rsdIntrinsicBlur.cpp revision 2207ab7e0f2d28382fe61ff002ddd58c4fa3fb99
1d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams/* 2d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * Copyright (C) 2012 The Android Open Source Project 3d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * 4d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * Licensed under the Apache License, Version 2.0 (the "License"); 5d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * you may not use this file except in compliance with the License. 6d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * You may obtain a copy of the License at 7d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * 8d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * http://www.apache.org/licenses/LICENSE-2.0 9d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * 10d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * Unless required by applicable law or agreed to in writing, software 11d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * distributed under the License is distributed on an "AS IS" BASIS, 12d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * See the License for the specific language governing permissions and 14d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams * limitations under the License. 15d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams */ 16d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 17d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 18d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams#include "rsdCore.h" 19d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams#include "rsdIntrinsics.h" 20d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams#include "rsdAllocation.h" 21d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 22d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams#include "rsdIntrinsicInlines.h" 23d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 24d85e283087ecd00760a0d8d0c9d8482cda845efcJason Samsusing namespace android; 25d85e283087ecd00760a0d8d0c9d8482cda845efcJason Samsusing namespace android::renderscript; 26d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 27d85e283087ecd00760a0d8d0c9d8482cda845efcJason Samsstruct ConvolveParams { 28d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float fp[104]; 29d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams short ip[104]; 30d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float radius; 31d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams int iradius; 32d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams ObjectBaseRef<Allocation> alloc; 33d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams}; 34d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 35d85e283087ecd00760a0d8d0c9d8482cda845efcJason Samsstatic void ComputeGaussianWeights(ConvolveParams *cp) { 36d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // Compute gaussian weights for the blur 37d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // e is the euler's number 38d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float e = 2.718281828459045f; 39d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float pi = 3.1415926535897932f; 40d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // g(x) = ( 1 / sqrt( 2 * pi ) * sigma) * e ^ ( -x^2 / 2 * sigma^2 ) 41d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // x is of the form [-radius .. 0 .. radius] 42d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // and sigma varies with radius. 43d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // Based on some experimental radius values and sigma's 44d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // we approximately fit sigma = f(radius) as 45d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // sigma = radius * 0.4 + 0.6 46d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // The larger the radius gets, the more our gaussian blur 47d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // will resemble a box blur since with large sigma 48d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // the gaussian curve begins to lose its shape 49d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float sigma = 0.4f * cp->radius + 0.6f; 50d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 51d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // Now compute the coefficients. We will store some redundant values to save 52d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams // some math during the blur calculations precompute some values 53d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float coeff1 = 1.0f / (sqrtf(2.0f * pi) * sigma); 54d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float coeff2 = - 1.0f / (2.0f * sigma * sigma); 55d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 56d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float normalizeFactor = 0.0f; 57d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float floatR = 0.0f; 58d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams int r; 59d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams cp->iradius = (float)ceil(cp->radius) + 0.5f; 60d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams for (r = -cp->iradius; r <= cp->iradius; r ++) { 61d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams floatR = (float)r; 62d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams cp->fp[r + cp->iradius] = coeff1 * powf(e, floatR * floatR * coeff2); 63d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams normalizeFactor += cp->fp[r + cp->iradius]; 64d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams } 65d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 66d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams //Now we need to normalize the weights because all our coefficients need to add up to one 67d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams normalizeFactor = 1.0f / normalizeFactor; 68d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams for (r = -cp->iradius; r <= cp->iradius; r ++) { 69d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams cp->fp[r + cp->iradius] *= normalizeFactor; 70d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams cp->ip[r + cp->iradius] = (short)(cp->ip[r + cp->iradius] * 32768); 71d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams } 72d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams} 73d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 74d85e283087ecd00760a0d8d0c9d8482cda845efcJason Samsstatic void Blur_Bind(const Context *dc, const Script *script, 75d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams void * intrinsicData, uint32_t slot, Allocation *data) { 76d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams ConvolveParams *cp = (ConvolveParams *)intrinsicData; 77d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams rsAssert(slot == 1); 78d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams cp->alloc.set(data); 79d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams} 80d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 81d85e283087ecd00760a0d8d0c9d8482cda845efcJason Samsstatic void Blur_SetVar(const Context *dc, const Script *script, void * intrinsicData, 82d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams uint32_t slot, void *data, size_t dataLength) { 83d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams ConvolveParams *cp = (ConvolveParams *)intrinsicData; 84d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams rsAssert(slot == 0); 85d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 86d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams cp->radius = ((const float *)data)[0]; 87d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams ComputeGaussianWeights(cp); 88d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams} 89d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 90d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 91d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 92d85e283087ecd00760a0d8d0c9d8482cda845efcJason Samsstatic void OneV(const RsForEachStubParamStruct *p, float4 *out, int32_t x, int32_t y, 93d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams const uchar *ptrIn, int iStride, const float* gPtr, int iradius) { 94d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 95d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams const uchar *pi = ptrIn + x*4; 96d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 97d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float4 blurredPixel = 0; 98d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams for (int r = -iradius; r <= iradius; r ++) { 99d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams int validY = rsMax((y + r), 0); 100d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams validY = rsMin(validY, (int)(p->dimY - 1)); 101d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams const uchar4 *pvy = (const uchar4 *)&pi[validY * iStride]; 102d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float4 pf = convert_float4(pvy[0]); 103d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams blurredPixel += pf * gPtr[0]; 104d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams gPtr++; 105d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams } 106d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 107d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams out->xyzw = blurredPixel; 108d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams} 109d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 110e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Samsextern "C" void rsdIntrinsicBlurVF_K(void *dst, const void *pin, int stride, const void *gptr, int rct, int x1, int x2); 111e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Samsextern "C" void rsdIntrinsicBlurHF_K(void *dst, const void *pin, const void *gptr, int rct, int x1, int x2); 112e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams 113e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Samsstatic void OneVF(float4 *out, 114e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams const uchar *ptrIn, int iStride, const float* gPtr, int ct, 115e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams int x1, int x2) { 116e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams 117e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams#if defined(ARCH_ARM_HAVE_NEON) 1182207ab7e0f2d28382fe61ff002ddd58c4fa3fb99Jason Sams { 1192207ab7e0f2d28382fe61ff002ddd58c4fa3fb99Jason Sams int t = (x2 - x1); 1202207ab7e0f2d28382fe61ff002ddd58c4fa3fb99Jason Sams t &= ~1; 1212207ab7e0f2d28382fe61ff002ddd58c4fa3fb99Jason Sams if(t) { 1222207ab7e0f2d28382fe61ff002ddd58c4fa3fb99Jason Sams rsdIntrinsicBlurVF_K(out, ptrIn, iStride, gPtr, ct, x1, x1 + t); 1232207ab7e0f2d28382fe61ff002ddd58c4fa3fb99Jason Sams } 1242207ab7e0f2d28382fe61ff002ddd58c4fa3fb99Jason Sams x1 += t; 1252207ab7e0f2d28382fe61ff002ddd58c4fa3fb99Jason Sams } 126e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams#endif 127e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams 128e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams while(x2 > x1) { 129e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams const uchar *pi = ptrIn + x1 * 4; 130e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams float4 blurredPixel = 0; 131e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams const float* gp = gPtr; 132e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams 133e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams for (int r = 0; r < ct; r++) { 134e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams float4 pf = convert_float4(((const uchar4 *)pi)[0]); 135e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams blurredPixel += pf * gp[0]; 136e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams pi += iStride; 137e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams gp++; 138e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams } 139e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams out->xyzw = blurredPixel; 140e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams x1++; 141e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams out++; 142e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams } 143e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams} 144e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams 145d85e283087ecd00760a0d8d0c9d8482cda845efcJason Samsstatic void OneH(const RsForEachStubParamStruct *p, uchar4 *out, int32_t x, 146d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams const float4 *ptrIn, const float* gPtr, int iradius) { 147d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 