 | return 0; // cause the engine to do updates once per frame only\r |
220 | }\r |
221 | \r |
cc68a136 |
222 | \r |
abe0ea43 |
223 | #define CHECK_BUSY(job) \\r |
224 | (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r |
225 | \r |
226 | static void wait_busy_940(int job)\r |
cc68a136 |
227 | {\r |
228 | int i;\r |
cc68a136 |
229 | \r |
abe0ea43 |
230 | job--;\r |
231 | for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r |
42c7b147 |
232 | spend_cycles(8*1024); // tested to be best for mp3 dec\r |
cc68a136 |
233 | if (i < 0x10000) return;\r |
234 | \r |
235 | /* 940 crashed */\r |
42c7b147 |
236 | printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r |
cc68a136 |
237 | for (i = 0; i < 8; i++)\r |
238 | printf("%i ", shared_ctl->vstarts[i]);\r |
239 | printf(")\n");\r |
abe0ea43 |
240 | printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r |
4f265db7 |
241 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
abe0ea43 |
242 | printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r |
4f265db7 |
243 | printf("trying to interrupt..\n");\r |
244 | gp2x_memregs[0x3B3E>>1] = 0xffff;\r |
abe0ea43 |
245 | for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r |
4f265db7 |
246 | spend_cycles(8*1024);\r |
247 | printf("i = 0x%x\n", i);\r |
abe0ea43 |
248 | printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r |
4f265db7 |
249 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
abe0ea43 |
250 | printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r |
4f265db7 |
251 | \r |
6cadc2da |
252 | strcpy(menuErrorMsg, "940 crashed, too much overclock?");\r |
cc68a136 |
253 | engineState = PGS_Menu;\r |
254 | crashed_940 = 1;\r |
cc68a136 |
255 | }\r |
256 | \r |
257 | \r |
abe0ea43 |
258 | static void add_job_940(int job)\r |
cc68a136 |
259 | {\r |
abe0ea43 |
260 | if (job <= 0 || job > 16) {\r |
261 | printf("add_job_940: bad job: %i\n", job);\r |
262 | return;\r |
4f265db7 |
263 | }\r |
abe0ea43 |
264 | \r |
265 | // generate interrupt for this job\r |
266 | job--;\r |
267 | gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r |
268 | \r |
269 | // printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r |
cc68a136 |
270 | }\r |
271 | \r |
272 | \r |
273 | void YM2612PicoStateLoad_940(void)\r |
274 | {\r |
5f8c85be |
275 | int i, old_A1 = *addr_A1;\r |
cc68a136 |
276 | \r |
d5d11924 |
277 | /* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r |
278 | add_job_940(JOB940_PICOSTATELOAD);\r |
279 | if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r |
280 | \r |
281 | writebuff_ptr = 0;\r |
282 | \r |
cc68a136 |
283 | // feed all the registers and update internal state\r |
284 | for(i = 0; i < 0x100; i++) {\r |
285 | YM2612Write_940(0, i);\r |
286 | YM2612Write_940(1, REGS[i]);\r |
287 | }\r |
288 | for(i = 0; i < 0x100; i++) {\r |
289 | YM2612Write_940(2, i);\r |
290 | YM2612Write_940(3, REGS[i|0x100]);\r |
291 | }\r |
292 | \r |
5f8c85be |
293 | *addr_A1 = old_A1;\r |
cc68a136 |
294 | }\r |
295 | \r |
296 | \r |
297 | static void internal_reset(void)\r |
298 | {\r |
299 | writebuff_ptr = 0;\r |
b542be46 |
300 | ym2612_st->mode = 0;\r |
301 | ym2612_st->status = 0; /* normal mode */\r |
302 | ym2612_st->TA = 0;\r |
303 | ym2612_st->TAC = 0;\r |
304 | ym2612_st->TAT = 0;\r |
305 | ym2612_st->TB = 0;\r |
306 | ym2612_st->TBC = 0;\r |
307 | ym2612_st->TBT = 0;\r |
5f8c85be |
308 | dacen = 0;\r |
309 | dacout = 0;\r |
310 | ST_address= 0;\r |
cc68a136 |
311 | }\r |
312 | \r |
313 | \r |
f80d67e1 |
314 | /* this must be called after mmu hack, the allocated regions must not get cached */\r |
315 | void sharedmem_init(void)\r |
316 | {\r |
317 | if (shared_mem != NULL) return;\r |
318 | \r |
319 | shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r |
