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<span class="hljs-attribute">udevadm</span> <span class="hljs-literal">info</span> /dev/nvme0n1 |
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Cam.vb 代码
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Imports System Imports System.Runtime.InteropServices Imports System.Drawing Imports System.Drawing.Imaging Public Class Cam Private Const WM_USER As Integer = &H400 Private Const WS_CHILD As Integer = &H40000000 Private Const WS_VISIBLE As Integer = &H10000000 Private Const WM_CAP_START As Integer = WM_USER Private Const WM_CAP_STOP As Integer = WM_CAP_START + 68 Private Const WM_CAP_DRIVER_CONNECT As Integer = WM_CAP_START + 10 Private Const WM_CAP_DRIVER_DISCONNECT As Integer = WM_CAP_START + 11 Private Const WM_CAP_SAVEDIB As Integer = WM_CAP_START + 25 Private Const WM_CAP_GRAB_FRAME As Integer = WM_CAP_START + 60 Private Const WM_CAP_SEQUENCE As Integer = WM_CAP_START + 62 Private Const WM_CAP_FILE_SET_CAPTURE_FILEA As Integer = WM_CAP_START + 20 Private Const WM_CAP_SEQUENCE_NOFILE As Integer = WM_CAP_START + 63 Private Const WM_CAP_SET_OVERLAY As Integer = WM_CAP_START + 51 Private Const WM_CAP_SET_PREVIEW As Integer = WM_CAP_START + 50 Private Const WM_CAP_SET_CALLBACK_VIDEOSTREAM As Integer = WM_CAP_START + 6 Private Const WM_CAP_SET_CALLBACK_ERROR As Integer = WM_CAP_START + 2 Private Const WM_CAP_SET_CALLBACK_STATUSA As Integer = WM_CAP_START + 3 Private Const WM_CAP_SET_CALLBACK_FRAME As Integer = WM_CAP_START + 5 Private Const WM_CAP_SET_SCALE As Integer = WM_CAP_START + 53 Private Const WM_CAP_SET_PREVIEWRATE As Integer = WM_CAP_START + 52 Public Const WM_CAP_GET_CAPSTREAMPTR = WM_CAP_START + 1 Public Const WM_CAP_SET_CALLBACK_STATUS = WM_CAP_START + 3 Public Const WM_CAP_SET_CALLBACK_YIELD = WM_CAP_START + 4 Public Const WM_CAP_SET_CALLBACK_WAVESTREAM = WM_CAP_START + 7 Public Const WM_CAP_GET_USER_DATA = WM_CAP_START + 8 Public Const WM_CAP_SET_USER_DATA = WM_CAP_START + 9 Public Const WM_CAP_DRIVER_GET_NAME = WM_CAP_START + 12 Public Const WM_CAP_DRIVER_GET_VERSION = WM_CAP_START + 13 Public Const WM_CAP_DRIVER_GET_CAPS = WM_CAP_START + 14 Public Const WM_CAP_FILE_SET_CAPTURE_FILE = WM_CAP_START + 20 Public Const WM_CAP_FILE_GET_CAPTURE_FILE = WM_CAP_START + 21 Public Const WM_CAP_FILE_ALLOCATE = WM_CAP_START + 22 Public Const WM_CAP_FILE_SAVEAS = WM_CAP_START + 23 Public Const WM_CAP_FILE_SET_INFOCHUNK = WM_CAP_START + 24 Public Const WM_CAP_FILE_SAVEDIB = WM_CAP_START + 25 Public Const WM_CAP_EDIT_COPY = WM_CAP_START + 30 Public Const WM_CAP_SET_AUDIOFORMAT = WM_CAP_START + 35 Public Const WM_CAP_GET_AUDIOFORMAT = WM_CAP_START + 36 Public Const WM_CAP_DLG_VIDEOFORMAT = WM_CAP_START + 41 Public Const WM_CAP_DLG_VIDEOSOURCE = WM_CAP_START + 42 Public Const WM_CAP_DLG_VIDEODISPLAY = WM_CAP_START + 43 Public Const WM_CAP_GET_VIDEOFORMAT = WM_CAP_START + 44 Public Const WM_CAP_SET_VIDEOFORMAT = WM_CAP_START + 45 Public Const WM_CAP_DLG_VIDEOCOMPRESSION = WM_CAP_START + 46 Public Const WM_CAP_GET_STATUS = WM_CAP_START + 54 Public Const WM_CAP_SET_SCROLL = WM_CAP_START + 55 Public Const WM_CAP_GRAB_FRAME_NOSTOP = WM_CAP_START + 61 Public Const WM_CAP_SET_SEQUENCE_SETUP = WM_CAP_START + 64 Public Const WM_CAP_GET_SEQUENCE_SETUP = WM_CAP_START + 65 Public Const WM_CAP_SET_MCI_DEVICE = WM_CAP_START + 66 Public Const WM_CAP_GET_MCI_DEVICE = WM_CAP_START + 67 Public Const WM_CAP_ABORT = WM_CAP_START + 69 Public Const WM_CAP_SINGLE_FRAME_OPEN = WM_CAP_START + 70 Public Const WM_CAP_SINGLE_FRAME_CLOSE = WM_CAP_START + 71 Public Const WM_CAP_SINGLE_FRAME = WM_CAP_START + 72 Public Const WM_CAP_PAL_OPEN = WM_CAP_START + 80 Public Const WM_CAP_PAL_SAVE = WM_CAP_START + 81 Public Const