1268 lines
34 KiB
C
1268 lines
34 KiB
C
/*
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$Id: nrg.c,v 1.22 2004/06/14 09:52:17 rocky Exp $
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Copyright (C) 2003, 2004 Rocky Bernstein <rocky@panix.com>
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Copyright (C) 2001, 2003 Herbert Valerio Riedel <hvr@gnu.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*! This code implements low-level access functions for the Nero native
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CD-image format residing inside a disk file (*.nrg).
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#ifdef HAVE_STDIO_H
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#include <stdio.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_GLOB_H
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#include <glob.h>
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#endif
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#include <cdio/logging.h>
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#include <cdio/sector.h>
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#include <cdio/util.h>
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#include "cdio_assert.h"
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#include "bytesex.h"
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#include "ds.h"
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#include "cdio_private.h"
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#include "_cdio_stdio.h"
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#include "nrg.h"
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static const char _rcsid[] = "$Id: nrg.c,v 1.22 2004/06/14 09:52:17 rocky Exp $";
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/* reader */
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#define DEFAULT_CDIO_DEVICE "image.nrg"
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typedef struct {
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int track_num; /* Probably is index+1 */
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msf_t start_msf;
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lba_t start_lba;
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int start_index;
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int sec_count; /* Number of sectors in track. Does not
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include pregap before next entry. */
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int flags; /* don't copy, 4 channel audio, pre emphasis */
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track_format_t track_format;
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bool track_green;
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uint16_t datasize; /* How much is in the portion we return back? */
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long int datastart; /* Offset from begining that data starts */
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uint16_t endsize; /* How much stuff at the end to skip over. This
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stuff may have error correction (EDC, or ECC).*/
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uint16_t blocksize; /* total block size = start + size + end */
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} track_info_t;
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/*
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Link element of track structure as a linked list.
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Possibly redundant with above track_info_t */
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typedef struct {
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uint32_t start_lsn;
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uint32_t sec_count; /* Number of sectors in track. Does not
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include pregap before next entry. */
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uint64_t img_offset; /* Bytes offset from beginning of disk image file.*/
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uint32_t blocksize; /* Number of bytes in a block */
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int flags; /* don't copy, 4 channel, pre-emphasis */
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} _mapping_t;
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typedef struct {
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/* Things common to all drivers like this.
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This must be first. */
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generic_img_private_t gen;
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internal_position_t pos;
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bool is_dao; /* True if some of disk at once. False
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if some sort of track at once. */
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uint32_t mtyp; /* Value of MTYP (media type?) tag */
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uint8_t dtyp; /* Value of DAOX media type tag */
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/* This is a hack because I don't really understnad NERO better. */
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bool is_cues;
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char *mcn; /* Media catalog number. */
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track_info_t tocent[100]; /* entry info for each track */
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track_t i_tracks; /* number of tracks in image */
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track_t i_first_track; /* track number of first track */
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CdioList *mapping; /* List of track information */
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uint32_t size;
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} _img_private_t;
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static bool parse_nrg (_img_private_t *env, const char *psz_nrg_name);
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static uint32_t _stat_size_nrg (void *user_data);
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#include "image_common.h"
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/* Updates internal track TOC, so we can later
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simulate ioctl(CDROMREADTOCENTRY).
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*/
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static void
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_register_mapping (_img_private_t *env, lsn_t start_lsn, uint32_t sec_count,
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uint64_t img_offset, uint32_t blocksize,
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track_format_t track_format, bool track_green,
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int flags)
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{
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const int track_num=env->i_tracks;
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track_info_t *this_track=&(env->tocent[env->i_tracks]);
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_mapping_t *_map = _cdio_malloc (sizeof (_mapping_t));
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_map->start_lsn = start_lsn;
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_map->sec_count = sec_count;
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_map->img_offset = img_offset;
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_map->blocksize = blocksize;
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_map->blocksize = flags;
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if (!env->mapping) env->mapping = _cdio_list_new ();
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_cdio_list_append (env->mapping, _map);
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env->size = MAX (env->size, (start_lsn + sec_count));
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/* Update *this_track and track_num. These structures are
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in a sense redundant witht the obj->mapping list. Perhaps one
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or the other can be eliminated.
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*/
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cdio_lba_to_msf (cdio_lsn_to_lba(start_lsn), &(this_track->start_msf));
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this_track->start_lba = cdio_msf_to_lba(&this_track->start_msf);
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this_track->track_num = track_num+1;
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this_track->blocksize = blocksize;
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if (env->is_cues)
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this_track->datastart = img_offset;
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else
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this_track->datastart = 0;
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if (track_green)
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this_track->datastart += CDIO_CD_SUBHEADER_SIZE;
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this_track->sec_count = sec_count;
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this_track->track_format= track_format;
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this_track->track_green = track_green;
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switch (this_track->track_format) {
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case TRACK_FORMAT_AUDIO:
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this_track->blocksize = CDIO_CD_FRAMESIZE_RAW;
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this_track->datasize = CDIO_CD_FRAMESIZE_RAW;
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/*this_track->datastart = 0;*/
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this_track->endsize = 0;
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break;
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case TRACK_FORMAT_CDI:
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this_track->datasize=CDIO_CD_FRAMESIZE;
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break;
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case TRACK_FORMAT_XA:
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if (track_green) {
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this_track->blocksize = CDIO_CD_FRAMESIZE;
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/*this_track->datastart = CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE;*/
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this_track->datasize = M2RAW_SECTOR_SIZE;
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this_track->endsize = 0;
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} else {
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/*this_track->datastart = CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE +
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CDIO_CD_SUBHEADER_SIZE;*/
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this_track->datasize = CDIO_CD_FRAMESIZE;
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this_track->endsize = CDIO_CD_SYNC_SIZE + CDIO_CD_ECC_SIZE;
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}
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break;
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case TRACK_FORMAT_DATA:
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if (track_green) {
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/*this_track->datastart = CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE;*/
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this_track->datasize = CDIO_CD_FRAMESIZE;
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this_track->endsize = CDIO_CD_EDC_SIZE + CDIO_CD_M1F1_ZERO_SIZE
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+ CDIO_CD_ECC_SIZE;
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} else {
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/* Is the below correct? */
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/*this_track->datastart = 0;*/
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this_track->datasize = CDIO_CD_FRAMESIZE;
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this_track->endsize = 0;
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}
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break;
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default:
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/*this_track->datasize=CDIO_CD_FRAMESIZE_RAW;*/
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cdio_warn ("track %d has unknown format %d",
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env->i_tracks, this_track->track_format);
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}
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env->i_tracks++;
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cdio_debug ("start lsn: %lu sector count: %0lu -> %8ld (%08lx)",
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(long unsigned int) start_lsn,
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(long unsigned int) sec_count,
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(long unsigned int) img_offset,
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(long unsigned int) img_offset);
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}
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/*
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Disk and track information for a Nero file are located at the end
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of the file. This routine extracts that information.
