PacketBuffer Class Reference

#include <libmythtv/recorders/rtp/packetbuffer.h>

Inheritance diagram for PacketBuffer:

Collaboration diagram for PacketBuffer:

Public Member Functions
	PacketBuffer (unsigned int bitrate)
virtual	~PacketBuffer ()=default
virtual void	PushDataPacket (const UDPPacket &)=0
virtual void	PushFECPacket (const UDPPacket &, unsigned int)=0
bool	HasAvailablePacket (void) const
	Returns true if there are ordered packets ready for processing. More...
UDPPacket	PopDataPacket (void)
	Fetches a data packet for processing. More...
UDPPacket	GetEmptyPacket (void)
	Gets a packet for use in PushDataPacket/PushFECPacket. More...
void	FreePacket (const UDPPacket &packet)
	Frees an RTPDataPacket returned by PopDataPacket. More...

Protected Attributes
uint	m_bitrate
uint64_t	m_next_empty_packet_key
	Packets key to use for next empty packet. More...
QMap< uint64_t, UDPPacket >	m_empty_packets
	Packets ready for reuse. More...
QList< UDPPacket >	m_available_packets
	Ordered list of available packets. More...

Detailed Description

Definition at line 15 of file packetbuffer.h.

Constructor & Destructor Documentation

PacketBuffer()

PacketBuffer::PacketBuffer ( unsigned int  bitrate )

explicit

Definition at line 13 of file packetbuffer.cpp.

~PacketBuffer()

virtual PacketBuffer::~PacketBuffer ( )

virtualdefault

Member Function Documentation

PushDataPacket()

virtual void PacketBuffer::PushDataPacket ( const UDPPacket &  )

pure virtual

Implemented in RTPPacketBuffer, and UDPPacketBuffer.

Referenced by IPTVStreamHandlerReadHelper::ReadPending().

PushFECPacket()

virtual void PacketBuffer::PushFECPacket ( const UDPPacket &  , unsigned int    )

pure virtual

Implemented in UDPPacketBuffer, and RTPPacketBuffer.

Referenced by IPTVStreamHandlerReadHelper::ReadPending().

HasAvailablePacket()

bool PacketBuffer::HasAvailablePacket

(

void

)

const

Returns true if there are ordered packets ready for processing.

Definition at line 19 of file packetbuffer.cpp.

Referenced by IPTVStreamHandlerWriteHelper::timerEvent().

PopDataPacket()

UDPPacket PacketBuffer::PopDataPacket

(

void

)

Fetches a data packet for processing.

Call FreePacket() when done with the packet.

Definition at line 24 of file packetbuffer.cpp.

Referenced by IPTVStreamHandlerWriteHelper::timerEvent().

GetEmptyPacket()

UDPPacket PacketBuffer::GetEmptyPacket

(

void

)

Gets a packet for use in PushDataPacket/PushFECPacket.

Definition at line 35 of file packetbuffer.cpp.

Referenced by IPTVStreamHandlerReadHelper::ReadPending().

FreePacket()

void PacketBuffer::FreePacket

(

const UDPPacket &

packet

)

Frees an RTPDataPacket returned by PopDataPacket.

Note

Since we return UDPPackets and not pointers to packets we don't leak if this isn't called, but by preventing the reference count on the QByteArrays from going to 0 we can reuse the byte array and avoid mallocs.

Definition at line 49 of file packetbuffer.cpp.

Referenced by UDPPacketBuffer::PushFECPacket(), RTPPacketBuffer::PushFECPacket(), and IPTVStreamHandlerWriteHelper::timerEvent().

Member Data Documentation

m_bitrate

uint PacketBuffer::m_bitrate

protected

Definition at line 44 of file packetbuffer.h.

m_next_empty_packet_key

uint64_t PacketBuffer::m_next_empty_packet_key

protected

Packets key to use for next empty packet.

The upper 32 bits are random and the lower 32 bits are incremented from 0.

Definition at line 49 of file packetbuffer.h.

Referenced by FreePacket(), and GetEmptyPacket().

m_empty_packets

QMap<uint64_t, UDPPacket> PacketBuffer::m_empty_packets

protected

Packets ready for reuse.

Definition at line 52 of file packetbuffer.h.

Referenced by FreePacket(), and GetEmptyPacket().

m_available_packets

QList<UDPPacket> PacketBuffer::m_available_packets

protected

Ordered list of available packets.

Definition at line 55 of file packetbuffer.h.

Referenced by HasAvailablePacket(), PopDataPacket(), UDPPacketBuffer::PushDataPacket(), and RTPPacketBuffer::PushDataPacket().

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

• mythtv/libs/libmythtv/recorders/rtp/packetbuffer.h
• mythtv/libs/libmythtv/recorders/rtp/packetbuffer.cpp