Dirac - A Video Codec

Created by the British Broadcasting Corporation.


Public Member Functions | Protected Member Functions

dirac::FrameSequenceCompressor Class Reference

Compresses a sequence of frames from a stream. More...

#include <seq_compress.h>

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List of all members.

Public Member Functions

Protected Member Functions


Detailed Description

This class compresses a sequence of frames, frame by frame. It currently uses GOP parameters set in the encoder parameters in order to define the temporal prediction structure. A version to incorporate non-GOP structures is TBC.


Constructor & Destructor Documentation

dirac::FrameSequenceCompressor::FrameSequenceCompressor ( StreamPicInput pin,
EncoderParams encp,
DiracByteStream dirac_byte_stream 
)

Creates a sequence compressor that compresses frames i.e. progressive data, and prepares to begin compressing with the first frame.Sets up frame padding in the picture input if necesary

Parameters:
pinan input stream containing a sequence of frames
encpparameters for the encoding process
dirac_byte_streamOutput destination for compressed data
virtual dirac::FrameSequenceCompressor::~FrameSequenceCompressor ( ) [inline, virtual]

Destructor. Must delete IO objects created by constructor.


Member Function Documentation

virtual int dirac::FrameSequenceCompressor::CodedToDisplay ( const int  pnum) [protected, virtual]

Uses the GOP parameters to convert picture numbers in coded order to display order. Pure virtual function. The child class will have to define it.

Parameters:
pnumthe picture number in coded order

Implements dirac::SequenceCompressor.

virtual bool dirac::FrameSequenceCompressor::LoadNextFrame ( ) [virtual]

Load one frame of data into the Sequence Compressor. Sets m_all_done to true if no more data is available to be loaded.

Returns:
true - if frame load succeeded. false - otherwise

Implements dirac::SequenceCompressor.

virtual void dirac::FrameSequenceCompressor::SetPicTypeAndRefs ( PictureParams pparams) [virtual]
virtual void dirac::FrameSequenceCompressor::UpdateCBRModel ( EncPicture my_picture,
const PictureByteIO picture_byteio 
) [protected, virtual]

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

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