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/L04Dns3x3Ftr.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_L04Dns3x3Ftr_init( struct bbs_Context* cpA,
     42 						    struct bbf_L04Dns3x3Ftr* ptrA )
     43 {
     44 	bbf_Feature_init( cpA, &ptrA->baseE );
     45 	ptrA->baseE.typeE = ( uint32 )bbf_FT_L04_DNS_3X3_FTR;
     46 	ptrA->baseE.vpActivityE = bbf_L04Dns3x3Ftr_activity;
     47 	bbs_UInt32Arr_init( cpA, &ptrA->dataArrE );
     48 	ptrA->activityFactorE = 0;
     49 }
     50 
     51 /* ------------------------------------------------------------------------- */
     52 
     53 void bbf_L04Dns3x3Ftr_exit( struct bbs_Context* cpA,
     54 						    struct bbf_L04Dns3x3Ftr* 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_L04Dns3x3Ftr_copy( struct bbs_Context* cpA,
     72 						    struct bbf_L04Dns3x3Ftr* ptrA,
     73 						    const struct bbf_L04Dns3x3Ftr* 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_L04Dns3x3Ftr_equal( struct bbs_Context* cpA,
     83 						     const struct bbf_L04Dns3x3Ftr* ptrA,
     84 						     const struct bbf_L04Dns3x3Ftr* 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_L04Dns3x3Ftr_memSize( struct bbs_Context* cpA,
    119 							     const struct bbf_L04Dns3x3Ftr* 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_L04Dns3x3Ftr_memWrite( struct bbs_Context* cpA,
    134 							      const struct bbf_L04Dns3x3Ftr* ptrA,
    135 								  uint16* memPtrA )
    136 {
    137 	uint32 memSizeL = bbf_L04Dns3x3Ftr_memSize( cpA, ptrA );
    138 	memPtrA += bbs_memWrite32( &memSizeL, memPtrA );
    139 	memPtrA += bbs_memWriteUInt32( bbf_L04_DNS_3X3_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_L04Dns3x3Ftr_memRead( struct bbs_Context* cpA,
    149 							     struct bbf_L04Dns3x3Ftr* 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_L04_DNS_3X3_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_L04Dns3x3Ftr_memSize( cpA, ptrA ) )
    163 	{
    164 		bbs_ERR0( bbs_ERR_CORRUPT_DATA, "uint32 bbf_L04Dns3x3Ftr_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_L04Dns3x3Ftr_activity( const struct bbf_Feature* ptrA, const uint32* patchA )
    183 {
    184 	const struct bbf_L04Dns3x3Ftr* ptrL = ( struct bbf_L04Dns3x3Ftr* )ptrA;
    185 
    186 	uint32 wL = ptrL->baseE.patchWidthE - 2;
    187     uint32 hL = ptrL->baseE.patchHeightE - 2;
    188 	const uint32* dataPtrL = ptrL->dataArrE.arrPtrE;
    189 	uint32 iL;
    190 
    191 	uint32 borderMaskL = ( ( uint32 )1 << hL ) - 1;
    192 
    193 	uint32 sL[ 9 ];
    194 	uint32 bL[ 4 ] = { 0, 0, 0, 0 }; /* bit sum */
    195 
    196 	for( iL = 0; iL < wL; iL++ )
    197 	{
    198 		uint32 vL, mL, tL; /* bit sum and thresholds */
    199 
    200 		uint32 s1L = patchA[ iL     ];
    201 		uint32 s2L = patchA[ iL + 1 ];
    202 		uint32 s3L = patchA[ iL + 2 ];
    203 
    204 		/* comparison of pixels with patchHeightE - 3 features */
    205 		sL[ 0 ] = ( ( s1L      ) ^ dataPtrL[ 0 ] ) & borderMaskL;
    206 		sL[ 1 ] = ( ( s1L >> 1 ) ^ dataPtrL[ 1 ] ) & borderMaskL;
    207 		sL[ 2 ] = ( ( s1L >> 2 ) ^ dataPtrL[ 2 ] ) & borderMaskL;
    208 
    209 		sL[ 3 ] = ( ( s2L      ) ^ dataPtrL[ 3 ] ) & borderMaskL;
    210 		sL[ 4 ] = ( ( s2L >> 1 ) ^ dataPtrL[ 4 ] ) & borderMaskL;
    211 		sL[ 5 ] = ( ( s2L >> 2 ) ^ dataPtrL[ 5 ] ) & borderMaskL;
    212 
    213 		sL[ 6 ] = ( ( s3L      ) ^ dataPtrL[ 6 ] ) & borderMaskL;
    214 		sL[ 7 ] = ( ( s3L >> 1 ) ^ dataPtrL[ 7 ] ) & borderMaskL;
    215 		sL[ 8 ] = ( ( s3L >> 2 ) ^ dataPtrL[ 8 ] ) & borderMaskL;
    216 
    217 		/* parallel bit counting of patchHeightE - 2 features */
    218 		vL = 0;
    219 
