nkeynes@31 | 1 | /**
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nkeynes@168 | 2 | * $Id: cdi.c,v 1.3 2006-06-26 10:30:42 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@1 | 38 | static 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@1 | 40 |
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nkeynes@1 | 41 | struct cdi_trailer {
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nkeynes@1 | 42 | uint32_t cdi_version;
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nkeynes@1 | 43 | uint32_t header_offset;
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nkeynes@1 | 44 | };
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nkeynes@1 | 45 |
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nkeynes@1 | 46 | struct cdi_track_data {
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nkeynes@1 | 47 | char unknown[0x19];
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nkeynes@1 | 48 | uint32_t pregap_length;
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nkeynes@1 | 49 | uint32_t length;
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nkeynes@1 | 50 | char unknown2[6];
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nkeynes@1 | 51 | uint32_t mode;
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nkeynes@1 | 52 | char unknown3[0x0c];
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nkeynes@1 | 53 | uint32_t start_lba;
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nkeynes@1 | 54 | uint32_t total_length;
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nkeynes@1 | 55 | char unknown4[0x10];
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nkeynes@1 | 56 | uint32_t sector_size;
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nkeynes@1 | 57 | char unknown5[0x1D];
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nkeynes@1 | 58 | } __attribute__((packed));
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nkeynes@1 | 59 |
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nkeynes@168 | 60 | gboolean cdi_image_is_valid( FILE *f )
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nkeynes@1 | 61 | {
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nkeynes@168 | 62 | int len;
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nkeynes@168 | 63 | struct cdi_trailer trail;
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nkeynes@1 | 64 |
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nkeynes@168 | 65 | fseek( f, -8, SEEK_END );
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nkeynes@168 | 66 | len = ftell(f)+8;
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nkeynes@168 | 67 | fread( &trail, sizeof(trail), 1, f );
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nkeynes@168 | 68 | if( trail.header_offset >= len ||
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nkeynes@168 | 69 | trail.header_offset == 0 )
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nkeynes@168 | 70 | return FALSE;
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nkeynes@168 | 71 | return trail.cdi_version == CDI_V2_ID || trail.cdi_version == CDI_V3_ID;
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nkeynes@168 | 72 | }
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nkeynes@168 | 73 |
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nkeynes@168 | 74 | gdrom_disc_t cdi_image_open( const gchar *filename, FILE *f )
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nkeynes@168 | 75 | {
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nkeynes@168 | 76 | gdrom_disc_t disc = NULL;
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nkeynes@1 | 77 | int fd = -1, i,j, tmp;
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nkeynes@168 | 78 | uint16_t session_count;
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nkeynes@168 | 79 | uint16_t track_count;
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nkeynes@168 | 80 | int total_tracks = 0;
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nkeynes@1 | 81 | int posn = 0, hdr;
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nkeynes@1 | 82 | long len;
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nkeynes@1 | 83 | struct cdi_trailer trail;
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nkeynes@1 | 84 | uint32_t new_fmt;
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nkeynes@1 | 85 | char tmpc;
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nkeynes@1 | 86 | char marker[20];
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nkeynes@1 | 87 |
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nkeynes@168 | 88 | fseek( f, -8, SEEK_END );
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nkeynes@168 | 89 | len = ftell(f)+8;
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nkeynes@168 | 90 | fread( &trail, sizeof(trail), 1, f );
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nkeynes@168 | 91 | if( trail.header_offset >= len ||
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nkeynes@1 | 92 | trail.header_offset == 0 )
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nkeynes@168 | 93 | return NULL;
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nkeynes@1 | 94 |
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nkeynes@168 | 95 | if( trail.cdi_version == CDI_V2_ID ) trail.cdi_version = 2;
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nkeynes@168 | 96 | else if( trail.cdi_version == CDI_V3_ID ) trail.cdi_version = 3;
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nkeynes@168 | 97 | else return NULL;
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nkeynes@1 | 98 |
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nkeynes@168 | 99 | fseek( f, trail.header_offset, SEEK_SET );
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nkeynes@168 | 100 | fread( &session_count, sizeof(session_count), 1, f );
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nkeynes@1 | 101 |
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nkeynes@168 | 102 | disc = gdrom_image_new(f);
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nkeynes@1 | 103 |
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nkeynes@168 | 104 | for( i=0; i< session_count; i++ ) {
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nkeynes@168 | 105 | fread( &track_count, sizeof(track_count), 1, f );
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nkeynes@168 | 106 | for( j=0; j<track_count; j++ ) {
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nkeynes@1 | 107 | struct cdi_track_data trk;
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nkeynes@168 | 108 | uint32_t new_fmt = 0;
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nkeynes@168 | 109 | uint8_t fnamelen = 0;
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nkeynes@168 | 110 | fread( &new_fmt, sizeof(new_fmt), 1, f );
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nkeynes@1 | 111 | if( new_fmt != 0 ) { /* Additional data 3.00.780+ ?? */
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nkeynes@168 | 112 | fseek( f, 8, SEEK_CUR ); /* Skip */
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nkeynes@1 | 113 | }
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nkeynes@168 | 114 | fread( marker, 20, 1, f );
