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 Filename: mdst.c 21 22 ------------------------------------------------------------------------------ 23 REVISION HISTORY 24 25 26 Who: Date: MM/DD/YYYY 27 Description: 28 29 ------------------------------------------------------------------------------ 30 INPUT AND OUTPUT DEFINITIONS 31 32 Int32 x 32-bit integer input length 64 33 34 35 ------------------------------------------------------------------------------ 36 FUNCTION DESCRIPTION 37 38 mdst 39 40 ------------------------------------------------------------------------------ 41 REQUIREMENTS 42 43 44 ------------------------------------------------------------------------------ 45 REFERENCES 46 47 ------------------------------------------------------------------------------ 48 PSEUDO-CODE 49 50 ------------------------------------------------------------------------------ 51 */ 52 53 54 /*---------------------------------------------------------------------------- 55 ; INCLUDES 56 ----------------------------------------------------------------------------*/ 57 58 #ifdef AAC_PLUS 59 60 #include "pv_audio_type_defs.h" 61 #include "synthesis_sub_band.h" 62 #include "dct16.h" 63 #include "dct64.h" 64 #include "mdst.h" 65 66 #ifdef HQ_SBR 67 68 69 /*---------------------------------------------------------------------------- 70 ; MACROS 71 ; Define module specific macros here 72 ----------------------------------------------------------------------------*/ 73 74 75 /*---------------------------------------------------------------------------- 76 ; DEFINES 77 ; Include all pre-processor statements here. Include conditional 78 ; compile variables also. 79 ----------------------------------------------------------------------------*/ 80 81 #include "fxp_mul32.h" 82 #include "dst32.h" 83 84 85 #define Qfmt1(a) (Int32)(a*0x7FFFFFFF + (a>=0?0.5F:-0.5F)) 86 #define Qfmt(a) (Int32)(a*((Int32)1<<27) + (a>=0?0.5F:-0.5F)) 87 88 const Int32 CosTable_32[32] = 89 { 90 Qfmt1(0.50015063602065F), Qfmt1(0.50135845244641F), 91 Qfmt1(0.50378872568104F), Qfmt1(0.50747117207256F), 92 Qfmt1(0.51245147940822F), Qfmt1(0.51879271310533F), 93 Qfmt1(0.52657731515427F), Qfmt1(0.53590981690799F), 94 Qfmt1(0.54692043798551F), Qfmt1(0.55976981294708F), 95 Qfmt1(0.57465518403266F), Qfmt1(0.59181853585742F), 96 Qfmt1(0.61155734788251F), Qfmt1(0.63423893668840F), 97 Qfmt1(0.66031980781371F), Qfmt1(0.69037212820021F), 98 Qfmt1(0.72512052237720F), Qfmt1(0.76549416497309F), 99 Qfmt1(0.81270209081449F), Qfmt1(0.86834471522335F), 100 Qfmt(0.93458359703641F), Qfmt(1.01440826499705F), 101 Qfmt(1.11207162057972F), Qfmt(1.23383273797657F), 102 Qfmt(1.38929395863283F), Qfmt(1.59397228338563F), 103 Qfmt(1.87467598000841F), Qfmt(2.28205006800516F), 104 Qfmt(2.92462842815822F), Qfmt(4.08461107812925F), 105 Qfmt(6.79675071167363F), Qfmt(10.18693908361573F) 106 }; 107 108 109 110 /*---------------------------------------------------------------------------- 111 ; LOCAL FUNCTION DEFINITIONS 112 ; Function Prototype declaration 113 ----------------------------------------------------------------------------*/ 114 115 /*---------------------------------------------------------------------------- 116 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS 117 ; Variable declaration - defined here and used outside this module 118 ----------------------------------------------------------------------------*/ 119 120 /*---------------------------------------------------------------------------- 121 ; EXTERNAL FUNCTION REFERENCES 122 ; Declare functions defined elsewhere and referenced in this module 123 ----------------------------------------------------------------------------*/ 124 125 /*---------------------------------------------------------------------------- 126 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 127 ; Declare variables used in this