org.mp4parser.boxes.iso14496.part12

Class CompositionTimeToSample

java.lang.Object

org.mp4parser.support.AbstractBox

org.mp4parser.support.AbstractFullBox

org.mp4parser.boxes.iso14496.part12.CompositionTimeToSample

All Implemented Interfaces:

Box, FullBox, ParsableBox

public class CompositionTimeToSample
extends AbstractFullBox

4cc = ""ctts""

 aligned(8) class CompositionOffsetBox extends FullBox(‘ctts’, version = 0, 0) {
  unsigned int(32) entry_count;
  int i;
  if (version==0) {
   for (i=0; i < entry_count; i++) {
    unsigned int(32) sample_count;
    unsigned int(32) sample_offset;
   }
  }
  else if (version == 1) {
   for (i=0; i < entry_count; i++) {
    unsigned int(32) sample_count;
    signed int(32) sample_offset;
   }
  }
 }
 

This box provides the offset between decoding time and composition time. In version 0 of this box the decoding time must be less than the composition time, and the offsets are expressed as unsigned numbers such that

CT(n) = DT(n) + CTTS(n) where CTTS(n) is the (uncompressed) table entry for sample n.

In version 1 of this box, the composition timeline and the decoding timeline are still derived from each other, but the offsets are signed. It is recommended that for the computed composition timestamps, there is exactly one with the value 0 (zero).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CompositionTimeToSample.Entry

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	TYPE

Fields inherited from class org.mp4parser.support.AbstractBox

content, type

Constructor Summary

Constructors

Constructor and Description
CompositionTimeToSample()

Method Summary

Modifier and Type	Method and Description
void	_parseDetails(java.nio.ByteBuffer content) Parse the box's fields and child boxes if any.
static int[]	blowupCompositionTimes(java.util.List<CompositionTimeToSample.Entry> entries) Decompresses the list of entries and returns the list of composition times.
protected void	getContent(java.nio.ByteBuffer byteBuffer) Write the box's content into the given ByteBuffer.
protected long	getContentSize() Get the box's content size without its header.
java.util.List<CompositionTimeToSample.Entry>	getEntries()
void	setEntries(java.util.List<CompositionTimeToSample.Entry> entries)

Methods inherited from class org.mp4parser.support.AbstractFullBox

getFlags, getVersion, parseVersionAndFlags, setFlags, setVersion, writeVersionAndFlags

Methods inherited from class org.mp4parser.support.AbstractBox

getBox, getSize, getType, getUserType, isParsed, parse, parseDetails

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.mp4parser.ParsableBox

parse

Methods inherited from interface org.mp4parser.Box

getBox, getSize, getType

Field Detail

TYPE

public static final java.lang.String TYPE

See Also:

Constant Field Values

Constructor Detail

CompositionTimeToSample

public CompositionTimeToSample()

Method Detail

blowupCompositionTimes

public static int[] blowupCompositionTimes(java.util.List<CompositionTimeToSample.Entry> entries)

Decompresses the list of entries and returns the list of composition times.

Parameters:

entries - composition time to sample entries in compressed form

Returns:

decoding time per sample

getContentSize

protected long getContentSize()

Description copied from class: AbstractBox

Get the box's content size without its header. This must be the exact number of bytes that getContent(ByteBuffer) writes.

Specified by:

getContentSize in class AbstractBox

Returns:

Gets the box's content size in bytes

See Also:

AbstractBox.getContent(java.nio.ByteBuffer)

getEntries

public java.util.List<CompositionTimeToSample.Entry> getEntries()

setEntries

public void setEntries(java.util.List<CompositionTimeToSample.Entry> entries)

_parseDetails

public void _parseDetails(java.nio.ByteBuffer content)

Description copied from class: AbstractBox

Parse the box's fields and child boxes if any.

Specified by:

_parseDetails in class AbstractBox

Parameters:

content - the box's raw content beginning after the 4-cc field.

getContent

protected void getContent(java.nio.ByteBuffer byteBuffer)

Description copied from class: AbstractBox

Write the box's content into the given ByteBuffer. This must include flags and version in case of a full box. byteBuffer has been initialized with getSize() bytes.

Specified by:

getContent in class AbstractBox

Parameters:

byteBuffer - the sink for the box's content