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1 | #include <stdio.h>\r |
2 | #include <stdlib.h>\r |
3 | #include <string.h>\r |
4 | #include <unistd.h>\r |
5 | #include <sys/mman.h>\r |
6 | #include <sys/ioctl.h>\r |
7 | #include <fcntl.h>\r |
8 | #include <errno.h>\r |
9 | \r |
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10 | #include "code940/940shared.h"\r |
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11 | #include "gp2x.h"\r |
12 | #include "emu.h"\r |
13 | #include "menu.h"\r |
14 | #include "asmutils.h"\r |
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15 | #include "../../Pico/PicoInt.h"\r |
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16 | \r |
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17 | // tmp\r |
18 | #include "../../Pico/sound/mix.h"\r |
19 | \r |
720ee7f6 |
20 | /* we will need some gp2x internals here */\r |
21 | extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */\r |
22 | extern volatile unsigned long *gp2x_memregl;\r |
23 | \r |
24 | static unsigned char *shared_mem = 0;\r |
25 | static _940_data_t *shared_data = 0;\r |
26 | static _940_ctl_t *shared_ctl = 0;\r |
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27 | static unsigned char *mp3_mem = 0;\r |
28 | \r |
29 | #define MP3_SIZE_MAX (0x1000000 - 4*640*480)\r |
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30 | \r |
31 | int crashed_940 = 0;\r |
32 | \r |
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33 | static FILE *loaded_mp3 = 0;\r |
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34 | \r |
35 | /***********************************************************/\r |
36 | \r |
37 | #define MAXOUT (+32767)\r |
38 | #define MINOUT (-32768)\r |
39 | \r |
40 | /* limitter */\r |
41 | #define Limit(val, max,min) { \\r |
42 | if ( val > max ) val = max; \\r |
43 | else if ( val < min ) val = min; \\r |
44 | }\r |
45 | \r |
46 | /* these will be managed locally on our side */\r |
47 | extern int *ym2612_dacen;\r |
48 | extern INT32 *ym2612_dacout;\r |
49 | extern void *ym2612_regs;\r |
50 | \r |
51 | static UINT8 *REGS = 0; /* we will also keep local copy of regs for savestates and such */\r |
52 | static INT32 addr_A1; /* address line A1 */\r |
53 | static int dacen;\r |
54 | static INT32 dacout;\r |
55 | static UINT8 ST_address; /* address register */\r |
56 | static UINT8 ST_status; /* status flag */\r |
57 | static UINT8 ST_mode; /* mode CSM / 3SLOT */\r |
58 | static int ST_TA; /* timer a */\r |
59 | static int ST_TAC; /* timer a maxval */\r |
60 | static int ST_TAT; /* timer a ticker */\r |
61 | static UINT8 ST_TB; /* timer b */\r |
62 | static int ST_TBC; /* timer b maxval */\r |
63 | static int ST_TBT; /* timer b ticker */\r |
64 | \r |
65 | static int writebuff_ptr = 0;\r |
66 | \r |
67 | \r |
68 | /* OPN Mode Register Write */\r |
69 | static void set_timers( int v )\r |
70 | {\r |
71 | /* b7 = CSM MODE */\r |
72 | /* b6 = 3 slot mode */\r |
73 | /* b5 = reset b */\r |
74 | /* b4 = reset a */\r |
75 | /* b3 = timer enable b */\r |
76 | /* b2 = timer enable a */\r |
77 | /* b1 = load b */\r |
78 | /* b0 = load a */\r |
79 | ST_mode = v;\r |
80 | \r |
81 | /* reset Timer b flag */\r |
82 | if( v & 0x20 )\r |
