nkeynes@678 | 1 | /**
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nkeynes@729 | 2 | * $Id$
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nkeynes@678 | 3 | *
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nkeynes@678 | 4 | * This file defines the structures and functions used by the GD-Rom
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nkeynes@678 | 5 | * disc drivers. (ie, the modules that supply a CD image to be used by the
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nkeynes@678 | 6 | * system).
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nkeynes@678 | 7 | *
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nkeynes@678 | 8 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@678 | 9 | *
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nkeynes@678 | 10 | * This program is free software; you can redistribute it and/or modify
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nkeynes@678 | 11 | * it under the terms of the GNU General Public License as published by
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nkeynes@678 | 12 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@678 | 13 | * (at your option) any later version.
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nkeynes@678 | 14 | *
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nkeynes@678 | 15 | * This program is distributed in the hope that it will be useful,
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nkeynes@678 | 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@678 | 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@678 | 18 | * GNU General Public License for more details.
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nkeynes@678 | 19 | */
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nkeynes@678 | 20 |
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nkeynes@736 | 21 | #ifndef lxdream_gddriver_H
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nkeynes@736 | 22 | #define lxdream_gddriver_H 1
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nkeynes@678 | 23 |
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nkeynes@678 | 24 | #include <stdio.h>
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nkeynes@678 | 25 | #include "lxdream.h"
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nkeynes@678 | 26 | #include "gdrom/gdrom.h"
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nkeynes@678 | 27 | #include <glib/gstrfuncs.h>
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nkeynes@678 | 28 |
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nkeynes@736 | 29 | #ifdef __cplusplus
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nkeynes@736 | 30 | extern "C" {
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nkeynes@736 | 31 | #endif
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nkeynes@736 | 32 |
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nkeynes@678 | 33 | #define MAX_SECTOR_SIZE 2352
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nkeynes@678 | 34 |
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nkeynes@720 | 35 | #define CD_FRAMES_PER_SECOND 75
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nkeynes@720 | 36 | #define CD_SECONDS_PER_MINUTE 60
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nkeynes@720 | 37 | #define CD_FRAMES_PER_MINUTE (CD_FRAMES_PER_SECOND*CD_SECONDS_PER_MINUTE)
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nkeynes@709 | 38 |
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nkeynes@678 | 39 | struct gdrom_toc {
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nkeynes@678 | 40 | uint32_t track[99];
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nkeynes@678 | 41 | uint32_t first, last, leadout;
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nkeynes@678 | 42 | };
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nkeynes@678 | 43 |
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nkeynes@678 | 44 | #define GDROM_PREGAP 150 /* Sectors */
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nkeynes@678 | 45 |
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nkeynes@678 | 46 | extern uint32_t gdrom_sector_size[];
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nkeynes@678 | 47 | #define GDROM_SECTOR_SIZE(x) gdrom_sector_size[x]
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nkeynes@678 | 48 | /**
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nkeynes@678 | 49 | * Track data type enumeration for cd images and devices. This somewhat
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nkeynes@678 | 50 | * conflates the real track mode with the format of the image file, but
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nkeynes@678 | 51 | * it manages to make sense so far.
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nkeynes@678 | 52 | */
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nkeynes@678 | 53 | typedef enum {
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nkeynes@678 | 54 | GDROM_MODE0, // Mode 0 - should never actually see this
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nkeynes@736 | 55 | /* Data-only modes (image file contains only the user data) */
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nkeynes@678 | 56 | GDROM_MODE1, // Standard CD-Rom Mode 1 data track
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nkeynes@678 | 57 | GDROM_MODE2_FORMLESS, // Mode 2 data track with no sub-structure (rare)
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nkeynes@678 | 58 | GDROM_MODE2_FORM1, // Mode 2/Form 1 data track (standard for multisession)
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nkeynes@678 | 59 | GDROM_MODE2_FORM2, // Mode 2/Form 2 data track (also fairly uncommon).
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nkeynes@678 | 60 | GDROM_CDDA, // Standard audio track
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nkeynes@678 | 61 |
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nkeynes@736 | 62 | /* This one is somewhat special - the image file contains the 2336 bytes of
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nkeynes@736 | 63 | * "extended user data", which in turn contains either a form 1 or form 2
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nkeynes@736 | 64 | * sector. In other words it's a raw mode2 XA sector without the 16-byte header.