320 | if(shared_mem == MAP_FAILED)\r |
321 | {\r |
322 | printf("mmap(shared_data) failed with %i\n", errno);\r |
323 | exit(1);\r |
324 | }\r |
325 | shared_data = (_940_data_t *) (shared_mem+0x100000);\r |
326 | /* this area must not get buffered on either side */\r |
327 | shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r |
e362c573 |
328 | mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r |
f80d67e1 |
329 | if (mp3_mem == MAP_FAILED)\r |
330 | {\r |
331 | printf("mmap(mp3_mem) failed with %i\n", errno);\r |
332 | exit(1);\r |
333 | }\r |
334 | crashed_940 = 1;\r |
335 | }\r |
336 | \r |
337 | \r |
85f8e929 |
338 | void sharedmem_deinit(void)\r |
339 | {\r |
340 | munmap(shared_mem, 0x210000);\r |
341 | munmap(mp3_mem, MP3_SIZE_MAX);\r |
342 | shared_mem = mp3_mem = NULL;\r |
343 | shared_data = NULL;\r |
344 | shared_ctl = NULL;\r |
345 | }\r |
346 | \r |
347 | \r |
cc68a136 |
348 | extern char **g_argv;\r |
349 | \r |
350 | /* none of the functions in this file should be called before this one */\r |
351 | void YM2612Init_940(int baseclock, int rate)\r |
352 | {\r |
353 | printf("YM2612Init_940()\n");\r |
b837b69b |
354 | printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r |
cc68a136 |
355 | \r |
b837b69b |
356 | Reset940(1, 2);\r |
cc68a136 |
357 | Pause940(1);\r |
358 | \r |
4f265db7 |
359 | gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r |
360 | gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r |
cc68a136 |
361 | \r |
abe0ea43 |
362 | gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r |
363 | gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r |
364 | \r |
365 | \r |
cc68a136 |
366 | if (crashed_940)\r |
367 | {\r |
368 | unsigned char ucData[1024];\r |
369 | int nRead, i, nLen = 0;\r |
370 | char binpath[1024];\r |
371 | FILE *fp;\r |
372 | \r |
373 | strncpy(binpath, g_argv[0], 1023);\r |
374 | binpath[1023] = 0;\r |
375 | for (i = strlen(binpath); i > 0; i--)\r |
376 | if (binpath[i] == '/') { binpath[i] = 0; break; }\r |
d524c827 |
377 | strcat(binpath, "/" CODE940_FILE);\r |
cc68a136 |
378 | \r |
379 | fp = fopen(binpath, "rb");\r |
380 | if(!fp)\r |
381 | {\r |
a12e0116 |
382 | memset(gp2x_screen, 0, 320*240*2);\r |
383 | text_out16(10, 100, "failed to open required file:");\r |
384 | text_out16(10, 110, CODE940_FILE);\r |
385 | gp2x_video_flip2();\r |
cc68a136 |
386 | printf("failed to open %s\n", binpath);\r |
387 | exit(1);\r |
388 | }\r |
389 | \r |
390 | while(1)\r |
391 | {\r |
392 | nRead = fread(ucData, 1, 1024, fp);\r |
393 | if(nRead <= 0)\r |
394 | break;\r |
395 | memcpy(shared_mem + nLen, ucData, nRead);\r |
396 | nLen += nRead;\r |
397 | }\r |
398 | fclose(fp);\r |
399 | crashed_940 = 0;\r |
400 | }\r |
401 | \r |
402 | memset(shared_data, 0, sizeof(*shared_data));\r |
403 | memset(shared_ctl, 0, sizeof(*shared_ctl));\r |
404 | \r |
5f8c85be |
405 | /* cause local ym2612 to init REGS */\r |
406 | YM2612Init_(baseclock, rate);\r |
407 | \r |
cc68a136 |
408 | REGS = YM2612GetRegs();\r |
5f8c85be |
409 | addr_A1 = (INT32 *) (REGS + 0x200);\r |
cc68a136 |
410 | \r |
411 | ym2612_dacen = &dacen;\r |
412 | ym2612_dacout = &dacout;\r |
413 | \r |
414 | internal_reset();\r |
415 | \r |
51a902ae |
416 | loaded_mp3 = 0;\r |
417 | \r |
4f265db7 |
418 | gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r |
abe0ea43 |
419 | gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r |
420 | gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r |
cc68a136 |
421 | \r |
422 | /* start the 940 */\r |
b837b69b |
423 | Reset940(0, 2);\r |
cc68a136 |
424 | Pause940(0);\r |
425 | \r |
426 | // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r |
abe0ea43 |
427 | \r |
428 | /* now cause 940 to init it's ym2612 stuff */\r |
