Module h265 

H.265/HEVC payload format (RFC 7798). H.265/HEVC RTP payload format (RFC 7798).

HEVC differs from H.264 in ways that matter to packetization: NAL headers are two bytes rather than one, and there is an extra aggregation form (PACI) that can carry payload content information ahead of the NAL unit.

This module provides the three packet shapes the RFC defines — single NAL unit, aggregation, and fragmentation unit — plus HevcPayloader, which picks between them based on the MTU, and the depacketizer that reverses the choice.

Structs

H265AggregationPacket

H265AggregationPacket represents an Aggregation packet. 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | PayloadHdr (Type=48) | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | | | two or more aggregation units | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | :…OPTIONAL RTP padding | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

H265AggregationUnit

H265AggregationUnit represent the an Aggregation Unit in an AP, which is not the first one.

H265AggregationUnitFirst

Aggregation Packets implementation

H265FragmentationUnitHeader

Fragmentation Unit implementation

H265FragmentationUnitPacket

H265FragmentationUnitPacket represents a single Fragmentation Unit packet.

H265NALUHeader

H265NALUHeader is a H265 NAL Unit Header

H265PACIPacket

PACI implementation

H265Packet

Packet implementation

H265SingleNALUnitPacket

Single NAL Unit Packet implementation

H265TSCI

Temporal Scalability Control Information

HevcPayloader

Packetizes H.265/HEVC NAL units into RTP payloads, fragmenting when needed.

Enums

H265Payload

H265 Payload Enum

UnitType

The H.265 NAL unit types this payloader distinguishes.

Constants

H265FRAGMENTATION_UNIT_HEADER_SIZE

Bytes of FU header following the payload header in a fragmentation unit.

NAL_HEADER_SIZE

Bytes in an H.265 NAL header — two, unlike H.264’s one.

RTP_OUTBOUND_MTU

The payload MTU this payloader targets, chosen to survive typical paths without IP fragmentation.

Statics

AGGR_PAYLOAD_HDR

Payload header for an aggregation packet.

ANNEXB_3_NALUSTART_CODE

The three-byte Annex B start code (00 00 01).

FRAG_PAYLOAD_HDR

Payload header for a fragmentation unit.

FU_HDR_B_E

FU header for the last fragment of a B frame.

FU_HDR_B_M

FU header for a middle fragment of a B frame.

FU_HDR_B_S

FU header for the first fragment of a B frame.

FU_HDR_IDR_E

FU header for the last fragment of an IDR frame.

FU_HDR_IDR_M

FU header for a middle fragment of an IDR frame.

FU_HDR_IDR_S

FU header for the first fragment of an IDR frame.

FU_HDR_P_E

FU header for the last fragment of a P frame.

FU_HDR_P_M

FU header for a middle fragment of a P frame.

FU_HDR_P_S

FU header for the first fragment of a P frame.

SING_PAYLOAD_HDR

Payload header for a single NAL unit packet.