1 /* 2 * Copyright 2012 Sebastian Annies, 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 package com.googlecode.mp4parser.authoring.tracks; 17 18 import com.coremedia.iso.boxes.*; 19 import com.googlecode.mp4parser.authoring.Track; 20 import com.googlecode.mp4parser.authoring.TrackMetaData; 21 22 import java.nio.ByteBuffer; 23 import java.util.ArrayList; 24 import java.util.LinkedList; 25 import java.util.List; 26 27 /** 28 * Changes the timescale of a track by wrapping the track. 29 */ 30 public class DivideTimeScaleTrack implements Track { 31 Track source; 32 private int timeScaleDivisor; 33 34 public DivideTimeScaleTrack(Track source, int timeScaleDivisor) { 35 this.source = source; 36 this.timeScaleDivisor = timeScaleDivisor; 37 } 38 39 public SampleDescriptionBox getSampleDescriptionBox() { 40 return source.getSampleDescriptionBox(); 41 } 42 43 public List<TimeToSampleBox.Entry> getDecodingTimeEntries() { 44 return adjustTts(); 45 } 46 47 public List<CompositionTimeToSample.Entry> getCompositionTimeEntries() { 48 return adjustCtts(); 49 } 50 51 public long[] getSyncSamples() { 52 return source.getSyncSamples(); 53 } 54 55 public List<SampleDependencyTypeBox.Entry> getSampleDependencies() { 56 return source.getSampleDependencies(); 57 } 58 59 public TrackMetaData getTrackMetaData() { 60 TrackMetaData trackMetaData = (TrackMetaData) source.getTrackMetaData().clone(); 61 trackMetaData.setTimescale(source.getTrackMetaData().getTimescale() / this.timeScaleDivisor); 62 return trackMetaData; 63 } 64 65 public String getHandler() { 66 return source.getHandler(); 67 } 68 69 public boolean isEnabled() { 70 return source.isEnabled(); 71 } 72 73 public boolean isInMovie() { 74 return source.isInMovie(); 75 } 76 77 public boolean isInPreview() { 78 return source.isInPreview(); 79 } 80 81 public boolean isInPoster() { 82 return source.isInPoster(); 83 } 84 85 public List<ByteBuffer> getSamples() { 86 return source.getSamples(); 87 } 88 89 90 List<CompositionTimeToSample.Entry> adjustCtts() { 91 List<CompositionTimeToSample.Entry> origCtts = this.source.getCompositionTimeEntries(); 92 if (origCtts != null) { 93 List<CompositionTimeToSample.Entry> entries2 = new ArrayList<CompositionTimeToSample.Entry>(origCtts.size()); 94 for (CompositionTimeToSample.Entry entry : origCtts) { 95 entries2.add(new CompositionTimeToSample.Entry(entry.getCount(), entry.getOffset() / timeScaleDivisor)); 96 } 97 return entries2; 98 } else { 99 return null; 100 } 101 } 102 103 List<TimeToSampleBox.Entry> adjustTts() { 104 List<TimeToSampleBox.Entry> origTts = source.getDecodingTimeEntries(); 105 LinkedList<TimeToSampleBox.Entry> entries2 = new LinkedList<TimeToSampleBox.Entry>(); 106 for (TimeToSampleBox.Entry e : origTts) { 107 entries2.add(new TimeToSampleBox.Entry(e.getCount(), e.getDelta() / timeScaleDivisor)); 108 } 109 return entries2; 110 } 111 112 public Box getMediaHeaderBox() { 113 return source.getMediaHeaderBox(); 114 } 115 116 public SubSampleInformationBox getSubsampleInformationBox() { 117 return source.getSubsampleInformationBox(); 118 } 119 120 @Override 121 public String toString() { 122 return "MultiplyTimeScaleTrack{" + 123 "source=" + source + 124 '}'; 125 } 126 } 127
