Working codec2 support

2025-08-13 17:38:59 +00:00 · 2010-09-21 12:35:41 -05:00
parent 549b2356d6
commit 62b55523c2
150 changed files with 14078 additions and 3 deletions
--- a/libs/libcodec2/src/quantise.h
+++ b/libs/libcodec2/src/quantise.h
@@ -0,0 +1,84 @@
+/*---------------------------------------------------------------------------*\
+                                                                             
+  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, write to the Free Software
+  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __QUANTISE__
+#define __QUANTISE__
+
+#define WO_BITS   7
+#define WO_LEVELS (1<<WO_BITS)
+#define E_BITS    5
+#define E_LEVELS  (1<<E_BITS)
+#define E_MIN_DB -10.0
+#define E_MAX_DB  40.0
+
+void quantise_init();
+float lpc_model_amplitudes(float Sn[], float w[], MODEL *model, int order,
+			   int lsp,float ak[]);
+void aks_to_M2(float ak[], int order, MODEL *model, float E, float *snr, 
+	       int dump);
+float get_gmin(void);
+
+int   encode_Wo(float Wo);
+float decode_Wo(int index);
+
+void encode_lsps(int indexes[], float lsp[], int order);
+void decode_lsps(float lsp[], int indexes[], int order);
+
+int encode_energy(float e);
+float decode_energy(int index);
+
+void encode_amplitudes(int    lsp_indexes[], 
+		       int   *lpc_correction, 
+		       int   *energy_index,
+		       MODEL *model, 
+		       float  Sn[], 
+		       float  w[]);
+
+float decode_amplitudes(MODEL *model,
+			float  ak[],
+			int lsp_indexes[],
+			int lpc_correction, 
+			int energy_index);
+
+void pack(unsigned char * bits, unsigned int *nbit, int index, unsigned int index_bits);
+int  unpack(const unsigned char * bits, unsigned int *nbit, unsigned int index_bits);
+
+int lsp_bits(int i);
+
+int need_lpc_correction(MODEL *model, float ak[], float E);
+void apply_lpc_correction(MODEL *model, int lpc_correction);
+float speech_to_uq_lsps(float lsp[],
+			float ak[],
+		        float Sn[], 
+		        float w[],
+		        int   order
+			);
+void bw_expand_lsps(float lsp[],
+		    int   order
+		    );
+void decode_lsps(float lsp[], int indexes[], int order);
+
+#endif