nkeynes@31 | 1 | /**
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nkeynes@347 | 2 | * $Id: cdi.c,v 1.6 2007-02-04 11:30:41 nkeynes Exp $
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nkeynes@31 | 3 | *
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nkeynes@31 | 4 | * CDI CD-image file support
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nkeynes@31 | 5 | *
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nkeynes@31 | 6 | * Copyright (c) 2005 Nathan Keynes.
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nkeynes@31 | 7 | *
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nkeynes@31 | 8 | * This program is free software; you can redistribute it and/or modify
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nkeynes@31 | 9 | * it under the terms of the GNU General Public License as published by
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nkeynes@31 | 10 | * the Free Software Foundation; either version 2 of the License, or
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nkeynes@31 | 11 | * (at your option) any later version.
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nkeynes@31 | 12 | *
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nkeynes@31 | 13 | * This program is distributed in the hope that it will be useful,
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nkeynes@31 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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nkeynes@31 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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nkeynes@31 | 16 | * GNU General Public License for more details.
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nkeynes@31 | 17 | */
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nkeynes@1 | 18 |
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nkeynes@1 | 19 | #include <stdlib.h>
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nkeynes@1 | 20 | #include <stdio.h>
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nkeynes@1 | 21 | #include <stdint.h>
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nkeynes@1 | 22 | #include <fcntl.h>
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nkeynes@1 | 23 | #include <errno.h>
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nkeynes@1 | 24 | #include <sys/stat.h>
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nkeynes@168 | 25 | #include "gdrom/gdrom.h"
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nkeynes@1 | 26 |
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nkeynes@168 | 27 | #define CDI_V2_ID 0x80000004
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nkeynes@168 | 28 | #define CDI_V3_ID 0x80000005
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nkeynes@168 | 29 | #define CDI_V35_ID 0x80000006
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nkeynes@168 | 30 |
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nkeynes@168 | 31 |
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nkeynes@168 | 32 | static gboolean cdi_image_is_valid( FILE *f );
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nkeynes@168 | 33 | static gdrom_disc_t cdi_image_open( const gchar *filename, FILE *f );
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nkeynes@168 | 34 |
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nkeynes@168 | 35 | struct gdrom_image_class cdi_image_class = { "DiscJuggler", "cdi",
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nkeynes@168 | 36 | cdi_image_is_valid, cdi_image_open };
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nkeynes@1 | 37 |
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nkeynes@347 | 38 | static const char TRACK_START_MARKER[20] = { 0,0,1,0,0,0,255,255,255,255,
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nkeynes@1 | 39 | 0,0,1,0,0,0,255,255,255,255 };
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nkeynes@347 | 40 | static const char EXT_MARKER[9] = {0,255,255,255,255,255,255,255,255 };
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nkeynes@1 | 41 |
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nkeynes@1 | 42 | struct cdi_trailer {
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nkeynes@1 | 43 | uint32_t cdi_version;
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nkeynes@1 | 44 | uint32_t header_offset;
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nkeynes@1 | 45 | };
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nkeynes@1 | 46 |
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nkeynes@1 | 47 | struct cdi_track_data {
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nkeynes@1 | 48 | char unknown[0x19];
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nkeynes@1 | 49 | uint32_t pregap_length;
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nkeynes@1 | 50 | uint32_t length;
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nkeynes@1 | 51 | char unknown2[6];
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nkeynes@1 | 52 | uint32_t mode;
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nkeynes@1 | 53 | char unknown3[0x0c];
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nkeynes@1 | 54 | uint32_t start_lba;
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nkeynes@1 | 55 | uint32_t total_length;
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nkeynes@1 | 56 | char unknown4[0x10];
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nkeynes@1 | 57 | uint32_t sector_size;
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nkeynes@1 | 58 | char unknown5[0x1D];
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nkeynes@1 | 59 | } __attribute__((packed));
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nkeynes@1 | 60 |
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nkeynes@168 | 61 | gboolean cdi_image_is_valid( FILE *f )
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nkeynes@1 | 62 | {
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nkeynes@168 | 63 | int len;
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nkeynes@168 | 64 | struct cdi_trailer trail;
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nkeynes@1 | 65 |
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nkeynes@168 | 66 | fseek( f, -8, SEEK_END );
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nkeynes@168 | 67 | len = ftell(f)+8;
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nkeynes@168 | 68 | fread( &trail, sizeof(trail), 1, f );
