From ac7c48b4dee99d4c772f133d70d8d1b38262fcd2 Mon Sep 17 00:00:00 2001
From: Author Name <david@rowetel.com>
Date: Fri, 7 Jul 2023 12:20:59 +0930
Subject: shallow zip-file copy from codec2 e9d726bf20

---
 src/quantise.h | 107 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 src/quantise.h

(limited to 'src/quantise.h')

diff --git a/src/quantise.h b/src/quantise.h
new file mode 100644
index 0000000..acba3d9
--- /dev/null
+++ b/src/quantise.h
@@ -0,0 +1,107 @@
+/*---------------------------------------------------------------------------*\
+
+  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
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