root/extra_lib/include/avcap/linux/V4L1_FormatManager.h

/*
 * (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>.
 */


#ifndef V4L1_FORMATMANAGER_H_
#define V4L1_FORMATMANAGER_H_

#include <linux/videodev.h>

#include "FormatManager.h"

namespace avcap
{
        class V4L1_DeviceDescriptor;
        
        //! This class implements the FormatManager for Video4Linux2 devices. */
        /*! This CaptureManager starts an own thread to capture data. 
         * The access to the internal buffer-list is synchronized, so \c release() can be called
         * from any thread at any time.
         */
                 
        class V4L1_FormatManager: public FormatManager
        {
        private:
                struct fmtdesc {
                        char    description[32];
                        __u16   palette;
                        __u32   fourcc;
                        float   sizefactor;
                };
                
                static const int mNumDescriptors = 18; 

                static const fmtdesc mDescriptors[mNumDescriptors];
                
                bool mIsOVFX2;
                
        public:
                V4L1_FormatManager(V4L1_DeviceDescriptor *dd);
                
                virtual ~V4L1_FormatManager();
                
                int setFormat(Format *fmt);
                
                int setFormat(unsigned int fourcc);

                Format* getFormat();
                
                int setResolution(int w, int h);
                
                int setBytesPerLine(int bpl);

                int getWidth();

                int getHeight();
                
                int getBytesPerLine();

                int flush();

                size_t getImageSize();

                const VideoStandard* getVideoStandard();

                int setVideoStandard(const VideoStandard* std);
                
                //! Setting the frame-rate is currently only possible for some philips-cams
                int setFramerate(int fps);
                
                int getFramerate();

                __u16 getPalette();
                
                void query();

        private:
                int getParams();

                void queryResolutions();
                
                __u16 getPalette(__u32 fourcc);
                
                int updateDimensions();
        };
}

#endif //V4L1_FORMATMANAGER_H_