QT应用编程: 基于mdk-sdk开发视频播放器

QT       += core gui
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets opengl
CONFIG += c++17 utf8_source
MDK_SDK = $$PWD/mdk-sdk
INCLUDEPATH += $$MDK_SDK/include
MDK_ARCH = x86
LIBS += -L$$MDK_SDK/lib/$$MDK_ARCH -lmdk
LIBS += -L$$MDK_SDK/bin/$$MDK_ARCH
# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
SOURCES += \
    QMDKWidget.cpp \
    main.cpp \
    widget.cpp
HEADERS += \
    QMDKWidget.h \
    widget.h
FORMS += \
    widget.ui
# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

/*
 * Copyright (c) 2020 WangBin <wbsecg1 at gmail.com>
 * MDK SDK with QOpenGLWindow example
 */
#pragma once
#include <QOpenGLWidget>
#include <memory>
namespace mdk {
class Player;
}
class QMDKWidget : public QOpenGLWidget
{
public:
    QMDKWidget(QWidget *parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags());
    ~QMDKWidget();
    void setDecoders(const QStringList& dec);
    void setMedia(const QString& url);
    void play();
    void pause();
    void stop();
    bool isPaused() const;
    void seek(qint64 ms);
    void snapshot();
    void setPlaybackRate(float value); //播放速度
    void setrotate(int degree);   //设置旋转
    void setMute(bool value);     //设置静音
    void setVolume(float value);  //设置音量
    int64_t duration(); //视频总时间
    int64_t position(); //当前进度
protected:
    void resizeGL(int w, int h) override;
    void paintGL() override;
private:
    std::shared_ptr<mdk::Player> player_;
};

#include "widget.h"
#include "ui_widget.h"
Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(timeout_update()));
}
Widget::~Widget()
{
    delete ui;
}
bool Widget::eventFilter(QObject *obj, QEvent *event)
{
    if(obj==ui->horizontalSlider)
    {
        if (event->type()==QEvent::MouseButtonPress)           //判断类型
        {
            QMouseEvent *mouseEvent = static_cast<QMouseEvent *>(event);
            if (mouseEvent->button() == Qt::LeftButton) //判断左键
            {
               int value = QStyle::sliderValueFromPosition(ui->horizontalSlider->minimum(), ui->horizontalSlider->maximum(), mouseEvent->pos().x(), ui->horizontalSlider->width());
               ui->horizontalSlider->setValue(value);
               //跳转播放器
               ui->AV_player->seek(value);
            }
        }
    }
    return QObject::eventFilter(obj,event);
}
//定时器超时
void Widget::timeout_update()
{
    int64_t pos=ui->AV_player->position();
    ui->horizontalSlider->setValue(pos);
    // 设置时间
    ui->label_t2->setText(QString("%1").arg(pos));
}
/*
工程: QMDK_Player
日期: 2021-03-31
作者: DS小龙哥
环境: win10 QT5.12.6 MinGW32
功能: 加载视频文件
*/
void Widget::on_pushButton_load_clicked()
{
    QString filename=QFileDialog::getOpenFileName(this,"选择打开的文件","C:/",tr("*.*"));
    ui->AV_player->setMedia(filename);
    ui->AV_player->play();
    QThread::msleep(100);
    //设置总时间
    ui->label_t1->setText(QString("%1").arg(ui->AV_player->duration()));
    //设置进度条滑块范围
    ui->horizontalSlider->setMinimum(0);
    ui->horizontalSlider->setMaximum(ui->AV_player->duration());
    //事件监听
    ui->horizontalSlider->installEventFilter(this);
    //开启定时器
    timer->start(100);
}
/*
工程: QMDK_Player
日期: 2021-03-31
作者: DS小龙哥
环境: win10 QT5.12.6 MinGW32
功能: 暂停/继续
*/
void Widget::on_pushButton_pause_clicked()
{
    timer->stop();
    ui->AV_player->pause();
}
/*
工程: QMDK_Player
日期: 2021-03-31
作者: DS小龙哥
环境: win10 QT5.12.6 MinGW32
功能: 重新播放
*/
void Widget::on_pushButton_reset_clicked()
{
    ui->AV_player->seek(0);
    ui->AV_player->play();
    timer->start(100);
}
/*
工程: QMDK_Player
日期: 2021-03-31
作者: DS小龙哥
环境: win10 QT5.12.6 MinGW32
功能: 播放
*/
void Widget::on_pushButton_play_clicked()
{
    ui->AV_player->play();
    timer->start(100);
}
/*
工程: QMDK_Player
日期: 2021-03-31
作者: DS小龙哥
环境: win10 QT5.12.6 MinGW32
功能: 停止播放
*/
void Widget::on_pushButton_stop_clicked()
{
    ui->AV_player->stop();
}
//静音设置
void Widget::on_pushButton_Volume_clicked()
{
    static bool value=false;
    value=!value;
    ui->AV_player->setMute(value);
}
//音量设置
void Widget::on_horizontalSlider_Volume_valueChanged(int value)
{
     ui->AV_player->setVolume(float(value/10.0));
}
//拍照. 保存到本地目录下png
void Widget::on_pushButton_snapshot_clicked()
{
    ui->AV_player->snapshot();
}
//设置速度
void Widget::on_comboBox_speed_currentTextChanged(const QString &arg1)
{
    qDebug()<<"速度:"<<arg1;
    ui->AV_player->setPlaybackRate(arg1.toDouble());
}

#ifndef WIDGET_H
#define WIDGET_H
#include <QWidget>
#include <QOpenGLWidget>
#include <memory>
#include "QMDKWidget.h"
#include <QFileDialog>
#include "QDebug"
#include <QThread>
#include <QMouseEvent>
#include <QStyle>
#include <QTimer>
namespace mdk {
class Player;
}
QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE
class Widget : public QWidget
{
    Q_OBJECT
public:
    Widget(QWidget *parent = nullptr);
    ~Widget();
private slots:
    void timeout_update();
    void on_pushButton_load_clicked();
    void on_pushButton_pause_clicked();
    void on_pushButton_reset_clicked();
    void on_pushButton_play_clicked();
    void on_pushButton_stop_clicked();
    void on_pushButton_Volume_clicked();
    void on_horizontalSlider_Volume_valueChanged(int value);
    void on_pushButton_snapshot_clicked();
    void on_comboBox_speed_currentTextChanged(const QString &arg1);
protected:
    bool eventFilter(QObject *obj, QEvent *event);
private:
    Ui::Widget *ui;
    QTimer *timer;
};
#endif // WIDGET_H