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GAPI (fluid): Sobel 3x3 optimization: remove needless file
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Latkin, Yevgeny I
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// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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//
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// Copyright (C) 2018 Intel Corporation
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#if !defined(GAPI_STANDALONE)
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#include "gfluidimgproc_func.hpp"
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#include "gfluidutils.hpp"
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#include <opencv2/core/hal/intrin.hpp>
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#include <cmath>
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#include <cstdlib>
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#ifdef __GNUC__
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# pragma GCC diagnostic push
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# pragma GCC diagnostic ignored "-Wstrict-overflow"
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#endif
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namespace cv {
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namespace gapi {
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namespace fluid {
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//---------------------
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//
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// Fluid kernels: Sobel
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//
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//---------------------
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// Sobel 3x3: vertical pass
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template<bool noscale, typename DST>
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void run_sobel3x3_vert(DST out[], int length, const float ky[],
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float scale, float delta, const int r[], float *buf[])
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{
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float ky0 = ky[0],
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ky1 = ky[1],
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ky2 = ky[2];
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int r0 = r[0],
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r1 = r[1],
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r2 = r[2];
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#if CV_SIMD
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// for floating-point output,
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// manual vectoring may be not better than compiler's optimization
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#define EXPLICIT_SIMD_32F 0 // 1=vectorize 32f case explicitly, 0=don't
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#if EXPLICIT_SIMD_32F
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if (std::is_same<DST, float>::value && length >= v_int16::nlanes)
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{
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constexpr static int nlanes = v_float32::nlanes;
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for (int l=0; l < length; )
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{
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for (; l <= length - nlanes; l += nlanes)
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{
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v_float32 sum = vx_load(&buf[r0][l]) * vx_setall_f32(ky0);
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sum = v_fma(vx_load(&buf[r1][l]), vx_setall_f32(ky1), sum);
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sum = v_fma(vx_load(&buf[r2][l]), vx_setall_f32(ky2), sum);
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if (!noscale)
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{
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sum = v_fma(sum, vx_setall_f32(scale), vx_setall_f32(delta));
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}
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v_store(reinterpret_cast<float*>(&out[l]), sum);
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}
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if (l < length)
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{
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// tail: recalculate last pixels
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GAPI_DbgAssert(length >= nlanes);
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l = length - nlanes;
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}
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}
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return;
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}
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#endif
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if ((std::is_same<DST, short>::value || std::is_same<DST, ushort>::value)
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&& length >= v_int16::nlanes)
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{
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constexpr static int nlanes = v_int16::nlanes;
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for (int l=0; l < length; )
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{
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for (; l <= length - nlanes; l += nlanes)
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{
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v_float32 sum0 = vx_load(&buf[r0][l]) * vx_setall_f32(ky0);
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sum0 = v_fma(vx_load(&buf[r1][l]), vx_setall_f32(ky1), sum0);
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sum0 = v_fma(vx_load(&buf[r2][l]), vx_setall_f32(ky2), sum0);
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v_float32 sum1 = vx_load(&buf[r0][l + nlanes/2]) * vx_setall_f32(ky0);
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sum1 = v_fma(vx_load(&buf[r1][l + nlanes/2]), vx_setall_f32(ky1), sum1);
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sum1 = v_fma(vx_load(&buf[r2][l + nlanes/2]), vx_setall_f32(ky2), sum1);
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if (!noscale)
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{
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sum0 = v_fma(sum0, vx_setall_f32(scale), vx_setall_f32(delta));
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sum1 = v_fma(sum1, vx_setall_f32(scale), vx_setall_f32(delta));
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}
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v_int32 isum0 = v_round(sum0),
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isum1 = v_round(sum1);
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if (std::is_same<DST, short>::value)
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{
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// signed short
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v_int16 res = v_pack(isum0, isum1);
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v_store(reinterpret_cast<short*>(&out[l]), res);
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} else
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{
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// unsigned short
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v_uint16 res = v_pack_u(isum0, isum1);
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v_store(reinterpret_cast<ushort*>(&out[l]), res);
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}
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}
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if (l < length)
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{
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// tail: recalculate last pixels
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GAPI_DbgAssert(length >= nlanes);
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l = length - nlanes;
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}
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}
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return;
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}
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if (std::is_same<DST, uchar>::value && length >= v_uint8::nlanes)
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{
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constexpr static int nlanes = v_uint8::nlanes;
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for (int l=0; l < length; )
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{
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for (; l <= length - nlanes; l += nlanes)
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{
