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 21 PacketVideo Corp. 22 MP3 Decoder Library 23 24 Filename: pvmp3_dct_16.cpp 25 26 Functions: 27 dct_16 28 pv_merge_in_place_N32 29 pv_split 30 31 Date: 09/21/2007 32 33 ------------------------------------------------------------------------------ 34 REVISION HISTORY 35 36 37 Description: 38 39 ------------------------------------------------------------------------------ 40 INPUT AND OUTPUT DEFINITIONS 41 42 dct_16 43 44 Input 45 int32 vec[], input vector length 16 46 Int flag processing direction: forward (1), backward ( 0) 47 Returns 48 49 int32 vec[], dct length 16 50 51 ------------------------------------------------------------------------------ 52 INPUT AND OUTPUT DEFINITIONS 53 54 pv_merge_in_place_N32 55 56 Input 57 int32 vec[], input vector length 16 58 59 Returns 60 61 int32 vec[], merged output of two dct 16 to create a dct 32 62 63 ------------------------------------------------------------------------------ 64 INPUT AND OUTPUT DEFINITIONS 65 66 pv_split 67 68 Input 69 int32 vec[], input vector length 16 70 71 Returns 72 73 int32 vec[], splitted even/odd and pre processing rotation 74 75 ------------------------------------------------------------------------------ 76 FUNCTION DESCRIPTION 77 78 dct 16 and tools to assemble a dct32 output 79 80 ------------------------------------------------------------------------------ 81 REQUIREMENTS 82 83 84 ------------------------------------------------------------------------------ 85 REFERENCES 86 87 ------------------------------------------------------------------------------ 88 PSEUDO-CODE 89 90 ------------------------------------------------------------------------------ 91 */ 92 93 #if ( !defined(PV_ARM_GCC_V5) && !defined(PV_ARM_GCC_V4) ) 94 /*---------------------------------------------------------------------------- 95 ; INCLUDES 96 ----------------------------------------------------------------------------*/ 97 98 #include "pvmp3_dct_16.h" 99 #include "pv_mp3dec_fxd_op.h" 100 101 /*---------------------------------------------------------------------------- 102 ; MACROS 103 ; Define module specific macros here 104 ----------------------------------------------------------------------------*/ 105 106 107 /*---------------------------------------------------------------------------- 108 ; DEFINES 109 ; Include all pre-processor statements here. Include conditional 110 ; compile variables also. 111 ----------------------------------------------------------------------------*/ 112 #define Qfmt(a) (int32)(a*((int32)1<<27)) 113 114 /*---------------------------------------------------------------------------- 115 ; LOCAL FUNCTION DEFINITIONS 116 ; Function Prototype declaration 117 ----------------------------------------------------------------------------*/ 118 119 /*---------------------------------------------------------------------------- 