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 Pathname: LT_PRED_STATUS.h 21 22 23 ------------------------------------------------------------------------------ 24 REVISION HISTORY 25 26 Description: 27 (1) Merged in #defines from ltp_common.h, thereby eliminating that file. 28 29 Description: 30 (1) Modified to include the lines... 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #ifdef __cplusplus 37 } 38 #endif 39 40 (2) Updated the copyright header. 41 42 Description: Moved large ltp_buffer up to s_tDec_Int_Chan.h, since this 43 move allowed for other elements in this structure to be shared with 44 the fxpCoef array. 45 46 Description: Decreased size of LTP buffers from 4096 to 3072. The upper 1024 47 elements in the LTP buffers were never touched in the code. This saves 48 4 kilobytes in memory. 49 50 Description: Decreased size of LTP buffers again from 3072 to 2048. This 51 time, I realized that 1024 elements were duplicated in the 32-bit array 52 pVars->pChVars[]->time_quant. Rather than copy this data EVERY frame 53 from a 32-bit to a 16-bit LTP buffer, the data is accessed only 54 when it is needed. This saves both MIPS and memory. 55 56 Who: Date: 57 Description: 58 ------------------------------------------------------------------------------ 59 INCLUDE DESCRIPTION 60 61 define LT_PRED_STATUS structure for pulse data decoding. 62 63 ------------------------------------------------------------------------------ 64 */ 65 66 /*---------------------------------------------------------------------------- 67 ; CONTINUE ONLY IF NOT ALREADY DEFINED 68 ----------------------------------------------------------------------------*/ 69 #ifndef S_LT_PRED_STATUS_H 70 #define S_LT_PRED_STATUS_H 71 72 #ifdef __cplusplus 73 extern "C" 74 { 75 #endif 76 77 /*---------------------------------------------------------------------------- 78 ; INCLUDES 79 ----------------------------------------------------------------------------*/ 80 #include "pv_audio_type_defs.h" 81 #include "e_blockswitching.h" 82 83 /*---------------------------------------------------------------------------- 84 ; MACROS 85 ; Define module specific macros here 86 ----------------------------------------------------------------------------*/ 87 88 /*---------------------------------------------------------------------------- 89 ; DEFINES 90 ; Include all pre-processor statements here. 91 ----------------------------------------------------------------------------*/ 92 /* 93 Macro: MAX_SHORT_WINDOWS 94 Purpose: Number of short windows in one long window. 95 Explanation: - */ 96 #ifndef MAX_SHORT_WINDOWS 97 #define MAX_SHORT_WINDOWS NSHORT 98 #endif 99 100 /* 101 Macro: MAX_SCFAC_BANDS 102 Purpose: Maximum number of scalefactor bands in one frame. 103 Explanation: - */ 104 #ifndef MAX_SCFAC_BANDS 105 #define MAX_SCFAC_BANDS MAXBANDS 106 #endif 107 108 /* 109 Macro: BLOCK_LEN_LONG 110 Purpose: Length of one long window 111 Explanation: - */ 112 #ifndef BLOCK_LEN_LONG 113 #define BLOCK_LEN_LONG LN2 114 #endif 115 116 117 /* 118 Macro: LTP_MAX_BLOCK_LEN_LONG 119 Purpose: Informs the routine of the maximum block size used. 120 Explanation: This is needed since the TwinVQ long window 121 is different from the AAC long window. */ 122 #define LTP_MAX_BLOCK_LEN_LONG BLOCK_LEN_LONG //(2 * BLOCK_LEN_LONG) 123 124 /* 125 Macro: LT_BLEN 126 Purpose: Length of the history buffer. 127 Explanation: Has to hold 2 long windows of time domain data. */ 128 #ifndef LT_BLEN 129 #define LT_BLEN (2 * LTP_MAX_BLOCK_LEN_LONG) 130 #endif 131 132 /*---------------------------------------------------------------------------- 133 ; EXTERNAL VARIABLES REFERENCES 134 ; Declare variables used in this module but defined elsewhere 135 ----------------------------------------------------------------------------*/ 136 137 /*---------------------------------------------------------------------------- 138 ; SIMPLE TYPEDEF'S 139 ----------------------------------------------------------------------------*/ 140 141 /*---------------------------------------------------------------------------- 142 ; ENUMERATED TYPEDEF'S 143 ----------------------------------------------------------------------------*/ 144 145 /*---------------------------------------------------------------------------- 146 ; STRUCTURES TYPEDEF'S 147 ----------------------------------------------------------------------------*/ 148 /* 149 Type: LT_PRED_STATUS 150 Purpose: Type of the struct holding the LTP encoding parameters. 151 Explanation: - */ 152 typedef struct 153 { 154 Int weight_index; 155 Int win_prediction_used[MAX_SHORT_WINDOWS]; 156 Int sfb_prediction_used[MAX_SCFAC_BANDS]; 157 Bool ltp_data_present; 158 159 Int delay[MAX_SHORT_WINDOWS]; 160 } 161 LT_PRED_STATUS; 162 163 /*---------------------------------------------------------------------------- 164 ; GLOBAL FUNCTION DEFINITIONS 165 ; Function Prototype declaration 166 ----------------------------------------------------------------------------*/ 167 168 #ifdef __cplusplus 169 } 170 #endif 171 172 #endif /* S_LT_PRED_STATUS_H */ 173 174 175