83 | ST_status &= ~2;\r |
84 | \r |
85 | /* reset Timer a flag */\r |
86 | if( v & 0x10 )\r |
87 | ST_status &= ~1;\r |
88 | }\r |
89 | \r |
90 | /* YM2612 write */\r |
91 | /* a = address */\r |
92 | /* v = value */\r |
93 | /* returns 1 if sample affecting state changed */\r |
94 | int YM2612Write_940(unsigned int a, unsigned int v)\r |
95 | {\r |
96 | int addr; //, ret=1;\r |
97 | \r |
98 | v &= 0xff; /* adjust to 8 bit bus */\r |
99 | a &= 3;\r |
100 | \r |
101 | switch( a ) {\r |
102 | case 0: /* address port 0 */\r |
103 | ST_address = v;\r |
104 | addr_A1 = 0;\r |
105 | //ret=0;\r |
106 | break;\r |
107 | \r |
108 | case 1: /* data port 0 */\r |
109 | if (addr_A1 != 0) {\r |
110 | return 0; /* verified on real YM2608 */\r |
111 | }\r |
112 | \r |
113 | addr = ST_address;\r |
114 | REGS[addr] = v;\r |
115 | \r |
116 | switch( addr & 0xf0 )\r |
117 | {\r |
118 | case 0x20: /* 0x20-0x2f Mode */\r |
119 | switch( addr )\r |
120 | {\r |
121 | case 0x24: { // timer A High 8\r |
122 | int TAnew = (ST_TA & 0x03)|(((int)v)<<2);\r |
123 | if(ST_TA != TAnew) {\r |
124 | // we should reset ticker only if new value is written. Outrun requires this.\r |
125 | ST_TA = TAnew;\r |
126 | ST_TAC = (1024-TAnew)*18;\r |
127 | ST_TAT = 0;\r |
128 | }\r |
129 | return 0;\r |
130 | }\r |
131 | case 0x25: { // timer A Low 2\r |
132 | int TAnew = (ST_TA & 0x3fc)|(v&3);\r |
133 | if(ST_TA != TAnew) {\r |
134 | ST_TA = TAnew;\r |
135 | ST_TAC = (1024-TAnew)*18;\r |
136 | ST_TAT = 0;\r |
137 | }\r |
138 | return 0;\r |
139 | }\r |
140 | case 0x26: // timer B\r |
141 | if(ST_TB != v) {\r |
142 | ST_TB = v;\r |
143 | ST_TBC = (256-v)<<4;\r |
144 | ST_TBC *= 18;\r |
145 | ST_TBT = 0;\r |
146 | }\r |
147 | return 0;\r |
148 | case 0x27: /* mode, timer control */\r |
149 | set_timers( v );\r |
150 | break; // other side needs ST.mode for 3slot mode\r |
151 | case 0x2a: /* DAC data (YM2612) */\r |
152 | dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */\r |
153 | return 0;\r |
154 | case 0x2b: /* DAC Sel (YM2612) */\r |
155 | /* b7 = dac enable */\r |
156 | dacen = v & 0x80;\r |
157 | break; // other side has to know this\r |
158 | default:\r |
159 | break;\r |
160 | }\r |
161 | break;\r |
162 | }\r |
163 | break;\r |
164 | \r |
165 | case 2: /* address port 1 */\r |
166 | ST_address = v;\r |
167 | addr_A1 = 1;\r |
168 | //ret=0;\r |
169 | break;\r |
170 | \r |
171 | case 3: /* data port 1 */\r |
172 | if (addr_A1 != 1) {\r |
173 | return 0; /* verified on real YM2608 */\r |
174 | }\r |
175 | \r |
176 | addr = ST_address | 0x100;\r |
177 | REGS[addr] = v;\r |
178 | break;\r |
179 | }\r |
180 | \r |
181 | if(currentConfig.EmuOpt & 4) {\r |
182 | /* queue this write for 940 */\r |
183 | if (writebuff_ptr < 2047) {\r |
184 | if (shared_ctl->writebuffsel == 1) {\r |
185 | shared_ctl->writebuff0[writebuff_ptr++] = (a<<8)|v;\r |
186 | } else {\r |
187 | shared_ctl->writebuff1[writebuff_ptr++] = (a<<8)|v;\r |
188 | }\r |
189 | } else {\r |
190 | printf("warning: writebuff_ptr > 2047\n");\r |
191 | }\r |
192 | }\r |
193 | \r |
194 | return 0; // cause the engine to do updates once per frame only\r |
195 | }\r |
196 | \r |
197 | UINT8 YM2612Read_940(void)\r |
198 | {\r |
199 | return ST_status;\r |
200 | }\r |
