sbc_dct.c revision 5738f83aeb59361a0a2eda2460113f6dc919427
15738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project/****************************************************************************** 25738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * 35738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * Copyright (C) 1999-2012 Broadcom Corporation 45738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * 55738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 65738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * you may not use this file except in compliance with the License. 75738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * You may obtain a copy of the License at: 85738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * 95738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 105738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * 115738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 125738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 135738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 145738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * See the License for the specific language governing permissions and 155738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * limitations under the License. 165738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * 175738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project ******************************************************************************/ 185738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 195738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project/****************************************************************************** 205738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * 215738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * source file for fast dct operations 225738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project * 235738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project ******************************************************************************/ 245738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 255738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#include "sbc_encoder.h" 265738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#include "sbc_enc_func_declare.h" 275738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#include "sbc_dct.h" 285738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 295738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 305738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 315738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project/******************************************************************************* 325738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 335738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** Function SBC_FastIDCT8 345738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 355738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** Description implementation of fast DCT algorithm by Feig and Winograd 365738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 375738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 385738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** Returns y = dct(pInVect) 395738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 405738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 415738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project*******************************************************************************/ 425738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 435738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_IS_64_MULT_IN_IDCT == FALSE) 445738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_PI_SUR_4 (0x00005a82) /* ((0x8000) * 0.7071) = cos(pi/4) */ 455738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_PI_SUR_8 (0x00007641) /* ((0x8000) * 0.9239) = (cos(pi/8)) */ 465738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_3PI_SUR_8 (0x000030fb) /* ((0x8000) * 0.3827) = (cos(3*pi/8)) */ 475738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_PI_SUR_16 (0x00007d8a) /* ((0x8000) * 0.9808)) = (cos(pi/16)) */ 485738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_3PI_SUR_16 (0x00006a6d) /* ((0x8000) * 0.8315)) = (cos(3*pi/16)) */ 495738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_5PI_SUR_16 (0x0000471c) /* ((0x8000) * 0.5556)) = (cos(5*pi/16)) */ 505738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_7PI_SUR_16 (0x000018f8) /* ((0x8000) * 0.1951)) = (cos(7*pi/16)) */ 515738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_IDCT_MULT(a,b,c) SBC_MULT_32_16_SIMPLIFIED(a,b,c) 525738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#else 535738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_PI_SUR_4 (0x5A827999) /* ((0x80000000) * 0.707106781) = (cos(pi/4) ) */ 545738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_PI_SUR_8 (0x7641AF3C) /* ((0x80000000) * 0.923879533) = (cos(pi/8) ) */ 555738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_3PI_SUR_8 (0x30FBC54D) /* ((0x80000000) * 0.382683432) = (cos(3*pi/8) ) */ 565738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_PI_SUR_16 (0x7D8A5F3F) /* ((0x80000000) * 0.98078528 )) = (cos(pi/16) ) */ 575738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_3PI_SUR_16 (0x6A6D98A4) /* ((0x80000000) * 0.831469612)) = (cos(3*pi/16)) */ 585738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_5PI_SUR_16 (0x471CECE6) /* ((0x80000000) * 0.555570233)) = (cos(5*pi/16)) */ 595738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_COS_7PI_SUR_16 (0x18F8B83C) /* ((0x80000000) * 0.195090322)) = (cos(7*pi/16)) */ 605738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#define SBC_IDCT_MULT(a,b,c) SBC_MULT_32_32(a,b,c) 615738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif /* SBC_IS_64_MULT_IN_IDCT */ 625738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 635738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_FAST_DCT == FALSE) 645738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Projectextern const SINT16 gas16AnalDCTcoeff8[]; 655738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Projectextern const SINT16 gas16AnalDCTcoeff4[]; 665738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif 675738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 685738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Projectvoid SBC_FastIDCT8(SINT32 *pInVect, SINT32 *pOutVect) 695738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project{ 705738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_FAST_DCT == TRUE) 715738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_ARM_ASM_OPT==TRUE) 725738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#else 735738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_IPAQ_OPT==TRUE) 745738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_IS_64_MULT_IN_IDCT == TRUE) 755738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SINT64 s64Temp; 765738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif 775738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#else 785738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_IS_64_MULT_IN_IDCT == TRUE) 795738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SINT32 s32HiTemp; 805738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#else 815738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SINT32 