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FIXME: right now psz_nrg_name is not used. It will be in the future.
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*/
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static bool
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parse_nrg (_img_private_t *env, const char *psz_nrg_name)
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{
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long unsigned int footer_start;
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long unsigned int size;
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char *footer_buf = NULL;
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cdio_log_level_t log_level = (NULL == env) ? CDIO_LOG_INFO : CDIO_LOG_WARN;
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size = cdio_stream_stat (env->gen.data_source);
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if (-1 == size) return false;
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{
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_footer_t buf;
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cdio_assert (sizeof (buf) == 12);
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cdio_stream_seek (env->gen.data_source, size - sizeof (buf), SEEK_SET);
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cdio_stream_read (env->gen.data_source, (void *) &buf, sizeof (buf), 1);
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if (buf.v50.ID == UINT32_TO_BE (NERO_ID)) {
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cdio_info ("detected Nero version 5.0 (32-bit offsets) NRG magic");
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footer_start = uint32_to_be (buf.v50.footer_ofs);
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} else if (buf.v55.ID == UINT32_TO_BE (NER5_ID)) {
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cdio_info ("detected Nero version 5.5.x (64-bit offsets) NRG magic");
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footer_start = uint64_from_be (buf.v55.footer_ofs);
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} else {
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cdio_log (log_level, "Image not recognized as either version 5.0 or "
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"version 5.5.x type NRG");
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return false;
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}
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cdio_debug (".NRG footer start = %ld, length = %ld",
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(long) footer_start, (long) (size - footer_start));
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cdio_assert (IN ((size - footer_start), 0, 4096));
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footer_buf = _cdio_malloc (size - footer_start);
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cdio_stream_seek (env->gen.data_source, footer_start, SEEK_SET);
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cdio_stream_read (env->gen.data_source, footer_buf,
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size - footer_start, 1);
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}
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{
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int pos = 0;
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while (pos < size - footer_start) {
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_chunk_t *chunk = (void *) (footer_buf + pos);
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uint32_t opcode = UINT32_FROM_BE (chunk->id);
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bool break_out = false;
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switch (opcode) {
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case CUES_ID: /* "CUES" Seems to have sector size 2336 and 150 sector
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pregap seems to be included at beginning of image.
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*/
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case CUEX_ID: /* "CUEX" */
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{
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unsigned entries = UINT32_FROM_BE (chunk->len);
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_cuex_array_t *_entries = (void *) chunk->data;
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cdio_assert (env->mapping == NULL);
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cdio_assert ( sizeof (_cuex_array_t) == 8 );
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cdio_assert ( UINT32_FROM_BE (chunk->len) % sizeof(_cuex_array_t)
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== 0 );
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entries /= sizeof (_cuex_array_t);
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if (CUES_ID == opcode) {
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lsn_t lsn = UINT32_FROM_BE (_entries[0].lsn);
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int idx;
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cdio_info ("CUES type image detected" );
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/* CUES LSN has 150 pregap include at beginning? -/
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cdio_assert (lsn == 0?);
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*/
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env->is_cues = true; /* HACK alert. */
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env->i_tracks = 0;
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env->i_first_track = 1;
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for (idx = 1; idx < entries-1; idx += 2) {
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lsn_t sec_count;
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int addrtype = _entries[idx].addr_ctrl / 16;
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int control = _entries[idx].addr_ctrl % 16;
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int flags = 0;
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if ( 1 == control )
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flags &= ~CDIO_TRACK_FLAG_COPY_PERMITTED;
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cdio_assert (_entries[idx].track == _entries[idx + 1].track);
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/* lsn and sec_count*2 aren't correct, but it comes closer on the
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single example I have: svcdgs.nrg
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We are picking up the wrong fields and/or not interpreting
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them correctly.
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*/
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switch (addrtype) {
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case 0:
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lsn = UINT32_FROM_BE (_entries[idx].lsn);
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break;
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case 1:
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{
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#if 0
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msf_t msf = (msf_t) _entries[idx].lsn;
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lsn = cdio_msf_to_lsn(&msf);
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#else
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lsn = CDIO_INVALID_LSN;
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#endif
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cdio_warn ("untested (i.e. probably wrong) CUE MSF code");
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break;
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}
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default:
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lsn = CDIO_INVALID_LSN;
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cdio_warn("unknown addrtype %d", addrtype);
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}
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sec_count = UINT32_FROM_BE (_entries[idx + 1].lsn);
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_register_mapping (env, lsn, sec_count*2,
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(lsn+CDIO_PREGAP_SECTORS) * M2RAW_SECTOR_SIZE,
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M2RAW_SECTOR_SIZE, TRACK_FORMAT_XA, true,
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flags);
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}
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} else {
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lsn_t lsn = UINT32_FROM_BE (_entries[0].lsn);
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int idx;
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cdio_info ("CUEX type image detected");
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/* LSN must start at -150 (LBA 0)? */
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cdio_assert (lsn == -150);
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for (idx = 2; idx < entries; idx += 2) {
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lsn_t sec_count;
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int addrtype = _entries[idx].addr_ctrl >> 4;
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int control = _entries[idx].addr_ctrl & 0xf;
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int flags = 0;
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if ( 1 == control )
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flags &= ~CDIO_TRACK_FLAG_COPY_PERMITTED;
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/* extractnrg.pl has addrtype for LBA's 0, and
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for MSF 1. ???
