1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 /**************************************************************************************** 19 Portions of this file are derived from the following 3GPP standard: 20 21 3GPP TS 26.073 22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 23 Available from http://www.3gpp.org 24 25 (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 26 Permission to distribute, modify and use this file under the standard license 27 terms listed above has been obtained from the copyright holder. 28 ****************************************************************************************/ 29 /* 30 ******************************************************************************** 31 * 32 * GSM AMR-NB speech codec R98 Version 7.5.0 March 2, 2001 33 * R99 Version 3.2.0 34 * REL-4 Version 4.0.0 35 * 36 ******************************************************************************** 37 * 38 * File : weight_a.h 39 * Purpose : Spectral expansion of LP coefficients. (order==10) 40 * Description : a_exp[i] = a[i] * fac[i-1] ,i=1,10 41 * 42 * 43 ******************************************************************************** 44 */ 45 #ifndef weight_a_h 46 #define weight_a_h "$Id $" 47 48 /* 49 ******************************************************************************** 50 * INCLUDE FILES 51 ******************************************************************************** 52 */ 53 #include "typedef.h" 54 55 #ifdef __cplusplus 56 extern "C" 57 { 58 #endif 59 60 /* 61 ******************************************************************************** 62 * DEFINITION OF DATA TYPES 63 ******************************************************************************** 64 */ 65 66 /* 67 ******************************************************************************** 68 * DECLARATION OF PROTOTYPES 69 ******************************************************************************** 70 */ 71 void Weight_Ai( 72 Word16 a[], /* (i) : a[m+1] LPC coefficients (m=10) */ 73 const Word16 fac[],/* (i) : Spectral expansion factors. */ 74 Word16 a_exp[] /* (o) : Spectral expanded LPC coefficients */ 75 ); 76 77 #ifdef __cplusplus 78 } 79 #endif 80 81 #endif 82
