Home | History | Annotate | Download | only in b_BitFeatureEm
      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 /* ---- includes ----------------------------------------------------------- */
     18 
     19 #include "b_BasicEm/Functions.h"
     20 #include "b_BasicEm/Math.h"
     21 #include "b_BitFeatureEm/L01Tld2x4Ftr.h"
     22 
     23 /* ------------------------------------------------------------------------- */
     24 
     25 /* ========================================================================= */
     26 /*                                                                           */
     27 /* ---- \ghd{ auxiliary functions } ---------------------------------------- */
     28 /*                                                                           */
     29 /* ========================================================================= */
     30 
     31 /* ------------------------------------------------------------------------- */
     32 
     33 /* ========================================================================= */
     34 /*                                                                           */
     35 /* ---- \ghd{ constructor / destructor } ----------------------------------- */
     36 /*                                                                           */
     37 /* ========================================================================= */
     38 
     39 /* ------------------------------------------------------------------------- */
     40 
     41 void bbf_L01Tld2x4Ftr_init( struct bbs_Context* cpA,
     42 						    struct bbf_L01Tld2x4Ftr* ptrA )
     43 {
     44 	bbf_Feature_init( cpA, &ptrA->baseE );
     45 	ptrA->baseE.typeE = ( uint32 )bbf_FT_L01_TLD_2X4_FTR;
     46 	ptrA->baseE.vpActivityE = bbf_L01Tld2x4Ftr_activity;
     47 	bbs_UInt32Arr_init( cpA, &ptrA->dataArrE );
     48 	ptrA->activityFactorE = 0;
     49 }
     50 
     51 /* ------------------------------------------------------------------------- */
     52 
     53 void bbf_L01Tld2x4Ftr_exit( struct bbs_Context* cpA,
     54 						    struct bbf_L01Tld2x4Ftr* ptrA )
     55 {
     56 	bbf_Feature_exit( cpA, &ptrA->baseE );
     57 	bbs_UInt32Arr_exit( cpA, &ptrA->dataArrE );
     58 	ptrA->activityFactorE = 0;
     59 }
     60 
     61 /* ------------------------------------------------------------------------- */
     62 
     63 /* ========================================================================= */
     64 /*                                                                           */
     65 /* ---- \ghd{ operators } -------------------------------------------------- */
     66 /*                                                                           */
     67 /* ========================================================================= */
     68 
     69 /* ------------------------------------------------------------------------- */
     70 
     71 void bbf_L01Tld2x4Ftr_copy( struct bbs_Context* cpA,
     72 						    struct bbf_L01Tld2x4Ftr* ptrA,
     73 						    const struct bbf_L01Tld2x4Ftr* srcPtrA )
     74 {
     75 	bbf_Feature_copy( cpA, &ptrA->baseE, &srcPtrA->baseE );
     76 	bbs_UInt32Arr_copy( cpA, &ptrA->dataArrE, &srcPtrA->dataArrE );
     77 	ptrA->activityFactorE = srcPtrA->activityFactorE;
     78 }
     79 
     80 /* ------------------------------------------------------------------------- */
     81 
     82 flag bbf_L01Tld2x4Ftr_equal( struct bbs_Context* cpA,
     83 						     const struct bbf_L01Tld2x4Ftr* ptrA,
     84 						     const struct bbf_L01Tld2x4Ftr* srcPtrA )
     85 {
     86 	if( !bbf_Feature_equal( cpA, &ptrA->baseE, &srcPtrA->baseE ) ) return FALSE;
     87 	if( !bbs_UInt32Arr_equal( cpA, &ptrA->dataArrE, &srcPtrA->dataArrE ) ) return FALSE;
     88 	if( ptrA->activityFactorE != srcPtrA->activityFactorE ) return FALSE;
     89 	return TRUE;
     90 }
     91 
     92 /* ------------------------------------------------------------------------- */
     93 
     94 /* ========================================================================= */
     95 /*                                                                           */
