The Android Open Source Project | 7f81d9b | 2009-03-03 19:30:08 -0800 | [diff] [blame^] | 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_TensorEm/Flt16Vec2D.h" |
| 20 | #include "b_TensorEm/Functions.h" |
| 21 | #include "b_BasicEm/Math.h" |
| 22 | #include "b_BasicEm/Memory.h" |
| 23 | |
| 24 | /* ------------------------------------------------------------------------- */ |
| 25 | |
| 26 | /* ========================================================================= */ |
| 27 | /* */ |
| 28 | /* ---- \ghd{ auxiliary functions } ---------------------------------------- */ |
| 29 | /* */ |
| 30 | /* ========================================================================= */ |
| 31 | |
| 32 | /* ------------------------------------------------------------------------- */ |
| 33 | |
| 34 | /* ========================================================================= */ |
| 35 | /* */ |
| 36 | /* ---- \ghd{ constructor / destructor } ----------------------------------- */ |
| 37 | /* */ |
| 38 | /* ========================================================================= */ |
| 39 | |
| 40 | /* ------------------------------------------------------------------------- */ |
| 41 | |
| 42 | void bts_Flt16Vec2D_init( struct bts_Flt16Vec2D* ptrA ) |
| 43 | { |
| 44 | ptrA->xE = 0; |
| 45 | ptrA->yE = 0; |
| 46 | ptrA->bbpE = 0; |
| 47 | } |
| 48 | |
| 49 | /* ------------------------------------------------------------------------- */ |
| 50 | |
| 51 | void bts_Flt16Vec2D_exit( struct bts_Flt16Vec2D* ptrA ) |
| 52 | { |
| 53 | ptrA->xE = 0; |
| 54 | ptrA->yE = 0; |
| 55 | ptrA->bbpE = 0; |
| 56 | } |
| 57 | |
| 58 | /* ------------------------------------------------------------------------- */ |
| 59 | |
| 60 | /* ========================================================================= */ |
| 61 | /* */ |
| 62 | /* ---- \ghd{ operators } -------------------------------------------------- */ |
| 63 | /* */ |
| 64 | /* ========================================================================= */ |
| 65 | |
| 66 | /* ------------------------------------------------------------------------- */ |
| 67 | |
| 68 | void bts_Flt16Vec2D_copy( struct bts_Flt16Vec2D* ptrA, const struct bts_Flt16Vec2D* srcPtrA ) |
| 69 | { |
| 70 | ptrA->bbpE = srcPtrA->bbpE; |
| 71 | ptrA->xE = srcPtrA->xE; |
| 72 | ptrA->yE = srcPtrA->yE; |
| 73 | } |
| 74 | |
| 75 | /* ------------------------------------------------------------------------- */ |
| 76 | |
| 77 | flag bts_Flt16Vec2D_equal( const struct bts_Flt16Vec2D* ptrA, const struct bts_Flt16Vec2D* srcPtrA ) |
| 78 | { |
| 79 | int32 bbpDiffL = ptrA->bbpE - srcPtrA->bbpE; |
| 80 | if( bbpDiffL == 0 ) |
| 81 | { |
| 82 | if( ptrA->xE != srcPtrA->xE ) return FALSE; |
| 83 | if( ptrA->yE != srcPtrA->yE ) return FALSE; |
| 84 | return TRUE; |
| 85 | } |
| 86 | |
| 87 | if( bbpDiffL > 0 ) |
| 88 | { |
| 89 | int32 xL = ( int32 ) srcPtrA->xE << bbpDiffL; |
| 90 | int32 yL = ( int32 ) srcPtrA->yE << bbpDiffL; |
| 91 | if( ptrA->xE != xL ) return FALSE; |
| 92 | if( ptrA->yE != yL ) return FALSE; |
| 93 | /* check if bits were lost by the shifting */ |
