root/extra_lib/include/avcap/linux/AVC_FormatManager.h

INCLUDED FROM

/*
 * (c) 2005, 2008 Nico Pranke <Nico.Pranke@googlemail.com>, Robin Luedtke <RobinLu@gmx.de> 
 *
 * This file is part of avcap.
 *
 * avcap is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * avcap is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with avcap.  If not, see <http://www.gnu.org/licenses/>.
 */

/* avcap is free for non-commercial use.
 * To use it in commercial endeavors, please contact Nico Pranke <Nico.Pranke@googlemail.com>
 */


#ifdef HAS_AVC_SUPPORT

#ifndef AVC_FORMATMANAGER_H_
#define AVC_FORMATMANAGER_H_

#include "FormatManager.h"

namespace avcap
{
        class AVC_DeviceDescriptor;
        
        //! Implementation of the FormatManager for AV/C devices. 
          
        /*! DV-Cams usually provide only a fixed resolution (PAL: 720x576, NTSC: 720x480)
         * YUV-format and no choice of video standards.
         * Additionally, this manager provides RGB.*/
         
        class AVC_FormatManager: public FormatManager
        {
        private:
                bool mIsPal;
                
        public:
                AVC_FormatManager(AVC_DeviceDescriptor *dd);
                
                virtual ~AVC_FormatManager();
                
                //! Set the image with. 
                /*! For AV/C -devices the reolution is fixed and thus can't be realy modified.
                 * \param w: width
                 * \param h: height
                 * \return 0, if the desired resolution matches the native resolution, -1 else*/
                int setResolution(int w, int h);

                //! Get the current framerate. Setting the framerate is not possible.
                /*! \return 25 for PAL, 30 for NTSC(this is a little bit inaccurate, since the proper NTSC-frame rate is 29.97 fps)*/
                inline int getFramerate() { return mIsPal ? 25 : 30; }
                
                void query();
        };
};
#endif // AVC_FORMATMANAGER_H_

#endif // HAS_AVC_SUPPORT