gvcapture_test.h

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//
// Copyright (C) 2017 Graeme Walker
// 
// This program 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.
// 
// This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
// ===
///
/// \file gvcapture_test.h
///

#ifndef GV_CAPTURE_TEST__H
#define GV_CAPTURE_TEST__H

#include "gdef.h"
#include "gnet.h"
#include "gtimer.h"
#include "gvcapture.h"
#include "gvcapturebuffer.h"
#include "gvimagegenerator.h"

namespace Gv
{
    class CaptureTest ;
}

/// \class Gv::CaptureTest
/// A Gv::Capture implementation that serves up dummy frames created 
/// by a Gv::ImageGenerator.
/// 
class Gv::CaptureTest : public Gv::Capture , private GNet::EventExceptionHandler
{
public:
    CaptureTest( const std::string & config , ImageGenerator * ) ;
        ///< Constructor. Ownership of the new()ed ImageGenerator
        ///< is transferred.

    virtual ~CaptureTest() ;
        ///< Destructor.

    virtual void start() override ;
        ///< Override from Capture.

    virtual void stop() override ;
        ///< Override from Capture.

    virtual bool simple() const override ;
        ///< Override from Capture.

    virtual bool read( unsigned char * , size_t ) override ;
        ///< Override from Capture.

    virtual bool read( CaptureCallback & ) override ;
        ///< Override from Capture.

    virtual int fd() const override ;
        ///< Override from Capture.

    virtual unsigned int dx() const override ;
        ///< Override from Capture.

    virtual unsigned int dy() const override ;
        ///< Override from Capture.

    virtual bool active() const override ;
        ///< Override from Capture.

    virtual std::string info() const override ;
        ///< Override from Capture.

    static int dx( int ) ;
        ///< Static overload.

    static int dy( int ) ;
        ///< Static overload.

private:
    bool createSockets() ;
    void raiseEvent() ;
    void flushEvents() ;
    void readSocket() ;
    void onTimeout() ;
    virtual void onException( std::exception & ) override ;

private:
    int m_dx ;
    int m_dy ;
    ImageGenerator * m_generator ;
    bool m_capturing ;
    int m_fd_read ;
    int m_fd_write ;
    CaptureBufferFormat m_format ;
    CaptureBufferScale m_scale ;
    unique_ptr<CaptureBuffer> m_buffer ;
    std::string m_config ;
    GNet::Timer<CaptureTest> m_timer ;
    unsigned int m_sleep_ms ;
} ;

#endif