videoio.h

pwlib源码库

/*
 * videoio.h
 *
 * Classes to support streaming video input (grabbing) and output.
 *
 * Portable Windows Library
 *
 * Copyright (c) 1993-2000 Equivalence Pty. Ltd.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is Portable Windows Library.
 *
 * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
 *
 * Contributor(s): ______________________________________.
 *
 * $Log: videoio.h,v $
 * Revision 1.11  2003/09/17 05:41:59  csoutheren
 * Removed recursive includes
 *
 * Revision 1.10  2002/03/03 00:13:24  yurik
 * Added include for cevfw.h
 *
 * Revision 1.9  2001/05/22 12:49:32  robertj
 * Did some seriously wierd rewrite of platform headers to eliminate the
 *   stupid GNU compiler warning about braces not matching.
 *
 * Revision 1.8  2001/04/09 10:44:36  yurik
 * Removed ifdefs around wince version
 *
 * Revision 1.7  2001/03/03 05:06:31  robertj
 * Major upgrade of video conversion and grabbing classes.
 *
 * Revision 1.6  2001/01/24 06:10:04  yurik
 * Windows CE port-related changes
 *
 * Revision 1.5  2000/12/19 22:20:26  dereks
 * Add video channel classes to connect to the PwLib PVideoInputDevice class.
 * Add PFakeVideoInput class to generate test images for video.
 *
 * Revision 1.4  2000/07/26 02:54:41  robertj
 * Fixed platform dependent code changing public functions to protected.
 *
 * Revision 1.3  2000/07/25 13:38:26  robertj
 * Added frame rate parameter to video frame grabber.
 *
 * Revision 1.2  2000/07/25 13:14:07  robertj
 * Got the video capture stuff going!
 *
 * Revision 1.1  2000/07/15 09:47:35  robertj
 * Added video I/O device classes.
 *
 */

///////////////////////////////////////////////////////////////////////////////
// PVideoDevice

  public:
    virtual BOOL SetColourFormat(const PString & colourFormat);
    virtual BOOL SetFrameRate(unsigned rate);
    virtual BOOL SetFrameSize(unsigned width, unsigned height);

  protected:
    static LRESULT CALLBACK ErrorHandler(HWND hWnd, int id, LPCSTR err);
    LRESULT HandleError(int id, LPCSTR err);
    static LRESULT CALLBACK VideoHandler(HWND hWnd, LPVIDEOHDR vh);
    LRESULT HandleVideo(LPVIDEOHDR vh);
    BOOL InitialiseCapture();
    void HandleCapture();

    PThread     * captureThread;
    PSyncPoint    threadStarted;

    HWND          hCaptureWindow;

    PSyncPoint    frameAvailable;
    LPBYTE        lastFramePtr;
    unsigned      lastFrameSize;
    PMutex        lastFrameMutex;
    BOOL          isCapturingNow;

  friend class PVideoInputThread;

// End Of File ///////////////////////////////////////////////////////////////