| 94 | if( srcPtrA->xE != ( xL >> bbpDiffL ) ) return FALSE; |
| 95 | if( srcPtrA->yE != ( yL >> bbpDiffL ) ) return FALSE; |
| 96 | return TRUE; |
| 97 | } |
| 98 | |
| 99 | if( bbpDiffL < 0 ) |
| 100 | { |
| 101 | int32 xL = ( int32 ) ptrA->xE << -bbpDiffL; |
| 102 | int32 yL = ( int32 ) ptrA->yE << -bbpDiffL; |
| 103 | if( xL != srcPtrA->xE ) return FALSE; |
| 104 | if( yL != srcPtrA->yE ) return FALSE; |
| 105 | /* check if bits were lost by the shifting */ |
| 106 | if( ptrA->xE != ( xL >> -bbpDiffL ) ) return FALSE; |
| 107 | if( ptrA->yE != ( yL >> -bbpDiffL ) ) return FALSE; |
| 108 | return TRUE; |
| 109 | } |
| 110 | |
| 111 | return TRUE; |
| 112 | } |
| 113 | |
| 114 | /* ------------------------------------------------------------------------- */ |
| 115 | |
| 116 | /* ========================================================================= */ |
| 117 | /* */ |
| 118 | /* ---- \ghd{ query functions } -------------------------------------------- */ |
| 119 | /* */ |
| 120 | /* ========================================================================= */ |
| 121 | |
| 122 | /* ------------------------------------------------------------------------- */ |
| 123 | |
| 124 | /* ========================================================================= */ |
| 125 | /* */ |
| 126 | /* ---- \ghd{ modify functions } ------------------------------------------- */ |
| 127 | /* */ |
| 128 | /* ========================================================================= */ |
| 129 | |
| 130 | /* ------------------------------------------------------------------------- */ |
| 131 | |
| 132 | /* ========================================================================= */ |
| 133 | /* */ |
| 134 | /* ---- \ghd{ I/O } -------------------------------------------------------- */ |
| 135 | /* */ |
| 136 | /* ========================================================================= */ |
| 137 | |
| 138 | /* ------------------------------------------------------------------------- */ |
| 139 | |
| 140 | /* ========================================================================= */ |
| 141 | /* */ |
| 142 | /* ---- \ghd{ exec functions } --------------------------------------------- */ |
| 143 | /* */ |
| 144 | /* ========================================================================= */ |
| 145 | |
| 146 | /* ------------------------------------------------------------------------- */ |
| 147 | |
| 148 | struct bts_Flt16Vec2D bts_Flt16Vec2D_create16( int16 xA, int16 yA, int16 bbpA ) |
| 149 | { |
| 150 | struct bts_Flt16Vec2D vecL; |
| 151 | vecL.xE = xA; |
| 152 | vecL.yE = yA; |
| 153 | vecL.bbpE = bbpA; |
| 154 | return vecL; |
| 155 | } |
| 156 | |
| 157 | /* ------------------------------------------------------------------------- */ |
| 158 | |
| 159 | struct bts_Flt16Vec2D bts_Flt16Vec2D_createVec16( struct bts_Int16Vec2D vecA, int16 bbpA ) |
| 160 | { |
| 161 | struct bts_Flt16Vec2D vecL; |
| 162 | vecL.xE = vecA.xE; |
| 163 | vecL.yE = vecA.yE; |
| 164 | vecL.bbpE = bbpA; |
| 165 | return vecL; |
| 166 | } |
| 167 | |
