cxPlaybackUSAcquisitionVideo.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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   this list of conditions and the following disclaimer in the documentation 
   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.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
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#include "cxPlaybackUSAcquisitionVideo.h"
#include <QStringList>
#include <QDir>
#include <QtCore>
#include <boost/bind.hpp>
#include "vtkImageImport.h"
#include "vtkImageData.h"
#include "cxTypeConversions.h"
#include "cxUsReconstructionFileReader.h"
#include "cxTestVideoSource.h"
#include "cxTrackingService.h"
//#include "cxProbeImpl.h"
#include "cxUSFrameData.h"
#include "cxPlaybackTime.h"

#include "cxBasicVideoSource.h"
#include "cxImage.h"
#include "cxImageDataContainer.h"
#include "cxVideoServiceBackend.h"
#include "cxFileHelpers.h"
#include <QtConcurrent>
#include "cxTool.h"

namespace cx
{

USAcquisitionVideoPlayback::USAcquisitionVideoPlayback(VideoServiceBackendPtr backend) :
        QObject(NULL),
        mVideoSourceUid("playback")
{
        mBackend = backend;
        mVideoSource.reset(new BasicVideoSource(mVideoSourceUid));
        mVideoSource->setStatusString(QString("No US Acquisition"));

        connect(&mUSImageDataFutureWatcher, SIGNAL(finished()), this, SLOT(usDataLoadFinishedSlot()));
}

USAcquisitionVideoPlayback::~USAcquisitionVideoPlayback()
{
}

VideoSourcePtr USAcquisitionVideoPlayback::getVideoSource()
{
        return mVideoSource;
}

bool USAcquisitionVideoPlayback::isActive() const
{
        return mTimer ? true : false;
}

void USAcquisitionVideoPlayback::setTime(PlaybackTimePtr controller)
{
        if (mTimer)
                disconnect(mTimer.get(), SIGNAL(changed()), this, SLOT(timerChangedSlot()));
        mTimer = controller;
        if (mTimer)
                connect(mTimer.get(), SIGNAL(changed()), this, SLOT(timerChangedSlot()));

        if (controller)
        {
                mVideoSource->start();
        }
        else
        {
                mVideoSource->deconfigure();
        }
}

void USAcquisitionVideoPlayback::setRoot(const QString path)
{
        mRoot = path;
        mEvents = this->getEvents();
}

std::vector<TimelineEvent> USAcquisitionVideoPlayback::getEvents()
{
        std::vector<TimelineEvent> events;

        QStringList allFiles = this->getAbsolutePathToFtsFiles(mRoot);
        for (int i=0; i<allFiles.size(); ++i)
        {
                UsReconstructionFileReader reader;
                std::vector<TimedPosition> timestamps = reader.readFrameTimestamps(allFiles[i]);

                if (timestamps.empty())
                        continue;

                TimelineEvent current(
                                                QString("Acquisition %1").arg(QFileInfo(allFiles[i]).fileName()),
                                                timestamps.front().mTime,
                                                timestamps.back().mTime);
                current.mUid = allFiles[i];
                current.mGroup = "acquisition";
                current.mColor = QColor::fromHsv(36, 255, 222);

                events.push_back(current);

        }

        return events;
}

QStringList USAcquisitionVideoPlayback::getAbsolutePathToFtsFiles(QString folder)
{
        return getAbsolutePathToFiles(folder, QStringList("*.fts"), true);
}

void USAcquisitionVideoPlayback::timerChangedSlot()
{
        TimelineEvent event;
        for (unsigned i=0; i<mEvents.size(); ++i)
        {
                if (mEvents[i].isInside(mTimer->getTime().toMSecsSinceEpoch()))
                {
                        event = mEvents[i];
                        break;
                }
        }

        this->loadFullData(event.mUid);
        this->updateFrame(event.mUid);
}

void USAcquisitionVideoPlayback::loadFullData(QString filename)
{
        //       if same filename, ok and return
        if (filename == mCurrentData.mFilename)
                return;

        mVideoSource->setInfoString(QString(""));
        mVideoSource->setStatusString(QString("No US Acquisition"));
        mVideoSource->deconfigure();

        // if no data: ignore but keep the already loaded data
        if (filename.isEmpty())
                return;

        // clear data
        mCurrentData = USReconstructInputData();

        // if no new data, return
        if (filename.isEmpty())
                return;

        // load new data
        // start an asynchronous read of data
        if (!mUSImageDataReader)
        {
                mUSImageDataReader.reset(new UsReconstructionFileReader());
                mUSImageDataFutureResult = QtConcurrent::run(boost::bind(&UsReconstructionFileReader::readAllFiles, mUSImageDataReader, filename, ""));
                mUSImageDataFutureWatcher.setFuture(mUSImageDataFutureResult);
        }
}

void USAcquisitionVideoPlayback::usDataLoadFinishedSlot()
{
        // file read operation has completed: read and clear
        mCurrentData = mUSImageDataFutureResult.result();
        mCurrentData.mProbeData.mData.setUid(mVideoSourceUid);
        // clear result so we can check for it next run
        mUSImageDataReader.reset();

        mVideoSource->start();

        // set the probe sector from file data:
        ToolPtr tool = mBackend->getToolManager()->getFirstProbe();
        if (tool)
        {
                ProbePtr probe = tool->getProbe();
                if (probe)
                        probe->setProbeSector(mCurrentData.mProbeData.mData);
        }

        // create a vector to allow for quick search
        mCurrentTimestamps.clear();
        for (unsigned i=0; i<mCurrentData.mFrames.size(); ++i)
                mCurrentTimestamps.push_back(mCurrentData.mFrames[i].mTime);

        this->updateFrame(mCurrentData.mFilename);
}

void  USAcquisitionVideoPlayback::updateFrame(QString filename)
{
        if (mUSImageDataReader)
        {
                mVideoSource->setInfoString(QString("Loading US Data..."));
                mVideoSource->setStatusString(QString("Loading US Data..."));
                mVideoSource->setInput(ImagePtr());
                return;
        }

        if (mCurrentData.mFilename.isEmpty() || !mCurrentData.mUsRaw || filename!=mCurrentData.mFilename)
        {
                mVideoSource->setInfoString(QString(""));
                mVideoSource->setStatusString(QString("No US Acquisition"));
                mVideoSource->setInput(ImagePtr());
                return;
        }

        // if not already started:
        mVideoSource->start();

        double timestamp = mTimer->getTime().toMSecsSinceEpoch();

        // find index of current frame: Use the last frame _before_ the current timestamp.
        std::vector<double>::iterator iter = std::lower_bound(mCurrentTimestamps.begin(), mCurrentTimestamps.end(), timestamp);
        if (iter==mCurrentTimestamps.begin())
                return;
        --iter; // use the frame before, not after.
        int index = std::distance(mCurrentTimestamps.begin(), iter);

        int timeout = 1000; // invalidate data if timestamp differ from time too much
        mVideoSource->overrideTimeout(fabs(timestamp-*iter)>timeout);

        ImagePtr image(new Image(mVideoSourceUid, mCurrentData.mUsRaw->getImageContainer()->get(index)));
        image->setAcquisitionTime(QDateTime::fromMSecsSinceEpoch(timestamp));

        mVideoSource->setInfoString(QString("%1 - Frame %2").arg(mCurrentData.mUsRaw->getName()).arg(index));
        if (mVideoSource->validData())
                mVideoSource->setStatusString(QString(""));
        else
                mVideoSource->setStatusString(QString("Timeout"));

        mVideoSource->setInput(image);
}



} // cx