altos: Rename 'core' to 'kernel'

[fw/altos] / src / core / ao_fec_tx.c

diff --git a/src/core/ao_fec_tx.c b/src/core/ao_fec_tx.c
deleted file mode 100644 (file)
index 4941d74..0000000
--- 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;
-}