Imported Upstream version 1.1.11upstream/1.1.11upstream

1 files changed, 134 insertions, 0 deletions

diff --git a/libedc/ecc.h b/libedc/ecc.h
new file mode 100644
index 0000000..76062b2
--- /dev/null
+++ b/libedc/ecc.h
@@ -0,0 +1,134 @@
+/*
+ * 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
+
+/* 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	0
+#define MODE_1	1
+#define MODE_2	2
+#define MODE_2_FORM_1	3
+#define MODE_2_FORM_2	4
+
+/* 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]);