1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/gdrom/ecc.h	Sat Jun 14 11:54:15 2008 +0000
     1.3 @@ -0,0 +1,136 @@
     1.4 +/*
     1.5 + * This file has been modified for the cdrkit suite.
     1.6 + *
     1.7 + * The behaviour and appearence of the program code below can differ to a major
     1.8 + * extent from the version distributed by the original author(s).
     1.9 + *
    1.10 + * For details, see Changelog file distributed with the cdrkit package. If you
    1.11 + * received this file from another source then ask the distributing person for
    1.12 + * a log of modifications.
    1.13 + *
    1.14 + */
    1.15 +
    1.16 +/* @(#)ecc.h	1.4 02/10/19 Copyright 1998-2002 Heiko Eissfeldt, Joerg Schilling */
    1.17 +
    1.18 +/*
    1.19 + * compact disc reed-solomon routines
    1.20 + *
    1.21 + * (c) 1998-2002 by Heiko Eissfeldt, heiko@colossus.escape.de
    1.22 + * (c) 2002 by Joerg Schilling
    1.23 + */
    1.24 +/*
    1.25 + * This program is free software; you can redistribute it and/or modify
    1.26 + * it under the terms of the GNU General Public License version 2
    1.27 + * as published by the Free Software Foundation.
    1.28 + *
    1.29 + * This program is distributed in the hope that it will be useful,
    1.30 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.31 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.32 + * GNU General Public License for more details.
    1.33 + *
    1.34 + * You should have received a copy of the GNU General Public License along with
    1.35 + * this program; see the file COPYING.  If not, write to the Free Software
    1.36 + * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
    1.37 + */
    1.38 +
    1.39 +#define RS_L12_BITS 8
    1.40 +
    1.41 +/* audio sector definitions for CIRC */
    1.42 +#define FRAMES_PER_SECTOR 98
    1.43 +/* user data bytes per frame */
    1.44 +#define L1_RAW 24
    1.45 +/* parity bytes with 8 bit */
    1.46 +#define L1_Q   4
    1.47 +#define L1_P   4
    1.48 +
    1.49 +int cd_build_address(unsigned char inout[], int sectortype, unsigned address);
    1.50 +
    1.51 +/* audio sector Cross Interleaved Reed-Solomon Code (CIRC) encoder (layer 1) */
    1.52 +/* adds P- and Q- parity information to audio (f2) frames. Also
    1.53 +   optionally handles the various delays and permutations. The output with all
    1.54 +   stages enabled can be fed into the Eight-Fourteen-Modulator.
    1.55 +   On input: 2352 bytes of audio data is given.
    1.56 +   On output: 3136 bytes of CIRC enriched audio data are returned.
    1.57 + */
    1.58 +int do_encode_L1(unsigned char in[L1_RAW*FRAMES_PER_SECTOR],
    1.59 +					  unsigned char out[(L1_RAW+L1_Q+L1_P)*FRAMES_PER_SECTOR],
    1.60 +					  int delay1, int delay2, int delay3, int scramble);
    1.61 +
    1.62 +/* data sector definitions for RSPC */
    1.63 +/* user data bytes per frame */
    1.64 +#define L2_RAW (1024*2)
    1.65 +/* parity bytes for 16 bit units */
    1.66 +#define L2_Q   (26*2*2)
    1.67 +#define L2_P   (43*2*2)
    1.68 +
    1.69 +/* known sector types */
    1.70 +#define MODE_0	GDROM_MODE0
    1.71 +#define MODE_1	GDROM_MODE1
    1.72 +#define MODE_2	GDROM_MODE2_FORMLESS
    1.73 +#define MODE_2_FORM_1	GDROM_MODE2_FORM1
    1.74 +#define MODE_2_FORM_2	GDROM_MODE2_FORM2
    1.75 +
    1.76 +/* set one of the MODE_* constants for subsequent data sector formatting */
    1.77 +int set_sector_type(int st);
    1.78 +/* get the current sector type setting for data sector formatting */
    1.79 +int get_sector_type(void);
    1.80 +
    1.81 +/* data sector layer 2 Reed-Solomon Product Code encoder */
    1.82 +/* encode the given data portion depending on sector type (see
    1.83 +   get/set_sector_type() functions). Use the given address for the header.
