OpenCVVideoSource.cpp

/*****************************
 Copyright 2015 (c) Leonardo Malave. All rights reserved.
 
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#include "OculusARPOC.h"
#include "Engine.h"
#include "OpenCVVideoSource.h"
#include "opencv2/core/core.hpp"
#include "opencv2/highgui/highgui.hpp"
#include "opencv2/imgproc/imgproc.hpp"

OpenCVVideoSource::OpenCVVideoSource(uint8 cameraIndex, uint16 videoWidth, uint16 videoHeight)
{
    this->CameraIndex = cameraIndex;
    this->VideoWidth = videoWidth;
    this->VideoHeight = videoHeight;
}

OpenCVVideoSource::~OpenCVVideoSource()
{
}

uint16 OpenCVVideoSource::GetVideoWidth() {
    return VideoWidth;
}

void OpenCVVideoSource::SetVideoWidth(uint16 Width) {
    this->VideoWidth = Width;
}

uint16 OpenCVVideoSource::GetVideoHeight() {
    return VideoHeight;
}

void  OpenCVVideoSource::SetVideoHeight(uint16 Height) {
    this->VideoHeight = Height;
}


float OpenCVVideoSource::GetWidthToDistanceRatio() {
    return WidthToDistanceRatio;
}

float OpenCVVideoSource::GetHeightToDistanceRatio() {
    return HeightToDistanceRatio;
}

void OpenCVVideoSource::Init() {
    cv::VideoCapture VidCap(CameraIndex);
    this->VideoCapture = VidCap;
    if (VideoCapture.isOpened()) {
        VideoCapture.set(CV_CAP_PROP_FRAME_WIDTH, VideoWidth);
        VideoCapture.set(CV_CAP_PROP_FRAME_HEIGHT, VideoHeight);
    }
}

void OpenCVVideoSource::Close() {
	VideoCapture.release();
}

void OpenCVVideoSource::GetFrameImage(uint8* DestinationFrameBuffer) {
    cv::Mat Frame;
    VideoCapture >> Frame; // get a new frame from camera
    uint16 Width = Frame.size().width;
    uint16 Height = Frame.size().height;
    uint8* RawFrameBuffer = (uint8*) Frame.data;
    uint8* DestinationPointer = NULL;
    uint8* SourcePointer = NULL;
	
    uint8 RedChannel;
    uint8 GreenChannel;
    uint8 BlueChannel;

    bool CameraUpsideDown = true;
	if (RawFrameBuffer != NULL) {
        if (CameraUpsideDown) { // draw bottom to top and right to left to flip image
            SourcePointer = RawFrameBuffer;
            for (int32 y = 0; y < VideoHeight; y++)
            {
                DestinationPointer = &DestinationFrameBuffer[(VideoHeight - y) * VideoWidth * sizeof(FColor) - 1];
                for (int32 x = 0; x < VideoWidth; x++)
                {
                    BlueChannel  = *SourcePointer++;
                    GreenChannel = *SourcePointer++;
                    RedChannel  = *SourcePointer++;
                    *DestinationPointer-- = 0xFF;
                    *DestinationPointer-- = RedChannel;
                    *DestinationPointer-- = GreenChannel;
                    *DestinationPointer-- = BlueChannel;
               }
            }
        } else {
            DestinationPointer = DestinationFrameBuffer;
            SourcePointer = RawFrameBuffer;
            for (int32 y = 0; y < VideoHeight; y++)
            {
                for (int32 x = 0; x < VideoWidth; x++)
                {
                    *DestinationPointer++ = *SourcePointer++;
                    *DestinationPointer++ = *SourcePointer++;
                    *DestinationPointer++ = *SourcePointer++;
                    *DestinationPointer++ = 0xFF;
                }
            }
        }
    }
}