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add VideoDecoding sample
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‎README.md‎

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@@ -17,6 +17,7 @@ This repository contains multiple samples that demonstrates how to use the <a hr
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|---|---|
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| [`ReadAnImage`](Samples/HelloWorld/ReadAnImage) | This sample demonstrates the simplest way to read barcodes from an image file and output barcode format and text. |
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| [`ReadMultipleImages`](Samples/HelloWorld/ReadMultipleImages) | This sample demonstrates the simplest way to read barcodes from directory with image files and output barcode format and text. |
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| [`VideoDecoding`](Samples/VideoDecoding) | This sample demonstrates how to read barcodes from video frames. |
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## License
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‎Samples/VideoDecoding/CMakeLists.txt‎

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cmake_minimum_required(VERSION 3.6)
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project(VideoDecoding)
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set(DBRLIB ${CMAKE_CURRENT_SOURCE_DIR}/../../Distributables/Lib/Linux/x64)
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set (CMAKE_CXX_STANDARD 11)
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add_compile_options(-O2 -fPIC)
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set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -O2 -fvisibility=hidden -fvisibility-inlines-hidden -L ${DBRLIB} -Wl,-rpath,${DBRLIB} -Wl,-rpath,'$ORIGIN' -static-libgcc -static-libstdc++ -s")
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find_package(OpenCV 3.4.5 REQUIRED)
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include_directories(${CMAKE_CURRENT_SOURCE_DIR}/thirdLib/Include)
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file(GLOB FILE_SRCS
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VideoDecoding.cpp
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)
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add_executable(VideoDecoding ${FILE_SRCS})
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set_target_properties(VideoDecoding PROPERTIES SKIP_BUILD_RPATH TRUE)
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target_link_libraries(VideoDecoding DynamsoftCaptureVisionRouter DynamsoftLicense DynamsoftUtility DynamsoftCore opencv_core opencv_videoio opencv_highgui)
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File(COPY ${CMAKE_CURRENT_SOURCE_DIR}/../../Distributables/DBR-PresetTemplates.json DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/../../Distributables/Lib/Linux/x64)

