lxdream 0.9.1| filename | src/gdrom/gdrom.h |
| changeset | 149:d88dd2e9a190 |
| prev | 143:9446fb6df0c5 |
| next | 152:d42a4c5cc709 |
| author | nkeynes |
| date | Tue May 23 13:10:28 2006 +0000 (17 years ago) |
| permissions | -rw-r--r-- |
| last change | Add texcache invalidates on direct writes to 64-bit vram. Technically we should do it on direct writes to 32-bit vram as well, but noone (sane) is going to try to write a texture there... |
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1 /**
2 * $Id: gdrom.h,v 1.5 2006-05-20 06:24:49 nkeynes Exp $
3 *
4 * This file defines the structures and functions used by the GD-Rom
5 * disc driver. (ie, the modules that supply a CD image to be used by the
6 * system).
7 *
8 * Copyright (c) 2005 Nathan Keynes.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 */
21 #ifndef dream_gdrom_H
22 #define dream_gdrom_H 1
24 #include "dream.h"
26 typedef uint16_t gdrom_error_t;
28 struct gdrom_toc {
29 uint32_t track[99];
30 uint32_t first, last, leadout;
31 };
33 #define GDROM_PREGAP 150 /* Sectors */
35 extern uint32_t gdrom_sector_size[];
36 #define GDROM_SECTOR_SIZE(x) gdrom_sector_size[x]
37 typedef enum {
38 GDROM_MODE1,
39 GDROM_MODE2,
40 GDROM_MODE2_XA1,
41 GDROM_MODE2_XA2,
42 GDROM_CDDA,
43 GDROM_GD,
44 GDROM_RAW
45 } gdrom_track_mode_t;
47 /* The disc register indicates the current contents of the drive. When open
48 * contains 0x06.
49 */
50 #define IDE_DISC_AUDIO 0x00
51 #define IDE_DISC_NONE 0x06
52 #define IDE_DISC_CDROM 0x20
53 #define IDE_DISC_GDROM 0x80
54 #define IDE_DISC_READY 0x01 /* ored with above */
55 #define IDE_DISC_IDLE 0x02 /* ie spun-down */
57 #define TRACK_PRE_EMPHASIS 0x10
58 #define TRACK_COPY_PERMITTED 0x20
59 #define TRACK_DATA 0x40
60 #define TRACK_FOUR_CHANNEL 0x80
62 struct gdrom_track {
63 gdrom_track_mode_t mode;
64 uint8_t flags; /* Track flags */
65 int session; /* session # containing this track */
66 uint32_t lba; /* start sector address */
67 uint32_t sector_size; /* For convenience, determined by mode */
68 uint32_t sector_count;
69 uint32_t offset; /* File offset of start of track - image files only */
70 };
73 typedef struct gdrom_disc {
74 int disc_type;
75 int track_count;
76 struct gdrom_track track[99];
77 gchar mcn[14]; /* Media catalogue number */
78 const gchar *filename; /* Image filename */
79 FILE *file; /* Stream, for image files */
80 uint32_t (*read_sectors)( struct gdrom_disc *disc,
81 uint32_t lba, uint32_t sector_count,
82 int mode, char *buf, uint32_t *length );
83 void (*close)( struct gdrom_disc *disc );
84 } *gdrom_disc_t;
86 /**
87 * Construct a new image file using the default methods.
88 */
89 gdrom_disc_t gdrom_image_new( FILE *file );
91 /**
92 * Open an image file
93 */
94 gdrom_disc_t gdrom_image_open( const gchar *filename );
95 gdrom_disc_t nrg_image_open( const gchar *filename );
97 /**
98 * Retrieve the disc table of contents, and write it into the buffer in the
99 * format expected by the DC.
100 * @return 0 on success, error code on failure (eg no disc mounted)
101 */
102 gdrom_error_t gdrom_get_toc( char *buf );
104 /**
105 * Retrieve the short (6-byte) disc info, and write it into the buffer.
106 * @return 0 on success, error code on failure.
107 */
108 gdrom_error_t gdrom_get_info( char *buf );
110 /**
111 * Shortcut to open and mount an image file
112 */
113 gdrom_disc_t gdrom_mount_image( const gchar *filename );
115 void gdrom_mount_disc( gdrom_disc_t disc );
117 void gdrom_unmount_disc( void );
119 gboolean gdrom_is_mounted( void );
121 uint32_t gdrom_read_sectors( uint32_t sector, uint32_t sector_count,
122 int mode, char *buf, uint32_t *length );
124 #endif
.