pffvdev.h

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/*
 * pffvdev.cxx
 *
 * Video device for ffmpeg
 *
 * Portable Windows Library
 *
 * Copyright (C) 2008 Post Increment
 *
 * 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
 * Craig Southeren <craigs@postincrement.com>
 *
 * All Rights Reserved.
 *
 * Contributor(s): ______________________________________.
 *
 * $Revision: 22673 $
 * $Author: rjongbloed $
 * $Date: 2009-05-19 23:07:44 -0500 (Tue, 19 May 2009) $
 */

#ifndef PTLIB_PFFVDEV_H
#define PTLIB_PFFVDEV_H

#ifdef P_USE_PRAGMA
#pragma interface
#endif

#include <ptlib.h>

#if P_VIDEO
#if P_FFVDEV

#include <ptlib/pipechan.h>
#include <ptclib/delaychan.h>

//
// This class defines a video capture (input) device that reads video from an FFMpeg command
//


class PVideoInputDevice_FFMPEG : public PVideoInputDevice
{
 PCLASSINFO(PVideoInputDevice_FFMPEG, PVideoInputDevice);
 public:
    PVideoInputDevice_FFMPEG();

    ~PVideoInputDevice_FFMPEG();


    PBoolean Open(
      const PString & deviceName,   
      PBoolean startImmediate = PTrue    
    );

    PBoolean IsOpen() ;

    PBoolean Close();

    PBoolean Start();

    PBoolean Stop();

    PBoolean IsCapturing();

    static PStringArray GetInputDeviceNames();

    virtual PStringArray GetDeviceNames() const
      { return GetInputDeviceNames(); }

    static bool GetDeviceCapabilities(
      const PString & /*deviceName*/, 
      Capabilities * /*caps*/         
    ) { return false; }

    virtual PINDEX GetMaxFrameBytes();

    virtual PBoolean GetFrameData(
      BYTE * buffer,                 
      PINDEX * bytesReturned = NULL  
    );

    virtual PBoolean GetFrameDataNoDelay(
      BYTE * buffer,                 
      PINDEX * bytesReturned = NULL  
    );


    virtual PBoolean SetVideoFormat(
      VideoFormat videoFormat   
    );

    virtual int GetNumChannels() ;

    virtual PBoolean SetChannel(
         int channelNumber  
    );
    
    virtual PBoolean SetColourFormat(
      const PString & colourFormat   // New colour format for device.
    );
    
    virtual PBoolean SetFrameRate(
      unsigned rate  
    );
         
    virtual PBoolean GetFrameSizeLimits(
      unsigned & minWidth,   
      unsigned & minHeight,  
      unsigned & maxWidth,   
      unsigned & maxHeight   
    ) ;

    virtual PBoolean SetFrameSize(
      unsigned width,   
      unsigned height   
    );

    void ClearMapping() { return ; }

    virtual PBoolean TestAllFormats()
      { return PTrue; }

 protected:
   unsigned       m_ffmpegFrameWidth;
   unsigned       m_ffmpegFrameHeight;
   unsigned       m_ffmpegFrameRate;
   unsigned       m_ffmpegFrameSize;
   PPipeChannel   m_command;
   PINDEX         m_videoFrameSize;
   unsigned       grabCount;
   PAdaptiveDelay pacing;
};


#endif // P_FFVDEV
#endif

#endif // PTLIB_PVFILEDEV_H


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