201 | \r |
202 | \r |
203 | int YM2612PicoTick_940(int n)\r |
204 | {\r |
205 | //int ret = 0;\r |
206 | \r |
207 | // timer A\r |
208 | if(ST_mode & 0x01 && (ST_TAT+=64*n) >= ST_TAC) {\r |
209 | ST_TAT -= ST_TAC;\r |
210 | if(ST_mode & 0x04) ST_status |= 1;\r |
211 | // CSM mode total level latch and auto key on\r |
212 | /* FIXME\r |
213 | if(ST_mode & 0x80) {\r |
214 | CSMKeyControll( &(ym2612_940->CH[2]) ); // Vectorman2, etc.\r |
215 | ret = 1;\r |
216 | }\r |
217 | */\r |
218 | }\r |
219 | \r |
220 | // timer B\r |
221 | if(ST_mode & 0x02 && (ST_TBT+=64*n) >= ST_TBC) {\r |
222 | ST_TBT -= ST_TBC;\r |
223 | if(ST_mode & 0x08) ST_status |= 2;\r |
224 | }\r |
225 | \r |
226 | return 0;\r |
227 | }\r |
228 | \r |
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229 | static int g_busy = 10;\r |
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230 | \r |
231 | static void wait_busy_940(void)\r |
232 | {\r |
233 | int i;\r |
234 | #if 0\r |
235 | printf("940 busy, entering wait loop.. (cnt: %i, wc: %i, ve: ", shared_ctl->loopc, shared_ctl->waitc);\r |
236 | for (i = 0; i < 8; i++)\r |
237 | printf("%i ", shared_ctl->vstarts[i]);\r |
238 | printf(")\n");\r |
239 | \r |
240 | for (i = 0; shared_ctl->busy; i++)\r |
241 | {\r |
242 | spend_cycles(1024); /* needs tuning */\r |
243 | }\r |
244 | printf("wait iterations: %i\n", i);\r |
245 | #else\r |
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246 | for (i = 0; /*shared_ctl->busy*/gp2x_memregs[0x3B3E>>1] && i < 0x10000; i++)\r |
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247 | spend_cycles(8*1024); // tested to be best for mp3 dec\r |
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248 | //printf("i = 0x%x\n", i);\r |
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249 | if (i < 0x10000) return;\r |
250 | \r |
251 | /* 940 crashed */\r |
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252 | printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r |
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253 | for (i = 0; i < 8; i++)\r |
254 | printf("%i ", shared_ctl->vstarts[i]);\r |
255 | printf(")\n");\r |
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256 | printf("irq pending flags: DUALCPU %04x (see 15?), SRCPND %08lx (see 26), INTPND %08lx\n",\r |
257 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
258 | printf("last irq PC: %08x, lastjob: 0x%03x, busy: %x, lastbusy: %x, g_busy: %x\n", shared_ctl->last_irq_pc,\r |
259 | shared_ctl->lastjob, gp2x_memregs[0x3B3E>>1]/*shared_ctl->busy*/, shared_ctl->lastbusy, g_busy);\r |
260 | printf("trying to interrupt..\n");\r |
261 | gp2x_memregs[0x3B3E>>1] = 0xffff;\r |
262 | for (i = 0; /*shared_ctl->busy*/gp2x_memregs[0x3B3E>>1] && i < 0x10000; i++)\r |
263 | spend_cycles(8*1024);\r |
264 | printf("i = 0x%x\n", i);\r |
265 | printf("irq pending flags: DUALCPU %04x (see 15?), SRCPND %08lx (see 26), INTPND %08lx\n",\r |
266 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r |
267 | printf("last irq PC: %08x, lastjob: 0x%03x, busy: %x\n", shared_ctl->last_irq_pc, shared_ctl->lastjob, gp2x_memregs[0x3B3E>>1]/*shared_ctl->busy*/);\r |
268 | \r |
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269 | strcpy(menuErrorMsg, "940 crashed.");\r |
