mirror of https://github.com/ShaYmez/MMDVM_CM.git
101 lines
3.7 KiB
C++
101 lines
3.7 KiB
C++
/*---------------------------------------------------------------------------*\
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FILE........: codec2.h
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AUTHOR......: David Rowe
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DATE CREATED: 21 August 2010
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Codec 2 fully quantised encoder and decoder functions. If you want use
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Codec 2, these are the functions you need to call.
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\*---------------------------------------------------------------------------*/
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/*
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Copyright (C) 2010 David Rowe
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All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License version 2.1, as
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published by the Free Software Foundation. This program is
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distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __CODEC2__
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#define __CODEC2__
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#include <complex>
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#include "codec2_internal.h"
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#include "defines.h"
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#include "kiss_fft.h"
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#include "nlp.h"
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#include "quantise.h"
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#define CODEC2_MODE_3200 0
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#define CODEC2_MODE_1600 2
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#ifndef CODEC2_MODE_EN_DEFAULT
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#define CODEC2_MODE_EN_DEFAULT 1
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#endif
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#define CODEC2_RAND_MAX 32767
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class CCodec2
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{
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public:
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CCodec2(bool is_3200);
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~CCodec2();
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void codec2_encode(unsigned char *bits, const short *speech_in);
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void codec2_decode(short *speech_out, const unsigned char *bits);
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void codec2_set_mode(bool);
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bool codec2_get_mode() {return (c2.mode == 3200); };
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int codec2_samples_per_frame();
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int codec2_bits_per_frame();
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private:
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// merged from other files
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void sample_phase(MODEL *model, std::complex<float> filter_phase[], std::complex<float> A[]);
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void phase_synth_zero_order(int n_samp, MODEL *model, float *ex_phase, std::complex<float> filter_phase[]);
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void postfilter(MODEL *model, float *bg_est);
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C2CONST c2const_create(int Fs, float framelength_ms);
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void make_analysis_window(C2CONST *c2const, FFT_STATE *fft_fwd_cfg, float w[], float W[]);
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void dft_speech(C2CONST *c2const, FFT_STATE &fft_fwd_cfg, std::complex<float> Sw[], float Sn[], float w[]);
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void two_stage_pitch_refinement(C2CONST *c2const, MODEL *model, std::complex<float> Sw[]);
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void estimate_amplitudes(MODEL *model, std::complex<float> Sw[], int est_phase);
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float est_voicing_mbe(C2CONST *c2const, MODEL *model, std::complex<float> Sw[], float W[]);
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void make_synthesis_window(C2CONST *c2const, float Pn[]);
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void synthesise(int n_samp, FFTR_STATE *fftr_inv_cfg, float Sn_[], MODEL *model, float Pn[], int shift);
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int codec2_rand(void);
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void hs_pitch_refinement(MODEL *model, std::complex<float> Sw[], float pmin, float pmax, float pstep);
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void interp_Wo(MODEL *interp, MODEL *prev, MODEL *next, float Wo_min);
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void interp_Wo2(MODEL *interp, MODEL *prev, MODEL *next, float weight, float Wo_min);
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float interp_energy(float prev, float next);
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void interpolate_lsp_ver2(float interp[], float prev[], float next[], float weight, int order);
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void analyse_one_frame(MODEL *model, const short *speech);
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void synthesise_one_frame(short speech[], MODEL *model, std::complex<float> Aw[], float gain);
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void codec2_encode_3200(unsigned char *bits, const short *speech);
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void codec2_encode_1600(unsigned char *bits, const short *speech);
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void codec2_decode_3200(short *speech, const unsigned char *bits);
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void codec2_decode_1600(short *speech, const unsigned char *bits);
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void ear_protection(float in_out[], int n);
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void lsp_to_lpc(float *freq, float *ak, int lpcrdr);
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void (CCodec2::*encode)(unsigned char *bits, const short *speech);
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void (CCodec2::*decode)(short *speech, const unsigned char *bits);
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Cnlp nlp;
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CQuantize qt;
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CODEC2 c2;
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};
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#endif
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