| /* ==================================================================== |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You 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 org.apache.poi.hslf.record; |
| |
| import java.io.IOException; |
| import java.io.OutputStream; |
| import java.util.Arrays; |
| import java.util.Map; |
| import java.util.function.Supplier; |
| |
| import org.apache.poi.util.GenericRecordUtil; |
| import org.apache.poi.util.IOUtils; |
| import org.apache.poi.util.LittleEndian; |
| |
| /** |
| * Storage for embedded sounds. |
| * |
| * @author Yegor Kozlov |
| */ |
| public final class SoundData extends RecordAtom { |
| |
| |
| //arbitrarily selected; may need to increase |
| private static final int MAX_RECORD_LENGTH = 100_000_000; |
| |
| /** |
| * Record header. |
| */ |
| private byte[] _header; |
| |
| /** |
| * Record data. |
| */ |
| private byte[] _data; |
| |
| /** |
| * Constructs a new empty sound container. |
| */ |
| protected SoundData() { |
| _header = new byte[8]; |
| _data = new byte[0]; |
| |
| LittleEndian.putShort(_header, 2, (short)getRecordType()); |
| LittleEndian.putInt(_header, 4, _data.length); |
| } |
| |
| /** |
| * Constructs the link related atom record from its |
| * source data. |
| * |
| * @param source the source data as a byte array. |
| * @param start the start offset into the byte array. |
| * @param len the length of the slice in the byte array. |
| */ |
| protected SoundData(byte[] source, int start, int len) { |
| // Get the header. |
| _header = Arrays.copyOfRange(source, start, start+8); |
| |
| // Get the record data. |
| _data = IOUtils.safelyClone(source, start+8, len-8, MAX_RECORD_LENGTH); |
| } |
| |
| /** |
| * Returns the sound data. |
| * |
| * @return the sound data |
| */ |
| public byte[] getData() { |
| return _data; |
| } |
| |
| /** |
| * Gets the record type. |
| * |
| * @return the record type. |
| */ |
| public long getRecordType() { |
| return RecordTypes.SoundData.typeID; |
| } |
| |
| /** |
| * Write the contents of the record back, so it can be written |
| * to disk. |
| * |
| * @param out the output stream to write to. |
| * @throws java.io.IOException if an error occurs. |
| */ |
| public void writeOut(OutputStream out) throws IOException { |
| out.write(_header); |
| out.write(_data); |
| } |
| |
| @Override |
| public Map<String, Supplier<?>> getGenericProperties() { |
| return GenericRecordUtil.getGenericProperties("data", this::getData); |
| } |
| } |