s32In2Temp; 825738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project register SINT32 s32In1Temp; 835738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif 845738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif 855738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif 865738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 875738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project register SINT32 x0, x1, x2, x3, x4, x5, x6, x7,temp; 885738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SINT32 res_even[4], res_odd[4]; 895738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /*x0= (pInVect[4])/2 ;*/ 905738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT(SBC_COS_PI_SUR_4,pInVect[4], x0); 915738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /*printf("x0 0x%x = %d = %d * %d\n", x0, x0, SBC_COS_PI_SUR_4, pInVect[4]);*/ 925738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 935738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x1 = (pInVect[3] + pInVect[5]) >>1; 945738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x2 = (pInVect[2] + pInVect[6]) >>1; 955738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x3 = (pInVect[1] + pInVect[7]) >>1; 965738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x4 = (pInVect[0] + pInVect[8]) >>1; 975738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x5 = (pInVect[9] - pInVect[15]) >>1; 985738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x6 = (pInVect[10] - pInVect[14])>>1; 995738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x7 = (pInVect[11] - pInVect[13])>>1; 1005738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1015738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /* 2-point IDCT of x0 and x4 as in (11) */ 1025738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp = x0 ; 1035738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT(SBC_COS_PI_SUR_4, ( x0 + x4 ), x0); /*x0 = ( x0 + x4 ) * cos(1*pi/4) ; */ 1045738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT(SBC_COS_PI_SUR_4, ( temp - x4 ), x4); /*x4 = ( temp - x4 ) * cos(1*pi/4) ; */ 1055738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1065738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /* rearrangement of x2 and x6 as in (15) */ 1075738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x2 -=x6; 1085738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x6 <<= 1 ; 1095738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1105738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /* 2-point IDCT of x2 and x6 and post-multiplication as in (15) */ 1115738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT(SBC_COS_PI_SUR_4,x6, x6); /*x6 = x6 * cos(1*pi/4) ; */ 1125738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp = x2 ; 1135738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT(SBC_COS_PI_SUR_8,( x2 + x6 ), x2); /*x2 = ( x2 + x6 ) * cos(1*pi/8) ; */ 1145738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT(SBC_COS_3PI_SUR_8,( temp - x6 ), x6); /*x6 = ( temp - x6 ) * cos(3*pi/8) ;*/ 1155738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1165738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /* 4-point IDCT of x0,x2,x4 and x6 as in (11) */ 1175738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project res_even[ 0 ] = x0 + x2 ; 1185738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project res_even[ 1 ] = x4 + x6 ; 1195738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project res_even[ 2 ] = x4 - x6 ; 1205738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project res_even[ 3 ] = x0 - x2 ; 1215738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1225738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1235738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /* rearrangement of x1,x3,x5,x7 as in (15) */ 1245738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x7 <<= 1 ; 1255738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x5 = ( x5 <<1 ) - x7 ; 1265738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x3 = ( x3 <<1 ) - x5 ; 1275738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x1 -= x3 >>1 ; 1285738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1295738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /* two-dimensional IDCT of x1 and x5 */ 1305738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT(SBC_COS_PI_SUR_4, x5, x5); /*x5 = x5 * cos(1*pi/4) ; */ 1315738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp = x1 ; 1325738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x1 = x1 + x5 ; 1335738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x5 = temp - x5 ; 1345738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1355738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /* rearrangement of x3 and x7 as in (15) */ 1365738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x3 -= x7; 1375738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x7 <<= 1 ; 1385738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT(SBC_COS_PI_SUR_4, x7, x7); /*x7 = x7 * cos(1*pi/4) ; */ 1395738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1405738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /* 2-point IDCT of x3 and x7 and post-multiplication as in (15) */ 1415738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp = x3 ; 1425738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT( SBC_COS_PI_SUR_8,( x3 + x7 ), x3); /*x3 = ( x3 + x7 ) * cos(1*pi/8) ; */ 1435738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT( SBC_COS_3PI_SUR_8,( temp - x7 ), x7); /*x7 = ( temp - x7 ) * cos(3*pi/8) ;*/ 1445738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1455738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /* 4-point IDCT of x1,x3,x5 and x7 and post multiplication by diagonal matrix as in (14) */ 1465738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT((SBC_COS_PI_SUR_16), ( x1 + x3 ) , res_odd[0]); /*res_odd[ 0 ] = ( x1 + x3 ) * cos(1*pi/16) ; */ 1475738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT((SBC_COS_3PI_SUR_16), ( x5 + x7 ) , res_odd[1]); /*res_odd[ 1 ] = ( x5 + x7 ) * cos(3*pi/16) ; */ 1485738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT((SBC_COS_5PI_SUR_16), ( x5 - x7 ) , res_odd[2]); /*res_odd[ 2 ] = ( x5 - x7 ) * cos(5*pi/16) ; */ 1495738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT((SBC_COS_7PI_SUR_16), ( x1 - x3 ) , res_odd[3]); /*res_odd[ 3 ] = ( x1 - x3 ) * cos(7*pi/16) ; */ 1505738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1515738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /* additions and subtractions as in (9) */ 1525738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[0] = (res_even[ 0 ] + res_odd[ 0 ]) ; 1535738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[1] = (res_even[ 1 ] + res_odd[ 1 ]) ; 1545738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[2] = (res_even[ 2 ] + res_odd[ 2 ]) ; 1555738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[3] = (res_even[ 3 ] + res_odd[ 3 ]) ; 1565738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[7] = (res_even[ 0 ] - res_odd[ 0 ]) ; 1575738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[6] = (res_even[ 1 ] - res_odd[ 1 ]) ; 1585738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[5] = (res_even[ 2 ] - res_odd[ 2 ]) ; 1595738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[4] = (res_even[ 3 ] - res_odd[ 3 ]) ; 1605738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#else 