nkeynes@342 | 1 | /**
|
nkeynes@561 | 2 | * $Id$
|
nkeynes@342 | 3 | *
|
nkeynes@342 | 4 | * GD-Rom image-file common functions.
|
nkeynes@342 | 5 | *
|
nkeynes@342 | 6 | * Copyright (c) 2005 Nathan Keynes.
|
nkeynes@342 | 7 | *
|
nkeynes@342 | 8 | * This program is free software; you can redistribute it and/or modify
|
nkeynes@342 | 9 | * it under the terms of the GNU General Public License as published by
|
nkeynes@342 | 10 | * the Free Software Foundation; either version 2 of the License, or
|
nkeynes@342 | 11 | * (at your option) any later version.
|
nkeynes@342 | 12 | *
|
nkeynes@342 | 13 | * This program is distributed in the hope that it will be useful,
|
nkeynes@342 | 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
nkeynes@342 | 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
nkeynes@342 | 16 | * GNU General Public License for more details.
|
nkeynes@342 | 17 | */
|
nkeynes@342 | 18 |
|
nkeynes@644 | 19 | #include <assert.h>
|
nkeynes@759 | 20 | #include <stdlib.h>
|
nkeynes@736 | 21 | #include <string.h>
|
nkeynes@422 | 22 | #include <netinet/in.h>
|
nkeynes@422 | 23 |
|
nkeynes@678 | 24 | #include "gdrom/gddriver.h"
|
nkeynes@342 | 25 | #include "gdrom/packet.h"
|
nkeynes@644 | 26 | #include "ecc.h"
|
nkeynes@422 | 27 | #include "bootstrap.h"
|
nkeynes@342 | 28 |
|
nkeynes@342 | 29 | static void gdrom_image_destroy( gdrom_disc_t disc );
|
nkeynes@342 | 30 | static gdrom_error_t gdrom_image_read_sector( gdrom_disc_t disc, uint32_t lba, int mode,
|
nkeynes@736 | 31 | unsigned char *buf, uint32_t *readlength );
|
nkeynes@422 | 32 | static gdrom_error_t gdrom_image_read_toc( gdrom_disc_t disc, unsigned char *buf );
|
nkeynes@422 | 33 | static gdrom_error_t gdrom_image_read_session( gdrom_disc_t disc, int session, unsigned char *buf );
|
nkeynes@422 | 34 | static gdrom_error_t gdrom_image_read_position( gdrom_disc_t disc, uint32_t lba, unsigned char *buf );
|
nkeynes@342 | 35 | static int gdrom_image_drive_status( gdrom_disc_t disc );
|
nkeynes@342 | 36 |
|
nkeynes@644 | 37 | static uint8_t gdrom_default_sync[12] = { 0, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 0 };
|
nkeynes@644 | 38 |
|
nkeynes@644 | 39 | #define SECTOR_HEADER_SIZE 16
|
nkeynes@644 | 40 | #define SECTOR_SUBHEADER_SIZE 8
|
nkeynes@644 | 41 |
|
nkeynes@644 | 42 | /* Data offset (from start of raw sector) by sector mode */
|
nkeynes@644 | 43 | static int gdrom_data_offset[] = { 16, 16, 16, 24, 24, 0, 8, 0, 0 };
|
nkeynes@644 | 44 |
|
nkeynes@644 | 45 |
|
nkeynes@644 | 46 |
|
nkeynes@498 | 47 | struct cdrom_sector_header {
|
nkeynes@498 | 48 | uint8_t sync[12];
|
nkeynes@498 | 49 | uint8_t msf[3];
|
nkeynes@498 | 50 | uint8_t mode;
|
nkeynes@644 | 51 | uint8_t subhead[8]; // Mode-2 XA sectors only
|
nkeynes@498 | 52 | };
|
nkeynes@342 | 53 |
|
nkeynes@342 | 54 | /**
|
nkeynes@342 | 55 | * Initialize a gdrom_disc structure with the gdrom_image_* methods
|
nkeynes@342 | 56 | */
|
nkeynes@342 | 57 | void gdrom_image_init( gdrom_disc_t disc )
|
nkeynes@342 | 58 | {
|
nkeynes@342 | 59 | memset( disc, 0, sizeof(struct gdrom_disc) ); /* safety */
|
nkeynes@342 | 60 | disc->read_sector = gdrom_image_read_sector;
|
nkeynes@342 | 61 | disc->read_toc = gdrom_image_read_toc;
|
nkeynes@342 | 62 | disc->read_session = gdrom_image_read_session;
|
nkeynes@342 | 63 | disc->read_position = gdrom_image_read_position;
|
nkeynes@342 | 64 | disc->drive_status = gdrom_image_drive_status;
|
nkeynes@342 | 65 | disc->play_audio = NULL; /* not supported yet */
|
