Search
lxdream.org :: lxdream/src/gdrom/nrg.c
lxdream 0.9.1
released Jun 29
Download Now
filename src/gdrom/nrg.c
changeset 142:2f631c3a3946
prev138:afabd7e6d26d
next168:203a72138e16
author nkeynes
date Tue May 02 14:09:11 2006 +0000 (14 years ago)
permissions -rw-r--r--
last change Add packet.h
Implement read toc, request sense, test ready commands.
Fix failure to clear error status on new command
file annotate diff log raw
nkeynes@138
     1
/**
nkeynes@142
     2
 * $Id: nrg.c,v 1.2 2006-05-02 14:09:11 nkeynes Exp $
nkeynes@138
     3
 *
nkeynes@138
     4
 * Nero (NRG) CD file format. File information stolen shamelessly from
nkeynes@138
     5
 * libcdio.
nkeynes@138
     6
 *
nkeynes@138
     7
 * Copyright (c) 2005 Nathan Keynes.
nkeynes@138
     8
 *
nkeynes@138
     9
 * This program is free software; you can redistribute it and/or modify
nkeynes@138
    10
 * it under the terms of the GNU General Public License as published by
nkeynes@138
    11
 * the Free Software Foundation; either version 2 of the License, or
nkeynes@138
    12
 * (at your option) any later version.
nkeynes@138
    13
 *
nkeynes@138
    14
 * This program is distributed in the hope that it will be useful,
nkeynes@138
    15
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
nkeynes@138
    16
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
nkeynes@138
    17
 * GNU General Public License for more details.
nkeynes@138
    18
 */
nkeynes@138
    19
nkeynes@138
    20
#include <assert.h>
nkeynes@138
    21
#include <stdio.h>
nkeynes@138
    22
#include <errno.h>
nkeynes@138
    23
#include "gdrom/gdrom.h"
nkeynes@138
    24
#include "dream.h"
nkeynes@138
    25
nkeynes@138
    26
#define NERO_V55_ID  0x4e455235 
nkeynes@138
    27
#define NERO_V50_ID  0x4e45524f 
nkeynes@138
    28
nkeynes@138
    29
/* Courtesy of libcdio */
nkeynes@138
    30
/* 5.0 or earlier */
nkeynes@138
    31
#define NERO_ID  0x4e45524f  /* Nero pre 5.5.x */
nkeynes@138
    32
#define CUES_ID  0x43554553  /* Nero pre version 5.5.x-6.x */
nkeynes@138
    33
#define DAOI_ID  0x44414f49
nkeynes@138
    34
#define ETNF_ID  0x45544e46
nkeynes@138
    35
#define SINF_ID  0x53494e46  /* Session information */
nkeynes@138
    36
#define END_ID  0x454e4421
nkeynes@138
    37
/* 5.5+ only */
nkeynes@138
    38
#define NER5_ID  0x4e455235  /* Nero version 5.5.x */
nkeynes@138
    39
#define CDTX_ID  0x43445458  /* CD TEXT */
nkeynes@138
    40
#define CUEX_ID  0x43554558  /* Nero version 5.5.x-6.x */
nkeynes@138
    41
#define DAOX_ID  0x44414f58  /* Nero version 5.5.x-6.x */
nkeynes@138
    42
#define ETN2_ID  0x45544e32
nkeynes@138
    43
#define MTYP_ID  0x4d545950  /* Disc Media type? */
nkeynes@138
    44
nkeynes@138
    45
nkeynes@138
    46
union nrg_footer {
nkeynes@138
    47
    struct nrg_footer_v50 {
nkeynes@138
    48
	uint32_t dummy;
nkeynes@138
    49
	uint32_t id;
nkeynes@138
    50
	uint32_t offset;
nkeynes@138
    51
    } v50;
nkeynes@138
    52
    struct nrg_footer_v55 {
nkeynes@138
    53
	uint32_t id;
nkeynes@138
    54
	uint64_t offset;
nkeynes@138
    55
    } v55;
nkeynes@138
    56
};
nkeynes@138
    57
nkeynes@138
    58
struct nrg_chunk {
