/**
* Construct a disc around an IsoImage track (convenience function)
*/
cdrom_disc_t cdrom_disc_new_from_iso_image( cdrom_disc_type_t type, IsoImage *iso, cdrom_lba_t lba,
const char *bootstrap, ERROR *err )
{
sector_mode_t mode = (type == CDROM_DISC_NONXA ? SECTOR_MODE1 : SECTOR_MODE2_FORM1 );
sector_source_t source = iso_sector_source_new( iso, mode, lba, bootstrap, err );
if( source != NULL ) {
cdrom_disc_t disc = cdrom_disc_new_from_track(type, source, lba, err);
if( disc == NULL ) {
sector_source_unref( source );
} else {
return disc;
}
}
return NULL;
}
/**
* Create a new CDROM disc containing a single 1ST_READ.BIN.
* @param type The disc type - must be CDROM_DISC_GDROM or CDROM_DISC_XA
* @param bin The binary data (takes ownership)
* @param bin_size
*/
cdrom_disc_t cdrom_disc_new_wrapped_binary( cdrom_disc_type_t type, const gchar *filename, unsigned char *bin, size_t bin_size,
ERROR *err )
{
IsoImage *iso = NULL;
unsigned char *data = bin;
cdrom_lba_t start_lba = 45000; /* GDROM_START */
char bootstrap[32768];
/* 1. Load in the bootstrap: Note failures here are considered configuration errors */
gchar *bootstrap_file = lxdream_get_global_config_path_value(CONFIG_BOOTSTRAP);
if( bootstrap_file == NULL || bootstrap_file[0] == '\0' ) {
g_free(data);
SET_ERROR( err, LX_ERR_CONFIG, "Unable to create CD image: bootstrap file is not configured" );
return NULL;
}
FILE *f = fopen( bootstrap_file, "ro" );
if( f == NULL ) {
g_free(data);
SET_ERROR( err, LX_ERR_CONFIG, "Unable to create CD image: bootstrap file '%s' could not be opened", bootstrap_file );
return FALSE;
}
size_t len = fread( bootstrap, 1, 32768, f );
fclose(f);
if( len != 32768 ) {
g_free(data);
SET_ERROR( err, LX_ERR_CONFIG, "Unable to create CD image: bootstrap file '%s' is invalid", bootstrap_file );
return FALSE;
}
/* 2. Scramble the binary if necessary (and set type settings) */
if( type != CDROM_DISC_GDROM ) {
/* scramble the binary if we're going the MIL-CD route */
unsigned char *scramblebin = g_malloc(bin_size);
bootprogram_scramble( scramblebin, bin, bin_size );
data = scramblebin;
start_lba = 0x2DB6; /* CDROM_START (does it matter?) */
g_free(bin);
}
/* 3. Frob the bootstrap data */
dc_bootstrap_head_t boot_header = (dc_bootstrap_head_t)bootstrap;
memcpy( boot_header->boot_file, "1ST_READ.BIN ", 16 );
char tmp[129];
int name_len = snprintf( tmp, 129, "lxdream wrapped image: %s", filename );
if( name_len < 128 )
memset( tmp+name_len, ' ', 128-name_len );
memcpy( boot_header->product_name, tmp, 128 );
// bootstrap_update_crc(bootstrap);
/* 4. Build the ISO image */
int status = iso_image_new("autocd", &iso);
if( status != 1 ) {
g_free(data);
SET_ERROR( err, LX_ERR_NOMEM, "Unable to create CD image: out of memory" );
return NULL;
}
IsoStream *stream;
if( iso_mem_stream_new(data, bin_size, &stream) != 1 ) {
g_free(data);
iso_image_unref(iso);
SET_ERROR( err, LX_ERR_NOMEM, "Unable to create CD image: out of memory" );
return NULL;
}
iso_tree_add_new_file(iso_image_get_root(iso), "1ST_READ.BIN", stream, NULL);
sector_source_t track = iso_sector_source_new( iso, SECTOR_MODE2_FORM1, start_lba,
bootstrap, err );
if( track == NULL ) {
iso_image_unref(iso);
return NULL;
}
cdrom_disc_t disc = cdrom_disc_new_from_track( type, track, start_lba, err );
iso_image_unref(iso);
if( disc != NULL ) {
disc->name = g_strdup(filename);
}
return disc;
}