‎Samples/VideoDecoding/VideoDecoding.cpp‎

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#include <opencv2/core.hpp>
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#include <opencv2/videoio.hpp>
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#include <opencv2/highgui.hpp>
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#include <iostream>
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#include <vector>
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#include <chrono>
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// Include headers of DynamsoftCaptureVisionRouter SDK
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#include <iostream>
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#include <string>
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#include "../../Include/DynamsoftCaptureVisionRouter.h"
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#include "../../Include/DynamsoftUtility.h"
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using namespace std;
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using namespace dynamsoft::license;
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using namespace dynamsoft::cvr;
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using namespace dynamsoft::dbr;
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using namespace dynamsoft::utility;
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using namespace cv;
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#if defined(_WIN64) || defined(_WIN32)
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#ifdef _WIN64
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#pragma comment(lib, "../../Distributables/Lib/Windows/x64/DynamsoftCorex64.lib")
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#pragma comment(lib, "../../Distributables/Lib/Windows/x64/DynamsoftLicensex64.lib")
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#pragma comment(lib, "../../Distributables/Lib/Windows/x64/DynamsoftCaptureVisionRouterx64.lib")
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#pragma comment(lib, "../../Distributables/Lib/Windows/x64/DynamsoftUtilityx64.lib")
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#else
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#pragma comment(lib, "../../Distributables/Lib/Windows/x86/DynamsoftCorex86.lib")
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#pragma comment(lib, "../../Distributables/Lib/Windows/x86/DynamsoftLicensex86.lib")
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#pragma comment(lib, "../../Distributables/Lib/Windows/x86/DynamsoftCaptureVisionRouterx86.lib")
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#pragma comment(lib, "../../Distributables/Lib/Windows/x86/DynamsoftUtilityx86.lib")
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#endif
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#endif
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class MyCapturedResultReceiver : public CCapturedResultReceiver {
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virtual void OnDecodedBarcodesReceived(CDecodedBarcodesResult* pResult)override
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{
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if (pResult->GetErrorCode() != EC_OK)
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{
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cout << "Error: " << pResult->GetErrorString() << endl;
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}
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else
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{
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auto tag = pResult->GetOriginalImageTag();
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if (tag)
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cout << "ImageID:" << tag->GetImageId() << endl;
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int count = pResult->GetItemsCount();
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cout << "Decoded " << count << " barcodes" << endl;
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for (int i = 0; i < count; i++) {
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const CBarcodeResultItem* barcodeResultItem = pResult->GetItem(i);
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if (barcodeResultItem != NULL)
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{
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cout << "Result " << i + 1 << endl;
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cout << "Barcode Format: " << barcodeResultItem->GetFormatString() << endl;
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cout << "Barcode Text: " << barcodeResultItem->GetText() << endl;
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}
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}
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}
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cout << endl;
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}
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};
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class MyVideoFetcher : public CImageSourceAdapter
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{
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public:
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MyVideoFetcher(){};
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~MyVideoFetcher(){};
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bool HasNextImageToFetch()const override
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{
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return true;
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}
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void MyAddImageToBuffer(const CImageData* img, bool bClone = true)
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{
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AddImageToBuffer(img, bClone);
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}
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};
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int main()
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{
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cout << "Opening camera..." << endl;
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VideoCapture capture(0); // open the first camera
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if (!capture.isOpened())
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{
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cerr << "ERROR: Can't initialize camera capture" << endl;
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cout << "Press any key to quit..." << endl;
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cin.ignore();
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return 1;
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}
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int iRet = -1;
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char szErrorMsg[256];
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// Initialize license.
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// The string "DLS2eyJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSJ9" here is a free public trial license. Note that network connection is required for this license to work.
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// If you don't have a license yet, you can request a trial from https://www.dynamsoft.com/customer/license/trialLicense?product=dbr&utm_source=samples&package=c_cpp
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iRet = CLicenseManager::InitLicense("DLS2eyJvcmdhbml6YXRpb25JRCI6IjIwMDAwMSJ9", szErrorMsg, 256);
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if (iRet != EC_OK)
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{
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cout << szErrorMsg << endl;
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}
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int errorCode = 1;
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char errorMsg[512] = { 0 };
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CCaptureVisionRouter *cvr = new CCaptureVisionRouter;
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MyVideoFetcher *fetcher = new MyVideoFetcher();
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fetcher->SetMaxImageCount(100);
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fetcher->SetBufferOverflowProtectionMode(BOPM_UPDATE);
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fetcher->SetColourChannelUsageType(CCUT_AUTO);
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cvr->SetInput(fetcher);
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CMultiFrameResultCrossFilter* filter = new CMultiFrameResultCrossFilter;
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filter->EnableResultCrossVerification(CRIT_BARCODE, true);
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filter->EnableResultDeduplication(CRIT_BARCODE, true);
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filter->SetDuplicateForgetTime(CRIT_BARCODE, 5000);
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cvr->AddResultFilter(filter);
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CCapturedResultReceiver *capturedReceiver = new MyCapturedResultReceiver;
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cvr->AddResultReceiver(capturedReceiver);
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errorCode = cvr->StartCapturing(CPresetTemplate::PT_READ_BARCODES, false, errorMsg, 512);
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if (errorCode != EC_OK)
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{
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cout << "error:" << errorMsg << endl;
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}
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else
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{
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for (int i = 1;; ++i)
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{
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auto start = std::chrono::high_resolution_clock::now();
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Mat frame;
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capture.read(frame);
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if (frame.empty())
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{
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cerr << "ERROR: Can't grab camera frame." << endl;
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break;
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}
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CFileImageTag tag(nullptr, 0, 0);
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tag.SetImageId(i);
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CImageData data(frame.rows * frame.step.p[0],
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frame.data,
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capture.get(CAP_PROP_FRAME_WIDTH),
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capture.get(CAP_PROP_FRAME_HEIGHT),
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frame.step.p[0],
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IPF_RGB_888,
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0,
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&tag);
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fetcher->MyAddImageToBuffer(&data);
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imshow("Frame", frame);
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auto finish = std::chrono::high_resolution_clock::now();
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auto elapsed = std::chrono::duration_cast<std::chrono::milliseconds>(finish - start);
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int usingTime = elapsed.count();
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int key = 1;
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if (usingTime < 40)
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key = 40 - usingTime;
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key = waitKey(key);
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if (key == 27/*ESC*/)
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break;
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}
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cvr->StopCapturing();
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}
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capture.release();
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delete cvr, cvr = NULL;
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delete fetcher, fetcher = NULL;
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delete filter, filter = NULL;
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delete capturedReceiver, capturedReceiver = NULL;
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cout << "Press any key to quit..." << endl;
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cin.ignore();
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return 0;
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}