    220 		mL = ( ( sL[ 0 ] & 0x11111111 ) + ( sL[ 1 ] & 0x11111111 ) + ( sL[ 2 ] & 0x11111111 ) +
    221 		       ( sL[ 3 ] & 0x11111111 ) + ( sL[ 4 ] & 0x11111111 ) + ( sL[ 5 ] & 0x11111111 ) +
    222 		  	   ( sL[ 6 ] & 0x11111111 ) + ( sL[ 7 ] & 0x11111111 ) + ( sL[ 8 ] & 0x11111111 ) );
    223 
    224 		tL = dataPtrL[ 9 ];
    225 
    226 		/* compare with thresholds and store results in vL */
    227 		vL |= ( ( (   mL        & 0x0F0F0F0F ) + (   tL        & 0x0F0F0F0F ) ) & 0x10101010 ) >> 4;
    228 		vL |= ( ( ( ( mL >> 4 ) & 0x0F0F0F0F ) + ( ( tL >> 4 ) & 0x0F0F0F0F ) ) & 0x10101010 );
    229 
    230 		/* shift values to prevent overflow in next summation */
    231 		sL[ 0 ] >>= 1; 	sL[ 1 ] >>= 1; sL[ 2 ] >>= 1;
    232 		sL[ 3 ] >>= 1; 	sL[ 4 ] >>= 1; sL[ 5 ] >>= 1;
    233 		sL[ 6 ] >>= 1; 	sL[ 7 ] >>= 1; sL[ 8 ] >>= 1;
    234 
    235 		mL = ( ( sL[ 0 ] & 0x11111111 ) + ( sL[ 1 ] & 0x11111111 ) + ( sL[ 2 ] & 0x11111111 ) +
    236 		       ( sL[ 3 ] & 0x11111111 ) + ( sL[ 4 ] & 0x11111111 ) + ( sL[ 5 ] & 0x11111111 ) +
    237 		  	   ( sL[ 6 ] & 0x11111111 ) + ( sL[ 7 ] & 0x11111111 ) + ( sL[ 8 ] & 0x11111111 ) );
    238 
    239 		tL = dataPtrL[ 10 ];
    240 
    241 		/* compare with thresholds and store results in vL */
    242 		vL |= ( ( (   mL        & 0x0F0F0F0F ) + (   tL        & 0x0F0F0F0F ) ) & 0x10101010 ) >> 3;
    243 		vL |= ( ( ( ( mL >> 4 ) & 0x0F0F0F0F ) + ( ( tL >> 4 ) & 0x0F0F0F0F ) ) & 0x10101010 ) << 1;
    244 
    245 		mL = ( ( sL[ 0 ] & 0x02222222 ) + ( sL[ 1 ] & 0x02222222 ) + ( sL[ 2 ] & 0x02222222 ) +
    246 		       ( sL[ 3 ] & 0x02222222 ) + ( sL[ 4 ] & 0x02222222 ) + ( sL[ 5 ] & 0x02222222 ) +
    247 		  	   ( sL[ 6 ] & 0x02222222 ) + ( sL[ 7 ] & 0x02222222 ) + ( sL[ 8 ] & 0x02222222 ) ) >> 1;
    248 
    249 		tL = dataPtrL[ 11 ];
    250 
    251 		/* compare with thresholds and store results in vL */
    252 		vL |= ( ( (   mL        & 0x0F0F0F0F ) + (   tL        & 0x0F0F0F0F ) ) & 0x10101010 ) >> 2;
    253 		vL |= ( ( ( ( mL >> 4 ) & 0x0F0F0F0F ) + ( ( tL >> 4 ) & 0x0F0F0F0F ) ) & 0x10101010 ) << 2;
    254 
    255 		mL = ( ( sL[ 0 ] & 0x04444444 ) + ( sL[ 1 ] & 0x04444444 ) + ( sL[ 2 ] & 0x04444444 ) +
    256 		       ( sL[ 3 ] & 0x04444444 ) + ( sL[ 4 ] & 0x04444444 ) + ( sL[ 5 ] & 0x04444444 ) +
    257 		  	   ( sL[ 6 ] & 0x04444444 ) + ( sL[ 7 ] & 0x04444444 ) + ( sL[ 8 ] & 0x04444444 ) ) >> 2;
    258 
    259 		tL = dataPtrL[ 12 ];
    260 
    261 		/* compare with thresholds and store results in vL */
    262 		vL |= ( ( (   mL        & 0x0F0F0F0F ) + (   tL        & 0x0F0F0F0F ) ) & 0x10101010 ) >> 1;
    263 		vL |= ( ( ( ( mL >> 4 ) & 0x0F0F0F0F ) + ( ( tL >> 4 ) & 0x0F0F0F0F ) ) & 0x10101010 ) << 3;
    264 
    265 		vL = ~vL;
    266 
    267 		/* mask out and count bits */
    268 		{
    269 			uint32 vmL;
    270 			vmL = vL & dataPtrL[ 13 ];
    271 			bL[ 0 ] += bbf_BIT_SUM_32( vmL );
    272 			vmL = vL & dataPtrL[ 14 ];
    273 			bL[ 1 ] += bbf_BIT_SUM_32( vmL);
    274 			vmL = vL & dataPtrL[ 15 ];
    275 			bL[ 2 ] += bbf_BIT_SUM_32( vmL );
    276 			vmL = vL & dataPtrL[ 16 ];
    277 			bL[ 3 ] += bbf_BIT_SUM_32( vmL );
    278 		}
    279 
    280 		dataPtrL += 17;
    281 	}
    282 
    283 	/* compute final activity */
    284 	{
    285 		uint32 actL = ( ( bL[ 0 ] << 3 ) + ( bL[ 1 ] << 2 ) + ( bL[ 2 ] << 1 ) + bL[ 3 ] );
    286 		return actL * ptrL->activityFactorE;
    287 	}
    288 }
    289 
    290 /* ------------------------------------------------------------------------- */
    291 
    292 /* ========================================================================= */
    293 
    294