armCOMM_IDCTTable.c revision 78e52bfac041d71ce53b5b13c2abf78af742b09d
1/* 2 * Copyright (C) 2007-2008 ARM Limited 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 express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 * 16 */ 17/** 18 * 19 * File Name: armCOMM_IDCTTable.c 20 * OpenMAX DL: v1.0.2 21 * Revision: 9641 22 * Date: Thursday, February 7, 2008 23 * 24 * 25 * 26 * 27 * File: armCOMM_IDCTTable.c 28 * Brief: Defines Tables used in IDCT computation 29 * 30 */ 31 32#include "armCOMM_IDCTTable.h" 33 34 /* Table of s(u)*A(u)*A(v)/16 at Q15 35 * s(u)=1.0 0 <= u <= 5 36 * s(6)=2.0 37 * s(7)=4.0 38 * A(0) = 2*sqrt(2) 39 * A(u) = 4*cos(u*pi/16) for (u!=0) 40 */ 41 42__align(4) const OMX_U16 armCOMM_IDCTPreScale [64] = 43{ 44 0x4000, 0x58c5, 0x539f, 0x4b42, 0x4000, 0x3249, 0x4546, 0x46a1, 45 0x58c5, 0x7b21, 0x73fc, 0x6862, 0x58c5, 0x45bf, 0x6016, 0x61f8, 46 0x539f, 0x73fc, 0x6d41, 0x6254, 0x539f, 0x41b3, 0x5a82, 0x5c48, 47 0x4b42, 0x6862, 0x6254, 0x587e, 0x4b42, 0x3b21, 0x5175, 0x530d, 48 0x4000, 0x58c5, 0x539f, 0x4b42, 0x4000, 0x3249, 0x4546, 0x46a1, 49 0x3249, 0x45bf, 0x41b3, 0x3b21, 0x3249, 0x2782, 0x366d, 0x377e, 50 0x22a3, 0x300b, 0x2d41, 0x28ba, 0x22a3, 0x1b37, 0x257e, 0x263a, 51 0x11a8, 0x187e, 0x1712, 0x14c3, 0x11a8, 0x0de0, 0x131d, 0x137d 52}; 53 /* Above array armCOMM_IDCTPreScale, in Q23 format */ 54const OMX_U32 armCOMM_IDCTPreScaleU32 [64] = 55{ 56 0x400000, 0x58c543, 0x539eba, 0x4b418c, 0x400000, 0x3248d4, 0x4545ea, 0x46a157, 57 0x58c543, 0x7b20d8, 0x73fbfc, 0x686214, 0x58c543, 0x45bf1f, 0x6015a5, 0x61f78b, 58 0x539eba, 0x73fbfc, 0x6d413d, 0x6253a6, 0x539eba, 0x41b328, 0x5a827a, 0x5c4869, 59 0x4b418c, 0x686214, 0x6253a6, 0x587de3, 0x4b418c, 0x3b20d8, 0x5174e0, 0x530d69, 60 0x400000, 0x58c543, 0x539eba, 0x4b418c, 0x400000, 0x3248d4, 0x4545ea, 0x46a157, 61 0x3248d4, 0x45bf1f, 0x41b328, 0x3b20d8, 0x3248d4, 0x27821d, 0x366d72, 0x377e6b, 62 0x22a2f5, 0x300ad3, 0x2d413d, 0x28ba70, 0x22a2f5, 0x1b36b9, 0x257d86, 0x26398d, 63 0x11a856, 0x187de3, 0x17121a, 0x14c35a, 0x11a856, 0x0ddf9b, 0x131cc7, 0x137ca2 64}; 65 66const OMX_U16 armCOMM_IDCTCoef [4] = 67{ 68 0x5a82, /* InvSqrt2 */ 69 0x30fc, /* SinPIBy8 */ 70 0x7642, /* CosPIBy8 */ 71 0x0000 72}; 73 74 75 76