‎Samples/VideoDecoding/VideoDecoding.vcxproj‎

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<?xml version="1.0" encoding="utf-8"?>
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<Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<ItemGroup Label="ProjectConfigurations">
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<ProjectConfiguration Include="Release|Win32">
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<Configuration>Release</Configuration>
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<Platform>Win32</Platform>
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</ProjectConfiguration>
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</ItemGroup>
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<PropertyGroup Label="Globals">
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<ProjectGuid>{6BAC218D-AD85-4749-9694-0B8A8547596B}</ProjectGuid>
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<Keyword>Win32Proj</Keyword>
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<RootNamespace>VideoDecoding</RootNamespace>
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<WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
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<ProjectName>VideoDecoding</ProjectName>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
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<ConfigurationType>Application</ConfigurationType>
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<UseDebugLibraries>false</UseDebugLibraries>
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<PlatformToolset>v110</PlatformToolset>
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<WholeProgramOptimization>true</WholeProgramOptimization>
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<CharacterSet>Unicode</CharacterSet>
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</PropertyGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
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<ImportGroup Label="ExtensionSettings">
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</ImportGroup>
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<ImportGroup Label="Shared">
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</ImportGroup>
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<ImportGroup Label="PropertySheets" Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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</ImportGroup>
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<PropertyGroup Label="UserMacros" />
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<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<LinkIncremental>false</LinkIncremental>
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<OutDir>$(SolutionDir)$(Platform)\</OutDir>
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<IntDir>$(Platform)\$(Configuration)\</IntDir>
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</PropertyGroup>
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<ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'">
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<ClCompile>
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<WarningLevel>Level3</WarningLevel>
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<PrecompiledHeader>
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</PrecompiledHeader>
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<Optimization>MaxSpeed</Optimization>
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<FunctionLevelLinking>true</FunctionLevelLinking>
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<IntrinsicFunctions>true</IntrinsicFunctions>
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<PreprocessorDefinitions>WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
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<AdditionalIncludeDirectories>thirdLib\Include;</AdditionalIncludeDirectories>
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</ClCompile>
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<Link>
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<SubSystem>Console</SubSystem>
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<EnableCOMDATFolding>true</EnableCOMDATFolding>
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<OptimizeReferences>true</OptimizeReferences>
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<GenerateDebugInformation>true</GenerateDebugInformation>
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<AdditionalDependencies>opencv_core345.lib;opencv_videoio345.lib;opencv_highgui345.lib;%(AdditionalDependencies)</AdditionalDependencies>
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<AdditionalLibraryDirectories>thirdLib\lib\$(Configuration)</AdditionalLibraryDirectories>
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</Link>
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<PostBuildEvent>
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<Command>copy "thirdLib\bin\$(Configuration)\*.*" "$(OutputPath)"
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xcopy /ys "$(SolutionDir)..\..\Distributables\Lib\Windows\$(PlatformTarget)\*.dll" "$(OutputPath)"
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xcopy /ys "$(SolutionDir)..\..\Distributables\*.json" "$(OutputPath)"</Command>
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</PostBuildEvent>
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</ItemDefinitionGroup>
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<ItemGroup>
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<ClCompile Include="VideoDecoding.cpp" />
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</ItemGroup>
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<Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
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<ImportGroup Label="ExtensionTargets">
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</ImportGroup>
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</Project>

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