filename | src/gdrom/cdi.c |
changeset | 759:f16975739abc |
prev | 736:a02d1475ccfd |
next | 999:3d19e3597d9b |
author | nkeynes |
date | Tue Jul 29 06:35:28 2008 +0000 (15 years ago) |
permissions | -rw-r--r-- |
last change | Workaround OS X's inability to handle CD reads of unknown size (ie where the read request failed to specify an expected sector type) - read raw sectors and parse it out by hand. |
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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@678 | 26 | #include "gdrom/gddriver.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@168 | 34 | static gdrom_disc_t cdi_image_open( const gchar *filename, FILE *f ); |
nkeynes@168 | 35 | |
nkeynes@168 | 36 | struct gdrom_image_class cdi_image_class = { "DiscJuggler", "cdi", |
nkeynes@736 | 37 | cdi_image_is_valid, cdi_image_open }; |
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@168 | 76 | gdrom_disc_t cdi_image_open( const gchar *filename, FILE *f ) |
nkeynes@168 | 77 | { |
nkeynes@168 | 78 | gdrom_disc_t disc = NULL; |
nkeynes@342 | 79 | gdrom_image_t image; |
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@168 | 89 | fseek( f, -8, SEEK_END ); |
nkeynes@168 | 90 | len = ftell(f)+8; |
nkeynes@168 | 91 | fread( &trail, sizeof(trail), 1, f ); |
nkeynes@168 | 92 | if( trail.header_offset >= len || |
nkeynes@736 | 93 | trail.header_offset == 0 ) |
nkeynes@736 | 94 | return NULL; |
nkeynes@736 | 95 | |
nkeynes@453 | 96 | if( trail.cdi_version != CDI_V2_ID && trail.cdi_version != CDI_V3_ID && |
nkeynes@736 | 97 | trail.cdi_version != CDI_V35_ID ) { |
nkeynes@736 | 98 | return NULL; |
nkeynes@453 | 99 | } |
nkeynes@1 | 100 | |
nkeynes@453 | 101 | if( trail.cdi_version == CDI_V35_ID ) { |
nkeynes@736 | 102 | fseek( f, -trail.header_offset, SEEK_END ); |
nkeynes@453 | 103 | } else { |
nkeynes@736 | 104 | fseek( f, trail.header_offset, SEEK_SET ); |
nkeynes@453 | 105 | } |
nkeynes@168 | 106 | fread( &session_count, sizeof(session_count), 1, f ); |
nkeynes@736 | 107 | |
nkeynes@464 | 108 | disc = gdrom_image_new(filename, f); |
nkeynes@342 | 109 | if( disc == NULL ) { |
nkeynes@736 | 110 | ERROR("Unable to allocate memory!"); |
nkeynes@736 | 111 | return NULL; |
nkeynes@342 | 112 | } |
nkeynes@342 | 113 | image = (gdrom_image_t)disc; |
nkeynes@1 | 114 | |
nkeynes@168 | 115 | for( i=0; i< session_count; i++ ) { |
nkeynes@736 | 116 | fread( &track_count, sizeof(track_count), 1, f ); |
nkeynes@736 | 117 | if( track_count + total_tracks > 99 ) { |
nkeynes@736 | 118 | ERROR( "Invalid number of tracks, bad cdi image\n" ); |
nkeynes@736 | 119 | gdrom_image_destroy_no_close(disc); |
nkeynes@736 | 120 | return NULL; |
nkeynes@736 | 121 | } |
nkeynes@168 | 122 | for( j=0; j<track_count; j++ ) { |
nkeynes@1 | 123 | struct cdi_track_data trk; |
nkeynes@168 | 124 | uint32_t new_fmt = 0; |
nkeynes@736 | 125 | uint8_t fnamelen = 0; |
nkeynes@168 | 126 | fread( &new_fmt, sizeof(new_fmt), 1, f ); |
nkeynes@1 | 127 | if( new_fmt != 0 ) { /* Additional data 3.00.780+ ?? */ |
nkeynes@736 | 128 | fseek( f, 8, SEEK_CUR ); /* Skip */ |
nkeynes@1 | 129 | } |
nkeynes@168 | 130 | fread( marker, 20, 1, f ); |
nkeynes@347 | 131 | if( memcmp( marker, TRACK_START_MARKER, 20) != 0 ) { |
nkeynes@736 | 132 | ERROR( "Track start marker not found, error reading cdi image\n" ); |
nkeynes@736 | 133 | gdrom_image_destroy_no_close(disc); |
nkeynes@736 | 134 | return NULL; |
nkeynes@736 | 135 | } |
nkeynes@736 | 136 | fseek( f, 4, SEEK_CUR ); |
nkeynes@168 | 137 | fread( &fnamelen, 1, 1, f ); |