270 | engineState = PGS_Menu;\r |
271 | crashed_940 = 1;\r |
272 | #endif\r |
273 | }\r |
274 | \r |
275 | \r |
8dfb9fd5 |
276 | static void add_job_940(int job0, int job1)\r |
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277 | {\r |
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278 | /* if (gp2x_memregs[0x3b46>>1] || shared_ctl->busy)\r |
279 | {\r |
280 | printf("!!add_job_940: irq pending flags: DUALCPU %04x (see 15?), SRCPND %08lx (see 26), INTPND %08lx, busy: %x\n",\r |
281 | gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2], shared_ctl->busy);\r |
282 | }\r |
283 | */\r |
8dfb9fd5 |
284 | shared_ctl->jobs[0] = job0;\r |
285 | shared_ctl->jobs[1] = job1;\r |
49fe50f0 |
286 | //shared_ctl->busy = ++g_busy; // 1;\r |
287 | gp2x_memregs[0x3B3E>>1] = ++g_busy; // set busy flag\r |
288 | // gp2x_memregs[0x3B3E>>1] = 0xffff; // cause interrupt\r |
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289 | }\r |
290 | \r |
291 | \r |
292 | void YM2612PicoStateLoad_940(void)\r |
293 | {\r |
294 | int i, old_A1 = addr_A1;\r |
295 | \r |
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296 | if (/*shared_ctl->busy*/gp2x_memregs[0x3B3E>>1]) wait_busy_940();\r |
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297 | \r |
298 | // feed all the registers and update internal state\r |
299 | for(i = 0; i < 0x100; i++) {\r |
300 | YM2612Write_940(0, i);\r |
301 | YM2612Write_940(1, REGS[i]);\r |
302 | }\r |
303 | for(i = 0; i < 0x100; i++) {\r |
304 | YM2612Write_940(2, i);\r |
305 | YM2612Write_940(3, REGS[i|0x100]);\r |
306 | }\r |
307 | \r |
308 | addr_A1 = old_A1;\r |
309 | \r |
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310 | add_job_940(JOB940_PICOSTATELOAD, 0);\r |
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311 | }\r |
312 | \r |
313 | \r |
314 | static void internal_reset(void)\r |
315 | {\r |
316 | writebuff_ptr = 0;\r |
317 | ST_mode = 0;\r |
318 | ST_status = 0; /* normal mode */\r |
319 | ST_TA = 0;\r |
320 | ST_TAC = 0;\r |
321 | ST_TB = 0;\r |
322 | ST_TBC = 0;\r |
323 | dacen = 0;\r |
324 | }\r |
325 | \r |
326 | \r |
327 | extern char **g_argv;\r |
328 | \r |
329 | /* none of the functions in this file should be called before this one */\r |
330 | void YM2612Init_940(int baseclock, int rate)\r |
331 | {\r |
332 | printf("YM2612Init_940()\n");\r |
8dfb9fd5 |
333 | printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r |
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334 | \r |
8dfb9fd5 |
335 | Reset940(1, 2);\r |
720ee7f6 |
336 | Pause940(1);\r |
337 | \r |
49fe50f0 |
338 | gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r |
339 | gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r |
720ee7f6 |
340 | \r |
341 | if (shared_mem == NULL)\r |
342 | {\r |
8dfb9fd5 |
343 | shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r |
720ee7f6 |
344 | if(shared_mem == MAP_FAILED)\r |
345 | {\r |
346 | printf("mmap(shared_data) failed with %i\n", errno);\r |
347 | exit(1);\r |
348 | }\r |
349 | shared_data = (_940_data_t *) (shared_mem+0x100000);\r |
350 | /* this area must not get buffered on either side */\r |
351 | shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r |
598e7c06 |
