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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.googlecode.mp4parser.AbstractFullBox;
     22 
     23 import java.nio.ByteBuffer;
     24 
     25 /**
     26  * This box defines overall information which is media-independent, and relevant to the entire presentation
     27  * considered as a whole.
     28  */
     29 public class MediaHeaderBox extends AbstractFullBox {
     30     public static final String TYPE = "mdhd";
     31 
     32 
     33     private long creationTime;
     34     private long modificationTime;
     35     private long timescale;
     36     private long duration;
     37     private String language;
     38 
     39     public MediaHeaderBox() {
     40         super(TYPE);
     41     }
     42 
     43     public long getCreationTime() {
     44         return creationTime;
     45     }
     46 
     47     public long getModificationTime() {
     48         return modificationTime;
     49     }
     50 
     51     public long getTimescale() {
     52         return timescale;
     53     }
     54 
     55     public long getDuration() {
     56         return duration;
     57     }
     58 
     59     public String getLanguage() {
     60         return language;
     61     }
     62 
     63     protected long getContentSize() {
     64         long contentSize = 4;
     65         if (getVersion() == 1) {
     66             contentSize += 8 + 8 + 4 + 8;
     67         } else {
     68             contentSize += 4 + 4 + 4 + 4;
     69         }
     70         contentSize += 2;
     71         contentSize += 2;
     72         return contentSize;
     73 
     74     }
     75 
     76     public void setCreationTime(long creationTime) {
     77         this.creationTime = creationTime;
     78     }
     79 
     80     public void setModificationTime(long modificationTime) {
     81         this.modificationTime = modificationTime;
     82     }
     83 
     84     public void setTimescale(long timescale) {
     85         this.timescale = timescale;
     86     }
     87 
     88     public void setDuration(long duration) {
     89         this.duration = duration;
     90     }
     91 
     92     public void setLanguage(String language) {
     93         this.language = language;
     94     }
     95 
     96     @Override
     97     public void _parseDetails(ByteBuffer content) {
     98         parseVersionAndFlags(content);
     99         if (getVersion() == 1) {
    100             creationTime = IsoTypeReader.readUInt64(content);
    101             modificationTime = IsoTypeReader.readUInt64(content);
    102             timescale = IsoTypeReader.readUInt32(content);
    103             duration = IsoTypeReader.readUInt64(content);
    104         } else {
    105             creationTime = IsoTypeReader.readUInt32(content);
    106             modificationTime = IsoTypeReader.readUInt32(content);
    107             timescale = IsoTypeReader.readUInt32(content);
    108             duration = IsoTypeReader.readUInt32(content);
    109         }
    110         language = IsoTypeReader.readIso639(content);
    111         IsoTypeReader.readUInt16(content);
    112     }
    113 
    114 
    115     public String toString() {
    116         StringBuilder result = new StringBuilder();
    117         result.append("MediaHeaderBox[");
    118         result.append("creationTime=").append(getCreationTime());
    119         result.append(";");
    120         result.append("modificationTime=").append(getModificationTime());
    121         result.append(";");
    122         result.append("timescale=").append(getTimescale());
    123         result.append(";");
    124         result.append("duration=").append(getDuration());
    125         result.append(";");
    126         result.append("language=").append(getLanguage());
    127         result.append("]");
    128         return result.toString();
    129     }
    130 
    131     protected void getContent(ByteBuffer byteBuffer) {
    132         writeVersionAndFlags(byteBuffer);
    133         if (getVersion() == 1) {
    134             IsoTypeWriter.writeUInt64(byteBuffer, creationTime);
    135             IsoTypeWriter.writeUInt64(byteBuffer, modificationTime);
    136             IsoTypeWriter.writeUInt32(byteBuffer, timescale);
    137             IsoTypeWriter.writeUInt64(byteBuffer, duration);
    138         } else {
    139             IsoTypeWriter.writeUInt32(byteBuffer, creationTime);
    140             IsoTypeWriter.writeUInt32(byteBuffer, modificationTime);
    141             IsoTypeWriter.writeUInt32(byteBuffer, timescale);
    142             IsoTypeWriter.writeUInt32(byteBuffer, duration);
    143         }
    144         IsoTypeWriter.writeIso639(byteBuffer, language);
    145         IsoTypeWriter.writeUInt16(byteBuffer, 0);
    146     }
    147 }
    148