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 26.173 22 ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec 23 Available from http://www.3gpp.org 24 25 (C) 2007, 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 33 34 Filename: pit_shrp.cpp 35 36 Date: 05/08/2007 37 38 ------------------------------------------------------------------------------ 39 REVISION HISTORY 40 41 42 Description: 43 44 ------------------------------------------------------------------------------ 45 INPUT AND OUTPUT DEFINITIONS 46 47 int16 * x, in/out: impulse response (or algebraic code) 48 int16 pit_lag, input : pitch lag 49 int16 sharp, input : pitch sharpening factor (Q15) 50 int16 L_subfr input : subframe size 51 52 ------------------------------------------------------------------------------ 53 FUNCTION DESCRIPTION 54 55 Performs Pitch sharpening routine 56 57 ------------------------------------------------------------------------------ 58 REQUIREMENTS 59 60 61 ------------------------------------------------------------------------------ 62 REFERENCES 63 64 ------------------------------------------------------------------------------ 65 PSEUDO-CODE 66 67 ------------------------------------------------------------------------------ 68 */ 69 70 71 /*---------------------------------------------------------------------------- 72 ; INCLUDES 73 ----------------------------------------------------------------------------*/ 74 #include "pv_amr_wb_type_defs.h" 75 #include "pvamrwbdecoder_basic_op.h" 76 #include "pvamrwbdecoder_acelp.h" 77 78 /*---------------------------------------------------------------------------- 79 ; MACROS 80 ; Define module specific macros here 81 ----------------------------------------------------------------------------*/ 82 83 84 /*---------------------------------------------------------------------------- 85 ; DEFINES 86 ; Include all pre-processor statements here. Include conditional 87 ; compile variables also. 88 ----------------------------------------------------------------------------*/ 89 90 /*---------------------------------------------------------------------------- 91 ; LOCAL FUNCTION DEFINITIONS 92 ; Function Prototype declaration 93 ----------------------------------------------------------------------------*/ 94 95 /*---------------------------------------------------------------------------- 96 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS 97 ; Variable declaration - defined here and used outside this module 98 ----------------------------------------------------------------------------*/ 99 100 /*---------------------------------------------------------------------------- 101 ; EXTERNAL FUNCTION REFERENCES 102 ; Declare functions defined elsewhere and referenced in this module 103 ----------------------------------------------------------------------------*/ 104 105 /*---------------------------------------------------------------------------- 106 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 107 ; Declare variables used in this module but defined elsewhere 108 ----------------------------------------------------------------------------*/ 109 110 /*---------------------------------------------------------------------------- 111 ; FUNCTION CODE 112 ----------------------------------------------------------------------------*/ 113 114 void Pit_shrp( 115 int16 * x, /* in/out: impulse response (or algebraic code) */ 116 int16 pit_lag, /* input : pitch lag */ 117 int16 sharp, /* input : pitch sharpening factor (Q15) */ 118 int16 L_subfr /* input : subframe size */ 119 ) 120 { 121 int16 i; 122 int32 L_tmp; 123 124 for (i = pit_lag; i < L_subfr; i++) 125 { 126 L_tmp = mac_16by16_to_int32((int32)x[i] << 16, x[i - pit_lag], sharp); 127 x[i] = amr_wb_round(L_tmp); 128 129 } 130 131 return; 132 } 133
