ce188d4d |
1 | // license:BSD-3-Clause\r |
2 | // copyright-holders:Aaron Giles\r |
3 | /***************************************************************************\r |
4 | \r |
5 | cdrom.h\r |
6 | \r |
7 | Generic MAME cd-rom implementation\r |
8 | \r |
9 | ***************************************************************************/\r |
10 | \r |
11 | #pragma once\r |
12 | \r |
13 | #ifndef __CDROM_H__\r |
14 | #define __CDROM_H__\r |
15 | \r |
16 | #include <stdint.h>\r |
17 | \r |
18 | \r |
19 | /***************************************************************************\r |
20 | CONSTANTS\r |
21 | ***************************************************************************/\r |
22 | \r |
23 | // tracks are padded to a multiple of this many frames\r |
24 | extern const uint32_t CD_TRACK_PADDING;\r |
25 | \r |
26 | #define CD_MAX_TRACKS (99) /* AFAIK the theoretical limit */\r |
27 | #define CD_MAX_SECTOR_DATA (2352)\r |
28 | #define CD_MAX_SUBCODE_DATA (96)\r |
29 | \r |
30 | #define CD_FRAME_SIZE (CD_MAX_SECTOR_DATA + CD_MAX_SUBCODE_DATA)\r |
31 | #define CD_FRAMES_PER_HUNK (8)\r |
32 | \r |
33 | #define CD_METADATA_WORDS (1+(CD_MAX_TRACKS * 6))\r |
34 | \r |
35 | enum\r |
36 | {\r |
37 | CD_TRACK_MODE1 = 0, /* mode 1 2048 bytes/sector */\r |
38 | CD_TRACK_MODE1_RAW, /* mode 1 2352 bytes/sector */\r |
39 | CD_TRACK_MODE2, /* mode 2 2336 bytes/sector */\r |
40 | CD_TRACK_MODE2_FORM1, /* mode 2 2048 bytes/sector */\r |
41 | CD_TRACK_MODE2_FORM2, /* mode 2 2324 bytes/sector */\r |
42 | CD_TRACK_MODE2_FORM_MIX, /* mode 2 2336 bytes/sector */\r |
43 | CD_TRACK_MODE2_RAW, /* mode 2 2352 bytes / sector */\r |
44 | CD_TRACK_AUDIO, /* redbook audio track 2352 bytes/sector (588 samples) */\r |
45 | \r |
46 | CD_TRACK_RAW_DONTCARE /* special flag for cdrom_read_data: just return me whatever is there */\r |
47 | };\r |
48 | \r |
49 | enum\r |
50 | {\r |
51 | CD_SUB_NORMAL = 0, /* "cooked" 96 bytes per sector */\r |
52 | CD_SUB_RAW, /* raw uninterleaved 96 bytes per sector */\r |
53 | CD_SUB_NONE /* no subcode data stored */\r |
54 | };\r |
55 | \r |
56 | #define CD_FLAG_GDROM 0x00000001 // disc is a GD-ROM, all tracks should be stored with GD-ROM metadata\r |
57 | #define CD_FLAG_GDROMLE 0x00000002 // legacy GD-ROM, with little-endian CDDA data\r |
58 | \r |
59 | /***************************************************************************\r |
60 | FUNCTION PROTOTYPES\r |
61 | ***************************************************************************/\r |
62 | \r |
63 | // ECC utilities\r |
64 | int ecc_verify(const uint8_t *sector);\r |
65 | void ecc_generate(uint8_t *sector);\r |
66 | void ecc_clear(uint8_t *sector);\r |
67 | \r |
68 | \r |
69 | \r |
70 | /***************************************************************************\r |
71 | INLINE FUNCTIONS\r |
72 | ***************************************************************************/\r |
73 | \r |
74 | static inline uint32_t msf_to_lba(uint32_t msf)\r |
75 | {\r |
76 | return ( ((msf&0x00ff0000)>>16) * 60 * 75) + (((msf&0x0000ff00)>>8) * 75) + ((msf&0x000000ff)>>0);\r |
77 | }\r |
78 | \r |
79 | static inline uint32_t lba_to_msf(uint32_t lba)\r |
80 | {\r |
81 | uint8_t m, s, f;\r |
82 | \r |
83 | m = lba / (60 * 75);\r |
84 | lba -= m * (60 * 75);\r |
85 | s = lba / 75;\r |
86 | f = lba % 75;\r |
87 | \r |
88 | return ((m / 10) << 20) | ((m % 10) << 16) |\r |
89 | ((s / 10) << 12) | ((s % 10) << 8) |\r |
90 | ((f / 10) << 4) | ((f % 10) << 0);\r |
91 | }\r |
92 | \r |
93 | // segacd needs it like this.. investigate\r |
94 | // Angelo also says PCE tracks often start playing at the\r |
95 | // wrong address.. related?\r |
96 | static inline uint32_t lba_to_msf_alt(int lba)\r |
97 | {\r |
98 | uint32_t ret = 0;\r |
99 | \r |
100 | ret |= ((lba / (60 * 75))&0xff)<<16;\r |
101 | ret |= (((lba / 75) % 60)&0xff)<<8;\r |
102 | ret |= ((lba % 75)&0xff)<<0;\r |
103 | \r |
104 | return ret;\r |
105 | }\r |
106 | \r |
107 | #endif // __CDROM_H__\r |