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nkeynes@168 | 69 | if( trail.header_offset >= len ||
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nkeynes@168 | 70 | trail.header_offset == 0 )
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nkeynes@168 | 71 | return FALSE;
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nkeynes@168 | 72 | return trail.cdi_version == CDI_V2_ID || trail.cdi_version == CDI_V3_ID;
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nkeynes@168 | 73 | }
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nkeynes@168 | 74 |
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nkeynes@168 | 75 | gdrom_disc_t cdi_image_open( const gchar *filename, FILE *f )
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nkeynes@168 | 76 | {
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nkeynes@168 | 77 | gdrom_disc_t disc = NULL;
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nkeynes@342 | 78 | gdrom_image_t image;
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nkeynes@1 | 79 | int fd = -1, i,j, tmp;
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nkeynes@168 | 80 | uint16_t session_count;
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nkeynes@168 | 81 | uint16_t track_count;
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nkeynes@168 | 82 | int total_tracks = 0;
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nkeynes@1 | 83 | int posn = 0, hdr;
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nkeynes@1 | 84 | long len;
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nkeynes@1 | 85 | struct cdi_trailer trail;
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nkeynes@1 | 86 | uint32_t new_fmt;
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nkeynes@1 | 87 | char tmpc;
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nkeynes@1 | 88 | char marker[20];
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nkeynes@1 | 89 |
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nkeynes@168 | 90 | fseek( f, -8, SEEK_END );
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nkeynes@168 | 91 | len = ftell(f)+8;
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nkeynes@168 | 92 | fread( &trail, sizeof(trail), 1, f );
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nkeynes@168 | 93 | if( trail.header_offset >= len ||
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nkeynes@1 | 94 | trail.header_offset == 0 )
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nkeynes@168 | 95 | return NULL;
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nkeynes@1 | 96 |
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nkeynes@168 | 97 | if( trail.cdi_version == CDI_V2_ID ) trail.cdi_version = 2;
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nkeynes@168 | 98 | else if( trail.cdi_version == CDI_V3_ID ) trail.cdi_version = 3;
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nkeynes@168 | 99 | else return NULL;
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nkeynes@1 | 100 |
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nkeynes@168 | 101 | fseek( f, trail.header_offset, SEEK_SET );
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nkeynes@168 | 102 | fread( &session_count, sizeof(session_count), 1, f );
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nkeynes@1 | 103 |
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nkeynes@168 | 104 | disc = gdrom_image_new(f);
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nkeynes@342 | 105 | if( disc == NULL ) {
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nkeynes@342 | 106 | fclose(f);
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nkeynes@342 | 107 | ERROR("Unable to allocate memory!");
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nkeynes@342 | 108 | return NULL;
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nkeynes@342 | 109 | }
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nkeynes@342 | 110 | image = (gdrom_image_t)disc;
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nkeynes@1 | 111 |
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nkeynes@168 | 112 | for( i=0; i< session_count; i++ ) {
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nkeynes@168 | 113 | fread( &track_count, sizeof(track_count), 1, f );
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nkeynes@347 | 114 | if( track_count + total_tracks > 99 ) {
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nkeynes@347 | 115 | ERROR( "Invalid number of tracks, bad cdi image\n" );
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nkeynes@347 | 116 | disc->close(disc);
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nkeynes@347 | 117 | return NULL;
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nkeynes@347 | 118 | }
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nkeynes@168 | 119 | for( j=0; j<track_count; j++ ) {
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nkeynes@1 | 120 | struct cdi_track_data trk;
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nkeynes@168 | 121 | uint32_t new_fmt = 0;
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nkeynes@168 | 122 | uint8_t fnamelen = 0;
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nkeynes@168 | 123 | fread( &new_fmt, sizeof(new_fmt), 1, f );
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nkeynes@1 | 124 | if( new_fmt != 0 ) { /* Additional data 3.00.780+ ?? */
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nkeynes@168 | 125 | fseek( f, 8, SEEK_CUR ); /* Skip */
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nkeynes@1 | 126 | }
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nkeynes@168 | 127 | fread( marker, 20, 1, f );
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nkeynes@347 | 128 | if( memcmp( marker, TRACK_START_MARKER, 20) != 0 ) {
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nkeynes@168 | 129 | ERROR( "Track start marker not found, error reading cdi image\n" );
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nkeynes@342 | 130 | disc->close(disc);
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nkeynes@168 | 131 | return NULL;
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nkeynes@168 | 132 | }
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nkeynes@168 | 133 | fseek( f, 4, SEEK_CUR );
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nkeynes@168 | 134 | fread( &fnamelen, 1, 1, f );
