1 files changed, 83 insertions, 0 deletions
diff --git a/gr-vocoder/lib/codec2/quantise.h b/gr-vocoder/lib/codec2/quantise.h
new file mode 100644
index 000000000..90a3661ff
--- /dev/null
+++ b/gr-vocoder/lib/codec2/quantise.h
@@ -0,0 +1,83 @@
+/*---------------------------------------------------------------------------*\
+                                                                             
+  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__
+
+#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);
+
+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);
+void lspd_quantise(float lsp[], float lsp_[], int order);
+void lspdvq_quantise(float lsp[], float lsp_[], int order); 
+
+int encode_energy(float e);
+float decode_energy(int index);
+
+void encode_amplitudes(int    lsp_indexes[], 
+		       int   *energy_index,
+		       MODEL *model, 
+		       float  Sn[], 
+		       float  w[]);
+
+float decode_amplitudes(MODEL *model,
+			float  ak[],
+			int lsp_indexes[],
+			int energy_index,
+			float  lsps[],
+			float *e);
+
+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);
+
+void apply_lpc_correction(MODEL *model);
+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