C# 视频监控系列（12）：H264播放器——播放录像文件

正文

     先来一张简单的效果图

     

     以下几个VC++ 代码片段:

          CPlayerDlg::OnInitDialog()

    Hik_PlayM4_SetVolume(PORT,m_SoundSlider.GetPos());

    // 其他代码

    //set the capture picture call back function;
    Hik_PlayM4_SetDisplayCallBack(PORT,DisplayCBFun);
    //set the wave audio call back funtion;
    Hik_PlayM4_SetAudioCallBack(PORT,WaveCBFun, (long)this);

    // 其他代码

    Hik_PlayM4_SetEncTypeChangeCallBack(PORT,funEncChange,(long)this);
#if (WINVER > 0x0400)
    //If do not support multi monitor,may not call!
    Hik_PlayM4_InitDDrawDevice();
    Hik_PlayM4_SetDDrawDevice(PORT,0);
#endif
    //Test adapter Capability;
    TestCapability(0);
    Hik_PlayM4_SetFileEndMsg(PORT,m_hWnd,WM_FILE_END);
    Hik_PlayM4_SetEncChangeMsg(PORT,m_hWnd,WM_ENC_CHANGE);
    if(m_strPlayFileName.Compare(""))
    {
        if(m_bStreamType)
            OpenStream();
        else
            OpenFile();
    }
  

          CPlayerDlg::OpenFile()

    Hik_PlayM4_SetFileRefCallBack(PORT,FileRefDone,(DWORD)this);
    Hik_PlayM4_SetVerifyCallBack(PORT, 0, 0xffffffff, VerifyFun, (DWORD) this);// verify the whole file;
    if(!Hik_PlayM4_OpenFile(PORT,m_strPlayFileName.GetBuffer(m_strPlayFileName.GetLength())))
    {
        m_strPlayFileName="";
        CString csError;
        csError.Format("Open file failed(%d)",Hik_PlayM4_GetLastError(PORT));
        MessageBox(csError);
        return ;
    }
    SetOpenState();
    m_nMaxFileTime=Hik_PlayM4_GetFileTime(PORT);
    if(!m_nMaxFileTime)
    {
        MessageBox("File seconds is zero");
        return;
    }
    m_nTotalHour=m_nMaxFileTime/3600;
    m_nTotalMinute=(m_nMaxFileTime%3600)/60;
    m_nTotalSecond=m_nMaxFileTime%60;
    m_nTotalFrames=Hik_PlayM4_GetFileTotalFrames(PORT);
    numFrames=m_nTotalFrames;
    //If you want to change the display buffer. Do hear!
    //Hik_PlayM4_SetDisplayBuf(PORT,25);
    Play();

          CPlayerDlg::Play()

    OnThrow0();
//#ifdef _TEST_CALLBACK
    if(m_bConvert)       
       Hik_PlayM4_SetDecCallBack(PORT,DecCBFun);
    else
        m_pMainMenu->EnableMenuItem(ID_FILE_CLOSE, FALSE);
//#endif
    if(m_bPlaying)
    {
        Hik_PlayM4_Play(PORT,GetDlgItem(IDC_SHOW)->m_hWnd);
    }
    else
    {
        if(m_bStreamType)
        {
            ::SetFilePointer(m_hStreamFile,m_nHeadSize,0,FILE_BEGIN);
            Hik_PlayM4_ResetSourceBuffer(PORT);
            SetEvent(m_hEventInput);
        }
        m_bPlaying = Hik_PlayM4_Play(PORT,GetDlgItem(IDC_SHOW)->m_hWnd);
        m_bSound=Hik_PlayM4_PlaySound(PORT);
        if(m_bPlaying)
            SetTimer(PLAY_TIMER,500,NULL);
        
    }

          CPlayerDlg::SetOpenState()

    Hik_PlayM4_GetPictureSize(PORT,&m_nWidth,&m_nHeight);

    Hik_PlayM4_SetOverlayMode(PORT,TRUE,RGB(255,0,255));

          代码分析：

               1.     从OnInitDialog部分代码可以看出主要是设置声音、判断是不是双击视频文件或者直接从流中读取数据。

               2.     OpenFile和SetOpenState是打开文件、设置画面大小、显示统计信息，如总帧数、视频总时间。

               3.     Play播放打开的视频文件。

               4.     注意这里不讨论直接从流中读取数据并播放。

     

     以下是非完全对应的C# Code:

        //uesed port;can be from 0 to 15;
        int PORT = 0;
        //视频文件路径
        private string m_strPlayFileName;

        private void Form3_Load(object sender, EventArgs e)
        {
            //设置音量
            HikPlayer.Hik_PlayM4_SetVolume(PORT, 0xFFFF);

            HikPlayer.Hik_PlayM4_SetFileEndMsg(PORT, pVideo.Handle, HikPlayer.WM_FILE_END);

            HikPlayer.Hik_PlayM4_SetEncChangeMsg(PORT, pVideo.Handle, HikPlayer.WM_ENC_CHANGE);
        }

        /// <summary>
        /// 打开文件并播放
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnPlay_Click(object sender, EventArgs e)
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                m_strPlayFileName = openFileDialog1.FileName;
                if (!string.IsNullOrEmpty(m_strPlayFileName))
                {
                    OpenFile();
                    //设置画面质量
                    HikPlayer.Hik_PlayM4_SetPicQuality(PORT, true);
                }
                else
                    MessageBox.Show("请选择文件！！");
            }
        }

        private void OpenFile()
        {
            //打开播放文件
            HikPlayer.Hik_PlayM4_OpenFile(PORT, m_strPlayFileName);

            Play();
        }

        public void SetOpenState()
        {
            //m_bOpen=TRUE;
            int m_nWidth, m_nHeight;
            //获取原始图像的大小，可根据这个自动设置播放器大小
            HikPlayer.Hik_PlayM4_GetPictureSize(PORT, out m_nWidth, out m_nHeight);
            HikPlayer.Hik_PlayM4_SetOverlayMode(PORT, true, Color.FromArgb(255, 0, 255).ToArgb());
        }

        private void Play()
        {
            //开始播放
            HikPlayer.Hik_PlayM4_Play(PORT, pVideo.Handle);//this.Handle);  
            //播放声音
            HikPlayer.Hik_PlayM4_PlaySound(PORT);
        }

          代码说明:

               1.     相对于VC++例子，这里省略了许多代码，比如空委托、显示统计信息等。

               2.     如果文件打开出错，有可能是前面视频录像文件有问题，你可以先用自带的播放器试一下。

               3.     建议补充错误处理。

 

结束

     加油~~~快接近尾声了 : )