VideoSource.h

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/*
 *  VideoSource.h
 *  ARToolKit5
 *
 *  This file is part of ARToolKit.
 *
 *  ARToolKit 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 3 of the License, or
 *  (at your option) any later version.
 *
 *  ARToolKit 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 ARToolKit.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  As a special exception, the copyright holders of this library give you
 *  permission to link this library with independent modules to produce an
 *  executable, regardless of the license terms of these independent modules, and to
 *  copy and distribute the resulting executable under terms of your choice,
 *  provided that you also meet, for each linked independent module, the terms and
 *  conditions of the license of that module. An independent module is a module
 *  which is neither derived from nor based on this library. If you modify this
 *  library, you may extend this exception to your version of the library, but you
 *  are not obligated to do so. If you do not wish to do so, delete this exception
 *  statement from your version.
 *
 *  Copyright 2015 Daqri, LLC.
 *  Copyright 2010-2015 ARToolworks, Inc.
 *
 *  Author(s): Julian Looser, Philip Lamb
 *
 */

#ifndef VIDEOSOURCE_H
#define VIDEOSOURCE_H

#include "Platform.h"

#include <AR/ar.h>
#include <AR/video.h>

#include <ARWrapper/Image.h>

#ifndef _WINRT
#  if TARGET_PLATFORM_ANDROID || TARGET_PLATFORM_IOS
#    include <AR/gsub_es.h>
#  else
#    include <AR/gsub_lite.h>
  #endif
#endif

class VideoSource {

protected:

        typedef enum {
                DEVICE_CLOSED,                                  
                DEVICE_OPEN,                                    
        DEVICE_GETTING_READY,           
                DEVICE_RUNNING                                  
        } DeviceState;
    
        DeviceState deviceState;                        

        char* cameraParam;                                      
        char* cameraParamBuffer;
        size_t cameraParamBufferLen;
        ARParamLT *cparamLT;                            

        char* videoConfiguration;                       

        int videoWidth;                                         
        int videoHeight;                                        

        AR_PIXEL_FORMAT pixelFormat;            
#if defined(HAVE_ARM_NEON) || defined(HAVE_ARM64_NEON)
    int m_fastPath;
#endif
#ifndef _WINRT
        GLenum glPixIntFormat;
    GLenum glPixFormat;
    GLenum glPixType;
#endif

    ARUint8 *frameBuffer;               
    ARUint8 *frameBuffer2;              
        int frameStamp;                                         
    
    int m_error;
    void setError(int error);

        VideoSource();
        
public:

        static VideoSource* newVideoSource();
    
        virtual ~VideoSource();

    int getError();

        bool isOpen();

        bool isRunning();
    
        void configure(const char* vconf, const char* cparaName, const char* cparaBuff, size_t cparaBuffLen);


        ARParamLT* getCameraParameters();

        int getVideoWidth();
        
        int getVideoHeight();

        AR_PIXEL_FORMAT getPixelFormat();

        virtual const char* getName() = 0;
        
        virtual bool open() = 0;
        
        virtual bool close() = 0;

        virtual bool captureFrame() = 0;

        ARUint8* getFrame();

        int getFrameStamp();

        bool updateTexture(Color* buffer);

    bool fastPath();
    bool updateTexture32(uint32_t *buffer);
    
#ifndef _WINRT

        void updateTextureGL(int textureID);
#endif
};

#endif // !VIDEOSOURCE_H