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nkeynes@168 | 115 | if( memcmp( marker, track_start_marker, 20) != 0 ) {
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nkeynes@168 | 116 | ERROR( "Track start marker not found, error reading cdi image\n" );
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nkeynes@168 | 117 | free(disc);
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nkeynes@168 | 118 | return NULL;
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nkeynes@168 | 119 | }
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nkeynes@168 | 120 | fseek( f, 4, SEEK_CUR );
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nkeynes@168 | 121 | fread( &fnamelen, 1, 1, f );
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nkeynes@168 | 122 | fseek( f, (int)fnamelen, SEEK_CUR ); /* skip over the filename */
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nkeynes@168 | 123 | fread( &trk, sizeof(trk), 1, f );
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nkeynes@168 | 124 | disc->track[total_tracks].session = i;
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nkeynes@168 | 125 | disc->track[total_tracks].lba = trk.start_lba;
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nkeynes@168 | 126 | disc->track[total_tracks].sector_count = trk.length;
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nkeynes@168 | 127 | switch( trk.mode ) {
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nkeynes@168 | 128 | case 0:
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nkeynes@168 | 129 | disc->track[total_tracks].mode = GDROM_CDDA;
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nkeynes@168 | 130 | disc->track[total_tracks].sector_size = 2352;
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nkeynes@168 | 131 | disc->track[total_tracks].flags = 0x01;
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nkeynes@168 | 132 | if( trk.sector_size != 2 ) {
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nkeynes@168 | 133 | ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
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nkeynes@168 | 134 | free(disc);
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nkeynes@168 | 135 | return NULL;
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nkeynes@168 | 136 | }
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nkeynes@168 | 137 | break;
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nkeynes@168 | 138 | case 1:
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nkeynes@168 | 139 | disc->track[total_tracks].mode = GDROM_MODE1;
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nkeynes@168 | 140 | disc->track[total_tracks].sector_size = 2048;
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nkeynes@168 | 141 | disc->track[total_tracks].flags = 0x41;
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nkeynes@168 | 142 | if( trk.sector_size != 0 ) {
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nkeynes@168 | 143 | ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
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nkeynes@168 | 144 | free(disc);
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nkeynes@168 | 145 | return NULL;
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nkeynes@168 | 146 | }
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nkeynes@168 | 147 | break;
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nkeynes@168 | 148 | case 2:
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nkeynes@168 | 149 | disc->track[total_tracks].flags = 0x41;
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nkeynes@168 | 150 | switch( trk.sector_size ) {
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nkeynes@168 | 151 | case 0:
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nkeynes@168 | 152 | disc->track[total_tracks].mode = GDROM_MODE2_XA1;
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nkeynes@168 | 153 | disc->track[total_tracks].sector_size = 2048;
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nkeynes@168 | 154 | break;
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nkeynes@168 | 155 | case 1:
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nkeynes@168 | 156 | disc->track[total_tracks].mode = GDROM_MODE2;
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nkeynes@168 | 157 | disc->track[total_tracks].sector_size = 2336;
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nkeynes@168 | 158 | break;
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nkeynes@168 | 159 | case 2:
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nkeynes@168 | 160 | default:
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nkeynes@168 | 161 | ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
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nkeynes@168 | 162 | free(disc);
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nkeynes@168 | 163 | return NULL;
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nkeynes@168 | 164 | }
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nkeynes@168 | 165 | break;
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nkeynes@168 | 166 | default:
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nkeynes@168 | 167 | ERROR( "Unsupported track mode %d", trk.mode );
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nkeynes@168 | 168 | free(disc);
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nkeynes@168 | 169 | return NULL;
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nkeynes@168 | 170 | }
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nkeynes@168 | 171 | disc->track[total_tracks].offset = posn +
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nkeynes@168 | 172 | trk.pregap_length * disc->track[total_tracks].sector_size ;
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nkeynes@168 | 173 | posn += trk.total_length * disc->track[total_tracks].sector_size;
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nkeynes@168 | 174 | total_tracks++;
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nkeynes@1 | 175 | lseek( fd, 12, SEEK_CUR );
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nkeynes@168 | 176 | if( new_fmt ) {
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nkeynes@168 | 177 | fseek( f, 90, SEEK_CUR );
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nkeynes@168 | 178 | } else {
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nkeynes@168 | 179 | fseek( f, 12, SEEK_CUR );
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nkeynes@168 | 180 | }
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nkeynes@168 | 181 | }
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nkeynes@1 | 182 | }
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nkeynes@168 | 183 | disc->track_count = total_tracks;
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nkeynes@168 | 184 | disc->file = f;
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nkeynes@168 | 185 | disc->filename = filename;
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nkeynes@168 | 186 | return disc;
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nkeynes@1 | 187 | }
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