feat：创建所有需要用到的函数

FFmpegDemo/VideoPlay/VideoPlay/readthread.cpp

@@ -4,3 +4,33 @@ ReadThread::ReadThread(QObject *parent) : QThread(parent)
 {
 
 }
+
+ReadThread::~ReadThread()
+{
+
+}
+
+void ReadThread::open(const QString &url)
+{
+
+}
+
+void ReadThread::pause(bool flag)
+{
+
+}
+
+void ReadThread::close()
+{
+
+}
+
+const QString &ReadThread::url()
+{
+
+}
+
+void ReadThread::run()
+{
+
+}

FFmpegDemo/VideoPlay/VideoPlay/readthread.h

@@ -10,17 +10,44 @@
 #ifndef READTHREAD_H
 #define READTHREAD_H
 
+#include <QElapsedTimer>
 #include <QThread>
+#include <QTime>
+
+class VideoDecode;
 
 class ReadThread : public QThread
 {
     Q_OBJECT
+public:
+    enum PlayState      // 视频播放状态
+    {
+        play,
+        end
+    };
 public:
     explicit ReadThread(QObject *parent = nullptr);
+    ~ReadThread() override;
+
+    void open(const QString& url = QString());  // 打开视频
+    void pause(bool flag);                      // 暂停视频
+    void close();                               // 关闭视频
+    const QString& url();                       // 获取打开的视频地址
+
+protected:
+    void run() override;
 
 signals:
+    void updateImage(const QImage& image);      // 将读取到的视频图像发送出去
+    void playState(PlayState state);            // 视频播放状态发送改变时触发
 
-public slots:
+private:
+    VideoDecode* m_videoDecode = nullptr;       // 视频解码类
+    QString m_url;                              // 打开的视频地址
+    bool m_play   = false;                      // 播放控制
+    bool m_pause  = false;                      // 暂停控制
+    QElapsedTimer m_etime1;                     // 控制视频播放速度（更精确，但不支持视频后退）
+    QTime         m_etime2;                     // 控制视频播放速度（支持视频后退）
 };
 
 #endif // READTHREAD_H

FFmpegDemo/VideoPlay/VideoPlay/videodecode.cpp

@@ -4,3 +4,58 @@ VideoDecode::VideoDecode()
 {
 
 }
+
+VideoDecode::~VideoDecode()
+{
+
+}
+
+bool VideoDecode::open(const QString &url)
+{
+
+}
+
+QImage *VideoDecode::read()
+{
+
+}
+
+void VideoDecode::close()
+{
+
+}
+
+bool VideoDecode::isEnd()
+{
+
+}
+
+const qint64 &VideoDecode::pts()
+{
+
+}
+
+void VideoDecode::initFFmpeg()
+{
+
+}
+
+void VideoDecode::showError(int err)
+{
+
+}
+
+qreal VideoDecode::rationalToDouble(AVRational rational)
+{
+
+}
+
+void VideoDecode::clear()
+{
+
+}
+
+void VideoDecode::free()
+{
+
+}

FFmpegDemo/VideoPlay/VideoPlay/videodecode.h

@@ -10,11 +10,35 @@
 #ifndef VIDEODECODE_H
 #define VIDEODECODE_H
 
+#include <QString>
+
+struct AVFormatContext;
+struct AVCodecContext;
+struct AVRational;
+struct AVPacket;
+struct AVFrame;
+struct SwsContext;
+struct AVBufferRef;
+class QImage;
 
 class VideoDecode
 {
 public:
     VideoDecode();
+    ~VideoDecode();
+
+    bool open(const QString& url = QString());    // 打开媒体文件，或者流媒体rtmp、strp、http
+    QImage *read();                               // 读取视频图像
+    void close();                                 // 关闭
+    bool isEnd();                                 // 是否读取完成
+    const qint64& pts();                          // 获取当前帧显示时间
+
+private:
+    void initFFmpeg();                            // 初始化ffmpeg库（整个程序中只需加载一次）
+    void showError(int err);                      // 显示ffmpeg执行错误时的错误信息
+    qreal rationalToDouble(AVRational rational);  // 将AVRational转换为double
+    void clear();                                 // 清空读取缓冲
+    void free();                                  // 释放
 };
 
 #endif // VIDEODECODE_H

FFmpegDemo/VideoPlay/widget.cpp

@@ -15,3 +15,23 @@ Widget::~Widget()
     delete ui;
 }
 
+
+void Widget::on_but_file_clicked()
+{
+
+}
+
+void Widget::on_but_open_clicked()
+{
+
+}
+
+void Widget::on_but_pause_clicked()
+{
+
+}
+
+void Widget::on_playState(ReadThread::PlayState state)
+{
+
+}

FFmpegDemo/VideoPlay/widget.h

@@ -2,6 +2,7 @@
 #define WIDGET_H
 
 #include <QWidget>
+#include "readthread.h"
 
 QT_BEGIN_NAMESPACE
 namespace Ui { class Widget; }
@@ -15,7 +16,18 @@ public:
     Widget(QWidget *parent = nullptr);
     ~Widget();
 
+private slots:
+    void on_but_file_clicked();
+
+    void on_but_open_clicked();
+
+    void on_but_pause_clicked();
+
+    void on_playState(ReadThread::PlayState state);
+
 private:
     Ui::Widget *ui;
+
+    ReadThread* m_readThread = nullptr;
 };
 #endif // WIDGET_H