root/extra_lib/include/avcap/windows/DS_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 DSVIDCAPMANAGER_H_
#define DSVIDCAPMANAGER_H_

#include <list>

#include "CaptureManager.h"
#include "SampleGrabberCallback.h"
#include "avcap-export.h"

namespace avcap
{
class DS_DeviceDescriptor;
class DS_FormatManager;
class IOBuffer;
class CaptureHandler;
class SampleGrabberCallback;

        //! Implementation of the CaptureManager for DirectShow.

        class AVCAP_Export DS_VidCapManager : public CaptureManager
        {
        private:
                typedef std::list<IOBuffer*> IOBufList;
                
                DS_DeviceDescriptor*    mDSDeviceDescriptor;
                SampleGrabberCallback*  mGrabberCallback;
                HANDLE                                  mLock;
                int                                     mSequence;
                int                                     mNumBuffers;

        public:
                DS_VidCapManager(DS_DeviceDescriptor* dd, DS_FormatManager* fmt_mgr,
                                int nbufs = DEFAULT_BUFFERS);
        
                virtual ~DS_VidCapManager();
        
                int init();
        
                int destroy();
        
                int startCapture();
        
                int stopCapture();
                
                int getNumIOBuffers();
        
        private:
                IOBuffer* dequeue();

                int enqueue(IOBuffer* buf);
        
                friend class IOBuffer;
                friend class SampleGrabberCallback;
        };

        class MutexGuard
        {
        private:
                HANDLE  mLock;
                
        public:
                inline MutexGuard(HANDLE lock) : 
                        mLock(lock)
                        { WaitForSingleObject(mLock, INFINITE); }
                        
                inline virtual ~MutexGuard()
                        { ReleaseMutex(mLock); }
        private:
                inline MutexGuard()
                        {}
        };
}

#endif // DSVIDCAPMANAGER_H_