| 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 |
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