352 | mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x3000000);\r |
353 | if (mp3_mem == MAP_FAILED)\r |
354 | {\r |
355 | printf("mmap(mp3_mem) failed with %i\n", errno);\r |
356 | exit(1);\r |
357 | }\r |
720ee7f6 |
358 | crashed_940 = 1;\r |
359 | }\r |
360 | \r |
361 | if (crashed_940)\r |
362 | {\r |
363 | unsigned char ucData[1024];\r |
364 | int nRead, i, nLen = 0;\r |
365 | char binpath[1024];\r |
366 | FILE *fp;\r |
367 | \r |
368 | strncpy(binpath, g_argv[0], 1023);\r |
369 | binpath[1023] = 0;\r |
370 | for (i = strlen(binpath); i > 0; i--)\r |
371 | if (binpath[i] == '/') { binpath[i] = 0; break; }\r |
372 | strcat(binpath, "/code940.bin");\r |
373 | \r |
374 | fp = fopen(binpath, "rb");\r |
375 | if(!fp)\r |
376 | {\r |
377 | memset(gp2x_screen, 0, 320*240);\r |
378 | gp2x_text_out8(10, 100, "failed to open required file:");\r |
379 | gp2x_text_out8(10, 110, "code940.bin");\r |
380 | gp2x_video_flip();\r |
381 | printf("failed to open %s\n", binpath);\r |
382 | exit(1);\r |
383 | }\r |
384 | \r |
385 | while(1)\r |
386 | {\r |
387 | nRead = fread(ucData, 1, 1024, fp);\r |
388 | if(nRead <= 0)\r |
389 | break;\r |
390 | memcpy(shared_mem + nLen, ucData, nRead);\r |
391 | nLen += nRead;\r |
392 | }\r |
393 | fclose(fp);\r |
394 | crashed_940 = 0;\r |
395 | }\r |
396 | \r |
397 | memset(shared_data, 0, sizeof(*shared_data));\r |
398 | memset(shared_ctl, 0, sizeof(*shared_ctl));\r |
399 | \r |
400 | REGS = YM2612GetRegs();\r |
401 | \r |
402 | ym2612_dacen = &dacen;\r |
403 | ym2612_dacout = &dacout;\r |
404 | \r |
405 | internal_reset();\r |
406 | \r |
979ba09f |
407 | loaded_mp3 = 0;\r |
408 | \r |
720ee7f6 |
409 | /* now cause 940 to init it's ym2612 stuff */\r |
410 | shared_ctl->baseclock = baseclock;\r |
411 | shared_ctl->rate = rate;\r |
b30a8e67 |
412 | shared_ctl->jobs[0] = JOB940_INITALL;\r |
8dfb9fd5 |
413 | shared_ctl->jobs[1] = 0;\r |
49fe50f0 |
414 | //shared_ctl->busy = 1;\r |
415 | gp2x_memregs[0x3B3E>>1] = 1; // set busy flag\r |
416 | \r |
417 | gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r |
418 | gp2x_memregl[0x4500>>2] = 0; // clear pending IRQs in SRCPND\r |
419 | gp2x_memregl[0x4510>>2] = 0; // clear pending IRQs in INTPND\r |
420 | gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r |
720ee7f6 |
421 | \r |
422 | /* start the 940 */\r |
8dfb9fd5 |
423 | Reset940(0, 2);\r |
720ee7f6 |
424 | Pause940(0);\r |
425 | \r |
426 | // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r |
427 | }\r |
428 | \r |
429 | \r |
430 | void YM2612ResetChip_940(void)\r |
431 | {\r |
432 | printf("YM2612ResetChip_940()\n");\r |
433 | if (shared_data == NULL) {\r |
434 | printf("YM2612ResetChip_940: reset before init?\n");\r |
435 | return;\r |
436 | }\r |
437 | \r |
49fe50f0 |
438 | if (/*shared_ctl->busy*/gp2x_memregs[0x3B3E>>1]) wait_busy_940();\r |
720ee7f6 |
439 | \r |
440 | internal_reset();\r |
441 | \r |
8dfb9fd5 |
442 | add_job_940(JOB940_YM2612RESETCHIP, 0);\r |
720ee7f6 |
443 | }\r |
444 | \r |
445 | \r |
49fe50f0 |
446 | //extern int pcm_buffer[2*44100/50];\r |
447 | /*\r |
448 | static void mix_samples(int *dest_buf, short *mp3_buf, int len, int stereo)\r |
598e7c06 |
449 | {\r |
49fe50f0 |
450 | // int *pcm = pcm_buffer + offset * 2;\r |
