rsCpuIntrinsicBlur.cpp revision 446788007efe0a673d0366284026adfa17b36fed
1/* 2 * Copyright (C) 2012 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#include "rsCpuIntrinsic.h" 18#include "rsCpuIntrinsicInlines.h" 19 20using namespace android; 21using namespace android::renderscript; 22 23namespace android { 24namespace renderscript { 25 26 27class RsdCpuScriptIntrinsicBlur : public RsdCpuScriptIntrinsic { 28public: 29 virtual void populateScript(Script *); 30 virtual void invokeFreeChildren(); 31 32 virtual void setGlobalVar(uint32_t slot, const void *data, size_t dataLength); 33 virtual void setGlobalObj(uint32_t slot, ObjectBase *data); 34 35 virtual ~RsdCpuScriptIntrinsicBlur(); 36 RsdCpuScriptIntrinsicBlur(RsdCpuReferenceImpl *ctx, const Script *s, const Element *e); 37 38protected: 39 float mFp[104]; 40 uint16_t mIp[104]; 41 void **mScratch; 42 size_t *mScratchSize; 43 float mRadius; 44 int mIradius; 45 ObjectBaseRef<Allocation> mAlloc; 46 47 static void kernelU4(const RsForEachStubParamStruct *p, 48 uint32_t xstart, uint32_t xend, 49 uint32_t instep, uint32_t outstep); 50 static void kernelU1(const RsForEachStubParamStruct *p, 51 uint32_t xstart, uint32_t xend, 52 uint32_t instep, uint32_t outstep); 53 void ComputeGaussianWeights(); 54}; 55 56} 57} 58 59 60void RsdCpuScriptIntrinsicBlur::ComputeGaussianWeights() { 61 memset(mFp, 0, sizeof(mFp)); 62 memset(mIp, 0, sizeof(mIp)); 63 64 // Compute gaussian weights for the blur 65 // e is the euler's number 66 float e = 2.718281828459045f; 67 float pi = 3.1415926535897932f; 68 // g(x) = ( 1 / sqrt( 2 * pi ) * sigma) * e ^ ( -x^2 / 2 * sigma^2 ) 69 // x is of the form [-radius .. 0 .. radius] 70 // and sigma varies with radius. 71 // Based on some experimental radius values and sigma's 72 // we approximately fit sigma = f(radius) as 73 // sigma = radius * 0.4 + 0.6 74 // The larger the radius gets, the more our gaussian blur 75 // will resemble a box blur since with large sigma 76 // the gaussian curve begins to lose its shape 77 float sigma = 0.4f * mRadius + 0.6f; 78 79 // Now compute the coefficients. We will store some redundant values to save 80 // some math during the blur calculations precompute some values 81 float coeff1 = 1.0f / (sqrtf(2.0f * pi) * sigma); 82 float coeff2 = - 1.0f / (2.0f * sigma * sigma); 83 84 float normalizeFactor = 0.0f; 85 float floatR = 0.0f; 86 int r; 87 mIradius = (float)ceil(mRadius) + 0.5f; 88 for (r = -mIradius; r <= mIradius; r ++) { 89 floatR = (float)r; 90 mFp[r + mIradius] = coeff1 * powf(e, floatR * floatR * coeff2); 91 normalizeFactor += mFp[r + mIradius]; 92 } 93 94 //Now we need to normalize the weights because all our coefficients need to add up to one 95 normalizeFactor = 1.0f / normalizeFactor; 96 for (r = -mIradius; r <= mIradius; r ++) { 97 mFp[r + mIradius] *= normalizeFactor; 98 mIp[r + mIradius] = (uint16_t)(mFp[r + mIradius] * 65536.0f + 0.5f); 99 } 100} 101 102void