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nkeynes@736 | 65 | */
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nkeynes@678 | 66 | GDROM_SEMIRAW_MODE2,
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nkeynes@736 | 67 | /* Raw modes (image contains the full 2352-byte sector). Split into XA/Non-XA
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nkeynes@736 | 68 | * here for convenience, although it's really a session level flag. */
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nkeynes@678 | 69 | GDROM_RAW_XA,
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nkeynes@678 | 70 | GDROM_RAW_NONXA,
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nkeynes@678 | 71 | } gdrom_track_mode_t;
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nkeynes@678 | 72 |
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nkeynes@678 | 73 | /* The disc register indicates the current contents of the drive. When open
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nkeynes@678 | 74 | * contains 0x06.
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nkeynes@678 | 75 | */
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nkeynes@678 | 76 | #define IDE_DISC_READY 0x01 /* ored with above */
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nkeynes@678 | 77 | #define IDE_DISC_IDLE 0x02 /* ie spun-down */
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nkeynes@678 | 78 | #define IDE_DISC_NONE 0x06
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nkeynes@678 | 79 |
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nkeynes@678 | 80 | #define IDE_DISC_AUDIO 0x00
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nkeynes@678 | 81 | #define IDE_DISC_CDROM 0x10
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nkeynes@678 | 82 | #define IDE_DISC_CDROMXA 0x20
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nkeynes@678 | 83 | #define IDE_DISC_GDROM 0x80
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nkeynes@678 | 84 |
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nkeynes@678 | 85 | #define TRACK_PRE_EMPHASIS 0x10
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nkeynes@678 | 86 | #define TRACK_COPY_PERMITTED 0x20
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nkeynes@678 | 87 | #define TRACK_DATA 0x40
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nkeynes@678 | 88 | #define TRACK_FOUR_CHANNEL 0x80
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nkeynes@678 | 89 |
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nkeynes@678 | 90 | typedef struct gdrom_track {
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nkeynes@678 | 91 | gdrom_track_mode_t mode;
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nkeynes@678 | 92 | uint8_t flags; /* Track flags */
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nkeynes@678 | 93 | int session; /* session # containing this track */
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nkeynes@678 | 94 | uint32_t lba; /* start sector address */
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nkeynes@678 | 95 | uint32_t sector_size; /* For convenience, determined by mode */
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nkeynes@678 | 96 | uint32_t sector_count;
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nkeynes@678 | 97 | uint32_t offset; /* File offset of start of track - image files only */
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nkeynes@678 | 98 | FILE *file;
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nkeynes@678 | 99 | } *gdrom_track_t;
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nkeynes@678 | 100 |
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nkeynes@678 | 101 | struct gdrom_disc {
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nkeynes@678 | 102 | /**
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nkeynes@678 | 103 | * Read a single sector from the disc at the specified logical address.
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nkeynes@678 | 104 | * @param disc pointer to the disc structure
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nkeynes@678 | 105 | * @param lba logical address to read from
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nkeynes@678 | 106 | * @param mode mode field from the read command
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nkeynes@678 | 107 | * @param buf buffer to receive data (at least MAX_SECTOR_SIZE bytes)
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nkeynes@678 | 108 | * @param length unsigned int to receive the number of bytes actually read.
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nkeynes@678 | 109 | * @return PKT_ERR_OK on success, or another PKT_ERR_* code on failure.
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nkeynes@678 | 110 | */
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nkeynes@678 | 111 | gdrom_error_t (*read_sector)( struct gdrom_disc *disc,
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nkeynes@736 | 112 | uint32_t lba, int mode,
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nkeynes@736 | 113 | unsigned char *buf, uint32_t *length );
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nkeynes@736 | 114 |
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nkeynes@678 | 115 | /**
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nkeynes@678 | 116 | * Read the TOC from the disc and write it into the specified buffer.
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nkeynes@678 | 117 | * The method is responsible for returning the data in gd-rom
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nkeynes@678 | 118 | * format.