nkeynes@342 | 66 | disc->run_time_slice = NULL; /* not needed */
|
nkeynes@342 | 67 | disc->close = gdrom_image_destroy;
|
nkeynes@342 | 68 | }
|
nkeynes@342 | 69 |
|
nkeynes@464 | 70 | gdrom_disc_t gdrom_image_new( const gchar *filename, FILE *f )
|
nkeynes@342 | 71 | {
|
nkeynes@736 | 72 | gdrom_image_t image = (gdrom_image_t)g_malloc0(sizeof(struct gdrom_image));
|
nkeynes@342 | 73 | if( image == NULL ) {
|
nkeynes@736 | 74 | return NULL;
|
nkeynes@342 | 75 | }
|
nkeynes@644 | 76 | image->disc_type = IDE_DISC_CDROMXA;
|
nkeynes@342 | 77 | image->file = f;
|
nkeynes@342 | 78 | gdrom_disc_t disc = (gdrom_disc_t)image;
|
nkeynes@342 | 79 | gdrom_image_init(disc);
|
nkeynes@464 | 80 | if( filename == NULL ) {
|
nkeynes@736 | 81 | disc->name = NULL;
|
nkeynes@464 | 82 | } else {
|
nkeynes@736 | 83 | disc->name = g_strdup(filename);
|
nkeynes@464 | 84 | }
|
nkeynes@464 | 85 |
|
nkeynes@342 | 86 | return disc;
|
nkeynes@342 | 87 | }
|
nkeynes@342 | 88 |
|
nkeynes@342 | 89 | static void gdrom_image_destroy( gdrom_disc_t disc )
|
nkeynes@342 | 90 | {
|
nkeynes@492 | 91 | int i;
|
nkeynes@492 | 92 | FILE *lastfile = NULL;
|
nkeynes@342 | 93 | gdrom_image_t img = (gdrom_image_t)disc;
|
nkeynes@342 | 94 | if( img->file != NULL ) {
|
nkeynes@736 | 95 | fclose(img->file);
|
nkeynes@736 | 96 | img->file = NULL;
|
nkeynes@342 | 97 | }
|
nkeynes@492 | 98 | for( i=0; i<img->track_count; i++ ) {
|
nkeynes@736 | 99 | if( img->track[i].file != NULL && img->track[i].file != lastfile ) {
|
nkeynes@736 | 100 | lastfile = img->track[i].file;
|
nkeynes@736 | 101 | fclose(lastfile);
|
nkeynes@736 | 102 | img->track[i].file = NULL;
|
nkeynes@736 | 103 | }
|
nkeynes@492 | 104 | }
|
nkeynes@464 | 105 | if( disc->name != NULL ) {
|
nkeynes@736 | 106 | g_free( (gpointer)disc->name );
|
nkeynes@736 | 107 | disc->name = NULL;
|
nkeynes@464 | 108 | }
|
nkeynes@342 | 109 | free( disc );
|
nkeynes@342 | 110 | }
|
nkeynes@342 | 111 |
|
nkeynes@468 | 112 | void gdrom_image_destroy_no_close( gdrom_disc_t disc )
|
nkeynes@468 | 113 | {
|
nkeynes@492 | 114 | int i;
|
nkeynes@492 | 115 | FILE *lastfile = NULL;
|
nkeynes@468 | 116 | gdrom_image_t img = (gdrom_image_t)disc;
|
nkeynes@468 | 117 | if( img->file != NULL ) {
|
nkeynes@736 | 118 | img->file = NULL;
|
nkeynes@468 | 119 | }
|
nkeynes@492 | 120 | for( i=0; i<img->track_count; i++ ) {
|
nkeynes@736 | 121 | if( img->track[i].file != NULL && img->track[i].file != lastfile ) {
|
nkeynes@736 | 122 | lastfile = img->track[i].file;
|
nkeynes@736 | 123 | fclose(lastfile);
|
nkeynes@736 | 124 | img->track[i].file = NULL;
|
nkeynes@736 | 125 | }
|
nkeynes@492 | 126 | }
|
nkeynes@468 | 127 | if( disc->name != NULL ) {
|
nkeynes@736 | 128 | g_free( (gpointer)disc->name );
|
nkeynes@736 | 129 | disc->name = NULL;
|
nkeynes@468 | 130 | }
|
nkeynes@468 | 131 | free( disc );
|
nkeynes@468 | 132 | }
|
nkeynes@468 | 133 |
|
nkeynes@342 | 134 | static int gdrom_image_get_track_by_lba( gdrom_image_t image, uint32_t lba )
|
nkeynes@342 | 135 | {
|
nkeynes@342 | 136 | int i;
|
nkeynes@342 | 137 | for( i=0; i<image->track_count; i++ ) {
|
nkeynes@736 | 138 | if( image->track[i].lba <= lba &&
|
nkeynes@736 | 139 | lba < (image->track[i].lba + image->track[i].sector_count) ) {
|
nkeynes@736 | 140 | return i+1;
|
nkeynes@736 | 141 | }
|
nkeynes@342 | 142 | }
|
nkeynes@342 | 143 | return -1;
|
nkeynes@342 | 144 | }
|
nkeynes@342 | 145 |
|
nkeynes@492 | 146 | /**
|
nkeynes@492 | 147 | * Read a block from an image file, handling negative file offsets
|
nkeynes@492 | 148 | * with 0-fill.
