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