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*/
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cdio_assert ( addrtype == 1);
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cdio_assert (_entries[idx].track != _entries[idx + 1].track);
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lsn = UINT32_FROM_BE (_entries[idx].lsn);
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sec_count = UINT32_FROM_BE (_entries[idx + 1].lsn);
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_register_mapping (env, lsn, sec_count - lsn,
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(lsn + CDIO_PREGAP_SECTORS)*M2RAW_SECTOR_SIZE,
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M2RAW_SECTOR_SIZE, TRACK_FORMAT_XA, true,
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flags);
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}
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}
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break;
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}
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case DAOX_ID: /* "DAOX" */
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case DAOI_ID: /* "DAOI" */
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{
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track_format_t track_format;
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int form2;
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env->mcn = _cdio_malloc (CDIO_MCN_SIZE);
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if (DAOX_ID == opcode) {
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_daox_array_t *_entries = (void *) chunk->data;
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form2 = _entries->_unknown[1];
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env->dtyp = _entries->_unknown[19];
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memcpy(env->mcn, &(_entries->mcn), CDIO_MCN_SIZE);
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} else {
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||
_daoi_array_t *_entries = (void *) chunk->data;
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||
form2 = _entries->_unknown[1];
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env->dtyp = _entries->_unknown[19];
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||
memcpy(env->mcn, &(_entries->mcn), CDIO_MCN_SIZE);
|
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}
|
||
|
||
env->is_dao = true;
|
||
cdio_debug ("DAO%c tag detected, track format %d, form %x\n",
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opcode==DAOX_ID ? 'X': 'I', env->dtyp, form2);
|
||
switch (env->dtyp) {
|
||
case 0:
|
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/* Mode 1 */
|
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track_format = TRACK_FORMAT_DATA;
|
||
break;
|
||
case 2:
|
||
/* Mode 2 form 1 */
|
||
form2 = 0;
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||
track_format = TRACK_FORMAT_XA;
|
||
break;
|
||
case 3:
|
||
/* Mode 2 */
|
||
track_format = TRACK_FORMAT_XA;
|
||
break;
|
||
case 0x6:
|
||
/* Mode2 form mix */
|
||
case 0x20:
|
||
track_format = TRACK_FORMAT_XA;
|
||
break;
|
||
case 0x7:
|
||
track_format = TRACK_FORMAT_AUDIO;
|
||
break;
|
||
default:
|
||
cdio_log (log_level, "Unknown track format %x\n",
|
||
env->dtyp);
|
||
track_format = TRACK_FORMAT_AUDIO;
|
||
}
|
||
if (0 == form2) {
|
||
int i;
|
||
for (i=0; i<env->i_tracks; i++) {
|
||
env->tocent[i].track_format= track_format;
|
||
env->tocent[i].datastart = 0;
|
||
env->tocent[i].track_green = false;
|
||
if (TRACK_FORMAT_AUDIO == track_format) {
|
||
env->tocent[i].blocksize = CDIO_CD_FRAMESIZE_RAW;
|
||
env->tocent[i].datasize = CDIO_CD_FRAMESIZE_RAW;
|
||
env->tocent[i].endsize = 0;
|
||
} else {
|
||
env->tocent[i].datasize = CDIO_CD_FRAMESIZE;
|
||
env->tocent[i].datastart = 0;
|
||
}
|
||
}
|
||
} else if (2 == form2) {
|
||
int i;
|
||
for (i=0; i<env->i_tracks; i++) {
|
||
env->tocent[i].track_green = true;
|
||
env->tocent[i].track_format= track_format;
|
||
env->tocent[i].datasize = CDIO_CD_FRAMESIZE;
|
||
if (TRACK_FORMAT_XA == track_format) {
|
||
env->tocent[i].datastart = CDIO_CD_SYNC_SIZE
|
||
+ CDIO_CD_HEADER_SIZE + CDIO_CD_SUBHEADER_SIZE;
|
||
env->tocent[i].endsize = CDIO_CD_SYNC_SIZE
|
||
+ CDIO_CD_ECC_SIZE;
|
||
} else {
|
||
env->tocent[i].datastart = CDIO_CD_SYNC_SIZE
|
||
+ CDIO_CD_HEADER_SIZE;
|
||
env->tocent[i].endsize = CDIO_CD_EDC_SIZE
|
||
+ CDIO_CD_M1F1_ZERO_SIZE + CDIO_CD_ECC_SIZE;
|
||
|
||
}
|
||
}
|
||
} else {
|
||
