/*
* Copyright 2008 CoreMedia AG, 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.coremedia.iso.boxes;
import com.coremedia.iso.IsoTypeReader;
import com.coremedia.iso.IsoTypeWriter;
import com.googlecode.mp4parser.AbstractFullBox;
import java.nio.ByteBuffer;
/**
* This box specifies the characteristics of a single track. Exactly one Track Header Box is contained in a track.<br>
* In the absence of an edit list, the presentation of a track starts at the beginning of the overall presentation. An
* empty edit is used to offset the start time of a track. <br>
* The default value of the track header flags for media tracks is 7 (track_enabled, track_in_movie,
* track_in_preview). If in a presentation all tracks have neither track_in_movie nor track_in_preview set, then all
* tracks shall be treated as if both flags were set on all tracks. Hint tracks should have the track header flags set
* to 0, so that they are ignored for local playback and preview.
*/
public class TrackHeaderBox extends AbstractFullBox {
public static final String TYPE = "tkhd";
private long creationTime;
private long modificationTime;
private long trackId;
private long duration;
private int layer;
private int alternateGroup;
private float volume;
private long[] matrix = new long[]{0x00010000, 0, 0, 0, 0x00010000, 0, 0, 0, 0x40000000};
private double width;
private double height;
public TrackHeaderBox() {
super(TYPE);
}
public long getCreationTime() {
return creationTime;
}
public long getModificationTime() {
return modificationTime;
}
public long getTrackId() {
return trackId;
}
public long getDuration() {
return duration;
}
public int getLayer() {
return layer;
}
public int getAlternateGroup() {
return alternateGroup;
}
public float getVolume() {
return volume;
}
public long[] getMatrix() {
return matrix;
}
public double getWidth() {
return width;
}
public double getHeight() {
return height;
}
protected long getContentSize() {
long contentSize = 4;
if (getVersion() == 1) {
contentSize += 32;
} else {
contentSize += 20;
}
contentSize += 60;
return contentSize;
}
@Override
public void _parseDetails(ByteBuffer content) {
parseVersionAndFlags(content);
if (getVersion() == 1) {
creationTime = IsoTypeReader.readUInt64(content);
modificationTime = IsoTypeReader.readUInt64(content);
trackId = IsoTypeReader.readUInt32(content);
IsoTypeReader.readUInt32(content);
duration = IsoTypeReader.readUInt64(content);
} else {
creationTime = IsoTypeReader.readUInt32(content);
modificationTime = IsoTypeReader.readUInt32(content);
trackId = IsoTypeReader.readUInt32(content);
IsoTypeReader.readUInt32(content);
duration = IsoTypeReader.readUInt32(content);
} // 196
IsoTypeReader.readUInt32(content);
IsoTypeReader.readUInt32(content);
layer = IsoTypeReader.readUInt16(content); // 204
alternateGroup = IsoTypeReader.readUInt16(content);
volume = IsoTypeReader.readFixedPoint88(content);
IsoTypeReader.readUInt16(content); // 212
matrix = new long[9];
for (int i = 0; i < 9; i++) {
matrix[i] = IsoTypeReader.readUInt32(content);
}
width = IsoTypeReader.readFixedPoint1616(content); // 248
height = IsoTypeReader.readFixedPoint1616(content);
}
public void getContent(ByteBuffer byteBuffer) {
writeVersionAndFlags(byteBuffer);
if (getVersion() == 1) {
IsoTypeWriter.writeUInt64(byteBuffer, creationTime);
IsoTypeWriter.writeUInt64(byteBuffer, modificationTime);
IsoTypeWriter.writeUInt32(byteBuffer, trackId);
IsoTypeWriter.writeUInt32(byteBuffer, 0);
IsoTypeWriter.writeUInt64(byteBuffer, duration);
} else {
IsoTypeWriter.writeUInt32(byteBuffer, creationTime);
IsoTypeWriter.writeUInt32(byteBuffer, modificationTime);
IsoTypeWriter.writeUInt32(byteBuffer, trackId);
IsoTypeWriter.writeUInt32(byteBuffer, 0);
IsoTypeWriter.writeUInt32(byteBuffer, duration);
} // 196
IsoTypeWriter.writeUInt32(byteBuffer, 0);
IsoTypeWriter.writeUInt32(byteBuffer, 0);
IsoTypeWriter.writeUInt16(byteBuffer, layer);
IsoTypeWriter.writeUInt16(byteBuffer, alternateGroup);
IsoTypeWriter.writeFixedPont88(byteBuffer, volume);
IsoTypeWriter.writeUInt16(byteBuffer, 0);
for (int i = 0; i < 9; i++) {
IsoTypeWriter.writeUInt32(byteBuffer, matrix[i]);
}
IsoTypeWriter.writeFixedPont1616(byteBuffer, width);
IsoTypeWriter.writeFixedPont1616(byteBuffer, height);
}
public String toString() {
StringBuilder result = new StringBuilder();
result.append("TrackHeaderBox[");
result.append("creationTime=").append(getCreationTime());
result.append(";");
result.append("modificationTime=").append(getModificationTime());
result.append(";");
result.append("trackId=").append(getTrackId());
result.append(";");
result.append("duration=").append(getDuration());
result.append(";");
result.append("layer=").append(getLayer());
result.append(";");
result.append("alternateGroup=").append(getAlternateGroup());
result.append(";");
result.append("volume=").append(getVolume());
for (int i = 0; i < matrix.length; i++) {
result.append(";");
result.append("matrix").append(i).append("=").append(matrix[i]);
}
result.append(";");
result.append("width=").append(getWidth());
result.append(";");
result.append("height=").append(getHeight());
result.append("]");
return result.toString();
}
public void setCreationTime(long creationTime) {
this.creationTime = creationTime;
}
public void setModificationTime(long modificationTime) {
this.modificationTime = modificationTime;
}
public void setTrackId(long trackId) {
this.trackId = trackId;
}
public void setDuration(long duration) {
this.duration = duration;
}
public void setLayer(int layer) {
this.layer = layer;
}
public void setAlternateGroup(int alternateGroup) {
this.alternateGroup = alternateGroup;
}
public void setVolume(float volume) {
this.volume = volume;
}
public void setMatrix(long[] matrix) {
this.matrix = matrix;
}
public void setWidth(double width) {
this.width = width;
}
public void setHeight(double height) {
this.height = height;
}
public boolean isEnabled() {
return (getFlags() & 1) > 0;
}
public boolean isInMovie() {
return (getFlags() & 2) > 0;
}
public boolean isInPreview() {
return (getFlags() & 4) > 0;
}
public boolean isInPoster() {
return (getFlags() & 8) > 0;
}
}