QT 创建一个线程播放监控视频

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1.创建一个线程类(PlayVideoThread)：

PlayVideoThread.h头文件

#pragma once#include <QObject>
#include "DataDefine.h"
#include "hi_sdk_api.h"class PlayVideoThread : public QObject
{
Q_OBJECTpublic:
PlayVideoThread();
~PlayVideoThread();
void setParam(VIDEO_CHANNEL ch, int win);public slots:
void doWork();signals:
void sglOnMessage(VIDEO_STATUS_EVENT event, QString msg);signals:
void sglSendHandle(HI_HANDLE loginHandle, HI_S32 play);private:
VIDEO_CHANNEL m_Ch;
int m_Win; HI_HANDLE m_lLoginHandle;
HI_S32 m_lPlay;
};

PlayVideoThread.cpp源文件

#include "PlayVideoThread.h"PlayVideoThread::PlayVideoThread()
{
}PlayVideoThread::~PlayVideoThread()
{
}void PlayVideoThread::setParam(VIDEO_CHANNEL ch, int win)
{
m_Ch = ch;
m_Win = win;
}void PlayVideoThread::doWork()
{
HI_S32 err; /* 成功将返回 HI_HANDLE 句柄，失败返回 0 */
m_lLoginHandle = HI_SDK_Login(m_Ch.device.ip.toStdString().c_str(), m_Ch.device.user.toStdString().c_str(), m_Ch.device.password.toStdString().c_str(), m_Ch.device.port, &err); emit sglOnMessage(m_lLoginHandle == ? E_LOGIN_FAILURE : E_LOGIN_SUCCESS, "login err");
emit sglOnMessage(E_DEBUG_LOG, m_lLoginHandle == ? "login err" : "login success"); HI_S_STREAM_INFO info;
info.u32Channel = HI_CHANNEL_1;
info.blFlag = HI_TRUE;
info.u32Mode = HI_STREAM_MODE_TCP;
info.u8Type = HI_STREAM_ALL; /* 成功返回 #define HI_SUCCESS 0 ，失败返回错误代码。*/
m_lPlay = HI_SDK_RealPlay(m_lLoginHandle, (HI_VOID*)m_Win, &info); emit sglOnMessage(m_lPlay != ? E_REALPLAY_FAILURE : E_REALPLAY_SUCCESS, "play err");
emit sglOnMessage(E_DEBUG_LOG, m_lPlay == ? "play err" : "play success"); //登录并播放成功后发送句柄
emit sglSendHandle(m_lLoginHandle, m_lPlay);
}

2.调用这个线程类：

LZYVideo.h头文件

#pragma once#include <BaseVideo.h>
#include "PlayVideoThread.h"
#include "hi_sdk_api.h"
#include <QThread>class LZYVideo : public BaseVideo
{
Q_OBJECTpublic:
LZYVideo(QObject *parent=);
~LZYVideo();
int startRealPlay(VIDEO_CHANNEL ch, int win) ;
int stopRealPlay() ;private:
HI_HANDLE m_lLoginHandle;
HI_S32 m_lPlay; VIDEO_CHANNEL m_VideoChannel; PlayVideoThread* m_pPlayWorker;
QThread* m_pPlayWorkerThread;private:
void createThreadForPlayVideo(VIDEO_CHANNEL ch, int win);
void destroyThreadForPlayVideo();private slots:
void sltGetHandle(HI_HANDLE loginHandle, HI_S32 play);
};

LZYVideo.cpp源文件

#include "LZYVideo.h"void LZYVideo::createThreadForPlayVideo(VIDEO_CHANNEL ch, int win) //创建线程
{
destroyThreadForPlayVideo();
m_pPlayWorker = new PlayVideoThread;
m_pPlayWorker->setParam(ch, win);
m_pPlayWorkerThread = new QThread(this);
m_pPlayWorker->moveToThread(m_pPlayWorkerThread);
connect(m_pPlayWorkerThread, SIGNAL(finished()), m_pPlayWorkerThread, SLOT(deleteLater()));
connect(m_pPlayWorkerThread, SIGNAL(finished()), m_pPlayWorker, SLOT(deleteLater()));
connect(m_pPlayWorkerThread, SIGNAL(started()), m_pPlayWorker, SLOT(doWork())); connect(m_pPlayWorker, SIGNAL(sglOnMessage(VIDEO_STATUS_EVENT, QString)), this, SIGNAL(sglOnMessage(VIDEO_STATUS_EVENT, QString)));
connect(m_pPlayWorker, SIGNAL(sglSendHandle(HI_HANDLE, HI_S32)), this, SLOT(sltGetHandle(HI_HANDLE, HI_S32))); m_pPlayWorkerThread->start();
}void LZYVideo::destroyThreadForPlayVideo()
{
if (m_pPlayWorkerThread && m_pPlayWorkerThread->isRunning())
{
m_pPlayWorkerThread->exit();
m_pPlayWorkerThread->wait();
m_pPlayWorkerThread->deleteLater();
m_pPlayWorkerThread = NULL;
}
}int LZYVideo::startRealPlay(VIDEO_CHANNEL ch, int win)
{
m_VideoChannel = ch; stopRealPlay(); createThreadForPlayVideo(ch, win); //创建一个线程播放视频 return ;
}void LZYVideo::sltGetHandle(HI_HANDLE loginHandle, HI_S32 play)
{
m_lLoginHandle = loginHandle;
m_lPlay = play; destroyThreadForPlayVideo();
}