cdio_log (log_level, "Don't know if form1 or form2 form2: %x\n",
|
||
form2);
|
||
}
|
||
break;
|
||
}
|
||
case NERO_ID:
|
||
case NER5_ID:
|
||
cdio_error ("unexpected nrg magic ID NER%c detected",
|
||
opcode==NERO_ID ? 'O': '5');
|
||
free(footer_buf);
|
||
return false;
|
||
break;
|
||
|
||
case END1_ID: /* "END!" */
|
||
cdio_debug ("nrg end tag detected");
|
||
break_out = true;
|
||
break;
|
||
|
||
case ETNF_ID: /* "ETNF" */ {
|
||
unsigned entries = UINT32_FROM_BE (chunk->len);
|
||
_etnf_array_t *_entries = (void *) chunk->data;
|
||
|
||
cdio_assert (env->mapping == NULL);
|
||
|
||
cdio_assert ( sizeof (_etnf_array_t) == 20 );
|
||
cdio_assert ( UINT32_FROM_BE(chunk->len) % sizeof(_etnf_array_t)
|
||
== 0 );
|
||
|
||
entries /= sizeof (_etnf_array_t);
|
||
|
||
cdio_info ("SAO type image (ETNF) detected");
|
||
|
||
{
|
||
int idx;
|
||
for (idx = 0; idx < entries; idx++) {
|
||
uint32_t _len = UINT32_FROM_BE (_entries[idx].length);
|
||
uint32_t _start = UINT32_FROM_BE (_entries[idx].start_lsn);
|
||
uint32_t _start2 = UINT32_FROM_BE (_entries[idx].start);
|
||
uint32_t track_mode= uint32_from_be (_entries[idx].type);
|
||
bool track_green = true;
|
||
track_format_t track_format = TRACK_FORMAT_XA;
|
||
uint16_t blocksize;
|
||
|
||
switch (track_mode) {
|
||
case 0:
|
||
track_format = TRACK_FORMAT_DATA;
|
||
track_green = false; /* ?? */
|
||
blocksize = CDIO_CD_FRAMESIZE;
|
||
break;
|
||
case 2:
|
||
track_format = TRACK_FORMAT_XA;
|
||
track_green = false; /* ?? */
|
||
blocksize = CDIO_CD_FRAMESIZE;
|
||
break;
|
||
case 3:
|
||
track_format = TRACK_FORMAT_XA;
|
||
track_green = true;
|
||
blocksize = M2RAW_SECTOR_SIZE;
|
||
break;
|
||
case 7:
|
||
track_format = TRACK_FORMAT_AUDIO;
|
||
track_green = false;
|
||
blocksize = CDIO_CD_FRAMESIZE_RAW;
|
||
break;
|
||
default:
|
||
cdio_log (log_level,
|
||
"Don't know how to handle track mode (%lu)?",
|
||
(long unsigned int) track_mode);
|
||
free(footer_buf);
|
||
return false;
|
||
}
|
||
|
||
cdio_assert (_len % blocksize == 0);
|
||
|
||
_len /= blocksize;
|
||
|
||
cdio_assert (_start * blocksize == _start2);
|
||
|
||
_start += idx * CDIO_PREGAP_SECTORS;
|
||
_register_mapping (env, _start, _len, _start2, blocksize,
|
||
track_format, track_green, 0);
|
||
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
|
||
case ETN2_ID: { /* "ETN2", same as above, but with 64bit stuff instead */
|
||
unsigned entries = uint32_from_be (chunk->len);
|
||
_etn2_array_t *_entries = (void *) chunk->data;
|
||
|
||
cdio_assert (env->mapping == NULL);
|
||
|
||
cdio_assert (sizeof (_etn2_array_t) == 32);
|
||
cdio_assert (uint32_from_be (chunk->len) % sizeof (_etn2_array_t) == 0);
|
||
|
||
entries /= sizeof (_etn2_array_t);
|
||
|
||
cdio_info ("SAO type image (ETN2) detected");
|
||
|
||
{
|
||
int idx;
|
||
for (idx = 0; idx < entries; idx++) {
|
||
uint32_t _len = uint64_from_be (_entries[idx].length);
|
||
uint32_t _start = uint32_from_be (_entries[idx].start_lsn);
|
||
uint32_t _start2 = uint64_from_be (_entries[idx].start);
|
||
uint32_t track_mode= uint32_from_be (_entries[idx].type);
|
||
bool track_green = true;
|
||
track_format_t track_format = TRACK_FORMAT_XA;
|
||
uint16_t blocksize;
|
||
|
||
|
||
switch (track_mode) {
|
||
case 0:
|
||
track_format = TRACK_FORMAT_DATA;
|
||
track_green = false; /* ?? */
|
||
blocksize = CDIO_CD_FRAMESIZE;
|
||
break;
|
||
case 2:
|
||
track_format = TRACK_FORMAT_XA;
|
||
track_green = false; /* ?? */
|
||
blocksize = CDIO_CD_FRAMESIZE;
|
||
break;
|
||
case 3:
|
||
track_format = TRACK_FORMAT_XA;
|
||
track_green = true;
|
||
blocksize = M2RAW_SECTOR_SIZE;
|
||
break;
|
||
case 7:
|
||
track_format = TRACK_FORMAT_AUDIO;
|
||
track_green = false;
|
||
blocksize = CDIO_CD_FRAMESIZE_RAW;
|
||
break;
|
||
default:
|
||
cdio_log (log_level,
|
||
"Don't know how to handle track mode (%lu)?",
|
||
(long unsigned int) track_mode);
|
||
free(footer_buf);
|
||
return false;
|
||
}
|
||
|
||
if (_len % blocksize != 0) {
|
||
cdio_log (log_level,
|
||
"length is not a multiple of blocksize "
|
||
"len %lu, size %d, rem %lu",
|
||
(long unsigned int) _len, blocksize,
|
||
(long unsigned int) _len % blocksize);
|
||
if (0 == _len % CDIO_CD_FRAMESIZE) {
|
||
cdio_log(log_level, "Adjusting blocksize to %d",
|
||
CDIO_CD_FRAMESIZE);
|
||
blocksize = CDIO_CD_FRAMESIZE;
|
||
} else if (0 == _len % M2RAW_SECTOR_SIZE) {
|
||
cdio_log(log_level,
|
||
"Adjusting blocksize to %d", M2RAW_SECTOR_SIZE);
|
||
blocksize = M2RAW_SECTOR_SIZE;
|
||
} else if (0 == _len % CDIO_CD_FRAMESIZE_RAW) {
|
||
cdio_log(log_level,
