# Dirac - A Video Codec

Created by the British Broadcasting Corporation.

# wavelet_utils.h File Reference

`#include <libdirac_common/arrays.h>`
`#include <libdirac_common/common.h>`
`#include <vector>`
`#include <cmath>`
`#include <iostream>`

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## Namespaces

- namespace dirac

## Classes

- class dirac::CodeBlock
    Class for encapsulating metadata concerning a block of coefficients in a subband. More...
- class dirac::Subband
    Class encapsulating all the metadata relating to a wavelet subband. More...
- class dirac::SubbandList
    A class encapulating all the subbands produced by a transform. More...
- class dirac::WaveletTransform
    A class to do wavelet transforms. More...
- class dirac::WaveletTransform::VHFilter
    A virtual parent class to do vertical and horizontal splitting with wavelet filters. More...
- class dirac::WaveletTransform::VHFilterDAUB9_7
    Class to do Daubechies (9,7) filtering operations. More...
- class dirac::WaveletTransform::VHFilterLEGALL5_3
    Class to do (5,3) wavelet filtering operations. More...
- class dirac::WaveletTransform::VHFilterDD9_3
    A short filter that's actually close to Daubechies (9,7) but with just two lifting steps. More...
- class dirac::WaveletTransform::VHFilterDD13_5
    An extension of DD9_3, with a better low-pass filter but more computation. More...
- class dirac::WaveletTransform::VHFilterHAAR0
    Class to do Haar wavelet filtering operations. More...
- class dirac::WaveletTransform::VHFilterHAAR1
    Class to do Haar wavelet filtering operations with a single shift per level. More...
- class dirac::WaveletTransform::VHFilterHAAR2
    Class to do Haar wavelet filtering operations with a double shift per level. More...
- class dirac::WaveletTransform::PredictStepShift< shift >
    Class to do two-tap prediction lifting step. More...
- class dirac::WaveletTransform::UpdateStepShift< shift >
    Class to do two-tap updating lifting step. More...
- class dirac::WaveletTransform::PredictStepFourTap< shift, tap1, tap2 >
    Class to do symmetric four-tap prediction lifting step. More...
- class dirac::WaveletTransform::UpdateStepFourTap< shift, tap1, tap2 >
    Class to do symmetric four-tap update lifting step. More...
- class dirac::WaveletTransform::PredictStep97< gain >
    Class to do two-tap prediction lifting step for Daubechies (9,7). More...
- class dirac::WaveletTransform::UpdateStep97< gain >
    Class to do two-tap update lifting step for Daubechies (9,7). More...

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