nkeynes@138
    59
    uint32_t id;
nkeynes@138
    60
    uint32_t length;
nkeynes@138
    61
};
nkeynes@138
    62
nkeynes@138
    63
struct nrg_etnf {
nkeynes@138
    64
    uint32_t offset;
nkeynes@138
    65
    uint32_t length;
nkeynes@138
    66
    uint32_t mode;
nkeynes@138
    67
    uint32_t lba;
nkeynes@138
    68
    uint32_t padding;
nkeynes@138
    69
};
nkeynes@138
    70
nkeynes@138
    71
struct nrg_cues {
nkeynes@138
    72
    uint8_t type;
nkeynes@138
    73
    uint8_t track;
nkeynes@138
    74
    uint8_t control;
nkeynes@138
    75
    uint8_t pad;
nkeynes@138
    76
    uint32_t addr;
nkeynes@138
    77
};
nkeynes@138
    78
nkeynes@138
    79
struct nrg_daoi {
nkeynes@138
    80
    uint32_t length;
nkeynes@138
    81
    char mcn[14];
nkeynes@138
    82
    uint8_t disc_mode;
nkeynes@138
    83
    uint8_t unknown[2]; /* always 01 01? */
nkeynes@138
    84
    uint8_t track_count;
nkeynes@138
    85
    struct nrg_daoi_track {
nkeynes@138
    86
	char unknown[10];
nkeynes@138
    87
	uint32_t sector_size __attribute__((packed)); /* Always 0? */
nkeynes@138
    88
	uint8_t mode;
nkeynes@138
    89
	uint8_t unknown2[3]; /* Always 00 00 01? */
nkeynes@138
    90
	uint32_t pregap __attribute__((packed));
nkeynes@138
    91
	uint32_t offset __attribute__((packed));
nkeynes@138
    92
	uint32_t end __attribute__((packed));
nkeynes@138
    93
    } track[0];
nkeynes@138
    94
} __attribute__((packed));
nkeynes@138
    95
nkeynes@138
    96
/**
nkeynes@138
    97
 * Convert an 8-bit BCD number to normal integer form. 
nkeynes@138
    98
 * Eg, 0x79 => 79
nkeynes@138
    99
 */
nkeynes@138
   100
uint8_t static bcd_to_uint8( uint8_t bcd )
nkeynes@138
   101
{
nkeynes@138
   102
    return (bcd & 0x0F) + (((bcd & 0xF0)>>4)*10);
nkeynes@138
   103
}
nkeynes@138
   104
nkeynes@138
   105
nkeynes@138
   106
/**
nkeynes@138
   107
 * Convert a 32 bit MSF address (BCD coded) to the
nkeynes@138
   108
 * equivalent LBA form. 
nkeynes@138
   109
 * Eg, 0x
nkeynes@138
   110
 */
nkeynes@138
   111
uint32_t static msf_to_lba( uint32_t msf )
nkeynes@138
   112
{
nkeynes@138
   113
    msf = ntohl(msf);
nkeynes@138
   114
    int f = bcd_to_uint8(msf);
nkeynes@138
   115
    int s = bcd_to_uint8(msf>>8);
nkeynes@138
   116
    int m = bcd_to_uint8(msf>>16);
nkeynes@138
   117
    return (m * 60 + s) * 75 + f;
nkeynes@138
   118
nkeynes@138
   119
}
nkeynes@138
   120
nkeynes@138
   121
uint32_t static nrg_track_mode( uint8_t mode )
nkeynes@138
   122
{
nkeynes@138
   123
    switch( mode ) {
nkeynes@138
   124
    case 0: return GDROM_MODE1;
nkeynes@138
   125
    case 2: return GDROM_MODE2_XA1;
nkeynes@138
   126
    case 3: return GDROM_MODE2;
nkeynes@138
   127
    case 7: return GDROM_CDDA;
nkeynes@138
   128
    default: 
nkeynes@138
   129
	ERROR( "Unrecognized track mode %d in Nero image", mode );
nkeynes@138
   130
	return -1;
nkeynes@138
   131
    }
nkeynes@138
   132
}
nkeynes@138
   133
nkeynes@138
   134
gdrom_disc_t nrg_image_open( const gchar *filename )
nkeynes@138
   135
{
nkeynes@138
   136
    FILE *f = fopen( filename, "ro" );
nkeynes@138
   137
    union nrg_footer footer;
nkeynes@138