|
||
"Adjusting blocksize to %d", CDIO_CD_FRAMESIZE_RAW);
|
||
blocksize = CDIO_CD_FRAMESIZE_RAW;
|
||
}
|
||
}
|
||
|
||
_len /= blocksize;
|
||
|
||
if (_start * blocksize != _start2) {
|
||
cdio_log (log_level,
|
||
"%lu * %d != %lu",
|
||
(long unsigned int) _start, blocksize,
|
||
(long unsigned int) _start2);
|
||
if (_start * CDIO_CD_FRAMESIZE == _start2) {
|
||
cdio_log(log_level,
|
||
"Adjusting blocksize to %d", CDIO_CD_FRAMESIZE);
|
||
blocksize = CDIO_CD_FRAMESIZE;
|
||
} else if (_start * M2RAW_SECTOR_SIZE == _start2) {
|
||
cdio_log(log_level,
|
||
"Adjusting blocksize to %d", M2RAW_SECTOR_SIZE);
|
||
blocksize = M2RAW_SECTOR_SIZE;
|
||
} else if (0 == _start * CDIO_CD_FRAMESIZE_RAW == _start2) {
|
||
cdio_log(log_level,
|
||
"Adjusting blocksize to %d", CDIO_CD_FRAMESIZE_RAW);
|
||
blocksize = CDIO_CD_FRAMESIZE_RAW;
|
||
}
|
||
}
|
||
|
||
_start += idx * CDIO_PREGAP_SECTORS;
|
||
_register_mapping (env, _start, _len, _start2, blocksize,
|
||
track_format, track_green, 0);
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
|
||
case SINF_ID: { /* "SINF" */
|
||
|
||
uint32_t *_sessions = (void *) chunk->data;
|
||
|
||
cdio_assert (UINT32_FROM_BE (chunk->len) == 4);
|
||
|
||
cdio_debug ("SINF: %lu sessions",
|
||
(long unsigned int) UINT32_FROM_BE (*_sessions));
|
||
}
|
||
break;
|
||
|
||
case MTYP_ID: { /* "MTYP" */
|
||
uint32_t *mtyp_p = (void *) chunk->data;
|
||
uint32_t mtyp = UINT32_FROM_BE (*mtyp_p);
|
||
|
||
cdio_assert (UINT32_FROM_BE (chunk->len) == 4);
|
||
|
||
cdio_debug ("MTYP: %lu",
|
||
(long unsigned int) UINT32_FROM_BE (*mtyp_p));
|
||
|
||
if (mtyp != MTYP_AUDIO_CD) {
|
||
cdio_log (log_level,
|
||
"Unknown MTYP value: %u", (unsigned int) mtyp);
|
||
}
|
||
env->mtyp = mtyp;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
cdio_log (log_level,
|
||
"unknown tag %8.8x seen",
|
||
(unsigned int) UINT32_FROM_BE (chunk->id));
|
||
break;
|
||
}
|
||
|
||
if (break_out)
|
||
break;
|
||
|
||
pos += 8;
|
||
pos += UINT32_FROM_BE (chunk->len);
|
||
}
|
||
}
|
||
|
||
/* Fake out leadout track. */
|
||
/* Don't use _stat_size_nrg since that will lead to recursion since
|
||
we haven't fully initialized things yet.
|
||
*/
|
||
cdio_lsn_to_msf (env->size, &env->tocent[env->i_tracks].start_msf);
|
||
env->tocent[env->i_tracks].start_lba = cdio_lsn_to_lba(env->size);
|
||
env->tocent[env->i_tracks-1].sec_count =
|
||
cdio_lsn_to_lba(env->size - env->tocent[env->i_tracks-1].start_lba);
|
||
|
||
free(footer_buf);
|
||
return true;
|
||
}
|
||
|
||
/*!
|
||
Initialize image structures.
|
||
*/
|
||
static bool
|
||
_init_nrg (_img_private_t *env)
|
||
{
|
||
if (env->gen.init) {
|
||
cdio_error ("init called more than once");
|
||
return false;
|
||
}
|
||
|
||
if (!(env->gen.data_source = cdio_stdio_new (env->gen.source_name))) {
|
||
cdio_warn ("can't open nrg image file %s for reading",
|
||
env->gen.source_name);
|
||
return false;
|
||
}
|
||
|
||
if ( !parse_nrg (env, env->gen.source_name) ) {
|
||
cdio_warn ("image file %s is not a Nero image",
|
||
env->gen.source_name);
|
||
return false;
|
||
}
|
||
|
||
env->gen.init = true;
|
||
return true;
|
||
|
||
}
|
||
|
||
/*!
|
||
Reads into buf the next size bytes.
|
||
Returns -1 on error.
|
||
Would be libc's seek() but we have to adjust for the extra track header
|
||
information in each sector.
|
||
*/
|
||
static off_t
|
||
_lseek_nrg (void *user_data, off_t offset, int whence)
|
||
{
|
||
_img_private_t *env = user_data;
|
||
|
||
/* real_offset is the real byte offset inside the disk image
|
||
The number below was determined empirically.
|
||
*/
|
||
off_t real_offset= env->is_dao ? 0x4b000 : 0;
|
||
|
||
unsigned int i;
|
||
|
||
for (i=0; i<env->i_tracks; i++) {
|
||
track_info_t *this_track=&(env->tocent[i]);
|
||
env->pos.index = i;
|
||
if ( (this_track->sec_count*this_track->datasize) >= offset) {
|
||
int blocks = offset / this_track->datasize;
|
||
int rem = offset % this_track->datasize;
|
||
int block_offset = blocks * this_track->blocksize;
|
||
real_offset += block_offset + rem;
|
||
env->pos.buff_offset = rem;
|
||
env->pos.lba += blocks;
|
||
break;
|
||
}
|
||
real_offset += this_track->sec_count*this_track->blocksize;
|
||
offset -= this_track->sec_count*this_track->datasize;
|
||
env->pos.lba += this_track->sec_count;
|
||
}
|
||
|
||
if (i==env->i_tracks) {
|
||
cdio_warn ("seeking outside range of disk image");
|
||
return -1;
|
||
} else
|
||
real_offset += env->tocent[i].datastart;
|
||
return cdio_stream_seek(env->gen.data_source, real_offset, whence);
|
||
}
|
||
|
||
/*!
