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69 lines
2.8 KiB
C
69 lines
2.8 KiB
C
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/*---------------------------------------------------------------------------*\
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FILE........: quantise.h
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AUTHOR......: David Rowe
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DATE CREATED: 31/5/92
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Quantisation functions for the sinusoidal coder.
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\*---------------------------------------------------------------------------*/
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/*
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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 __QUANTISE__
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#define __QUANTISE__
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#include <complex>
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#include "qbase.h"
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class CQuantize : public CQbase {
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public:
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void aks_to_M2(FFTR_STATE *fftr_fwd_cfg, float ak[], int order, MODEL *model, float E, float *snr, int sim_pf, int pf, int bass_boost, float beta, float gamma, std::complex<float> Aw[]);
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int encode_Wo(C2CONST *c2const, float Wo, int bits);
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float decode_Wo(C2CONST *c2const, int index, int bits);
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void encode_lsps_scalar(int indexes[], float lsp[], int order);
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void decode_lsps_scalar(float lsp[], int indexes[], int order);
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void encode_lspds_scalar(int indexes[], float lsp[], int order);
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void decode_lspds_scalar(float lsp[], int indexes[], int order);
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int encode_energy(float e, int bits);
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float decode_energy(int index, int bits);
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void pack(unsigned char * bits, unsigned int *nbit, int index, unsigned int index_bits);
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void pack_natural_or_gray(unsigned char * bits, unsigned int *nbit, int index, unsigned int index_bits, unsigned int gray);
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int unpack(const unsigned char * bits, unsigned int *nbit, unsigned int index_bits);
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int unpack_natural_or_gray(const unsigned char * bits, unsigned int *nbit, unsigned int index_bits, unsigned int gray);
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int lsp_bits(int i);
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int lspd_bits(int i);
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void apply_lpc_correction(MODEL *model);
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float speech_to_uq_lsps(float lsp[], float ak[], float Sn[], float w[], int m_pitch, int order);
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int check_lsp_order(float lsp[], int lpc_order);
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void bw_expand_lsps(float lsp[], int order, float min_sep_low, float min_sep_high);
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private:
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void compute_weights(const float *x, float *w, int ndim);
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int find_nearest(const float *codebook, int nb_entries, float *x, int ndim);
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void lpc_post_filter(FFTR_STATE *fftr_fwd_cfg, float Pw[], float ak[], int order, float beta, float gamma, int bass_boost, float E);
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int lpc_to_lsp (float *a, int lpcrdr, float *freq, int nb, float delta);
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float cheb_poly_eva(float *coef,float x,int order);
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};
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#endif
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