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 Pathname: ./c/include/normalize_amr_wb.h 35 36 Date: 12/10/2004 37 38 ------------------------------------------------------------------------------ 39 REVISION HISTORY 40 41 Description: 42 ------------------------------------------------------------------------------ 43 INCLUDE DESCRIPTION 44 45 ------------------------------------------------------------------------------ 46 */ 47 48 #ifndef NORMALIZE_AMR_WB_H 49 #define NORMALIZE_AMR_WB_H 50 51 52 /*---------------------------------------------------------------------------- 53 ; INCLUDES 54 ----------------------------------------------------------------------------*/ 55 56 #include "pv_amr_wb_type_defs.h" 57 58 /*---------------------------------------------------------------------------- 59 ; MACROS 60 ; Define module specific macros here 61 ----------------------------------------------------------------------------*/ 62 63 /*---------------------------------------------------------------------------- 64 ; EXTERNAL VARIABLES REFERENCES 65 ----------------------------------------------------------------------------*/ 66 67 /*---------------------------------------------------------------------------- 68 ; DEFINES AND SIMPLE TYPEDEF'S 69 ----------------------------------------------------------------------------*/ 70 71 #if defined(PV_ARM_V5) 72 73 __inline int16 normalize_amr_wb(int32 x) 74 { 75 int32 y; 76 __asm 77 { 78 clz y, x; 79 sub y, y, #1 80 } 81 return (y); 82 } 83 84 85 #elif defined(PV_ARM_GCC_V5) 86 87 88 __inline int16 normalize_amr_wb(int32 x) 89 { 90 register int32 y; 91 register int32 ra = x; 92 93 94 asm volatile( 95 "clz %0, %1\n\t" 96 "sub %0, %0, #1" 97 : "=&r*i"(y) 98 : "r"(ra)); 99 return (y); 100 101 } 102 103 #else 104 105 #ifdef __cplusplus 106 extern "C" 107 { 108 #endif 109 110 int16 normalize_amr_wb(int32 x); 111 112 #ifdef __cplusplus 113 } 114 #endif 115 116 #endif 117 118 119 120 #endif /* PV_NORMALIZE_H */ 121
