Qt编写安防视频监控系统10-视频轮询

void frmVideoPanel::poll()
{
    if (actionPoll->text() == "启动轮询视频") {
        actionPoll->setText("停止轮询视频");
    } else {
        actionPoll->setText("启动轮询视频");
    }

    //优先把图标切换,使得看起来反应很快
    IconFont::Instance()->setIcon(ui->btnPoll, App::Polling ? 0xea14 : 0xea13, iconSize);

    //启动和停止轮询
    if (!App::Polling) {
        //根据轮询画面数计算每次的url地址
        pollUrls.clear();
        for (int i = 0; i < DBData::IpcInfo_Count; i = i + App::PollType) {
            QStringList list;
            for (int j = i; j < i + App::PollType; j++) {
                if (j < DBData::IpcInfo_Count) {
                    list << (App::PollRtsp == 0 ? DBData::IpcInfo_RtspAddrMain.at(j) : DBData::IpcInfo_RtspAddrSub.at(j));
                }
            }

            pollUrls << list.join("|");
        }

        //删除所有视频,切换到对应的轮询通道画面数
        delete_video_all();
        if (App::PollType == 1) {
            ui->btnVideo1->click();
        } else if (App::PollType == 4) {
            ui->btnVideo4->click();
        } else if (App::PollType == 9) {
            ui->btnVideo9->click();
        } else if (App::PollType == 16) {
            ui->btnVideo16->click();
        }

        QUIHelper::sleep(500);

        //立马启动轮询,并执行一次
        timerPoll->start(App::PollInterval * 1000);
        pollIndex = 0;
        polling();
    } else {
        timerPoll->stop();
    }

    App::Polling = !App::Polling;
    App::writeConfig();
    DeviceHelper::addMsg(App::Polling ? "所有通道 启动轮询" : "所有通道 停止轮询");
}

void frmVideoPanel::polling()
{
    //如果摄像头列表数量为空则停止定时器
    if (DBData::IpcInfo_Count == 0) {
        timerPoll->stop();
        return;
    }

    if (pollIndex == pollUrls.count()) {
        pollIndex = 0;
    }

    QStringList list = pollUrls.at(pollIndex).split("|");
    pollIndex++;

    //方式1为立即加载,方式2为排队加载,建议方式2
#if 0
    for (int i = 0; i < list.count(); i++) {
        widgets.at(i)->close();
        widgets.at(i)->setUrl(list.at(i));
        widgets.at(i)->open();
    }
#else
    QStringList urls;
    for (int i = 0; i < App::VideoCount; i++) {
        if (i < list.count()) {
            urls << list.at(i);
        } else {
            urls << "";
        }
    }

#ifdef videovlc
    VideoVlc::Instance()->setUrls(urls);
    VideoVlc::Instance()->start();
#elif videoffmpeg
    VideoFFmpeg::Instance()->setUrls(urls);
    VideoFFmpeg::Instance()->start();
#elif easyplayer
    VideoEasyPlayer::Instance()->setUrls(urls);
    VideoEasyPlayer::Instance()->start();
#elif haikang
    VideoHaiKang::Instance()->setUrls(urls);
    VideoHaiKang::Instance()->start();
#endif

#endif
}