1 files changed, 107 insertions, 0 deletions
diff --git a/src/codec2_ofdm.h b/src/codec2_ofdm.h
new file mode 100644
index 0000000..0804ba0
--- /dev/null
+++ b/src/codec2_ofdm.h
@@ -0,0 +1,107 @@
+/*---------------------------------------------------------------------------*\
+
+  FILE........: codec2_ofdm.h
+  AUTHORS.....: David Rowe & Steve Sampson
+  DATE CREATED: June 2017
+
+  External user references to the modem library.
+
+\*---------------------------------------------------------------------------*/
+
+/*
+  Copyright (C) 2017 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 CODEC2_OFDM_H
+#define CODEC2_OFDM_H
+
+/* Includes */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "comp.h"
+#include "modem_stats.h"
+
+/* Defines */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define OFDM_PEAK 16384                    /* peak level of OFDM TX signal */
+#define OFDM_CLIP (32767*0.35)             /* experimentally derived constant to reduce PAPR to about 8dB */
+
+#define UN_SYNC      0  /* Used with the ofdm_set_sync() */
+#define AUTO_SYNC    1
+#define MANUAL_SYNC  2
+
+#define AUTO_PHASE_EST   0
+#define LOCKED_PHASE_EST 1
+
+#define LOW_BW       0
+#define HIGH_BW      1
+
+struct OFDM_CONFIG;
+struct OFDM;
+
+/* create and destroy modem states */
+
+struct OFDM *ofdm_create(const struct OFDM_CONFIG * config);
+void ofdm_destroy(struct OFDM *);
+void ofdm_init_mode(char mode[], struct OFDM_CONFIG *config);
+
+/* signal processing */
+
+void ofdm_mod(struct OFDM *, COMP *, const int *);
+void ofdm_demod(struct OFDM *, int *, COMP *);
+void ofdm_demod_shorts(struct OFDM *, int *, short *, float);
+int  ofdm_sync_search(struct OFDM *, COMP *);
+int  ofdm_sync_search_shorts(struct OFDM *, short *, float);
+void ofdm_sync_state_machine(struct OFDM *, uint8_t *);
+void ofdm_sync_state_machine2(struct OFDM *, uint8_t *);
+
+/* getters */
+
+struct OFDM_CONFIG *ofdm_get_config_param(struct OFDM *ofdm);
+int ofdm_get_nin(struct OFDM *);
+int ofdm_get_samples_per_frame(struct OFDM *ofdm);
+int ofdm_get_samples_per_packet(struct OFDM *ofdm);
+int ofdm_get_max_samples_per_frame(struct OFDM *ofdm);
+int ofdm_get_bits_per_frame(struct OFDM *ofdm);
+int ofdm_get_bits_per_packet(struct OFDM *ofdm);
+int ofdm_get_phase_est_bandwidth_mode(struct OFDM *ofdm);
+
+/* option setters */
+
+void ofdm_set_verbose(struct OFDM *, int);
+void ofdm_set_timing_enable(struct OFDM *, bool);
+void ofdm_set_foff_est_enable(struct OFDM *, bool);
+void ofdm_set_phase_est_enable(struct OFDM *, bool);
+void ofdm_set_phase_est_bandwidth_mode(struct OFDM *ofdm, int val);
+void ofdm_set_off_est_hz(struct OFDM *, float);
+void ofdm_set_sync(struct OFDM *, int);
+void ofdm_set_tx_bpf(struct OFDM *, bool);
+void ofdm_set_dpsk(struct OFDM *ofdm, bool val);
+void ofdm_set_packets_per_burst(struct OFDM *ofdm, int packetsperburst);
+
+void ofdm_print_info(struct OFDM *);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif