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