filename | src/drivers/cdrom/cd_cdi.c |
changeset | 1109:700c5ab26a63 |
prev | 1097:d4807997e450 |
next | 1180:f2b9f4ef1987 |
author | nkeynes |
date | Thu Jun 10 22:13:16 2010 +1000 (13 years ago) |
permissions | -rw-r--r-- |
last change | Integrate executable wrapping into the user interface - command-line now loads wrapped by default, -e <bin> to run binary - add support for .bin executables - Add useful (internal) error codes |
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nkeynes@31 | 1 | /** |
nkeynes@561 | 2 | * $Id$ |
nkeynes@31 | 3 | * |
nkeynes@31 | 4 | * CDI CD-image file support |
nkeynes@31 | 5 | * |
nkeynes@31 | 6 | * Copyright (c) 2005 Nathan Keynes. |
nkeynes@31 | 7 | * |
nkeynes@31 | 8 | * This program is free software; you can redistribute it and/or modify |
nkeynes@31 | 9 | * it under the terms of the GNU General Public License as published by |
nkeynes@31 | 10 | * the Free Software Foundation; either version 2 of the License, or |
nkeynes@31 | 11 | * (at your option) any later version. |
nkeynes@31 | 12 | * |
nkeynes@31 | 13 | * This program is distributed in the hope that it will be useful, |
nkeynes@31 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
nkeynes@31 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
nkeynes@31 | 16 | * GNU General Public License for more details. |
nkeynes@31 | 17 | */ |
nkeynes@1 | 18 | |
nkeynes@1 | 19 | #include <stdlib.h> |
nkeynes@1 | 20 | #include <stdio.h> |
nkeynes@1 | 21 | #include <stdint.h> |
nkeynes@759 | 22 | #include <string.h> |
nkeynes@1 | 23 | #include <fcntl.h> |
nkeynes@1 | 24 | #include <errno.h> |
nkeynes@1 | 25 | #include <sys/stat.h> |
nkeynes@1097 | 26 | #include "drivers/cdrom/cdimpl.h" |
nkeynes@1 | 27 | |
nkeynes@168 | 28 | #define CDI_V2_ID 0x80000004 |
nkeynes@168 | 29 | #define CDI_V3_ID 0x80000005 |
nkeynes@168 | 30 | #define CDI_V35_ID 0x80000006 |
nkeynes@168 | 31 | |
nkeynes@168 | 32 | |
nkeynes@168 | 33 | static gboolean cdi_image_is_valid( FILE *f ); |
nkeynes@1097 | 34 | static gboolean cdi_image_read_toc( cdrom_disc_t disc, ERROR *err ); |
nkeynes@168 | 35 | |
nkeynes@1097 | 36 | struct cdrom_disc_factory cdi_disc_factory = { "DiscJuggler", "cdi", |
nkeynes@1097 | 37 | cdi_image_is_valid, NULL, cdi_image_read_toc }; |
nkeynes@1 | 38 | |
nkeynes@347 | 39 | static const char TRACK_START_MARKER[20] = { 0,0,1,0,0,0,255,255,255,255, |
nkeynes@736 | 40 | 0,0,1,0,0,0,255,255,255,255 }; |
nkeynes@347 | 41 | static const char EXT_MARKER[9] = {0,255,255,255,255,255,255,255,255 }; |
nkeynes@1 | 42 | |
nkeynes@1 | 43 | struct cdi_trailer { |
nkeynes@1 | 44 | uint32_t cdi_version; |
nkeynes@1 | 45 | uint32_t header_offset; |
nkeynes@1 | 46 | }; |
nkeynes@1 | 47 | |
nkeynes@1 | 48 | struct cdi_track_data { |
nkeynes@1 | 49 | uint32_t pregap_length; |
nkeynes@1 | 50 | uint32_t length; |
nkeynes@1 | 51 | char unknown2[6]; |
nkeynes@1 | 52 | uint32_t mode; |
nkeynes@1 | 53 | char unknown3[0x0c]; |
nkeynes@1 | 54 | uint32_t start_lba; |
nkeynes@1 | 55 | uint32_t total_length; |
nkeynes@1 | 56 | char unknown4[0x10]; |
nkeynes@1 | 57 | uint32_t sector_size; |
nkeynes@1 | 58 | char unknown5[0x1D]; |
nkeynes@1 | 59 | } __attribute__((packed)); |
nkeynes@1 | 60 | |
