173 lines
5.4 KiB
Java
Executable File
173 lines
5.4 KiB
Java
Executable File
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hslf.record;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.util.Date;
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import org.apache.poi.hslf.util.SystemTimeUtils;
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import org.apache.poi.util.LittleEndian;
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/**
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* An atom record that specifies information about external audio or video data.
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*
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* @author Yegor Kozlov
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*/
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public class ExMediaAtom extends RecordAtom
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{
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/**
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* A bit that specifies whether the audio or video data is repeated continuously during playback.
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*/
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public static final int fLoop = 1;
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/**
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* A bit that specifies whether the audio or video data is rewound after playing.
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*/
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public static final int fRewind = 2;
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/**
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* A bit that specifies whether the audio data is recorded narration for the slide show. It MUST be FALSE if this ExMediaAtom record is contained by an ExVideoContainer record.
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*/
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public static final int fNarration = 4;
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/**
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* Record header.
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*/
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private byte[] _header;
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/**
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* record data
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*/
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private byte[] _recdata;
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/**
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* Constructs a brand new link related atom record.
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*/
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protected ExMediaAtom() {
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_recdata = new byte[8];
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_header = new byte[8];
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LittleEndian.putShort(_header, 2, (short)getRecordType());
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LittleEndian.putInt(_header, 4, _recdata.length);
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}
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/**
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* Constructs the link related atom record from its
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* source data.
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*
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* @param source the source data as a byte array.
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* @param start the start offset into the byte array.
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* @param len the length of the slice in the byte array.
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*/
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protected ExMediaAtom(byte[] source, int start, int len) {
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// Get the header
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_header = new byte[8];
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System.arraycopy(source,start,_header,0,8);
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// Grab the record data
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_recdata = new byte[len-8];
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System.arraycopy(source,start+8,_recdata,0,len-8);
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}
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/**
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* Gets the record type.
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* @return the record type.
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*/
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public long getRecordType() { return RecordTypes.ExMediaAtom.typeID; }
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/**
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* Write the contents of the record back, so it can be written
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* to disk
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*
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* @param out the output stream to write to.
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* @throws java.io.IOException if an error occurs.
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*/
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public void writeOut(OutputStream out) throws IOException {
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out.write(_header);
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out.write(_recdata);
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}
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/**
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* A 4-byte unsigned integer that specifies an ID for an external object.
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*
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* @return A 4-byte unsigned integer that specifies an ID for an external object.
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*/
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public int getObjectId(){
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return LittleEndian.getInt(_recdata, 0);
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}
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/**
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* A 4-byte unsigned integer that specifies an ID for an external object.
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*
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* @param id A 4-byte unsigned integer that specifies an ID for an external object.
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*/
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public void setObjectId(int id){
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LittleEndian.putInt(_recdata, 0, id);
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}
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/**
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* A bit mask specifying options for displaying headers and footers
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*
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* @return A bit mask specifying options for displaying headers and footers
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*/
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public int getMask(){
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return LittleEndian.getInt(_recdata, 4);
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}
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/**
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* A bit mask specifying options for displaying video
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*
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* @param mask A bit mask specifying options for displaying video
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*/
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public void setMask(int mask){
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LittleEndian.putInt(_recdata, 4, mask);
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}
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/**
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* @param bit the bit to check
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* @return whether the specified flag is set
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*/
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public boolean getFlag(int bit){
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return (getMask() & bit) != 0;
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}
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/**
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* @param bit the bit to set
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* @param value whether the specified bit is set
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*/
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public void setFlag(int bit, boolean value){
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int mask = getMask();
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if(value) mask |= bit;
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else mask &= ~bit;
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setMask(mask);
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}
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public String toString(){
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StringBuffer buf = new StringBuffer();
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buf.append("ExMediaAtom\n");
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buf.append("\tObjectId: " + getObjectId() + "\n");
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buf.append("\tMask : " + getMask() + "\n");
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buf.append("\t fLoop : " + getFlag(fLoop) + "\n");
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buf.append("\t fRewind : " + getFlag(fRewind) + "\n");
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buf.append("\t fNarration : " + getFlag(fNarration) + "\n");
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return buf.toString();
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}
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}
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