1.10 release
[picodrive.git] / platform / gp2x / code940 / 940.c
CommitLineData
cc68a136 1#include "940shared.h"\r
2\r
42c7b147 3static _940_data_t *shared_data = (_940_data_t *) 0x00100000;\r
4static _940_ctl_t *shared_ctl = (_940_ctl_t *) 0x00200000;\r
5static unsigned char *mp3_data = (unsigned char *) 0x01000000;\r
cc68a136 6YM2612 *ym2612_940;\r
7int *mix_buffer;\r
8\r
9// from init.s\r
10void wait_irq(void);\r
11void spend_cycles(int c);\r
12void cache_clean(void);\r
13void 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
19void 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
42c7b147 26 // asm volatile ("mcr p15, 0, r0, c7, c10, 4" ::: "r0");\r
cc68a136 27\r
cc68a136 28\r
42c7b147 29 for (;;)\r
cc68a136 30 {\r
42c7b147 31 int job_num = 0;\r
cc68a136 32/*\r
33 while (!shared_ctl->busy)\r
34 {\r
35 //shared_ctl->waitc++;\r
42c7b147 36 spend_cycles(8*1024);\r
cc68a136 37 }\r
38*/\r
39 if (!shared_ctl->busy)\r
40 {\r
41 wait_irq();\r
42 }\r
43\r
b837b69b 44 for (job_num = 0; job_num < MAX_940JOBS; job_num++)\r
cc68a136 45 {\r
b837b69b 46 switch (shared_ctl->jobs[job_num])\r
47 {\r
42c7b147 48 case JOB940_INITALL:\r
49 /* ym2612 */\r
b837b69b 50 shared_ctl->writebuff0[0] = shared_ctl->writebuff1[0] = 0xffff;\r
51 YM2612Init_(shared_ctl->baseclock, shared_ctl->rate);\r
42c7b147 52 /* Helix mp3 decoder */\r
53 shared_data->mp3dec = MP3InitDecoder();\r
b837b69b 54 break;\r
cc68a136 55\r
b837b69b 56 case JOB940_YM2612RESETCHIP:\r
57 YM2612ResetChip_();\r
58 break;\r
cc68a136 59\r
b837b69b 60 case JOB940_PICOSTATELOAD:\r
61 YM2612PicoStateLoad_();\r
62 break;\r
cc68a136 63\r
b837b69b 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
cc68a136 71\r
b837b69b 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
cc68a136 83\r
b837b69b 84 YM2612UpdateOne_(0, shared_ctl->length, shared_ctl->stereo);\r
85 break;\r
86 }\r
42c7b147 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
cc68a136 122 }\r
123 }\r
124\r
b837b69b 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
42c7b147 128// cache_clean_flush();\r
129\r
130 shared_ctl->loopc++;\r
131 shared_ctl->busy = 0;\r
cc68a136 132 }\r
133}\r
b837b69b 134\r