File Doc Category Size Date Package
TrackHeaderBox.java API Doc mp4parser 1.0-RC-17 8965 Wed Dec 19 20:10:38 GMT 2012 com.coremedia.iso.boxes

TrackHeaderBox

java.lang.Object
- com.googlecode.mp4parser.AbstractFullBox

public class TrackHeaderBox extends com.googlecode.mp4parser.AbstractFullBox

This box specifies the characteristics of a single track. Exactly one Track Header Box is contained in a track.
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.
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.

Fields Summary
public static final String
TYPE
private long
creationTime
private long
modificationTime
private long
trackId
private long
duration
private int
layer
private int
alternateGroup
private float
volume
private double[]
matrix
private double
width
private double
height
Constructors Summary
public TrackHeaderBox()
super(TYPE);
Methods Summary
public void _parseDetails(java.nio.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 double[9]; int i = 0; matrix[i++] = IsoTypeReader.readFixedPoint1616(content); matrix[i++] = IsoTypeReader.readFixedPoint1616(content); matrix[i++] = IsoTypeReader.readFixedPoint0230(content); matrix[i++] = IsoTypeReader.readFixedPoint1616(content); matrix[i++] = IsoTypeReader.readFixedPoint1616(content); matrix[i++] = IsoTypeReader.readFixedPoint0230(content); matrix[i++] = IsoTypeReader.readFixedPoint1616(content); matrix[i++] = IsoTypeReader.readFixedPoint1616(content); matrix[i] = IsoTypeReader.readFixedPoint0230(content); width = IsoTypeReader.readFixedPoint1616(content); // 248 height = IsoTypeReader.readFixedPoint1616(content);
public int getAlternateGroup()
return alternateGroup;
public void getContent(java.nio.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.writeFixedPoint88(byteBuffer, volume); IsoTypeWriter.writeUInt16(byteBuffer, 0); int i = 0; IsoTypeWriter.writeFixedPoint1616(byteBuffer, matrix[i++]); IsoTypeWriter.writeFixedPoint1616(byteBuffer, matrix[i++]); IsoTypeWriter.writeFixedPoint0230(byteBuffer, matrix[i++]); IsoTypeWriter.writeFixedPoint1616(byteBuffer, matrix[i++]); IsoTypeWriter.writeFixedPoint1616(byteBuffer, matrix[i++]); IsoTypeWriter.writeFixedPoint0230(byteBuffer, matrix[i++]); IsoTypeWriter.writeFixedPoint1616(byteBuffer, matrix[i++]); IsoTypeWriter.writeFixedPoint1616(byteBuffer, matrix[i++]); IsoTypeWriter.writeFixedPoint0230(byteBuffer, matrix[i]); IsoTypeWriter.writeFixedPoint1616(byteBuffer, width); IsoTypeWriter.writeFixedPoint1616(byteBuffer, height);
protected long getContentSize()
long contentSize = 4; if (getVersion() == 1) { contentSize += 32; } else { contentSize += 20; } contentSize += 60; return contentSize;
public long getCreationTime()
return creationTime;
public long getDuration()
return duration;
public double getHeight()
return height;
public int getLayer()
return layer;
public double[] getMatrix()
return matrix;
public long getModificationTime()
return modificationTime;
public long getTrackId()
return trackId;
public float getVolume()
return volume;
public double getWidth()
return width;
public boolean isEnabled()
return (getFlags() & 1) > 0;
public boolean isInMovie()
return (getFlags() & 2) > 0;
public boolean isInPoster()
return (getFlags() & 8) > 0;
public boolean isInPreview()
return (getFlags() & 4) > 0;
public void setAlternateGroup(int alternateGroup)
this.alternateGroup = alternateGroup;
public void setCreationTime(long creationTime)
this.creationTime = creationTime;
public void setDuration(long duration)
this.duration = duration;
public void setHeight(double height)
this.height = height;
public void setLayer(int layer)
this.layer = layer;
public void setMatrix(double[] matrix)
this.matrix = matrix;
public void setModificationTime(long modificationTime)
this.modificationTime = modificationTime;
public void setTrackId(long trackId)
this.trackId = trackId;
public void setVolume(float volume)
this.volume = volume;
public void setWidth(double width)
this.width = width;
public java.lang.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();