nkeynes@492: /**
nkeynes@561:  * $Id$
nkeynes@492:  *
nkeynes@492:  * NullDC GDI image format
nkeynes@492:  *
nkeynes@492:  * Copyright (c) 2005 Nathan Keynes.
nkeynes@492:  *
nkeynes@492:  * This program is free software; you can redistribute it and/or modify
nkeynes@492:  * it under the terms of the GNU General Public License as published by
nkeynes@492:  * the Free Software Foundation; either version 2 of the License, or
nkeynes@492:  * (at your option) any later version.
nkeynes@492:  *
nkeynes@492:  * This program is distributed in the hope that it will be useful,
nkeynes@492:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@492:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@492:  * GNU General Public License for more details.
nkeynes@492:  */
nkeynes@492: 
nkeynes@492: #include <stdlib.h>
nkeynes@492: #include <stdio.h>
nkeynes@492: #include <stdint.h>
nkeynes@759: #include <string.h>
nkeynes@492: #include <fcntl.h>
nkeynes@492: #include <errno.h>
nkeynes@492: #include <sys/stat.h>
nkeynes@1296: #include <glib.h>
nkeynes@1097: #include "drivers/cdrom/cdimpl.h"
nkeynes@492: 
nkeynes@492: 
nkeynes@492: static gboolean gdi_image_is_valid( FILE *f );
nkeynes@1097: static gboolean gdi_image_read_toc( cdrom_disc_t disc, ERROR *err );
nkeynes@492: 
nkeynes@1097: struct cdrom_disc_factory gdi_disc_factory = { "NullDC GD-Rom Image", "gdi",
nkeynes@1097:         gdi_image_is_valid, NULL, gdi_image_read_toc };
nkeynes@492: 
nkeynes@492: static gboolean gdi_image_is_valid( FILE *f )
nkeynes@492: {
nkeynes@492:     char line[512];
nkeynes@492:     uint32_t track_count;
nkeynes@736: 
nkeynes@492:     fseek(f, 0, SEEK_SET);
nkeynes@492:     if( fgets( line, sizeof(line), f ) == NULL ) {
nkeynes@736:         return FALSE;
nkeynes@492:     }
nkeynes@492:     track_count = strtoul(line, NULL, 0);
nkeynes@492:     if( track_count == 0 || track_count > 99 ) {
nkeynes@736:         return FALSE;
nkeynes@492:     }
nkeynes@492:     return TRUE;
nkeynes@492: }
nkeynes@492: 
nkeynes@1097: static gboolean gdi_image_read_toc( cdrom_disc_t disc, ERROR *err )
nkeynes@492: {
nkeynes@492:     int i;
nkeynes@492:     uint32_t track_count;
nkeynes@492:     char line[512];
nkeynes@1097:     int session = 1;
nkeynes@492:     gchar *dirname;
nkeynes@492: 
nkeynes@1097:     FILE *f = cdrom_disc_get_base_file(disc);
nkeynes@1097: 
nkeynes@492:     fseek(f, 0, SEEK_SET);
nkeynes@736: 
nkeynes@492:     if( fgets( line, sizeof(line), f ) == NULL ) {
nkeynes@1109:         SET_ERROR( err, LX_ERR_FILE_INVALID, "Invalid GDI image" );
nkeynes@736:         return FALSE;
nkeynes@492:     }
nkeynes@492:     track_count = strtoul(line, NULL, 0);
nkeynes@492:     if( track_count == 0 || track_count > 99 ) {
nkeynes@1109:         SET_ERROR( err, LX_ERR_FILE_INVALID, "Invalid GDI image" );
nkeynes@1097:         return FALSE;
nkeynes@492:     }
nkeynes@492: 
nkeynes@1097:     dirname = g_path_get_dirname(disc->name);
nkeynes@1097:     disc->disc_type = CDROM_DISC_GDROM;
nkeynes@1023:     disc->track_count = track_count;
nkeynes@1097:     disc->session_count = 2;
nkeynes@492:     for( i=0; i<track_count; i++ ) {
nkeynes@736:         int track_no, start_lba, flags, size, offset;
