vsdl.h

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/*
 * vsdl.h
 *
 * Classes to support video output via SDL
 *
 * Copyright (c) 1999-2000 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 Open H323 Library.
 *
 * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
 *
 * Contributor(s): Derek J Smithies (derek@indranet.co.nz)
 *
 * $Log: vsdl.h,v $
 * Revision 1.11  2006/06/21 04:20:07  csoutheren
 * Fixes for VS.net
 *
 * Revision 1.10  2005/11/30 12:47:37  csoutheren
 * Removed tabs, reformatted some code, and changed tags for Doxygen
 *
 * Revision 1.9  2005/08/09 09:08:08  rjongbloed
 * Merged new video code from branch back to the trunk.
 *
 * Revision 1.8.2.1  2005/07/17 09:26:46  rjongbloed
 * Major revisions of the PWLib video subsystem including:
 *   removal of F suffix on colour formats for vertical flipping, all done with existing bool
 *   working through use of RGB and BGR formats so now consistent
 *   cleaning up the plug in system to use virtuals instead of pointers to functions.
 *   rewrite of SDL to be a plug in compatible video output device.
 *   extensive enhancement of video test program
 *
 * Revision 1.8  2005/07/13 12:50:07  csoutheren
 * Backported changes from isvo branch
 *
 * Revision 1.7.8.1  2005/04/25 13:27:26  shorne
 * Added support for capture SDL output to redirect to existing surface
 *
 * Revision 1.7  2004/05/31 01:26:58  dereksmithies
 * Fix the "no newline at end of file" warning.
 *
 * Revision 1.6  2004/05/27 04:47:05  csoutheren
 * Added include guard to file
 *
 * Revision 1.5  2003/12/12 05:11:56  rogerhardiman
 * Add SDL support on FreeBSD. Header files live in SDL11 directory
 *
 * Revision 1.4  2003/05/17 03:20:48  rjongbloed
 * Removed need to do strange things with main() function.
 *
 * Revision 1.3  2003/04/28 14:29:45  craigs
 * Started rearranging code
 *
 * Revision 1.2  2003/04/28 08:44:42  craigs
 * Fixed problem with include on linux
 *
 * Revision 1.1  2003/04/28 07:04:20  craigs
 * Initial version from ohphone
 *
 * Revision 1.8  2003/03/21 00:47:47  dereks
 * Remove surplus PTRACE statements.
 *
 * Revision 1.7  2003/03/20 23:50:41  dereks
 * Fixups resulting from the new PVideoOutputDevice class code.
 *
 * Revision 1.6  2002/12/03 21:45:05  dereks
 * Fixes from Walter Whitlock to cure warnings about u_chars. Thanks!
 *
 * Revision 1.5  2002/06/27 02:17:40  robertj
 * Renamed video format 411 to the correct 420P, thanks Mark Cooke
 *
 * Revision 1.4  2002/04/29 03:51:55  dereks
 * Documentation tidy up. Thanks to Walter Whitlock.
 *
 * Revision 1.3  2002/04/26 03:33:32  dereks
 * Major upgrade. All calls to SDL library are now done by one thread.
 *
 * Revision 1.2  2001/05/25 01:14:44  dereks
 * Alter SetFrameSize & OpenWindo to use unsigned variables. Change type of
 * other variables to eliminate compiler warnings.
 *
 * Revision 1.1  2001/03/07 01:47:45  dereks
 * Initial release of SDL (Simple DirectMedia Layer, a cross-platform multimedia library),
 * a video library code.
 *
 *
 */

#ifndef _PVSDL
#define _PVSDL

#if P_SDL

#include <ptlib.h>
#if defined(P_FREEBSD)
#include <SDL11/SDL.h>
#else
#include <SDL/SDL.h>
#endif

#include <ptlib/videoio.h>

#undef main


class PVideoOutputDevice_SDL : public PVideoOutputDevice
{
    PCLASSINFO(PVideoOutputDevice_SDL, PVideoOutputDevice);
  
  public:
    PVideoOutputDevice_SDL();
  
    ~PVideoOutputDevice_SDL();
  
    virtual PStringList GetDeviceNames() const;
  
    virtual BOOL Open(
      const PString & /*deviceName*/,   
      BOOL /*startImmediate*/ = TRUE    
    );
  
    virtual BOOL Close();
  
    virtual BOOL IsOpen();
  
    virtual BOOL SetColourFormat(
      const PString & colourFormat 
    );

    virtual BOOL SetFrameSize(
      unsigned width,   
      unsigned height   
    );

    virtual PINDEX GetMaxFrameBytes();

    virtual BOOL SetFrameData(
      unsigned x,
      unsigned y,
      unsigned width,
      unsigned height,
      const BYTE * data,
      BOOL endFrame = TRUE
    );

  protected:
    PDECLARE_NOTIFIER(PThread, PVideoOutputDevice_SDL, SDLThreadMain);
    bool InitialiseSDL();
    bool ProcessSDLEvents();

    PThread     * sdlThread;
    PSyncPoint    sdlStarted;
    PSyncPointAck sdlStop;
    PSyncPointAck adjustSize;
    bool          updateOverlay;
    PMutex        mutex;

    SDL_Surface * screen;
    SDL_Overlay * overlay;
  };


typedef PVideoOutputDevice_SDL PSDLVideoDevice; // Backward compatibility


PWLIB_STATIC_LOAD_PLUGIN(SDL, PVideoOutputDevice);

#endif    // P_SDL

#endif

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