nkeynes@168 | 61 | gboolean cdi_image_is_valid( FILE *f ) |
nkeynes@1 | 62 | { |
nkeynes@168 | 63 | int len; |
nkeynes@168 | 64 | struct cdi_trailer trail; |
nkeynes@1 | 65 | |
nkeynes@168 | 66 | fseek( f, -8, SEEK_END ); |
nkeynes@168 | 67 | len = ftell(f)+8; |
nkeynes@168 | 68 | fread( &trail, sizeof(trail), 1, f ); |
nkeynes@168 | 69 | if( trail.header_offset >= len || |
nkeynes@736 | 70 | trail.header_offset == 0 ) |
nkeynes@736 | 71 | return FALSE; |
nkeynes@453 | 72 | return trail.cdi_version == CDI_V2_ID || trail.cdi_version == CDI_V3_ID || |
nkeynes@736 | 73 | trail.cdi_version == CDI_V35_ID; |
nkeynes@168 | 74 | } |
nkeynes@168 | 75 | |
nkeynes@1109 | 76 | #define RETURN_PARSE_ERROR( ... ) do { SET_ERROR(err, LX_ERR_FILE_INVALID, __VA_ARGS__); return FALSE; } while(0) |
nkeynes@1097 | 77 | |
nkeynes@1097 | 78 | static gboolean cdi_image_read_toc( cdrom_disc_t disc, ERROR *err ) |
nkeynes@168 | 79 | { |
nkeynes@422 | 80 | int i,j; |
nkeynes@168 | 81 | uint16_t session_count; |
nkeynes@168 | 82 | uint16_t track_count; |
nkeynes@168 | 83 | int total_tracks = 0; |
nkeynes@422 | 84 | int posn = 0; |
nkeynes@1 | 85 | long len; |
nkeynes@1 | 86 | struct cdi_trailer trail; |
nkeynes@1 | 87 | char marker[20]; |
nkeynes@1 | 88 | |
nkeynes@1097 | 89 | FILE *f = cdrom_disc_get_base_file(disc); |
nkeynes@168 | 90 | fseek( f, -8, SEEK_END ); |
nkeynes@168 | 91 | len = ftell(f)+8; |
nkeynes@168 | 92 | fread( &trail, sizeof(trail), 1, f ); |
nkeynes@168 | 93 | if( trail.header_offset >= len || |
nkeynes@1097 | 94 | trail.header_offset == 0 ) { |
nkeynes@1097 | 95 | RETURN_PARSE_ERROR( "Invalid CDI image" ); |
nkeynes@1097 | 96 | } |
nkeynes@736 | 97 | |
nkeynes@453 | 98 | if( trail.cdi_version != CDI_V2_ID && trail.cdi_version != CDI_V3_ID && |
nkeynes@736 | 99 | trail.cdi_version != CDI_V35_ID ) { |
nkeynes@1097 | 100 | RETURN_PARSE_ERROR( "Invalid CDI image" ); |
nkeynes@453 | 101 | } |
nkeynes@1 | 102 | |
nkeynes@453 | 103 | if( trail.cdi_version == CDI_V35_ID ) { |
nkeynes@999 | 104 | fseek( f, -(long)trail.header_offset, SEEK_END ); |
nkeynes@453 | 105 | } else { |
nkeynes@736 | 106 | fseek( f, trail.header_offset, SEEK_SET ); |
nkeynes@453 | 107 | } |
nkeynes@168 | 108 | fread( &session_count, sizeof(session_count), 1, f ); |
nkeynes@736 | 109 | |
nkeynes@168 | 110 | for( i=0; i< session_count; i++ ) { |
nkeynes@736 | 111 | fread( &track_count, sizeof(track_count), 1, f ); |
nkeynes@736 | 112 | if( track_count + total_tracks > 99 ) { |
nkeynes@1097 | 113 | RETURN_PARSE_ERROR("Invalid number of tracks, bad cdi image" ); |
nkeynes@736 | 114 | } |
nkeynes@168 | 115 | for( j=0; j<track_count; j++ ) { |
nkeynes@1 | 116 | struct cdi_track_data trk; |
nkeynes@168 | 117 | uint32_t new_fmt = 0; |
nkeynes@736 | 118 | uint8_t fnamelen = 0; |
nkeynes@168 | 119 | fread( &new_fmt, sizeof(new_fmt), 1, f ); |
nkeynes@1 | 120 | if( new_fmt != 0 ) { /* Additional data 3.00.780+ ?? */ |
nkeynes@736 | 121 | fseek( f, 8, SEEK_CUR ); /* Skip */ |
nkeynes@1 | 122 | } |
nkeynes@168 | 123 | fread( marker, 20, 1, f ); |
nkeynes@347 | 124 | if( memcmp( marker, TRACK_START_MARKER, 20) != 0 ) { |
nkeynes@1097 | 125 | RETURN_PARSE_ERROR( "Track start marker not found, error reading cdi image" ); |
nkeynes@736 | 126 | } |
