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pawelsagpawelsag
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simple player in qt, still need some fixes
1 parent 3a2424a commit b15d92d

9 files changed

+698
-12
lines changed

‎ReadVideo/VideoOpenCv/VideoOpenCv.pro

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#-------------------------------------------------
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#
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# Project created by QtCreator 2018-08-09T01:31:30
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#
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#-------------------------------------------------
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QT += core gui
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greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
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TARGET = VideoOpenCv
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TEMPLATE = app
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# The following define makes your compiler emit warnings if you use
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# any feature of Qt which has been marked as deprecated (the exact warnings
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# depend on your compiler). Please consult the documentation of the
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# deprecated API in order to know how to port your code away from it.
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DEFINES += QT_DEPRECATED_WARNINGS
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# You can also make your code fail to compile if you use deprecated APIs.
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# In order to do so, uncomment the following line.
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# You can also select to disable deprecated APIs only up to a certain version of Qt.
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#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
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SOURCES += \
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main.cpp \
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mainwindow.cpp \
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helperfunctions.cpp
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HEADERS += \
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mainwindow.h
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FORMS += \
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mainwindow.ui
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INCLUDEPATH += $$PWD/../../../../../../usr/local/include
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DEPENDPATH += $$PWD/../../../../../../usr/local/include
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LIBS += -lopencv_core
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LIBS += -lstdc++ -lopencv_highgui -lopencv_core -lopencv_imgcodecs -lopencv_imgproc -lopencv_videoio -lopencv_video -lopencv_videostab

‎ReadVideo/VideoOpenCv/VideoOpenCv.pro.user

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‎ReadVideo/VideoOpenCv/helperfunctions.cpp

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#include<memory>
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bool isNumber(const char * str){
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int i =0;
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while(*str != 0 ){
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if( !isdigit(str[i]) )
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return false;
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i++;
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str++;
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}
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return true;
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}
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// note: this implementation does not disable this overload for array types
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template<typename T, typename... Args>
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std::unique_ptr<T> make_unique(Args&&... args)
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{
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return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
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}

‎ReadVideo/VideoOpenCv/main.cpp

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#include "mainwindow.h"
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#include <QApplication>
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int main(int argc, char *argv[])
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{
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QApplication a(argc, argv);
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MainWindow w(nullptr, "/home/windspring/c++Pro/opencvExamples/ReadVideo/Snow.mp4");
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w.show();
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return a.exec();
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}

‎ReadVideo/VideoOpenCv/mainwindow.cpp

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#include "mainwindow.h"
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#include "ui_mainwindow.h"
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#include "helperfunctions.cpp"
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#include <QDebug>
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#include <QInputEvent>
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#include <QPixmap>
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#include <QImage>
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#include "opencv2/core/core_c.h"
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#define RGBA2BGR 3
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using namespace cv;
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MainWindow::MainWindow(QWidget *parent, const char *fileName) :
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QMainWindow(parent),
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ui(new Ui::MainWindow)
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{
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if(!isNumber( fileName) )
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cap.open( String( fileName ) );
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else
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cap.open( atoi(fileName) );
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fps = cap.get( cv::CAP_PROP_FPS );
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cap.set(CV_CAP_PROP_FRAME_WIDTH,1920);
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cap.set(CV_CAP_PROP_FRAME_HEIGHT,1000);
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width = (int)cap.get(CAP_PROP_FRAME_WIDTH);
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height = (int)cap.get(CAP_PROP_FRAME_HEIGHT);
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frameCount = (int)cap.get(CAP_PROP_FRAME_COUNT);
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ui->setupUi(this);
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this->ui->TimeLine->setMaximum(frameCount);
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player = std::make_unique<std::thread>(&MainWindow::videoPlayerStart, this);
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}
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void MainWindow::keyPressEvent(QKeyEvent *event){
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switch (event->key()){
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case Qt::Key_S:
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status = PlayerStatus::PAUSE;
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currentFrame = cap.get(CV_CAP_PROP_POS_FRAMES);
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currentFrame++;
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this->setFrame();
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break;
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case Qt::Key_D:
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status = PlayerStatus::PAUSE;
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currentFrame = cap.get(CV_CAP_PROP_POS_FRAMES);
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currentFrame--;
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this->setFrame();
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break;
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case Qt::Key_Escape:
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status = PlayerStatus::EXIT;
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break;
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}
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}
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void MainWindow::videoPlayerStart()
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{
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Size size( width , height);
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writer.open( "output", CV_FOURCC('M','J','P','G'), fps, size );
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while(true){
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cap >> frame;
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if( frame.empty() )
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break;
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cvtColor(frame, frame, RGBA2BGR);
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ui->display->setPixmap((QPixmap::fromImage(QImage(frame.data, frame.cols, frame.rows, frame.step, QImage::Format_RGB888))));
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if(status == PlayerStatus::PAUSE)
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while( status == PlayerStatus::PAUSE){
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std::this_thread::sleep_for(std::chrono::milliseconds(100));
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}
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else if( status == PlayerStatus::EXIT )
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break;
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std::this_thread::sleep_for(std::chrono::milliseconds( 20 ));
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currentFrame++;
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this->ui->TimeLine->setValue(currentFrame);
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}
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}
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void MainWindow::setFrame(){
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cap.set(CV_CAP_PROP_POS_FRAMES,currentFrame);
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cap >> frame;
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cvtColor(frame, frame, RGBA2BGR);
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ui->display->setPixmap((QPixmap::fromImage(QImage(frame.data, frame.cols, frame.rows, frame.step, QImage::Format_RGB888))));
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}
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MainWindow::~MainWindow()
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{
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delete ui;
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status = PlayerStatus::EXIT;
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player->join();
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}
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void MainWindow::on_Play_released()
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{
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this->status = PlayerStatus::ACTIVE;
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}
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void MainWindow::on_pause_released()
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{
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this->status = PlayerStatus::PAUSE;
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}
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void MainWindow::on_TimeLine_sliderReleased()
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{
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}

