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75 lines
2.8 KiB
C
75 lines
2.8 KiB
C
12 years ago
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/* Copyright (C) 2002 Jean-Marc Valin */
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/**
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@file quant_lsp.h
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@brief LSP vector quantization
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*/
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef QUANT_LSP_H
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#define QUANT_LSP_H
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#include <speex/speex_bits.h>
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#include "arch.h"
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#define MAX_LSP_SIZE 20
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#define NB_CDBK_SIZE 64
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#define NB_CDBK_SIZE_LOW1 64
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#define NB_CDBK_SIZE_LOW2 64
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#define NB_CDBK_SIZE_HIGH1 64
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#define NB_CDBK_SIZE_HIGH2 64
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/*Narrowband codebooks*/
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extern const signed char cdbk_nb[];
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extern const signed char cdbk_nb_low1[];
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extern const signed char cdbk_nb_low2[];
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extern const signed char cdbk_nb_high1[];
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extern const signed char cdbk_nb_high2[];
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/* Quantizes narrowband LSPs with 30 bits */
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void lsp_quant_nb(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
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/* Decodes quantized narrowband LSPs */
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void lsp_unquant_nb(spx_lsp_t *lsp, int order, SpeexBits *bits);
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/* Quantizes low bit-rate narrowband LSPs with 18 bits */
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void lsp_quant_lbr(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
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/* Decodes quantized low bit-rate narrowband LSPs */
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void lsp_unquant_lbr(spx_lsp_t *lsp, int order, SpeexBits *bits);
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/* Quantizes high-band LSPs with 12 bits */
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void lsp_quant_high(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
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/* Decodes high-band LSPs */
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void lsp_unquant_high(spx_lsp_t *lsp, int order, SpeexBits *bits);
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#endif
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