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: ./src/sfb.c 21 22 23 ------------------------------------------------------------------------------ 24 REVISION HISTORY 25 26 Description: created to define the scalefactor bands for all sampling rates 27 28 Description: Change short to Int16 29 30 Description: Modified structure to avoid assigning addresses to constant 31 tables. This solve linking problem when using the 32 /ropi option (Read-only position independent) for some 33 compilers 34 - Eliminated redundant vector sfb_96_128. 35 - Eliminated references to contant vector addresses in 36 samp_rate_info 37 38 Who: Date: 39 Description: 40 41 ------------------------------------------------------------------------------ 42 INPUT AND OUTPUT DEFINITIONS 43 44 Inputs: 45 46 Local Stores/Buffers/Pointers Needed: 47 48 Global Stores/Buffers/Pointers Needed: 49 50 Outputs: 51 52 Pointers and Buffers Modified: 53 54 55 Local Stores Modified: 56 57 Global Stores Modified: 58 59 ------------------------------------------------------------------------------ 60 FUNCTION DESCRIPTION 61 62 This function defines the scalefactor bands for all sampling rates 63 64 ------------------------------------------------------------------------------ 65 REQUIREMENTS 66 67 68 ------------------------------------------------------------------------------ 69 REFERENCES 70 71 (1) ISO/IEC 14496-3: 1999(E) 72 Subpart 4 p66 (sfb tables) 73 p111 (4.6.10) 74 p200 (Annex 4.B.5) 75 76 ------------------------------------------------------------------------------ 77 PSEUDO-CODE 78 79 ------------------------------------------------------------------------------ 80 RESOURCES USED 81 When the code is written for a specific target processor the 82 the resources used should be documented below. 83 84 STACK USAGE: [stack count for this module] + [variable to represent 85 stack usage for each subroutine called] 86 87 where: [stack usage variable] = stack usage for [subroutine 88 name] (see [filename].ext) 89 90 DATA MEMORY USED: x words 91 92 PROGRAM MEMORY USED: x words 93 94 CLOCK CYCLES: [cycle count equation for this module] + [variable 95 used to represent cycle count for each subroutine 96 called] 97 98 where: [cycle count variable] = cycle count for [subroutine 99 name] (see [filename].ext) 100 101 ------------------------------------------------------------------------------ 102 */ 103 104 105 /*---------------------------------------------------------------------------- 106 ; INCLUDES 107 ----------------------------------------------------------------------------*/ 108 #include "pv_audio_type_defs.h" 109 #include "sfb.h" 110 111 /*---------------------------------------------------------------------------- 112 ; MACROS 113 ; Define module specific macros here 114 ----------------------------------------------------------------------------*/ 115 116 /*---------------------------------------------------------------------------- 117 ; DEFINES 118 ; Include all pre-processor statements here. Include conditional 119 ; compile variables also. 120 ----------------------------------------------------------------------------*/ 121 122 /*---------------------------------------------------------------------------- 123 ; LOCAL FUNCTION DEFINITIONS 124 ; Function Prototype declaration 125 ----------------------------------------------------------------------------*/ 126 127 /*---------------------------------------------------------------------------- 128 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS 129 ; Variable declaration - defined here and used outside this module 130 ----------------------------------------------------------------------------*/ 131 const Int16 sfb_96_1024[] = 132 { 133 4, 8, 12, 16, 20, 24, 28, 134 32, 36, 40, 44, 48, 52, 56, 135 64, 72, 80, 88, 96, 108, 120, 136 132, 144, 156, 172, 188, 212, 240, 137 276, 320, 384, 448, 512, 576, 640, 