lxdream.org :: lxdream/src/gdrom/gdrom.c r342:850502f0e8de

tree revision 351:41b7e55ee10f

filename	src/gdrom/gdrom.c
changeset	342:850502f0e8de
prev	245:a1d0655a88d3
next	422:61a0598e07ff
author	nkeynes
date	Tue Feb 06 07:59:06 2007 +0000 (17 years ago)
permissions	-rw-r--r--
last change	Fix debug output of polygons with modifier volume

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     2 /**

     3  * $Id: gdrom.c,v 1.12 2007-01-31 10:58:42 nkeynes Exp $

     4  *

     5  * GD-Rom  access functions.

     6  *

     7  * Copyright (c) 2005 Nathan Keynes.

     8  *

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

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

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

    12  * (at your option) any later version.

    13  *

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

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

    16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    17  * GNU General Public License for more details.

    18  */

    20 #include <stdio.h>

    21 #include <fcntl.h>

    22 #include <errno.h>

    23 #include "gdrom/ide.h"

    24 #include "gdrom/gdrom.h"

    25 #include "gdrom/packet.h"

    26 #include "dream.h"

    28 extern gdrom_disc_t gdrom_disc;

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

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

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

    35 gdrom_disc_t gdrom_image_open( const gchar *filename )

    36 {

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

    38     gdrom_disc_t disc = NULL;

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

    41     FILE *f;

    42     int i,j;

    43     gdrom_image_class_t extclz = NULL;

    45     if( fd == -1 ) {

    46 	ERROR("Unable to open file '%s': %s", filename, strerror(errno));

    47 	return NULL;

    48     }

    50     f = fdopen(fd, "ro");

    53     /* try extensions */

    54     if( ext != NULL ) {

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

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

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

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

    59 		extclz = gdrom_image_classes[i];

    60 		if( extclz->is_valid_file(f) ) {

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

    62 		    if( disc != NULL )

    63 			return disc;

    64 		}

    65 		break;

    66 	    }

    67 	}

    68     }

    70     /* Okay, fall back to magic */

    71     gboolean recognized = FALSE;

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

    73 	if( gdrom_image_classes[i] != extclz &&

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

    75 	    recognized = TRUE;

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

    77 	    if( disc != NULL )

    78 		return disc;

    79 	}

    80     }

    82     if( !recognized ) {

    83 	ERROR( "Unable to open disc %s: Unsupported format", filename );

    84     }

    85     fclose(f);

    86     return NULL;

    87 }

    89 void gdrom_mount_disc( gdrom_disc_t disc )

    90 {

    91     gdrom_unmount_disc();

    92     gdrom_disc = disc;

    93     gdrom_image_dump_info( disc );

    94 }

    96 gdrom_disc_t gdrom_mount_image( const gchar *filename )

    97 {

    98     gdrom_disc_t disc = gdrom_image_open(filename);

    99     if( disc != NULL )

   100 	gdrom_mount_disc( disc );

   101     return disc;

   102 }

   104 void gdrom_unmount_disc( )

   105 {

   106     if( gdrom_disc != NULL ) {

   107 	gdrom_disc->close(gdrom_disc);

   108     }

   109     gdrom_disc = NULL;

   111 }