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: window_block_fxp.h 21 22 23 ------------------------------------------------------------------------------ 24 REVISION HISTORY 25 26 Description: 27 modified function definition: Time_data from Int to Int32 28 change wnd_shape from structure to passing parameters 29 delete definition of wnd_shape1, not needed. 30 31 Description: Modified based on unit test comments 32 33 Description: Change copyright, add () around constants. 34 35 Description: 36 changed Long_Window_fxp and Short _Window_fxp tables definition, from 37 "const UInt16 *" to "const UInt16 * const" to avoid global variable 38 definition. 39 40 Description: Updated function trans4m_freq_2_time_fxp definition 41 42 Description: Modified function interface to add output_buffer 43 44 45 Description: 46 47 ------------------------------------------------------------------------------ 48 INCLUDE DESCRIPTION 49 50 Header file for window and block switch 51 52 53 ------------------------------------------------------------------------------ 54 REFERENCES 55 56 (1) ISO/IEC 13818-7 Part 7: Advanced Audo Coding (AAC) 57 58 59 (2) MPEG-2 NBC Audio Decoder 60 "This software module was originally developed by AT&T, Dolby 61 Laboratories, Fraunhofer Gesellschaft IIS in the course of development 62 of the MPEG-2 NBC/MPEG-4 Audio standard ISO/IEC 13818-7, 14496-1,2 and 63 3. This software module is an implementation of a part of one or more 64 MPEG-2 NBC/MPEG-4 Audio tools as specified by the MPEG-2 NBC/MPEG-4 65 Audio standard. ISO/IEC gives users of the MPEG-2 NBC/MPEG-4 Audio 66 standards free license to this software module or modifications thereof 67 for use in hardware or software products claiming conformance to the 68 MPEG-2 NBC/MPEG-4 Audio standards. Those intending to use this software 69 module in hardware or software products are advised that this use may 70 infringe existing patents. The original developer of this software 71 module and his/her company, the subsequent editors and their companies, 72 and ISO/IEC have no liability for use of this software module or 73 modifications thereof in an implementation. Copyright is not released 74 for non MPEG-2 NBC/MPEG-4 Audio conforming products.The original 75 developer retains full right to use the code for his/her own purpose, 76 assign or donate the code to a third party and to inhibit third party 77 from using the code for non MPEG-2 NBC/MPEG-4 Audio conforming products. 78 This copyright notice must be included in all copies or derivative 79 works." 80 Copyright(c)1996. 81 82 ------------------------------------------------------------------------------ 83 */ 84 85 /*---------------------------------------------------------------------------- 86 ; CONTINUE ONLY IF NOT ALREADY DEFINED 87 ----------------------------------------------------------------------------*/ 88 #ifndef WINDOW_BLOCK_FXP_H 89 #define WINDOW_BLOCK_FXP_H 90 91 92 /*---------------------------------------------------------------------------- 93 ; INCLUDES 94 ----------------------------------------------------------------------------*/ 95 #include "pv_audio_type_defs.h" 96 #include "e_window_shape.h" 97 #include "e_window_sequence.h" 98 99 /*---------------------------------------------------------------------------- 100 ; MACROS 101 ; Define module specific macros here 102 ----------------------------------------------------------------------------*/ 103 #ifdef __cplusplus 104 extern "C" 105 { 106 #endif 107 108 /*---------------------------------------------------------------------------- 109 ; DEFINES 110 ; Include all pre-processor statements here. 111 ----------------------------------------------------------------------------*/ 