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nkeynes@168 | 135 | fseek( f, (int)fnamelen, SEEK_CUR ); /* skip over the filename */
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nkeynes@168 | 136 | fread( &trk, sizeof(trk), 1, f );
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nkeynes@342 | 137 | image->track[total_tracks].session = i;
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nkeynes@342 | 138 | image->track[total_tracks].lba = trk.start_lba + 150;
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nkeynes@342 | 139 | image->track[total_tracks].sector_count = trk.length;
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nkeynes@168 | 140 | switch( trk.mode ) {
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nkeynes@168 | 141 | case 0:
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nkeynes@342 | 142 | image->track[total_tracks].mode = GDROM_CDDA;
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nkeynes@342 | 143 | image->track[total_tracks].sector_size = 2352;
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nkeynes@342 | 144 | image->track[total_tracks].flags = 0x01;
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nkeynes@168 | 145 | if( trk.sector_size != 2 ) {
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nkeynes@168 | 146 | ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
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nkeynes@342 | 147 | disc->close(disc);
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nkeynes@168 | 148 | return NULL;
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nkeynes@168 | 149 | }
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nkeynes@168 | 150 | break;
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nkeynes@168 | 151 | case 1:
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nkeynes@342 | 152 | image->track[total_tracks].mode = GDROM_MODE1;
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nkeynes@342 | 153 | image->track[total_tracks].sector_size = 2048;
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nkeynes@342 | 154 | image->track[total_tracks].flags = 0x41;
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nkeynes@168 | 155 | if( trk.sector_size != 0 ) {
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nkeynes@168 | 156 | ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
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nkeynes@342 | 157 | disc->close(disc);
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nkeynes@168 | 158 | return NULL;
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nkeynes@168 | 159 | }
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nkeynes@168 | 160 | break;
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nkeynes@168 | 161 | case 2:
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nkeynes@342 | 162 | image->track[total_tracks].flags = 0x41;
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nkeynes@168 | 163 | switch( trk.sector_size ) {
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nkeynes@168 | 164 | case 0:
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nkeynes@342 | 165 | image->track[total_tracks].mode = GDROM_MODE2_XA1;
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nkeynes@342 | 166 | image->track[total_tracks].sector_size = 2048;
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nkeynes@168 | 167 | break;
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nkeynes@168 | 168 | case 1:
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nkeynes@342 | 169 | image->track[total_tracks].mode = GDROM_MODE2;
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nkeynes@342 | 170 | image->track[total_tracks].sector_size = 2336;
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nkeynes@168 | 171 | break;
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nkeynes@168 | 172 | case 2:
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nkeynes@168 | 173 | default:
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nkeynes@168 | 174 | ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
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nkeynes@342 | 175 | disc->close(disc);
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nkeynes@168 | 176 | return NULL;
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nkeynes@168 | 177 | }
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nkeynes@168 | 178 | break;
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nkeynes@168 | 179 | default:
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nkeynes@168 | 180 | ERROR( "Unsupported track mode %d", trk.mode );
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nkeynes@342 | 181 | disc->close(disc);
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nkeynes@168 | 182 | return NULL;
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nkeynes@168 | 183 | }
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nkeynes@342 | 184 | image->track[total_tracks].offset = posn +
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nkeynes@342 | 185 | trk.pregap_length * image->track[total_tracks].sector_size ;
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nkeynes@342 | 186 | posn += trk.total_length * image->track[total_tracks].sector_size;
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nkeynes@168 | 187 | total_tracks++;
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nkeynes@347 | 188 | fread( marker, 1, 9, f );
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nkeynes@347 | 189 | if( memcmp( marker, EXT_MARKER, 9 ) == 0 ) {
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nkeynes@347 | 190 | fseek( f, 91, SEEK_CUR );
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nkeynes@168 | 191 | } else {
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nkeynes@347 | 192 | fseek( f, 3, SEEK_CUR );
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nkeynes@168 | 193 | }
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nkeynes@168 | 194 | }
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nkeynes@1 | 195 | }
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nkeynes@342 | 196 | image->track_count = total_tracks;
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nkeynes@342 | 197 | image->filename = filename;
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nkeynes@168 | 198 | return disc;
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nkeynes@1 | 199 | }
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