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| 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 |
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