wehub-resource-sync
140 lines
4.0 KiB
C++
140 lines
4.0 KiB
C++
/*
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* SPDX-FileCopyrightText: Copyright (c) 1993-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <algorithm>
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#include <cassert>
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#include <fstream>
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#include <iostream>
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#include <memory>
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#include <numeric>
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#include <string>
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#include "NvInfer.h"
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#include "util.h"
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namespace util
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{
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size_t getMemorySize(const nvinfer1::Dims& dims, const int32_t elem_size)
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{
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return std::accumulate(dims.d, dims.d + dims.nbDims, 1, std::multiplies<int64_t>()) * elem_size;
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}
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ImageBase::ImageBase(const std::string& filename, const nvinfer1::Dims& dims)
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: mDims(dims)
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{
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assert(4 == mDims.nbDims);
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assert(1 == mDims.d[0]);
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mPPM.filename = filename;
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}
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size_t ImageBase::volume() const
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{
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return mDims.d[3] /* w */ * mDims.d[2] /* h */ * 3;
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}
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void ImageBase::read()
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{
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std::ifstream infile(mPPM.filename, std::ifstream::binary);
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if (!infile.is_open())
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{
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std::cerr << "ERROR: cannot open PPM image file: " << mPPM.filename << std::endl;
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}
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infile >> mPPM.magic >> mPPM.w >> mPPM.h >> mPPM.max;
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infile.seekg(1, infile.cur);
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mPPM.buffer.resize(volume());
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infile.read(reinterpret_cast<char*>(mPPM.buffer.data()), volume());
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infile.close();
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}
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void ImageBase::write()
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{
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std::ofstream outfile(mPPM.filename, std::ofstream::binary);
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if (!outfile.is_open())
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{
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std::cerr << "ERROR: cannot open PPM image file: " << mPPM.filename << std::endl;
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}
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outfile << mPPM.magic << " " << mPPM.w << " " << mPPM.h << " " << mPPM.max << std::endl;
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outfile.write(reinterpret_cast<char*>(mPPM.buffer.data()), volume());
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outfile.close();
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}
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RGBImageReader::RGBImageReader(const std::string& filename, const nvinfer1::Dims& dims, const std::vector<float>& mean, const std::vector<float>& std)
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: ImageBase(filename, dims)
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, mMean(mean)
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, mStd(std)
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{
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}
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std::unique_ptr<float> RGBImageReader::process() const
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{
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const int C = mDims.d[1];
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const int H = mDims.d[2];
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const int W = mDims.d[3];
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auto buffer = std::unique_ptr<float>{new float[volume()]};
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if (mPPM.h == H && mPPM.w == W)
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{
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for (int c = 0; c < C; c++)
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{
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for (int j = 0, HW = H * W; j < HW; ++j)
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{
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buffer.get()[c * HW + j] = (static_cast<float>(mPPM.buffer[j * C + c])/mPPM.max - mMean[c]) / mStd[c];
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}
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}
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}
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else
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{
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assert(!"Specified dimensions don't match PPM image");
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}
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return buffer;
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}
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ArgmaxImageWriter::ArgmaxImageWriter(const std::string& filename, const nvinfer1::Dims& dims, const std::vector<int>& palette, const int num_classes)
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: ImageBase(filename, dims)
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, mNumClasses(num_classes)
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, mPalette(palette)
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{
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}
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void ArgmaxImageWriter::process(const int* buffer)
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{
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mPPM.magic = "P6";
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mPPM.w = mDims.d[3];
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mPPM.h = mDims.d[2];
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mPPM.max = 255;
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mPPM.buffer.resize(volume());
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std::vector<std::vector<int>> colors;
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for (auto i = 0, max = mPPM.max; i < mNumClasses; i++)
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{
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std::vector<int> c{mPalette};
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std::transform(c.begin(), c.end(), c.begin(), [i, max](int p){return (p*i) % max;});
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colors.push_back(c);
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}
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for (int j = 0, HW = mPPM.h * mPPM.w; j < HW; ++j)
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{
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auto clsid{static_cast<uint8_t>(buffer[j])};
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mPPM.buffer.data()[j*3] = colors[clsid][0];
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mPPM.buffer.data()[j*3+1] = colors[clsid][1];
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mPPM.buffer.data()[j*3+2] = colors[clsid][2];
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}
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}
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}; // namespace util
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