nkeynes@31 | 1 | /**
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nkeynes@561 | 2 | * $Id$
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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@759 | 22 | #include <string.h>
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nkeynes@1 | 23 | #include <fcntl.h>
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nkeynes@1 | 24 | #include <errno.h>
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nkeynes@1 | 25 | #include <sys/stat.h>
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nkeynes@1097 | 26 | #include "drivers/cdrom/cdimpl.h"
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nkeynes@1 | 27 |
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nkeynes@168 | 28 | #define CDI_V2_ID 0x80000004
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nkeynes@168 | 29 | #define CDI_V3_ID 0x80000005
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nkeynes@168 | 30 | #define CDI_V35_ID 0x80000006
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nkeynes@168 | 31 |
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nkeynes@168 | 32 |
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nkeynes@168 | 33 | static gboolean cdi_image_is_valid( FILE *f );
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nkeynes@1097 | 34 | static gboolean cdi_image_read_toc( cdrom_disc_t disc, ERROR *err );
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nkeynes@168 | 35 |
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nkeynes@1097 | 36 | struct cdrom_disc_factory cdi_disc_factory = { "DiscJuggler", "cdi",
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nkeynes@1097 | 37 | cdi_image_is_valid, NULL, cdi_image_read_toc };
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nkeynes@1 | 38 |
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nkeynes@347 | 39 | static const char TRACK_START_MARKER[20] = { 0,0,1,0,0,0,255,255,255,255,
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nkeynes@736 | 40 | 0,0,1,0,0,0,255,255,255,255 };
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nkeynes@347 | 41 | static const char EXT_MARKER[9] = {0,255,255,255,255,255,255,255,255 };
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nkeynes@1 | 42 |
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nkeynes@1 | 43 | struct cdi_trailer {
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nkeynes@1 | 44 | uint32_t cdi_version;
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nkeynes@1 | 45 | uint32_t header_offset;
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nkeynes@1 | 46 | };
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nkeynes@1 | 47 |
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nkeynes@1 | 48 | struct cdi_track_data {
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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@736 | 70 | trail.header_offset == 0 )
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nkeynes@736 | 71 | return FALSE;
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nkeynes@453 | 72 | return trail.cdi_version == CDI_V2_ID || trail.cdi_version == CDI_V3_ID ||
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nkeynes@736 | 73 | trail.cdi_version == CDI_V35_ID;
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nkeynes@168 | 74 | }
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nkeynes@168 | 75 |
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nkeynes@1109 | 76 | #define RETURN_PARSE_ERROR( ... ) do { SET_ERROR(err, LX_ERR_FILE_INVALID, __VA_ARGS__); return FALSE; } while(0)
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nkeynes@1097 | 77 |
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nkeynes@1097 | 78 | static gboolean cdi_image_read_toc( cdrom_disc_t disc, ERROR *err )
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nkeynes@168 | 79 | {
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nkeynes@422 | 80 | int i,j;
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nkeynes@168 | 81 | uint16_t session_count;
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nkeynes@168 | 82 | uint16_t track_count;
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nkeynes@168 | 83 | int total_tracks = 0;
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nkeynes@422 | 84 | int posn = 0;
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nkeynes@1 | 85 | long len;
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nkeynes@1 | 86 | struct cdi_trailer trail;
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nkeynes@1 | 87 | char marker[20];
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nkeynes@1 | 88 |
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nkeynes@1097 | 89 | FILE *f = cdrom_disc_get_base_file(disc);
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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@1097 | 94 | trail.header_offset == 0 ) {
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nkeynes@1097 | 95 | RETURN_PARSE_ERROR( "Invalid CDI image" );
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nkeynes@1097 | 96 | }
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nkeynes@736 | 97 |
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nkeynes@453 | 98 | if( trail.cdi_version != CDI_V2_ID && trail.cdi_version != CDI_V3_ID &&
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nkeynes@736 | 99 | trail.cdi_version != CDI_V35_ID ) {
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nkeynes@1097 | 100 | RETURN_PARSE_ERROR( "Invalid CDI image" );
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nkeynes@453 | 101 | }
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nkeynes@1 | 102 |
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nkeynes@453 | 103 | if( trail.cdi_version == CDI_V35_ID ) {
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nkeynes@999 | 104 | fseek( f, -(long)trail.header_offset, SEEK_END );
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nkeynes@453 | 105 | } else {
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nkeynes@736 | 106 | fseek( f, trail.header_offset, SEEK_SET );
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nkeynes@453 | 107 | }
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nkeynes@168 | 108 | fread( &session_count, sizeof(session_count), 1, f );
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nkeynes@736 | 109 |
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nkeynes@168 | 110 | for( i=0; i< session_count; i++ ) {
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nkeynes@736 | 111 | fread( &track_count, sizeof(track_count), 1, f );
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nkeynes@1180 | 112 | if( (i != session_count-1 && track_count < 1) || track_count > 99 ) {
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nkeynes@1180 | 113 | RETURN_PARSE_ERROR("Invalid number of tracks (%d), bad cdi image", track_count);
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nkeynes@1180 | 114 | }
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nkeynes@736 | 115 | if( track_count + total_tracks > 99 ) {
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nkeynes@1180 | 116 | RETURN_PARSE_ERROR("Invalid number of tracks in disc, bad cdi image" );
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nkeynes@736 | 117 | }
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nkeynes@168 | 118 | for( j=0; j<track_count; j++ ) {
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nkeynes@1 | 119 | struct cdi_track_data trk;
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nkeynes@168 | 120 | uint32_t new_fmt = 0;
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nkeynes@736 | 121 | uint8_t fnamelen = 0;
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nkeynes@168 | 122 | fread( &new_fmt, sizeof(new_fmt), 1, f );
