TSHeader Class Reference

Used to access header of a TSPacket. More...

#include <libmythtv/mpeg/tspacket.h>

Inheritance diagram for TSHeader:

Collaboration diagram for TSHeader:

Public Types
using	Clock = std::chrono::steady_clock
using	TimePoint = std::chrono::time_point< Clock, std::chrono::microseconds >

Public Member Functions
	TSHeader (void)
	TSHeader (int cc)
void	InitHeader (const unsigned char *header)
bool	HasSync (void) const
bool	TransportError (void) const
bool	PayloadStart (void) const
bool	Priority (void) const
unsigned int	PID (void) const
unsigned int	ScramblingControl (void) const
unsigned int	AdaptationFieldControl (void) const
unsigned int	ContinuityCounter (void) const
bool	Scrambled (void) const
bool	HasAdaptationField (void) const
size_t	AdaptationFieldSize (void) const
bool	HasPayload (void) const
bool	GetDiscontinuityIndicator (void) const
bool	HasPCR (void) const
int64_t	GetPCRbase (void) const
int32_t	GetPCRext (void) const
int64_t	GetPCRraw (void) const
TimePoint	GetPCR (void) const
void	SetTransportError (bool err)
void	SetPayloadStart (bool start)
void	SetPriority (bool priority)
void	SetPID (unsigned int pid)
void	SetScrambled (unsigned int scr)
void	SetAdaptationFieldControl (unsigned int afc)
void	SetContinuityCounter (unsigned int cc)
const unsigned char *	data (void) const
unsigned char *	data (void)

Static Public Attributes
static constexpr unsigned int	kHeaderSize {4}
static const TSHeaderArray	kPayloadOnlyHeader

Private Attributes
TSHeaderArray	m_tsData

Detailed Description

Used to access header of a TSPacket.

This class is also used to determine which PID a PESPacket arrived on.

Warning

Be very, very careful when modifying this data structure. This class is used in the core of the received video data path, and for performance reasons overlaid on the buffer of bytes received from the network. It therefore can only contain (per-instance) variables that directly correspond to the data bytes received from the broadcaster. There may be static variables in this class, but absolutely no per-instance variables that are not part of the overlaid byte stream. There also must not be any virtual functions in this class, as the vtable is implemented as a per-instance variable in the class structure, and would mess up the overlaying of this structure on the received byte stream.

See also

TSPacket, PESPacket, HDTVRecorder

Definition at line 44 of file tspacket.h.

Member Typedef Documentation

Clock

using TSHeader::Clock = std::chrono::steady_clock

Definition at line 47 of file tspacket.h.

TimePoint

using TSHeader::TimePoint = std::chrono::time_point<Clock, std::chrono::microseconds>

Definition at line 48 of file tspacket.h.

Constructor & Destructor Documentation

TSHeader() [1/2]

TSHeader::TSHeader ( void  )

inline

Definition at line 50 of file tspacket.h.

TSHeader() [2/2]

TSHeader::TSHeader ( int  cc )

inlineexplicit

Definition at line 58 of file tspacket.h.

Member Function Documentation

InitHeader()

void TSHeader::InitHeader ( const unsigned char *  header )

inline

Definition at line 67 of file tspacket.h.

HasSync()

bool TSHeader::HasSync ( void  ) const

inline

Definition at line 81 of file tspacket.h.

Referenced by TSPacket::toString().

TransportError()

bool TSHeader::TransportError ( void  ) const

inline

Definition at line 84 of file tspacket.h.

Referenced by FirewireDevice::ProcessPATPacket(), TSStreamData::ProcessTSPacket(), FirewireRecorder::ProcessTSPacket(), MPEGStreamData::ProcessTSPacket(), and TSPacket::toString().

PayloadStart()

bool TSHeader::PayloadStart ( void  ) const

inline

Definition at line 87 of file tspacket.h.

