Examples with FinalSize org.olat.core.commons.services.thumbnail.FinalSize used on opensource projects

Example 1 with FinalSize

use of org.olat.core.commons.services.thumbnail.FinalSize in project OpenOLAT by OpenOLAT.

the class MetaInfoFileImpl method getThumbnailInfo.

private Thumbnail getThumbnailInfo(int maxWidth, int maxHeight, boolean fill) {
    for (Thumbnail thumbnail : thumbnails) {
        if (maxHeight == thumbnail.getMaxHeight() && maxWidth == thumbnail.getMaxWidth()) {
            if (thumbnail.exists()) {
                return thumbnail;
            }
        }
    }
    // generate a file name
    File metaLoc = metaFile.getParentFile();
    String name = originFile.getName();
    String extension = FileUtils.getFileSuffix(name);
    String nameOnly = name.substring(0, name.length() - extension.length() - 1);
    String randuuid = UUID.randomUUID().toString();
    String thumbnailExtension = preferedThumbnailType(extension);
    File thumbnailFile = new File(metaLoc, nameOnly + "_" + randuuid + "_" + maxHeight + "x" + maxWidth + (fill ? "xfill" : "") + "." + thumbnailExtension);
    // generate thumbnail
    long start = 0l;
    if (log.isDebug())
        start = System.currentTimeMillis();
    VFSLeaf thumbnailLeaf = new LocalFileImpl(thumbnailFile);
    VFSLeaf originLeaf = new LocalFileImpl(originFile);
    if (thumbnailService != null && thumbnailService.isThumbnailPossible(thumbnailLeaf)) {
        try {
            if (thumbnails.isEmpty()) {
                // be paranoid
                cannotGenerateThumbnail = true;
                write();
            }
            log.info("Start thumbnail: " + thumbnailLeaf);
            FinalSize finalSize = thumbnailService.generateThumbnail(originLeaf, thumbnailLeaf, maxWidth, maxHeight, fill);
            if (finalSize == null) {
                return null;
            } else {
                Thumbnail thumbnail = new Thumbnail();
                thumbnail.setMaxHeight(maxHeight);
                thumbnail.setMaxWidth(maxWidth);
                thumbnail.setFinalHeight(finalSize.getHeight());
                thumbnail.setFinalWidth(finalSize.getWidth());
                thumbnail.setFill(true);
                thumbnail.setThumbnailFile(thumbnailFile);
                thumbnails.add(thumbnail);
                cannotGenerateThumbnail = false;
                write();
                log.info("Create thumbnail: " + thumbnailLeaf);
                if (log.isDebug()) {
                    log.debug("Creation of thumbnail takes (ms): " + (System.currentTimeMillis() - start));
                }
                return thumbnail;
            }
        } catch (CannotGenerateThumbnailException e) {
            // don't try every time to create the thumbnail.
            cannotGenerateThumbnail = true;
            write();
            return null;
        }
    }
    return null;
}

Example 2 with FinalSize

use of org.olat.core.commons.services.thumbnail.FinalSize in project OpenOLAT by OpenOLAT.

the class ImageMagickHelper method thumbnailPDF.

@Override
public Size thumbnailPDF(VFSLeaf pdfFile, VFSLeaf thumbnailFile, int maxWidth, int maxHeight) {
    File baseFile = extractIOFile(pdfFile);
    File thumbnailBaseFile = extractIOFile(thumbnailFile);
    FinalSize finalSize = generateThumbnail(baseFile, thumbnailBaseFile, true, maxWidth, maxHeight, false);
    if (finalSize != null) {
        return new Size(finalSize.getWidth(), finalSize.getHeight(), true);
    }
    return null;
}

Example 3 with FinalSize

use of org.olat.core.commons.services.thumbnail.FinalSize in project OpenOLAT by OpenOLAT.

the class ImageMagickHelper method executeProcess.

private final FinalSize executeProcess(File thumbnailFile, Process proc) {
    FinalSize rv = null;
    StringBuilder errors = new StringBuilder();
    StringBuilder output = new StringBuilder();
    String line;
    InputStream stderr = proc.getErrorStream();
    InputStreamReader iserr = new InputStreamReader(stderr);
    BufferedReader berr = new BufferedReader(iserr);
    line = null;
    try {
        while ((line = berr.readLine()) != null) {
            errors.append(line);
        }
    } catch (IOException e) {
    // 
    }
    InputStream stdout = proc.getInputStream();
    InputStreamReader isr = new InputStreamReader(stdout);
    BufferedReader br = new BufferedReader(isr);
    line = null;
    try {
        while ((line = br.readLine()) != null) {
            output.append(line);
        }
    } catch (IOException e) {
    // 
    }
    if (log.isDebug()) {
        log.debug("Error: " + errors.toString());
        log.debug("Output: " + output.toString());
    }
    try {
        int exitValue = proc.waitFor();
        if (exitValue == 0) {
            rv = extractSizeFromOutput(thumbnailFile, output);
            if (rv == null) {
                // sometimes verbose info of convert is in stderr
                rv = extractSizeFromOutput(thumbnailFile, errors);
            }
        }
    } catch (InterruptedException e) {
    // 
    }
    if (rv == null) {
        log.warn("Could not generate thumbnail: " + thumbnailFile, null);
    }
    return rv;
}

Example 4 with FinalSize

use of org.olat.core.commons.services.thumbnail.FinalSize in project OpenOLAT by OpenOLAT.

the class ImageMagickHelper method extractSizeFromChuck.

private FinalSize extractSizeFromChuck(String chuck) {
    FinalSize size = null;
    if (chuck.indexOf('x') > 0) {
        String[] sizes = chuck.split("x");
        if (sizes.length == 2) {
            try {
                int width = Integer.parseInt(sizes[0]);
                int height = Integer.parseInt(sizes[1]);
                return new FinalSize(width, height);
            } catch (NumberFormatException e) {
                // not a number, it's possible
                if (log.isDebug()) {
                    log.debug("Not a size: " + chuck, null);
                }
            }
        }
    }
    return size;
}

Example 5 with FinalSize

use of org.olat.core.commons.services.thumbnail.FinalSize in project OpenOLAT by OpenOLAT.

the class MovieServiceImpl method generateThumbnail.

@Override
public FinalSize generateThumbnail(VFSLeaf file, VFSLeaf thumbnailFile, int maxWidth, int maxHeight, boolean fill) throws CannotGenerateThumbnailException {
    FinalSize size = null;
    if (file instanceof LocalFileImpl && thumbnailFile instanceof LocalFileImpl) {
        try {
            WorkThreadInformations.setInfoFiles(null, file);
            WorkThreadInformations.set("Generate thumbnail (video) VFSLeaf=" + file);
            File baseFile = ((LocalFileImpl) file).getBasefile();
            File scaledImage = ((LocalFileImpl) thumbnailFile).getBasefile();
            BufferedImage frame = FrameGrab.getFrame(baseFile, 20);
            Size scaledSize = ImageHelperImpl.calcScaledSize(frame, maxWidth, maxHeight);
            if (ImageHelperImpl.writeTo(frame, scaledImage, scaledSize, "jpeg")) {
                size = new FinalSize(scaledSize.getWidth(), scaledSize.getHeight());
            }
        // NullPointerException can be thrown if the jcodec cannot handle the codec of the movie
        // ArrayIndexOutOfBoundsException
        } catch (Exception | AssertionError e) {
            log.error("", e);
        } finally {
            WorkThreadInformations.unset();
        }
    }
    return size;
}