rsCpuIntrinsicBlur.cpp revision 099bc262f862cdeb547cf8a78fe9e0e92560f437
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 short 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] = (short)(mIp[r + mIradius] * 32768); 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 150extern "C" void rsdIntrinsicBlurVFU4_K(void *dst, const void *pin, int stride, const void *gptr, int rct, int x1, int ct); 151extern "C" void rsdIntrinsicBlurHFU4_K(void *dst, const void *pin, const void *gptr, int rct, int x1, int ct); 152extern "C" void rsdIntrinsicBlurHFU1_K(void *dst, const void *pin, const void *gptr, int rct, int x1, int ct); 153 154static void OneVFU4(float4 *out, 155 const uchar *ptrIn, int iStride, const float* gPtr, int ct, 156 int x1, int x2) { 157 158#if defined(ARCH_ARM_HAVE_NEON) 159 { 160 int t = (x2 - x1); 161 t &= ~1; 162 if(t) { 163 rsdIntrinsicBlurVFU4_K(out, ptrIn, iStride, gPtr, ct, x1, x1 + t); 164 } 165 x1 += t; 166 } 167#endif 168 169 while(x2 > x1) { 170 const uchar *pi = ptrIn; 171 float4 blurredPixel = 0; 172 const float* gp = gPtr; 173 174 for (int r = 0; r < ct; r++) { 175 float4 pf = convert_float4(((const uchar4 *)pi)[0]); 176 blurredPixel += pf * gp[0]; 177 pi += iStride; 178 gp++; 179 } 180 out->xyzw = blurredPixel; 181 x1++; 182 out++; 183 ptrIn++; 184 } 185} 186 187static void OneVFU1(float *out, 188 const uchar *ptrIn, int iStride, const float* gPtr, int ct, int x1, int x2) { 189 190 int len = x2 - x1; 191 192 while((x2 > x1) && (((uintptr_t)ptrIn) & 0x3)) { 193 const uchar *pi = ptrIn; 194 float blurredPixel = 0; 195 const float* gp = gPtr; 196 197 for (int r = 0; r < ct; r++) { 198 float pf = (float)pi[0]; 199 blurredPixel += pf * gp[0]; 200 pi += iStride; 201 gp++; 202 } 203 out[0] = blurredPixel; 204 x1++; 205 out++; 206 ptrIn++; 207 len--; 208 } 209 210#if defined(ARCH_ARM_HAVE_NEON) 211 if (x2 > x1) { 212 int t = (x2 - x1) >> 2; 213 t &= ~1; 214 if(t) { 215 rsdIntrinsicBlurVFU4_K(out, ptrIn, iStride, gPtr, ct, 0, t ); 216 len -= t << 2; 217 ptrIn += t << 2; 218 out += t << 2; 219 } 220 } 221#endif 222 223 while(len > 0) { 224 const uchar *pi = ptrIn; 225 float blurredPixel = 0; 226 const float* gp = gPtr; 227 228 for (int r = 0; r < ct; r++) { 229 float pf = (float)pi[0]; 230 blurredPixel += pf * gp[0]; 231 pi += iStride; 232 gp++; 233 } 234 out[0] = blurredPixel; 235 len--; 236 out++; 237 ptrIn++; 238 } 239} 240 241static void OneHU4(const RsForEachStubParamStruct *p, uchar4 *out, int32_t x, 242 const float4 *ptrIn, const float* gPtr, int iradius) { 243 244 float4 blurredPixel = 0; 245 for (int r = -iradius; r <= iradius; r ++) { 246 int validX = rsMax((x + r), 0); 247 validX = rsMin(validX, (int)(p->dimX - 1)); 248 float4 pf = ptrIn[validX]; 249 blurredPixel += pf * gPtr[0]; 250 gPtr++; 251 } 252 253 out->xyzw = convert_uchar4(blurredPixel); 254} 255 256static void OneHU1(const RsForEachStubParamStruct *p, uchar *out, int32_t x, 257 const float *ptrIn, const float* gPtr, int iradius) { 258 259 float blurredPixel = 0; 260 for (int r = -iradius; r <= iradius; r ++) { 261 int validX = rsMax((x + r), 0); 262 validX = rsMin(validX, (int)(p->dimX - 1)); 263 float pf = ptrIn[validX]; 264 blurredPixel += pf * gPtr[0]; 265 gPtr++; 266 } 267 268 out[0] = (uchar)blurredPixel; 269} 270 271 272void RsdCpuScriptIntrinsicBlur::kernelU4(const RsForEachStubParamStruct *p, 273 uint32_t xstart, uint32_t xend, 274 uint32_t instep, uint32_t outstep) { 275 276 float4 stackbuf[2048]; 277 float4 *buf = &stackbuf[0]; 278 RsdCpuScriptIntrinsicBlur *cp = (RsdCpuScriptIntrinsicBlur *)p->usr; 279 if (!cp->mAlloc.get()) { 280 ALOGE("Blur executed without input, skipping"); 281 return; 282 } 283 const uchar *pin = (const uchar *)cp->mAlloc->mHal.drvState.lod[0].mallocPtr; 284 const size_t stride = cp->mAlloc->mHal.drvState.lod[0].stride; 285 286 uchar4 *out = (uchar4 *)p->out; 287 uint32_t x1 = xstart; 288 uint32_t x2 = xend; 289 290 if (p->dimX > 2048) { 291 if ((p->dimX > cp->mScratchSize[p->lid]) || !cp->mScratch[p->lid]) { 