|
nkeynes@492 | 149 | */
|
nkeynes@644 | 150 | static gboolean gdrom_read_block( unsigned char *buf, int file_offset, int length, FILE *f )
|
nkeynes@492 | 151 | {
|
nkeynes@492 | 152 | if( file_offset < 0 ) {
|
nkeynes@736 | 153 | int size = -file_offset;
|
nkeynes@736 | 154 | if( size >= length ) {
|
nkeynes@736 | 155 | memset( buf, 0, length );
|
nkeynes@736 | 156 | return TRUE;
|
nkeynes@736 | 157 | } else {
|
nkeynes@736 | 158 | memset( buf, 0, size );
|
nkeynes@736 | 159 | file_offset = 0;
|
nkeynes@736 | 160 | length -= size;
|
nkeynes@736 | 161 | }
|
nkeynes@492 | 162 | }
|
nkeynes@492 | 163 | fseek( f, file_offset, SEEK_SET );
|
nkeynes@644 | 164 | return fread( buf, length, 1, f ) == 1;
|
nkeynes@492 | 165 | }
|
nkeynes@492 | 166 |
|
nkeynes@644 | 167 | static void gdrom_build_sector_header( unsigned char *buf, uint32_t lba,
|
nkeynes@736 | 168 | gdrom_track_mode_t sector_mode )
|
nkeynes@644 | 169 | {
|
nkeynes@644 | 170 | memcpy( buf, gdrom_default_sync, 12 );
|
nkeynes@644 | 171 | cd_build_address( buf, sector_mode, lba );
|
nkeynes@644 | 172 | }
|
nkeynes@644 | 173 |
|
nkeynes@644 | 174 | /**
|
nkeynes@644 | 175 | * Return TRUE if the given read mode + track modes are compatible,
|
nkeynes@644 | 176 | * otherwise FALSE.
|
nkeynes@644 | 177 | * @param track_mode one of the GDROM_MODE* constants
|
nkeynes@644 | 178 | * @param read_mode the READ_CD_MODE from the read request
|
nkeynes@644 | 179 | */
|
nkeynes@644 | 180 | static gboolean gdrom_is_compatible_read_mode( int track_mode, int read_mode )
|
nkeynes@644 | 181 | {
|
nkeynes@644 | 182 | switch( read_mode ) {
|
nkeynes@644 | 183 | case READ_CD_MODE_ANY:
|
nkeynes@736 | 184 | return TRUE;
|
nkeynes@644 | 185 | case READ_CD_MODE_CDDA:
|
nkeynes@736 | 186 | return track_mode == GDROM_CDDA;
|
nkeynes@644 | 187 | case READ_CD_MODE_1:
|
nkeynes@736 | 188 | return track_mode == GDROM_MODE1 || track_mode == GDROM_MODE2_FORM1;
|
nkeynes@644 | 189 | case READ_CD_MODE_2_FORM_1:
|
nkeynes@736 | 190 | return track_mode == GDROM_MODE1 || track_mode == GDROM_MODE2_FORM1;
|
nkeynes@644 | 191 | case READ_CD_MODE_2_FORM_2:
|
nkeynes@736 | 192 | return track_mode == GDROM_MODE2_FORM2;
|
nkeynes@644 | 193 | case READ_CD_MODE_2:
|
nkeynes@736 | 194 | return track_mode == GDROM_MODE2_FORMLESS;
|
nkeynes@644 | 195 | default:
|
nkeynes@736 | 196 | return FALSE;
|
nkeynes@644 | 197 | }
|
nkeynes@644 | 198 | }
|
nkeynes@644 | 199 |
|
nkeynes@644 | 200 | /**
|
nkeynes@644 | 201 | * Determine the start position in a raw sector, and the amount of data to read
|
nkeynes@644 | 202 | * in bytes, for a given combination of sector mode and read mode.
