cockpit-demo/test-ffmpeg/VedioClient/mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

#include <QFileDialog>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    this->setWindowTitle(QString("Qt+ffmpeg视频播放（硬解码）"));
    m_playImages.append(ui->widget);
    m_playImages.append(ui->widget_3);
    m_playImages.append(ui->widget_4);
    m_playImages.append(ui->widget_5);
    m_playImages.append(ui->widget_6);
    m_playImages.append(ui->widget_7);
    for(int i = 0; i < m_playImages.count(); i++)
    {
        m_readThreads.append(new ReadThread);
        connect(m_readThreads.at(i), &ReadThread::updateImage, m_playImages.at(i), &PlayImage::updateImage);  // 这里使用Qt::DirectConnection会大幅度降低性能
    }
    connect(m_readThreads.at(0), &ReadThread::playState, this, &MainWindow::on_playState);
}

MainWindow::~MainWindow()
{
    delete ui;
}

/**
 * @brief  获取本地视频路径
 */
void MainWindow::on_btn_file_clicked()
{
    QString strName = QFileDialog::getOpenFileName(this, "选择播放视频~！", "/", "视频 (*.mp4 *.m4v *.mov *.avi *.flv);; 其它(*)");
    if(strName.isEmpty())
    {
        return;
    }
    ui->com_url->setCurrentText(strName);
}

/**
 * @brief  视频播放/停止
 */
void MainWindow::on_btn_start_clicked()
{
    if(ui->btn_start->text() == "开始播放")
    {
        for(int i = 0; i < m_readThreads.count(); i++)
        {
            m_readThreads.at(i)->setHWDecoder(ui->check_HW->isChecked());
            m_readThreads.at(0)->open("C:/Users/admin/Desktop/原文件/1.2023年度大事记.mp4");
            m_readThreads.at(1)->open("C:/Users/admin/Desktop/原文件/2.赵.mp4");
            m_readThreads.at(2)->open("https://www.douyu.com/96291?dyshid=1937d4e1-3332100244c16a702808d75e00031701&dyshci=1");
        }
    }
    else
    {
        for(int i = 0; i < m_readThreads.count(); i++)
        {
            m_readThreads.at(i)->close();
        }
    }

}

/**
    * @brief 视频暂停/继续
        */
void MainWindow::on_btn_pause_clicked()
{
    if(ui->btn_pause->text() == "暂停")
    {
        for(int i = 0; i < m_readThreads.count(); i++)
        {
            m_readThreads.at(i)->pause(true);
        }
        ui->btn_pause->setText("继续");
    }
    else
    {
        for(int i = 0; i < m_readThreads.count(); i++)
        {
            m_readThreads.at(i)->pause(false);
        }
        ui->btn_pause->setText("暂停");
    }

}

/**
 * @brief        根据视频播放状态切换界面设置
 * @param state
 */
void MainWindow::on_playState(ReadThread::PlayState state)
{
    if(state == ReadThread::play)
    {
        this->setWindowTitle(QString("正在播放：%1").arg(m_readThreads.at(0)->url()));
        ui->btn_start->setText("停止播放");
    }
    else
    {
        ui->btn_start->setText("开始播放");
        ui->btn_pause->setText("暂停");
        this->setWindowTitle(QString("Qt+ffmpeg视频播放（硬解码)"));
    }
}