编程

gSoap身份认证

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按照onvif协议要求，要想将用户名密码发送给球机，把gSoap源码中的如下源文件加入到工程中：
duration.c
duration.h
mecevp.c
mecevp.h
smdevp.c
smdevp.h
threads.c
threads.h
wsaapi.c
wsaapi.h
wsseapi.c
wsseapi.h
在客户端代码中，加入：

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#include "wsaapi.h"
#include "wsseapi.h"
...
struct soap soapCtx;
...
soap_wsse_add_UsernameTokenDigest(&soapCtx, NULL, userName, passwd);

C#文件复制到剪切板

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void CopyToClipboard(string[] files, bool cut)
{
	if (files == null) return;
 
	IDataObject data = new DataObject(DataFormats.FileDrop, files);
	MemoryStream memo = new MemoryStream(4);
	byte[] bytes = new byte[] { (byte)(cut ? 2 : 5), 0, 0, 0 };
	memo.Write(bytes, 0, bytes.Length);
	data.SetData("Preferred DropEffect", memo);
	Clipboard.SetDataObject(data);
}

参考自：https://www.codeproject.com/kb/shell/explorer_drag_drop.aspx

C#鼠标拖动图片控件中的图片

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private Image capturedImage = null;
private Point capturedImageLocation;
private Point capturedImageCursorLocation;
private bool capturedImageIsMouseDown = false;
private bool capturedImageIsFullDisplayed = false;
private void dataGridViewRecord_CellClick(object sender, DataGridViewCellEventArgs e)
{
	string str = dataGridViewRecord.Rows[e.RowIndex].Cells["pic1"].Value.ToString();
	capturedImage = System.Drawing.Image.FromFile(str);
	capturedImageLocation = new Point(0, 0);
	pictureBoxCaptured.Invalidate();
}
 
 
private void pictureBoxCaptured_DoubleClick(object sender, EventArgs e)
{
	if (capturedImageIsFullDisplayed)
		capturedImageIsFullDisplayed = false;
	else
		capturedImageIsFullDisplayed = true;
	pictureBoxCaptured.Invalidate();
}
private void pictureBoxCaptured_MouseDown(object sender, MouseEventArgs e)
{
	if (capturedImageIsFullDisplayed)
		return;
 
	capturedImageIsMouseDown = true;
	capturedImageCursorLocation = new Point(e.X - capturedImageLocation.X, e.Y - capturedImageLocation.Y);
}
private void pictureBoxCaptured_MouseUp(object sender, MouseEventArgs e)
{
	capturedImageIsMouseDown = false;
}
private void pictureBoxCaptured_MouseMove(object sender, MouseEventArgs e)
{
	if (capturedImageIsFullDisplayed)
		return;
	if (!capturedImageIsMouseDown)
		return;
	capturedImageLocation = new Point(e.X - capturedImageCursorLocation.X, e.Y - capturedImageCursorLocation.Y);
	pictureBoxCaptured.Invalidate();
}
private void pictureBoxCaptured_Paint(object sender, PaintEventArgs e)
{
	if (null == capturedImage)
		return;
 
	if (capturedImageIsFullDisplayed)
	{
		e.Graphics.DrawImage(capturedImage, pictureBoxCaptured.ClientRectangle, //e.ClipRectangle,
			new Rectangle(0, 0, capturedImage.Width, capturedImage.Height), GraphicsUnit.Pixel);
	}
	else
	{
		e.Graphics.DrawImage(capturedImage, pictureBoxCaptured.ClientRectangle,
			new Rectangle(-capturedImageLocation.X, -capturedImageLocation.Y, pictureBoxCaptured.Width, pictureBoxCaptured.Height), GraphicsUnit.Pixel);
	}
}

C#子线程让主窗体执行代码

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public delegate void OutDelegate(ParseXmlResult xmlResult);
public void insertDataGridView(ParseXmlResult xmlResult)
{
	if (dataGridViewRecord.InvokeRequired)
	{
		OutDelegate outdelegate = new OutDelegate(insertDataGridView);
		this.BeginInvoke(outdelegate, new object[] { xmlResult });
		return;
	}
 
	DateTime date;
	string[] format = { "yyyyMMddHHmmss" };
	DateTime.TryParseExact(xmlResult.time.Substring(0, 14),
		format,
		System.Globalization.CultureInfo.InvariantCulture,
		System.Globalization.DateTimeStyles.None,
		out date);
 
	dataGridViewRecord.Rows.Add(new object[] { dataGridViewRecord.Rows.Count + 1, date.ToString("yyyy-MM-dd HH:mm:ss"), xmlResult.plate, xmlResult.files[0] });
}
private Thread workThread;
private void ProcessWork()
{
	insertDataGridView(xmlResult);
}
private static void ProcessThread(object param)
{
	MainForm pThis = param as MainForm;
	pThis.ProcessWork();
}
private void btnSearch_Click(object sender, EventArgs e)
{
	workThread = new Thread(new ParameterizedThreadStart(ProcessThread));
	workThread.Start(this);
}

yuv IplImage

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IplImage *Yuv2IplImage(char *yuv, int imgWidth, int imgHeight)
{
	cv::Mat matYUV(imgHeight * 3 / 2, imgWidth, CV_8UC1, yuv);
	cv::Mat matBGR;
	cv::cvtColor(matYUV, matBGR, cv::COLOR_YUV2BGR_NV12);
 
	IplImage imgTmp = matBGR;
	IplImage *img = cvCloneImage(&imgTmp);
	return img;
}

火狐控件弹出菜单后没反应

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如果能改控件程序，比如用FireBreath做的控件，就要使onWindowEvent函数中的WM_PAINT和WM_ERASEBKGND重载返回false。

如果不能改控件程序，试试卸载firefox，再删除文件夹C:\Users\用户名\AppData\Roaming\Mozilla\Firefox，最后重装firefox。同时记住关掉firefox的自动更新。

但有可能重装了也不行，任务管理器中还是两个firefox.exe进程。

所以能改控件程序最完美。

将h264流存为avi文件

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使用ffmpeg存为avi和存为mp4在代码上是一样的，ffmpeg可以通过文件名后缀决定视频文件类型，以下是关键代码：

AviWriter.h

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#pragma once
 
class AVFormatContext;
class AVStream;
 
class AviWriter
{
public:
	int createFile(const char* filename);
	int setVideoTrack(const char* sps, int spslen, const char* pps, int ppslen, int width, int hight, int rate);
	int writeVideoSample(char* data, int datasize, bool keyframe);
	void closeFile();
 
private:
	AVFormatContext *m_fc;
	AVStream *m_avStream;
	int m_isHeaderWritten;
};

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