120 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS 121 ; Variable declaration - defined here and used outside this module 122 ----------------------------------------------------------------------------*/ 123 const int32 CosTable_dct32[16] = 124 { 125 Qfmt_31(0.50060299823520F) , Qfmt_31(0.50547095989754F) , 126 Qfmt_31(0.51544730992262F) , Qfmt_31(0.53104259108978F) , 127 Qfmt_31(0.55310389603444F) , Qfmt_31(0.58293496820613F) , 128 Qfmt_31(0.62250412303566F) , Qfmt_31(0.67480834145501F) , 129 Qfmt_31(0.74453627100230F) , Qfmt_31(0.83934964541553F) , 130 131 Qfmt(0.97256823786196F) , Qfmt(1.16943993343288F) , 132 Qfmt(1.48416461631417F) , Qfmt(2.05778100995341F) , 133 Qfmt(3.40760841846872F) , Qfmt(10.19000812354803F) 134 }; 135 136 137 /*---------------------------------------------------------------------------- 138 ; EXTERNAL FUNCTION REFERENCES 139 ; Declare functions defined elsewhere and referenced in this module 140 ----------------------------------------------------------------------------*/ 141 142 /*---------------------------------------------------------------------------- 143 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 144 ; Declare variables used in this module but defined elsewhere 145 ----------------------------------------------------------------------------*/ 146 147 148 /*---------------------------------------------------------------------------- 149 ; FUNCTION CODE 150 ----------------------------------------------------------------------------*/ 151 152 void pvmp3_dct_16(int32 vec[], int32 flag) 153 { 154 int32 tmp0; 155 int32 tmp1; 156 int32 tmp2; 157 int32 tmp3; 158 int32 tmp4; 159 int32 tmp5; 160 int32 tmp6; 161 int32 tmp7; 162 int32 tmp_o0; 163 int32 tmp_o1; 164 int32 tmp_o2; 165 int32 tmp_o3; 166 int32 tmp_o4; 167 int32 tmp_o5; 168 int32 tmp_o6; 169 int32 tmp_o7; 170 int32 itmp_e0; 171 int32 itmp_e1; 172 int32 itmp_e2; 173 174 /* split input vector */ 175 176 tmp_o0 = fxp_mul32_Q32((vec[ 0] - vec[15]), Qfmt_31(0.50241928618816F)); 177 tmp0 = vec[ 0] + vec[15]; 178 179 tmp_o7 = fxp_mul32_Q32((vec[ 7] - vec[ 8]) << 3, Qfmt_31(0.63764357733614F)); 180 tmp7 = vec[ 7] + vec[ 8]; 181 182 itmp_e0 = fxp_mul32_Q32((tmp0 - tmp7), Qfmt_31(0.50979557910416F)); 183 tmp7 = (tmp0 + tmp7); 184 185 tmp_o1 = fxp_mul32_Q32((vec[ 1] - vec[14]), Qfmt_31(0.52249861493969F)); 186 tmp1 = vec[ 1] + vec[14]; 187 188 tmp_o6 = fxp_mul32_Q32((vec[ 6] - vec[ 9]) << 1, Qfmt_31(0.86122354911916F)); 189 tmp6 = vec[ 6] + vec[ 9]; 190 191 192 193 itmp_e1 = (tmp1 + tmp6); 194 tmp6 = fxp_mul32_Q32((tmp1 - tmp6), Qfmt_31(0.60134488693505F)); 195 196 197 198 tmp_o2 = fxp_mul32_Q32((vec[ 2] - vec[13]), Qfmt_31(0.56694403481636F)); 199 tmp2 = vec[ 2] + vec[13]; 200 tmp_o5 = fxp_mul32_Q32((vec[ 5] - vec[10]) << 1, Qfmt_31(0.53033884299517F)); 201 tmp5 = vec[ 5] + vec[10]; 202 203 itmp_e2 = (tmp2 + tmp5); 204 tmp5 = fxp_mul32_Q32((tmp2 - tmp5), Qfmt_31(0.89997622313642F)); 205 206 tmp_o3 = fxp_mul32_Q32((vec[ 3] - vec[12]), Qfmt_31(0.64682178335999F)); 207 tmp3 = vec[ 3] + vec[12]; 208 tmp_o4 = fxp_mul32_Q32((vec[ 4] - vec[11]), Qfmt_31(0.78815462345125F)); 209 tmp4 = vec[ 4] + vec[11]; 210 211 tmp1 = (tmp3 + tmp4); 212 tmp4 = fxp_mul32_Q32((tmp3 - tmp4) << 2, Qfmt_31(0.64072886193538F)); 213 214 /* split even part of tmp_e */ 215 216 tmp0 = (tmp7 + tmp1); 217 tmp1 = fxp_mul32_Q32((tmp7 - tmp1), Qfmt_31(0.54119610014620F)); 218 219 tmp3 = fxp_mul32_Q32((itmp_e1 - itmp_e2) << 1, Qfmt_31(0.65328148243819F)); 220 tmp7 = (itmp_e1 + itmp_e2); 221 222 vec[ 0] = (tmp0 + tmp7) >> 1; 223 vec[ 8] = fxp_mul32_Q32((tmp0 - tmp7), Qfmt_31(0.70710678118655F)); 224 tmp0 = fxp_mul32_Q32((tmp1 - tmp3) << 1, Qfmt_31(0.70710678118655F)); 225 vec[ 4] = tmp1 + tmp3 + tmp0; 226 vec[12] = tmp0; 227 228 /* split odd part of tmp_e */ 229 230 tmp1 = fxp_mul32_Q32((itmp_e0 - tmp4) << 1, Qfmt_31(0.54119610014620F)); 231 tmp7 = itmp_e0 + tmp4; 232 233 tmp3 = fxp_mul32_Q32((tmp6 - tmp5) << 2, Qfmt_31(0.65328148243819F)); 234 tmp6 += tmp5; 235 236 tmp4 = fxp_mul32_Q32((tmp7 - tmp6) << 1, Qfmt_31(0.70710678118655F)); 237 tmp6 += tmp7; 238 tmp7 = fxp_mul32_Q32((tmp1 - tmp3) << 1, Qfmt_31(0.70710678118655F)); 239 240 tmp1 += tmp3 + tmp7; 241 vec[ 2] = tmp1 + tmp6; 242 vec[ 6] = tmp1 + tmp4; 243 vec[10] = tmp7 + tmp4; 244 vec[14] = tmp7; 245 246 247 // dct8; 248 249 tmp1 = fxp_mul32_Q32((tmp_o0 - tmp_o7) << 1, Qfmt_31(0.50979557910416F)); 250 tmp7 = tmp_o0 + tmp_o7; 251 252 tmp6 = tmp_o1 + tmp_o6; 253 tmp_o1 = fxp_mul32_Q32((tmp_o1 - tmp_o6) << 1, Qfmt_31(0.60134488693505F)); 254 255 tmp5 = tmp_o2 + tmp_o5; 256 tmp_o5 = fxp_mul32_Q32((tmp_o2 - tmp_o5) << 1, Qfmt_31(0.89997622313642F)); 257 258 tmp0 = fxp_mul32_Q32((tmp_o3 - tmp_o4) << 3, Qfmt_31(0.6407288619354F)); 259 tmp4 = tmp_o3 + tmp_o4; 260 261 if (!flag) 262 { 263 tmp7 = -tmp7; 264 tmp1 = -tmp1; 265 tmp6 = -tmp6; 266 tmp_o1 = -tmp_o1; 267 tmp5 = -tmp5; 268 tmp_o5 = -tmp_o5; 269 tmp4 = -tmp4; 270 tmp0 = -tmp0; 271 } 272 273 274 tmp2 = fxp_mul32_Q32((tmp1 - tmp0) << 1, Qfmt_31(0.54119610014620F)); 275 tmp0 += tmp1; 276 tmp1 = fxp_mul32_Q32((tmp7 - tmp4) << 1, Qfmt_31(0.54119610014620F)); 277 tmp7 += tmp4; 278 tmp4 = fxp_mul32_Q32((tmp6 - tmp5) << 2, Qfmt_31(0.65328148243819F)); 279 tmp6 += tmp5; 280 tmp5 = fxp_mul32_Q32((tmp_o1 - tmp_o5) << 2, Qfmt_31(0.65328148243819F)); 281 tmp_o1 += tmp_o5; 282 283 284 vec[13] = fxp_mul32_Q32((tmp1 - tmp4) << 1, Qfmt_31(0.70710678118655F)); 285 vec[ 5] = tmp1 + tmp4 + vec[13]; 286 287 vec[ 9] = fxp_mul32_Q32((tmp7 - tmp6) << 1, Qfmt_31(0.70710678118655F)); 288 vec[ 1] = tmp7 + tmp6; 289 290 tmp4 = fxp_mul32_Q32((tmp0 - tmp_o1) << 1, Qfmt_31(0.70710678118655F)); 291 tmp0 += tmp_o1; 292 tmp6 = fxp_mul32_Q32((tmp2 - tmp5) << 1, Qfmt_31(0.70710678118655F)); 