   138
    struct nrg_chunk chunk;
nkeynes@138
   139
    struct nrg_daoi *dao;
nkeynes@138
   140
    gdrom_disc_t disc;
nkeynes@138
   141
    gboolean end = FALSE;
nkeynes@138
   142
    int session_id = 0;
nkeynes@138
   143
    int session_track_id = 0;
nkeynes@138
   144
    int track_id = 0;
nkeynes@138
   145
    int cue_track_id = 0, cue_track_count = 0;
nkeynes@138
   146
    int i;
nkeynes@138
   147
nkeynes@138
   148
    if( f == NULL ) {
nkeynes@138
   149
	ERROR( "Unable to open file '%s': %s", filename, strerror(errno) );
nkeynes@138
   150
	return NULL;
nkeynes@138
   151
    }
nkeynes@138
   152
    
nkeynes@138
   153
    fseek( f, -12, SEEK_END );
nkeynes@138
   154
    fread( &footer, sizeof(footer), 1, f );
nkeynes@138
   155
    if( ntohl(footer.v50.id) == NERO_V50_ID ) {
nkeynes@138
   156
	INFO( "Loading Nero 5.0 image" );
nkeynes@138
   157
	fseek( f, ntohl(footer.v50.offset), SEEK_SET );
nkeynes@138
   158
    } else if( ntohl(footer.v55.id) == NERO_V55_ID ) {
nkeynes@138
   159
	INFO( "Loading Nero 5.5+ image" );
nkeynes@138
   160
	fseek( f, ntohl(footer.v55.offset), SEEK_SET );
nkeynes@138
   161
    } else {
nkeynes@138
   162
	ERROR("Unable to understand file '%s' as a Nero image", filename );
nkeynes@138
   163
	return NULL;
nkeynes@138
   164
    }
nkeynes@138
   165
    
nkeynes@138
   166
    disc = gdrom_image_new(f);
nkeynes@138
   167
    if( disc == NULL ) {
nkeynes@138
   168
	ERROR("Unable to allocate memory!");
nkeynes@138
   169
	fclose(f);
nkeynes@138
   170
	return NULL;
nkeynes@138
   171
    }
nkeynes@138
   172
nkeynes@138
   173
    do {
nkeynes@138
   174
	fread( &chunk, sizeof(chunk), 1, f );
nkeynes@138
   175
	chunk.length = ntohl(chunk.length);
nkeynes@138
   176
	char data[chunk.length];
nkeynes@138
   177
	fread( data, chunk.length, 1, f );
nkeynes@138
   178
	switch( ntohl(chunk.id) ) {
nkeynes@138
   179
	case CUES_ID:
nkeynes@138
   180
	    cue_track_id = track_id;
nkeynes@138
   181
	    cue_track_count = ((chunk.length / sizeof(struct nrg_cues)) >> 1) - 1;
nkeynes@138
   182
	    track_id += cue_track_count;
nkeynes@138
   183
	    for( i=0; i<chunk.length; i+= sizeof(struct nrg_cues) ) {
nkeynes@138
   184
		struct nrg_cues *cue = (struct nrg_cues *)(data+i);
nkeynes@138
   185
		int track = 0;
nkeynes@138
   186
		if( cue->track == 0 )
nkeynes@138
   187
		    continue; /* Track 0. Leadin? always 0? */
nkeynes@138
   188
		if( cue->track == 0xAA ) { /* end of disc */
nkeynes@138
   189
		    disc->track[track_id-1].sector_count =
nkeynes@138
   190
			msf_to_lba( cue->addr ) - disc->track[track_id-1].lba;
nkeynes@138
   191
		} else {
nkeynes@138
   192
		    track = cue_track_id + bcd_to_uint8(cue->track) - 1;
nkeynes@138
   193
		    if( (cue->control & 0x01) == 0 ) { 
nkeynes@138
   194
			/* Pre-gap address. */
nkeynes@138
   195
			if( track != 0 ) {
nkeynes@138
   196
			    disc->track[track-1].sector_count = 
nkeynes@138
   197
				msf_to_lba( cue->addr ) - disc->track[track-1].lba;
nkeynes@138
   198
			}
nkeynes@138
   199
		    } else { /* Track-start address */
nkeynes@138
   200
			disc->track[track].lba = msf_to_lba( cue->addr );
nkeynes@142
