videocap.~pas

Tvideocap组件,本人在安装的时候卸载掉imageen才能安装上。

unit Videocap;

interface

 uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls,stdctrls,
  ExtCtrls,vfw,syncobjs;

 ///////////////////////////////////////////////////////////////////////////////
// Video Capturing

//type
// Types for audio-settings
 //TChannel = (Stereo, Mono);
 //TFrequency = (f8000Hz, f11025Hz, f22050Hz, f44100Hz);
 //TResolution  = (r8Bit, r16Bit);


// Types for event-procedures
type
  TCapStatusProc = procedure(Sender: TObject) of object;
  TCapStatusCallback = procedure (Sender:TObject;nID:integer;status:string) of object;
  TVideoStream = procedure (sender:TObject;lpVhdr:PVIDEOHDR) of object;
  //TAudioStream = procedure (sender:TObject;lpWHdr:PWAVEHDR) of object;
  TError       = procedure (sender:TObject;nID:integer; errorstr:string) of object;


// Exceptions
type ENoDriverException      = class(Exception);
type ENoCapWindowException   = class(Exception);
type ENotConnectException    = class(Exception);
type ENoOverlayException     = class(Exception);
type EFalseFormat            = class(Exception);
type ENotOpen                = class(Exception);
type EBufferFileError        = class(Exception);


{type
TAudioFormat = class (TPersistent)
   private
    FChannels :TChannel;
    FFrequency:TFrequency;
    FRes      :TResolution;
  private
    procedure SetAudio(handle:Thandle); // Setting Audio Data to Capture Window

  public
   constructor create;

   published
     property Channels: TChannel read FChannels write Fchannels     default Mono;
     property Frequency: TFrequency read FFrequency write fFrequency default f8000Hz;
     property Resolution : TResolution read FRes write FRes         default r8Bit;
 end;
          }




type
  TVideoCap = class(TCustomControl)
  private

   fdriverIndex:integer;   // Videodriver index
   fVideoDriverName     : string;  // name of videodriver
   fhCapWnd             : THandle;  // handle for CAP-Window
   fpDrivercaps         : PCapDriverCaps; // propertys of videodriver
   fpDriverStatus       : pCapStatus; // status of capdriver
   fscale               : boolean;  // window scaling
   fprop                : boolean;  // proportional scaling
   fpreviewrate         : word;  // Frames p. sec during preview
   fmicrosecpframe      : cardinal; // framerate as microsconds
   fCapVideoFileName    : string; // name of the capture file
   fTempFileName        : String; // Name of temporary avi-file
   fTempFileSize        : word; // size of Tmp- File in MB

   fCapSingleImageFileName : string; // name of the file for a single image
   //fcapAudio               :boolean; // Capture also audio stream
   fcapTimeLimit           :word;    // Time limit for captureing
   fIndexSize             :cardinal; // size of the index in the capture file
   fcapToFile             : boolean;  // Write frames to file druing capturing
   //FAudioFormat           : TAudioFormat;// Audio Format
   fCapStatusProcedure     : TCapStatusProc;      // Event procedure for internal component status
   fcapStatusCallBack      : TCapStatusCallback;  // Event procedure for status of then driver
   fcapVideoStream         : TVideoStream;        // Event procedure for each Video frame during capturing
   //fcapAudioStream         : TAudiostream;        // Event procedure for each Audio buffer
   fcapFrameCallback       : TVideoStream;        // Event procedure for each Video frame during preview
   fcapError               : TError;              // Event procedure for Error




   procedure setsize(var msg:TMessage); message WM_SIZE;  // Changing size of cap window
   function GetDriverCaps:boolean;                        // get driver capitiyties
   procedure DeleteDriverProps;                           // delete driver capitilyites
   procedure CreateTmpFile(drvopn:boolean); // Create or delete a temp avi