filename | src/gdrom/cdi.c |
changeset | 31:495e480360d7 |
prev | 1:eea311cfd33e |
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author | nkeynes |
date | Sun Feb 05 04:05:27 2006 +0000 (18 years ago) |
permissions | -rw-r--r-- |
last change | Video code reshuffle to start getting real video happening. Implement colourspace conversions Various tweaks |
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nkeynes@31 | 1 | /** |
nkeynes@31 | 2 | * $Id: cdi.c,v 1.2 2005-12-25 08:24:11 nkeynes Exp $ |
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@1 | 22 | #include <fcntl.h> |
nkeynes@1 | 23 | #include <errno.h> |
nkeynes@1 | 24 | #include <sys/stat.h> |
nkeynes@1 | 25 | #include "cdi.h" |
nkeynes@1 | 26 | |
nkeynes@1 | 27 | #define CDI_V2 0x80000004 |
nkeynes@1 | 28 | #define CDI_V3 0x80000005 |
nkeynes@1 | 29 | |
nkeynes@1 | 30 | static char track_start_marker[20] = { 0,0,1,0,0,0,255,255,255,255, |
nkeynes@1 | 31 | 0,0,1,0,0,0,255,255,255,255 }; |
nkeynes@1 | 32 | |
nkeynes@1 | 33 | struct cdi_trailer { |
nkeynes@1 | 34 | uint32_t cdi_version; |
nkeynes@1 | 35 | uint32_t header_offset; |
nkeynes@1 | 36 | }; |
nkeynes@1 | 37 | |
nkeynes@1 | 38 | struct cdi_track { |
nkeynes@1 | 39 | int file_posn; |
nkeynes@1 | 40 | int length; /* bytes */ |
nkeynes@1 | 41 | int pregap; /* sectors */ |
nkeynes@1 | 42 | int mode; |
nkeynes@1 | 43 | int sector_size; |
nkeynes@1 | 44 | int session; |
nkeynes@1 | 45 | struct cdi_track *next; |
nkeynes@1 | 46 | }; |
nkeynes@1 | 47 | |
nkeynes@1 | 48 | struct cdi_handle { |
nkeynes@1 | 49 | int fd; |
nkeynes@1 | 50 | uint16_t num_sessions; |
nkeynes@1 | 51 | struct cdi_track *tracks; |
nkeynes@1 | 52 | }; |
nkeynes@1 | 53 | |
nkeynes@1 | 54 | |
nkeynes@1 | 55 | |
nkeynes@1 | 56 | struct cdi_track_data { |
nkeynes@1 | 57 | char unknown[0x19]; |
nkeynes@1 | 58 | uint32_t pregap_length; |
nkeynes@1 | 59 | uint32_t length; |
nkeynes@1 | 60 | char unknown2[6]; |
nkeynes@1 | 61 | uint32_t mode; |
nkeynes@1 | 62 | char unknown3[0x0c]; |
nkeynes@1 | 63 | uint32_t start_lba; |
nkeynes@1 | 64 | uint32_t total_length; |
nkeynes@1 | 65 | char unknown4[0x10]; |
nkeynes@1 | 66 | uint32_t sector_size; |
nkeynes@1 | 67 | char unknown5[0x1D]; |
nkeynes@1 | 68 | } __attribute__((packed)); |
nkeynes@1 | 69 | |
nkeynes@1 | 70 | cdi_t cdi_open( char *filename ) |
nkeynes@1 | 71 | { |
nkeynes@1 | 72 | #define BAIL( x, ... ) { fprintf( stderr, x, __VA_ARGS__ ); if( fd != -1 ) close(fd); return NULL; } |
nkeynes@1 | 73 | |
nkeynes@1 | 74 | struct stat st; |
nkeynes@1 | 75 | int fd = -1, i,j, tmp; |
nkeynes@1 | 76 | int posn = 0, hdr; |
nkeynes@1 | 77 | long len; |
nkeynes@1 | 78 | struct cdi_trailer trail; |
nkeynes@1 | 79 | struct cdi_handle cdi; |
nkeynes@1 | 80 | uint16_t tracks; |
nkeynes@1 | 81 | uint32_t new_fmt; |
nkeynes@1 | 82 | char tmpc; |
nkeynes@1 | 83 | char marker[20]; |
nkeynes@1 | 84 | |
nkeynes@1 | 85 | fd = open( filename, O_RDONLY ); |
nkeynes@1 | 86 | if( fd == -1 ) |
nkeynes@1 | 87 | BAIL( "Unable to open file: %s (%s)\n", filename, strerror(errno) ); |
nkeynes@1 | 88 | fstat( fd, &st ); |
nkeynes@1 | 89 | if( st.st_size < 8 ) |
nkeynes@1 | 90 | BAIL( "File is too small to be a valid CDI image: %s\n", filename ); |
nkeynes@1 | 91 | len = lseek( fd, -8, SEEK_END ); |
nkeynes@1 | 92 | read( fd, &trail, sizeof(trail) ); |
nkeynes@1 | 93 | if( trail.header_offset > st.st_size || |
nkeynes@1 | 94 | trail.header_offset == 0 ) |
nkeynes@1 | 95 | BAIL( "Not a valid CDI image: %s\n", filename ); |
nkeynes@1 | 96 | |
nkeynes@1 | 97 | if( trail.cdi_version == CDI_V2 ) trail.cdi_version = 2; |
