Maven module :un.storage : media-mpeg4 :
Class : un.storage.media.mp4.boxes.impl.SampleToGroupBox
Extends/Implements : un.storage.media.mp4.boxes.FullBox
Subclasses : -

This table can be used to find the group that a sample belongs to and the
associated description of that sample group. The table is compactly coded
with each entry giving the index of the first sample of a run of samples with
the same sample group descriptor. The sample group description ID is an index
that refers to a SampleGroupDescription box, which contains entries
describing the characteristics of each sample group.
There may be multiple instances of this box if there is more than one sample
grouping for the samples in a track. Each instance of the SampleToGroup box
has a type code that distinguishes different sample groupings. Within a
track, there shall be at most one instance of this box with a particular
grouping type. The associated SampleGroupDescription shall indicate the same
value for the grouping type.
author  Alexander Simm

Variables : -
Functions : SampleToGroupBox, decode, getGroupingType, getSampleCount, getGroupDescriptionIndex

public void SampleToGroupBox ()

public void decode (MP4InputStream in)


The grouping type is an integer that identifies the type (i.e. criterion
used to form the sample groups) of the sample grouping and links it to
its sample group description table with the same value for grouping type.
At most one occurrence of this box with the same value for 'grouping
type' shall exist for a track.
public long getGroupingType ()


The sample count is an integer that gives the number of consecutive
samples with the same sample group descriptor for a specific entry. If
the sum of the sample count in this box is less than the total sample
count, then the reader should effectively extend it with an entry that
associates the remaining samples with no group.
It is an error for the total in this box to be greater than the sample
count documented elsewhere, and the reader behaviour would then be
undefined.
public long[] getSampleCount ()


The group description index is an integer that gives the index of the
sample group entry which describes the samples in this group for a
specific entry. The index ranges from 1 to the number of sample group
entries in the SampleGroupDescriptionBox, or takes the value 0 to
indicate that this sample is a member of no group of this type.
public long[] getGroupDescriptionIndex ()