mainform.cs

usb接口下的视频图像捕捉或录像

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;
using System.IO;
using System.Diagnostics;
using System.Drawing.Imaging;
using DShowNET;
using DShowNET.Device;

namespace CaptureNET
{
/// <summary> Summary description for MainForm. </summary>
    public class MainForm : System.Windows.Forms.Form, ISampleGrabberCB
{
	private System.ComponentModel.IContainer components;
	private System.Windows.Forms.ToolBar toolBar;
	private System.Windows.Forms.Panel videoPanel;
	private System.Windows.Forms.ImageList tbarImageList;
    private ToolBar toolBar1;
    private ToolBarButton toolBarBtnTune;
    private ToolBarButton toolBarBtnGrab;
    private ToolBarButton toolBarBtnSep;
    private ToolBarButton toolBarBtnSave;
        private Panel stillPanel;
        private PictureBox pictureBox;
        private Splitter splitter1;
	private System.Windows.Forms.ToolBarButton tbtnStop;

	public MainForm()
	{
		// Required for Windows Form Designer support
		InitializeComponent();
	}

	/// <summary> Clean up any resources being used. </summary>
	protected override void Dispose( bool disposing )
	{
		if( disposing )
		{
			if (components != null) 
			{
				components.Dispose();
			}
		}
		base.Dispose( disposing );
	}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
            this.components = new System.ComponentModel.Container();
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(MainForm));
            this.toolBar = new System.Windows.Forms.ToolBar();
            this.tbtnStop = new System.Windows.Forms.ToolBarButton();
            this.tbarImageList = new System.Windows.Forms.ImageList(this.components);
            this.videoPanel = new System.Windows.Forms.Panel();
            this.stillPanel = new System.Windows.Forms.Panel();
            this.toolBar1 = new System.Windows.Forms.ToolBar();
            this.toolBarBtnTune = new System.Windows.Forms.ToolBarButton();
            this.toolBarBtnGrab = new System.Windows.Forms.ToolBarButton();
            this.toolBarBtnSep = new System.Windows.Forms.ToolBarButton();
            this.toolBarBtnSave = new System.Windows.Forms.ToolBarButton();
            this.pictureBox = new System.Windows.Forms.PictureBox();
            this.splitter1 = new System.Windows.Forms.Splitter();
            this.stillPanel.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox)).BeginInit();
            this.SuspendLayout();
            // 
            // toolBar
            // 
            this.toolBar.Buttons.AddRange(new System.Windows.Forms.ToolBarButton[] {
            this.tbtnStop});
            this.toolBar.DropDownArrows = true;
            this.toolBar.ImageList = this.tbarImageList;
            this.toolBar.Location = new System.Drawing.Point(0, 0);
            this.toolBar.Name = "toolBar";
            this.toolBar.ShowToolTips = true;
            this.toolBar.Size = new System.Drawing.Size(635, 41);
            this.toolBar.TabIndex = 0;
            this.toolBar.ButtonClick += new System.Windows.Forms.ToolBarButtonClickEventHandler(this.toolBar_ButtonClick);
            // 
            // tbtnStop
            // 
            this.tbtnStop.ImageIndex = 0;
            this.tbtnStop.Name = "tbtnStop";
            this.tbtnStop.Text = "Stop";
            // 
            // tbarImageList
            // 
            this.tbarImageList.ImageStream = ((System.Windows.Forms.ImageListStreamer)(resources.GetObject("tbarImageList.ImageStream")));
            this.tbarImageList.TransparentColor = System.Drawing.Color.Transparent;
            this.tbarImageList.Images.SetKeyName(0, "");
            // 
            // videoPanel
            // 
            this.videoPanel.Location = new System.Drawing.Point(0, 82);
            this.videoPanel.Name = "videoPanel";
            this.videoPanel.Size = new System.Drawing.Size(377, 326);
            this.videoPanel.TabIndex = 1;
            this.videoPanel.Paint += new System.Windows.Forms.PaintEventHandler(this.videoPanel_Paint);
            this.videoPanel.Resize += new System.EventHandler(this.videoPanel_Resize);
            // 
            // stillPanel
            // 
            this.stillPanel.AutoScroll = true;
            this.stillPanel.AutoScrollMargin = new System.Drawing.Size(8, 8);
