1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/gdrom/gdi.c	Tue Nov 06 08:35:16 2007 +0000
     1.3 @@ -0,0 +1,127 @@
     1.4 +/**
     1.5 + * $Id: gdi.c,v 1.1 2007-11-06 08:35:16 nkeynes Exp $
     1.6 + *
     1.7 + * NullDC GDI image format
     1.8 + *
     1.9 + * Copyright (c) 2005 Nathan Keynes.
    1.10 + *
    1.11 + * This program is free software; you can redistribute it and/or modify
    1.12 + * it under the terms of the GNU General Public License as published by
    1.13 + * the Free Software Foundation; either version 2 of the License, or
    1.14 + * (at your option) any later version.
    1.15 + *
    1.16 + * This program is distributed in the hope that it will be useful,
    1.17 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.18 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.19 + * GNU General Public License for more details.
    1.20 + */
    1.21 +
    1.22 +#include <stdlib.h>
    1.23 +#include <stdio.h>
    1.24 +#include <stdint.h>
    1.25 +#include <fcntl.h>
    1.26 +#include <errno.h>
    1.27 +#include <sys/stat.h>
    1.28 +#include <glib/gutils.h>
    1.29 +#include "gdrom/gdrom.h"
    1.30 +
    1.31 +
    1.32 +static gboolean gdi_image_is_valid( FILE *f );
    1.33 +static gdrom_disc_t gdi_image_open( const gchar *filename, FILE *f );
    1.34 +
    1.35 +struct gdrom_image_class gdi_image_class = { "NullDC GD-Rom Image", "gdi", 
    1.36 +					     gdi_image_is_valid, gdi_image_open };
    1.37 +
    1.38 +static gboolean gdi_image_is_valid( FILE *f )
    1.39 +{
    1.40 +    char line[512];
    1.41 +    uint32_t track_count;
    1.42 +   
    1.43 +    fseek(f, 0, SEEK_SET);
    1.44 +    if( fgets( line, sizeof(line), f ) == NULL ) {
    1.45 +	return FALSE;
    1.46 +    }
    1.47 +    track_count = strtoul(line, NULL, 0);
    1.48 +    if( track_count == 0 || track_count > 99 ) {
    1.49 +	return FALSE;
    1.50 +    }
    1.51 +    return TRUE;
    1.52 +}
    1.53 +
    1.54 +static gdrom_disc_t gdi_image_open( const gchar *filename, FILE *f )
    1.55 +{
    1.56 +    int i;
    1.57 +    uint32_t track_count;
    1.58 +    gdrom_disc_t disc;
    1.59 +    gdrom_image_t image;
    1.60 +    struct stat st;
    1.61 +    char line[512];
    1.62 +    gchar *dirname;
    1.63 +
    1.64 +    fseek(f, 0, SEEK_SET);
    1.65 +    
    1.66 +    if( fgets( line, sizeof(line), f ) == NULL ) {
    1.67 +	return FALSE;
    1.68 +    }
    1.69 +    track_count = strtoul(line, NULL, 0);
    1.70 +    if( track_count == 0 || track_count > 99 ) {
    1.71 +	return NULL;
    1.72 +    }
    1.73 +
    1.74 +    disc = gdrom_image_new(filename, f);
    1.75 +    if( disc == NULL ) {
    1.76 +	ERROR("Unable to allocate memory!");
    1.77 +	return NULL;
    1.78 +    }
    1.79 +    dirname = g_path_get_dirname(filename);
    1.80 +    image = (gdrom_image_t)disc;
    1.81 +    image->disc_type = IDE_DISC_GDROM;
    1.82 +    image->track_count = track_count;
    1.83 +    for( i=0; i<track_count; i++ ) {
    1.84 +	int track_no, start_lba, flags, size, offset;
    1.85 +	char filename[256];
    1.86 +
    1.87 +	if( fgets( line, sizeof(line), f ) == NULL ) {
    1.88 +	    gdrom_image_destroy_no_close(disc);
    1.89 +	    return NULL;
    1.90 +	}
    1.91 +	sscanf( line, "%d %d %d %d %s %d", &track_no, &start_lba, &flags, &size,
    1.92 +		&filename, &offset );
    1.93 +	if( start_lba >= 45000 ) {
    1.94 +	    image->track[i].session = 1;
    1.95 +	} else {
    1.96 +	    image->track[i].session = 0;
    1.97 +	}
    1.98 +	image->track[i].lba = start_lba + 150; // 2-second offset
    1.99 +	image->track[i].flags = (flags & 0x0F)<<4;
   1.100 +	image->track[i].sector_size = size;
   1.101 +	if( strcasecmp( filename, "none" ) == 0 ) {
   1.102 +	    image->track[i].file = NULL;
   1.103 +	    image->track[i].sector_count = 0;
   1.104 +	    image->track[i].mode = GDROM_MODE1;
   1.105 +	} else {
   1.106 +	    gchar *pathname = g_strdup_printf( "%s%c%s", dirname, G_DIR_SEPARATOR, filename );
   1.107 +	    image->track[i].file = fopen( pathname, "ro" );
   1.108 +	    g_free(pathname);
   1.109 +	    if( image->track[i].file == NULL ) {
   1.110 +		gdrom_image_destroy_no_close(disc);
   1.111 +		g_free(dirname);
   1.112 +		return NULL;
   1.113 +	    }
   1.114 +	    fstat( fileno(image->track[i].file), &st );
   1.115 +	    image->track[i].sector_count = st.st_size / size;
   1.116 +	    switch(size) {
   1.117 +	    case 2048: image->track[i].mode = GDROM_MODE1; break;
   1.118 +	    case 2336: image->track[i].mode = GDROM_GD; break;
   1.119 +	    case 2352: image->track[i].mode = GDROM_CDDA; break;
   1.120 +	    default:
   1.121 +		gdrom_image_destroy_no_close(disc);
   1.122 +		g_free(dirname);
   1.123 +		return NULL;
   1.124 +	    }
   1.125 +	}
   1.126 +	image->track[i].offset = offset;
   1.127 +    }
   1.128 +    g_free(dirname);
   1.129 +    return disc;
   1.130 +}