90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
/*
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* Project 25 IMBE Encoder/Decoder Fixed-Point implementation
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* Developed by Pavel Yazev E-mail: pyazev@gmail.com
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* Version 1.0 (c) Copyright 2009
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*/
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/* -*- c++ -*- */
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#ifndef INCLUDED_IMBE_VOCODER_H
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#define INCLUDED_IMBE_VOCODER_H
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#include <stdint.h>
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#include <string.h>
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#include <imbe.h>
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#include <dsp_sub.h>
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#include <basic_op.h>
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#include <math_sub.h>
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#include <encode.h>
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#include <decode.h>
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class imbe_vocoder
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{
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public:
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imbe_vocoder(void); // constructor
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~imbe_vocoder() {} // destructor
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// imbe_encode compresses 160 samples (in unsigned int format)
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// outputs u[] vectors as frame_vector[]
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void imbe_encode(int16_t *frame_vector, int16_t *snd) {
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encode(&my_imbe_param, frame_vector, snd);
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}
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// imbe_decode decodes IMBE codewords (frame_vector),
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// outputs the resulting 160 audio samples (snd)
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void imbe_decode(int16_t *frame_vector, int16_t *snd) {
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decode(&my_imbe_param, frame_vector, snd);
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}
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private:
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IMBE_PARAM my_imbe_param;
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/* data items originally static (moved from individual c++ sources) */
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Word16 prev_pitch, prev_prev_pitch, prev_e_p, prev_prev_e_p;
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UWord32 seed ;
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Word16 num_harms_prev1;
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Word32 sa_prev1[NUM_HARMS_MAX + 2];
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Word16 num_harms_prev2;
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Word32 sa_prev2[NUM_HARMS_MAX + 2];
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Word16 uv_mem[105];
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UWord32 ph_mem[NUM_HARMS_MAX];
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Word16 num_harms_prev3;
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Word32 fund_freq_prev;
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Word16 vu_dsn_prev[NUM_HARMS_MAX];
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Word16 sa_prev3[NUM_HARMS_MAX];
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Word32 th_max;
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Word16 v_uv_dsn[NUM_BANDS_MAX];
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Word16 wr_array[FFTLENGTH / 2 + 1];
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Word16 wi_array[FFTLENGTH / 2 + 1];
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Word16 pitch_est_buf[PITCH_EST_BUF_SIZE];
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Word16 pitch_ref_buf[PITCH_EST_BUF_SIZE];
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Word32 dc_rmv_mem;
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Cmplx16 fft_buf[FFTLENGTH];
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Word16 pe_lpf_mem[PE_LPF_ORD];
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/* member functions */
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void idct(Word16 *in, Word16 m_lim, Word16 i_lim, Word16 *out);
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void dct(Word16 *in, Word16 m_lim, Word16 i_lim, Word16 *out);
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void fft_init(void);
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void fft(Word16 *datam1, Word16 nn, Word16 isign);
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void encode(IMBE_PARAM *imbe_param, Word16 *frame_vector, Word16 *snd);
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void parse(int argc, char **argv);
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void pitch_est_init(void);
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Word32 autocorr(Word16 *sigin, Word16 shift, Word16 scale_shift);
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void e_p(Word16 *sigin, Word16 *res_buf);
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void pitch_est(IMBE_PARAM *imbe_param, Word16 *frames_buf);
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void sa_decode_init(void);
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void sa_decode(IMBE_PARAM *imbe_param);
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void sa_encode_init(void);
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void sa_encode(IMBE_PARAM *imbe_param);
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void uv_synt_init(void);
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void uv_synt(IMBE_PARAM *imbe_param, Word16 *snd);
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void v_synt_init(void);
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void v_synt(IMBE_PARAM *imbe_param, Word16 *snd);
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void pitch_ref_init(void);
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Word16 voiced_sa_calc(Word32 num, Word16 den);
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Word16 unvoiced_sa_calc(Word32 num, Word16 den);
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void v_uv_det(IMBE_PARAM *imbe_param, Cmplx16 *fft_buf);
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void decode_init(IMBE_PARAM *imbe_param);
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void decode(IMBE_PARAM *imbe_param, Word16 *frame_vector, Word16 *snd);
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void encode_init(void);
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};
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#endif /* INCLUDED_IMBE_VOCODER_H */
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