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nkeynes@1 | 123 | if( new_fmt != 0 ) { /* Additional data 3.00.780+ ?? */
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nkeynes@736 | 124 | fseek( f, 8, SEEK_CUR ); /* Skip */
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nkeynes@1 | 125 | }
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nkeynes@168 | 126 | fread( marker, 20, 1, f );
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nkeynes@347 | 127 | if( memcmp( marker, TRACK_START_MARKER, 20) != 0 ) {
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nkeynes@1097 | 128 | RETURN_PARSE_ERROR( "Track start marker not found, error reading cdi image" );
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nkeynes@736 | 129 | }
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nkeynes@736 | 130 | fseek( f, 4, SEEK_CUR );
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nkeynes@168 | 131 | fread( &fnamelen, 1, 1, f );
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nkeynes@168 | 132 | fseek( f, (int)fnamelen, SEEK_CUR ); /* skip over the filename */
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nkeynes@736 | 133 | fseek( f, 19, SEEK_CUR );
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nkeynes@736 | 134 | fread( &new_fmt, sizeof(new_fmt), 1, f );
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nkeynes@736 | 135 | if( new_fmt == 0x80000000 ) {
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nkeynes@736 | 136 | fseek( f, 10, SEEK_CUR );
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nkeynes@736 | 137 | } else {
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nkeynes@736 | 138 | fseek( f, 2, SEEK_CUR );
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nkeynes@736 | 139 | }
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nkeynes@168 | 140 | fread( &trk, sizeof(trk), 1, f );
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nkeynes@1097 | 141 | disc->track[total_tracks].sessionno = i+1;
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nkeynes@1097 | 142 | disc->track[total_tracks].lba = trk.start_lba;
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nkeynes@1097 | 143 | cdrom_count_t sector_count = trk.length;
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nkeynes@1097 | 144 | sector_mode_t mode;
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nkeynes@736 | 145 | switch( trk.mode ) {
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nkeynes@736 | 146 | case 0:
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nkeynes@1097 | 147 | mode = SECTOR_CDDA;
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nkeynes@1023 | 148 | disc->track[total_tracks].flags = 0x01;
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nkeynes@736 | 149 | if( trk.sector_size != 2 ) {
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nkeynes@1097 | 150 | RETURN_PARSE_ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
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nkeynes@736 | 151 | }
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nkeynes@736 | 152 | break;
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nkeynes@736 | 153 | case 1:
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nkeynes@1097 | 154 | mode = SECTOR_MODE1;
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nkeynes@1023 | 155 | disc->track[total_tracks].flags = 0x41;
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nkeynes@736 | 156 | if( trk.sector_size != 0 ) {
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nkeynes@1097 | 157 | RETURN_PARSE_ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
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nkeynes@736 | 158 | }
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nkeynes@736 | 159 | break;
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nkeynes@736 | 160 | case 2:
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nkeynes@1023 | 161 | disc->track[total_tracks].flags = 0x41;
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nkeynes@736 | 162 | switch( trk.sector_size ) {
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nkeynes@736 | 163 | case 0:
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nkeynes@1097 | 164 | mode = SECTOR_MODE2_FORM1;
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nkeynes@736 | 165 | break;
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nkeynes@736 | 166 | case 1:
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nkeynes@1097 | 167 | mode = SECTOR_SEMIRAW_MODE2;
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nkeynes@736 | 168 | break;
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nkeynes@736 | 169 | case 2:
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nkeynes@736 | 170 | default:
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nkeynes@1097 | 171 | RETURN_PARSE_ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
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nkeynes@736 | 172 | }
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nkeynes@736 | 173 | break;
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nkeynes@1097 | 174 | default:
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nkeynes@1097 | 175 | RETURN_PARSE_ERROR( "Unsupported track mode %d", trk.mode );
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nkeynes@736 | 176 | }
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nkeynes@1097 | 177 | uint32_t offset = posn +
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nkeynes@1097 | 178 | trk.pregap_length * CDROM_SECTOR_SIZE(mode);
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nkeynes@1097 | 179 | disc->track[total_tracks].source = file_sector_source_new_source( disc->base_source, mode, offset, sector_count );
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nkeynes@1097 | 180 | posn += trk.total_length * CDROM_SECTOR_SIZE(mode);
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nkeynes@736 | 181 | total_tracks++;
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nkeynes@1180 | 182 | if( trail.cdi_version != CDI_V2_ID ) {
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nkeynes@1180 | 183 | uint32_t extmarker;
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nkeynes@1180 | 184 | fseek( f, 5, SEEK_CUR );
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nkeynes@1180 | 185 | fread( &extmarker, sizeof(extmarker), 1, f);
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nkeynes@1180 | 186 | if( extmarker == 0xFFFFFFFF ) {
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nkeynes@1180 | 187 | fseek( f, 78, SEEK_CUR );
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nkeynes@1180 | 188 | }
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nkeynes@736 | 189 | }
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nkeynes@736 | 190 | }
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nkeynes@736 | 191 | fseek( f, 12, SEEK_CUR );
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nkeynes@1180 | 192 | if( trail.cdi_version != CDI_V2_ID ) {
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nkeynes@1180 | 193 | fseek( f, 1, SEEK_CUR );
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nkeynes@1180 | 194 | }
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nkeynes@1 | 195 | }
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nkeynes@1097 | 196 |
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nkeynes@1023 | 197 | disc->track_count = total_tracks;
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nkeynes@1097 | 198 | disc->session_count = session_count;
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nkeynes@1097 | 199 | return TRUE;
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nkeynes@1 | 200 | }
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