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