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/*
* Copyright 2002-2017 Drew Noakes
*
* 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.
*
* More information about this project is available at:
*
* https://drewnoakes.com/code/exif/
* https://github.com/drewnoakes/metadata-extractor
*/
package com.drew.metadata.mp4.boxes;
import com.drew.lang.SequentialReader;
import com.drew.metadata.mp4.Mp4HandlerFactory;
import com.drew.metadata.mp4.media.Mp4SoundDirectory;
import com.drew.metadata.mp4.media.Mp4VideoDirectory;
import java.io.IOException;
import java.util.ArrayList;
/**
* ISO/IED 14496-12:2015 pg.37
*/
public class TimeToSampleBox extends FullBox
{
long entryCount;
ArrayList<EntryCount> entries;
public TimeToSampleBox(SequentialReader reader, Box box) throws IOException
{
super(reader, box);
entryCount = reader.getUInt32();
entries = new ArrayList<EntryCount>();
for (int i = 0; i < entryCount; i++) {
entries.add(new EntryCount(reader.getUInt32(), reader.getUInt32()));
}
}
public void addMetadata(Mp4VideoDirectory directory)
{
float frameRate = (float) Mp4HandlerFactory.HANDLER_PARAM_TIME_SCALE/(float)entries.get(0).sampleDelta;
directory.setFloat(Mp4VideoDirectory.TAG_FRAME_RATE, frameRate);
}
public void addMetadata(Mp4SoundDirectory directory)
{
directory.setDouble(Mp4SoundDirectory.TAG_AUDIO_SAMPLE_RATE, Mp4HandlerFactory.HANDLER_PARAM_TIME_SCALE);
}
class EntryCount
{
long sampleCount;
long sampleDelta;
public EntryCount(long sampleCount, long sampleDelta)
{
this.sampleCount = sampleCount;
this.sampleDelta = sampleDelta;
}
}
}
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