            this.stillPanel.AutoScrollMinSize = new System.Drawing.Size(32, 32);
            this.stillPanel.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
            this.stillPanel.Controls.Add(this.pictureBox);
            this.stillPanel.Location = new System.Drawing.Point(383, 82);
            this.stillPanel.Name = "stillPanel";
            this.stillPanel.Size = new System.Drawing.Size(252, 326);
            this.stillPanel.TabIndex = 4;
            // 
            // toolBar1
            // 
            this.toolBar1.Buttons.AddRange(new System.Windows.Forms.ToolBarButton[] {
            this.toolBarBtnTune,
            this.toolBarBtnGrab,
            this.toolBarBtnSep,
            this.toolBarBtnSave});
            this.toolBar1.Cursor = System.Windows.Forms.Cursors.Hand;
            this.toolBar1.DropDownArrows = true;
            this.toolBar1.Location = new System.Drawing.Point(0, 41);
            this.toolBar1.Name = "toolBar1";
            this.toolBar1.ShowToolTips = true;
            this.toolBar1.Size = new System.Drawing.Size(635, 41);
            this.toolBar1.TabIndex = 2;
            this.toolBar1.ButtonClick += new System.Windows.Forms.ToolBarButtonClickEventHandler(this.toolBar1_ButtonClick);
            // 
            // toolBarBtnTune
            // 
            this.toolBarBtnTune.Enabled = false;
            this.toolBarBtnTune.ImageIndex = 0;
            this.toolBarBtnTune.Name = "toolBarBtnTune";
            this.toolBarBtnTune.Text = "Tune";
            this.toolBarBtnTune.ToolTipText = "TV tuner dialog";
            // 
            // toolBarBtnGrab
            // 
            this.toolBarBtnGrab.ImageIndex = 1;
            this.toolBarBtnGrab.Name = "toolBarBtnGrab";
            this.toolBarBtnGrab.Text = "Grab";
            this.toolBarBtnGrab.ToolTipText = "Grab picture from stream";
            // 
            // toolBarBtnSep
            // 
            this.toolBarBtnSep.Enabled = false;
            this.toolBarBtnSep.Name = "toolBarBtnSep";
            this.toolBarBtnSep.Style = System.Windows.Forms.ToolBarButtonStyle.Separator;
            // 
            // toolBarBtnSave
            // 
            this.toolBarBtnSave.Enabled = false;
            this.toolBarBtnSave.ImageIndex = 2;
            this.toolBarBtnSave.Name = "toolBarBtnSave";
            this.toolBarBtnSave.Text = "Save";
            this.toolBarBtnSave.ToolTipText = "Save image to file";
            // 
            // pictureBox
            // 
            this.pictureBox.Location = new System.Drawing.Point(3, 3);
            this.pictureBox.Name = "pictureBox";
            this.pictureBox.Size = new System.Drawing.Size(233, 232);
            this.pictureBox.TabIndex = 0;
            this.pictureBox.TabStop = false;
            // 
            // splitter1
            // 
            this.splitter1.Location = new System.Drawing.Point(0, 82);
            this.splitter1.Name = "splitter1";
            this.splitter1.Size = new System.Drawing.Size(3, 326);
            this.splitter1.TabIndex = 7;
            this.splitter1.TabStop = false;
            // 
            // MainForm
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.BackColor = System.Drawing.Color.Black;
            this.ClientSize = new System.Drawing.Size(635, 408);
            this.Controls.Add(this.splitter1);
            this.Controls.Add(this.toolBar1);
            this.Controls.Add(this.videoPanel);
            this.Controls.Add(this.stillPanel);
            this.Controls.Add(this.toolBar);
            this.Name = "MainForm";
            this.Text = "Capture .NET";
            this.Activated += new System.EventHandler(this.MainForm_Activated);
            this.Closing += new System.ComponentModel.CancelEventHandler(this.MainForm_Closing);
            this.stillPanel.ResumeLayout(false);
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

		}
		#endregion


	/// <summary>
	/// The main entry point for the application.
	/// </summary>
	[STAThread]
	static void Main() 
	{
		Application.Run(new MainForm());
	}

	private void MainForm_Closing(object sender, System.ComponentModel.CancelEventArgs e)
	{
		this.Hide();
		CloseInterfaces();
	}


