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quant_lsp.h

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00001 /* Copyright (C) 2002 Jean-Marc Valin */
00002 /**
00003    @file quant_lsp.h
00004    @brief LSP vector quantization
00005 */
00006 /*
00007    Redistribution and use in source and binary forms, with or without
00008    modification, are permitted provided that the following conditions
00009    are met:
00010    
00011    - Redistributions of source code must retain the above copyright
00012    notice, this list of conditions and the following disclaimer.
00013    
00014    - Redistributions in binary form must reproduce the above copyright
00015    notice, this list of conditions and the following disclaimer in the
00016    documentation and/or other materials provided with the distribution.
00017    
00018    - Neither the name of the Xiph.org Foundation nor the names of its
00019    contributors may be used to endorse or promote products derived from
00020    this software without specific prior written permission.
00021    
00022    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00023    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00024    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
00025    A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
00026    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00027    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00028    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00029    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00030    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00031    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00032    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00033 */
00034 
00035 #ifndef QUANT_LSP_H
00036 #define QUANT_LSP_H
00037 
00038 #include <speex/speex_bits.h>
00039 #include "misc.h"
00040 
00041 #define MAX_LSP_SIZE 20
00042 
00043 #define NB_CDBK_SIZE 64
00044 #define NB_CDBK_SIZE_LOW1 64
00045 #define NB_CDBK_SIZE_LOW2 64
00046 #define NB_CDBK_SIZE_HIGH1 64
00047 #define NB_CDBK_SIZE_HIGH2 64
00048 
00049 /*Narrowband codebooks*/
00050 extern const signed char cdbk_nb[];
00051 extern const signed char cdbk_nb_low1[];
00052 extern const signed char cdbk_nb_low2[];
00053 extern const signed char cdbk_nb_high1[];
00054 extern const signed char cdbk_nb_high2[];
00055 
00056 /* Quantizes narrowband LSPs with 30 bits */
00057 void lsp_quant_nb(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
00058 
00059 /* Decodes quantized narrowband LSPs */
00060 void lsp_unquant_nb(spx_lsp_t *lsp, int order, SpeexBits *bits);
00061 
00062 /* Quantizes low bit-rate narrowband LSPs with 18 bits */
00063 void lsp_quant_lbr(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
00064 
00065 /* Decodes quantized low bit-rate narrowband LSPs */
00066 void lsp_unquant_lbr(spx_lsp_t *lsp, int order, SpeexBits *bits);
00067 
00068 /* Quantizes high-band LSPs with 12 bits */
00069 void lsp_quant_high(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
00070 
00071 /* Decodes high-band LSPs */
00072 void lsp_unquant_high(spx_lsp_t *lsp, int order, SpeexBits *bits);
00073 
00074 #ifdef EPIC_48K
00075 /* Quantizes narrowband LSPs with 14 bits */
00076 void lsp_quant_48k(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
00077 
00078 /* Decodes quantized narrowband LSPs (14 bits) */
00079 void lsp_unquant_48k(spx_lsp_t *lsp, int order, SpeexBits *bits);
00080 #endif
00081 
00082 
00083 #endif