|
||
Reads into buf the next size bytes.
|
||
Returns -1 on error.
|
||
FIXME:
|
||
At present we assume a read doesn't cross sector or track
|
||
boundaries.
|
||
*/
|
||
static ssize_t
|
||
_read_nrg (void *user_data, void *buf, size_t size)
|
||
{
|
||
_img_private_t *env = user_data;
|
||
return cdio_stream_read(env->gen.data_source, buf, size, 1);
|
||
}
|
||
|
||
static uint32_t
|
||
_stat_size_nrg (void *user_data)
|
||
{
|
||
_img_private_t *env = user_data;
|
||
|
||
return env->size;
|
||
}
|
||
|
||
/*!
|
||
Reads a single audio sector from CD device into data starting
|
||
from LSN. Returns 0 if no error.
|
||
*/
|
||
static int
|
||
_read_audio_sectors_nrg (void *user_data, void *data, lsn_t lsn,
|
||
unsigned int nblocks)
|
||
{
|
||
_img_private_t *env = user_data;
|
||
|
||
CdioListNode *node;
|
||
|
||
if (lsn >= env->size)
|
||
{
|
||
cdio_warn ("trying to read beyond image size (%lu >= %lu)",
|
||
(long unsigned int) lsn, (long unsigned int) env->size);
|
||
return -1;
|
||
}
|
||
|
||
_CDIO_LIST_FOREACH (node, env->mapping) {
|
||
_mapping_t *_map = _cdio_list_node_data (node);
|
||
|
||
if (IN (lsn, _map->start_lsn, (_map->start_lsn + _map->sec_count - 1))) {
|
||
int ret;
|
||
long int img_offset = _map->img_offset;
|
||
|
||
img_offset += (lsn - _map->start_lsn) * CDIO_CD_FRAMESIZE_RAW;
|
||
|
||
ret = cdio_stream_seek (env->gen.data_source, img_offset,
|
||
SEEK_SET);
|
||
if (ret!=0) return ret;
|
||
ret = cdio_stream_read (env->gen.data_source, data,
|
||
CDIO_CD_FRAMESIZE_RAW, nblocks);
|
||
if (ret==0) return ret;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (!node) cdio_warn ("reading into pre gap (lsn %lu)",
|
||
(long unsigned int) lsn);
|
||
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
_read_mode1_sector_nrg (void *user_data, void *data, lsn_t lsn,
|
||
bool b_form2)
|
||
{
|
||
_img_private_t *env = user_data;
|
||
char buf[CDIO_CD_FRAMESIZE_RAW] = { 0, };
|
||
|
||
CdioListNode *node;
|
||
|
||
if (lsn >= env->size)
|
||
{
|
||
cdio_warn ("trying to read beyond image size (%lu >= %lu)",
|
||
(long unsigned int) lsn, (long unsigned int) env->size);
|
||
return -1;
|
||
}
|
||
|
||
_CDIO_LIST_FOREACH (node, env->mapping) {
|
||
_mapping_t *_map = _cdio_list_node_data (node);
|
||
|
||
if (IN (lsn, _map->start_lsn, (_map->start_lsn + _map->sec_count - 1))) {
|
||
int ret;
|
||
long int img_offset = _map->img_offset;
|
||
|
||
img_offset += (lsn - _map->start_lsn) * _map->blocksize;
|
||
|
||
ret = cdio_stream_seek (env->gen.data_source, img_offset,
|
||
SEEK_SET);
|
||
if (ret!=0) return ret;
|
||
|
||
/* FIXME: Not completely sure the below is correct. */
|
||
ret = cdio_stream_read (env->gen.data_source,
|
||
(M2RAW_SECTOR_SIZE == _map->blocksize)
|
||
? (buf + CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE)
|
||
: buf,
|
||
_map->blocksize, 1);
|
||
if (ret==0) return ret;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (!node)
|
||
cdio_warn ("reading into pre gap (lsn %lu)", (long unsigned int) lsn);
|
||
|
||
memcpy (data, buf + CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE,
|
||
b_form2 ? M2RAW_SECTOR_SIZE: CDIO_CD_FRAMESIZE);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*!
|
||
Reads nblocks of mode2 sectors from cd device into data starting
|
||
from lsn.
|
||
Returns 0 if no error.
|
||
*/
|
||
static int
|
||
_read_mode1_sectors_nrg (void *user_data, void *data, lsn_t lsn,
|
||
bool b_form2, unsigned nblocks)
|
||
{
|
||
_img_private_t *env = user_data;
|
||
int i;
|
||
int retval;
|
||
unsigned int blocksize = b_form2 ? M2RAW_SECTOR_SIZE : CDIO_CD_FRAMESIZE;
|
||
|
||
for (i = 0; i < nblocks; i++) {
|
||
if ( (retval = _read_mode1_sector_nrg (env,
|
||
((char *)data) + (blocksize * i),
|
||
lsn + i, b_form2)) )
|
||
return retval;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
_read_mode2_sector_nrg (void *user_data, void *data, lsn_t lsn,
|
||
bool b_form2)
|
||
{
|
||
_img_private_t *env = user_data;
|
||
char buf[CDIO_CD_FRAMESIZE_RAW] = { 0, };
|
||
|
||
CdioListNode *node;
|
||
|
||
if (lsn >= env->size)
|
||
{
|
||
cdio_warn ("trying to read beyond image size (%lu >= %lu)",
|
||
(long unsigned int) lsn, (long unsigned int) env->size);
|
||
return -1;
|
||
}
|
||
|
||
_CDIO_LIST_FOREACH (node, env->mapping) {
|
||
_mapping_t *_map = _cdio_list_node_data (node);
|
||
|
||
if (IN (lsn, _map->start_lsn, (_map->start_lsn + _map->sec_count - 1))) {
|
||
int ret;
|
||
long int img_offset = _map->img_offset;
|
||
|
||
img_offset += (lsn - _map->start_lsn) * _map->blocksize;
|
||
|
||
ret = cdio_stream_seek (env->gen.data_source, img_offset,
|
||
SEEK_SET);
|
||
if (ret!=0) return ret;
|
||
ret = cdio_stream_read (env->gen.data_source,
|
||
(M2RAW_SECTOR_SIZE == _map->blocksize)
|
||
? (buf + CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE)
|
||
: buf,
|
||
_map->blocksize, 1);
|
||
if (ret==0) return ret;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (!node)
|
||
cdio_warn ("reading into pre gap (lsn %lu)", (long unsigned int) lsn);
|
||
|
||
if (b_form2)
|
||
memcpy (data, buf + CDIO_CD_SYNC_SIZE + CDIO_CD_HEADER_SIZE,
|
||
M2RAW_SECTOR_SIZE);
|
||
else
|
||
memcpy (data, buf + CDIO_CD_XA_SYNC_HEADER, CDIO_CD_FRAMESIZE);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*!