WM_CAP_PAL_PASTE = WM_CAP_START + 82 Public Const WM_CAP_PAL_AUTOCREATE = WM_CAP_START + 83 Public Const WM_CAP_PAL_MANUALCREATE = WM_CAP_START + 84 '// Following added post VFW 1.1 Public Const WM_CAP_SET_CALLBACK_CAPCONTROL = WM_CAP_START + 85 '// Defines end of the message range Public Const WM_CAP_END = WM_CAP_SET_CALLBACK_CAPCONTROL Private hWndC As IntPtr Private bStat As Boolean = False Private mControlPtr As IntPtr Private mWidth As Integer Private mHeight As Integer Private mLeft As Integer Private mTop As Integer <DllImport("avicap32.dll")> _ Private Shared Function capCreateCaptureWindowA(ByVal lpszWindowName() As Byte, ByVal dwStyle As Integer, ByVal x As Integer, ByVal y As Integer, ByVal nWidth As Integer, ByVal nHeight As Integer, ByVal hWndParent As IntPtr, ByVal nID As Integer) As IntPtr End Function <DllImport("avicap32.dll")> _ Private Shared Function capGetVideoFormat(ByVal hWnd As IntPtr, ByVal psVideoFormat As IntPtr, ByVal wSize As Integer) As Integer End Function <DllImport("User32.dll")> _ Private Shared Function SendMessage(ByVal hWnd As IntPtr, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Boolean End Function Function capDlgVideoFormat() As Boolean capDlgVideoFormat = SendMessage(hWndC, WM_CAP_DLG_VIDEOFORMAT, 0, 0) End Function Function capDlgVideoSource() As Boolean capDlgVideoSource = SendMessage(hWndC, WM_CAP_DLG_VIDEOSOURCE, 0, 0) End Function Function capDlgVideoDisplay() As Boolean capDlgVideoDisplay = SendMessage(hWndC, WM_CAP_DLG_VIDEODISPLAY, 0, 0) End Function Function capDlgVideoCompression() As Boolean capDlgVideoCompression = SendMessage(hWndC, WM_CAP_DLG_VIDEOCOMPRESSION, 0, 0) End Function '接上节 '/// '/// 初始化摄像头 '/// '///控件的句柄 '///开始显示的左边距 '///开始显示的上边距 '///要显示的宽度 '///要显示的长度 Public Sub New(ByVal handle As IntPtr, ByVal left As Integer, ByVal top As Integer, ByVal width As Integer, ByVal height As Integer) mControlPtr = handle mWidth = width mHeight = height mLeft = left mTop = top End Sub '/// '/// 开始显示图像 '/// Public Sub Start() If bStat Then Return End If bStat = True Dim lpszName(99) As Byte hWndC = capCreateCaptureWindowA(lpszName, WS_CHILD Or WS_VISIBLE, mLeft, mTop, mWidth, mHeight, mControlPtr, 0) If hWndC.ToInt32() <> 0 Then SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0) SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, 0, 0) SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, 0, 0) SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, 0, 0) SendMessage(hWndC, WM_CAP_SET_SCALE, 1, 0) SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, 0) SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0) SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0) End If Return End Sub '/// '/// 停止显示 '/// Public Sub [Stop]() SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0) bStat = False End Sub '/// '/// 抓图 '/// '///要保存bmp文件的路径 Public Sub GrabImage(ByVal path As String) Dim hBmp As IntPtr = Marshal.StringToHGlobalAnsi(path) SendMessage(hWndC, WM_CAP_SAVEDIB, 0, hBmp.ToInt64()) End Sub '/// '/// 录像 '/// '///要保存avi文件的路径 Public Sub Kinescope(ByVal path As String) Dim hBmp As IntPtr = Marshal.StringToHGlobalAnsi(path) SendMessage(hWndC, WM_CAP_FILE_SET_CAPTURE_FILEA, 0, hBmp.ToInt64()) SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0) End Sub '/// '/// 停止录像 '/// Public Sub StopKinescope() SendMessage(hWndC, WM_CAP_STOP, 0, 0) End Sub End Class |
窗体 Form1.vb
