diff options
Diffstat (limited to 'isoparser/src/main/java/com/googlecode/mp4parser/authoring/tracks/MultiplyTimeScaleTrack.java')
-rw-r--r-- | isoparser/src/main/java/com/googlecode/mp4parser/authoring/tracks/MultiplyTimeScaleTrack.java | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/isoparser/src/main/java/com/googlecode/mp4parser/authoring/tracks/MultiplyTimeScaleTrack.java b/isoparser/src/main/java/com/googlecode/mp4parser/authoring/tracks/MultiplyTimeScaleTrack.java new file mode 100644 index 0000000..e9a90e4 --- /dev/null +++ b/isoparser/src/main/java/com/googlecode/mp4parser/authoring/tracks/MultiplyTimeScaleTrack.java @@ -0,0 +1,130 @@ +/* + * Copyright 2012 Sebastian Annies, Hamburg + * + * Licensed 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 com.googlecode.mp4parser.authoring.tracks; + +import com.coremedia.iso.boxes.*; +import com.googlecode.mp4parser.authoring.Movie; +import com.googlecode.mp4parser.authoring.Track; +import com.googlecode.mp4parser.authoring.TrackMetaData; + +import java.nio.ByteBuffer; +import java.util.ArrayList; +import java.util.LinkedList; +import java.util.List; + +import static com.googlecode.mp4parser.util.CastUtils.l2i; +import static com.googlecode.mp4parser.util.Math.gcd; +import static com.googlecode.mp4parser.util.Math.lcm; +import static java.lang.Math.round; + +/** + * Changes the timescale of a track by wrapping the track. + */ +public class MultiplyTimeScaleTrack implements Track { + Track source; + private int timeScaleFactor; + + public MultiplyTimeScaleTrack(Track source, int timeScaleFactor) { + this.source = source; + this.timeScaleFactor = timeScaleFactor; + } + + public SampleDescriptionBox getSampleDescriptionBox() { + return source.getSampleDescriptionBox(); + } + + public List<TimeToSampleBox.Entry> getDecodingTimeEntries() { + return adjustTts(source.getDecodingTimeEntries(), timeScaleFactor); + } + + public List<CompositionTimeToSample.Entry> getCompositionTimeEntries() { + return adjustCtts(source.getCompositionTimeEntries(), timeScaleFactor); + } + + public long[] getSyncSamples() { + return source.getSyncSamples(); + } + + public List<SampleDependencyTypeBox.Entry> getSampleDependencies() { + return source.getSampleDependencies(); + } + + public TrackMetaData getTrackMetaData() { + TrackMetaData trackMetaData = (TrackMetaData) source.getTrackMetaData().clone(); + trackMetaData.setTimescale(source.getTrackMetaData().getTimescale() * this.timeScaleFactor); + return trackMetaData; + } + + public String getHandler() { + return source.getHandler(); + } + + public boolean isEnabled() { + return source.isEnabled(); + } + + public boolean isInMovie() { + return source.isInMovie(); + } + + public boolean isInPreview() { + return source.isInPreview(); + } + + public boolean isInPoster() { + return source.isInPoster(); + } + + public List<ByteBuffer> getSamples() { + return source.getSamples(); + } + + + static List<CompositionTimeToSample.Entry> adjustCtts(List<CompositionTimeToSample.Entry> source, int timeScaleFactor) { + if (source != null) { + List<CompositionTimeToSample.Entry> entries2 = new ArrayList<CompositionTimeToSample.Entry>(source.size()); + for (CompositionTimeToSample.Entry entry : source) { + entries2.add(new CompositionTimeToSample.Entry(entry.getCount(), timeScaleFactor * entry.getOffset())); + } + return entries2; + } else { + return null; + } + } + + static List<TimeToSampleBox.Entry> adjustTts(List<TimeToSampleBox.Entry> source, int timeScaleFactor) { + LinkedList<TimeToSampleBox.Entry> entries2 = new LinkedList<TimeToSampleBox.Entry>(); + for (TimeToSampleBox.Entry e : source) { + entries2.add(new TimeToSampleBox.Entry(e.getCount(), timeScaleFactor * e.getDelta())); + } + return entries2; + } + + public Box getMediaHeaderBox() { + return source.getMediaHeaderBox(); + } + + public SubSampleInformationBox getSubsampleInformationBox() { + return source.getSubsampleInformationBox(); + } + + @Override + public String toString() { + return "MultiplyTimeScaleTrack{" + + "source=" + source + + '}'; + } +} |