Dirac - A Video Codec

Created by the British Broadcasting Corporation.

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dirac::DiracByteStream Class Reference

Represents a series of bytes in the Dirac bytestream specfication format. More...

#include <dirac_byte_stream.h>

Inheritance diagram for dirac::DiracByteStream:

[legend]Collaboration diagram for dirac::DiracByteStream:

[legend]List of all members.

Public Member Functions

• DiracByteStream ()

  Constructor.
  

• ~DiracByteStream ()

  Destructor.
  

• void AddBytes (char *start, int count)

  Adds Dirac-formatted bytes to internal-byte-stream for processing.
  

• DiracByteStats GetLastUnitStats ()

  Gets the statistics of the most recent parse-unit to be processed.
  

• ParseUnitByteIO * GetNextParseUnit ()

  Gets the next parse-unit in the current byte-stream.
  

• DiracByteStats GetSequenceStats () const

  Gets stats for current sequence.
  

• void AddAccessUnit (AccessUnitByteIO *p_accessunit_byteio)

  Adds a random access point to the current Dirac byte stream.
  

• void AddFrame (FrameByteIO *p_frame_byteio)

  Adds a frame to the current Dirac byte stream.
  

• void Clear ()

  Clear parse-units.
  

• DiracByteStats EndSequence ()

  Insert end-of-sequence data.
  

• const std::string GetBytes ()

  Gets a pointer to all current output bytes.
  

• bool IsUnitAvailable () const

  Any info pending?
  

Private Types

• typedef std::queue< std::pair<
  ParseUnitType, ParseUnitByteIO * > > ParseUnitList

  Parse-units in Dirac stream.
  

Private Attributes

• ParseUnitList m_parse_unit_list
• ParseUnitByteIO * mp_prev_parse_unit

  Last unit to be processed Required for specifying the previous parse-unit.
  

• ParseUnitByteIO * mp_next_parse_unit

  Next parse-unit waiting to be processed A parse-unit can only be declared valid only if it has been validated against the next unit in the stream.
  

• DiracByteStats m_sequence_stats

  Stats for current sequence.
  

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Detailed Description

These bytes are grouped into more managable parse units by this class.

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Member Typedef Documentation

typedef std::queue< std::pair <ParseUnitType, ParseUnitByteIO*> > dirac::DiracByteStream::ParseUnitList [private]

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Constructor & Destructor Documentation

dirac::DiracByteStream::DiracByteStream (   )

dirac::DiracByteStream::~DiracByteStream (   )

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Member Function Documentation

void dirac::DiracByteStream::AddAccessUnit (  AccessUnitByteIO *  p_accessunit_byteio  )

Parameters: p_accessunit_byteio  Access-unit stream. This class is now responsible for deleting

void dirac::DiracByteStream::AddBytes (  char *  start, int  count )

Parameters: start  Start of char list count  Number of chars

void dirac::DiracByteStream::AddFrame (  FrameByteIO *  p_frame_byteio  )

Parameters: p_frame_byteio  Frame stream. This class is now responsible for deleting.

void dirac::DiracByteStream::Clear (   )

DiracByteStats dirac::DiracByteStream::EndSequence (   )

Returns: Sequence stats

const std::string dirac::DiracByteStream::GetBytes (   )  [virtual]

Reimplemented from dirac::ByteIO.

DiracByteStats dirac::DiracByteStream::GetLastUnitStats (   )

Returns: Byte-statistics

ParseUnitByteIO* dirac::DiracByteStream::GetNextParseUnit (   )

DiracByteStats dirac::DiracByteStream::GetSequenceStats (   )  const

bool dirac::DiracByteStream::IsUnitAvailable (   )  const

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Member Data Documentation

ParseUnitList dirac::DiracByteStream::m_parse_unit_list [private]

DiracByteStats dirac::DiracByteStream::m_sequence_stats [private]

ParseUnitByteIO* dirac::DiracByteStream::mp_next_parse_unit [private]

ParseUnitByteIO* dirac::DiracByteStream::mp_prev_parse_unit [private]

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

• dirac_byte_stream.h

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© 2004 British Broadcasting Corporation. Dirac code licensed under the Mozilla Public License (MPL) Version 1.1.
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