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      1 /*
      2  * Copyright 2008 CoreMedia AG, Hamburg
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the License);
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *     http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an AS IS BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.coremedia.iso.boxes;
     18 
     19 import com.coremedia.iso.IsoTypeReader;
     20 import com.coremedia.iso.IsoTypeWriter;
     21 import com.coremedia.iso.Utf8;
     22 import com.googlecode.mp4parser.AbstractFullBox;
     23 
     24 import java.nio.ByteBuffer;
     25 
     26 /**
     27  * List of keywords according to 3GPP 26.244.
     28  */
     29 public class KeywordsBox extends AbstractFullBox {
     30     public static final String TYPE = "kywd";
     31 
     32     private String language;
     33     private String[] keywords;
     34 
     35     public KeywordsBox() {
     36         super(TYPE);
     37     }
     38 
     39     public String getLanguage() {
     40         return language;
     41     }
     42 
     43     public String[] getKeywords() {
     44         return keywords;
     45     }
     46 
     47     public void setLanguage(String language) {
     48         this.language = language;
     49     }
     50 
     51     public void setKeywords(String[] keywords) {
     52         this.keywords = keywords;
     53     }
     54 
     55     protected long getContentSize() {
     56         long contentSize = 7;
     57         for (String keyword : keywords) {
     58             contentSize += 1 + Utf8.utf8StringLengthInBytes(keyword) + 1;
     59         }
     60         return contentSize;
     61     }
     62 
     63     @Override
     64     public void _parseDetails(ByteBuffer content) {
     65         parseVersionAndFlags(content);
     66         language = IsoTypeReader.readIso639(content);
     67         int keywordCount = IsoTypeReader.readUInt8(content);
     68         keywords = new String[keywordCount];
     69         for (int i = 0; i < keywordCount; i++) {
     70             IsoTypeReader.readUInt8(content);
     71             keywords[i] = IsoTypeReader.readString(content);
     72         }
     73     }
     74 
     75     @Override
     76     protected void getContent(ByteBuffer byteBuffer) {
     77         writeVersionAndFlags(byteBuffer);
     78         IsoTypeWriter.writeIso639(byteBuffer, language);
     79         IsoTypeWriter.writeUInt8(byteBuffer, keywords.length);
     80         for (String keyword : keywords) {
     81             IsoTypeWriter.writeUInt8(byteBuffer, Utf8.utf8StringLengthInBytes(keyword) + 1);
     82             byteBuffer.put(Utf8.convert(keyword));
     83         }
     84     }
     85 
     86     public String toString() {
     87         StringBuffer buffer = new StringBuffer();
     88         buffer.append("KeywordsBox[language=").append(getLanguage());
     89         for (int i = 0; i < keywords.length; i++) {
     90             buffer.append(";keyword").append(i).append("=").append(keywords[i]);
     91         }
     92         buffer.append("]");
     93         return buffer.toString();
     94     }
     95 }
     96