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Diffstat (limited to 'src/quantise.h')
| -rw-r--r-- | src/quantise.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/src/quantise.h b/src/quantise.h new file mode 100644 index 0000000..08d5532 --- /dev/null +++ b/src/quantise.h @@ -0,0 +1,103 @@ +/*---------------------------------------------------------------------------*\ + + FILE........: quantise.h + AUTHOR......: David Rowe + DATE CREATED: 31/5/92 + + Quantisation functions for the sinusoidal coder. + +\*---------------------------------------------------------------------------*/ + +/* + 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 __QUANTISE__ +#define __QUANTISE__ + +#include "codec2_fft.h" +#include "comp.h" + +#define WO_BITS 7 +#define WO_LEVELS (1 << WO_BITS) +#define WO_DT_BITS 3 + +#define E_BITS 5 +#define E_LEVELS (1 << E_BITS) +#define E_MIN_DB -10.0 +#define E_MAX_DB 40.0 + +#define LSP_SCALAR_INDEXES 10 +#define LSPD_SCALAR_INDEXES 10 +#define LSP_PRED_VQ_INDEXES 3 + +#define WO_E_BITS 8 + +#define LPCPF_GAMMA 0.5 +#define LPCPF_BETA 0.2 + +float lpc_model_amplitudes(float Sn[], float w[], MODEL *model, int order, + int lsp, float ak[]); +void aks_to_M2(codec2_fftr_cfg fftr_fwd_cfg, float ak[], int order, + MODEL *model, float E, float *snr, int dump, int sim_pf, int pf, + int bass_boost, float beta, float gamma, COMP Aw[]); + +int encode_Wo(C2CONST *c2const, float Wo, int bits); +float decode_Wo(C2CONST *c2const, int index, int bits); +int encode_log_Wo(C2CONST *c2const, float Wo, int bits); +float decode_log_Wo(C2CONST *c2const, int index, int bits); +void encode_lsps_scalar(int indexes[], float lsp[], int order); +void decode_lsps_scalar(float lsp[], int indexes[], int order); +void encode_lspds_scalar(int indexes[], float lsp[], int order); +void decode_lspds_scalar(float lsp[], int indexes[], int order); + +void encode_lsps_vq(int *indexes, float *x, float *xq, int order); +void decode_lsps_vq(int *indexes, float *xq, int order, int stages); + +long quantise(const float *cb, float vec[], float w[], int k, int m, float *se); +void lspvq_quantise(float lsp[], float lsp_[], int order); +void lspjmv_quantise(float lsps[], float lsps_[], int order); + +void quantise_WoE(C2CONST *c2const, MODEL *model, float *e, float xq[]); +int encode_WoE(MODEL *model, float e, float xq[]); +void decode_WoE(C2CONST *c2const, MODEL *model, float *e, float xq[], int n1); + +int encode_energy(float e, int bits); +float decode_energy(int index, int bits); + +void pack(unsigned char *bits, unsigned int *nbit, int index, + unsigned int index_bits); +void pack_natural_or_gray(unsigned char *bits, unsigned int *nbit, int index, + unsigned int index_bits, unsigned int gray); +int unpack(const unsigned char *bits, unsigned int *nbit, + unsigned int index_bits); +int unpack_natural_or_gray(const unsigned char *bits, unsigned int *nbit, + unsigned int index_bits, unsigned int gray); + +int lsp_bits(int i); +int lspd_bits(int i); +int lsp_pred_vq_bits(int i); + +void apply_lpc_correction(MODEL *model); +float speech_to_uq_lsps(float lsp[], float ak[], float Sn[], float w[], + int m_pitch, int order); +int check_lsp_order(float lsp[], int lpc_order); +void bw_expand_lsps(float lsp[], int order, float min_sep_low, + float min_sep_high); +void bw_expand_lsps2(float lsp[], int order); +void locate_lsps_jnd_steps(float lsp[], int order); +float decode_amplitudes(MODEL *model, float ak[], int lsp_indexes[], + int energy_index, float lsps[], float *e); + +#endif |