private void build(ImageSegment segment) throws IOException {
SortedSet<ImageSegment> set = segments.get(segment.getId());
if (set == null) {
set = new TreeSet<>();
segments.put(segment.getId(), set);
}
set.add(segment);
segment = set.last();
if (segment.isLast() && set.size() > segment.getIndex()) {
segments.remove(segment.getId());
build(set);
}
}
private void breakDown(final ImageData img) throws IOException {
try (ByteArrayOutputStream bos = new ByteArrayOutputStream()) {
ImageIO.write(img.getImage(), "png", bos);
final byte[] image = bos.toByteArray();
ImageSegment prev = null;
for (int i = 0; i < image.length; i += BUFFER_SIZE) {
final byte[] buffer = new byte[BUFFER_SIZE];
final int num = Math.min(BUFFER_SIZE, image.length - i);
for (int j = 0; j < num; ++j) {
buffer[j] = image[i + j];
}
int index = 0;
if (prev != null) {
index = prev.getIndex() + 1;
sendData(prev);
}
prev = new ImageSegment(img.getTimestamp(), id, index, buffer, num, false);
}
if (prev != null) {
sendData(
new ImageSegment(
prev.getTimestamp(),
prev.getId(),
prev.getIndex(),
prev.getData(),
prev.getNum(),
true));
}
id += 1;
}
}