前言
本章主要實現播放海康錄像文件，更多播放器說明可以參考《Hikvision H264播放器編程指南V4.8》。
先來一張簡單的效果圖
以下幾個VC++ 代碼 片段:
CPlayerDlg::OnInitDialog()
Hik_PlayM4_SetVolume(PORT,m_SoundSlider.GetPos());
//
其他代碼
//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);
// 其他代碼
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));
代碼分析：
1.從OnInitDialog部分代碼可以看出主 要是設置聲音、判斷是不是雙擊視頻文件或者直接從流中讀取數據。
2.OpenFile和SetOpenState是打開文件、設置畫面大小、顯示統計 信息，如總幀數、視頻總時間。
3.Play播放打開的視頻文件。
4.注意這裡不討論直接從流中讀取數據並播放。
以下是非完全對應的C# Code:
//uesed port;can be from 0 to 15;
int PORT = 0;
//視頻文件路徑
private string m_strPlayFileName;
private void Form3_Load(object sender, EventArgs e)
{
//設置音量
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>
/// 打開文件並播放
/// </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();
//設置畫面質量
HikPlayer.Hik_PlayM4_SetPicQuality(PORT, true);
}
else
MessageBox.Show("請選擇文件！！");
}
}
private void OpenFile()
{
//打開播放文件
HikPlayer.Hik_PlayM4_OpenFile(PORT, m_strPlayFileName);
Play();
}
public void SetOpenState()
{
//m_bOpen=TRUE;
int m_nWidth, m_nHeight;
//獲取原始圖像的大小，可根據這個自動設置播放器大小
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()
{
//開始播放
HikPlayer.Hik_PlayM4_Play(PORT, pVideo.Handle);//this.Handle);
//播放聲音
HikPlayer.Hik_PlayM4_PlaySound(PORT);
}
代碼說明:
1.相對於VC++例子，這裡省略了許多代碼，比如空委托、顯示統計信息等。
2.如 果文件打開出錯，有可能是前面視頻錄像文件有問題，你可以先用自帶的播放器試一下。
3.建議補充錯誤處理。