Referenced by PESPacket::AddTSPacket(), MPEGStreamData::AssemblePSIP(), DTVRecorder::FindH2645Keyframes(), DTVRecorder::FindMPEG2Keyframes(), PSIPTable::InitPESPacket(), DTVRecorder::ProcessAudioTSPacket(), FirewireDevice::ProcessPATPacket(), PTSListener::ProcessTSPacket(), DTVRecorder::ProcessVideoTSPacket(), and TSPacket::toString().

Priority()

bool TSHeader::Priority ( void  ) const

inline

Definition at line 89 of file tspacket.h.

Referenced by TSPacket::toString().

PID()

unsigned int TSHeader::PID ( void  ) const

inline

Definition at line 91 of file tspacket.h.

Referenced by PESPacket::AddTSPacket(), MPEGStreamData::AssemblePSIP(), ATSCStreamData::DeleteCachedTable(), PESPacket::GetAsTSPackets(), MPEGStreamData::HandleTSTables(), DTVRecorder::ProcessAVTSPacket(), MPEGStreamData::ProcessEncryptedPacket(), FirewireDevice::ProcessPATPacket(), TSStreamData::ProcessTSPacket(), MpegRecorder::ProcessTSPacket(), FirewireRecorder::ProcessTSPacket(), DTVRecorder::ProcessTSPacket(), MPEGStreamData::ProcessTSPacket(), DTVRecorder::ProcessVideoTSPacket(), return_4096_block(), and TSPacket::toString().

ScramblingControl()

unsigned int TSHeader::ScramblingControl ( void  ) const

inline

Definition at line 95 of file tspacket.h.

Referenced by TSPacket::toString().

AdaptationFieldControl()

unsigned int TSHeader::AdaptationFieldControl ( void  ) const

inline

Definition at line 101 of file tspacket.h.

Referenced by PESPacket::AddTSPacket(), MPEGStreamData::ProcessTSPacket(), and TSPacket::toString().

ContinuityCounter()

unsigned int TSHeader::ContinuityCounter ( void  ) const

inline

Definition at line 107 of file tspacket.h.

Referenced by PESPacket::AddTSPacket(), MPEGStreamData::CreatePATSingleProgram(), MPEGStreamData::CreatePMTSingleProgram(), DTVRecorder::HandleSingleProgramPAT(), DTVRecorder::HandleSingleProgramPMT(), DTVRecorder::ProcessAVTSPacket(), DTVRecorder::ProcessTSPacket(), PSIPTable::PSIPTable(), and TSPacket::toString().

Scrambled()

bool TSHeader::Scrambled ( void  ) const

inline

Definition at line 110 of file tspacket.h.

Referenced by MPEGStreamData::HandleTSTables(), MPEGStreamData::ProcessEncryptedPacket(), FirewireDevice::ProcessPATPacket(), TSStreamData::ProcessTSPacket(), FirewireRecorder::ProcessTSPacket(), and MPEGStreamData::ProcessTSPacket().

HasAdaptationField()

bool TSHeader::HasAdaptationField ( void  ) const

inline

Definition at line 111 of file tspacket.h.

Referenced by PESPacket::AddTSPacket(), TSPacket::AFCOffset(), FirewireRecorder::ProcessTSPacket(), and MPEGStreamData::ProcessTSPacket().

AdaptationFieldSize()

size_t TSHeader::AdaptationFieldSize ( void  ) const

inline

Definition at line 112 of file tspacket.h.

Referenced by PESPacket::AddTSPacket(), and MPEGStreamData::ProcessTSPacket().

HasPayload()

bool TSHeader::HasPayload ( void  ) const

inline

Definition at line 114 of file tspacket.h.

Referenced by DTVRecorder::FindH2645Keyframes(), DTVRecorder::FindMPEG2Keyframes(), DTVRecorder::ProcessAudioTSPacket(), FirewireDevice::ProcessPATPacket(), FirewireRecorder::ProcessTSPacket(), MPEGStreamData::ProcessTSPacket(), and DTVRecorder::ProcessVideoTSPacket().

