Module h264 

H.264 payload format (RFC 6184): STAP-A aggregation and FU-A fragmentation. H.264 RTP payload format (RFC 6184).

A NAL unit that fits the MTU is sent as-is. Larger ones are split into FU-A fragments, and several small ones (typically SPS and PPS) may be combined into one STAP-A aggregate. The *_NALU_TYPE constants name the types this payloader recognises, and the *_BITMASK constants describe how the NAL header and FU header pack their fields.

Structs

H264Packet

H264Packet represents the H264 header that is stored in the payload of an RTP Packet

H264Payloader

H264Payloader payloads H264 packets

Constants

AUD_NALU_TYPE

NAL type 9: access unit delimiter.

FILLER_NALU_TYPE

NAL type 12: filler data, which is dropped rather than sent.

FUA_HEADER_SIZE

Bytes of FU-A header prefixed to each fragment.

FUA_NALU_TYPE

NAL type 28: FU-A, which fragments one NAL unit across several payloads.

FUB_NALU_TYPE

NAL type 29: FU-B, FU-A with a decoding-order number. Not used by WebRTC.

FU_END_BITMASK

FU header end bit: this fragment completes a NAL unit.

FU_START_BITMASK

FU header start bit: this fragment begins a NAL unit.

NALU_REF_IDC_BITMASK

Mask selecting nal_ref_idc from a NAL header byte.

NALU_TYPE_BITMASK

Mask selecting the NAL type from a NAL header byte.

OUTPUT_STAP_AHEADER

The STAP-A header byte this payloader emits.

PPS_NALU_TYPE

NAL type 8: picture parameter set.

SPS_NALU_TYPE

NAL type 7: sequence parameter set.

STAPA_HEADER_SIZE

Bytes of STAP-A header prefixed to an aggregate.

STAPA_NALU_LENGTH_SIZE

Bytes of length prefix before each NAL unit inside a STAP-A.

STAPA_NALU_TYPE

NAL type 24: STAP-A, which aggregates several small NAL units into one payload.

Statics

ANNEXB_NALUSTART_CODE

The Annex B start code (00 00 00 01) that delimits NAL units in a byte stream.