     96 /* ---- \ghd{ query functions } -------------------------------------------- */
     97 /*                                                                           */
     98 /* ========================================================================= */
     99 
    100 /* ------------------------------------------------------------------------- */
    101 
    102 /* ========================================================================= */
    103 /*                                                                           */
    104 /* ---- \ghd{ modify functions } ------------------------------------------- */
    105 /*                                                                           */
    106 /* ========================================================================= */
    107 
    108 /* ------------------------------------------------------------------------- */
    109 
    110 /* ========================================================================= */
    111 /*                                                                           */
    112 /* ---- \ghd{ I/O } -------------------------------------------------------- */
    113 /*                                                                           */
    114 /* ========================================================================= */
    115 
    116 /* ------------------------------------------------------------------------- */
    117 
    118 uint32 bbf_L01Tld2x4Ftr_memSize( struct bbs_Context* cpA,
    119 							     const struct bbf_L01Tld2x4Ftr* ptrA )
    120 {
    121 	uint32 memSizeL = bbs_SIZEOF16( uint32 ) +
    122 					  bbs_SIZEOF16( uint32 ); /* version */
    123 
    124 	memSizeL += bbf_Feature_memSize( cpA, &ptrA->baseE );
    125 	memSizeL += bbs_UInt32Arr_memSize( cpA, &ptrA->dataArrE );
    126 	memSizeL += bbs_SIZEOF16( ptrA->activityFactorE );
    127 
    128 	return memSizeL;
    129 }
    130 
    131 /* ------------------------------------------------------------------------- */
    132 
    133 uint32 bbf_L01Tld2x4Ftr_memWrite( struct bbs_Context* cpA,
    134 							      const struct bbf_L01Tld2x4Ftr* ptrA,
    135 								  uint16* memPtrA )
    136 {
    137 	uint32 memSizeL = bbf_L01Tld2x4Ftr_memSize( cpA, ptrA );
    138 	memPtrA += bbs_memWrite32( &memSizeL, memPtrA );
    139 	memPtrA += bbs_memWriteUInt32( bbf_L01_TLD_2X4_FTR_VERSION, memPtrA );
    140 	memPtrA += bbf_Feature_memWrite( cpA, &ptrA->baseE, memPtrA );
    141 	memPtrA += bbs_UInt32Arr_memWrite( cpA, &ptrA->dataArrE, memPtrA );
    142 	memPtrA += bbs_memWrite32( &ptrA->activityFactorE, memPtrA );
    143 	return memSizeL;
    144 }
    145 
    146 /* ------------------------------------------------------------------------- */
    147 
    148 uint32 bbf_L01Tld2x4Ftr_memRead( struct bbs_Context* cpA,
    149 							     struct bbf_L01Tld2x4Ftr* ptrA,
    150 							     const uint16* memPtrA,
    151 							     struct bbs_MemTbl* mtpA )
    152 {
    153 	uint32 memSizeL, versionL;
    154 	struct bbs_MemTbl memTblL = *mtpA;
    155 	struct bbs_MemSeg* espL = bbs_MemTbl_fastestSegPtr( cpA, &memTblL, 0 );
    156 	if( bbs_Context_error( cpA ) ) return 0;
    157 	memPtrA += bbs_memRead32( &memSizeL, memPtrA );
    158 	memPtrA += bbs_memReadVersion32( cpA, &versionL, bbf_L01_TLD_2X4_FTR_VERSION, memPtrA );
    159 	memPtrA += bbf_Feature_memRead( cpA, &ptrA->baseE, memPtrA );
    160 	memPtrA += bbs_UInt32Arr_memRead( cpA, &ptrA->dataArrE, memPtrA, espL );
    161 	memPtrA += bbs_memRead32( &ptrA->activityFactorE, memPtrA );
    162 	if( memSizeL != bbf_L01Tld2x4Ftr_memSize( cpA, ptrA ) )
    163 	{
    164 		bbs_ERR0( bbs_ERR_CORRUPT_DATA, "uint32 bbf_L01Tld2x4Ftr_memRead( struct bem_ScanGradientMove* ptrA, const uint16* memPtrA ):\n"
    165 			        "size mismatch" );
    166 		return 0;
    167 	}
    168 
    169 	return memSizeL;
    170 }
    171 
    172 /* ------------------------------------------------------------------------- */
    173 
    174 /* ========================================================================= */
    175 /*                                                                           */