nkeynes@1 | 98 | else if( trail.cdi_version == CDI_V3 ) trail.cdi_version = 3; |
nkeynes@1 | 99 | else BAIL( "Unknown CDI version code %08x in %s\n", trail.cdi_version, |
nkeynes@1 | 100 | filename ); |
nkeynes@1 | 101 | |
nkeynes@1 | 102 | lseek( fd, trail.header_offset, SEEK_SET ); |
nkeynes@1 | 103 | read( fd, &cdi.num_sessions, 2 ); |
nkeynes@1 | 104 | |
nkeynes@1 | 105 | |
nkeynes@1 | 106 | printf( "CDI version: %d\n", trail.cdi_version ); |
nkeynes@1 | 107 | printf( "Sessions: %d\n\n", cdi.num_sessions ); |
nkeynes@1 | 108 | for( i=0; i< cdi.num_sessions; i++ ) { |
nkeynes@1 | 109 | read( fd, &tracks, 2 ); |
nkeynes@1 | 110 | printf( "Session %d - %d tracks:\n", i+1, tracks ); |
nkeynes@1 | 111 | for( j=0; j<tracks; j++ ) { |
nkeynes@1 | 112 | struct cdi_track_data trk; |
nkeynes@1 | 113 | |
nkeynes@1 | 114 | read( fd, &new_fmt, 4 ); |
nkeynes@1 | 115 | if( new_fmt != 0 ) { /* Additional data 3.00.780+ ?? */ |
nkeynes@1 | 116 | printf( "Note: CDI image has 3.00.780+ flag set\n" ); |
nkeynes@1 | 117 | lseek( fd, 8, SEEK_CUR ); |
nkeynes@1 | 118 | } |
nkeynes@1 | 119 | read( fd, marker, 20 ); |
nkeynes@1 | 120 | if( memcmp( marker, track_start_marker, 20) != 0 ) |
nkeynes@1 | 121 | BAIL( "Track start marker not found, error reading cdi\n",NULL ); |
nkeynes@1 | 122 | read( fd, &tmp, 4 ); |
nkeynes@1 | 123 | printf( "Unknown 4 bytes: %08x\n", tmp ); |
nkeynes@1 | 124 | read( fd, &tmpc, 1 ); |
nkeynes@1 | 125 | lseek( fd, (int)tmpc, SEEK_CUR ); /* skip over the filename */ |
nkeynes@1 | 126 | read( fd, &trk, sizeof(trk) ); |
nkeynes@1 | 127 | switch( trk.sector_size ) { |
nkeynes@1 | 128 | case 0: trk.sector_size = 2048; hdr=0; break; |
nkeynes@1 | 129 | case 1: trk.sector_size = 2336; hdr=8; break; |
nkeynes@1 | 130 | case 2: |
nkeynes@1 | 131 | trk.sector_size = 2352; |
nkeynes@1 | 132 | if( trk.mode == 2 ) hdr=24; |
nkeynes@1 | 133 | else hdr=16; |
nkeynes@1 | 134 | break; |
nkeynes@1 | 135 | default: BAIL( "Unknown sector size: %d\n", trk.sector_size ); |
nkeynes@1 | 136 | } |
nkeynes@1 | 137 | posn += hdr; |
nkeynes@1 | 138 | len = trk.length*trk.sector_size; |
nkeynes@1 | 139 | printf( " Track %d\n", j+1 ); |
nkeynes@1 | 140 | printf( " Pregap: %08x\n", trk.pregap_length ); |
nkeynes@1 | 141 | printf( " Length: %08x\n", trk.length ); |
nkeynes@1 | 142 | printf( " Mode: %d\n", trk.mode ); |
nkeynes@1 | 143 | printf( " Sector size: %d\n", trk.sector_size ); |
nkeynes@1 | 144 | printf( " Start LBA: %08x\n", trk.start_lba ); |
nkeynes@1 | 145 | printf( " Total length: %08x\n", trk.total_length ); |
nkeynes@1 | 146 | printf( " ---\n" ); |
nkeynes@1 | 147 | printf( " File position: %08x\n", posn+trk.pregap_length*trk.sector_size ); |
nkeynes@1 | 148 | printf( " File length: %d\n", len ); |
nkeynes@1 | 149 | posn += trk.total_length*trk.sector_size; |
nkeynes@1 | 150 | lseek( fd, 12, SEEK_CUR ); |
nkeynes@1 | 151 | if( new_fmt ) |
nkeynes@1 | 152 | lseek( fd, 78, SEEK_CUR ); |
nkeynes@1 | 153 | tmp = lseek( fd, 0, SEEK_CUR ); |
nkeynes@1 | 154 | printf( "(Header offset: %x)\n", tmp - trail.header_offset ); |
nkeynes@1 | 155 | } |
nkeynes@1 | 156 | } |
nkeynes@1 | 157 | |
nkeynes@1 | 158 | return NULL; |
nkeynes@1 | 159 | #undef BAIL(x, ...) |
nkeynes@1 | 160 | } |
nkeynes@1 | 161 | |
nkeynes@1 | 162 | int main(int argc, char *argv[] ) |
nkeynes@1 | 163 | { |
nkeynes@1 | 164 | int i; |
nkeynes@1 | 165 | |
nkeynes@1 | 166 | for( i=1; i<argc; i++ ) { |
nkeynes@1 | 167 | cdi_open(argv[i]); |
nkeynes@1 | 168 | } |
nkeynes@1 | 169 | return 0; |
nkeynes@1 | 170 | } |
nkeynes@1 | 171 |
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