nkeynes@736:         char filename[256];
nkeynes@492: 
nkeynes@736:         if( fgets( line, sizeof(line), f ) == NULL ) {
nkeynes@1097:             cdrom_disc_unref(disc);
nkeynes@1109:             SET_ERROR( err, LX_ERR_FILE_INVALID, "Invalid GDI image - unexpected end of file" );
nkeynes@1097:             return FALSE;
nkeynes@736:         }
nkeynes@736:         sscanf( line, "%d %d %d %d %s %d", &track_no, &start_lba, &flags, &size,
nkeynes@736:                 filename, &offset );
nkeynes@736:         if( start_lba >= 45000 ) {
nkeynes@1097:             session = 2;
nkeynes@736:         }
nkeynes@1097:         disc->track[i].sessionno = session;
nkeynes@1097:         disc->track[i].lba = start_lba;
nkeynes@1023:         disc->track[i].flags = (flags & 0x0F)<<4;
nkeynes@1097: 
nkeynes@1097:         sector_mode_t mode;
nkeynes@1097:         if( disc->track[i].flags & TRACK_FLAG_DATA ) {
nkeynes@1097:             /* Data track */
nkeynes@1097:             switch(size) {
nkeynes@1097:             case 0:    mode = SECTOR_MODE2_FORM1; break; /* Default */
nkeynes@1097:             case 2048: mode = SECTOR_MODE2_FORM1; break;
nkeynes@1097:             case 2324: mode = SECTOR_MODE2_FORM2; break;
nkeynes@1097:             case 2336: mode = SECTOR_SEMIRAW_MODE2; break;
nkeynes@1097:             case 2352: mode = SECTOR_RAW_XA; break;
nkeynes@1097:             default:
nkeynes@1109:                 SET_ERROR( err, LX_ERR_FILE_INVALID, "Invalid sector size '%d' in GDI track %d", size, (i+1) );
nkeynes@1097:                 g_free(dirname);
nkeynes@1097:                 return FALSE;
nkeynes@1097:             }
nkeynes@1097:         } else {
nkeynes@1097:             /* Audio track */
nkeynes@1097:             mode = SECTOR_CDDA;
nkeynes@1097:             if( size == 0 )
nkeynes@1097:                 size = 2352;
nkeynes@1097:             else if( size != 2352 ) {
nkeynes@1109:                 SET_ERROR( err, LX_ERR_FILE_INVALID, "Invalid sector size '%d' for audio track %d", size, (i+1) );
nkeynes@1097:                 g_free(dirname);
nkeynes@1097:                 return FALSE;
nkeynes@1097:             }
nkeynes@1097:         }
nkeynes@736:         if( strcasecmp( filename, "none" ) == 0 ) {
nkeynes@1097:             disc->track[i].source = null_sector_source_new( mode, 0 );
nkeynes@736:         } else {
nkeynes@736:             gchar *pathname = g_strdup_printf( "%s%c%s", dirname, G_DIR_SEPARATOR, filename );
nkeynes@1097:             disc->track[i].source = file_sector_source_new_filename( pathname, mode,
nkeynes@1097:                     offset, FILE_SECTOR_FULL_FILE );
nkeynes@736:             g_free(pathname);
nkeynes@1097:             if( disc->track[i].source == NULL ) {
nkeynes@1109:                 /* Note: status is invalid because it's a failure of the GDI file */
nkeynes@1109:                 SET_ERROR( err, LX_ERR_FILE_INVALID, "GDI track file '%s' could not be opened (%s)", filename, strerror(errno) );
nkeynes@736:                 g_free(dirname);
nkeynes@1097:                 return FALSE;
nkeynes@736:             }
nkeynes@736:         }
nkeynes@492:     }
nkeynes@492:     g_free(dirname);
nkeynes@1097:     return TRUE;
nkeynes@492: }