shallow zip-file copy from codec2 e9d726bf20

1 files changed, 54 insertions, 0 deletions

diff --git a/src/interldpc.h b/src/interldpc.h
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--- /dev/null
+++ b/src/interldpc.h
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+/*---------------------------------------------------------------------------*\
+
+  FILE........: interldpc.h
+  AUTHOR......: David Rowe
+  DATE CREATED: April 2018
+
+  Helper functions for interleaved LDPC modems.
+
+\*---------------------------------------------------------------------------*/
+
+/*
+  Copyright (C) 2018 David Rowe
+
+  All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License version 2.1, 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 Lesser General Public License
+  along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __INTERLDPC__
+#define __INTERLDPC__
+
+#include <stdint.h>
+
+#include "comp.h"
+#include "mpdecode_core.h"
+#include "ofdm_internal.h"
+
+/* LDPC unequal protection modes */
+#define LDPC_PROT_EQUAL 0    /* all bits in LDPC codeword used, e.g. 700D/700E */
+#define LDPC_PROT_2020  1    /* (504,396) but some data bits unused */
+#define LDPC_PROT_2020B 3    /* (112,56) but we only protect stage1 VQ in each LPCNet frame */
+
+void set_up_ldpc_constants(struct LDPC *ldpc, int code_length, int parity_bits);
+void set_data_bits_per_frame(struct LDPC *ldpc, int new_data_bits_per_frame);
+void ldpc_mode_specific_setup(struct OFDM *ofdm, struct LDPC *ldpc);
+void ldpc_encode_frame(struct LDPC *ldpc, int codeword[], unsigned char tx_bits_char[]);
+void qpsk_modulate_frame(COMP tx_symbols[], int codeword[], int n);
+void ldpc_decode_frame(struct LDPC *ldpc, int *parityCheckCount, int *iter,  uint8_t  out_char[], float llr[]);
+int count_uncoded_errors(struct LDPC *ldpc, struct OFDM_CONFIG *config, COMP codeword_symbols_de[], int crc16);
+int count_errors(uint8_t tx_bits[], uint8_t rx_bits[], int n);
+void count_errors_protection_mode(int protection_mode, int *pNerrs, int *pNcoded, uint8_t tx_bits[],
+                                  uint8_t rx_bits[], int n);
+void ofdm_ldpc_interleave_tx(struct OFDM *ofdm, struct LDPC *ldpc, complex float tx_sams[], uint8_t tx_bits[], uint8_t txt_bits[]);
+
+#endif