451 | \r |
452 | if (stereo)\r |
598e7c06 |
453 | {\r |
49fe50f0 |
454 | for (; len > 0; len--)\r |
598e7c06 |
455 | {\r |
49fe50f0 |
456 | int lm, rm;\r |
457 | lm = *mp3_buf++; rm = *mp3_buf++;\r |
458 | *dest_buf++ += lm - lm/2; *dest_buf++ += rm - rm/2;\r |
598e7c06 |
459 | }\r |
49fe50f0 |
460 | } else {\r |
461 | for (; len > 0; len--)\r |
598e7c06 |
462 | {\r |
49fe50f0 |
463 | int l = *mp3_buf++;\r |
464 | *dest_buf++ = l - l/2;\r |
598e7c06 |
465 | }\r |
466 | }\r |
467 | }\r |
49fe50f0 |
468 | */\r |
598e7c06 |
469 | \r |
470 | // here we assume that length is different between games, but constant in one game\r |
471 | \r |
979ba09f |
472 | static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r |
473 | static int mp3_play_bufsel = 0;\r |
598e7c06 |
474 | \r |
49fe50f0 |
475 | int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r |
720ee7f6 |
476 | {\r |
49fe50f0 |
477 | int length_mp3 = Pico.m.pal ? 44100/50 : 44100/60; // mp3s are locked to 44100Hz stereo\r |
478 | int *ym_buf = shared_data->mix_buffer;\r |
479 | // int *dest_buf = buffer;\r |
480 | int cdda_on, mp3_job = 0;\r |
481 | // int len;\r |
482 | \r |
483 | // emulating CD, enabled in opts, not data track, CDC is reading, playback was started, track not ended\r |
484 | cdda_on = (PicoMCD & 1) && (PicoOpt & 0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r |
485 | (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r |
720ee7f6 |
486 | \r |
487 | //printf("YM2612UpdateOne_940()\n");\r |
49fe50f0 |
488 | if (/*shared_ctl->busy*/gp2x_memregs[0x3B3E>>1]) wait_busy_940();\r |
720ee7f6 |
489 | \r |
49fe50f0 |
490 | // track ended?\r |
491 | cdda_on = cdda_on && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r |
720ee7f6 |
492 | \r |
49fe50f0 |
493 | // mix in ym buffer\r |
494 | if (is_buf_empty) memcpy32(buffer, ym_buf, length<<stereo);\r |
495 | // else TODO\r |
496 | \r |
497 | // for (len = length << stereo; len > 0; len--)\r |
498 | // {\r |
499 | // *dest_buf++ += *ym_buf++;\r |
500 | // }\r |
598e7c06 |
501 | \r |
49fe50f0 |
502 | /* mix mp3 data, only stereo */\r |
503 | if (cdda_on && mp3_samples_ready >= length_mp3)\r |
598e7c06 |
504 | {\r |
49fe50f0 |
505 | int shr = 0;\r |
506 | void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r |
507 | if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r |
508 | else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r |
598e7c06 |
509 | \r |
49fe50f0 |
510 | if (1152 - mp3_buffer_offs >= length_mp3) {\r |
511 | mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, (length_mp3>>shr)<<1);\r |
512 | \r |
513 | mp3_buffer_offs += length_mp3;\r |
598e7c06 |
514 | } else {\r |
515 | // collect from both buffers..\r |
516 | int left = 1152 - mp3_buffer_offs;\r |
49fe50f0 |
517 | if (mp3_play_bufsel == 0)\r |
518 | {\r |
519 | mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, (length_mp3>>shr)<<1);\r |
520 | mp3_buffer_offs = length_mp3 - left;\r |
521 | mp3_play_bufsel = 1;\r |
522 | } else {\r |
523 | mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r |
524 | mp3_buffer_offs = length_mp3 - left;\r |
525 | mix_samples(buffer + ((left>>shr)<<1),\r |
526 | shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r |
