CH264AVCCBitstreamParser Class Reference

H.264 AVCC format closed caption parser. More...

#include <H264AVCCBitstreamParser.h>

Inheritance diagram for CH264AVCCBitstreamParser:

Public Member Functions
	CH264AVCCBitstreamParser ()=default
	~CH264AVCCBitstreamParser () override=default
CCPictureType	ParsePacket (DemuxPacket *pPacket, std::vector< CCaptionBlock > &tempBuffer, std::vector< CCaptionBlock > &reorderBuffer) override
	Parse AVCC packet for closed caption data.
const char *	GetName () const override
	Get parser name for debugging/logging.
Public Member Functions inherited from ICCBitstreamParser
virtual	~ICCBitstreamParser ()=default

Additional Inherited Members
Protected Member Functions inherited from CH264CCBitstreamParser
void	ProcessSEIPayload (std::span< const uint8_t > buf, double pts, std::vector< CCaptionBlock > &tempBuffer)
	Process SEI payload containing closed caption data.
CCPictureType	DetectSliceType (std::span< const uint8_t > buf)
	Detect slice type from H.264 slice header.

Detailed Description

H.264 AVCC format closed caption parser.

Parses H.264 streams in AVCC (AVC1) format used by MP4/MKV containers. AVCC uses length-prefixed NAL units:

• 4-byte big-endian length prefix
• NAL unit data (length bytes)
• Repeat for each NAL unit

Extracts CC data from SEI NAL units (type 6) with payload type 4.

Constructor & Destructor Documentation

CH264AVCCBitstreamParser()

CH264AVCCBitstreamParser::CH264AVCCBitstreamParser ( )

default

~CH264AVCCBitstreamParser()

CH264AVCCBitstreamParser::~CH264AVCCBitstreamParser ( )

overridedefault

Member Function Documentation

GetName()

const char * CH264AVCCBitstreamParser::GetName ( ) const

inlineoverridevirtual

Get parser name for debugging/logging.

Returns

Human-readable parser name

Implements ICCBitstreamParser.

ParsePacket()

CCPictureType CH264AVCCBitstreamParser::ParsePacket ( DemuxPacket * pPacket, std::vector< CCaptionBlock > & tempBuffer, std::vector< CCaptionBlock > & reorderBuffer )

overridevirtual

Parse AVCC packet for closed caption data.

Iterates through length-prefixed NAL units, extracting CC data from SEI payloads and detecting picture type from slice headers.

Parameters

pPacket	H.264 video packet in AVCC format
tempBuffer	Temporary buffer for CC data from reference frames
reorderBuffer	Reorder buffer for CC data

Returns

Picture type (I_FRAME, P_FRAME, or OTHER)

Implements ICCBitstreamParser.

---

The documentation for this class was generated from the following files:

• H264AVCCBitstreamParser.h
• H264AVCCBitstreamParser.cpp