lxdream 0.9.1| filename | src/gdrom/cdi.c |
| changeset | 168:203a72138e16 |
| prev | 31:495e480360d7 |
| next | 236:581a9f8bf6a6 |
| author | nkeynes |
| date | Fri Aug 04 01:38:30 2006 +0000 (17 years ago) |
| permissions | -rw-r--r-- |
| last change | Add more tile list limit tests Implement tile list limits in the ta core. Rename TA_TILEEND to TA_LISTEND |
| file | annotate | diff | log | raw |
1.1 --- a/src/gdrom/cdi.c Sun Dec 25 08:24:11 2005 +00001.2 +++ b/src/gdrom/cdi.c Fri Aug 04 01:38:30 2006 +00001.3 @@ -1,5 +1,5 @@1.4 /**1.5 - * $Id: cdi.c,v 1.2 2005-12-25 08:24:11 nkeynes Exp $1.6 + * $Id: cdi.c,v 1.3 2006-06-26 10:30:42 nkeynes Exp $1.7 *1.8 * CDI CD-image file support1.9 *1.10 @@ -22,10 +22,18 @@1.11 #include <fcntl.h>1.12 #include <errno.h>1.13 #include <sys/stat.h>1.14 -#include "cdi.h"1.15 +#include "gdrom/gdrom.h"1.17 -#define CDI_V2 0x800000041.18 -#define CDI_V3 0x800000051.19 +#define CDI_V2_ID 0x800000041.20 +#define CDI_V3_ID 0x800000051.21 +#define CDI_V35_ID 0x800000061.22 +1.23 +1.24 +static gboolean cdi_image_is_valid( FILE *f );1.25 +static gdrom_disc_t cdi_image_open( const gchar *filename, FILE *f );1.26 +1.27 +struct gdrom_image_class cdi_image_class = { "DiscJuggler", "cdi",1.28 + cdi_image_is_valid, cdi_image_open };1.30 static char track_start_marker[20] = { 0,0,1,0,0,0,255,255,255,255,1.31 0,0,1,0,0,0,255,255,255,255 };1.32 @@ -35,24 +43,6 @@1.33 uint32_t header_offset;1.34 };1.36 -struct cdi_track {1.37 - int file_posn;1.38 - int length; /* bytes */1.39 - int pregap; /* sectors */1.40 - int mode;1.41 - int sector_size;1.42 - int session;1.43 - struct cdi_track *next;1.44 -};1.45 -1.46 -struct cdi_handle {1.47 - int fd;1.48 - uint16_t num_sessions;1.49 - struct cdi_track *tracks;1.50 -};1.51 -1.52 -1.53 -1.54 struct cdi_track_data {1.55 char unknown[0x19];1.56 uint32_t pregap_length;1.57 @@ -67,105 +57,131 @@1.58 char unknown5[0x1D];1.59 } __attribute__((packed));1.61 -cdi_t cdi_open( char *filename )1.62 +gboolean cdi_image_is_valid( FILE *f )1.63 {1.64 -#define BAIL( x, ... ) { fprintf( stderr, x, __VA_ARGS__ ); if( fd != -1 ) close(fd); return NULL; }1.65 + int len;1.66 + struct cdi_trailer trail;1.68 - struct stat st;1.69 + fseek( f, -8, SEEK_END );1.70 + len = ftell(f)+8;1.71 + fread( &trail, sizeof(trail), 1, f );1.72 + if( trail.header_offset >= len ||1.73 + trail.header_offset == 0 )1.74 + return FALSE;1.75 + return trail.cdi_version == CDI_V2_ID || trail.cdi_version == CDI_V3_ID;1.76 +}1.77 +1.78 +gdrom_disc_t cdi_image_open( const gchar *filename, FILE *f )1.79 +{1.80 + gdrom_disc_t disc = NULL;1.81 int fd = -1, i,j, tmp;1.82 + uint16_t session_count;1.83 + uint16_t track_count;1.84 + int total_tracks = 0;1.85 int posn = 0, hdr;1.86 long len;1.87 struct cdi_trailer trail;1.88 - struct cdi_handle cdi;1.89 - uint16_t tracks;1.90 uint32_t new_fmt;1.91 char tmpc;1.92 char marker[20];1.94 - fd = open( filename, O_RDONLY );1.95 - if( fd == -1 )1.96 - BAIL( "Unable to open file: %s (%s)\n", filename, strerror(errno) );1.97 - fstat( fd, &st );1.98 - if( st.st_size < 8 )1.99 - BAIL( "File is too small to be a valid CDI image: %s\n", filename );1.100 - len = lseek( fd, -8, SEEK_END );1.101 - read( fd, &trail, sizeof(trail) );1.102 - if( trail.header_offset > st.st_size ||1.103 + fseek( f, -8, SEEK_END );1.104 + len = ftell(f)+8;1.105 + fread( &trail, sizeof(trail), 1, f );1.106 + if( trail.header_offset >= len ||1.107 trail.header_offset == 0 )1.108 - BAIL( "Not a valid CDI image: %s\n", filename );1.109 + return NULL;1.111 - if( trail.cdi_version == CDI_V2 ) trail.cdi_version = 2;1.112 - else if( trail.cdi_version == CDI_V3 ) trail.cdi_version = 3;1.113 - else BAIL( "Unknown CDI version code %08x in %s\n", trail.cdi_version,1.114 - filename );1.115 + if( trail.cdi_version == CDI_V2_ID ) trail.cdi_version = 2;1.116 + else if( trail.cdi_version == CDI_V3_ID ) trail.cdi_version = 3;1.117 + else return NULL;1.119 - lseek( fd, trail.header_offset, SEEK_SET );1.120 - read( fd, &cdi.num_sessions, 2 );1.121 + fseek( f, trail.header_offset, SEEK_SET );1.122 + fread( &session_count, sizeof(session_count), 1, f );1.124 + disc = gdrom_image_new(f);1.126 - printf( "CDI version: %d\n", trail.cdi_version );1.127 - printf( "Sessions: %d\n\n", cdi.num_sessions );1.128 - for( i=0; i< cdi.num_sessions; i++ ) {1.129 - read( fd, &tracks, 2 );1.130 - printf( "Session %d - %d tracks:\n", i+1, tracks );1.131 - for( j=0; j<tracks; j++ ) {1.132 + for( i=0; i< session_count; i++ ) {1.133 + fread( &track_count, sizeof(track_count), 1, f );1.134 + for( j=0; j<track_count; j++ ) {1.135 struct cdi_track_data trk;1.136 -1.137 - read( fd, &new_fmt, 4 );1.138 + uint32_t new_fmt = 0;1.139 + uint8_t fnamelen = 0;1.140 + fread( &new_fmt, sizeof(new_fmt), 1, f );1.141 if( new_fmt != 0 ) { /* Additional data 3.00.780+ ?? */1.142 - printf( "Note: CDI image has 3.00.780+ flag set\n" );1.143 - lseek( fd, 8, SEEK_CUR );1.144 + fseek( f, 8, SEEK_CUR ); /* Skip */1.145 }1.146 - read( fd, marker, 20 );1.147 - if( memcmp( marker, track_start_marker, 20) != 0 )1.148 - BAIL( "Track start marker not found, error reading cdi\n",NULL );1.149 - read( fd, &tmp, 4 );1.150 - printf( "Unknown 4 bytes: %08x\n", tmp );1.151 - read( fd, &tmpc, 1 );1.152 - lseek( fd, (int)tmpc, SEEK_CUR ); /* skip over the filename */1.153 - read( fd, &trk, sizeof(trk) );1.154 - switch( trk.sector_size ) {1.155 - case 0: trk.sector_size = 2048; hdr=0; break;1.156 - case 1: trk.sector_size = 2336; hdr=8; break;1.157 - case 2:1.158 - trk.sector_size = 2352;1.159 - if( trk.mode == 2 ) hdr=24;1.160 - else hdr=16;1.161 - break;1.162 - default: BAIL( "Unknown sector size: %d\n", trk.sector_size );1.163 - }1.164 - posn += hdr;1.165 - len = trk.length*trk.sector_size;1.166 - printf( " Track %d\n", j+1 );1.167 - printf( " Pregap: %08x\n", trk.pregap_length );1.168 - printf( " Length: %08x\n", trk.length );1.169 - printf( " Mode: %d\n", trk.mode );1.170 - printf( " Sector size: %d\n", trk.sector_size );1.171 - printf( " Start LBA: %08x\n", trk.start_lba );1.172 - printf( " Total length: %08x\n", trk.total_length );1.173 - printf( " ---\n" );1.174 - printf( " File position: %08x\n", posn+trk.pregap_length*trk.sector_size );1.175 - printf( " File length: %d\n", len );1.176 - posn += trk.total_length*trk.sector_size;1.177 + fread( marker, 20, 1, f );1.178 + if( memcmp( marker, track_start_marker, 20) != 0 ) {1.179 + ERROR( "Track start marker not found, error reading cdi image\n" );1.180 + free(disc);1.181 + return NULL;1.182 + }1.183 + fseek( f, 4, SEEK_CUR );1.184 + fread( &fnamelen, 1, 1, f );1.185 + fseek( f, (int)fnamelen, SEEK_CUR ); /* skip over the filename */1.186 + fread( &trk, sizeof(trk), 1, f );1.187 + disc->track[total_tracks].session = i;1.188 + disc->track[total_tracks].lba = trk.start_lba;1.189 + disc->track[total_tracks].sector_count = trk.length;1.190 + switch( trk.mode ) {1.191 + case 0:1.192 + disc->track[total_tracks].mode = GDROM_CDDA;1.193 + disc->track[total_tracks].sector_size = 2352;1.194 + disc->track[total_tracks].flags = 0x01;1.195 + if( trk.sector_size != 2 ) {1.196 + ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );1.197 + free(disc);1.198 + return NULL;1.199 + }1.200 + break;1.201 + case 1:1.202 + disc->track[total_tracks].mode = GDROM_MODE1;1.203 + disc->track[total_tracks].sector_size = 2048;1.204 + disc->track[total_tracks].flags = 0x41;1.205 + if( trk.sector_size != 0 ) {1.206 + ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );1.207 + free(disc);1.208 + return NULL;1.209 + }1.210 + break;1.211 + case 2:1.212 + disc->track[total_tracks].flags = 0x41;1.213 + switch( trk.sector_size ) {1.214 + case 0:1.215 + disc->track[total_tracks].mode = GDROM_MODE2_XA1;1.216 + disc->track[total_tracks].sector_size = 2048;1.217 + break;1.218 + case 1:1.219 + disc->track[total_tracks].mode = GDROM_MODE2;1.220 + disc->track[total_tracks].sector_size = 2336;1.221 + break;1.222 + case 2:1.223 + default:1.224 + ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );1.225 + free(disc);1.226 + return NULL;1.227 + }1.228 + break;1.229 + default:1.230 + ERROR( "Unsupported track mode %d", trk.mode );1.231 + free(disc);1.232 + return NULL;1.233 + }1.234 + disc->track[total_tracks].offset = posn +1.235 + trk.pregap_length * disc->track[total_tracks].sector_size ;1.236 + posn += trk.total_length * disc->track[total_tracks].sector_size;1.237 + total_tracks++;1.238 lseek( fd, 12, SEEK_CUR );1.239 - if( new_fmt )1.240 - lseek( fd, 78, SEEK_CUR );1.241 - tmp = lseek( fd, 0, SEEK_CUR );1.242 - printf( "(Header offset: %x)\n", tmp - trail.header_offset );1.243 - }1.244 + if( new_fmt ) {1.245 + fseek( f, 90, SEEK_CUR );1.246 + } else {1.247 + fseek( f, 12, SEEK_CUR );1.248 + }1.249 + }1.250 }1.251 -1.252 - return NULL;1.253 -#undef BAIL(x, ...)1.254 + disc->track_count = total_tracks;1.255 + disc->file = f;1.256 + disc->filename = filename;1.257 + return disc;1.258 }1.259 -1.260 -int main(int argc, char *argv[] )1.261 -{1.262 - int i;1.263 -1.264 - for( i=1; i<argc; i++ ) {1.265 - cdi_open(argv[i]);1.266 - }1.267 - return 0;1.268 -}1.269 -
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