cavis/libnd4j/include/ops/declarable/helpers/cpu/imagesHelpers.cpp

137 lines
4.9 KiB
C++

/*******************************************************************************
* Copyright (c) 2019 Konduit K.K.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://www.apache.org/licenses/LICENSE-2.0.
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
//
// @author Oleh Semeniv (oleg.semeniv@gmail.com)
// @author Adel Rauf (rauf@konduit.ai)
//
#include <ops/declarable/helpers/adjust_hue.h>
#include <ops/declarable/helpers/imagesHelpers.h>
#include <helpers/ConstantTadHelper.h>
#include <execution/Threads.h>
namespace nd4j {
namespace ops {
namespace helpers {
template <typename T>
static void rgbToGrs_(const NDArray& input, NDArray& output, const int dimC) {
const T* x = input.bufferAsT<T>();
T* z = output.bufferAsT<T>();
const int rank = input.rankOf();
if(dimC == rank - 1 && 'c' == input.ordering() && 1 == input.ews() &&
'c' == output.ordering() && 1 == output.ews()){
auto func = PRAGMA_THREADS_FOR{
for (auto i = start; i < stop; i += increment) {
const auto xStep = i*3;
z[i] = 0.2989f*x[xStep] + 0.5870f*x[xStep + 1] + 0.1140f*x[xStep + 2];
}
};
samediff::Threads::parallel_for(func, 0, output.lengthOf(), 1);
return;
}
auto func = PRAGMA_THREADS_FOR{
Nd4jLong coords[MAX_RANK];
for (auto i = start; i < stop; i += increment) {
shape::index2coords(i, output.getShapeInfo(), coords);
const auto zOffset = shape::getOffset(output.getShapeInfo(), coords);
const auto xOffset0 = shape::getOffset(input.getShapeInfo(), coords);
const auto xOffset1 = xOffset0 + input.strideAt(dimC);
const auto xOffset2 = xOffset1 + input.strideAt(dimC);
z[zOffset] = 0.2989f*x[xOffset0] + 0.5870f*x[xOffset1] + 0.1140f*x[xOffset2];
}
};
samediff::Threads::parallel_for(func, 0, output.lengthOf(), 1);
return;
}
void transformRgbGrs(nd4j::LaunchContext* context, const NDArray& input, NDArray& output, const int dimC) {
BUILD_SINGLE_SELECTOR(input.dataType(), rgbToGrs_, (input, output, dimC), NUMERIC_TYPES);
}
template <typename T, typename Op>
FORCEINLINE static void tripleTransformer(const NDArray* input, NDArray* output, const int dimC, Op op) {
const int rank = input->rankOf();
const T* x = input->bufferAsT<T>();
T* z = output->bufferAsT<T>();
if (dimC == rank - 1 && input->ews() == 1 && output->ews() == 1 && input->ordering() == 'c' && output->ordering() == 'c') {
auto func = PRAGMA_THREADS_FOR{
for (auto i = start; i < stop; i += increment) {
op(x[i], x[i + 1], x[i + 2], z[i], z[i + 1], z[i + 2]);
}
};
samediff::Threads::parallel_for(func, 0, input->lengthOf(), 3);
}
else {
auto packX = nd4j::ConstantTadHelper::getInstance()->tadForDimensions(input->getShapeInfo(), dimC);
auto packZ = nd4j::ConstantTadHelper::getInstance()->tadForDimensions(output->getShapeInfo(), dimC);
const Nd4jLong numOfTads = packX.numberOfTads();
const Nd4jLong xDimCstride = input->stridesOf()[dimC];
const Nd4jLong zDimCstride = output->stridesOf()[dimC];
auto func = PRAGMA_THREADS_FOR{
for (auto i = start; i < stop; i += increment) {
const T* xTad = x + packX.platformOffsets()[i];
T* zTad = z + packZ.platformOffsets()[i];
op(xTad[0], xTad[xDimCstride], xTad[2 * xDimCstride], zTad[0], zTad[zDimCstride], zTad[2 * zDimCstride]);
}
};
samediff::Threads::parallel_tad(func, 0, numOfTads);
}
}
template <typename T>
FORCEINLINE static void hsvRgb(const NDArray* input, NDArray* output, const int dimC) {
auto op = nd4j::ops::helpers::hsvToRgb<T>;
return tripleTransformer<T>(input, output, dimC, op);
}
template <typename T>
FORCEINLINE static void rgbHsv(const NDArray* input, NDArray* output, const int dimC) {
auto op = nd4j::ops::helpers::rgbToHsv<T>;
return tripleTransformer<T>(input, output, dimC, op);
}
void transformHsvRgb(nd4j::LaunchContext* context, const NDArray* input, NDArray* output, const int dimC) {
BUILD_SINGLE_SELECTOR(input->dataType(), hsvRgb, (input, output, dimC), FLOAT_TYPES);
}
void transformRgbHsv(nd4j::LaunchContext* context, const NDArray* input, NDArray* output, const int dimC) {
BUILD_SINGLE_SELECTOR(input->dataType(), rgbHsv, (input, output, dimC), FLOAT_TYPES);
}
}
}
}