127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
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#include "mpvplayer.h"
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// 唤醒函数
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static void wakeup(void *ctx)
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{
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// 此回调可从任何mpv线程调用（但也可以从调用mpv API的线程递归地返回）
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// 只是需要通知要唤醒的Qt GUI线程（以便它可以使用mpv_wait_event（）），并尽快返回
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MpvPlayer *mvpPlayer = (MpvPlayer *)ctx;
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emit mvpPlayer->mpv_events();
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}
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MpvPlayer::MpvPlayer(QWidget *parent) :
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QWidget(parent)
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{
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// 创建mvpPlayer
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create_mvpPlayer(parent);
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}
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MpvPlayer::~MpvPlayer()
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{
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if (mpv)
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mpv_terminate_destroy(mpv);
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}
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// 创建mvpPlayer
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void MpvPlayer::create_mvpPlayer(QWidget *videoWin)
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{
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// 创建mpv实例
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mpv = mpv_create();
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if (!mpv)
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throw std::runtime_error("can't create mpv instance");
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// 将视频子窗口的窗口ID传递给mpv wid选项
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int64_t wid = videoWin->winId();
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mpv_set_option(mpv, "wid", MPV_FORMAT_INT64, &wid);
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// 让我们通过MPV_EVENT_PROPERTY_CHANGE接收属性更改事件，如果这属性更改了
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mpv_observe_property(mpv, 0, "time-pos", MPV_FORMAT_DOUBLE);
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// 从这里开始，将调用唤醒功能。 回调可以来自任何线程，因此我们使用QueuedConnection机制以线程安全的方式中继唤醒
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connect(this, &MpvPlayer::mpv_events, this, &MpvPlayer::on_mpv_events,
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Qt::QueuedConnection);
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mpv_set_wakeup_callback(mpv, wakeup, this);
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// 判断mpv实例是否成功初始化
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if (mpv_initialize(mpv) < 0)
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throw std::runtime_error("mpv failed to initialize");
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}
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// 设置mpv属性
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void MpvPlayer::setProperty(const QString &name, const QString &value)
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{
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mpv_set_option_string(mpv, name.toLatin1().data(), value.toLatin1().data());
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}
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// 获得mpv属性
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QString MpvPlayer::getProperty(const QString &name) const
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{
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return (QString)mpv_get_property_string(mpv, name.toLatin1().data());
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}
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// 播放视频
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void MpvPlayer::play(QString filename)
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{
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if (mpv)
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{
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const QByteArray c_filename = filename.toUtf8();
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const char *args[] = {"loadfile", c_filename.data(), NULL};
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// 与mpv_command相同，但异步运行命令来避免阻塞，直到进程终止
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mpv_command_async(mpv, 0, args);
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}
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}
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// 这个槽函数由 wakeup()调用（通过mpv_events信号）
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void MpvPlayer::on_mpv_events()
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{
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// 处理所有事件，直到事件队列为空
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while (mpv)
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{
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mpv_event *event = mpv_wait_event(mpv, 0);
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if (event->event_id == MPV_EVENT_NONE)
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break;
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handle_mpv_event(event);
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}
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}
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// 处理mpv事件
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void MpvPlayer::handle_mpv_event(mpv_event *event)
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{
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switch (event->event_id)
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{
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// 属性改变事件发生
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case MPV_EVENT_PROPERTY_CHANGE:
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{
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mpv_event_property *prop = (mpv_event_property *)event->data;
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if (strcmp(prop->name, "time-pos") == 0)
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{
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if (prop->format == MPV_FORMAT_DOUBLE)
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{
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// 获得播放时间
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double time = *(double *)prop->data;
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qDebug() << "播放时间: " << QString::number(time, 10, 2);
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}
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else if (prop->format == MPV_FORMAT_NONE)
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{
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// 该属性不可用，可能意味着播放已停止
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emit mpv_palyEnd();
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qDebug() << "播放结束";
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}
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}
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}
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break;
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// palyer退出事件发生
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case MPV_EVENT_SHUTDOWN:
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{
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mpv_terminate_destroy(mpv);
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mpv = NULL;
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}
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break;
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default: ;
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}
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}
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