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1 | #include "940shared.h"\r |
2 | \r |
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3 | static _940_data_t *shared_data = (_940_data_t *) 0x00100000;\r |
4 | static _940_ctl_t *shared_ctl = (_940_ctl_t *) 0x00200000;\r |
5 | static unsigned char *mp3_data = (unsigned char *) 0x01000000;\r |
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6 | YM2612 *ym2612_940;\r |
7 | int *mix_buffer;\r |
8 | \r |
9 | // from init.s\r |
10 | void wait_irq(void);\r |
11 | void spend_cycles(int c);\r |
12 | void cache_clean(void);\r |
13 | void cache_clean_flush(void);\r |
14 | \r |
15 | // asm volatile ("mov r0, #0" ::: "r0");\r |
16 | // asm volatile ("mcr p15, 0, r0, c7, c6, 0" ::: "r0"); /* flush dcache */\r |
17 | // asm volatile ("mcr p15, 0, r0, c7, c10, 4" ::: "r0"); /* drain write buffer */\r |
18 | \r |
19 | void Main940(int startvector)\r |
20 | {\r |
21 | ym2612_940 = &shared_data->ym2612;\r |
22 | mix_buffer = shared_data->mix_buffer;\r |
23 | \r |
24 | // debug\r |
25 | shared_ctl->vstarts[startvector]++;\r |
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26 | // asm volatile ("mcr p15, 0, r0, c7, c10, 4" ::: "r0");\r |
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27 | \r |
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28 | \r |
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29 | for (;;)\r |
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30 | {\r |
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31 | int job_num = 0;\r |
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32 | /*\r |
33 | while (!shared_ctl->busy)\r |
34 | {\r |
35 | //shared_ctl->waitc++;\r |
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36 | spend_cycles(8*1024);\r |
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37 | }\r |
38 | */\r |
39 | if (!shared_ctl->busy)\r |
40 | {\r |
41 | wait_irq();\r |
42 | }\r |
43 | \r |
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44 | for (job_num = 0; job_num < MAX_940JOBS; job_num++)\r |
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45 | {\r |
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46 | switch (shared_ctl->jobs[job_num])\r |
47 | {\r |
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48 | case JOB940_INITALL:\r |
49 | /* ym2612 */\r |
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50 | shared_ctl->writebuff0[0] = shared_ctl->writebuff1[0] = 0xffff;\r |
51 | YM2612Init_(shared_ctl->baseclock, shared_ctl->rate);\r |
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52 | /* Helix mp3 decoder */\r |
53 | shared_data->mp3dec = MP3InitDecoder();\r |
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54 | break;\r |
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55 | \r |
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56 | case JOB940_YM2612RESETCHIP:\r |
57 | YM2612ResetChip_();\r |
58 | break;\r |
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59 | \r |
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60 | case JOB940_PICOSTATELOAD:\r |
61 | YM2612PicoStateLoad_();\r |
62 | break;\r |
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63 | \r |
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64 | case JOB940_YM2612UPDATEONE: {\r |
65 | int i, dw, *wbuff;\r |
66 | if (shared_ctl->writebuffsel == 1) {\r |
67 | wbuff = (int *) shared_ctl->writebuff1;\r |
68 | } else {\r |
69 | wbuff = (int *) shared_ctl->writebuff0;\r |
70 | }\r |
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71 | \r |
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72 | /* playback all writes */\r |
73 | for (i = 2048/2; i > 0; i--) {\r |
74 | UINT16 d;\r |
75 | dw = *wbuff++;\r |
76 | d = dw;\r |
77 | if (d == 0xffff) break;\r |
78 | YM2612Write_(d >> 8, d);\r |
79 | d = (dw>>16);\r |
80 | if (d == 0xffff) break;\r |
81 | YM2612Write_(d >> 8, d);\r |
82 | }\r |
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83 | \r |
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84 | YM2612UpdateOne_(0, shared_ctl->length, shared_ctl->stereo);\r |
85 | break;\r |
86 | }\r |
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87 | \r |
88 | case JOB940_MP3DECODE: {\r |
89 | int mp3_offs = shared_ctl->mp3_offs;\r |
90 | unsigned char *readPtr = mp3_data + mp3_offs;\r |
91 | int bytesLeft = shared_ctl->mp3_len - mp3_offs;\r |
92 | int offset; // frame offset from readPtr\r |
93 | int err;\r |
94 | \r |
95 | if (bytesLeft <= 0) break; // EOF, nothing to do\r |
96 | \r |
97 | offset = MP3FindSyncWord(readPtr, bytesLeft);\r |
98 | if (offset < 0) {\r |
99 | shared_ctl->mp3_offs = shared_ctl->mp3_len;\r |
100 | break; // EOF\r |
101 | }\r |
102 | readPtr += offset;\r |
103 | bytesLeft -= offset;\r |
104 | \r |
105 | err = MP3Decode(shared_data->mp3dec, &readPtr, &bytesLeft,\r |
106 | shared_data->mp3_buffer[shared_ctl->mp3_buffsel], 0);\r |
107 | if (err) {\r |
108 | if (err == ERR_MP3_INDATA_UNDERFLOW) {\r |
109 | shared_ctl->mp3_offs = shared_ctl->mp3_len; // EOF\r |
110 | break;\r |
111 | } else if (err <= -6 && err >= -12) {\r |
112 | // ERR_MP3_INVALID_FRAMEHEADER, ERR_MP3_INVALID_*\r |
113 | // just try to skip the offending frame..\r |
114 | readPtr++;\r |
115 | }\r |
116 | shared_ctl->mp3_errors++;\r |
117 | shared_ctl->mp3_lasterr = err;\r |
118 | }\r |
119 | shared_ctl->mp3_offs = readPtr - mp3_data;\r |
120 | break;\r |
121 | }\r |
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122 | }\r |
123 | }\r |
124 | \r |
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125 | cache_clean();\r |
126 | // asm volatile ("mov r0, #0" ::: "r0");\r |
127 | // asm volatile ("mcr p15, 0, r0, c7, c10, 4" ::: "r0"); /* drain write buffer, should be done on nonbuffered write */\r |
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128 | // cache_clean_flush();\r |
129 | \r |
130 | shared_ctl->loopc++;\r |
131 | shared_ctl->busy = 0;\r |
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132 | }\r |
133 | }\r |
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134 | \r |