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nkeynes@678 | 119 | * @param disc pointer to the disc structure
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nkeynes@678 | 120 | * @param buf buffer to receive data (0x198 bytes long)
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nkeynes@678 | 121 | */
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nkeynes@678 | 122 | gdrom_error_t (*read_toc)(struct gdrom_disc *disc, unsigned char *buf);
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nkeynes@678 | 123 |
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nkeynes@678 | 124 | /**
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nkeynes@678 | 125 | * Read the information for the specified sector and return it in the
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nkeynes@678 | 126 | * supplied buffer.
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nkeynes@678 | 127 | * @param disc pointer to the disc structure
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nkeynes@678 | 128 | * @param session of interest. If 0, return end of disc information.
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nkeynes@678 | 129 | * @param buf buffer to receive data (6 bytes)
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nkeynes@678 | 130 | */
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nkeynes@678 | 131 | gdrom_error_t (*read_session)(struct gdrom_disc *disc, int session, unsigned char *buf);
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nkeynes@678 | 132 |
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nkeynes@678 | 133 | /**
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nkeynes@678 | 134 | * Read the position information (subchannel) for the specified sector
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nkeynes@678 | 135 | * and return it in the supplied buffer. This method does not need to
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nkeynes@678 | 136 | * write the first 4 bytes of the buffer.
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nkeynes@678 | 137 | * @param disc pointer to the disc structure
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nkeynes@678 | 138 | * @param lba sector to get position information for
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nkeynes@678 | 139 | * @param buf buffer to receive data (14 bytes)
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nkeynes@678 | 140 | */
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nkeynes@678 | 141 | gdrom_error_t (*read_position)(struct gdrom_disc *disc, uint32_t lba, unsigned char *buf);
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nkeynes@678 | 142 |
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nkeynes@678 | 143 | /**
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nkeynes@678 | 144 | * Return the current disc status, expressed as a combination of the
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nkeynes@678 | 145 | * IDE_DISC_* flags above.
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nkeynes@678 | 146 | * @param disc pointer to the disc structure
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nkeynes@678 | 147 | * @return an integer status value.
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nkeynes@678 | 148 | */
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nkeynes@678 | 149 | int (*drive_status)(struct gdrom_disc *disc);
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nkeynes@678 | 150 |
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nkeynes@678 | 151 | /**
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nkeynes@678 | 152 | * Begin playing audio from the given lba address on the disc.
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nkeynes@678 | 153 | */
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nkeynes@678 | 154 | gdrom_error_t (*play_audio)(struct gdrom_disc *disc, uint32_t lba, uint32_t endlba);
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nkeynes@678 | 155 |
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nkeynes@678 | 156 | /**
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nkeynes@678 | 157 | * Executed once per time slice to perform house-keeping operations
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nkeynes@678 | 158 | * (checking disc status, media changed, etc).
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nkeynes@678 | 159 | */
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nkeynes@678 | 160 | uint32_t (*run_time_slice)( struct gdrom_disc *disc, uint32_t nanosecs );
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nkeynes@678 | 161 |
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nkeynes@678 | 162 | /**
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nkeynes@678 | 163 | * Close the disc and release any storage or resources allocated including
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nkeynes@678 | 164 | * the disc structure itself.
