lxdream 0.9.1| filename | src/gdrom/cdi.c |
| changeset | 1:eea311cfd33e |
| next | 31:495e480360d7 |
| author | nkeynes |
| date | Thu Dec 08 13:38:00 2005 +0000 (18 years ago) |
| permissions | -rw-r--r-- |
| last change | Generalise the core debug window to allow multiple instances. Add cpu description structure to define different cpus for use by the debug window, in preparation for ARM implementation |
| file | annotate | diff | log | raw |
1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +00001.2 +++ b/src/gdrom/cdi.c Thu Dec 08 13:38:00 2005 +00001.3 @@ -0,0 +1,154 @@1.4 +1.5 +#include <stdlib.h>1.6 +#include <stdio.h>1.7 +#include <stdint.h>1.8 +#include <fcntl.h>1.9 +#include <errno.h>1.10 +#include <sys/stat.h>1.11 +#include "cdi.h"1.12 +1.13 +#define CDI_V2 0x800000041.14 +#define CDI_V3 0x800000051.15 +1.16 +static char track_start_marker[20] = { 0,0,1,0,0,0,255,255,255,255,1.17 + 0,0,1,0,0,0,255,255,255,255 };1.18 +1.19 +struct cdi_trailer {1.20 + uint32_t cdi_version;1.21 + uint32_t header_offset;1.22 +};1.23 +1.24 +struct cdi_track {1.25 + int file_posn;1.26 + int length; /* bytes */1.27 + int pregap; /* sectors */1.28 + int mode;1.29 + int sector_size;1.30 + int session;1.31 + struct cdi_track *next;1.32 +};1.33 +1.34 +struct cdi_handle {1.35 + int fd;1.36 + uint16_t num_sessions;1.37 + struct cdi_track *tracks;1.38 +};1.39 +1.40 +1.41 +1.42 +struct cdi_track_data {1.43 + char unknown[0x19];1.44 + uint32_t pregap_length;1.45 + uint32_t length;1.46 + char unknown2[6];1.47 + uint32_t mode;1.48 + char unknown3[0x0c];1.49 + uint32_t start_lba;1.50 + uint32_t total_length;1.51 + char unknown4[0x10];1.52 + uint32_t sector_size;1.53 + char unknown5[0x1D];1.54 +} __attribute__((packed));1.55 +1.56 +cdi_t cdi_open( char *filename )1.57 +{1.58 +#define BAIL( x, ... ) { fprintf( stderr, x, __VA_ARGS__ ); if( fd != -1 ) close(fd); return NULL; }1.59 +1.60 + struct stat st;1.61 + int fd = -1, i,j, tmp;1.62 + int posn = 0, hdr;1.63 + long len;1.64 + struct cdi_trailer trail;1.65 + struct cdi_handle cdi;1.66 + uint16_t tracks;1.67 + uint32_t new_fmt;1.68 + char tmpc;1.69 + char marker[20];1.70 +1.71 + fd = open( filename, O_RDONLY );1.72 + if( fd == -1 )1.73 + BAIL( "Unable to open file: %s (%s)\n", filename, strerror(errno) );1.74 + fstat( fd, &st );1.75 + if( st.st_size < 8 )1.76 + BAIL( "File is too small to be a valid CDI image: %s\n", filename );1.77 + len = lseek( fd, -8, SEEK_END );1.78 + read( fd, &trail, sizeof(trail) );1.79 + if( trail.header_offset > st.st_size ||1.80 + trail.header_offset == 0 )1.81 + BAIL( "Not a valid CDI image: %s\n", filename );1.82 +1.83 + if( trail.cdi_version == CDI_V2 ) trail.cdi_version = 2;1.84 + else if( trail.cdi_version == CDI_V3 ) trail.cdi_version = 3;1.85 + else BAIL( "Unknown CDI version code %08x in %s\n", trail.cdi_version,1.86 + filename );1.87 +1.88 + lseek( fd, trail.header_offset, SEEK_SET );1.89 + read( fd, &cdi.num_sessions, 2 );1.90 +1.91 +1.92 + printf( "CDI version: %d\n", trail.cdi_version );1.93 + printf( "Sessions: %d\n\n", cdi.num_sessions );1.94 + for( i=0; i< cdi.num_sessions; i++ ) {1.95 + read( fd, &tracks, 2 );1.96 + printf( "Session %d - %d tracks:\n", i+1, tracks );1.97 + for( j=0; j<tracks; j++ ) {1.98 + struct cdi_track_data trk;1.99 +1.100 + read( fd, &new_fmt, 4 );1.101 + if( new_fmt != 0 ) { /* Additional data 3.00.780+ ?? */1.102 + printf( "Note: CDI image has 3.00.780+ flag set\n" );1.103 + lseek( fd, 8, SEEK_CUR );1.104 + }1.105 + read( fd, marker, 20 );1.106 + if( memcmp( marker, track_start_marker, 20) != 0 )1.107 + BAIL( "Track start marker not found, error reading cdi\n",NULL );1.108 + read( fd, &tmp, 4 );1.109 + printf( "Unknown 4 bytes: %08x\n", tmp );1.110 + read( fd, &tmpc, 1 );1.111 + lseek( fd, (int)tmpc, SEEK_CUR ); /* skip over the filename */1.112 + read( fd, &trk, sizeof(trk) );1.113 + switch( trk.sector_size ) {1.114 + case 0: trk.sector_size = 2048; hdr=0; break;1.115 + case 1: trk.sector_size = 2336; hdr=8; break;1.116 + case 2:1.117 + trk.sector_size = 2352;1.118 + if( trk.mode == 2 ) hdr=24;1.119 + else hdr=16;1.120 + break;1.121 + default: BAIL( "Unknown sector size: %d\n", trk.sector_size );1.122 + }1.123 + posn += hdr;1.124 + len = trk.length*trk.sector_size;1.125 + printf( " Track %d\n", j+1 );1.126 + printf( " Pregap: %08x\n", trk.pregap_length );1.127 + printf( " Length: %08x\n", trk.length );1.128 + printf( " Mode: %d\n", trk.mode );1.129 + printf( " Sector size: %d\n", trk.sector_size );1.130 + printf( " Start LBA: %08x\n", trk.start_lba );1.131 + printf( " Total length: %08x\n", trk.total_length );1.132 + printf( " ---\n" );1.133 + printf( " File position: %08x\n", posn+trk.pregap_length*trk.sector_size );1.134 + printf( " File length: %d\n", len );1.135 + posn += trk.total_length*trk.sector_size;1.136 + lseek( fd, 12, SEEK_CUR );1.137 + if( new_fmt )1.138 + lseek( fd, 78, SEEK_CUR );1.139 + tmp = lseek( fd, 0, SEEK_CUR );1.140 + printf( "(Header offset: %x)\n", tmp - trail.header_offset );1.141 + }1.142 + }1.143 +1.144 + return NULL;1.145 +#undef BAIL(x, ...)1.146 +}1.147 +1.148 +int main(int argc, char *argv[] )1.149 +{1.150 + int i;1.151 +1.152 + for( i=1; i<argc; i++ ) {1.153 + cdi_open(argv[i]);1.154 + }1.155 + return 0;1.156 +}1.157 +
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