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v_float32 sum0 = vx_load(&buf[r0][l]) * vx_setall_f32(ky0);
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sum0 = v_fma(vx_load(&buf[r1][l]), vx_setall_f32(ky1), sum0);
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sum0 = v_fma(vx_load(&buf[r2][l]), vx_setall_f32(ky2), sum0);
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v_float32 sum1 = vx_load(&buf[r0][l + nlanes/4]) * vx_setall_f32(ky0);
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sum1 = v_fma(vx_load(&buf[r1][l + nlanes/4]), vx_setall_f32(ky1), sum1);
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sum1 = v_fma(vx_load(&buf[r2][l + nlanes/4]), vx_setall_f32(ky2), sum1);
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v_float32 sum2 = vx_load(&buf[r0][l + 2*nlanes/4]) * vx_setall_f32(ky0);
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sum2 = v_fma(vx_load(&buf[r1][l + 2*nlanes/4]), vx_setall_f32(ky1), sum2);
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sum2 = v_fma(vx_load(&buf[r2][l + 2*nlanes/4]), vx_setall_f32(ky2), sum2);
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v_float32 sum3 = vx_load(&buf[r0][l + 3*nlanes/4]) * vx_setall_f32(ky0);
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sum3 = v_fma(vx_load(&buf[r1][l + 3*nlanes/4]), vx_setall_f32(ky1), sum3);
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sum3 = v_fma(vx_load(&buf[r2][l + 3*nlanes/4]), vx_setall_f32(ky2), sum3);
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if (!noscale)
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{
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sum0 = v_fma(sum0, vx_setall_f32(scale), vx_setall_f32(delta));
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sum1 = v_fma(sum1, vx_setall_f32(scale), vx_setall_f32(delta));
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sum2 = v_fma(sum2, vx_setall_f32(scale), vx_setall_f32(delta));
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sum3 = v_fma(sum3, vx_setall_f32(scale), vx_setall_f32(delta));
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}
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v_int32 isum0 = v_round(sum0),
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isum1 = v_round(sum1),
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isum2 = v_round(sum2),
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isum3 = v_round(sum3);
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v_int16 ires0 = v_pack(isum0, isum1),
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ires1 = v_pack(isum2, isum3);
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v_uint8 res = v_pack_u(ires0, ires1);
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v_store(reinterpret_cast<uchar*>(&out[l]), res);
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}
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if (l < length)
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{
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// tail: recalculate last pixels
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GAPI_DbgAssert(length >= nlanes);
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l = length - nlanes;
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}
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}
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return;
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}
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#endif
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// reference code
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for (int l=0; l < length; l++)
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{
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float sum = buf[r0][l]*ky0 + buf[r1][l]*ky1 + buf[r2][l]*ky2;
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if (!noscale)
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{
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sum = sum*scale + delta;
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}
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out[l] = saturate<DST>(sum, rintf);
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}
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}
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template<typename DST, typename SRC>
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void run_sobel_impl(DST out[], const SRC *in[], int width, int chan,
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const float kx[], const float ky[], int border,
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float scale, float delta, float *buf[],
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int y, int y0)
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{
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int r[3];
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r[0] = (y - y0) % 3; // buf[r[0]]: previous
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r[1] = (y - y0 + 1) % 3; // this
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r[2] = (y - y0 + 2) % 3; // next row
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int length = width * chan;
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// horizontal pass
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// full horizontal pass is needed only if very 1st row in ROI;
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// for 2nd and further rows, it is enough to convolve only the
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// "next" row - as we can reuse buffers from previous calls to
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// this kernel (note that Fluid processes rows consequently)
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int k0 = (y == y0)? 0: 2;
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for (int k = k0; k < 3; k++)
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{
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// previous, this , next pixel
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const SRC *s[3] = {in[k] - border*chan , in[k], in[k] + border*chan};
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// rely on compiler vectoring
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for (int l=0; l < length; l++)
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{
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buf[r[k]][l] = s[0][l]*kx[0] + s[1][l]*kx[1] + s[2][l]*kx[2];
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}
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}
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// vertical pass
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if (scale == 1 && delta == 0)
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{
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constexpr static bool noscale = true; // omit scaling
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run_sobel3x3_vert<noscale, DST>(out, length, ky, scale, delta, r, buf);
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} else
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{
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constexpr static bool noscale = false; // do scaling
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run_sobel3x3_vert<noscale, DST>(out, length, ky, scale, delta, r, buf);
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}
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}
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#define INSTANTIATE(DST, SRC) \
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template void run_sobel_impl(DST out[], const SRC *in[], int width, int chan, \
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const float kx[], const float ky[], int border, \
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float scale, float delta, float *buf[], \
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int y, int y0);
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INSTANTIATE(uchar , uchar )
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INSTANTIATE(ushort, ushort)
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INSTANTIATE( short, uchar )
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INSTANTIATE( short, ushort)
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INSTANTIATE( short, short)
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INSTANTIATE( float, uchar )
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INSTANTIATE( float, ushort)
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INSTANTIATE( float, short)
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INSTANTIATE( float, float)
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#undef INSTANTIATE
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} // namespace fliud
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} // namespace gapi
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} // namespace cv
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#endif // !defined(GAPI_STANDALONE)
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