FMLiveSwitchH265Nalu Class Reference

An H265 Network Abstraction Layer Unit. More...

Instance Methods
(FMLiveSwitchDataBuffer *)	- buffer
	Gets the backing DataBuffer. More...
(bool)	- fBit
	Gets the forbidden Zero Bit. More...
(FMLiveSwitchDataBuffer *)	- getBytes
	Gets the NAL Unit as a byte array that can be passed to an encoder (includes Start Code). More...
(instancetype)	- init
	Creates an empty NAL Unit. More...
(instancetype)	- initWithNaluBytes:
	Creates a NAL Unit from a byte array. More...
(int)	- layerId
	Gets the LayerId: 6bits otherwise known as nuh_layer_id. More...
(FMLiveSwitchDataBuffer *)	- payload
	Gets the NAL payload. More...
(FMLiveSwitchDataBuffer *)	- shortLength
	Gets the size of the NAL Unit (including NAL header) in two octets stored in the returned byte array. More...
(int)	- tid
	Gets the TID: 3bits otherwise known as nuh_temporal_plus1. More...
(int)	- type
	Gets the NAL Unit Type. More...

Class Methods
(int)	+ fBitMask
	Gets the forbidden zero bit mask. More...
(int)	+ findNaluWithEncodedData:
	Scans for the index of the first NAL Unit after start. More...
(int)	+ findNextNaluWithEncodedData:start:
	Scans for the index of the first NAL Unit after start. More...
(FMLiveSwitchH265Nalu *)	+ getNaluWithEncodedData:
	Returns the first NAL unit after nalStart. More...
(FMLiveSwitchH265Nalu *)	+ getNaluWithEncodedData:nalStart:nextStartCodeLength:
	Returns the first NAL unit after nalStart. More...
(int)	+ layerIdMask
	Gets the Layer Id (nuh_layer_id) mask. More...
(FMLiveSwitchH265Nalu *)	+ nalu
	Creates an empty NAL Unit. More...
(FMLiveSwitchH265Nalu *)	+ naluWithNaluBytes:
	Creates a NAL Unit from a byte array. More...
(FMLiveSwitchDataBuffer *)	+ startCode
	Gets the 4-byte NALU start code. More...
(int)	+ tidMask
	Gets the TID (nuh_temporal_id_plus1) mask. More...
(int)	+ typeMask
	Gets the NAL Unit Type (nal_unit_type) mask. More...

Detailed Description

An H265 Network Abstraction Layer Unit.

Method Documentation

buffer

- (FMLiveSwitchDataBuffer*) buffer

Gets the backing DataBuffer.

fBit

- (bool) fBit

Gets the forbidden Zero Bit.

The H.265 specification declares a value of 1 as a syntax violation.

fBitMask

+ (int) fBitMask

Gets the forbidden zero bit mask.

findNaluWithEncodedData:

+ (int) findNaluWithEncodedData:

(FMLiveSwitchDataBuffer *)

encodedData

Scans for the index of the first NAL Unit after start.

Parameters

encodedData

The stream to search.

findNextNaluWithEncodedData:start:

+ (int) findNextNaluWithEncodedData:		(FMLiveSwitchDataBuffer *)	encodedData
start:		(int)	start

Scans for the index of the first NAL Unit after start.

Parameters

encodedData	The stream to search.
start	The index to start searching from.

getBytes

- (FMLiveSwitchDataBuffer*) getBytes

Gets the NAL Unit as a byte array that can be passed to an encoder (includes Start Code).

getNaluWithEncodedData:

+ (FMLiveSwitchH265Nalu*) getNaluWithEncodedData:

(FMLiveSwitchDataBuffer *)

encodedData

Returns the first NAL unit after nalStart.

Parameters

encodedData

The byte array to search.

getNaluWithEncodedData:nalStart:nextStartCodeLength:

+ (FMLiveSwitchH265Nalu*) getNaluWithEncodedData:		(FMLiveSwitchDataBuffer *)	encodedData
nalStart:		(int)	nalStart
nextStartCodeLength:		(int *)	nextStartCodeLength

Returns the first NAL unit after nalStart.

Parameters

encodedData	The byte array to search.
nalStart	The start index of the NAL.
nextStartCodeLength	OUT The length of the next the NAL startcode.

init

- (instancetype) init

Creates an empty NAL Unit.

initWithNaluBytes:

- (instancetype) initWithNaluBytes:

(FMLiveSwitchDataBuffer *)

naluBytes

Creates a NAL Unit from a byte array.

Parameters

naluBytes

The NALU bytes.

layerId

- (int) layerId

Gets the LayerId: 6bits otherwise known as nuh_layer_id.

layerIdMask

+ (int) layerIdMask

Gets the Layer Id (nuh_layer_id) mask.

nalu

+ (FMLiveSwitchH265Nalu*) nalu

Creates an empty NAL Unit.

naluWithNaluBytes:

+ (FMLiveSwitchH265Nalu*) naluWithNaluBytes:

(FMLiveSwitchDataBuffer *)

naluBytes

Creates a NAL Unit from a byte array.

Parameters

naluBytes

The NALU bytes.

payload

- (FMLiveSwitchDataBuffer*) payload

Gets the NAL payload.

shortLength

- (FMLiveSwitchDataBuffer*) shortLength

Gets the size of the NAL Unit (including NAL header) in two octets stored in the returned byte array.

Useful for creating H265 aggregation packets.

startCode

+ (FMLiveSwitchDataBuffer*) startCode

Gets the 4-byte NALU start code.

tid

- (int) tid

Gets the TID: 3bits otherwise known as nuh_temporal_plus1.

tidMask

+ (int) tidMask

Gets the TID (nuh_temporal_id_plus1) mask.

type

- (int) type

Gets the NAL Unit Type.

typeMask

+ (int) typeMask

Gets the NAL Unit Type (nal_unit_type) mask.