FFmpeg: 自实现ijkplayer播放器--03UI界面设计

文章目录

• • • UI设计流程图
    • UI设计界面
    • 点击播放功能实现

      UI设计流程图

      

      UI设计界面

      • 主界面

        

      • 控制条

        

      • 播放列表

        

      • 画面显示

        

      • 标题栏

        

      • 设置界面

        

      • 提示框

        

        点击播放功能实现

        槽函数实现：

        connect(ui->ctrlBarWind, &CtrlBar::SigPlayOrPause, this, &MainWind::OnPlayOrPause);

        ctrbar.h

        class CtrlBar : public QWidget
        {
            Q_OBJECT
        public:
            explicit CtrlBar(QWidget *parent = 0);
            ~CtrlBar();
        signals:
            void SigPlayOrPause();      // 先实现这个
        private slots:
            void on_playOrPauseBtn_clicked();
            void on_stopBtn_clicked();
        private:
            Ui::CtrlBar *ui;
        };
        

        ctrbar.cpp

        CtrlBar::CtrlBar(QWidget *parent) :
            QWidget(parent),
            ui(new Ui::CtrlBar)
        {
            ui->setupUi(this);
        }
        CtrlBar::~CtrlBar()
        {
            delete ui;
        }
        void CtrlBar::on_playOrPauseBtn_clicked()
        {
            qDebug() 
            Q_OBJECT
        public:
            explicit MainWind(QWidget *parent = 0);
            ~MainWind();
            int InitSignalsAndSlots();
            void OnPlayOrPause();
        private:
            Ui::MainWind *ui;
            IjkMediaPlayer *mp_ = NULL;
        };
        
            ui-setupUi(this);
            // 初始化信号槽相关的
            InitSignalsAndSlots();
        }
        MainWind::~MainWind()
        {
            delete ui;
        }
        int MainWind::InitSignalsAndSlots()
        {
            connect(ui->ctrlBarWind, &CtrlBar::SigPlayOrPause, this, &MainWind::OnPlayOrPause);
        }
        int MainWind::message_loop(void *arg)
        {
            IjkMediaPlayer *mp = (IjkMediaPlayer *)arg;
          
            while (1) {
                AVMessage msg;
                int retval = mp->ijkmp_get_msg(&msg, 1);    
                if (retval ijkmp_start();
                    break;
                default:
                  break;
                }
                msg_free_res(&msg);
        }
              
        void MainWind::OnPlayOrPause()
        {
            int ret = 0;
            // 1. 先检测mp是否已经创建
            if(!mp_) {
                mp_ = new IjkMediaPlayer();
                //1.1 创建
                ret = mp_->ijkmp_create(std::bind(&MainWind::message_loop, this, std::placeholders::_1));
                if(ret 
                    delete mp_;
                    mp_ = NULL;
                    return;
                }
                // 1.2 设置url
                mp_-ijkmp_set_data_source("m1.mp3");
                // 1.3 准备工作
                ret = mp_->ijkmp_prepare_async();
                if(ret 
                    delete mp_;
                    mp_ = NULL;
                    return;
                }
            } else {
                // 已经准备好了，则暂停或者恢复播放
            }
        }