|
nkeynes@644 | 203 | */
|
nkeynes@644 | 204 | static void gdrom_get_read_bounds( int sector_mode, int read_mode, int *start, int *size )
|
nkeynes@644 | 205 | {
|
nkeynes@644 | 206 | if( READ_CD_RAW(read_mode) ) {
|
nkeynes@736 | 207 | // whole sector
|
nkeynes@736 | 208 | *start = 0;
|
nkeynes@736 | 209 | *size = 2352;
|
nkeynes@644 | 210 | } else {
|
nkeynes@736 | 211 | *size = 0;
|
nkeynes@736 | 212 | if( READ_CD_DATA(read_mode) ) {
|
nkeynes@736 | 213 | *start = gdrom_data_offset[sector_mode];
|
nkeynes@736 | 214 | *size = gdrom_sector_size[sector_mode];
|
nkeynes@736 | 215 | }
|
nkeynes@644 | 216 |
|
nkeynes@736 | 217 | if( READ_CD_SUBHEAD(read_mode) &&
|
nkeynes@736 | 218 | (sector_mode == GDROM_MODE2_FORM1 || sector_mode == GDROM_MODE2_FORM2) ) {
|
nkeynes@736 | 219 | *start = SECTOR_HEADER_SIZE;
|
nkeynes@736 | 220 | *size += SECTOR_SUBHEADER_SIZE;
|
nkeynes@736 | 221 | }
|
nkeynes@644 | 222 |
|
nkeynes@736 | 223 | if( READ_CD_HEADER(read_mode) ) {
|
nkeynes@736 | 224 | *size += SECTOR_HEADER_SIZE;
|
nkeynes@736 | 225 | *start = 0;
|
nkeynes@736 | 226 | }
|
nkeynes@644 | 227 |
|
nkeynes@644 | 228 | }
|
nkeynes@644 | 229 | }
|
nkeynes@644 | 230 |
|
nkeynes@644 | 231 | /**
|
nkeynes@644 | 232 | * Read a single sector from a disc image. If you thought this would be simple,
|
nkeynes@644 | 233 | * I have just one thing to say to you: Bwahahahahahahahah.
|
nkeynes@644 | 234 | *
|
nkeynes@644 | 235 | * Once we've decided that there's a real sector at the requested lba, there's
|
nkeynes@644 | 236 | * really two things we need to care about:
|
nkeynes@644 | 237 | * 1. Is the sector mode compatible with the requested read mode
|
nkeynes@644 | 238 | * 2. Which parts of the sector do we need to return?
|
nkeynes@644 | 239 | * (header/subhead/data/raw sector)
|
nkeynes@644 | 240 | *
|
nkeynes@644 | 241 | * Also note that the disc image may supply us with just the data (most common
|
nkeynes@644 | 242 | * case), or may have the full raw sector. In the former case we may need to
|
nkeynes@644 | 243 | * generate the missing data on the fly, for which we use libedc to compute the
|
nkeynes@644 | 244 | * data correction codes.