    176 /* ---- \ghd{ exec functions } --------------------------------------------- */
    177 /*                                                                           */
    178 /* ========================================================================= */
    179 
    180 /* ------------------------------------------------------------------------- */
    181 
    182 int32 bbf_L01Tld2x4Ftr_activity( const struct bbf_Feature* ptrA, const uint32* patchA )
    183 {
    184 	const struct bbf_L01Tld2x4Ftr* ptrL = ( struct bbf_L01Tld2x4Ftr* )ptrA;
    185 
    186 	const uint32* dataPtrL = ptrL->dataArrE.arrPtrE;
    187 	const uint32* patchL = patchA;
    188 
    189 	uint32 iL;
    190 
    191 	uint32 bs1L = 0;
    192 	uint32 bs2L = 0;
    193 
    194 	for( iL = ptrL->baseE.patchWidthE >> 3; iL > 0; iL-- )
    195 	{
    196 		uint32 vL = ~dataPtrL[ 0 ];
    197 
    198 		/* compare with pattern */
    199 		uint32 s1L = patchL[ 0 ] ^ dataPtrL[ 1 ];
    200 		uint32 s2L = patchL[ 1 ] ^ dataPtrL[ 2 ];
    201 
    202 		/* bit count */
    203 		s1L = ( s1L & 0x55555555 ) + ( ( s1L >> 1 ) & 0x55555555 );
    204 		s1L = ( s1L & 0x33333333 ) + ( ( s1L >> 2 ) & 0x33333333 );
    205 		s2L = ( s2L & 0x55555555 ) + ( ( s2L >> 1 ) & 0x55555555 );
    206 		s2L = ( s2L & 0x33333333 ) + ( ( s2L >> 2 ) & 0x33333333 );
    207 
    208 		/* compare with threshold and store results in vL */
    209 		vL |= ( ( s1L + s2L + dataPtrL[ 3 ] ) & 0x88888888 ) >> 3;
    210 
    211 		/* compare with pattern */
    212 		s1L = patchL[ 2 ] ^ dataPtrL[ 4 ];
    213 		s2L = patchL[ 3 ] ^ dataPtrL[ 5 ];
    214 
    215 		/* bit count */
    216 		s1L = ( s1L & 0x55555555 ) + ( ( s1L >> 1 ) & 0x55555555 );
    217 		s1L = ( s1L & 0x33333333 ) + ( ( s1L >> 2 ) & 0x33333333 );
    218 		s2L = ( s2L & 0x55555555 ) + ( ( s2L >> 1 ) & 0x55555555 );
    219 		s2L = ( s2L & 0x33333333 ) + ( ( s2L >> 2 ) & 0x33333333 );
    220 
    221 		/* compare with threshold and store results in vL */
    222 		vL |= ( ( s1L + s2L + dataPtrL[ 6 ] ) & 0x88888888 ) >> 2;
    223 
    224 		/* compare with pattern */
    225 		s1L = patchL[ 4 ] ^ dataPtrL[ 7 ];
    226 		s2L = patchL[ 5 ] ^ dataPtrL[ 8 ];
    227 
    228 		/* bit count */
    229 		s1L = ( s1L & 0x55555555 ) + ( ( s1L >> 1 ) & 0x55555555 );
    230 		s1L = ( s1L & 0x33333333 ) + ( ( s1L >> 2 ) & 0x33333333 );
    231 		s2L = ( s2L & 0x55555555 ) + ( ( s2L >> 1 ) & 0x55555555 );
    232 		s2L = ( s2L & 0x33333333 ) + ( ( s2L >> 2 ) & 0x33333333 );
    233 
    234 		/* compare with threshold and store results in vL */
    235 		vL |= ( ( s1L + s2L + dataPtrL[ 9 ] ) & 0x88888888 ) >> 1;
    236 
    237 		/* compare with pattern */
    238 		s1L = patchL[ 6 ] ^ dataPtrL[ 10 ];
    239 		s2L = patchL[ 7 ] ^ dataPtrL[ 11 ];
    240 
    241 		/* bit count */
    242 		s1L = ( s1L & 0x55555555 ) + ( ( s1L >> 1 ) & 0x55555555 );
    243 		s1L = ( s1L & 0x33333333 ) + ( ( s1L >> 2 ) & 0x33333333 );
    244 		s2L = ( s2L & 0x55555555 ) + ( ( s2L >> 1 ) & 0x55555555 );
    245 		s2L = ( s2L & 0x33333333 ) + ( ( s2L >> 2 ) & 0x33333333 );
    246 
    247 		/* compare with threshold and store results in vL */
    248 		vL |= ( ( s1L + s2L + dataPtrL[ 12 ] ) & 0x88888888 );
    249 
    250 		vL = ~vL;
    251 
    252 		/* add bits */
    253 		bs1L +=    vL        & 0x55555555;
    254 		bs2L +=  ( vL >> 1 ) & 0x55555555;
    255 
    256 		dataPtrL += 13;
    257 		patchL  += 8;
    258 	}
    259 
    260 	/* complete partial sums and compute final confidence */
    261 	bs1L = ( bs1L & 0x33333333 ) + ( ( bs1L >> 2 ) & 0x33333333 ) + ( bs2L & 0x33333333 ) + ( ( bs2L >> 2 ) & 0x33333333 );
    262 	bs1L = ( bs1L & 0x0F0F0F0F ) + ( ( bs1L >> 4 ) & 0x0F0F0F0F );
    263 	bs1L += bs1L >> 8;
    264 
    265 	/* compute final activity */
    266 	{
    267 		uint32 actL =  ( bs1L + ( bs1L >> 16 ) ) & 0x0FF;
    268 		return actL * ptrL->activityFactorE;
    269 	}
    270 }
    271 
    272 /* ------------------------------------------------------------------------- */
    273 
    274 /* ========================================================================= */
    275 
    276