C# 视频监控系列（12）：H264播放器—

正文

先来一张简单的效果图

以下几个VC++ 代码片段:

CPlayerDlg::OnInitDialog() CPlayerDlg::OpenFile() CPlayerDlg::Play() CPlayerDlg::SetOpenState()

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,

);

#endif

Test adapter Capability;

TestCapability(

);

Hik_PlayM4_SetFileEndMsg(PORT,m_hWnd,WM_FILE_END);

Hik_PlayM4_SetEncChangeMsg(PORT,m_hWnd,WM_ENC_CHANGE);

(m_strPlayFileName.Compare(

))

{

(m_bStreamType)

OpenStream();

else

OpenFile();

}

Hik_PlayM4_SetFileRefCallBack(PORT,FileRefDone,(DWORD)

this

);

Hik_PlayM4_SetVerifyCallBack(PORT,

0xffffffff

, VerifyFun, (DWORD)

this

);

verify the whole file;

(

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);

(

m_nMaxFileTime)

{

MessageBox(

File seconds is zero

);

return

;

}

m_nTotalHour

m_nMaxFileTime

3600

;

m_nTotalMinute

(m_nMaxFileTime

3600

)

;

m_nTotalSecond

m_nMaxFileTime

;

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();

OnThrow0();

#ifdef _TEST_CALLBACK

(m_bConvert)

Hik_PlayM4_SetDecCallBack(PORT,DecCBFun);

else

m_pMainMenu

EnableMenuItem(ID_FILE_CLOSE, FALSE);

#endif

(m_bPlaying)

{

Hik_PlayM4_Play(PORT,GetDlgItem(IDC_SHOW)

m_hWnd);

}

else

{

(m_bStreamType)

{

::SetFilePointer(m_hStreamFile,m_nHeadSize,

,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);

(m_bPlaying)

SetTimer(PLAY_TIMER,

500

,NULL);

}

Hik_PlayM4_GetPictureSize(PORT,

m_nWidth,

m_nHeight);

Hik_PlayM4_SetOverlayMode(PORT,TRUE,RGB(

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

;

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);

}

///

///

打开文件并播放

///

</summary>

///

///

private

void

btnPlay_Click(

object

sender, EventArgs e)

{

(openFileDialog1.ShowDialog()

DialogResult.OK)

{

m_strPlayFileName

openFileDialog1.FileName;

(

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

).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。

本文转自over140 51CTO博客，原文链接：http://blog.51cto.com/over140/586633，如需转载请自行联系原作者