   201
			disc->track[track].flags = cue->type;
nkeynes@138
   202
		    }
nkeynes@138
   203
		}
nkeynes@138
   204
	    }
nkeynes@138
   205
	    break;
nkeynes@138
   206
	case DAOI_ID:
nkeynes@138
   207
	    dao = (struct nrg_daoi *)data;
nkeynes@138
   208
	    memcpy( disc->mcn, dao->mcn, 13 );
nkeynes@138
   209
	    disc->mcn[13] = '\0';
nkeynes@138
   210
	    assert( dao->track_count * 30 + 22 == chunk.length );
nkeynes@138
   211
	    assert( dao->track_count == cue_track_count );
nkeynes@138
   212
	    for( i=0; i<dao->track_count; i++ ) {
nkeynes@138
   213
		disc->track[cue_track_id].sector_size = ntohl(dao->track[i].sector_size);
nkeynes@138
   214
		disc->track[cue_track_id].offset = ntohl(dao->track[i].offset);
nkeynes@138
   215
		disc->track[cue_track_id].mode = nrg_track_mode( dao->track[i].mode );
nkeynes@138
   216
		assert( disc->track[cue_track_id].sector_count == 
nkeynes@138
   217
			(ntohl(dao->track[i].end) - ntohl(dao->track[i].offset))/
nkeynes@138
   218
			ntohl(dao->track[i].sector_size) );
nkeynes@138
   219
		cue_track_id++;
nkeynes@138
   220
	    }
nkeynes@138
   221
	    break;
nkeynes@138
   222
	case SINF_ID: 
nkeynes@138
   223
	    /* Data is a single 32-bit number representing number of tracks in session */
nkeynes@138
   224
	    i = ntohl( *(uint32_t *)data );
nkeynes@138
   225
	    while( i-- > 0 )
nkeynes@138
   226
		disc->track[session_track_id++].session = session_id;
nkeynes@138
   227
	    session_id++;
nkeynes@138
   228
	    break;
nkeynes@138
   229
	case ETNF_ID:
nkeynes@138
   230
	    for( i=0; i < chunk.length; i+= 0x14 ) {
nkeynes@138
   231
		struct nrg_etnf *etnf = (struct nrg_etnf *)(data+i);
nkeynes@138
   232
		disc->track[track_id].offset = ntohl(etnf->offset);
nkeynes@138
   233
		disc->track[track_id].lba = ntohl(etnf->lba) + (i+1)*GDROM_PREGAP;
nkeynes@138
   234
		disc->track[track_id].mode = nrg_track_mode( ntohl(etnf->mode) );
nkeynes@138
   235
		if( disc->track[track_id].mode == -1 ) {
nkeynes@138
   236
		    disc->close(disc);
nkeynes@138
   237
		    return NULL;
nkeynes@138
   238
		}
nkeynes@142
   239
		if( disc->track[track_id].mode == GDROM_CDDA )
nkeynes@142
   240
		    disc->track[track_id].flags = 0x01;
nkeynes@142
   241
		else
nkeynes@142
   242
		    disc->track[track_id].flags = 0x01 | TRACK_DATA;
nkeynes@138
   243
		disc->track[track_id].sector_size = GDROM_SECTOR_SIZE(disc->track[track_id].mode);
nkeynes@138
   244
		disc->track[track_id].sector_count = ntohl(etnf->length) / 
nkeynes@138
   245
		    disc->track[track_id].sector_size;
nkeynes@138
   246
		track_id++;
nkeynes@138
   247
	    }
nkeynes@138
   248
	    break;
nkeynes@138
   249
	case END_ID:
nkeynes@138
   250
	    end = TRUE;
nkeynes@138
   251
	    break;
nkeynes@138
   252
	}
nkeynes@138
   253
    } while( !end );
nkeynes@138
   254
    disc->track_count = track_id;
nkeynes@138
   255
    return disc;
nkeynes@138
   256
}
nkeynes@138
   257
nkeynes@138
   258
gboolean nrg_read_sectors( struct gdrom_disc *disc, uint32_t lba, uint32_t count, char *buf )
nkeynes@138
   259
{
nkeynes@138
   260
    return FALSE;
nkeynes@138
   261
}
nkeynes@138
   262
.