| 168 | /* ------------------------------------------------------------------------- */ |
| 169 | |
| 170 | struct bts_Flt16Vec2D bts_Flt16Vec2D_create32( int32 xA, int32 yA, int32 bbpA ) |
| 171 | { |
| 172 | struct bts_Flt16Vec2D vecL; |
| 173 | if( ( xA | yA ) == 0 ) |
| 174 | { |
| 175 | vecL.xE = 0; |
| 176 | vecL.yE = 0; |
| 177 | vecL.bbpE = 0; |
| 178 | } |
| 179 | else |
| 180 | { |
| 181 | int32 shiftL = bts_maxAbsIntLog2Of2( xA, yA ) - 13; |
| 182 | |
| 183 | if( shiftL > 0 ) |
| 184 | { |
| 185 | int32 sh1L = shiftL - 1; |
| 186 | vecL.xE = ( ( xA >> sh1L ) + 1 ) >> 1; |
| 187 | vecL.yE = ( ( yA >> sh1L ) + 1 ) >> 1; |
| 188 | } |
| 189 | else |
| 190 | { |
| 191 | vecL.xE = xA << -shiftL; |
| 192 | vecL.yE = yA << -shiftL; |
| 193 | } |
| 194 | vecL.bbpE = bbpA - shiftL; |
| 195 | } |
| 196 | return vecL; |
| 197 | } |
| 198 | |
| 199 | /* ------------------------------------------------------------------------- */ |
| 200 | |
| 201 | int32 bts_Flt16Vec2D_dotPrd( const struct bts_Flt16Vec2D* vec1PtrA, |
| 202 | const struct bts_Flt16Vec2D* vec2PtrA ) |
| 203 | { |
| 204 | return ( int32 ) vec1PtrA->xE * vec2PtrA->xE + ( int32 ) vec1PtrA->yE * vec2PtrA->yE; |
| 205 | } |
| 206 | |
| 207 | /* ------------------------------------------------------------------------- */ |
| 208 | |
| 209 | uint32 bts_Flt16Vec2D_norm2( const struct bts_Flt16Vec2D* ptrA ) |
| 210 | { |
| 211 | return ( int32 ) ptrA->xE * ptrA->xE + ( int32 ) ptrA->yE * ptrA->yE; |
| 212 | } |
| 213 | |
| 214 | /* ------------------------------------------------------------------------- */ |
| 215 | |
| 216 | uint16 bts_Flt16Vec2D_norm( const struct bts_Flt16Vec2D* ptrA ) |
| 217 | { |
| 218 | return bbs_sqrt32( ( int32 ) ptrA->xE * ptrA->xE + ( int32 ) ptrA->yE * ptrA->yE ); |
| 219 | } |
| 220 | |
| 221 | /* ------------------------------------------------------------------------- */ |
| 222 | |
| 223 | void bts_Flt16Vec2D_normalize( struct bts_Flt16Vec2D* ptrA ) |
| 224 | { |
| 225 | int32 normL = bbs_sqrt32( ( int32 ) ptrA->xE * ptrA->xE + ( int32 ) ptrA->yE * ptrA->yE ); |
| 226 | int32 xL = ( ( int32 ) ptrA->xE << 16 ) / normL; |
| 227 | int32 yL = ( ( int32 ) ptrA->yE << 16 ) / normL; |
| 228 | *ptrA = bts_Flt16Vec2D_create32( xL, yL, 16 ); |
| 229 | } |
| 230 | |
| 231 | /* ------------------------------------------------------------------------- */ |
| 232 | |
| 233 | struct bts_Flt16Vec2D bts_Flt16Vec2D_normalized( const struct bts_Flt16Vec2D* ptrA ) |
| 234 | { |
| 235 | struct bts_Flt16Vec2D vecL = *ptrA; |
| 236 | bts_Flt16Vec2D_normalize( &vecL ); |
| 237 | return vecL; |
| 238 | } |
| 239 | |
| 240 | /* ------------------------------------------------------------------------- */ |
| 241 | |
| 242 | phase16 bts_Flt16Vec2D_angle( const struct bts_Flt16Vec2D* vecPtrA ) |
| 243 | { |
| 244 | return bbs_phase16( vecPtrA->xE, vecPtrA->yE ); |
| 245 | } |
| 246 | |
| 247 | /* ------------------------------------------------------------------------- */ |
| 248 | |
| 249 | phase16 bts_Flt16Vec2D_enclosedAngle( const struct bts_Flt16Vec2D* vec1PtrA, |
| 250 | const struct bts_Flt16Vec2D* vec2PtrA ) |