GetDiscontinuityIndicator()

bool TSHeader::GetDiscontinuityIndicator ( void  ) const

inline

Definition at line 116 of file tspacket.h.

HasPCR()

bool TSHeader::HasPCR ( void  ) const

inline

Definition at line 119 of file tspacket.h.

Referenced by MPEGStreamData::ProcessTSPacket().

GetPCRbase()

int64_t TSHeader::GetPCRbase ( void  ) const

inline

Definition at line 129 of file tspacket.h.

GetPCRext()

int32_t TSHeader::GetPCRext ( void  ) const

inline

Definition at line 137 of file tspacket.h.

GetPCRraw()

int64_t TSHeader::GetPCRraw ( void  ) const

inline

Definition at line 142 of file tspacket.h.

GetPCR()

TimePoint TSHeader::GetPCR ( void  ) const

inline

Definition at line 146 of file tspacket.h.

Referenced by MPEGStreamData::ProcessTSPacket().

SetTransportError()

void TSHeader::SetTransportError ( bool  err )

inline

Definition at line 149 of file tspacket.h.

SetPayloadStart()

void TSHeader::SetPayloadStart ( bool  start )

inline

Definition at line 152 of file tspacket.h.

SetPriority()

void TSHeader::SetPriority ( bool  priority )

inline

Definition at line 155 of file tspacket.h.

SetPID()

void TSHeader::SetPID ( unsigned int  pid )

inline

Definition at line 158 of file tspacket.h.

Referenced by ProgramMapTable::Create(), and PESPacket::GetAsTSPackets().

SetScrambled()

void TSHeader::SetScrambled ( unsigned int  scr )

inline

Definition at line 162 of file tspacket.h.

SetAdaptationFieldControl()

void TSHeader::SetAdaptationFieldControl ( unsigned int  afc )

inline

Definition at line 165 of file tspacket.h.

SetContinuityCounter()

void TSHeader::SetContinuityCounter ( unsigned int  cc )

inline

Definition at line 168 of file tspacket.h.

Referenced by MPEGStreamData::CreatePATSingleProgram(), MPEGStreamData::CreatePMTSingleProgram(), PESPacket::GetAsTSPackets(), DTVRecorder::HandleSingleProgramPAT(), DTVRecorder::HandleSingleProgramPMT(), and MpegRecorder::ProcessTSPacket().

data() [1/2]

const unsigned char* TSHeader::data ( void  ) const

inline

Definition at line 172 of file tspacket.h.

Referenced by PESPacket::AddTSPacket(), MPEGStreamData::AssemblePSIP(), DTVRecorder::BufferedWrite(), ProgramAssociationTable::CreateBlank(), ProgramMapTable::CreateBlank(), DTVRecorder::FindH2645Keyframes(), DTVRecorder::FindMPEG2Keyframes(), PESPacket::GetAsTSPackets(), PSIPTable::InitPESPacket(), PTSListener::ProcessTSPacket(), PSIPTable::PSIPTable(), and TSPacket::toString().

data() [2/2]

unsigned char* TSHeader::data ( void  )

inline

Definition at line 173 of file tspacket.h.

Member Data Documentation

kHeaderSize

constexpr unsigned int TSHeader::kHeaderSize {4}

staticconstexpr

Definition at line 175 of file tspacket.h.

Referenced by PESPacket::AddTSPacket().

kPayloadOnlyHeader

const TSHeaderArray TSHeader::kPayloadOnlyHeader

static

Initial value:

{
    SYNC_BYTE,
    0x40, 
    0x0,
    0x10,  
}

Definition at line 176 of file tspacket.h.

m_tsData

TSHeaderArray TSHeader::m_tsData

private

Definition at line 178 of file tspacket.h.

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

• mythtv/libs/libmythtv/mpeg/tspacket.h
• mythtv/libs/libmythtv/mpeg/tspacket.cpp