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Public Class Form1 Inherits System.Windows.Forms.Form Private cccap As Cam #Region " Windows 窗体设计器生成的代码 " Public Sub New() MyBase.New() '该调用是 Windows 窗体设计器所必需的。 InitializeComponent() '在 InitializeComponent() 调用之后添加任何初始化 End Sub '窗体重写 dispose 以清理组件列表。 Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean) If disposing Then If Not (components Is Nothing) Then components.Dispose() End If End If MyBase.Dispose(disposing) End Sub 'Windows 窗体设计器所必需的 Private components As System.ComponentModel.IContainer '注意: 以下过程是 Windows 窗体设计器所必需的 '可以使用 Windows 窗体设计器修改此过程。 '不要使用代码编辑器修改它。 Friend WithEvents Button1 As System.Windows.Forms.Button Friend WithEvents picView As System.Windows.Forms.PictureBox Friend WithEvents Button2 As System.Windows.Forms.Button Friend WithEvents Button3 As System.Windows.Forms.Button Friend WithEvents Button4 As System.Windows.Forms.Button Friend WithEvents Button5 As System.Windows.Forms.Button <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent() Me.picView = New System.Windows.Forms.PictureBox Me.Button1 = New System.Windows.Forms.Button Me.Button2 = New System.Windows.Forms.Button Me.Button3 = New System.Windows.Forms.Button Me.Button4 = New System.Windows.Forms.Button Me.Button5 = New System.Windows.Forms.Button Me.SuspendLayout() ' 'picView ' Me.picView.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _ Or System.Windows.Forms.AnchorStyles.Left) _ Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles) Me.picView.Location = New System.Drawing.Point(16, 16) Me.picView.Name = "picView" Me.picView.Size = New System.Drawing.Size(640, 480) Me.picView.TabIndex = 0 Me.picView.TabStop = False ' 'Button1 ' Me.Button1.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles) Me.Button1.Location = New System.Drawing.Point(244, 540) Me.Button1.Name = "Button1" Me.Button1.Size = New System.Drawing.Size(56, 24) Me.Button1.TabIndex = 1 Me.Button1.Text = "start" ' 'Button2 ' Me.Button2.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles) Me.Button2.Location = New System.Drawing.Point(304, 540) Me.Button2.Name = "Button2" Me.Button2.Size = New System.Drawing.Size(56, 24) Me.Button2.TabIndex = 1 Me.Button2.Text = "stop" ' 'Button3 ' Me.Button3.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles) Me.Button3.Location = New System.Drawing.Point(380, 540) Me.Button3.Name = "Button3" Me.Button3.Size = New System.Drawing.Size(56, 24) Me.Button3.TabIndex = 1 Me.Button3.Text = "cap" ' 'Button4 ' Me.Button4.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles) Me.Button4.Location = New System.Drawing.Point(352, 508) Me.Button4.Name = "Button4" Me.Button4.Size = New System.Drawing.Size(124, 24) Me.Button4.TabIndex = 1 Me.Button4.Text = "色彩校正" ' 'Button5 ' Me.Button5.Anchor = CType((System.Windows.Forms.AnchorStyles.Bottom Or System.Windows.Forms.AnchorStyles.Left), System.Windows.Forms.AnchorStyles) Me.Button5.Location = New System.Drawing.Point(164, 512) Me.Button5.Name = "Button5" Me.Button5.Size = New System.Drawing.Size(124, 24) Me.Button5.TabIndex = 1 Me.Button5.Text = "画面大小" ' 'Form1 ' Me.AutoScaleBaseSize = New System.Drawing.Size(6, 14) Me.ClientSize = New System.Drawing.Size(792, 573) Me.Controls.Add(Me.Button1) Me.Controls.Add(Me.picView) Me.Controls.Add(Me.Button2) Me.Controls.Add(Me.Button3) Me.Controls.Add(Me.Button4) Me.Controls.Add(Me.Button5) Me.Name = "Form1" Me.Text = "Form1" Me.ResumeLayout(False) End Sub #End Region Private cccap As Cam Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load cccap = New Cam(picView.Handle, 0, 0, picView.Width, picView.Height) cccap.Start() cccap.capDlgVideoFormat() End Sub Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click cccap.GrabImage("c:\test.jpg") cccap.Stop() End Sub Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click cccap.Stop() End Sub Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click cccap.capDlgVideoFormat() End Sub End Class |
注意要点：视频格式应该要设置为“YUY2”，不然可能会显示不出来。
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