loading msgs, bugfixes
[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
cc68a136 7\r
8// from init.s\r
abe0ea43 9int wait_get_job(int oldjob);\r
cc68a136 10void spend_cycles(int c);\r
abe0ea43 11void dcache_clean(void);\r
12void dcache_clean_flush(void);\r
13void drain_wb(void);\r
51a902ae 14// this should help to resolve race confition where shared var\r
15// is changed by other core just before we update it\r
16void set_if_not_changed(int *val, int oldval, int newval);\r
cc68a136 17\r
18// asm volatile ("mov r0, #0" ::: "r0");\r
19// asm volatile ("mcr p15, 0, r0, c7, c6, 0" ::: "r0"); /* flush dcache */\r
20// asm volatile ("mcr p15, 0, r0, c7, c10, 4" ::: "r0"); /* drain write buffer */\r
21\r
51a902ae 22\r
23static void mp3_decode(void)\r
24{\r
25 int mp3_offs = shared_ctl->mp3_offs;\r
26 unsigned char *readPtr = mp3_data + mp3_offs;\r
27 int bytesLeft = shared_ctl->mp3_len - mp3_offs;\r
28 int offset; // frame offset from readPtr\r
29 int err;\r
30\r
31 if (bytesLeft <= 0) return; // EOF, nothing to do\r
32\r
33 offset = MP3FindSyncWord(readPtr, bytesLeft);\r
34 if (offset < 0) {\r
35 set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, shared_ctl->mp3_len);\r
36 return; // EOF\r
37 }\r
38 readPtr += offset;\r
39 bytesLeft -= offset;\r
40\r
41 err = MP3Decode(shared_data->mp3dec, &readPtr, &bytesLeft,\r
42 shared_data->mp3_buffer[shared_ctl->mp3_buffsel], 0);\r
43 if (err) {\r
44 if (err == ERR_MP3_INDATA_UNDERFLOW) {\r
51a902ae 45 set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, shared_ctl->mp3_len);\r
46 return;\r
47 } else if (err <= -6 && err >= -12) {\r
48 // ERR_MP3_INVALID_FRAMEHEADER, ERR_MP3_INVALID_*\r
49 // just try to skip the offending frame..\r
50 readPtr++;\r
51 }\r
52 shared_ctl->mp3_errors++;\r
53 shared_ctl->mp3_lasterr = err;\r
54 }\r
55 set_if_not_changed(&shared_ctl->mp3_offs, mp3_offs, readPtr - mp3_data);\r
56}\r
57\r
58\r
abe0ea43 59void Main940(void)\r
cc68a136 60{\r
abe0ea43 61 int *ym_buffer = shared_data->ym_buffer;\r
62 int job = 0;\r
cc68a136 63 ym2612_940 = &shared_data->ym2612;\r
cc68a136 64\r
cc68a136 65\r
abe0ea43 66 for (;;)\r
cc68a136 67 {\r
abe0ea43 68 job = wait_get_job(job);\r
69\r
70 shared_ctl->lastjob = job;\r
cc68a136 71\r
abe0ea43 72 switch (job)\r
cc68a136 73 {\r
abe0ea43 74 case JOB940_INITALL:\r
75 /* ym2612 */\r
76 shared_ctl->writebuff0[0] = shared_ctl->writebuff1[0] = 0xffff;\r
77 YM2612Init_(shared_ctl->baseclock, shared_ctl->rate);\r
78 /* Helix mp3 decoder */\r
79 shared_data->mp3dec = MP3InitDecoder();\r
80 break;\r
81\r
82 case JOB940_INVALIDATE_DCACHE:\r
83 drain_wb();\r
84 dcache_clean_flush();\r
85 break;\r
86\r
87 case JOB940_YM2612RESETCHIP:\r
88 YM2612ResetChip_();\r
89 break;\r
90\r
91 case JOB940_PICOSTATELOAD:\r
92 YM2612PicoStateLoad_();\r
93 break;\r
94\r
95 case JOB940_YM2612UPDATEONE: {\r
96 int i, dw, *wbuff;\r
97 if (shared_ctl->writebuffsel == 1) {\r
98 wbuff = (int *) shared_ctl->writebuff1;\r
99 } else {\r
100 wbuff = (int *) shared_ctl->writebuff0;\r
b837b69b 101 }\r
42c7b147 102\r
abe0ea43 103 /* playback all writes */\r
104 for (i = 2048/2; i > 0; i--) {\r
105 UINT16 d;\r
106 dw = *wbuff++;\r
107 d = dw;\r
108 if (d == 0xffff) break;\r
109 YM2612Write_(d >> 8, d);\r
110 d = (dw>>16);\r
111 if (d == 0xffff) break;\r
112 YM2612Write_(d >> 8, d);\r
113 }\r
114\r
85f8e929 115 shared_ctl->ym_active_chs =\r
116 YM2612UpdateOne_(ym_buffer, shared_ctl->length, shared_ctl->stereo, 1);\r
abe0ea43 117 break;\r
cc68a136 118 }\r
cc68a136 119\r
abe0ea43 120 case JOB940_MP3DECODE:\r
121 mp3_decode();\r
122 break;\r
123 }\r
42c7b147 124\r
125 shared_ctl->loopc++;\r
abe0ea43 126 dcache_clean();\r
cc68a136 127 }\r
128}\r
b837b69b 129\r