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 ------------------------------------------------------------------------------ 20 PacketVideo Corp. 21 MP3 Decoder Library 22 23 Filename: pvmp3_decode_header.h 24 25 Date: 09/21/2007 26 27 ------------------------------------------------------------------------------ 28 REVISION HISTORY 29 30 Description: 31 32 ------------------------------------------------------------------------------ 33 INCLUDE DESCRIPTION 34 35 ------------------------------------------------------------------------------ 36 */ 37 38 /*---------------------------------------------------------------------------- 39 ; CONTINUE ONLY IF NOT ALREADY DEFINED 40 ----------------------------------------------------------------------------*/ 41 #ifndef PVMP3_POLYPHASE_FILTER_WINDOW_H 42 #define PVMP3_POLYPHASE_FILTER_WINDOW_H 43 44 /*---------------------------------------------------------------------------- 45 ; INCLUDES 46 ----------------------------------------------------------------------------*/ 47 48 #include "pvmp3_audio_type_defs.h" 49 #include "s_tmp3dec_chan.h" 50 51 /*---------------------------------------------------------------------------- 52 ; MACROS 53 ; Define module specific macros here 54 ----------------------------------------------------------------------------*/ 55 56 /*---------------------------------------------------------------------------- 57 ; DEFINES 58 ; Include all pre-processor statements here. 59 ----------------------------------------------------------------------------*/ 60 #define MAX_16BITS_INT 0x7FFF 61 62 /*---------------------------------------------------------------------------- 63 ; EXTERNAL VARIABLES REFERENCES 64 ; Declare variables used in this module but defined elsewhere 65 ----------------------------------------------------------------------------*/ 66 67 /*---------------------------------------------------------------------------- 68 ; SIMPLE TYPEDEF'S 69 ----------------------------------------------------------------------------*/ 70 71 /*---------------------------------------------------------------------------- 72 ; ENUMERATED TYPEDEF'S 73 ----------------------------------------------------------------------------*/ 74 75 /*---------------------------------------------------------------------------- 76 ; STRUCTURES TYPEDEF'S 77 ----------------------------------------------------------------------------*/ 78 79 /*---------------------------------------------------------------------------- 80 ; GLOBAL FUNCTION DEFINITIONS 81 ; Function Prototype declaration 82 ----------------------------------------------------------------------------*/ 83 84 #ifdef __cplusplus 85 extern "C" 86 { 87 #endif 88 89 90 #if (defined(PV_ARM_V5)||defined(PV_ARM_V4)) 91 92 93 __inline int16 saturate16(int32 sample) 94 { 95 int32 a; 96 int32 b = 31; 97 __asm 98 { 99 mov a, sample, asr#15 100 teq a, sample, asr b 101 eorne sample, MAX_16BITS_INT, sample, asr#31 102 } 103 return sample ; 104 } 105 106 #else 107 108 inline int16 saturate16(int32 sample) 109 { 110 111 if ((sample >> 15) ^(sample >> 31)) 112 { 113 sample = MAX_16BITS_INT ^(sample >> 31); 114 } 115 return sample; 116 117 } 118 #endif 119 120 121 void pvmp3_polyphase_filter_window(int32 *synth_buffer, 122 int16 *outPcm, 123 int32 numChannels); 124 125 126 #ifdef __cplusplus 127 } 128 #endif 129 130 /*---------------------------------------------------------------------------- 131 ; END 132 ----------------------------------------------------------------------------*/ 133 #endif 134 135 136 137 138 139
