cxTestVideoSource.cpp

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
All rights reserved.

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modification, are permitted provided that the following conditions are met:

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   this list of conditions and the following disclaimer.

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   and/or other materials provided with the distribution.

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   may be used to endorse or promote products derived from this software 
   without specific prior written permission.

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#include "cxTestVideoSource.h"
#include <QTimer>
#include <vtkImageImport.h>
#include <vtkImageData.h>
#include "cxData.h"

namespace cx
{

TestVideoSource::TestVideoSource(QString uid, QString name, int width, int height)
{
        mUid = uid;
        mName = name;
        mConnected = false;
        mStreaming = false;
        mValidData = true;
        mInitialized = false;
        mFrames = 0;
        mResolution = 1;
        mWidth = width;
        mHeight = height;
        mImageImport = vtkImageImportPtr::New();
        setResolution(mResolution);
        mImageTimer = new QTimer(this);
        connect(mImageTimer, SIGNAL(timeout()), this, SLOT(processBuffer()));
        mBuffer = (uint8_t*)malloc(width * height * 3);

        mImageImport->SetDataScalarTypeToUnsignedChar();
        mImageImport->SetNumberOfScalarComponents(3);
        mImageImport->SetWholeExtent(0, mWidth - 1, 0, mHeight - 1, 0, 0);
        mImageImport->SetDataExtentToWholeExtent();
}

TestVideoSource::~TestVideoSource()
{
        stop();
        free(mBuffer);
}

void TestVideoSource::setResolution(double resolution)
{
        mResolution = resolution;
        mImageImport->SetDataSpacing(mResolution, mResolution, 1);
}

vtkImageDataPtr TestVideoSource::getVtkImageData()
{
        return mImageImport->GetOutput();
}

void TestVideoSource::start()
{
        if (mStreaming)
        {
                return;
        }
        if (!isConnected())
        {
                setConnected(true);
        }
        mStreaming = true;
        mImageTimer->start(40);
}

void TestVideoSource::stop()
{
        mImageTimer->stop();
        mStreaming = false;
}

static void TestImage(int width, int height, int frames, uint8_t *image, double mmPerPixel)
{
        for (int x = 0; x < width; ++x)
        {
                for (int y = 0; y < height; ++y)
                {
                        uint8_t *pix = &image[(y*width + x) * 3];
                        pix[0] = (x*255/width)+frames;
                        pix[1] = (y*255/height)+frames;
                        pix[2] = 127;
                        double mmPerPixel = 0.1;
                        if ( (int)(x * mmPerPixel) % 10 == 0)
                        {
                                uint8_t *pix = &image[(y*width + x) * 3];
                                pix[0] = 0;
                                pix[1] = 0;
                                pix[2] = 0;
                        }
                }
        }
}

void TestVideoSource::processBuffer()
{
        TestImage(mWidth, mHeight, mFrames, mBuffer, mResolution);
        mFrames++;
        mImageImport->SetImportVoidPointer(mBuffer);
        mImageImport->Update();
        mImageImport->Modified();
        mInitialized = true;
        emit newFrame();
}

double TestVideoSource::getTimestamp()
{
        return (double) mImageImport->GetOutput()->GetMTime();
}

TimeInfo TestVideoSource::getAdvancedTimeInfo()
{
        TimeInfo retval;
        retval.mAcquisitionTime.setMSecsSinceEpoch(this->getTimestamp());
        return retval;
}

} // namespace cx