| /* |
| * Copyright 2008 CoreMedia AG, Hamburg |
| * |
| * Licensed under the Apache License, Version 2.0 (the License); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an AS IS BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.googlecode.mp4parser; |
| |
| import com.coremedia.iso.BoxParser; |
| import com.coremedia.iso.boxes.Box; |
| import com.coremedia.iso.boxes.ContainerBox; |
| import com.googlecode.mp4parser.util.ByteBufferByteChannel; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.nio.channels.ReadableByteChannel; |
| import java.nio.channels.WritableByteChannel; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.logging.Logger; |
| |
| |
| /** |
| * Abstract base class suitable for most boxes acting purely as container for other boxes. |
| */ |
| public abstract class AbstractContainerBox extends AbstractBox implements ContainerBox { |
| private static Logger LOG = Logger.getLogger(AbstractContainerBox.class.getName()); |
| |
| protected List<Box> boxes = new LinkedList<Box>(); |
| protected BoxParser boxParser; |
| |
| @Override |
| protected long getContentSize() { |
| long contentSize = 0; |
| for (Box boxe : boxes) { |
| contentSize += boxe.getSize(); |
| } |
| return contentSize; |
| } |
| |
| public AbstractContainerBox(String type) { |
| super(type); |
| } |
| |
| public List<Box> getBoxes() { |
| return Collections.unmodifiableList(boxes); |
| } |
| |
| public void setBoxes(List<Box> boxes) { |
| this.boxes = new LinkedList<Box>(boxes); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T extends Box> List<T> getBoxes(Class<T> clazz) { |
| return getBoxes(clazz, false); |
| } |
| |
| @SuppressWarnings("unchecked") |
| public <T extends Box> List<T> getBoxes(Class<T> clazz, boolean recursive) { |
| List<T> boxesToBeReturned = new ArrayList<T>(2); |
| for (Box boxe : boxes) { |
| //clazz.isInstance(boxe) / clazz == boxe.getClass()? |
| // I hereby finally decide to use isInstance |
| |
| if (clazz.isInstance(boxe)) { |
| boxesToBeReturned.add((T) boxe); |
| } |
| |
| if (recursive && boxe instanceof ContainerBox) { |
| boxesToBeReturned.addAll(((ContainerBox) boxe).getBoxes(clazz, recursive)); |
| } |
| } |
| return boxesToBeReturned; |
| } |
| |
| /** |
| * Add <code>b</code> to the container and sets the parent correctly. |
| * |
| * @param b will be added to the container |
| */ |
| public void addBox(Box b) { |
| b.setParent(this); |
| boxes.add(b); |
| } |
| |
| public void removeBox(Box b) { |
| b.setParent(this); |
| boxes.remove(b); |
| } |
| |
| @Override |
| public void parse(ReadableByteChannel readableByteChannel, ByteBuffer header, long contentSize, BoxParser boxParser) throws IOException { |
| this.boxParser = boxParser; |
| super.parse(readableByteChannel, header, contentSize, boxParser); |
| } |
| |
| @Override |
| public void _parseDetails(ByteBuffer content) { |
| parseChildBoxes(content); |
| } |
| |
| |
| public String toString() { |
| StringBuilder buffer = new StringBuilder(); |
| |
| buffer.append(this.getClass().getSimpleName()).append("["); |
| for (int i = 0; i < boxes.size(); i++) { |
| if (i > 0) { |
| buffer.append(";"); |
| } |
| buffer.append(boxes.get(i).toString()); |
| } |
| buffer.append("]"); |
| return buffer.toString(); |
| } |
| |
| /** |
| * The number of bytes from box start (first length byte) to the |
| * first length byte of the first child box |
| * |
| * @return offset to first child box |
| */ |
| public long getNumOfBytesToFirstChild() { |
| return 8; |
| } |
| |
| @Override |
| protected void getContent(ByteBuffer byteBuffer) { |
| writeChildBoxes(byteBuffer); |
| } |
| |
| protected final void parseChildBoxes(ByteBuffer content) { |
| try { |
| while (content.remaining() >= 8) { // 8 is the minimal size for a sane box |
| boxes.add(boxParser.parseBox(new ByteBufferByteChannel(content), this)); |
| } |
| |
| if (content.remaining() != 0) { |
| setDeadBytes(content.slice()); |
| LOG.warning("Something's wrong with the sizes. There are dead bytes in a container box."); |
| } |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| protected final void writeChildBoxes(ByteBuffer bb) { |
| WritableByteChannel wbc = new ByteBufferByteChannel(bb); |
| for (Box box : boxes) { |
| try { |
| box.getBox(wbc); |
| } catch (IOException e) { |
| // My WritableByteChannel won't throw any excpetion |
| throw new RuntimeException("Cannot happen to me", e); |
| } |
| } |
| } |
| |
| } |