|
nkeynes@644 | 245 | */
|
nkeynes@342 | 246 | static gdrom_error_t gdrom_image_read_sector( gdrom_disc_t disc, uint32_t lba,
|
nkeynes@736 | 247 | int mode, unsigned char *buf, uint32_t *length )
|
nkeynes@342 | 248 | {
|
nkeynes@342 | 249 | gdrom_image_t image = (gdrom_image_t)disc;
|
nkeynes@498 | 250 | struct cdrom_sector_header secthead;
|
nkeynes@422 | 251 | int file_offset, read_len, track_no;
|
nkeynes@498 | 252 |
|
nkeynes@492 | 253 | FILE *f;
|
nkeynes@342 | 254 |
|
nkeynes@342 | 255 | track_no = gdrom_image_get_track_by_lba( image, lba );
|
nkeynes@342 | 256 | if( track_no == -1 ) {
|
nkeynes@736 | 257 | return PKT_ERR_BADREAD;
|
nkeynes@342 | 258 | }
|
nkeynes@342 | 259 | struct gdrom_track *track = &image->track[track_no-1];
|
nkeynes@342 | 260 | file_offset = track->offset + track->sector_size * (lba - track->lba);
|
nkeynes@342 | 261 | read_len = track->sector_size;
|
nkeynes@492 | 262 | if( track->file != NULL ) {
|
nkeynes@736 | 263 | f = track->file;
|
nkeynes@492 | 264 | } else {
|
nkeynes@736 | 265 | f = image->file;
|
nkeynes@492 | 266 | }
|
nkeynes@492 | 267 |
|
nkeynes@644 | 268 | /* First figure out what the real sector mode is for raw/semiraw sectors */
|
nkeynes@644 | 269 | int sector_mode;
|
nkeynes@644 | 270 | switch( track->mode ) {
|
nkeynes@644 | 271 | case GDROM_RAW_NONXA:
|
nkeynes@736 | 272 | gdrom_read_block( (unsigned char *)(§head), file_offset, sizeof(secthead), f );
|
nkeynes@736 | 273 | sector_mode = (secthead.mode == 1) ? GDROM_MODE1 : GDROM_MODE2_FORMLESS;
|
nkeynes@736 | 274 | break;
|
nkeynes@644 | 275 | case GDROM_RAW_XA:
|
nkeynes@736 | 276 | gdrom_read_block( (unsigned char *)(§head), file_offset, sizeof(secthead), f );
|
nkeynes@736 | 277 | if( secthead.mode == 1 ) {
|
nkeynes@736 | 278 | sector_mode = GDROM_MODE1;
|
nkeynes@736 | 279 | } else {
|
nkeynes@736 | 280 | sector_mode = ((secthead.subhead[2] & 0x20) == 0 ) ? GDROM_MODE2_FORM1 : GDROM_MODE2_FORM2;
|
nkeynes@736 | 281 | }
|
nkeynes@736 | 282 | break;
|
nkeynes@644 | 283 | case GDROM_SEMIRAW_MODE2:
|
nkeynes@736 | 284 | gdrom_read_block( secthead.subhead, file_offset, 8, f );
|
nkeynes@736 | 285 | sector_mode = ((secthead.subhead[2] & 0x20) == 0 ) ? GDROM_MODE2_FORM1 : GDROM_MODE2_FORM2;
|
nkeynes@736 | 286 | break;
|
nkeynes@342 | 287 | default:
|
nkeynes@736 | 288 | /* In the other cases, the track mode completely defines the sector mode */
|
nkeynes@736 | 289 | sector_mode = track->mode;
|
nkeynes@736 | 290 | break;
|
nkeynes@644 | 291 | }
|
nkeynes@644 | 292 |
|
nkeynes@644 | 293 | if( !gdrom_is_compatible_read_mode(sector_mode, READ_CD_MODE(mode)) ) {
|
nkeynes@736 | 294 | return PKT_ERR_BADREADMODE;
|
nkeynes@342 | 295 | }
|
nkeynes@644 | 296 |
|
nkeynes@644 | 297 | /* Ok, we've got a valid sector, check what parts of the sector we need to
|
nkeynes@644 | 298 | * return - header | subhead | data | everything
|
nkeynes@644 | 299 | */
|
nkeynes@644 | 300 | int channels = READ_CD_CHANNELS(mode);
|
nkeynes@644 | 301 |
|
nkeynes@644 | 302 | if( channels == 0 ) {
|
nkeynes@736 | 303 | // legal, if weird
|
nkeynes@736 | 304 | *length = 0;
|
nkeynes@736 | 305 | return PKT_ERR_OK;
|
nkeynes@644 | 306 | } else if( channels == 0xA0 &&
|
nkeynes@736 | 307 | (sector_mode == GDROM_MODE2_FORM1 || sector_mode == GDROM_MODE2_FORM2 )) {