138 704, 768, 832, 896, 960, 1024 139 }; /* 41 scfbands */ 140 141 const Int16 sfb_64_1024[] = 142 { 143 4, 8, 12, 16, 20, 24, 28, 144 32, 36, 40, 44, 48, 52, 56, 145 64, 72, 80, 88, 100, 112, 124, 146 140, 156, 172, 192, 216, 240, 268, 147 304, 344, 384, 424, 464, 504, 544, 148 584, 624, 664, 704, 744, 784, 824, 149 864, 904, 944, 984, 1024 150 }; /* 41 scfbands 47 */ 151 152 const Int16 sfb_64_128[] = 153 { 154 4, 8, 12, 16, 20, 24, 32, 155 40, 48, 64, 92, 128 156 }; /* 12 scfbands */ 157 158 159 const Int16 sfb_48_1024[] = 160 { 161 4, 8, 12, 16, 20, 24, 28, 162 32, 36, 40, 48, 56, 64, 72, 163 80, 88, 96, 108, 120, 132, 144, 164 160, 176, 196, 216, 240, 264, 292, 165 320, 352, 384, 416, 448, 480, 512, 166 544, 576, 608, 640, 672, 704, 736, 167 768, 800, 832, 864, 896, 928, 1024 168 }; 169 /* 49 scfbands*/ 170 171 const Int16 sfb_48_128[] = 172 { 173 4, 8, 12, 16, 20, 28, 36, 174 44, 56, 68, 80, 96, 112, 128 175 }; /* 14 scfbands */ 176 177 const Int16 sfb_32_1024[] = 178 { 179 4, 8, 12, 16, 20, 24, 28, 180 32, 36, 40, 48, 56, 64, 72, 181 80, 88, 96, 108, 120, 132, 144, 182 160, 176, 196, 216, 240, 264, 292, 183 320, 352, 384, 416, 448, 480, 512, 184 544, 576, 608, 640, 672, 704, 736, 185 768, 800, 832, 864, 896, 928, 960, 186 992, 1024 187 }; /* 51 scfbands */ 188 189 const Int16 sfb_24_1024[] = 190 { 191 4, 8, 12, 16, 20, 24, 28, 192 32, 36, 40, 44, 52, 60, 68, 193 76, 84, 92, 100, 108, 116, 124, 194 136, 148, 160, 172, 188, 204, 220, 195 240, 260, 284, 308, 336, 364, 396, 196 432, 468, 508, 552, 600, 652, 704, 197 768, 832, 896, 960, 1024 198 }; /* 47 scfbands */ 199 200 const Int16 sfb_24_128[] = 201 { 202 4, 8, 12, 16, 20, 24, 28, 203 36, 44, 52, 64, 76, 92, 108, 204 128 205 }; /* 15 scfbands */ 206 207 const Int16 sfb_16_1024[] = 208 { 209 8, 16, 24, 32, 40, 48, 56, 210 64, 72, 80, 88, 100, 112, 124, 211 136, 148, 160, 172, 184, 196, 212, 212 228, 244, 260, 280, 300, 320, 344, 213 368, 396, 424, 456, 492, 532, 572, 214 616, 664, 716, 772, 832, 896, 960, 215 1024 216 }; /* 43 scfbands */ 217 218 const Int16 sfb_16_128[] = 219 { 220 4, 8, 12, 16, 20, 24, 28, 221 32, 40, 48, 60, 72, 88, 108, 222 128 223 }; /* 15 scfbands */ 224 225 const Int16 sfb_8_1024[] = 226 { 227 12, 24, 36, 48, 60, 72, 84, 228 96, 108, 120, 132, 144, 156, 172, 229 188, 204, 220, 236, 252, 268, 288, 230 308, 328, 348, 372, 396, 420, 448, 231 476, 508, 544, 580, 620, 664, 712, 232 764, 820, 880, 944, 1024 233 }; /* 40 scfbands */ 234 235 const Int16 sfb_8_128[] = 236 { 237 4, 8, 12, 16, 20, 24, 28, 238 36, 44, 52, 60, 72, 88, 108, 239 128 240 }; /* 15 scfbands */ 241 242 const SR_Info samp_rate_info[12] = 243 { 244 /* sampling_frequency, #long sfb, #short sfb */ 245 /* samp_rate, nsfb1024, nsfb128 */ 246 {96000, 41, 12}, /* 96000 */ 247 {88200, 41, 12}, /* 88200 */ 248 {64000, 47, 12}, /* 64000 */ 249 {48000, 49, 14}, /* 48000 */ 250 {44100, 49, 14}, /* 44100 */ 251 {32000, 51, 14}, /* 32000 */ 252 {24000, 47, 15}, /* 24000 */ 253 {22050, 47, 15}, /* 22050 */ 254 {16000, 43, 15}, /* 16000 */ 255 {12000, 43, 15}, /* 12000 */ 256 {11025, 43, 15}, /* 11025 */ 257 { 8000, 40, 15}, /* 8000 */ 258 }; 259 260 261 /*---------------------------------------------------------------------------- 262 ; EXTERNAL FUNCTION REFERENCES 263 ; Declare functions defined elsewhere and referenced in this module 264 ----------------------------------------------------------------------------*/ 265 266 /*---------------------------------------------------------------------------- 267 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 268 ; Declare variables used in this module but defined elsewhere 269 ----------------------------------------------------------------------------*/ 270 271 /*---------------------------------------------------------------------------- 272 ; FUNCTION CODE 273 ----------------------------------------------------------------------------*/ 274 275 276