RsdCpuScriptIntrinsicBlur::setGlobalObj(uint32_t slot, ObjectBase *data) { 103 rsAssert(slot == 1); 104 mAlloc.set(static_cast<Allocation *>(data)); 105} 106 107void RsdCpuScriptIntrinsicBlur::setGlobalVar(uint32_t slot, const void *data, size_t dataLength) { 108 rsAssert(slot == 0); 109 mRadius = ((const float *)data)[0]; 110 ComputeGaussianWeights(); 111} 112 113 114 115static void OneVU4(const RsForEachStubParamStruct *p, float4 *out, int32_t x, int32_t y, 116 const uchar *ptrIn, int iStride, const float* gPtr, int iradius) { 117 118 const uchar *pi = ptrIn + x*4; 119 120 float4 blurredPixel = 0; 121 for (int r = -iradius; r <= iradius; r ++) { 122 int validY = rsMax((y + r), 0); 123 validY = rsMin(validY, (int)(p->dimY - 1)); 124 const uchar4 *pvy = (const uchar4 *)&pi[validY * iStride]; 125 float4 pf = convert_float4(pvy[0]); 126 blurredPixel += pf * gPtr[0]; 127 gPtr++; 128 } 129 130 out->xyzw = blurredPixel; 131} 132 133static void OneVU1(const RsForEachStubParamStruct *p, float *out, int32_t x, int32_t y, 134 const uchar *ptrIn, int iStride, const float* gPtr, int iradius) { 135 136 const uchar *pi = ptrIn + x; 137 138 float blurredPixel = 0; 139 for (int r = -iradius; r <= iradius; r ++) { 140 int validY = rsMax((y + r), 0); 141 validY = rsMin(validY, (int)(p->dimY - 1)); 142 float pf = (float)pi[validY * iStride]; 143 blurredPixel += pf * gPtr[0]; 144 gPtr++; 145 } 146 147 out[0] = blurredPixel; 148} 149 150 151extern "C" void rsdIntrinsicBlurU1_K(uchar *out, uchar const *in, size_t w, size_t h, 152 size_t p, size_t x, size_t y, size_t count, size_t r, uint16_t const *tab); 153extern "C" void rsdIntrinsicBlurU4_K(uchar4 *out, uchar4 const *in, size_t w, size_t h, 154 size_t p, size_t x, size_t y, size_t count, size_t r, uint16_t const *tab); 155 156static void OneVFU4(float4 *out, 157 const uchar *ptrIn, int iStride, const float* gPtr, int ct, 158 int x1, int x2) { 159 160 while(x2 > x1) { 161 const uchar *pi = ptrIn; 162 float4 blurredPixel = 0; 163 const float* gp = gPtr; 164 165 for (int r = 0; r < ct; r++) { 166 float4 pf = convert_float4(((const uchar4 *)pi)[0]); 167 blurredPixel += pf * gp[0]; 168 pi += iStride; 169 gp++; 170 } 171 out->xyzw = blurredPixel; 172 x1++; 173 out++; 174 ptrIn+=4; 175 } 176} 177 178static void OneVFU1(float *out, 179 const uchar *ptrIn, int iStride, const float* gPtr, int ct, int x1, int x2) { 180 181 int len = x2 - x1; 182 183 while((x2 > x1) && (((uintptr_t)ptrIn) & 0x3)) { 184 const uchar *pi = ptrIn; 185 float blurredPixel = 0; 186 const float* gp = gPtr; 187 188 for (int r = 0; r < ct; r++) { 189 float pf = (float)pi[0]; 190 blurredPixel += pf * gp[0]; 191 pi += iStride; 192 gp++; 193 } 194 out[0] = blurredPixel; 195 x1++; 196 out++; 197 ptrIn++; 198 len--; 199 } 200 201 while(len > 0) { 202 const uchar *pi = ptrIn; 203 float blurredPixel = 0; 204 const float* gp = gPtr; 205 206 for (int r = 0; r < ct; r++) { 207 float pf = (float)pi[0]; 208 blurredPixel += pf * gp[0]; 209 pi += iStride; 210 gp++; 211 } 212 out[0] = blurredPixel; 213 len--; 214 out++; 215 ptrIn++; 216 } 217} 218 219static void OneHU4(const RsForEachStubParamStruct *p, uchar4 *out, int32_t x, 220 const float4 *ptrIn, const float* gPtr, int iradius) { 221 222 float4 blurredPixel = 0; 223 for (int r = -iradius; r <= iradius; r ++) { 224 int validX = rsMax((x + r), 0); 225 validX = rsMin(validX, (int)(p->dimX - 1)); 226 float4 pf = ptrIn[validX]; 227 blurredPixel += pf * gPtr[0]; 228 gPtr++; 229 } 230 231 out->xyzw = convert_uchar4(blurredPixel); 232} 233 234static void OneHU1(const RsForEachStubParamStruct *p, uchar *out, int32_t x, 235 const float *ptrIn, const float* gPtr, int iradius) { 236 237 float blurredPixel = 0; 238 for (int r = -iradius; r <= iradius; r ++) { 239 int validX = rsMax((x + r), 0); 240 validX = rsMin(validX, (int)(p->dimX - 1)); 241 float pf = ptrIn[validX]; 242 blurredPixel += pf * gPtr[0]; 243 gPtr++; 244 } 245 246 out[0] = (uchar)blurredPixel; 247} 248 249 250void RsdCpuScriptIntrinsicBlur::kernelU4(const RsForEachStubParamStruct *p, 251 uint32_t xstart, uint32_t xend, 252 uint32_t instep, uint32_t outstep) { 253 254 float4 stackbuf[2048]; 255 float4 *buf = &stackbuf[0]; 256 RsdCpuScriptIntrinsicBlur *cp = (RsdCpuScriptIntrinsicBlur *)p->usr; 257 if (!cp->mAlloc.get()) { 258 ALOGE("Blur executed without input, skipping"); 259 return; 260 } 261 const uchar *pin = (const uchar *)cp->mAlloc->mHal.drvState.lod[0].mallocPtr; 262 const size_t stride = cp->mAlloc->mHal.drvState.lod[0].stride; 263 264 uchar4 *out = (uchar4 *)p->out; 265 uint32_t x1 = xstart; 266 uint32_t x2 = xend; 267 268#if defined(ARCH_ARM_HAVE_VFP) 269 if (gArchUseSIMD) { 270 rsdIntrinsicBlurU4_K(out, (uchar4 const *)(pin + stride * p->y), p->dimX, p->dimY, 271 stride, x1, p->y, x2 - x1, cp->mIradius, cp->mIp + cp->mIradius); 272 return; 273 } 274#endif 275 276 if (p->dimX > 2048) { 277 if ((p->dimX > cp->mScratchSize[p->lid]) || !cp->mScratch[p->lid]) { 278 // Pad the side of the allocation by one unit to allow alignment later 279 cp->mScratch[p->lid] = realloc(cp->mScratch[p->lid], (p->dimX + 1) * 16); 280 cp->mScratchSize[p->lid] = p->dimX; 281 } 282 // realloc only aligns to 8 bytes so we manually align to 16. 283 buf = (float4 *) ((((intptr_t)cp->mScratch[p->lid]) + 15) & ~0xf); 284 } 285 float4 *fout = (float4 *)buf; 286 int y = p->y; 287 if ((y > cp->mIradius) && (y < ((int)p->dimY - cp->mIradius))) { 288 const uchar *pi = pin + (y - cp->mIradius) * stride; 289 OneVFU4(fout, pi, stride, cp->mFp, cp->mIradius * 2 + 1, x1, x2); 290 } else { 291 while(x2 > x1) { 292 OneVU4(p, fout, x1, y, pin, stride, cp->mFp, cp->mIradius); 293 fout++; 294 x1++; 295 } 296 } 297 298 x1 = xstart; 299 while ((x1 < (uint32_t)cp->mIradius) && (x1 < x2)) { 300 OneHU4(p, out, x1, buf, cp->mFp, cp->mIradius); 301 out++; 302 x1++; 303 } 304 while(x2 > x1) { 305 OneHU4(p, out, x1, buf, cp->mFp, cp->mIradius); 306 out++; 307 x1++; 308 } 309} 