|
nkeynes@736 | 308 | // caller requested a non-contiguous region
|
nkeynes@736 | 309 | return PKT_ERR_BADFIELD;
|
nkeynes@644 | 310 | } else if( READ_CD_RAW(channels) ) {
|
nkeynes@736 | 311 | channels = 0xF0; // implies everything
|
nkeynes@644 | 312 | }
|
nkeynes@644 | 313 |
|
nkeynes@644 | 314 | read_len = 0;
|
nkeynes@644 | 315 | int start, size;
|
nkeynes@644 | 316 | switch( track->mode ) {
|
nkeynes@644 | 317 | case GDROM_CDDA:
|
nkeynes@736 | 318 | // audio is nice and simple (assume perfect reads for now)
|
nkeynes@736 | 319 | *length = 2352;
|
nkeynes@736 | 320 | gdrom_read_block( buf, file_offset, track->sector_size, f );
|
nkeynes@736 | 321 | return PKT_ERR_OK;
|
nkeynes@644 | 322 | case GDROM_RAW_XA:
|
nkeynes@644 | 323 | case GDROM_RAW_NONXA:
|
nkeynes@736 | 324 | gdrom_get_read_bounds( sector_mode, channels, &start, &size );
|
nkeynes@736 | 325 | gdrom_read_block( buf, file_offset+start, size, f );
|
nkeynes@736 | 326 | read_len = size;
|
nkeynes@736 | 327 | break;
|
nkeynes@644 | 328 | case GDROM_SEMIRAW_MODE2:
|
nkeynes@736 | 329 | gdrom_get_read_bounds( sector_mode, channels, &start, &size );
|
nkeynes@736 | 330 | if( READ_CD_HEADER(channels) ) {
|
nkeynes@736 | 331 | gdrom_build_sector_header( buf, lba, sector_mode );
|
nkeynes@736 | 332 | read_len += SECTOR_HEADER_SIZE;
|
nkeynes@736 | 333 | size -= SECTOR_HEADER_SIZE;
|
nkeynes@736 | 334 | } else {
|
nkeynes@736 | 335 | start -= SECTOR_HEADER_SIZE;
|
nkeynes@736 | 336 | }
|
nkeynes@736 | 337 | gdrom_read_block( buf + read_len, file_offset+start, size, f );
|
nkeynes@736 | 338 | read_len += size;
|
nkeynes@736 | 339 | break;
|
nkeynes@644 | 340 | default: // Data track w/ data only in file
|
nkeynes@736 | 341 | if( READ_CD_RAW(channels) ) {
|
nkeynes@736 | 342 | gdrom_read_block( buf + gdrom_data_offset[track->mode], file_offset,
|
nkeynes@736 | 343 | track->sector_size, f );
|
nkeynes@736 | 344 | do_encode_L2( buf, sector_mode, lba );
|
nkeynes@736 | 345 | read_len = 2352;
|
nkeynes@736 | 346 | } else {
|
nkeynes@736 | 347 | if( READ_CD_HEADER(channels) ) {
|
nkeynes@736 | 348 | gdrom_build_sector_header( buf, lba, sector_mode );
|
nkeynes@736 | 349 | read_len += SECTOR_HEADER_SIZE;
|
nkeynes@736 | 350 | }
|
nkeynes@736 | 351 | if( READ_CD_SUBHEAD(channels) &&
|
nkeynes@736 | 352 | (sector_mode == GDROM_MODE2_FORM1 || sector_mode == GDROM_MODE2_FORM2) ) {
|
nkeynes@736 | 353 | if( sector_mode == GDROM_MODE2_FORM1 ) {
|
nkeynes@736 | 354 | *((uint32_t *)(buf+read_len)) = 0;
|
nkeynes@736 | 355 | *((uint32_t *)(buf+read_len+4)) = 0;
|
nkeynes@736 | 356 | } else {
|
nkeynes@736 | 357 | *((uint32_t *)(buf+read_len)) = 0x00200000;
|
nkeynes@736 | 358 | *((uint32_t *)(buf+read_len+4)) = 0x00200000;
|
nkeynes@736 | 359 | }
|
nkeynes@736 | 360 | read_len += 8;
|
nkeynes@736 | 361 | }
|
nkeynes@736 | 362 | if( READ_CD_DATA(channels) ) {
|
nkeynes@736 | 363 | gdrom_read_block( buf+read_len, file_offset, track->sector_size, f );
|
nkeynes@736 | 364 | read_len += track->sector_size;
|
nkeynes@736 | 365 | }
|
nkeynes@736 | 366 | }
|
nkeynes@644 | 367 | }
|
nkeynes@342 | 368 | *length = read_len;
|
nkeynes@342 | 369 | return PKT_ERR_OK;
|
nkeynes@342 | 370 | }
|
nkeynes@342 | 371 |
|
nkeynes@422 | 372 | static gdrom_error_t gdrom_image_read_toc( gdrom_disc_t disc, unsigned char *buf )