| 251 | { |
| 252 | int32 xL = ( int32 ) vec1PtrA->xE * vec2PtrA->xE + ( int32 ) vec1PtrA->yE * vec2PtrA->yE; |
| 253 | int32 yL = ( int32 ) vec1PtrA->yE * vec2PtrA->xE - ( int32 ) vec1PtrA->xE * vec2PtrA->yE; |
| 254 | return bbs_phase16( xL, yL ); |
| 255 | } |
| 256 | |
| 257 | /* ------------------------------------------------------------------------- */ |
| 258 | |
| 259 | struct bts_Flt16Vec2D bts_Flt16Vec2D_add( struct bts_Flt16Vec2D vec1A, struct bts_Flt16Vec2D vec2A ) |
| 260 | { |
| 261 | int32 xL, yL, bbpL; |
| 262 | int32 shiftL = vec1A.bbpE - vec2A.bbpE; |
| 263 | |
| 264 | if( shiftL > 0 ) |
| 265 | { |
| 266 | xL = ( ( int32 ) vec2A.xE << shiftL ) + vec1A.xE; |
| 267 | yL = ( ( int32 ) vec2A.yE << shiftL ) + vec1A.yE; |
| 268 | bbpL = vec1A.bbpE; |
| 269 | } |
| 270 | else |
| 271 | { |
| 272 | xL = ( ( int32 ) vec1A.xE << -shiftL ) + vec2A.xE; |
| 273 | yL = ( ( int32 ) vec1A.yE << -shiftL ) + vec2A.yE; |
| 274 | bbpL = vec2A.bbpE; |
| 275 | } |
| 276 | |
| 277 | return bts_Flt16Vec2D_create32( xL, yL, bbpL ); |
| 278 | } |
| 279 | |
| 280 | /* ------------------------------------------------------------------------- */ |
| 281 | |
| 282 | struct bts_Flt16Vec2D bts_Flt16Vec2D_sub( struct bts_Flt16Vec2D vec1A, struct bts_Flt16Vec2D vec2A ) |
| 283 | { |
| 284 | int32 xL, yL, bbpL; |
| 285 | int32 shiftL = vec1A.bbpE - vec2A.bbpE; |
| 286 | |
| 287 | if( shiftL > 0 ) |
| 288 | { |
| 289 | xL = ( int32 ) vec1A.xE - ( ( int32 ) vec2A.xE << shiftL ); |
| 290 | yL = ( int32 ) vec1A.yE - ( ( int32 ) vec2A.yE << shiftL ); |
| 291 | bbpL = vec1A.bbpE; |
| 292 | } |
| 293 | else |
| 294 | { |
| 295 | xL = ( ( int32 ) vec1A.xE << -shiftL ) - vec2A.xE; |
| 296 | yL = ( ( int32 ) vec1A.yE << -shiftL ) - vec2A.yE; |
| 297 | bbpL = vec2A.bbpE; |
| 298 | } |
| 299 | |
| 300 | return bts_Flt16Vec2D_create32( xL, yL, bbpL ); |
| 301 | } |
| 302 | |
| 303 | /* ------------------------------------------------------------------------- */ |
| 304 | |
| 305 | struct bts_Flt16Vec2D bts_Flt16Vec2D_mul( struct bts_Flt16Vec2D vecA, int16 factorA, int32 bbpFactorA ) |
| 306 | { |
| 307 | int32 xL = ( int32 ) vecA.xE * factorA; |
| 308 | int32 yL = ( int32 ) vecA.yE * factorA; |
| 309 | return bts_Flt16Vec2D_create32( xL, yL, bbpFactorA + vecA.bbpE ); |
| 310 | } |
| 311 | |
| 312 | /* ------------------------------------------------------------------------- */ |
| 313 | |
| 314 | struct bts_Int16Vec2D bts_Flt16Vec2D_int16Vec2D( struct bts_Flt16Vec2D vecA, int32 dstBbpA ) |
| 315 | { |
| 316 | struct bts_Int16Vec2D vecL; |
| 317 | int32 shiftL = vecA.bbpE - dstBbpA; |
| 318 | |
| 319 | if( shiftL > 0 ) |
| 320 | { |
| 321 | vecL.xE = ( ( vecA.xE >> ( shiftL - 1 ) ) + 1 ) >> 1; |
| 322 | vecL.yE = ( ( vecA.yE >> ( shiftL - 1 ) ) + 1 ) >> 1; |
| 323 | } |
| 324 | else |
| 325 | { |
| 326 | vecL.xE = vecA.xE << ( -shiftL ); |
| 327 | vecL.yE = vecA.yE << ( -shiftL ); |
| 328 | } |
| 329 | |
| 330 | return vecL; |
| 331 | } |
| 332 | |
| 333 | /* ========================================================================= */ |
| 334 | |
| 335 | |