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/*
* This file has been modified for the cdrkit suite.
*
* The behaviour and appearence of the program code below can differ to a major
* extent from the version distributed by the original author(s).
*
* For details, see Changelog file distributed with the cdrkit package. If you
* received this file from another source then ask the distributing person for
* a log of modifications.
*
*/
/* @(#)sector.c 1.13 04/03/01 Copyright 2001-2004 J. Schilling */
/*
* Functions needed to use libedc_ecc from cdrecord
*
* Copyright (c) 2001-2004 J. Schilling
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* 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.
*
* You should have received a copy of the GNU General Public License along with
* this program; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <mconfig.h>
#include <stdio.h>
#include <standard.h>
#include <utypes.h>
#include <timedefs.h>
#include <schily.h>
#include "wodim.h"
#include "movesect.h"
#ifdef HAVE_LIB_EDC_ECC
#define LAYER2
#define EDC_LAYER2
#define ENCODER
#define EDC_ENCODER
#include <ecc.h>
#ifdef DO8
#define HAVE_NEW_LIB_EDC
#endif
int encspeed(BOOL be_verbose);
void encsectors(track_t *trackp, Uchar *bp, int address, int nsecs);
void scrsectors(track_t *trackp, Uchar *bp, int address, int nsecs);
void encodesector(Uchar *sp, int sectype, int address);
void fillsector(Uchar *sp, int sectype, int address);
/*
* Sector types known by lib libedc_ecc:
*/
#ifdef __comment__
/* MMC */
#define MODE_0 0 /* -> XX 12+4+2336 (12+4uuu von libedc) */
#define MODE_1 1 /* -> 8 12+4+2048+288 (124+4uuu+288 von libedc)*/
#define MODE_2 2 /* -> 9 12+4+2336 (12+4uuu von libedc) */
#define MODE_2_FORM_1 3 /* -> 10/11 12+4+8+2048+280 (12+4hhhuuu+280 von libedc)*/
#define MODE_2_FORM_2 4 /* -> 12 (eher 13!) 12+4+8+2324+4 (12+4hhhuuu+4 von libedc)*/
#define AUDIO 5
#define UNKNOWN 6
#endif
/*
* known sector types
*/
#ifndef EDC_MODE_0
#define EDC_MODE_0 MODE_0
#endif
#ifndef EDC_MODE_1
#define EDC_MODE_1 MODE_1
#endif
#ifndef EDC_MODE_2
#define EDC_MODE_2 MODE_2
#endif
#ifndef EDC_MODE_2_FORM_1
#define EDC_MODE_2_FORM_1 MODE_2_FORM_1
#endif
#ifndef EDC_MODE_2_FORM_2
#define EDC_MODE_2_FORM_2 MODE_2_FORM_2
#endif
#ifndef EDC_AUDIO
#define EDC_AUDIO AUDIO
#endif
#ifndef EDC_UNKNOWN
#define EDC_UNKNOWN UNKNOWN
#endif
/*
* Compute max sector encoding speed
*/
int
encspeed(BOOL be_verbose)
{
track_t t[1];
Uchar sect[2352];
int i;
struct timeval tv;
struct timeval tv2;
t[0].sectype = ST_MODE_1;
/*
* Encoding speed is content dependant.
* Set up a known non-null pattern in the sector before; to make
* the result of this test independant of the current stack content.
*/
for (i = 0; i < 2352; ) {
sect[i++] = 'J';
sect[i++] = 'S';
}
gettimeofday(&tv, (struct timezone *)0);
for (i = 0; i < 75000; i++) { /* Goes up to 1000x */
encsectors(t, sect, 12345, 1);
gettimeofday(&tv2, (struct timezone *)0);
if (tv2.tv_sec >= (tv.tv_sec+1) &&
tv2.tv_usec >= tv.tv_usec)
break;
}
if (be_verbose) {
printf("Encoding speed : %dx (%d sectors/s) for libedc from Heiko Eißfeldt\n",
(i+74)/75, i);
}
return ((i+74)/75);
}
/*
* Encode sectors according to trackp->sectype
*/
void
encsectors(track_t *trackp, Uchar *bp, int address, int nsecs)
{
int sectype = trackp->sectype;
if ((sectype & ST_MODE_MASK) == ST_MODE_AUDIO)
return;
while (--nsecs >= 0) {
encodesector(bp, sectype, address);
address++;
bp += trackp->secsize;
}
}
#ifdef CLONE_WRITE
#define IS_SECHDR(p) ((p)[0] == 0 && \
(p)[1] == 0xFF && (p)[2] == 0xFF && \
(p)[3] == 0xFF && (p)[4] == 0xFF && \
(p)[5] == 0xFF && (p)[6] == 0xFF && \
(p)[7] == 0xFF && (p)[8] == 0xFF && \
(p)[9] == 0xFF && (p)[10] == 0xFF && \
(p)[11] == 0)
/*
* Scramble data sectors without coding (needed for clone writing)
*/
void
scrsectors(track_t *trackp, Uchar *bp, int address, int nsecs)
{
/*
* In Clone write mode, we cannot expect that the sector type
* of a "track" which really is a file holding the whole disk
* is flagged with something that makes sense.
*
* For this reason, we check each sector if it's a data sector
* and needs scrambling.
*/
while (--nsecs >= 0) {
if (IS_SECHDR(bp))
scramble_L2(bp);
bp += trackp->secsize;
}
}
#else
void
scrsectors(track_t *trackp, Uchar *bp, int address, int nsecs)
{
comerrno(EX_BAD, "Cannot write in clone RAW mode.\n");
}
#endif
/*
* Encode one sector according to trackp->sectype
*/
void
encodesector(Uchar *sp, int sectype, int address)
{
if (address < -150)
address += 450150;
else
address += 150;
#define _address address
switch (sectype & ST_MODE_MASK) {
case ST_MODE_0:
do_encode_L2(sp, EDC_MODE_0, _address);
break;
case ST_MODE_1:
do_encode_L2(sp, EDC_MODE_1, _address);
break;
case ST_MODE_2:
do_encode_L2(sp, EDC_MODE_2, _address);
break;
case ST_MODE_2_FORM_1:
sp[16+2] &= ~0x20; /* Form 1 sector */
sp[16+4+2] &= ~0x20; /* Form 1 sector 2nd copy */
/* FALLTHROUGH */
case ST_MODE_2_MIXED:
do_encode_L2(sp, EDC_MODE_2_FORM_1, _address);
break;
case ST_MODE_2_FORM_2:
sp[16+2] |= 0x20; /* Form 2 sector */
sp[16+4+2] |= 0x20; /* Form 2 sector 2nd copy */
do_encode_L2(sp, EDC_MODE_2_FORM_2, _address);
break;
case ST_MODE_AUDIO:
return;
default:
fill2352(sp, '\0');
return;
}
if ((sectype & ST_NOSCRAMBLE) == 0) {
scramble_L2(sp);
#ifndef EDC_SCRAMBLE_NOSWAP
swabbytes(sp, 2352);
#endif
}
}
/*
* Create one zero filles encoded sector (according to trackp->sectype)
*/
void
fillsector(Uchar *sp, int sectype, int address)
{
fill2352(sp, '\0');
encodesector(sp, sectype, address);
}
#endif /* HAVE_LIB_EDC_ECC */
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