|
nkeynes@342 | 373 | {
|
nkeynes@342 | 374 | gdrom_image_t image = (gdrom_image_t)disc;
|
nkeynes@342 | 375 | struct gdrom_toc *toc = (struct gdrom_toc *)buf;
|
nkeynes@342 | 376 | int i;
|
nkeynes@342 | 377 |
|
nkeynes@342 | 378 | for( i=0; i<image->track_count; i++ ) {
|
nkeynes@736 | 379 | toc->track[i] = htonl( image->track[i].lba ) | image->track[i].flags;
|
nkeynes@342 | 380 | }
|
nkeynes@342 | 381 | toc->first = 0x0100 | image->track[0].flags;
|
nkeynes@342 | 382 | toc->last = (image->track_count<<8) | image->track[i-1].flags;
|
nkeynes@342 | 383 | toc->leadout = htonl(image->track[i-1].lba + image->track[i-1].sector_count) |
|
nkeynes@736 | 384 | image->track[i-1].flags;
|
nkeynes@342 | 385 | for( ;i<99; i++ )
|
nkeynes@736 | 386 | toc->track[i] = 0xFFFFFFFF;
|
nkeynes@342 | 387 | return PKT_ERR_OK;
|
nkeynes@342 | 388 | }
|
nkeynes@342 | 389 |
|
nkeynes@422 | 390 | static gdrom_error_t gdrom_image_read_session( gdrom_disc_t disc, int session, unsigned char *buf )
|
nkeynes@342 | 391 | {
|
nkeynes@342 | 392 | gdrom_image_t image = (gdrom_image_t)disc;
|
nkeynes@342 | 393 | struct gdrom_track *last_track = &image->track[image->track_count-1];
|
nkeynes@342 | 394 | unsigned int end_of_disc = last_track->lba + last_track->sector_count;
|
nkeynes@342 | 395 | int i;
|
nkeynes@342 | 396 | buf[0] = 0x01; /* Disc status? */
|
nkeynes@342 | 397 | buf[1] = 0;
|
nkeynes@342 | 398 |
|
nkeynes@342 | 399 | if( session == 0 ) {
|
nkeynes@736 | 400 | buf[2] = last_track->session+1; /* last session */
|
nkeynes@736 | 401 | buf[3] = (end_of_disc >> 16) & 0xFF;
|
nkeynes@736 | 402 | buf[4] = (end_of_disc >> 8) & 0xFF;
|
nkeynes@736 | 403 | buf[5] = end_of_disc & 0xFF;
|
nkeynes@736 | 404 | return PKT_ERR_OK;
|
nkeynes@342 | 405 | } else {
|
nkeynes@736 | 406 | session--;
|
nkeynes@736 | 407 | for( i=0; i<image->track_count; i++ ) {
|
nkeynes@736 | 408 | if( image->track[i].session == session ) {
|
nkeynes@736 | 409 | buf[2] = i+1; /* first track of session */
|
nkeynes@736 | 410 | buf[3] = (image->track[i].lba >> 16) & 0xFF;
|
nkeynes@736 | 411 | buf[4] = (image->track[i].lba >> 8) & 0xFF;
|
nkeynes@736 | 412 | buf[5] = image->track[i].lba & 0xFF;
|
nkeynes@736 | 413 | return PKT_ERR_OK;
|
nkeynes@736 | 414 | }
|
nkeynes@736 | 415 | }
|
nkeynes@736 | 416 | return PKT_ERR_BADFIELD; /* No such session */
|
nkeynes@342 | 417 | }
|
nkeynes@342 | 418 | }
|
nkeynes@342 | 419 |
|
nkeynes@422 | 420 | static gdrom_error_t gdrom_image_read_position( gdrom_disc_t disc, uint32_t lba, unsigned char *buf )
|
nkeynes@342 | 421 | {
|
nkeynes@342 | 422 | gdrom_image_t image = (gdrom_image_t)disc;
|
nkeynes@342 | 423 | int track_no = gdrom_image_get_track_by_lba( image, lba );
|
nkeynes@342 | 424 | if( track_no == -1 ) {
|
nkeynes@736 | 425 | track_no = 1;
|
nkeynes@736 | 426 | lba = 150;
|
nkeynes@342 | 427 | }
|
nkeynes@342 | 428 | struct gdrom_track *track = &image->track[track_no-1];
|
nkeynes@342 | 429 | uint32_t offset = lba - track->lba;
|
nkeynes@342 | 430 | buf[4] = track->flags;
|
nkeynes@342 | 431 | buf[5] = track_no;
|
nkeynes@342 | 432 | buf[6] = 0x01; /* ?? */
|
nkeynes@342 | 433 | buf[7] = (offset >> 16) & 0xFF;
|
nkeynes@342 | 434 | buf[8] = (offset >> 8) & 0xFF;
|
nkeynes@342 | 435 | buf[9] = offset & 0xFF;