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nkeynes@678 | 165 | */
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nkeynes@678 | 166 | void (*close)( struct gdrom_disc *disc );
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nkeynes@678 | 167 | const gchar *name; /* Device name / Image filename */
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nkeynes@837 | 168 | char title[129]; /* Disc title (if any) */
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nkeynes@678 | 169 | };
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nkeynes@678 | 170 |
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nkeynes@678 | 171 | typedef struct gdrom_image {
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nkeynes@678 | 172 | struct gdrom_disc disc;
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nkeynes@678 | 173 | int disc_type;
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nkeynes@678 | 174 | int track_count;
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nkeynes@678 | 175 | struct gdrom_track track[99];
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nkeynes@678 | 176 | gchar mcn[14]; /* Media catalogue number */
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nkeynes@678 | 177 | FILE *file; /* Open file stream */
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nkeynes@720 | 178 | void *private; /* image private data */
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nkeynes@678 | 179 | } *gdrom_image_t;
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nkeynes@678 | 180 |
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nkeynes@678 | 181 | /**
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nkeynes@678 | 182 | *
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nkeynes@678 | 183 | */
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nkeynes@678 | 184 | typedef struct gdrom_image_class {
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nkeynes@678 | 185 | const gchar *name;
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nkeynes@678 | 186 | const gchar *extension;
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nkeynes@678 | 187 | gboolean (*is_valid_file)(FILE *f);
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nkeynes@678 | 188 | gdrom_disc_t (*open_image_file)(const gchar *filename, FILE *f);
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nkeynes@678 | 189 | } *gdrom_image_class_t;
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nkeynes@678 | 190 |
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nkeynes@678 | 191 | extern struct gdrom_image_class nrg_image_class;
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nkeynes@678 | 192 | extern struct gdrom_image_class cdi_image_class;
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nkeynes@678 | 193 | extern struct gdrom_image_class gdi_image_class;
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nkeynes@678 | 194 | extern struct gdrom_image_class cdrom_device_class;
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nkeynes@678 | 195 |
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nkeynes@678 | 196 | /**
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nkeynes@678 | 197 | * Construct a new image file using the default methods.
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nkeynes@678 | 198 | */
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nkeynes@678 | 199 | gdrom_disc_t gdrom_image_new( const gchar *filename, FILE *f );
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nkeynes@678 | 200 |
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nkeynes@678 | 201 | /**
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nkeynes@678 | 202 | * Destroy an image data structure without closing the file
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nkeynes@678 | 203 | * (Intended for use from image loaders only)
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nkeynes@678 | 204 | */
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nkeynes@678 | 205 | void gdrom_image_destroy_no_close( gdrom_disc_t d );
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nkeynes@678 | 206 |
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nkeynes@782 | 207 | /**
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nkeynes@782 | 208 | * Determine the track number containing the specified sector by lba.
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nkeynes@782 | 209 | */
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nkeynes@782 | 210 | int gdrom_image_get_track_by_lba( gdrom_image_t image, uint32_t lba );
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nkeynes@678 | 211 |
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nkeynes@678 | 212 | /**
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nkeynes@678 | 213 | * Given a base filename (eg for a .cue file), generate the path for the given
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nkeynes@678 | 214 | * find_name relative to the original file.
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nkeynes@678 | 215 | * @return a newly allocated string.
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nkeynes@678 | 216 | */
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nkeynes@678 | 217 | gchar *gdrom_get_relative_filename( const gchar *base_name, const gchar *find_name );
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nkeynes@678 | 218 |
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nkeynes@709 | 219 | gdrom_device_t gdrom_device_new( const gchar *name, const gchar *dev_name );
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nkeynes@709 | 220 |
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nkeynes@709 | 221 | void gdrom_device_destroy( gdrom_device_t dev );
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nkeynes@709 | 222 |
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nkeynes@720 | 223 | /************* Host-native support functions ***************/
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nkeynes@720 | 224 |
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nkeynes@720 | 225 | /**
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nkeynes@782 | 226 | * Given a raw (2352 byte) data sector, extract the requested components into the
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nkeynes@782 | 227 | * target buffer. length will also be updated with the length of the copied
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nkeynes@782 | 228 | * data
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nkeynes@782 | 229 | */
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nkeynes@782 | 230 | void gdrom_extract_raw_data_sector( char *sector_data, int mode, unsigned char *buf, uint32_t *length );
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nkeynes@782 | 231 |
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nkeynes@782 | 232 | /**
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nkeynes@720 | 233 | * Parse a format 2 TOC, and write the results into the supplied disc structure.
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nkeynes@720 | 234 | */
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nkeynes@720 | 235 | void mmc_parse_toc2( gdrom_image_t disc, unsigned char *buf );
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nkeynes@720 | 236 |
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nkeynes@720 | 237 | /**
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nkeynes@720 | 238 | * Construct a Read CD command for the given sector + mode
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nkeynes@720 | 239 | */
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nkeynes@720 | 240 | void mmc_make_read_cd_cmd( char *cmd, uint32_t sector, int mode );
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nkeynes@736 | 241 |
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nkeynes@736 | 242 | #endif /* !lxdream_gddriver_H */
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