429 | shared_ctl->baseclock = baseclock;\r |
430 | shared_ctl->rate = rate;\r |
431 | add_job_940(JOB940_INITALL);\r |
cc68a136 |
432 | }\r |
433 | \r |
434 | \r |
435 | void YM2612ResetChip_940(void)\r |
436 | {\r |
437 | printf("YM2612ResetChip_940()\n");\r |
438 | if (shared_data == NULL) {\r |
439 | printf("YM2612ResetChip_940: reset before init?\n");\r |
440 | return;\r |
441 | }\r |
442 | \r |
cc68a136 |
443 | internal_reset();\r |
444 | \r |
abe0ea43 |
445 | add_job_940(JOB940_YM2612RESETCHIP);\r |
cc68a136 |
446 | }\r |
447 | \r |
448 | \r |
abe0ea43 |
449 | int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r |
cb0316e4 |
450 | {\r |
abe0ea43 |
451 | int *ym_buf = shared_data->ym_buffer;\r |
85f8e929 |
452 | int ym_active_chs;\r |
4f265db7 |
453 | \r |
abe0ea43 |
454 | //printf("YM2612UpdateOne_940()\n");\r |
455 | \r |
456 | if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r |
457 | \r |
85f8e929 |
458 | ym_active_chs = shared_ctl->ym_active_chs;\r |
abe0ea43 |
459 | \r |
85f8e929 |
460 | // mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r |
461 | if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r |
462 | else memset32(buffer, 0, length<<stereo);\r |
abe0ea43 |
463 | \r |
464 | if (shared_ctl->writebuffsel == 1) {\r |
2433f409 |
465 | shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r |
4f265db7 |
466 | } else {\r |
2433f409 |
467 | shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r |
cb0316e4 |
468 | }\r |
abe0ea43 |
469 | writebuff_ptr = 0;\r |
470 | \r |
471 | /* predict sample counter for next frame */\r |
472 | if (PsndLen_exc_add) {\r |
473 | if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length = PsndLen + 1;\r |
474 | else length = PsndLen;\r |
475 | }\r |
476 | \r |
477 | /* give 940 ym job */\r |
478 | shared_ctl->writebuffsel ^= 1;\r |
479 | shared_ctl->length = length;\r |
480 | shared_ctl->stereo = stereo;\r |
481 | \r |
482 | add_job_940(JOB940_YM2612UPDATEONE);\r |
483 | \r |
85f8e929 |
484 | return ym_active_chs;\r |
cb0316e4 |
485 | }\r |
cb0316e4 |
486 | \r |
cb0316e4 |
487 | \r |
51a902ae |
488 | static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r |
abe0ea43 |
489 | static int mp3_play_bufsel = 0, mp3_job_started = 0;\r |
cb0316e4 |
490 | \r |
abe0ea43 |
491 | void mp3_update(int *buffer, int length, int stereo)\r |
cc68a136 |
492 | {\r |
abe0ea43 |
493 | int length_mp3;\r |
494 | int cdda_on;\r |
4f265db7 |
495 | \r |
da42200b |
496 | // playback was started, track not ended\r |
497 | cdda_on = loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r |
cc68a136 |
498 | \r |
abe0ea43 |
499 | if (!cdda_on) return;\r |
cc68a136 |
500 | \r |
abe0ea43 |
501 | if (!(PicoOpt&0x200)) {\r |
502 | mp3_update_local(buffer, length, stereo);\r |
503 | return;\r |
504 | }\r |
cc68a136 |
505 | \r |
abe0ea43 |
506 | length_mp3 = length;\r |
507 | if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r |
508 | else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r |
4f265db7 |
509 | \r |
abe0ea43 |
510 | /* do we have to wait? */\r |
511 | if (mp3_job_started && mp3_samples_ready < length_mp3) {\r |
512 | if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r |
513 | mp3_job_started = 0;\r |
514 | mp3_samples_ready += 1152;\r |
515 | }\r |
cb0316e4 |
516 | \r |
4f265db7 |
517 | /* mix mp3 data, only stereo */\r |
abe0ea43 |
518 | if (mp3_samples_ready >= length_mp3)\r |
cb0316e4 |
519 | {\r |
4f265db7 |
520 | int shr = 0;\r |
521 | void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r |
522 | if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r |
523 | else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r |
cb0316e4 |
524 | \r |
4f265db7 |
525 | if (1152 - mp3_buffer_offs >= length_mp3) {\r |
abe0ea43 |