    1.84 +   The returned data is __unscrambled__ and not in F2-frame format (for that
    1.85 +   see function scramble_L2()).
    1.86 +   Supported sector types:
    1.87 +     MODE_0: a 12-byte sync field, a header and 2336 zeros are returned.
    1.88 +     MODE_1: the user data portion (2048 bytes) has to be given
    1.89 +             at offset 16 in the inout array.
    1.90 +             Sync-, header-, edc-, spare-, p- and q- fields will be added.
    1.91 +     MODE_2: the user data portion (2336 bytes) has to be given
    1.92 +             at offset 16 in the inout array.
    1.93 +             Sync- and header- fields will be added.
    1.94 +     MODE_2_FORM_1: the user data portion (8 bytes subheader followed
    1.95 +                    by 2048 bytes data) has to be given at offset 16
    1.96 +                    in the inout array.
    1.97 +                    Sync-, header-, edc-, p- and q- fields will be added.
    1.98 +     MODE_2_FORM_2: the user data portion (8 bytes subheader followed
    1.99 +                    by 2324 bytes data) has to be given at offset 16
   1.100 +                    in the inout array.
   1.101 +                    Sync-, header- and edc- fields will be added.
   1.102 +*/
   1.103 +int do_encode_L2(unsigned char *inout, int sectortype, unsigned address);
   1.104 +int decode_L2_Q(unsigned char inout[4 + L2_RAW + 12 + L2_Q]);
   1.105 +int decode_L2_P(unsigned char inout[4 + L2_RAW + 12 + L2_Q + L2_P]);
   1.106 +unsigned int build_edc(unsigned char inout[], int from, int upto);
   1.107 +
   1.108 +/* generates f2 frames from otherwise fully formatted sectors (generated by
   1.109 +   do_encode_L2()). */
   1.110 +#define	EDC_SCRAMBLE_NOSWAP	1	/* Do not swap bytes while scrambling */
   1.111 +int scramble_L2(unsigned char *inout);
   1.112 +
   1.113 +/* r-w sub channel definitions */
   1.114 +#define RS_SUB_RW_BITS 6
   1.115 +
   1.116 +#define PACKETS_PER_SUBCHANNELFRAME 4
   1.117 +#define LSUB_RAW 18
   1.118 +#define LSUB_QRAW 2
   1.119 +/* 6 bit */
   1.120 +#define LSUB_Q 2
   1.121 +#define LSUB_P 4
   1.122 +
   1.123 +/* R-W subchannel encoder */
   1.124 +/* On input: 72 bytes packed user data, four frames with each 18 bytes.
   1.125 +   On output: per frame: 2 bytes user data, 2 bytes Q parity, 
   1.126 +                         16 bytes user data, 4 bytes P parity.
   1.127 +   Options:
   1.128 +     delay1: use low level delay line
   1.129 +     scramble: perform low level permutations
   1.130 + */
   1.131 +int do_encode_sub(unsigned char in[LSUB_RAW*PACKETS_PER_SUBCHANNELFRAME],
   1.132 +		unsigned char out[(LSUB_RAW+LSUB_Q+LSUB_P)*PACKETS_PER_SUBCHANNELFRAME],
   1.133 +		int delay1, int scramble);
   1.134 +int do_decode_sub(unsigned char in[(LSUB_RAW+LSUB_Q+LSUB_P)*PACKETS_PER_SUBCHANNELFRAME],
   1.135 +						unsigned char out[LSUB_RAW*PACKETS_PER_SUBCHANNELFRAME],
   1.136 +						int delay1, int scramble);
   1.137 +
   1.138 +int decode_LSUB_Q(unsigned char inout[LSUB_QRAW + LSUB_Q]);
   1.139 +int decode_LSUB_P(unsigned char inout[LSUB_RAW + LSUB_Q + LSUB_P]);