1 /* 2 * Copyright (C) 2008 The Android Open Source Project 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 #ifndef bbf_FUNCTIONS_EM_H 18 #define bbf_FUNCTIONS_EM_H 19 20 /** 21 * This files contains gerneral purpose functions. 22 */ 23 24 /* ---- includes ----------------------------------------------------------- */ 25 26 #include "b_BasicEm/Context.h" 27 #include "b_TensorEm/Int16Rect.h" 28 #include "b_ImageEm/UInt32Image.h" 29 #include "b_ImageEm/UInt16ByteImage.h" 30 31 /* ---- related objects --------------------------------------------------- */ 32 33 /* ---- typedefs ----------------------------------------------------------- */ 34 35 /* ---- constants ---------------------------------------------------------- */ 36 37 /** table to quickly determine the number of set bits in an 8 bit variable */ 38 extern const uint16 bbf_bit8TblG[ 256 ]; 39 40 /* ---- external functions ------------------------------------------------- */ 41 42 /** sums up bits in 8 bit variable */ 43 #define bbf_BIT_SUM_8( vA ) ( bbf_bit8TblG[ vA ] ) 44 45 /** sums up bits in 16 bit variable */ 46 #define bbf_BIT_SUM_16( vA ) ( bbf_bit8TblG[ vA & 0x00FF ] + bbf_bit8TblG[ ( vA >> 8 ) & 0x00FF ] ) 47 48 /** sums up bits in 16 bit variable */ 49 #define bbf_BIT_SUM_32( vA ) ( bbf_bit8TblG[ vA & 0x00FF ] + bbf_bit8TblG[ ( vA >> 8 ) & 0x00FF ] + bbf_bit8TblG[ ( vA >> 16 ) & 0x00FF ] + bbf_bit8TblG[ ( vA >> 24 ) & 0x00FF ] ) 50 51 52 #endif /* bbf_FUNCTIONS_EM_H */ 53 54