|
||
Reads nblocks of mode2 sectors from cd device into data starting
|
||
from lsn.
|
||
Returns 0 if no error.
|
||
*/
|
||
static int
|
||
_read_mode2_sectors_nrg (void *user_data, void *data, lsn_t lsn,
|
||
bool b_form2, unsigned nblocks)
|
||
{
|
||
_img_private_t *env = user_data;
|
||
int i;
|
||
int retval;
|
||
unsigned int blocksize = b_form2 ? M2RAW_SECTOR_SIZE : CDIO_CD_FRAMESIZE;
|
||
|
||
for (i = 0; i < nblocks; i++) {
|
||
if ( (retval = _read_mode2_sector_nrg (env,
|
||
((char *)data) + (blocksize * i),
|
||
lsn + i, b_form2)) )
|
||
return retval;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
Free memory resources associated with NRG object.
|
||
*/
|
||
static void
|
||
_free_nrg (void *user_data)
|
||
{
|
||
_img_private_t *env = user_data;
|
||
|
||
if (NULL == env) return;
|
||
if (NULL != env->mapping)
|
||
_cdio_list_free (env->mapping, true);
|
||
cdio_generic_stdio_free(env);
|
||
free(env);
|
||
}
|
||
|
||
/*!
|
||
Eject media -- there's nothing to do here except free resources.
|
||
We always return 2.
|
||
*/
|
||
static int
|
||
_eject_media_nrg(void *obj)
|
||
{
|
||
_free_nrg (obj);
|
||
return 2;
|
||
}
|
||
|
||
/*
|
||
Set the device to use in I/O operations.
|
||
*/
|
||
static int
|
||
_set_arg_nrg (void *user_data, const char key[], const char value[])
|
||
{
|
||
_img_private_t *env = user_data;
|
||
|
||
if (!strcmp (key, "source"))
|
||
{
|
||
free (env->gen.source_name);
|
||
|
||
if (!value)
|
||
return -2;
|
||
|
||
env->gen.source_name = strdup (value);
|
||
}
|
||
else
|
||
return -1;
|
||
|
||
return 0;
|
||
}
|
||
|
||
/*!
|
||
Return the value associated with the key "arg".
|
||
*/
|
||
static const char *
|
||
_get_arg_nrg (void *user_data, const char key[])
|
||
{
|
||
_img_private_t *env = user_data;
|
||
|
||
if (!strcmp (key, "source")) {
|
||
return env->gen.source_name;
|
||
} else if (!strcmp(key, "access-mode")) {
|
||
return "image";
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
/*!
|
||
Return an array of strings giving possible NRG disk images.
|
||
*/
|
||
char **
|
||
cdio_get_devices_nrg (void)
|
||
{
|
||
char **drives = NULL;
|
||
unsigned int num_files=0;
|
||
#ifdef HAVE_GLOB_H
|
||
unsigned int i;
|
||
glob_t globbuf;
|
||
globbuf.gl_offs = 0;
|
||
glob("*.nrg", GLOB_DOOFFS, NULL, &globbuf);
|
||
for (i=0; i<globbuf.gl_pathc; i++) {
|
||
cdio_add_device_list(&drives, globbuf.gl_pathv[i], &num_files);
|
||
}
|
||
globfree(&globbuf);
|
||
#else
|
||
cdio_add_device_list(&drives, DEFAULT_CDIO_DEVICE, &num_files);
|
||
#endif /*HAVE_GLOB_H*/
|
||
cdio_add_device_list(&drives, NULL, &num_files);
|
||
return drives;
|
||
}
|
||
|
||
/*!
|
||
Return a string containing the default CD device.
|
||
*/
|
||
char *
|
||
cdio_get_default_device_nrg(void)
|
||
{
|
||
char **drives = cdio_get_devices_nrg();
|
||
char *drive = (drives[0] == NULL) ? NULL : strdup(drives[0]);
|
||
cdio_free_device_list(drives);
|
||
return drive;
|
||
}
|
||
|
||
/*!
|
||
Return the the kind of drive capabilities of device.
|
||
|
||
Note: string is malloc'd so caller should free() then returned
|
||
string when done with it.
|
||
|
||
*/
|
||
static cdio_drive_cap_t
|
||
_get_drive_cap_nrg (const void *user_data) {
|
||
|
||
/* There may be more in the future but these we can handle now.
|
||
Also, we know we can't handle
|
||
LOCK, OPEN_TRAY, CLOSE_TRAY, SELECT_SPEED, SELECT_DISC
|
||
*/
|
||
return CDIO_DRIVE_CAP_FILE | CDIO_DRIVE_CAP_MCN | CDIO_DRIVE_CAP_CD_AUDIO ;
|
||
}
|
||
|
||
/*!
|
||
Return the number of tracks in the current medium.
|
||
CDIO_INVALID_TRACK is returned on error.