292 cp->mScratch[p->lid] = realloc(cp->mScratch[p->lid], p->dimX * 16); 293 cp->mScratchSize[p->lid] = p->dimX; 294 } 295 buf = (float4 *)cp->mScratch[p->lid]; 296 } 297 float4 *fout = (float4 *)buf; 298 int y = p->y; 299 if ((y > cp->mIradius) && (y < ((int)p->dimY - cp->mIradius))) { 300 const uchar *pi = pin + (y - cp->mIradius) * stride; 301 OneVFU4(fout, pi, stride, cp->mFp, cp->mIradius * 2 + 1, x1, x2); 302 } else { 303 while(x2 > x1) { 304 OneVU4(p, fout, x1, y, pin, stride, cp->mFp, cp->mIradius); 305 fout++; 306 x1++; 307 } 308 } 309 310 x1 = xstart; 311 while ((x1 < (uint32_t)cp->mIradius) && (x1 < x2)) { 312 OneHU4(p, out, x1, buf, cp->mFp, cp->mIradius); 313 out++; 314 x1++; 315 } 316#if defined(ARCH_ARM_HAVE_NEON) 317 if ((x1 + cp->mIradius) < x2) { 318 rsdIntrinsicBlurHFU4_K(out, buf - cp->mIradius, cp->mFp, 319 cp->mIradius * 2 + 1, x1, x2 - cp->mIradius); 320 out += (x2 - cp->mIradius) - x1; 321 x1 = x2 - cp->mIradius; 322 } 323#endif 324 while(x2 > x1) { 325 OneHU4(p, out, x1, buf, cp->mFp, cp->mIradius); 326 out++; 327 x1++; 328 } 329} 330 331void RsdCpuScriptIntrinsicBlur::kernelU1(const RsForEachStubParamStruct *p, 332 uint32_t xstart, uint32_t xend, 333 uint32_t instep, uint32_t outstep) { 334 float buf[4 * 2048]; 335 RsdCpuScriptIntrinsicBlur *cp = (RsdCpuScriptIntrinsicBlur *)p->usr; 336 if (!cp->mAlloc.get()) { 337 ALOGE("Blur executed without input, skipping"); 338 return; 339 } 340 const uchar *pin = (const uchar *)cp->mAlloc->mHal.drvState.lod[0].mallocPtr; 341 const size_t stride = cp->mAlloc->mHal.drvState.lod[0].stride; 342 343 uchar *out = (uchar *)p->out; 344 uint32_t x1 = xstart; 345 uint32_t x2 = xend; 346 347 float *fout = (float *)buf; 348 int y = p->y; 349 if ((y > cp->mIradius) && (y < ((int)p->dimY - cp->mIradius -1))) { 350 const uchar *pi = pin + (y - cp->mIradius) * stride; 351 OneVFU1(fout, pi, stride, cp->mFp, cp->mIradius * 2 + 1, x1, x2); 352 } else { 353 while(x2 > x1) { 354 OneVU1(p, fout, x1, y, pin, stride, cp->mFp, cp->mIradius); 355 fout++; 356 x1++; 357 } 358 } 359 360 x1 = xstart; 361 while ((x1 < x2) && 362 ((x1 < (uint32_t)cp->mIradius) || (((uintptr_t)out) & 0x3))) { 363 OneHU1(p, out, x1, buf, cp->mFp, cp->mIradius); 364 out++; 365 x1++; 366 } 367#if defined(ARCH_ARM_HAVE_NEON) 368 if ((x1 + cp->mIradius) < x2) { 369 uint32_t len = x2 - (x1 + cp->mIradius); 370 len &= ~3; 371 if (len > 0) { 372 rsdIntrinsicBlurHFU1_K(out, ((float *)buf) - cp->mIradius, cp->mFp, 373 cp->mIradius * 2 + 1, x1, x1 + len); 374 out += len; 375 x1 += len; 376 } 377 } 378#endif 379 while(x2 > x1) { 380 OneHU1(p, out, x1, buf, cp->mFp, cp->mIradius); 381 out++; 382 x1++; 383 } 384} 385 386RsdCpuScriptIntrinsicBlur::RsdCpuScriptIntrinsicBlur(RsdCpuReferenceImpl *ctx, 387 const Script *s, const Element *e) 388 : RsdCpuScriptIntrinsic(ctx, s, e, RS_SCRIPT_INTRINSIC_ID_BLUR) { 389 390 mRootPtr = NULL; 391 if (e->getType() == RS_TYPE_UNSIGNED_8) { 392 switch (e->getVectorSize()) { 393 case 1: 394 mRootPtr = &kernelU1; 395 break; 396 case 4: 397 mRootPtr = &kernelU4; 398 break; 399 } 400 } 401 rsAssert(mRootPtr); 402 mRadius = 5; 403 404 mScratch = new void *[mCtx->getThreadCount()]; 405 mScratchSize = new size_t[mCtx->getThreadCount()]; 406 407 ComputeGaussianWeights(); 408} 409 410RsdCpuScriptIntrinsicBlur::~RsdCpuScriptIntrinsicBlur() { 411 uint32_t threads = mCtx->getThreadCount(); 412 if (mScratch) { 413 for (size_t i = 0; i < threads; i++) { 414 if (mScratch[i]) { 415 free(mScratch[i]); 416 } 417 } 418 delete []mScratch; 419 } 420 if (mScratchSize) { 421 delete []mScratchSize; 422 } 423} 424 425void RsdCpuScriptIntrinsicBlur::populateScript(Script *s) { 426 s->mHal.info.exportedVariableCount = 2; 427} 428 429void RsdCpuScriptIntrinsicBlur::invokeFreeChildren() { 430 mAlloc.clear(); 431} 432 433 434RsdCpuScriptImpl * rsdIntrinsic_Blur(RsdCpuReferenceImpl *ctx, const Script *s, const Element *e) { 435 436 return new RsdCpuScriptIntrinsicBlur(ctx, s, e); 437} 438 439 440