/*

  * 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.

  *

  */

 /* @(#)ecc.h	1.4 02/10/19 Copyright 1998-2002 Heiko Eissfeldt, Joerg Schilling */

 /*

  * compact disc reed-solomon routines

  *

  * (c) 1998-2002 by Heiko Eissfeldt, heiko@colossus.escape.de

  * (c) 2002 by Joerg 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.

  */

 #define RS_L12_BITS 8

 /* audio sector definitions for CIRC */

 #define FRAMES_PER_SECTOR 98

 /* user data bytes per frame */

 #define L1_RAW 24

 /* parity bytes with 8 bit */

 #define L1_Q   4

 #define L1_P   4

 int cd_build_address(unsigned char inout[], int sectortype, unsigned address);

 /* audio sector Cross Interleaved Reed-Solomon Code (CIRC) encoder (layer 1) */

 /* adds P- and Q- parity information to audio (f2) frames. Also

    optionally handles the various delays and permutations. The output with all

    stages enabled can be fed into the Eight-Fourteen-Modulator.

    On input: 2352 bytes of audio data is given.

    On output: 3136 bytes of CIRC enriched audio data are returned.

  */

 int do_encode_L1(unsigned char in[L1_RAW*FRAMES_PER_SECTOR],

 					  unsigned char out[(L1_RAW+L1_Q+L1_P)*FRAMES_PER_SECTOR],

 					  int delay1, int delay2, int delay3, int scramble);

 /* data sector definitions for RSPC */

 /* user data bytes per frame */

 #define L2_RAW (1024*2)

 /* parity bytes for 16 bit units */

 #define L2_Q   (26*2*2)

 #define L2_P   (43*2*2)

 /* known sector types */

 #define MODE_0	SECTOR_UNKNOWN

 #define MODE_1	SECTOR_MODE1

 #define MODE_2	SECTOR_MODE2_FORMLESS

 #define MODE_2_FORM_1	SECTOR_MODE2_FORM1

 #define MODE_2_FORM_2	SECTOR_MODE2_FORM2

 /* set one of the MODE_* constants for subsequent data sector formatting */

 int set_sector_type(int st);

 /* get the current sector type setting for data sector formatting */

 int get_sector_type(void);

 /* data sector layer 2 Reed-Solomon Product Code encoder */

 /* encode the given data portion depending on sector type (see

    get/set_sector_type() functions). Use the given address for the header.

    The returned data is __unscrambled__ and not in F2-frame format (for that

    see function scramble_L2()).

    Supported sector types:

      MODE_0: a 12-byte sync field, a header and 2336 zeros are returned.

      MODE_1: the user data portion (2048 bytes) has to be given

              at offset 16 in the inout array.

              Sync-, header-, edc-, spare-, p- and q- fields will be added.

      MODE_2: the user data portion (2336 bytes) has to be given

              at offset 16 in the inout array.

              Sync- and header- fields will be added.

      MODE_2_FORM_1: the user data portion (8 bytes subheader followed

                     by 2048 bytes data) has to be given at offset 16

                     in the inout array.

                     Sync-, header-, edc-, p- and q- fields will be added.

      MODE_2_FORM_2: the user data portion (8 bytes subheader followed

                     by 2324 bytes data) has to be given at offset 16

                     in the inout array.

                     Sync-, header- and edc- fields will be added.

 */

 int do_encode_L2(unsigned char *inout, int sectortype, unsigned address);

 int decode_L2_Q(unsigned char inout[4 + L2_RAW + 12 + L2_Q]);

 int decode_L2_P(unsigned char inout[4 + L2_RAW + 12 + L2_Q + L2_P]);

 unsigned int build_edc(unsigned char inout[], int from, int upto);

 /* generates f2 frames from otherwise fully formatted sectors (generated by

    do_encode_L2()). */

 #define	EDC_SCRAMBLE_NOSWAP	1	/* Do not swap bytes while scrambling */

 int scramble_L2(unsigned char *inout);

 /* r-w sub channel definitions */

 #define RS_SUB_RW_BITS 6

 #define PACKETS_PER_SUBCHANNELFRAME 4

 #define LSUB_RAW 18

 #define LSUB_QRAW 2

 /* 6 bit */

 #define LSUB_Q 2

 #define LSUB_P 4

 /* R-W subchannel encoder */

 /* On input: 72 bytes packed user data, four frames with each 18 bytes.

    On output: per frame: 2 bytes user data, 2 bytes Q parity, 

                          16 bytes user data, 4 bytes P parity.

    Options:

      delay1: use low level delay line

      scramble: perform low level permutations

  */

 int do_encode_sub(unsigned char in[LSUB_RAW*PACKETS_PER_SUBCHANNELFRAME],

 		unsigned char out[(LSUB_RAW+LSUB_Q+LSUB_P)*PACKETS_PER_SUBCHANNELFRAME],

 		int delay1, int scramble);

 int do_decode_sub(unsigned char in[(LSUB_RAW+LSUB_Q+LSUB_P)*PACKETS_PER_SUBCHANNELFRAME],

 						unsigned char out[LSUB_RAW*PACKETS_PER_SUBCHANNELFRAME],

 						int delay1, int scramble);

 int decode_LSUB_Q(unsigned char inout[LSUB_QRAW + LSUB_Q]);

 int decode_LSUB_P(unsigned char inout[LSUB_RAW + LSUB_Q + LSUB_P]);