526 | mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r |
4f265db7 |
527 | \r |
528 | mp3_buffer_offs += length_mp3;\r |
cb0316e4 |
529 | } else {\r |
abe0ea43 |
530 | // collect samples from both buffers..\r |
cb0316e4 |
531 | int left = 1152 - mp3_buffer_offs;\r |
4f265db7 |
532 | if (mp3_play_bufsel == 0)\r |
533 | {\r |
abe0ea43 |
534 | mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r |
4f265db7 |
535 | mp3_buffer_offs = length_mp3 - left;\r |
536 | mp3_play_bufsel = 1;\r |
537 | } else {\r |
538 | mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r |
539 | mp3_buffer_offs = length_mp3 - left;\r |
540 | mix_samples(buffer + ((left>>shr)<<1),\r |
541 | shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r |
542 | mp3_play_bufsel = 0;\r |
543 | }\r |
cc68a136 |
544 | }\r |
4f265db7 |
545 | mp3_samples_ready -= length_mp3;\r |
cc68a136 |
546 | }\r |
547 | \r |
abe0ea43 |
548 | // ask to decode more if we already can\r |
549 | if (!mp3_job_started)\r |
cb0316e4 |
550 | {\r |
abe0ea43 |
551 | mp3_job_started = 1;\r |
cb0316e4 |
552 | shared_ctl->mp3_buffsel ^= 1;\r |
abe0ea43 |
553 | add_job_940(JOB940_MP3DECODE);\r |
cb0316e4 |
554 | }\r |
cc68a136 |
555 | }\r |
cb0316e4 |
556 | \r |
557 | \r |
558 | /***********************************************************/\r |
559 | \r |
560 | void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r |
561 | {\r |
562 | int byte_offs = 0;\r |
563 | \r |
1cd356a3 |
564 | if (!(PicoOpt&0x800)) { // cdda disabled?\r |
cb0316e4 |
565 | return;\r |
566 | }\r |
567 | \r |
568 | if (loaded_mp3 != f)\r |
569 | {\r |
66fdc0f0 |
570 | if (PicoMessage != NULL)\r |
571 | {\r |
572 | fseek(f, 0, SEEK_END);\r |
573 | if (ftell(f) > 2*1024*1024)\r |
574 | PicoMessage("Loading MP3...");\r |
575 | }\r |
cb0316e4 |
576 | fseek(f, 0, SEEK_SET);\r |
577 | fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r |
e362c573 |
578 | if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r |
cb0316e4 |
579 | shared_ctl->mp3_len = ftell(f);\r |
580 | loaded_mp3 = f;\r |
abe0ea43 |
581 | \r |
582 | if (PicoOpt&0x200) {\r |
583 | // as we are going to change 940's cacheable area, we must invalidate it's cache..\r |
584 | if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r |
585 | add_job_940(JOB940_INVALIDATE_DCACHE);\r |
586 | }\r |
00bd648e |
587 | reset_timing = 1;\r |
cb0316e4 |
588 | }\r |
589 | \r |
590 | // seek..\r |
591 | if (pos) {\r |
592 | byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r |
593 | byte_offs *= pos;\r |
594 | byte_offs >>= 6;\r |
595 | }\r |
4f265db7 |
596 | // printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r |
cb0316e4 |
597 | \r |
598 | shared_ctl->mp3_offs = byte_offs;\r |
51a902ae |
599 | \r |
abe0ea43 |
600 | // reset buffer pointers and stuff..\r |
51a902ae |
601 | mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r |
abe0ea43 |
602 | mp3_job_started = 0;\r |
51a902ae |
603 | shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r |
abe0ea43 |
604 | \r |
605 | if (!(PicoOpt&0x200)) mp3_start_local();\r |
cb0316e4 |
606 | }\r |
607 | \r |
608 | \r |
75736070 |
609 | int mp3_get_offset(void)\r |
610 | {\r |
da42200b |
611 | unsigned int offs1024 = 0;\r |
75736070 |
612 | int cdda_on;\r |
613 | \r |
1cd356a3 |
614 | cdda_on = (PicoMCD & 1) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r |
abe0ea43 |
615 | (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r |
75736070 |
616 | \r |
617 | if (cdda_on) {\r |
618 | offs1024 = shared_ctl->mp3_offs << 7;\r |
da42200b |
619 | offs1024 /= shared_ctl->mp3_len >> 3;\r |
75736070 |
620 | }\r |
da42200b |
621 | printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r |
75736070 |
622 | \r |
623 | return offs1024;\r |
624 | }\r |
625 | \r |
626 | \r |