module but defined elsewhere 128 ----------------------------------------------------------------------------*/ 129 130 /*---------------------------------------------------------------------------- 131 ; FUNCTION CODE 132 ----------------------------------------------------------------------------*/ 133 134 /*---------------------------------------------------------------------------- 135 ; mdst_32 136 ----------------------------------------------------------------------------*/ 137 138 void mdst_32(Int32 vec[], Int32 scratch_mem[]) 139 { 140 141 Int i; 142 const Int32 *pt_cos = CosTable_32; 143 Int32 *pt_vec = vec; 144 Int32 tmp1; 145 Int32 tmp2; 146 147 148 149 Int32 tmp3; 150 151 tmp3 = *(pt_vec++); 152 tmp2 = *(pt_vec); 153 154 for (i = 5; i != 0; i--) 155 { 156 *(pt_vec++) += tmp3; 157 tmp1 = *(pt_vec); 158 *(pt_vec++) += tmp2; 159 tmp3 = *(pt_vec); 160 *(pt_vec++) += tmp1; 161 tmp2 = *(pt_vec); 162 *(pt_vec++) += tmp3; 163 tmp1 = *(pt_vec); 164 *(pt_vec++) += tmp2; 165 tmp3 = *(pt_vec); 166 *(pt_vec++) += tmp1; 167 tmp2 = *(pt_vec); 168 } 169 170 *(pt_vec) += tmp3; 171 172 dst_32(vec, scratch_mem); 173 174 pt_vec = vec; 175 176 for (i = 5; i != 0; i--) 177 { 178 *(pt_vec) = fxp_mul32_Q31((*(pt_vec) << 1) + tmp2, *(pt_cos++)); 179 pt_vec++; 180 *(pt_vec) = fxp_mul32_Q31((*(pt_vec) << 1) - tmp2, *(pt_cos++)); 181 pt_vec++; 182 *(pt_vec) = fxp_mul32_Q31((*(pt_vec) << 1) + tmp2, *(pt_cos++)); 183 pt_vec++; 184 *(pt_vec) = fxp_mul32_Q31((*(pt_vec) << 1) - tmp2, *(pt_cos++)); 185 pt_vec++; 186 } 187 188 tmp2 >>= 1; 189 for (i = 3; i != 0; i--) 190 { 191 *(pt_vec) = fxp_mul32_Q27((*(pt_vec) + tmp2), *(pt_cos++)); 192 pt_vec++; 193 *(pt_vec) = fxp_mul32_Q27((*(pt_vec) - tmp2), *(pt_cos++)); 194 pt_vec++; 195 *(pt_vec) = fxp_mul32_Q27((*(pt_vec) + tmp2), *(pt_cos++)); 196 pt_vec++; 197 *(pt_vec) = fxp_mul32_Q27((*(pt_vec) - tmp2), *(pt_cos++)); 198 pt_vec++; 199 } 200 201 *(pt_vec - 1) <<= 1; 202 203 } 204 205 206 207 /*---------------------------------------------------------------------------- 208 ; mdct_32 209 ----------------------------------------------------------------------------*/ 210 211 void mdct_32(Int32 vec[]) 212 { 213 Int i; 214 Int32 *pt_vec = vec; 215 Int32 tmp1, tmp2; 216 217 218 const Int32 *pt_CosTable = CosTable_32; 219 220 221 for (i = 5; i != 0; i--) 222 { 223 *(pt_vec) = fxp_mul32_Q31(*(pt_vec) << 1, *(pt_CosTable++)); 224 pt_vec++; 225 *(pt_vec) = fxp_mul32_Q31(*(pt_vec) << 1, *(pt_CosTable++)); 226 pt_vec++; 227 *(pt_vec) = fxp_mul32_Q31(*(pt_vec) << 1, *(pt_CosTable++)); 228 pt_vec++; 229 *(pt_vec) = fxp_mul32_Q31(*(pt_vec) << 1, *(pt_CosTable++)); 230 pt_vec++; 231 } 232 for (i = 3; i != 0; i--) 233 { 234 *(pt_vec) = fxp_mul32_Q27(*(pt_vec), *(pt_CosTable++)); 235 pt_vec++; 236 *(pt_vec) = fxp_mul32_Q27(*(pt_vec), *(pt_CosTable++)); 237 pt_vec++; 238 *(pt_vec) = fxp_mul32_Q27(*(pt_vec), *(pt_CosTable++)); 239 pt_vec++; 240 *(pt_vec) = fxp_mul32_Q27(*(pt_vec), *(pt_CosTable++)); 241 pt_vec++; 242 } 243 *(pt_vec - 1) <<= 1; 244 245 246 dct_32(vec); 247 248 249 pt_vec = &vec[31]; 250 251 tmp1 = *(pt_vec--); 252 253 for (i = 5; i != 0; i--) 254 { 255 tmp2 = *(pt_vec); 256 *(pt_vec--) += tmp1; 257 tmp1 = *(pt_vec); 258 *(pt_vec--) += tmp2; 259 tmp2 = *(pt_vec); 260 *(pt_vec--) += tmp1; 261 tmp1 = *(pt_vec); 262 *(pt_vec--) += tmp2; 263 tmp2 = *(pt_vec); 264 *(pt_vec--) += tmp1; 265 tmp1 = *(pt_vec); 266 *(pt_vec--) += tmp2; 267 } 268 269 *(pt_vec) += tmp1; 270 271 } 272 273 #endif /* HQ_SBR */ 274 275 276 /*---------------------------------------------------------------------------- 277 ; dct_32 278 ----------------------------------------------------------------------------*/ 279 280 281 void dct_32(Int32 vec[]) 282 { 283 284 pv_split(&vec[16]); 285 286 dct_16(&vec[16], 0); 287 dct_16(vec, 1); // Even terms 288 289 pv_merge_in_place_N32(vec); 290 } 291 292 #endif /* AAC_PLUS */ 293 294 295