293 tmp2 += tmp5 + tmp6; 294 tmp0 += tmp2; 295 296 vec[ 1] += tmp0; 297 vec[ 3] = tmp0 + vec[ 5]; 298 tmp2 += tmp4; 299 vec[ 5] = tmp2 + vec[ 5]; 300 vec[ 7] = tmp2 + vec[ 9]; 301 tmp4 += tmp6; 302 vec[ 9] = tmp4 + vec[ 9]; 303 vec[11] = tmp4 + vec[13]; 304 vec[13] = tmp6 + vec[13]; 305 vec[15] = tmp6; 306 307 } 308 /*---------------------------------------------------------------------------- 309 ; FUNCTION CODE 310 ----------------------------------------------------------------------------*/ 311 void pvmp3_merge_in_place_N32(int32 vec[]) 312 { 313 314 315 int32 temp0; 316 int32 temp1; 317 int32 temp2; 318 int32 temp3; 319 320 temp0 = vec[14]; 321 vec[14] = vec[ 7]; 322 temp1 = vec[12]; 323 vec[12] = vec[ 6]; 324 temp2 = vec[10]; 325 vec[10] = vec[ 5]; 326 temp3 = vec[ 8]; 327 vec[ 8] = vec[ 4]; 328 vec[ 6] = vec[ 3]; 329 vec[ 4] = vec[ 2]; 330 vec[ 2] = vec[ 1]; 331 332 vec[ 1] = (vec[16] + vec[17]); 333 vec[16] = temp3; 334 vec[ 3] = (vec[18] + vec[17]); 335 vec[ 5] = (vec[19] + vec[18]); 336 vec[18] = vec[9]; 337 338 vec[ 7] = (vec[20] + vec[19]); 339 vec[ 9] = (vec[21] + vec[20]); 340 vec[20] = temp2; 341 temp2 = vec[13]; 342 temp3 = vec[11]; 343 vec[11] = (vec[22] + vec[21]); 344 vec[13] = (vec[23] + vec[22]); 345 vec[22] = temp3; 346 temp3 = vec[15]; 347 348 vec[15] = (vec[24] + vec[23]); 349 vec[17] = (vec[25] + vec[24]); 350 vec[19] = (vec[26] + vec[25]); 351 vec[21] = (vec[27] + vec[26]); 352 vec[23] = (vec[28] + vec[27]); 353 vec[24] = temp1; 354 vec[25] = (vec[29] + vec[28]); 355 vec[26] = temp2; 356 vec[27] = (vec[30] + vec[29]); 357 vec[28] = temp0; 358 vec[29] = (vec[30] + vec[31]); 359 vec[30] = temp3; 360 } 361 362 363 /*---------------------------------------------------------------------------- 364 ; FUNCTION CODE 365 ----------------------------------------------------------------------------*/ 366 367 368 369 void pvmp3_split(int32 *vect) 370 { 371 372 int32 i; 373 const int32 *pt_cosTerms = &CosTable_dct32[15]; 374 int32 *pt_vect = vect; 375 int32 *pt_vect_2 = pt_vect - 1; 376 377 for (i = 3; i != 0; i--) 378 { 379 int32 tmp2 = *(pt_vect); 380 int32 tmp1 = *(pt_vect_2); 381 int32 cosx = *(pt_cosTerms--); 382 *(pt_vect_2--) = (tmp1 + tmp2); 383 *(pt_vect++) = fxp_mul32_Q27((tmp1 - tmp2), cosx); 384 385 tmp2 = *(pt_vect); 386 tmp1 = *(pt_vect_2); 387 cosx = *(pt_cosTerms--); 388 *(pt_vect_2--) = (tmp1 + tmp2); 389 *(pt_vect++) = fxp_mul32_Q27((tmp1 - tmp2), cosx); 390 391 } 392 393 for (i = 5; i != 0; i--) 394 { 395 int32 tmp2 = *(pt_vect); 396 int32 tmp1 = *(pt_vect_2); 397 int32 cosx = *(pt_cosTerms--); 398 *(pt_vect_2--) = (tmp1 + tmp2); 399 *(pt_vect++) = fxp_mul32_Q32((tmp1 - tmp2) << 1, cosx); 400 401 tmp2 = *(pt_vect); 402 tmp1 = *(pt_vect_2); 403 cosx = *(pt_cosTerms--); 404 *(pt_vect_2--) = (tmp1 + tmp2); 405 *(pt_vect++) = fxp_mul32_Q32((tmp1 - tmp2) << 1, cosx); 406 } 407 408 } 409 410 #endif 411
