third_party/speex/libspeex/quant_lsp.h

   1 /* Copyright (C) 2002 Jean-Marc Valin */
   2 /**
   3    @file quant_lsp.h
   4    @brief LSP vector quantization
   5 */
   6 /*
   7    Redistribution and use in source and binary forms, with or without
   8    modification, are permitted provided that the following conditions
   9    are met:
  10
  11    - Redistributions of source code must retain the above copyright
  12    notice, this list of conditions and the following disclaimer.
  13
  14    - Redistributions in binary form must reproduce the above copyright
  15    notice, this list of conditions and the following disclaimer in the
  16    documentation and/or other materials provided with the distribution.
  17
  18    - Neither the name of the Xiph.org Foundation nor the names of its
  19    contributors may be used to endorse or promote products derived from
  20    this software without specific prior written permission.
  21
  22    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  25    A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  26    CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  27    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  28    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  29    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  30    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  31    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  32    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  33 */
  34
  35 #ifndef QUANT_LSP_H
  36 #define QUANT_LSP_H
  37
  38 #include <speex/speex_bits.h>
  39 #include "arch.h"
  40
  41 #define MAX_LSP_SIZE 20
  42
  43 #define NB_CDBK_SIZE 64
  44 #define NB_CDBK_SIZE_LOW1 64
  45 #define NB_CDBK_SIZE_LOW2 64
  46 #define NB_CDBK_SIZE_HIGH1 64
  47 #define NB_CDBK_SIZE_HIGH2 64
  48
  49 /*Narrowband codebooks*/
  50 extern const signed char cdbk_nb[];
  51 extern const signed char cdbk_nb_low1[];
  52 extern const signed char cdbk_nb_low2[];
  53 extern const signed char cdbk_nb_high1[];
  54 extern const signed char cdbk_nb_high2[];
  55
  56 /* Quantizes narrowband LSPs with 30 bits */
  57 void lsp_quant_nb(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
  58
  59 /* Decodes quantized narrowband LSPs */
  60 void lsp_unquant_nb(spx_lsp_t *lsp, int order, SpeexBits *bits);
  61
  62 /* Quantizes low bit-rate narrowband LSPs with 18 bits */
  63 void lsp_quant_lbr(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
  64
  65 /* Decodes quantized low bit-rate narrowband LSPs */
  66 void lsp_unquant_lbr(spx_lsp_t *lsp, int order, SpeexBits *bits);
  67
  68 /* Quantizes high-band LSPs with 12 bits */
  69 void lsp_quant_high(spx_lsp_t *lsp, spx_lsp_t *qlsp, int order, SpeexBits *bits);
  70
  71 /* Decodes high-band LSPs */
  72 void lsp_unquant_high(spx_lsp_t *lsp, int order, SpeexBits *bits);
  73
  74 #endif