diff options
Diffstat (limited to 'gr-vocoder/lib/codec2/codec2_fdmdv.h')
| -rw-r--r-- | gr-vocoder/lib/codec2/codec2_fdmdv.h | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/gr-vocoder/lib/codec2/codec2_fdmdv.h b/gr-vocoder/lib/codec2/codec2_fdmdv.h deleted file mode 100644 index b7da96f629..0000000000 --- a/gr-vocoder/lib/codec2/codec2_fdmdv.h +++ /dev/null @@ -1,124 +0,0 @@ -/*---------------------------------------------------------------------------*\ - - FILE........: codec2_fdmdv.h - AUTHOR......: David Rowe - DATE CREATED: April 14 2012 - - A 1400 bit/s (nominal) Frequency Division Multiplexed Digital Voice - (FDMDV) modem. Used for digital audio over HF SSB. See - README_fdmdv.txt for more information, and fdmdv_mod.c and - fdmdv_demod.c for example usage. - - The name codec2_fdmdv.h is used to make it unique when "make - installed". - - References: - - [1] http://n1su.com/fdmdv/FDMDV_Docs_Rel_1_4b.pdf - -\*---------------------------------------------------------------------------*/ - -/* - Copyright (C) 2012 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 __FDMDV__ -#define __FDMDV__ - -#ifdef __cplusplus -extern "C" { -#endif - -/* set up the calling convention for DLL function import/export for - WIN32 cross compiling */ - -#ifdef __CODEC2_WIN32__ -#ifdef __CODEC2_BUILDING_DLL__ -#define CODEC2_WIN32SUPPORT __declspec(dllexport) __stdcall -#else -#define CODEC2_WIN32SUPPORT __declspec(dllimport) __stdcall -#endif -#else -#define CODEC2_WIN32SUPPORT -#endif - -#include "comp.h" - -#define FDMDV_NC 14 /* default number of data carriers */ -#define FDMDV_NC_MAX 20 /* maximum number of data carriers */ -#define FDMDV_BITS_PER_FRAME 28 /* 20ms frames, for nominal 1400 bit/s */ -#define FDMDV_NOM_SAMPLES_PER_FRAME 160 /* modulator output samples/frame and nominal demod samples/frame */ - /* at 8000 Hz sample rate */ -#define FDMDV_MAX_SAMPLES_PER_FRAME 200 /* max demod samples/frame, use this to allocate storage */ -#define FDMDV_SCALE 1000 /* suggested scaling for 16 bit shorts */ -#define FDMDV_FCENTRE 1500 /* Centre frequency, Nc/2 carriers below this, Nc/2 carriers above (Hz) */ - -/* 8 to 48 kHz sample rate conversion */ - -#define FDMDV_OS 6 /* oversampling rate */ -#define FDMDV_OS_TAPS 48 /* number of OS filter taps */ - -/* FFT points */ - -#define FDMDV_NSPEC 512 -#define FDMDV_MAX_F_HZ 4000 - -/* FDMDV states and stats structures */ - -struct FDMDV; - -struct FDMDV_STATS { - int Nc; - float snr_est; /* estimated SNR of rx signal in dB (3 kHz noise BW) */ - COMP rx_symbols[FDMDV_NC_MAX+1]; /* latest received symbols, for scatter plot */ - int sync; /* demod sync state */ - float foff; /* estimated freq offset in Hz */ - float rx_timing; /* estimated optimum timing offset in samples */ - float clock_offset; /* Estimated tx/rx sample clock offset in ppm */ -}; - -struct FDMDV * CODEC2_WIN32SUPPORT fdmdv_create(int Nc); -void CODEC2_WIN32SUPPORT fdmdv_destroy(struct FDMDV *fdmdv_state); -void CODEC2_WIN32SUPPORT fdmdv_use_old_qpsk_mapping(struct FDMDV *fdmdv_state); -int CODEC2_WIN32SUPPORT fdmdv_bits_per_frame(struct FDMDV *fdmdv_state); -float CODEC2_WIN32SUPPORT fdmdv_get_fsep(struct FDMDV *fdmdv_state); -void CODEC2_WIN32SUPPORT fdmdv_set_fsep(struct FDMDV *fdmdv_state, float fsep); - -void CODEC2_WIN32SUPPORT fdmdv_mod(struct FDMDV *fdmdv_state, COMP tx_fdm[], int tx_bits[], int *sync_bit); -void CODEC2_WIN32SUPPORT fdmdv_demod(struct FDMDV *fdmdv_state, int rx_bits[], int *reliable_sync_bit, COMP rx_fdm[], int *nin); - -void CODEC2_WIN32SUPPORT fdmdv_get_test_bits(struct FDMDV *fdmdv_state, int tx_bits[]); -int CODEC2_WIN32SUPPORT fdmdv_error_pattern_size(struct FDMDV *fdmdv_state); -void CODEC2_WIN32SUPPORT fdmdv_put_test_bits(struct FDMDV *f, int *sync, short error_pattern[], int *bit_errors, int *ntest_bits, int rx_bits[]); - -void CODEC2_WIN32SUPPORT fdmdv_get_demod_stats(struct FDMDV *fdmdv_state, struct FDMDV_STATS *fdmdv_stats); -void CODEC2_WIN32SUPPORT fdmdv_get_rx_spectrum(struct FDMDV *fdmdv_state, float mag_dB[], COMP rx_fdm[], int nin); - -void CODEC2_WIN32SUPPORT fdmdv_8_to_48(float out48k[], float in8k[], int n); -void CODEC2_WIN32SUPPORT fdmdv_48_to_8(float out8k[], float in48k[], int n); - -void CODEC2_WIN32SUPPORT fdmdv_freq_shift(COMP rx_fdm_fcorr[], COMP rx_fdm[], float foff, COMP *foff_rect, COMP *foff_phase_rect, int nin); - -/* debug/development function(s) */ - -void CODEC2_WIN32SUPPORT fdmdv_dump_osc_mags(struct FDMDV *f); - -#ifdef __cplusplus -} -#endif - -#endif - |