Video::XMVWMV2Codec::DecodeContext Struct Reference

Context for decoding a frame. More...

Collaboration diagram for Video::XMVWMV2Codec::DecodeContext:

Public Member Functions
	DecodeContext (Common::BitStream &b)
void	setQScale (int32 qS)
	Set the quantizer scale and calculate the DC step size and default predictor. More...
void	startRow ()
void	finishRow ()
void	startMacroBlock (uint32 cbp)
void	finishMacroBlock ()

Public Attributes
Common::BitStream &	bits
int32	qScale
int32	dcStepSize
int32	defaultPredictor
int32 *	acQuantTop [3]
int32	acQuantLeft [4][kBlockSize]
int32	dcTopLeft [4]
ACDecoder *	decoderAC [2]
Common::Huffman *	huffDC [2]
CBP *	rowCBP
CBP *	curCBP
CBP	cbpTopLeft
CBP	cbpTop
bool	hasACPerMacroBlock
bool	hasACPrediction
uint32	acRLERunLength
uint32	acRLELevelLength
BlockContext	block [6]

Detailed Description

Context for decoding a frame.

Definition at line 132 of file xmvwmv2.h.

Constructor & Destructor Documentation

DecodeContext()

Video::XMVWMV2Codec::DecodeContext::DecodeContext

(

Common::BitStream &

b

)

Definition at line 120 of file xmvwmv2.cpp.

References Video::XMVWMV2Codec::BlockContext::acQuantLeft, acQuantLeft, block, Video::XMVWMV2Codec::BlockContext::dcEscapeCode, Video::XMVWMV2Codec::BlockContext::dcTopLeft, dcTopLeft, Video::XMVWMV2Codec::BlockContext::decoderAC, decoderAC, Video::XMVWMV2Codec::BlockContext::hasACCoeffs, Video::XMVWMV2Codec::BlockContext::huffDC, huffDC, Video::kEscapeCodeChroma, and Video::kEscapeCodeLuma.

Member Function Documentation

finishMacroBlock()

void Video::XMVWMV2Codec::DecodeContext::finishMacroBlock

(

)

Definition at line 217 of file xmvwmv2.cpp.

Referenced by Video::XMVWMV2Codec::decodeIFrame().

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finishRow()

void Video::XMVWMV2Codec::DecodeContext::finishRow

(

)

Definition at line 202 of file xmvwmv2.cpp.

Referenced by Video::XMVWMV2Codec::decodeIFrame().

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setQScale()

void Video::XMVWMV2Codec::DecodeContext::setQScale

(

int32

qS

)

Set the quantizer scale and calculate the DC step size and default predictor.

Definition at line 154 of file xmvwmv2.cpp.

Referenced by Video::XMVWMV2Codec::decodeFrame().

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startMacroBlock()

void Video::XMVWMV2Codec::DecodeContext::startMacroBlock

(

uint32

cbp

)

Definition at line 209 of file xmvwmv2.cpp.

Referenced by Video::XMVWMV2Codec::decodeIFrame().

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startRow()

void Video::XMVWMV2Codec::DecodeContext::startRow

(

)

Definition at line 178 of file xmvwmv2.cpp.

References Video::XMVWMV2Codec::kBlockSize.

Referenced by Video::XMVWMV2Codec::decodeIFrame().

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Member Data Documentation

acQuantLeft

int32 Video::XMVWMV2Codec::DecodeContext::acQuantLeft[4][kBlockSize]

Definition at line 140 of file xmvwmv2.h.

Referenced by DecodeContext().

acQuantTop

int32* Video::XMVWMV2Codec::DecodeContext::acQuantTop[3]

Definition at line 139 of file xmvwmv2.h.

Referenced by Video::XMVWMV2Codec::initDecodeContext().

acRLELevelLength

uint32 Video::XMVWMV2Codec::DecodeContext::acRLELevelLength

Definition at line 157 of file xmvwmv2.h.

Referenced by Video::XMVWMV2Codec::decodeIBlock().

acRLERunLength

uint32 Video::XMVWMV2Codec::DecodeContext::acRLERunLength

Definition at line 156 of file xmvwmv2.h.

Referenced by Video::XMVWMV2Codec::decodeIBlock().

bits

Common::BitStream& Video::XMVWMV2Codec::DecodeContext::bits

Definition at line 133 of file xmvwmv2.h.

Referenced by Video::XMVWMV2Codec::decodeFrame(), Video::XMVWMV2Codec::decodeIBlock(), and Video::XMVWMV2Codec::decodeIFrame().

block

BlockContext Video::XMVWMV2Codec::DecodeContext::block[6]

Definition at line 159 of file xmvwmv2.h.

Referenced by DecodeContext(), Video::XMVWMV2Codec::decodeIMacroBlock(), and Video::XMVWMV2Codec::initDecodeContext().

cbpTop

CBP Video::XMVWMV2Codec::DecodeContext::cbpTop

Definition at line 151 of file xmvwmv2.h.

cbpTopLeft

CBP Video::XMVWMV2Codec::DecodeContext::cbpTopLeft

Definition at line 150 of file xmvwmv2.h.

curCBP

CBP* Video::XMVWMV2Codec::DecodeContext::curCBP

Definition at line 148 of file xmvwmv2.h.

Referenced by Video::XMVWMV2Codec::decodeIFrame(), and Video::XMVWMV2Codec::decodeIMacroBlock().

dcStepSize

int32 Video::XMVWMV2Codec::DecodeContext::dcStepSize

Definition at line 136 of file xmvwmv2.h.

Referenced by Video::XMVWMV2Codec::decodeIBlock().

dcTopLeft

int32 Video::XMVWMV2Codec::DecodeContext::dcTopLeft[4]

Definition at line 142 of file xmvwmv2.h.

Referenced by DecodeContext().

decoderAC

ACDecoder* Video::XMVWMV2Codec::DecodeContext::decoderAC[2]

Definition at line 144 of file xmvwmv2.h.

Referenced by DecodeContext(), and Video::XMVWMV2Codec::decodeIFrame().

defaultPredictor

int32 Video::XMVWMV2Codec::DecodeContext::defaultPredictor

Definition at line 137 of file xmvwmv2.h.

hasACPerMacroBlock

bool Video::XMVWMV2Codec::DecodeContext::hasACPerMacroBlock

Definition at line 153 of file xmvwmv2.h.

Referenced by Video::XMVWMV2Codec::decodeIFrame().

hasACPrediction

bool Video::XMVWMV2Codec::DecodeContext::hasACPrediction

Definition at line 154 of file xmvwmv2.h.

Referenced by Video::XMVWMV2Codec::decodeIBlock(), and Video::XMVWMV2Codec::decodeIFrame().

huffDC

Common::Huffman* Video::XMVWMV2Codec::DecodeContext::huffDC[2]

Definition at line 145 of file xmvwmv2.h.

Referenced by DecodeContext(), and Video::XMVWMV2Codec::decodeIFrame().

qScale

int32 Video::XMVWMV2Codec::DecodeContext::qScale

Definition at line 135 of file xmvwmv2.h.

Referenced by Video::XMVWMV2Codec::decodeIBlock().

rowCBP

CBP* Video::XMVWMV2Codec::DecodeContext::rowCBP

Definition at line 147 of file xmvwmv2.h.

Referenced by Video::XMVWMV2Codec::initDecodeContext().

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

• src/video/codecs/xmvwmv2.h
• src/video/codecs/xmvwmv2.cpp