‎ReadVideo/VideoOpenCv/mainwindow.h

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#ifndef MAINWINDOW_H
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#define MAINWINDOW_H
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#include <QMainWindow>
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#include "opencv2/highgui/highgui.hpp"
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#include "opencv2/imgproc/imgproc.hpp"
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#include "opencv2/core/cvstd.hpp"
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#include <opencv2/videoio/videoio_c.h>
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#include <chrono>
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#include <thread>
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namespace Ui {
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class MainWindow;
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}
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enum class PlayerStatus{
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ACTIVE,
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PAUSE,
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EXIT
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};
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class MainWindow : public QMainWindow
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{
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Q_OBJECT
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public:
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explicit MainWindow(QWidget *parent = 0, const char *fileName = "");
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void keyPressEvent(QKeyEvent *event);
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void videoPlayerStart();
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~MainWindow();
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private slots:
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void on_Play_released();
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void on_pause_released();
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void on_TimeLine_sliderReleased();
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private:
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Ui::MainWindow *ui;
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cv::VideoCapture cap;
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cv::Mat frame;
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cv::VideoWriter writer;
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int width, height, frameCount, currentFrame{0};
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double fps;
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std::unique_ptr<std::thread> player;
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PlayerStatus status;
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// private functions
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void setFrame();
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};
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#endif // MAINWINDOW_H

‎ReadVideo/VideoOpenCv/mainwindow.ui

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<?xml version="1.0" encoding="UTF-8"?>
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<ui version="4.0">
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<class>MainWindow</class>
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<widget class="QMainWindow" name="MainWindow">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>421</width>
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<height>306</height>
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</rect>
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</property>
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<property name="windowTitle">
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<string>MainWindow</string>
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</property>
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<widget class="QWidget" name="centralWidget">
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<layout class="QVBoxLayout" name="verticalLayout">
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<item>
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<layout class="QGridLayout" name="gridLayout">
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<item row="0" column="0">
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<widget class="QLabel" name="display">
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<property name="maximumSize">
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<size>
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<width>1900</width>
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<height>910</height>
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</size>
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</property>
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<property name="text">
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<string/>
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</property>
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</widget>
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</item>
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</layout>
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</item>
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<item>
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<widget class="QGroupBox" name="groupBox">
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<property name="sizePolicy">
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<sizepolicy hsizetype="Preferred" vsizetype="Preferred">
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<horstretch>0</horstretch>
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<verstretch>0</verstretch>
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</sizepolicy>
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</property>
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<property name="minimumSize">
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<size>
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<width>0</width>
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<height>100</height>
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</size>
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</property>
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<property name="maximumSize">
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<size>
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<width>16777215</width>
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<height>100</height>
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</size>
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</property>
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<property name="title">
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<string>Options</string>
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</property>
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<widget class="QPushButton" name="Play">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>30</y>
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<width>80</width>
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<height>25</height>
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</rect>
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</property>
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<property name="text">
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<string>Play</string>
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</property>
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</widget>
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<widget class="QPushButton" name="pause">
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<property name="geometry">
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<rect>
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<x>80</x>
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<y>30</y>
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<width>80</width>
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<height>25</height>
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</rect>
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</property>
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<property name="text">
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<string>Pause</string>
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</property>
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</widget>
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<widget class="QSlider" name="TimeLine">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>70</y>
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<width>381</width>
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<height>16</height>
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</rect>
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</property>
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<property name="sizePolicy">
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<sizepolicy hsizetype="Preferred" vsizetype="Fixed">
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<horstretch>1</horstretch>
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<verstretch>0</verstretch>
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</sizepolicy>
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</property>
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<property name="maximum">
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<number>100000</number>
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</property>
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<property name="orientation">
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<enum>Qt::Horizontal</enum>
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</property>
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</widget>
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</widget>
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</item>
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</layout>
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</widget>
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</widget>
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<layoutdefault spacing="6" margin="11"/>
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<resources/>
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<connections/>
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</ui>

‎ReadVideo/example2

-88 Bytes
Binary file not shown.

‎ReadVideo/example2.cpp

+15-12
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cap >> frame;
2828
if( frame.empty() )
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break;
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cv::imshow("Example2", frame);
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logPolar(
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frame,
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logpolar_frame,
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Point2f(
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frame.cols/2,
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frame.rows/2
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),
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40,
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WARP_FILL_OUTLIERS
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);
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// logPolar(
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// frame,
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// logpolar_frame,
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// Point2f(
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// frame.cols/2,
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// frame.rows/2
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// ),
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// 40,
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// WARP_FILL_OUTLIERS
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// );
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// writer << logpolar_frame;
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cvtColor(frame, logpolar_frame, COLOR_BGR2GRAY);
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Canny(logpolar_frame, logpolar_frame, 10,100,3,true);
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imshow("Logpolar",logpolar_frame);
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writer << logpolar_frame;
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if(cv::waitKey(1) >= 0 )
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break;
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}

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