root/extra_lib/include/avcap/linux/V4L1_VidCapManager.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_VIDCAPMANAGER_H_
#define V4L1_VIDCAPMANAGER_H_

#include <sys/types.h>
#include <list>
#include <time.h>

#include "CaptureManager.h"

namespace avcap
{
        class V4L1_DeviceDescriptor;
        class V4L1_FormatManager;
        class IOBuffer;
        class CaptureHandler;

        //! The Video4Linux2-API video capture manager.

        class V4L1_VidCapManager: public CaptureManager
        {
        private:
                typedef std::list<IOBuffer*> IOBufList_t;
                typedef std::list<int>           IndexList_t;
                                
                V4L1_DeviceDescriptor   *mDeviceDescriptor;
                V4L1_FormatManager              *mFormatMgr;
                
                IOBufList_t                     mBuffers;
                IndexList_t                     mCaptureIndices;
                
                int                                     mNumBufs;
                int                                     mMethod;
                int                                     mState;

                pthread_t*                      mThread;
                int                                     mFinish;
                pthread_mutex_t         mLock;
                timeval                         mStartTime;

                long                            mSequence;

                unsigned char*          mVideobuf;
                size_t                          mVideobufSize;
                int                                     mWidth;
                int                                     mHeight;
                unsigned int            mPalette;
                int                                     mAvailableBuffers;
                
        public:
        
                V4L1_VidCapManager(V4L1_DeviceDescriptor* dd, V4L1_FormatManager* fmt_mgr, int nbufs = DEFAULT_BUFFERS);
                
                virtual ~V4L1_VidCapManager();
                
                int init();
                
                int destroy();
                
                int startCapture();

                int stopCapture();
                
                int getNumIOBuffers();
                
        private:
                int start_read();

                int start_mmap();

                int stop_read();
                
                int stop_mmap();

                IOBuffer* dequeue();
                
                int enqueue(IOBuffer* buf);
                
                IOBuffer* findBuffer(int index);
                
                static void run(void* mgr);
                
                void clearBuffers();
                
                int getUsedBufferCount();
        };
};
#endif // V4L1_VIDCAPMANAGER_H_