527 | mp3_play_bufsel = 0;\r |
528 | }\r |
720ee7f6 |
529 | }\r |
49fe50f0 |
530 | mp3_samples_ready -= length_mp3;\r |
720ee7f6 |
531 | }\r |
532 | \r |
720ee7f6 |
533 | if (shared_ctl->writebuffsel == 1) {\r |
534 | shared_ctl->writebuff0[writebuff_ptr] = 0xffff;\r |
535 | } else {\r |
536 | shared_ctl->writebuff1[writebuff_ptr] = 0xffff;\r |
537 | }\r |
538 | writebuff_ptr = 0;\r |
539 | \r |
598e7c06 |
540 | /* give 940 ym job */\r |
720ee7f6 |
541 | shared_ctl->writebuffsel ^= 1;\r |
542 | shared_ctl->length = length;\r |
543 | shared_ctl->stereo = stereo;\r |
598e7c06 |
544 | \r |
545 | // make sure we will have enough mp3 samples next frame\r |
49fe50f0 |
546 | if (cdda_on && mp3_samples_ready < length_mp3)\r |
598e7c06 |
547 | {\r |
548 | shared_ctl->mp3_buffsel ^= 1;\r |
549 | mp3_job = JOB940_MP3DECODE;\r |
550 | mp3_samples_ready += 1152;\r |
551 | }\r |
552 | \r |
553 | add_job_940(JOB940_YM2612UPDATEONE, mp3_job);\r |
720ee7f6 |
554 | //spend_cycles(512);\r |
555 | //printf("SRCPND: %08lx, INTMODE: %08lx, INTMASK: %08lx, INTPEND: %08lx\n",\r |
556 | // gp2x_memregl[0x4500>>2], gp2x_memregl[0x4504>>2], gp2x_memregl[0x4508>>2], gp2x_memregl[0x4510>>2]);\r |
49fe50f0 |
557 | \r |
558 | return 1;\r |
720ee7f6 |
559 | }\r |
598e7c06 |
560 | \r |
561 | \r |
562 | /***********************************************************/\r |
563 | \r |
564 | void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r |
565 | {\r |
566 | int byte_offs = 0;\r |
567 | \r |
7bc9cd7f |
568 | if (!(PicoOpt&0x800)) { // cdda disabled?\r |
598e7c06 |
569 | return;\r |
570 | }\r |
571 | \r |
572 | if (loaded_mp3 != f)\r |
573 | {\r |
49fe50f0 |
574 | // printf("loading mp3... "); fflush(stdout);\r |
598e7c06 |
575 | fseek(f, 0, SEEK_SET);\r |
576 | fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r |
49fe50f0 |
577 | // if (feof(f)) printf("done.\n");\r |
578 | // else printf("done. mp3 too large, not all data loaded.\n");\r |
598e7c06 |
579 | shared_ctl->mp3_len = ftell(f);\r |
580 | loaded_mp3 = f;\r |
581 | }\r |
582 | \r |
583 | // seek..\r |
584 | if (pos) {\r |
585 | byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r |
586 | byte_offs *= pos;\r |
587 | byte_offs >>= 6;\r |
588 | }\r |
49fe50f0 |
589 | // printf("mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r |
598e7c06 |
590 | \r |
591 | shared_ctl->mp3_offs = byte_offs;\r |
979ba09f |
592 | \r |
593 | // reset buffer pointers..\r |
594 | mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r |
595 | shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r |
598e7c06 |
596 | }\r |
597 | \r |
598 | \r |
98c9d8d9 |
599 | int mp3_get_offset(void)\r |
600 | {\r |
601 | int offs1024 = 0;\r |
602 | int cdda_on;\r |
603 | \r |
7bc9cd7f |
604 | cdda_on = (PicoMCD & 1) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r |
98c9d8d9 |
605 | (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r |
606 | \r |
607 | if (cdda_on) {\r |
608 | offs1024 = shared_ctl->mp3_offs << 7;\r |
609 | offs1024 /= shared_ctl->mp3_len;\r |
610 | offs1024 <<= 3;\r |
611 | }\r |
612 | printf("offs1024=%i (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r |
613 | \r |
614 | return offs1024;\r |
615 | }\r |
616 | \r |
617 | \r |