|
nkeynes@342 | 436 | buf[10] = 0;
|
nkeynes@342 | 437 | buf[11] = (lba >> 16) & 0xFF;
|
nkeynes@342 | 438 | buf[12] = (lba >> 8) & 0xFF;
|
nkeynes@342 | 439 | buf[13] = lba & 0xFF;
|
nkeynes@422 | 440 | return PKT_ERR_OK;
|
nkeynes@342 | 441 | }
|
nkeynes@342 | 442 |
|
nkeynes@342 | 443 | static int gdrom_image_drive_status( gdrom_disc_t disc )
|
nkeynes@342 | 444 | {
|
nkeynes@342 | 445 | gdrom_image_t image = (gdrom_image_t)disc;
|
nkeynes@720 | 446 | if( image->disc_type == IDE_DISC_NONE ) {
|
nkeynes@720 | 447 | return IDE_DISC_NONE;
|
nkeynes@720 | 448 | } else {
|
nkeynes@720 | 449 | return image->disc_type | IDE_DISC_READY;
|
nkeynes@720 | 450 | }
|
nkeynes@342 | 451 | }
|
nkeynes@342 | 452 |
|
nkeynes@342 | 453 | void gdrom_image_dump_info( gdrom_disc_t d ) {
|
nkeynes@342 | 454 | gdrom_image_t disc = (gdrom_image_t)d;
|
nkeynes@342 | 455 | int i;
|
nkeynes@342 | 456 | int last_session = disc->track[disc->track_count-1].session;
|
nkeynes@342 | 457 | gboolean is_bootable = FALSE;
|
nkeynes@342 | 458 |
|
nkeynes@342 | 459 | INFO( "Disc ID: %s, %d tracks in %d sessions", disc->mcn, disc->track_count,
|
nkeynes@736 | 460 | disc->track[disc->track_count-1].session + 1 );
|
nkeynes@342 | 461 | if( last_session > 0 ) {
|
nkeynes@736 | 462 | /* Boot track is the first data track of the last session, provided that it
|
nkeynes@736 | 463 | * cannot be a single-session disc.
|
nkeynes@736 | 464 | */
|
nkeynes@736 | 465 | int boot_track = -1;
|
nkeynes@736 | 466 | for( i=disc->track_count-1; i>=0 && disc->track[i].session == last_session; i-- ) {
|
nkeynes@736 | 467 | if( disc->track[i].flags & TRACK_DATA ) {
|
nkeynes@736 | 468 | boot_track = i;
|
nkeynes@736 | 469 | }
|
nkeynes@736 | 470 | }
|
nkeynes@736 | 471 | if( boot_track != -1 ) {
|
nkeynes@736 | 472 | unsigned char boot_sector[MAX_SECTOR_SIZE];
|
nkeynes@736 | 473 | uint32_t length = sizeof(boot_sector);
|
nkeynes@736 | 474 | if( d->read_sector( d, disc->track[boot_track].lba, 0x28,
|
nkeynes@736 | 475 | boot_sector, &length ) == PKT_ERR_OK ) {
|
nkeynes@736 | 476 | bootstrap_dump(boot_sector, FALSE);
|
nkeynes@736 | 477 | is_bootable = TRUE;
|
nkeynes@736 | 478 | }
|
nkeynes@736 | 479 | }
|
nkeynes@342 | 480 | }
|
nkeynes@342 | 481 | if( !is_bootable ) {
|
nkeynes@736 | 482 | WARN( "Disc does not appear to be bootable" );
|
nkeynes@342 | 483 | }
|
nkeynes@342 | 484 | }
|
nkeynes@342 | 485 |
|
nkeynes@709 | 486 | gdrom_device_t gdrom_device_new( const gchar *name, const gchar *dev_name )
|
nkeynes@709 | 487 | {
|
nkeynes@709 | 488 | struct gdrom_device *dev = g_malloc0( sizeof(struct gdrom_device) );
|
nkeynes@709 | 489 | dev->name = g_strdup(name);
|
nkeynes@709 | 490 | dev->device_name = g_strdup(dev_name);
|
nkeynes@709 | 491 | return dev;
|
nkeynes@709 | 492 | }
|
nkeynes@709 | 493 |
|
nkeynes@709 | 494 | void gdrom_device_destroy( gdrom_device_t dev )
|
nkeynes@709 | 495 | {
|
nkeynes@709 | 496 | if( dev->name != NULL ) {
|
nkeynes@709 | 497 | g_free( dev->name );
|
nkeynes@709 | 498 | dev->name = NULL;
|
nkeynes@709 | 499 | }
|
nkeynes@709 | 500 | if( dev->device_name != NULL ) {
|
nkeynes@709 | 501 | g_free( dev->device_name );
|
nkeynes@709 | 502 | dev->device_name = NULL;
|
nkeynes@709 | 503 | }
|
nkeynes@709 | 504 | g_free( dev );
|
nkeynes@709 | 505 | }
|