148d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float4 blurredPixel = 0; 149d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams for (int r = -iradius; r <= iradius; r ++) { 150d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams int validX = rsMax((x + r), 0); 151d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams validX = rsMin(validX, (int)(p->dimX - 1)); 152d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float4 pf = ptrIn[validX]; 153d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams blurredPixel += pf * gPtr[0]; 154d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams gPtr++; 155d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams } 156d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 157d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams out->xyzw = convert_uchar4(blurredPixel); 158d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams} 159d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 160d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 161d85e283087ecd00760a0d8d0c9d8482cda845efcJason Samsstatic void Blur_uchar4(const RsForEachStubParamStruct *p, 162d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams uint32_t xstart, uint32_t xend, 163d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams uint32_t instep, uint32_t outstep) { 164d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float buf[4 * 2048]; 165d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams ConvolveParams *cp = (ConvolveParams *)p->usr; 166d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams DrvAllocation *din = (DrvAllocation *)cp->alloc->mHal.drv; 167d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams const uchar *pin = (const uchar *)din->lod[0].mallocPtr; 168d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 169d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams uchar4 *out = (uchar4 *)p->out; 170d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams uint32_t x1 = xstart; 171d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams uint32_t x2 = xend; 172d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 173d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams float4 *fout = (float4 *)buf; 174e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams int y = p->y; 175e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams if ((y > cp->iradius) && (y < ((int)p->dimY - cp->iradius))) { 176e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams const uchar *pi = pin + (y - cp->iradius) * din->lod[0].stride; 177e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams OneVF(fout, pi, din->lod[0].stride, cp->fp, cp->iradius * 2 + 1, x1, x2); 178e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams } else { 179e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams while(x2 > x1) { 180e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams OneV(p, fout, x1, y, pin, din->lod[0].stride, cp->fp, cp->iradius); 181e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams fout++; 182e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams x1++; 183e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams } 184d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams } 185d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 186d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams x1 = xstart; 187e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams while ((x1 < (uint32_t)cp->iradius) && (x1 < x2)) { 188e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams OneH(p, out, x1, (float4 *)buf, cp->fp, cp->iradius); 189e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams out++; 190e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams x1++; 191e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams } 192e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams#if defined(ARCH_ARM_HAVE_NEON) 193e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams if ((x1 + cp->iradius) < x2) { 194e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams rsdIntrinsicBlurHF_K(out, ((float4 *)buf) - cp->iradius, cp->fp, cp->iradius * 2 + 1, x1, x2 - cp->iradius); 195e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams out += (x2 - cp->iradius) - x1; 196e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams x1 = x2 - cp->iradius; 197e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams } 198e78e514f3f209e594767e8ebc64f5df4be5b0b41Jason Sams#endif 199d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams while(x2 > x1) { 200d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams OneH(p, out, x1, (float4 *)buf, cp->fp, cp->iradius); 201d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams out++; 202d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams x1++; 203d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams } 204d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 205d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams} 206d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 207d85e283087ecd00760a0d8d0c9d8482cda845efcJason Samsvoid * rsdIntrinsic_InitBlur(const android::renderscript::Context *dc, 208d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams android::renderscript::Script *script, 209d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams RsdIntriniscFuncs_t *funcs) { 210d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 211d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams script->mHal.info.exportedVariableCount = 2; 212d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams funcs->bind = Blur_Bind; 213d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams funcs->setVar = Blur_SetVar; 214d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams funcs->root = Blur_uchar4; 215d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 216d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams ConvolveParams *cp = (ConvolveParams *)calloc(1, sizeof(ConvolveParams)); 217d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams cp->radius = 5; 218d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams ComputeGaussianWeights(cp); 219d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams return cp; 220d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams} 221d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 222d85e283087ecd00760a0d8d0c9d8482cda845efcJason Sams 223