nkeynes@168 | 138 | fseek( f, (int)fnamelen, SEEK_CUR ); /* skip over the filename */ |
nkeynes@736 | 139 | fseek( f, 19, SEEK_CUR ); |
nkeynes@736 | 140 | fread( &new_fmt, sizeof(new_fmt), 1, f ); |
nkeynes@736 | 141 | if( new_fmt == 0x80000000 ) { |
nkeynes@736 | 142 | fseek( f, 10, SEEK_CUR ); |
nkeynes@736 | 143 | } else { |
nkeynes@736 | 144 | fseek( f, 2, SEEK_CUR ); |
nkeynes@736 | 145 | } |
nkeynes@168 | 146 | fread( &trk, sizeof(trk), 1, f ); |
nkeynes@736 | 147 | image->track[total_tracks].session = i; |
nkeynes@736 | 148 | image->track[total_tracks].lba = trk.start_lba + 150; |
nkeynes@736 | 149 | image->track[total_tracks].sector_count = trk.length; |
nkeynes@736 | 150 | switch( trk.mode ) { |
nkeynes@736 | 151 | case 0: |
nkeynes@736 | 152 | image->track[total_tracks].mode = GDROM_CDDA; |
nkeynes@736 | 153 | image->track[total_tracks].sector_size = 2352; |
nkeynes@736 | 154 | image->track[total_tracks].flags = 0x01; |
nkeynes@736 | 155 | if( trk.sector_size != 2 ) { |
nkeynes@736 | 156 | ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size ); |
nkeynes@736 | 157 | gdrom_image_destroy_no_close(disc); |
nkeynes@736 | 158 | return NULL; |
nkeynes@736 | 159 | } |
nkeynes@736 | 160 | break; |
nkeynes@736 | 161 | case 1: |
nkeynes@736 | 162 | image->track[total_tracks].mode = GDROM_MODE1; |
nkeynes@736 | 163 | image->track[total_tracks].sector_size = 2048; |
nkeynes@736 | 164 | image->track[total_tracks].flags = 0x41; |
nkeynes@736 | 165 | if( trk.sector_size != 0 ) { |
nkeynes@736 | 166 | ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size ); |
nkeynes@736 | 167 | gdrom_image_destroy_no_close(disc); |
nkeynes@736 | 168 | return NULL; |
nkeynes@736 | 169 | } |
nkeynes@736 | 170 | break; |
nkeynes@736 | 171 | case 2: |
nkeynes@736 | 172 | image->track[total_tracks].flags = 0x41; |
nkeynes@736 | 173 | switch( trk.sector_size ) { |
nkeynes@736 | 174 | case 0: |
nkeynes@736 | 175 | image->track[total_tracks].mode = GDROM_MODE2_FORM1; |
nkeynes@736 | 176 | image->track[total_tracks].sector_size = 2048; |
nkeynes@736 | 177 | break; |
nkeynes@736 | 178 | case 1: |
nkeynes@736 | 179 | image->track[total_tracks].mode = GDROM_SEMIRAW_MODE2; |
nkeynes@736 | 180 | image->track[total_tracks].sector_size = 2336; |
nkeynes@736 | 181 | break; |
nkeynes@736 | 182 | case 2: |
nkeynes@736 | 183 | default: |
nkeynes@736 | 184 | ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size ); |
nkeynes@736 | 185 | gdrom_image_destroy_no_close(disc); |
nkeynes@736 | 186 | return NULL; |
nkeynes@736 | 187 | } |
nkeynes@736 | 188 | break; |
nkeynes@736 | 189 | default: |
nkeynes@736 | 190 | ERROR( "Unsupported track mode %d", trk.mode ); |
nkeynes@736 | 191 | gdrom_image_destroy_no_close(disc); |
nkeynes@736 | 192 | return NULL; |
nkeynes@736 | 193 | } |
nkeynes@736 | 194 | image->track[total_tracks].offset = posn + |
nkeynes@736 | 195 | trk.pregap_length * image->track[total_tracks].sector_size ; |
nkeynes@736 | 196 | posn += trk.total_length * image->track[total_tracks].sector_size; |
nkeynes@736 | 197 | total_tracks++; |
nkeynes@736 | 198 | fread( marker, 1, 9, f ); |
nkeynes@736 | 199 | if( memcmp( marker, EXT_MARKER, 9 ) == 0 ) { |
nkeynes@736 | 200 | fseek( f, 79, SEEK_CUR ); |
nkeynes@736 | 201 | } else { |
nkeynes@736 | 202 | fseek( f, -9, SEEK_CUR ); |
nkeynes@736 | 203 | } |
nkeynes@736 | 204 | } |
nkeynes@736 | 205 | fseek( f, 12, SEEK_CUR ); |
nkeynes@1 | 206 | } |
nkeynes@342 | 207 | image->track_count = total_tracks; |
nkeynes@168 | 208 | return disc; |
nkeynes@1 | 209 | } |
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