|
||
*/
|
||
static track_format_t
|
||
_get_track_format_nrg(void *user_data, track_t track_num)
|
||
{
|
||
_img_private_t *env = user_data;
|
||
|
||
if (track_num > env->i_tracks || track_num == 0)
|
||
return TRACK_FORMAT_ERROR;
|
||
|
||
if ( env->dtyp != DTYP_INVALID) {
|
||
switch (env->dtyp) {
|
||
case DTYP_MODE2_XA:
|
||
return TRACK_FORMAT_XA;
|
||
case DTYP_MODE1:
|
||
return TRACK_FORMAT_DATA;
|
||
default: ;
|
||
}
|
||
}
|
||
|
||
/*if ( MTYP_AUDIO_CD == env->mtyp) return TRACK_FORMAT_AUDIO; */
|
||
return env->tocent[track_num-1].track_format;
|
||
}
|
||
|
||
/*!
|
||
Return true if we have XA data (green, mode2 form1) or
|
||
XA data (green, mode2 form2). That is track begins:
|
||
sync - header - subheader
|
||
12 4 - 8
|
||
|
||
FIXME: there's gotta be a better design for this and get_track_format?
|
||
*/
|
||
static bool
|
||
_get_track_green_nrg(void *user_data, track_t track_num)
|
||
{
|
||
_img_private_t *env = user_data;
|
||
|
||
if (track_num > env->i_tracks || track_num == 0)
|
||
return false;
|
||
|
||
if ( MTYP_AUDIO_CD == env->mtyp) return false;
|
||
return env->tocent[track_num-1].track_green;
|
||
}
|
||
|
||
/*!
|
||
Check that a NRG file is valid.
|
||
|
||
*/
|
||
/* Later we'll probably do better. For now though, this gets us
|
||
started for now.
|
||
*/
|
||
bool
|
||
cdio_is_nrg(const char *psz_nrg)
|
||
{
|
||
unsigned int i;
|
||
|
||
if (psz_nrg == NULL) return false;
|
||
|
||
i=strlen(psz_nrg)-strlen("nrg");
|
||
|
||
if (i>0) {
|
||
if (psz_nrg[i]=='n' && psz_nrg[i+1]=='r' && psz_nrg[i+2]=='g') {
|
||
return true;
|
||
}
|
||
else if (psz_nrg[i]=='N' && psz_nrg[i+1]=='R' && psz_nrg[i+2]=='G') {
|
||
return true;
|
||
}
|
||
}
|
||
return false;
|
||
}
|
||
|
||
/*!
|
||
Initialization routine. This is the only thing that doesn't
|
||
get called via a function pointer. In fact *we* are the
|
||
ones to set that up.
|
||
*/
|
||
CdIo *
|
||
cdio_open_am_nrg (const char *psz_source_name, const char *psz_access_mode)
|
||
{
|
||
if (psz_access_mode != NULL && strcmp(psz_access_mode, "image"))
|
||
cdio_warn ("there is only one access mode for nrg. Arg %s ignored",
|
||
psz_access_mode);
|
||
return cdio_open_nrg(psz_source_name);
|
||
}
|
||
|
||
|
||
CdIo *
|
||
cdio_open_nrg (const char *psz_source)
|
||
{
|
||
CdIo *ret;
|
||
_img_private_t *_data;
|
||
|
||
cdio_funcs _funcs = {
|
||
.eject_media = _eject_media_nrg,
|
||
.free = _free_nrg,
|
||
.get_arg = _get_arg_nrg,
|
||
.get_devices = cdio_get_devices_nrg,
|
||
.get_default_device = cdio_get_default_device_nrg,
|
||
.get_drive_cap = _get_drive_cap_nrg,
|
||
.get_first_track_num= _get_first_track_num_image,
|
||
.get_mcn = _get_mcn_image,
|
||
.get_num_tracks = _get_num_tracks_image,
|
||
.get_track_format = _get_track_format_nrg,
|
||
.get_track_green = _get_track_green_nrg,
|
||
.get_track_lba = NULL, /* Will use generic routine via msf */
|
||
.get_track_msf = _get_track_msf_image,
|
||
.lseek = _lseek_nrg,
|
||
.read = _read_nrg,
|
||
.read_audio_sectors = _read_audio_sectors_nrg,
|
||
.read_mode1_sector = _read_mode1_sector_nrg,
|
||
.read_mode1_sectors = _read_mode1_sectors_nrg,
|
||
.read_mode2_sector = _read_mode2_sector_nrg,
|
||
.read_mode2_sectors = _read_mode2_sectors_nrg,
|
||
.set_arg = _set_arg_nrg,
|
||
.stat_size = _stat_size_nrg,
|
||
};
|
||
|
||
_data = _cdio_malloc (sizeof (_img_private_t));
|
||
_data->gen.init = false;
|
||
|
||
_data->i_tracks = 0;
|
||
_data->mtyp = 0;
|
||
_data->dtyp = DTYP_INVALID;
|
||
_data->i_first_track = 1;
|
||
_data->is_dao = false;
|
||
_data->is_cues = false; /* FIXME: remove is_cues. */
|
||
|
||
_set_arg_nrg(_data, "source", (NULL == psz_source)
|
||
? DEFAULT_CDIO_DEVICE: psz_source);
|
||
|
||
ret = cdio_new (_data, &_funcs);
|
||
|
||
if (ret == NULL) return NULL;
|
||
|
||
if (!cdio_is_nrg(psz_source)) {
|
||
cdio_debug ("source name %s is not recognized as a NRG image",
|
||
psz_source);
|
||
return NULL;
|
||
}
|
||
|
||
if (_init_nrg(_data))
|
||
return ret;
|
||
else {
|
||
_free_nrg(_data);
|
||
return NULL;
|
||
}
|
||
|
||
}
|
||
|
||
bool
|
||
cdio_have_nrg (void)
|
||
{
|
||
return true;
|
||
}
|