nkeynes@736 | 127 | fseek( f, 4, SEEK_CUR ); |
nkeynes@168 | 128 | fread( &fnamelen, 1, 1, f ); |
nkeynes@168 | 129 | fseek( f, (int)fnamelen, SEEK_CUR ); /* skip over the filename */ |
nkeynes@736 | 130 | fseek( f, 19, SEEK_CUR ); |
nkeynes@736 | 131 | fread( &new_fmt, sizeof(new_fmt), 1, f ); |
nkeynes@736 | 132 | if( new_fmt == 0x80000000 ) { |
nkeynes@736 | 133 | fseek( f, 10, SEEK_CUR ); |
nkeynes@736 | 134 | } else { |
nkeynes@736 | 135 | fseek( f, 2, SEEK_CUR ); |
nkeynes@736 | 136 | } |
nkeynes@168 | 137 | fread( &trk, sizeof(trk), 1, f ); |
nkeynes@1097 | 138 | disc->track[total_tracks].sessionno = i+1; |
nkeynes@1097 | 139 | disc->track[total_tracks].lba = trk.start_lba; |
nkeynes@1097 | 140 | cdrom_count_t sector_count = trk.length; |
nkeynes@1097 | 141 | sector_mode_t mode; |
nkeynes@736 | 142 | switch( trk.mode ) { |
nkeynes@736 | 143 | case 0: |
nkeynes@1097 | 144 | mode = SECTOR_CDDA; |
nkeynes@1023 | 145 | disc->track[total_tracks].flags = 0x01; |
nkeynes@736 | 146 | if( trk.sector_size != 2 ) { |
nkeynes@1097 | 147 | RETURN_PARSE_ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size ); |
nkeynes@736 | 148 | } |
nkeynes@736 | 149 | break; |
nkeynes@736 | 150 | case 1: |
nkeynes@1097 | 151 | mode = SECTOR_MODE1; |
nkeynes@1023 | 152 | disc->track[total_tracks].flags = 0x41; |
nkeynes@736 | 153 | if( trk.sector_size != 0 ) { |
nkeynes@1097 | 154 | RETURN_PARSE_ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size ); |
nkeynes@736 | 155 | } |
nkeynes@736 | 156 | break; |
nkeynes@736 | 157 | case 2: |
nkeynes@1023 | 158 | disc->track[total_tracks].flags = 0x41; |
nkeynes@736 | 159 | switch( trk.sector_size ) { |
nkeynes@736 | 160 | case 0: |
nkeynes@1097 | 161 | mode = SECTOR_MODE2_FORM1; |
nkeynes@736 | 162 | break; |
nkeynes@736 | 163 | case 1: |
nkeynes@1097 | 164 | mode = SECTOR_SEMIRAW_MODE2; |
nkeynes@736 | 165 | break; |
nkeynes@736 | 166 | case 2: |
nkeynes@736 | 167 | default: |
nkeynes@1097 | 168 | RETURN_PARSE_ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size ); |
nkeynes@736 | 169 | } |
nkeynes@736 | 170 | break; |
nkeynes@1097 | 171 | default: |
nkeynes@1097 | 172 | RETURN_PARSE_ERROR( "Unsupported track mode %d", trk.mode ); |
nkeynes@736 | 173 | } |
nkeynes@1097 | 174 | uint32_t offset = posn + |
nkeynes@1097 | 175 | trk.pregap_length * CDROM_SECTOR_SIZE(mode); |
nkeynes@1097 | 176 | disc->track[total_tracks].source = file_sector_source_new_source( disc->base_source, mode, offset, sector_count ); |
nkeynes@1097 | 177 | posn += trk.total_length * CDROM_SECTOR_SIZE(mode); |
nkeynes@736 | 178 | total_tracks++; |
nkeynes@736 | 179 | fread( marker, 1, 9, f ); |
nkeynes@736 | 180 | if( memcmp( marker, EXT_MARKER, 9 ) == 0 ) { |
nkeynes@736 | 181 | fseek( f, 79, SEEK_CUR ); |
nkeynes@736 | 182 | } else { |
nkeynes@736 | 183 | fseek( f, -9, SEEK_CUR ); |
nkeynes@736 | 184 | } |
nkeynes@736 | 185 | } |
nkeynes@736 | 186 | fseek( f, 12, SEEK_CUR ); |
nkeynes@1 | 187 | } |
nkeynes@1097 | 188 | |
nkeynes@1023 | 189 | disc->track_count = total_tracks; |
nkeynes@1097 | 190 | disc->session_count = session_count; |
nkeynes@1097 | 191 | return TRUE; |
nkeynes@1 | 192 | } |
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