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//
// Copyright © 2020 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "CvVideoFrameReader.hpp"
#include "CvWindowOutput.hpp"
#include "CvVideoFileWriter.hpp"
#include "NetworkPipeline.hpp"
#include "CmdArgsParser.hpp"
#include <fstream>
#include <iostream>
#include <map>
#include <random>
/*
* Reads the user supplied backend preference, splits it by comma, and returns an ordered vector
*/
std::vector<armnn::BackendId> GetPreferredBackendList(const std::string& preferredBackends)
{
std::vector<armnn::BackendId> backends;
std::stringstream ss(preferredBackends);
while(ss.good())
{
std::string backend;
std::getline( ss, backend, ',' );
backends.emplace_back(backend);
}
return backends;
}
/*
* Assigns a color to each label in the label set
*/
std::vector<std::tuple<std::string, od::BBoxColor>> AssignColourToLabel(const std::string& pathToLabelFile)
{
std::ifstream in(pathToLabelFile);
std::vector<std::tuple<std::string, od::BBoxColor>> labels;
std::string str;
std::default_random_engine generator;
std::uniform_int_distribution<int> distribution(0,255);
while (std::getline(in, str))
{
if(!str.empty())
{
od::BBoxColor c{
.colorCode = std::make_tuple(distribution(generator),
distribution(generator),
distribution(generator))
};
auto bboxInfo = std::make_tuple (str, c);
labels.emplace_back(bboxInfo);
}
}
return labels;
}
std::tuple<std::unique_ptr<od::IFrameReader<cv::Mat>>,
std::unique_ptr<od::IFrameOutput<cv::Mat>>>
GetFrameSourceAndSink(const std::map<std::string, std::string>& options) {
std::unique_ptr<od::IFrameReader<cv::Mat>> readerPtr;
std::unique_ptr<od::CvVideoFrameReader> reader = std::make_unique<od::CvVideoFrameReader>();
reader->Init(GetSpecifiedOption(options, VIDEO_FILE_PATH));
auto enc = reader->GetSourceEncodingInt();
auto fps = reader->GetSourceFps();
auto w = reader->GetSourceWidth();
auto h = reader->GetSourceHeight();
if (!reader->ConvertToRGB())
{
readerPtr = std::move(std::make_unique<od::CvVideoFrameReaderRgbWrapper>(std::move(reader)));
}
else
{
readerPtr = std::move(reader);
}
if(CheckOptionSpecified(options, OUTPUT_VIDEO_FILE_PATH))
{
std::string outputVideo = GetSpecifiedOption(options, OUTPUT_VIDEO_FILE_PATH);
auto writer = std::make_unique<od::CvVideoFileWriter>();
writer->Init(outputVideo, enc, fps, w, h);
return std::make_tuple<>(std::move(readerPtr), std::move(writer));
}
else
{
auto writer = std::make_unique<od::CvWindowOutput>();
writer->Init("Processed Video");
return std::make_tuple<>(std::move(readerPtr), std::move(writer));
}
}
int main(int argc, char *argv[])
{
std::map<std::string, std::string> options;
int result = ParseOptions(options, CMD_OPTIONS, argv, argc);
if (result != 0)
{
return result;
}
// Create the network options
od::ODPipelineOptions pipelineOptions;
pipelineOptions.m_ModelFilePath = GetSpecifiedOption(options, MODEL_FILE_PATH);
pipelineOptions.m_ModelName = GetSpecifiedOption(options, MODEL_NAME);
if(CheckOptionSpecified(options, PREFERRED_BACKENDS))
{
pipelineOptions.m_backends = GetPreferredBackendList((GetSpecifiedOption(options, PREFERRED_BACKENDS)));
}
else
{
pipelineOptions.m_backends = {"CpuAcc", "CpuRef"};
}
auto labels = AssignColourToLabel(GetSpecifiedOption(options, LABEL_PATH));
od::IPipelinePtr objectDetectionPipeline = od::CreatePipeline(pipelineOptions);
auto inputAndOutput = GetFrameSourceAndSink(options);
std::unique_ptr<od::IFrameReader<cv::Mat>> reader = std::move(std::get<0>(inputAndOutput));
std::unique_ptr<od::IFrameOutput<cv::Mat>> sink = std::move(std::get<1>(inputAndOutput));
if (!sink->IsReady())
{
std::cerr << "Failed to open video writer.";
return 1;
}
od::InferenceResults results;
std::shared_ptr<cv::Mat> frame = reader->ReadFrame();
//pre-allocate frames
cv::Mat processed;
while(!reader->IsExhausted(frame))
{
objectDetectionPipeline->PreProcessing(*frame, processed);
objectDetectionPipeline->Inference(processed, results);
objectDetectionPipeline->PostProcessing(results,
[&frame, &labels](od::DetectedObjects detects) -> void {
AddInferenceOutputToFrame(detects, *frame, labels);
});
sink->WriteFrame(frame);
frame = reader->ReadFrame();
}
sink->Close();
return 0;
}
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