1615738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project UINT8 Index, k; 1625738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SINT32 temp; 1635738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /*Calculate 4 subband samples by matrixing*/ 1645738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project for(Index=0; Index<8; Index++) 1655738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project { 1665738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp = 0; 1675738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project for(k=0; k<16; k++) 1685738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project { 1695738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /*temp += (SINT32)(((SINT64)M[(Index*strEncParams->numOfSubBands*2)+k] * Y[k]) >> 16 );*/ 1705738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp += (gas16AnalDCTcoeff8[(Index*8*2)+k] * (pInVect[k] >> 16)); 1715738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp += ((gas16AnalDCTcoeff8[(Index*8*2)+k] * (pInVect[k] & 0xFFFF)) >> 16); 1725738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project } 1735738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[Index] = temp; 1745738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project } 1755738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif 1765738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project/* printf("pOutVect: 0x%x;0x%x;0x%x;0x%x;0x%x;0x%x;0x%x;0x%x\n",\ 1775738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[0],pOutVect[1],pOutVect[2],pOutVect[3],pOutVect[4],pOutVect[5],pOutVect[6],pOutVect[7]);*/ 1785738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project} 1795738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 1805738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project/******************************************************************************* 1815738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 1825738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** Function SBC_FastIDCT4 1835738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 1845738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** Description implementation of fast DCT algorithm by Feig and Winograd 1855738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 1865738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 1875738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** Returns y = dct(x0) 1885738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 1895738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project** 1905738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project*******************************************************************************/ 1915738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Projectvoid SBC_FastIDCT4(SINT32 *pInVect, SINT32 *pOutVect) 1925738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project{ 1935738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_FAST_DCT == TRUE) 1945738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_ARM_ASM_OPT==TRUE) 1955738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#else 1965738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_IPAQ_OPT==TRUE) 1975738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_IS_64_MULT_IN_IDCT == TRUE) 1985738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SINT64 s64Temp; 1995738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif 2005738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#else 2015738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#if (SBC_IS_64_MULT_IN_IDCT == TRUE) 2025738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SINT32 s32HiTemp; 2035738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#else 2045738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project UINT16 s32In2Temp; 2055738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SINT32 s32In1Temp; 2065738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif 2075738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif 2085738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif 2095738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SINT32 temp,x2; 2105738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SINT32 tmp[8]; 2115738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project 2125738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project x2=pInVect[2]>>1; 2135738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp=(pInVect[0]+pInVect[4]); 2145738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT((SBC_COS_PI_SUR_4>>1), temp , tmp[0]); 2155738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project tmp[1]=x2-tmp[0]; 2165738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project tmp[0]+=x2; 2175738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp=(pInVect[1]+pInVect[3]); 2185738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT((SBC_COS_3PI_SUR_8>>1), temp , tmp[3]); 2195738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT((SBC_COS_PI_SUR_8>>1), temp , tmp[2]); 2205738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp=(pInVect[5]-pInVect[7]); 2215738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT((SBC_COS_3PI_SUR_8>>1), temp , tmp[5]); 2225738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SBC_IDCT_MULT((SBC_COS_PI_SUR_8>>1), temp , tmp[4]); 2235738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project tmp[6]=tmp[2]+tmp[5]; 2245738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project tmp[7]=tmp[3]-tmp[4]; 2255738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[0] = (tmp[0]+tmp[6]); 2265738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[1] = (tmp[1]+tmp[7]); 2275738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[2] = (tmp[1]-tmp[7]); 2285738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[3] = (tmp[0]-tmp[6]); 2295738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#else 2305738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project UINT8 Index, k; 2315738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project SINT32 temp; 2325738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /*Calculate 4 subband samples by matrixing*/ 2335738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project for(Index=0; Index<4; Index++) 2345738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project { 2355738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp = 0; 2365738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project for(k=0; k<8; k++) 2375738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project { 2385738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project /*temp += (SINT32)(((SINT64)M[(Index*strEncParams->numOfSubBands*2)+k] * Y[k]) >> 16 ); */ 2395738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp += (gas16AnalDCTcoeff4[(Index*4*2)+k] * (pInVect[k] >> 16)); 2405738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project temp += ((gas16AnalDCTcoeff4[(Index*4*2)+k] * (pInVect[k] & 0xFFFF)) >> 16); 2415738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project } 2425738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project pOutVect[Index] = temp; 2435738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project } 2445738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project#endif 2455738f83aeb59361a0a2eda2460113f6dc919427The Android Open Source Project} 246