112 #define LONG_WINDOW (1024) 113 #define SHORT_WINDOW (128) 114 115 #define HALF_LONG_WINDOW (LONG_WINDOW>>1) 116 #define HALF_SHORT_WINDOW (SHORT_WINDOW>>1) 117 118 #define NUM_SHORT_WINDOWS (8) 119 #define LONG_WINDOW_m_1 (LONG_WINDOW-1) 120 #define SHORT_WINDOW_m_1 (SHORT_WINDOW-1) 121 122 /* 123 * Limits for window sequences, they are used to build 124 * each long window, they are defined in the standards 125 */ 126 #define W_L_START_1 ((3*LONG_WINDOW - SHORT_WINDOW)>>1) 127 #define W_L_START_2 ((3*LONG_WINDOW + SHORT_WINDOW)>>1) 128 #define W_L_STOP_1 ((LONG_WINDOW - SHORT_WINDOW)>>1) 129 #define W_L_STOP_2 ((LONG_WINDOW + SHORT_WINDOW)>>1) 130 131 132 #define LONG_BLOCK1 (2*LONG_WINDOW) 133 #define SHORT_BLOCK1 (2*SHORT_WINDOW) 134 135 136 #define SCALING 10 137 #define ROUNDING (1<<(SCALING-1)) 138 139 140 /*---------------------------------------------------------------------------- 141 ; EXTERNAL VARIABLES REFERENCES 142 ; Declare variables used in this module but defined elsewhere 143 ----------------------------------------------------------------------------*/ 144 extern const Int16 Short_Window_KBD_fxp[ SHORT_WINDOW]; 145 extern const Int16 Long_Window_KBD_fxp[ LONG_WINDOW]; 146 extern const Int16 Short_Window_sine_fxp[ SHORT_WINDOW]; 147 extern const Int16 Long_Window_sine_fxp[ LONG_WINDOW]; 148 149 extern const Int16 * const Long_Window_fxp[]; 150 extern const Int16 * const Short_Window_fxp[]; 151 152 /*---------------------------------------------------------------------------- 153 ; SIMPLE TYPEDEF'S 154 ----------------------------------------------------------------------------*/ 155 156 /*---------------------------------------------------------------------------- 157 ; ENUMERATED TYPEDEF'S 158 ----------------------------------------------------------------------------*/ 159 160 161 162 /*---------------------------------------------------------------------------- 163 ; STRUCTURES TYPEDEF'S 164 ----------------------------------------------------------------------------*/ 165 166 /*---------------------------------------------------------------------------- 167 ; GLOBAL FUNCTION DEFINITIONS 168 ; Function Prototype declaration 169 ----------------------------------------------------------------------------*/ 170 171 void trans4m_freq_2_time_fxp( 172 Int32 Frequency_data[], 173 Int32 Time_data[], 174 #ifdef AAC_PLUS 175 Int32 Output_buffer[], 176 #else 177 Int16 Output_buffer[], 178 #endif 179 WINDOW_SEQUENCE wnd_seq, 180 Int wnd_shape_prev_bk, 181 Int wnd_shape_this_bk, 182 Int Q_format, 183 Int32 abs_max_per_window[], 184 Int32 freq_2_time_buffer[] , 185 Int16 *Interleave_output 186 ); 187 188 189 190 void trans4m_freq_2_time_fxp_1( 191 Int32 Frequency_data[], 192 Int32 Time_data[], 193 Int16 Output_buffer[], 194 WINDOW_SEQUENCE wnd_seq, 195 Int wnd_shape_prev_bk, 196 Int wnd_shape_this_bk, 197 Int Q_format, 198 Int32 abs_max_per_window[], 199 Int32 freq_2_time_buffer[] 200 ); 201 202 203 void trans4m_freq_2_time_fxp_2( 204 Int32 Frequency_data[], 205 Int32 Time_data[], 206 WINDOW_SEQUENCE wnd_seq, 207 Int wnd_shape_prev_bk, 208 Int wnd_shape_this_bk, 209 Int Q_format, 210 Int32 abs_max_per_window[], 211 Int32 freq_2_time_buffer[] , 212 Int16 *Interleave_output 213 ); 214 215 void trans4m_time_2_freq_fxp( 216 Int32 Time2Freq_data[], 217 WINDOW_SEQUENCE wnd_seq, 218 Int wnd_shape_prev_bk, 219 Int wnd_shape_this_bk, 220 Int *pQ_format, 221 Int32 mem_4_in_place_FFT[]); 222 223 /*---------------------------------------------------------------------------- 224 ; END 225 ----------------------------------------------------------------------------*/ 226 #ifdef __cplusplus 227 } 228 #endif 229 230 #endif /* WINDOW_BLOCK_FXP_H */ 231 232
