mipv4linput.h

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/*
    
  This file is a part of EMIPLIB, the EDM Media over IP Library.
  
  Copyright (C) 2006-2011  Hasselt University - Expertise Centre for
                      Digital Media (EDM) (http://www.edm.uhasselt.be)

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  
  USA

*/

#ifndef MIPV4LINPUT_H

#define MIPV4LINPUT_H

#include "mipconfig.h"

#ifdef MIPCONFIG_SUPPORT_VIDEO4LINUX

#include "mipcomponent.h"
#include "mipsignalwaiter.h"
#include "miptime.h"
#include <jthread/jthread.h>

class MIPRawYUV420PVideoMessage;

class EMIPLIB_IMPORTEXPORT MIPV4LInputParameters
{
public:
        MIPV4LInputParameters()                                                                 { }
        virtual ~MIPV4LInputParameters()                                                        { }
};

class EMIPLIB_IMPORTEXPORT MIPV4LInput : public MIPComponent, private jthread::JThread
{
public:
        MIPV4LInput();
protected:
        MIPV4LInput(const std::string &compName);
public:
        ~MIPV4LInput();

        bool open(const std::string &device = std::string("/dev/video0"), const MIPV4LInputParameters *pParams = 0);

        bool close();

        int getWidth() const                                                                    { if (m_device != -1) return m_width; return -1; }

        int getHeight() const                                                                   { if (m_device != -1) return m_height; return -1; }

        void setSourceID(uint64_t srcID)                                                        { m_sourceID = srcID; }

        uint64_t getSourceID() const                                                            { return m_sourceID; }
        
        bool push(const MIPComponentChain &chain, int64_t iteration, MIPMessage *pMsg);
        bool pull(const MIPComponentChain &chain, int64_t iteration, MIPMessage **pMsg);
protected:
        virtual bool subInit(int device, const MIPV4LInputParameters *pParams)                  { return true; }
private:
        void *Thread();

        int m_device;
        int m_width, m_height;
        uint8_t *m_pCurFrame;
        uint8_t *m_pFullFrame;
        uint8_t *m_pMsgFrame;
        size_t m_frameSize;
        MIPRawYUV420PVideoMessage *m_pVideoMsg;
        jthread::JMutex m_frameMutex;
        jthread::JMutex m_stopMutex;
        MIPSignalWaiter m_sigWait;
        bool m_gotMsg, m_stopLoop;
        bool m_gotFrame;
        MIPTime m_captureTime;
        uint64_t m_sourceID;
};

#endif // MIPCONFIG_SUPPORT_VIDEO4LINUX

#endif // MIPV4LINPUT_H