/**

 * $Id: gdrom.c,v 1.17 2007-10-27 05:44:54 nkeynes Exp $

 *

 * GD-Rom  access functions.

 *

 * Copyright (c) 2005 Nathan Keynes.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

#include <stdio.h>

#include <fcntl.h>

#include <errno.h>

#include "gdrom/ide.h"

#include "gdrom/gdrom.h"

#include "gdrom/packet.h"

#include "dream.h"

extern gdrom_disc_t gdrom_disc;

gdrom_image_class_t gdrom_image_classes[] = { &linux_device_class, &nrg_image_class, &cdi_image_class, NULL };

char *gdrom_mode_names[] = { "Mode1", "Mode2", "XA 1", "XA2", "Audio", "GD-Rom" };

uint32_t gdrom_sector_size[] = { 2048, 2336, 2048, 2324, 2352, 2336 };

gdrom_disc_t gdrom_image_open( const gchar *filename )

{

    const gchar *ext = strrchr(filename, '.');

    gdrom_disc_t disc = NULL;

    int fd = open( filename, O_RDONLY | O_NONBLOCK );

    FILE *f;

    int i;

    gdrom_image_class_t extclz = NULL;

    if( fd == -1 ) {

	return NULL;

    }

    f = fdopen(fd, "ro");

    /* try extensions */

    if( ext != NULL ) {

	ext++; /* Skip the '.' */

	for( i=0; gdrom_image_classes[i] != NULL; i++ ) {

	    if( gdrom_image_classes[i]->extension != NULL &&

		strcasecmp( gdrom_image_classes[i]->extension, ext ) == 0 ) {

		extclz = gdrom_image_classes[i];

		if( extclz->is_valid_file(f) ) {

		    disc = extclz->open_image_file(filename, f);

		    if( disc != NULL )

			return disc;

		}

		break;

	    }

	}

    }

    /* Okay, fall back to magic */

    gboolean recognized = FALSE;

    for( i=0; gdrom_image_classes[i] != NULL; i++ ) {

	if( gdrom_image_classes[i] != extclz &&

	    gdrom_image_classes[i]->is_valid_file(f) ) {

	    recognized = TRUE;

	    disc = gdrom_image_classes[i]->open_image_file(filename, f);

	    if( disc != NULL )

		return disc;

	}

    }

    fclose(f);

    return NULL;

}

void gdrom_mount_disc( gdrom_disc_t disc ) 

{

    gdrom_unmount_disc();

    gdrom_disc = disc;

    gdrom_image_dump_info( disc );

}

gboolean gdrom_mount_image( const gchar *filename )

{

    gdrom_disc_t disc = gdrom_image_open(filename);

    if( disc != NULL ) {

	gdrom_mount_disc( disc );

	return TRUE;

    }

    return FALSE;

}

void gdrom_unmount_disc( ) 

{

    if( gdrom_disc != NULL ) {

	gdrom_disc->close(gdrom_disc);

    }

    gdrom_disc = NULL;

}

gdrom_disc_t gdrom_get_current_disc()

{

    return gdrom_disc;

}