310 311void RsdCpuScriptIntrinsicBlur::kernelU1(const RsForEachStubParamStruct *p, 312 uint32_t xstart, uint32_t xend, 313 uint32_t instep, uint32_t outstep) { 314 float buf[4 * 2048]; 315 RsdCpuScriptIntrinsicBlur *cp = (RsdCpuScriptIntrinsicBlur *)p->usr; 316 if (!cp->mAlloc.get()) { 317 ALOGE("Blur executed without input, skipping"); 318 return; 319 } 320 const uchar *pin = (const uchar *)cp->mAlloc->mHal.drvState.lod[0].mallocPtr; 321 const size_t stride = cp->mAlloc->mHal.drvState.lod[0].stride; 322 323 uchar *out = (uchar *)p->out; 324 uint32_t x1 = xstart; 325 uint32_t x2 = xend; 326 327#if defined(ARCH_ARM_HAVE_VFP) 328 if (gArchUseSIMD) { 329 rsdIntrinsicBlurU1_K(out, pin + stride * p->y, p->dimX, p->dimY, 330 stride, x1, p->y, x2 - x1, cp->mIradius, cp->mIp + cp->mIradius); 331 return; 332 } 333#endif 334 335 float *fout = (float *)buf; 336 int y = p->y; 337 if ((y > cp->mIradius) && (y < ((int)p->dimY - cp->mIradius -1))) { 338 const uchar *pi = pin + (y - cp->mIradius) * stride; 339 OneVFU1(fout, pi, stride, cp->mFp, cp->mIradius * 2 + 1, x1, x2); 340 } else { 341 while(x2 > x1) { 342 OneVU1(p, fout, x1, y, pin, stride, cp->mFp, cp->mIradius); 343 fout++; 344 x1++; 345 } 346 } 347 348 x1 = xstart; 349 while ((x1 < x2) && 350 ((x1 < (uint32_t)cp->mIradius) || (((uintptr_t)out) & 0x3))) { 351 OneHU1(p, out, x1, buf, cp->mFp, cp->mIradius); 352 out++; 353 x1++; 354 } 355 while(x2 > x1) { 356 OneHU1(p, out, x1, buf, cp->mFp, cp->mIradius); 357 out++; 358 x1++; 359 } 360} 361 362RsdCpuScriptIntrinsicBlur::RsdCpuScriptIntrinsicBlur(RsdCpuReferenceImpl *ctx, 363 const Script *s, const Element *e) 364 : RsdCpuScriptIntrinsic(ctx, s, e, RS_SCRIPT_INTRINSIC_ID_BLUR) { 365 366 mRootPtr = NULL; 367 if (e->getType() == RS_TYPE_UNSIGNED_8) { 368 switch (e->getVectorSize()) { 369 case 1: 370 mRootPtr = &kernelU1; 371 break; 372 case 4: 373 mRootPtr = &kernelU4; 374 break; 375 } 376 } 377 rsAssert(mRootPtr); 378 mRadius = 5; 379 380 mScratch = new void *[mCtx->getThreadCount()]; 381 mScratchSize = new size_t[mCtx->getThreadCount()]; 382 memset(mScratch, 0, sizeof(void *) * mCtx->getThreadCount()); 383 memset(mScratchSize, 0, sizeof(size_t) * mCtx->getThreadCount()); 384 385 ComputeGaussianWeights(); 386} 387 388RsdCpuScriptIntrinsicBlur::~RsdCpuScriptIntrinsicBlur() { 389 uint32_t threads = mCtx->getThreadCount(); 390 if (mScratch) { 391 for (size_t i = 0; i < threads; i++) { 392 if (mScratch[i]) { 393 free(mScratch[i]); 394 } 395 } 396 delete []mScratch; 397 } 398 if (mScratchSize) { 399 delete []mScratchSize; 400 } 401} 402 403void RsdCpuScriptIntrinsicBlur::populateScript(Script *s) { 404 s->mHal.info.exportedVariableCount = 2; 405} 406 407void RsdCpuScriptIntrinsicBlur::invokeFreeChildren() { 408 mAlloc.clear(); 409} 410 411 412RsdCpuScriptImpl * rsdIntrinsic_Blur(RsdCpuReferenceImpl *ctx, const Script *s, const Element *e) { 413 414 return new RsdCpuScriptIntrinsicBlur(ctx, s, e); 415} 416 417 418