		/// <summary> handler for ToolBar button clicks. </summary>
	private void toolBar_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
	{
		if( capGraph == null )
			return;

		if( e.Button == tbtnStop )
		{
			this.Close();
		}

	}


		/// <summary> detect first form appearance, start capturing. </summary>
	private void MainForm_Activated(object sender, System.EventArgs e)
	{
		if( firstActive )
			return;
		firstActive = true;

		if( ! DsUtils.IsCorrectDirectXVersion() )
		{
			MessageBox.Show( this, "DirectX 8.1 NOT installed!", "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop );
			this.Close(); return;
		}

		if( ! DsDev.GetDevicesOfCat( FilterCategory.VideoInputDevice, out capDevices ) )
		{
			MessageBox.Show( this, "No video capture devices found!", "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop );
			this.Close(); return;
		}

		SaveFileDialog sd = new SaveFileDialog();
		sd.FileName = @"CaptureNET.avi";
		sd.Title = "Save Video Stream as...";
		sd.Filter = "Video file (*.avi)|*.avi";
		sd.FilterIndex = 1;
		if( sd.ShowDialog() != DialogResult.OK )
			{ this.Close(); return; }
		fileName = sd.FileName;

		DsDevice dev = null;
		if( capDevices.Count == 1 )
			dev = capDevices[0] as DsDevice;
		else
		{
			DeviceSelector selector = new DeviceSelector( capDevices );
			selector.ShowDialog( this );
			dev = selector.SelectedDevice;
		}

		if( dev == null )
		{
			this.Close(); return;
		}

		if( ! StartupVideo( dev.Mon ) )
			this.Close();
		this.Text = "- capturing -";
	}

		/// <summary> start all the interfaces, graphs and preview window. </summary>
	bool StartupVideo( UCOMIMoniker mon )
	{
		int hr;
		try {
			if( ! CreateCaptureDevice( mon ) )
				return false;

			if( ! GetInterfaces() )
				return false;

			if( ! SetupGraph() )
				return false;

			if( ! SetupVideoWindow() )
				return false;

			#if DEBUG
				DsROT.AddGraphToRot( graphBuilder, out rotCookie );		// graphBuilder capGraph
			#endif
			
			hr = mediaCtrl.Run();
			if( hr < 0 )
				Marshal.ThrowExceptionForHR( hr );

            bool hasTuner = DsUtils.ShowTunerPinDialog(capGraph, capFilter, this.Handle);
            toolBarBtnTune.Enabled = hasTuner;

			return true;
		}
		catch( Exception ee )
		{
			MessageBox.Show( this, "Could not start video stream\r\n" + ee.Message, "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop );
			return false;
		}
	}


		/// <summary> build the capture graph. </summary>
	bool SetupGraph()
	{
		int hr;
		IBaseFilter		mux = null;
		IFileSinkFilter	sink = null;

		try {
			hr = capGraph.SetFiltergraph( graphBuilder );
			if( hr < 0 )
				Marshal.ThrowExceptionForHR( hr );

			hr = graphBuilder.AddFilter( capFilter, "Ds.NET Video Capture Device" );
			if( hr < 0 )
				Marshal.ThrowExceptionForHR( hr );

			DsUtils.ShowCapPinDialog( capGraph, capFilter, this.Handle );

			Guid sub = MediaSubType.Avi;
			hr = capGraph.SetOutputFileName( ref sub, fileName, out mux, out sink );
			if( hr < 0 )
				Marshal.ThrowExceptionForHR( hr );

			Guid cat = PinCategory.Capture;
			Guid med = MediaType.Video;
			hr = capGraph.RenderStream( ref cat, ref med, capFilter, null, mux ); // stream to file 
			if( hr < 0 )
				Marshal.ThrowExceptionForHR( hr );

			cat = PinCategory.Preview;
			med = MediaType.Video;
			hr = capGraph.RenderStream( ref cat, ref med, capFilter, null, null ); // preview window
			if( hr < 0 )
				Marshal.ThrowExceptionForHR( hr );

			return true;
		}
		catch( Exception ee )
		{
			MessageBox.Show( this, "Could not setup graph\r\n" + ee.Message, "DirectShow.NET", MessageBoxButtons.OK, MessageBoxIcon.Stop );
			return false;
		}
		finally
		{
			if( mux != null )
				Marshal.ReleaseComObject( mux ); mux = null;
			if( sink != null )
				Marshal.ReleaseComObject( sink ); sink = null;
		}
	}


		/// <summary> create the used COM components and get the interfaces. </summary>