X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=src%2Fcore%2Fao_fec_tx.c;fp=src%2Fcore%2Fao_fec_tx.c;h=0000000000000000000000000000000000000000;hp=4941d74581254ec26402218b9ed952cdbc03138b;hb=24167015705ae831692b95735968b04a876f935e;hpb=bb9fdef607728cc326a82aa632e59724f272e53b

diff --git a/src/core/ao_fec_tx.c b/src/core/ao_fec_tx.c
deleted file mode 100644
index 4941d745..00000000
--- a/src/core/ao_fec_tx.c
+++ /dev/null
@@ -1,134 +0,0 @@
-/*
- * Copyright © 2012 Keith Packard <keithp@keithp.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * 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; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- */
-
-#include <ao_fec.h>
-#include <stdio.h>
-
-#if AO_FEC_DEBUG
-void
-ao_fec_dump_bytes(const uint8_t *bytes, uint16_t len, const char *name)
-{
-	uint16_t	i;
-
-	printf ("%s (%d):", name, len);
-	for (i = 0; i < len; i++) {
-		if ((i & 7) == 0)
-			printf ("\n\t%02x:", i);
-		printf(" %02x", bytes[i]);
-	}
-	printf ("\n");
-}
-#endif
-
-uint16_t
-ao_fec_crc(const uint8_t *bytes, uint8_t len)
-{
-	uint16_t	crc = AO_FEC_CRC_INIT;
-
-	while (len--)
-		crc = ao_fec_crc_byte(*bytes++, crc);
-	return crc;
-}
-
-/*
- * len is the length of the data; the crc will be
- * the fist two bytes after that
- */
-
-uint8_t
-ao_fec_check_crc(const uint8_t *bytes, uint8_t len)
-{
-	uint16_t	computed_crc = ao_fec_crc(bytes, len);
-	uint16_t	received_crc = (bytes[len] << 8) | (bytes[len+1]);
-
-	return computed_crc == received_crc;
-}
-
-/*
- * Compute CRC and trellis-terminator/interleave-pad bytes
- */
-static uint8_t
-ao_fec_prepare(const uint8_t *in, uint8_t len, uint8_t *extra)
-{
-	uint16_t	crc = ao_fec_crc (in, len);
-	uint8_t		i = 0;
-	uint8_t		num_fec;
-
-	/* Append CRC */
-	extra[i++] = crc >> 8;
-	extra[i++] = crc;
-
-	/* Append FEC -- 1 byte if odd, two bytes if even */
-	num_fec = 2 - (i & 1);
-	while (num_fec--)
-		extra[i++] = AO_FEC_TRELLIS_TERMINATOR;
-	return i;
-}
-
-const uint8_t ao_fec_whiten_table[] = {
-#include "ao_whiten.h"
-};
-
-static const uint8_t ao_fec_encode_table[16] = {
-/* next 0  1	  state */
-	0, 3,	/* 000 */
-	1, 2,	/* 001 */
-	3, 0,	/* 010 */
-	2, 1,	/* 011 */
-	3, 0,	/* 100 */
-	2, 1,	/* 101 */
-	0, 3,	/* 110 */
-	1, 2	/* 111 */
-};
-
-uint8_t
-ao_fec_encode(const uint8_t *in, uint8_t len, uint8_t *out)
-{
-	uint8_t		extra[AO_FEC_PREPARE_EXTRA];
-	uint8_t 	extra_len;
-	uint32_t	encode, interleave;
-	uint8_t		pair, byte, bit;
-	uint16_t	fec = 0;
-	const uint8_t	*whiten = ao_fec_whiten_table;
-
-	extra_len = ao_fec_prepare(in, len, extra);
-	for (pair = 0; pair < len + extra_len; pair += 2) {
-		encode = 0;
-		for (byte = 0; byte < 2; byte++) {
-			if (pair + byte == len)
-				in = extra;
-			fec |= *in++ ^ *whiten++;
-			for (bit = 0; bit < 8; bit++) {
-				encode = encode << 2 | ao_fec_encode_table[fec >> 7];
-				fec = (fec << 1) & 0x7ff;
-			}
-		}
-
-		interleave = 0;
-		for (bit = 0; bit < 4 * 4; bit++) {
-			uint8_t	byte_shift = (bit & 0x3) << 3;
-			uint8_t	bit_shift = (bit & 0xc) >> 1;
-
-			interleave = (interleave << 2) | ((encode >> (byte_shift + bit_shift)) & 0x3);
-		}
-		*out++ = interleave >> 24;
-		*out++ = interleave >> 16;
-		*out++ = interleave >> 8;
-		*out++ = interleave >> 0;
-	}
-	return (len + extra_len) * 2;
-}