qtvid.h

使用VOIP技术.能够无连接接通远程用户

//
//  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 CPhone, a cross platform voip gui.
//
//  The Initial Developer of the Original Code is Derek Smithies.
//
//  Copyright (C) 2002 Indranet Technologies Ltd, 
//                                  http://www.indranet-technologies.com
//  All Rights Reserved.
//
//  Contributor(s): _______________


/*
 *
 *  $Log: qtvid.h,v $
 *  Revision 1.2  2003/04/04 04:37:49  dereksmithies
 *  Major upgrade.
 *  Ixj & microtelco support added. Fix threading issues.
 *
 *  Revision 1.1.1.1  2002/05/12 22:55:01  dereksmithies
 *  Initial release.
 *
 *
 *
 *
 */

#ifndef _CPhone_Qt_H
#define _CPhone_Qt_H

#include <ptlib.h>
#include <qimage.h>
#include "vdisplay.h"

/**Display data to the Qt screen.
  */
class QtVideoDevice : public PVideoOutputDevice
{
  PCLASSINFO(QtVideoDevice, PVideoOutputDevice);

 public:
  /**Constructor. Does not make a window. Initializes all variables;
   */
  QtVideoDevice(BOOL _isEncoding, VideoDisplay *_displayWidget, BOOL vertFlip);

  /**Destructor.  Closes window if necessary, (which initializes all variables)
   */
  ~QtVideoDevice();

  /**Open the device given the device name.
   */
  virtual BOOL Open(
		    const PString & deviceName,   /// Device name to open
		    BOOL startImmediate = TRUE    /// Immediately start device
		    )
    { return TRUE; }


  /**Synonymous with the destructor.
   */
  BOOL Close();
  
  /**Global test function to determine if this video rendering
     class is open.*/
  BOOL IsOpen();
  
  /**Take a YUV420P format image, render it on the existing window. 
     If the window is not present, there is no rendering.
  */
   BOOL Redraw (const void *videoFrame);


   virtual PString GetDeviceName() const
     { return "QtVideo"; }

  /**Get a list of all of the drivers available.
      */
   virtual PStringList GetDeviceNames() const;
   
   /**Get the maximum frame size in bytes.
      
   Note a particular device may be able to provide variable length
   frames (eg motion JPEG) so will be the maximum size of all frames.
   */
   virtual PINDEX GetMaxFrameBytes()
     { return 352 * 288 * 3 * 2; }
   

   /**Set size of the window. Closes existing window, opens new window.
    */
   BOOL SetFrameSize (unsigned _width ,unsigned _height);

   /**Get the video conversion vertical flip state
    */
   BOOL GetVFlipState();
   
   /**Set the video conversion vertical flip state
    */
   BOOL SetVFlipState(BOOL newVFlipState);
   
   /**Toggle the video conversion vertical flip state
    */
   BOOL ToggleVFlipState();
 
   void RemoveVideoImage();

   unsigned GetFrameWidth() const { return width; }
   
   unsigned GetFrameHeight() const { return height; }

   BOOL SetFrameData(
		     unsigned x,
		     unsigned y,
		     unsigned width,
		     unsigned height,
		     const BYTE * data,
		     BOOL endFrame = TRUE
    ) ;
   
   /**Indicate frame may be displayed.
    */
   BOOL EndFrame();

  protected:
   BOOL WriteLineSegment(int x, int y, unsigned len, const BYTE * data);
          
    BOOL         isEncoding;
    BOOL         doVerticalFlip;

 private:
    VideoDisplay *displayWidget;

    unsigned    width;
    unsigned    height;
};


/** Generate a text message on a YUV420P image plane.
  */
class PTextVideoInputDevice : public PFakeVideoInputDevice
{
  PCLASSINFO(PTextVideoInputDevice, PFakeVideoInputDevice);
  
 public:
  /**create a new video input device for generating text image on a qt system.
   */
  PTextVideoInputDevice();
  PTextVideoInputDevice(PString message);
  ~PTextVideoInputDevice();

  /*Get the names of the devices.
   */
  PStringList GetInputDeviceNames();

  /**find how many channels are available for use
   */
  int GetNumChannels();

  /** Set the size of the output frame, and alter colour 
     converter size.
  */
  BOOL SetFrameSize(unsigned width, unsigned height);

  /** Fill the destination frame with the required data.
   */
  BOOL GetFrameDataNoDelay(BYTE *destFrame, PINDEX * /*bytesReturned*/);

  void SetDisplayText(PString newText);

  /**Set the colour format to be used.
     
     Default behaviour sets the value of the colourFormat variable and then
     returns the IsOpen() status.
  */
  virtual BOOL SetColourFormat(const PString & colourFormat);
               // New colour format for device.

 protected:
  PString    text;

  Rgb32Image *rgbImage;
  PMutex      bufferMutex;
};

    
#endif

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