This class stores the specification of a layer distribution in the bit stream. The specification is made of optimization points and a number of extra layers to add between the optimization points. Each optimization point creates a layer which is optimized by the rate allocator to the specified target bitrate. The extra layers are added by the rate allocator between the optimized layers, with the difference that they are not optimized (i.e. they have no precise target bitrate).

The overall target bitrate for the bit stream is always added as the last optimization point without any extra layers after it. If there are some optimization points whose target bitrate is larger than the overall target bitrate, the overall target bitrate will still appear as the last optimization point, even though it does not follow the increasing target bitrate order of the other optimization points. The rate allocator is responsible for eliminating layers that have target bitrates larger than the overall target bitrate.

Optimization points can be added with the addOptPoint() method. It takes the target bitrate for the optimized layer and the number of extra layers to add after it.

Information about the total number of layers, total number of optimization points, target bitrates, etc. can be obtained with the other methods.

'Declaration
 
Public Class LayersInfo 

public class LayersInfo