Dirac - A Video Codec

Created by the British Broadcasting Corporation.

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dirac Namespace Reference

Definition of class AccessUnitByteIO. More...

Classes

• class AccessUnitByteIO

  A random access point within a Dirac bytestream. More...
  

• class ByteIO

  Class ByteIO - top-level class for reading/writing bytes to a stream. More...
  

• class ComponentByteIO

  Frame component in Dirac bytestream format. More...
  

• class DiracByteStats

  Class DiracByteStats - for collecting statistics on aspects of the Dirac byte-stream. More...
  

• class DiracByteStream

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

• class DisplayParamsByteIO

  Represents compressed display-parameter data contained in an AccessUnit. More...
  

• class EndOfSequenceByteIO

  Signals the end of a sequence in a Dirac-formatted bitstream. More...
  

• class FrameByteIO

  A compressed frame in Dirac bytestream format. More...
  

• class MvDataByteIO

  Represents compressed sequence-parameter data used in an AccessUnit. More...
  

• class ParseParamsByteIO

  Represents compressed parse-parameter data used in an AccessUnit. More...
  

• class ParseUnitByteIO

  Represents a collection of data in a Dirac bytestream that can be parsed as a self-contained unit. More...
  

• class SeqParamsByteIO

  Represents compressed sequence-parameter data used in an AccessUnit. More...
  

• class SubbandByteIO

  Subband Dirac-bytestream input/output. More...
  

• class TransformByteIO

  Represents compressed sequence-parameter data used in an AccessUnit. More...
  

• class ContextLookupTable

  Lookup Table Class (for Arithmetic Coding Contexts). More...
  

• class Context
• class ArithCodecBase
• class ArithCodec

  Abstract binary arithmetic coding class. More...
  

• class Range

  Range type. More...
  

• class OneDArray

  A template class for one-dimensional arrays. More...
  

• class TwoDArray

  A template class for two-dimensional arrays. More...
  

• class BandCodec

  A general class for coding and decoding wavelet subband data. More...
  

• class LFBandCodec

  A class specially for coding the LF subbands. More...
  

• class IntraDCBandCodec

  A class specially for coding the DC subband of Intra frames. More...
  

• class CommandLine
• class FrameSort

  Frame type Class. More...
  

• class PicArray

  A class for picture component data. More...
  

• class CostType

  A structure for recording costs, particularly in quantisation. More...
  

• class EntropyCorrector

  A class used for correcting estimates of entropy. More...
  

• class OLBParams

  Parameters for overlapped block motion compensation. More...
  

• class SeqParams

  Parameters relating to the video sequence being encoded/decoded. More...
  

• class Rational

  Class defining a rational number. More...
  

• class ParseParams

  Parameters relating to the complexity of encoder/decoder. More...
  

• class SourceParams

  Parameters relating to the source material being encoded/decoded. More...
  

• class FrameParams

  Parameters for initialising frame class objects. More...
  

• class CodeBlocks

  Structure to hold code block sizes when spatial partitioning is used. More...
  

• class CodecParams

  Parameters common to coder and decoder operation. More...
  

• class EncoderParams

  Parameters for the encoding process. More...
  

• class DecoderParams

  Parameters for the decoding process. More...
  

• class QuantiserLists

  Class for encapsulating quantiser data. More...
  

• class DiracException

  DiracException is the class which should be used for all exceptions within Dirac. More...
  

• class Frame

  A class for encapsulating all the data relating to a frame. More...
  

• class FrameBuffer

  Holds frames both for reference and to overcome reordering delay. More...
  

• class MotionCompensator

  Abstract Motion compensator class. More...
  

• class MotionCompensator_Pixel

  Pixel precision Motion compensator class. More...
  

• class MotionCompensator_HalfPixel

  Half Pixel precision Motion compensator class. More...
  

• class MotionCompensator_QuarterPixel

  Quarter Pixel precision Motion compensator class. More...
  

• class MotionCompensator_EighthPixel

  Eighth Pixel precision Motion compensator class. More...
  

• class MotionVector

  Motion vector class - just a pair. More...
  

• class MvCostData

  Class for recording costs derived in motion estimation. More...
  

• class MvData

  Class for all the motion vector data. More...
  

• class MEData

  Class for all the motion estimation data. More...
  

• class MvDataCodec

  Codes and decodes all the Motion Vector data. More...
  

• class StreamPicOutput

  Class for outputting pictures. More...
  

• class MemoryStreamOutput
• class FileStreamOutput
• class StreamPicInput

  Picture input class. More...
  

• class MemoryStreamInput
• class FileStreamInput

  Picture input class. More...
  

• class UpConverter

  Upconversion class. More...
  

• class CodeBlock

  Class for encapsulating metadata concerning a block of coefficients in a subband. More...
  

• class Subband

  Class encapsulating all the metadata relating to a wavelet subband. More...
  

• class SubbandList

  A class encapulating all the subbands produced by a transform. More...
  

• class WaveletTransform

  A class to do wavelet transforms. More...
  

• class CompCompressor

  Compress a frame component. More...
  

• class FrameCompressor

  Compress a single image frame. More...
  

• class QualityMonitor

  Class to monitor the quality of pictures and adjust coding parameters appropriately. More...
  

• class QuantChooser

  Choose a quantiser. More...
  

• class SequenceCompressor

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

• class CompDecompressor

  Compress a frame component. More...
  

• class InputStreamBuffer

  Input Stream Buffer Class. More...
  

• class DiracParser

  Dirac Stream Parser Class. More...
  

• class FrameDecompressor

  Compress a single image frame. More...
  

• class SequenceDecompressor

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

• class BlockMatcher

  Class to do block matching. More...
  

• class DownConverter

  A class for fast downconversion of picture data. More...
  

• class ModeDecider

  Decides between macroblock and block prediction modes. More...
  

• class SubpelRefine

  The SubpelRefine class takes pixel-accurate motion vectors and refines them to 1/8-pixel accuracy. More...
  

• class BlockDiffParams

  A class encapsulating parameters for calculating a block difference value (a single instance of matching). More...
  

• class BlockDiff

  An abstract class for doing block difference calculations. More...
  

• class PelBlockDiff

  A class for doing block differences to pixel accuracy, inherited from BlockDiff. More...
  

• class IntraBlockDiff

  A class for calculating the difference between a block and its DC value (average). More...
  

• class BiBlockDiff

  A virtual class for bi-directional differences. More...
  

• class BlockDiffUp

  A virtual class for doing differences with sub-pixel vectors. More...
  

• class BlockDiffHalfPel

  A class for doing differences with half-pixel accurate vectors. More...
  

• class BlockDiffQuarterPel

  A class for doing differences with quarter-pixel accurate vectors. More...
  

• class BlockDiffEighthPel

  A class for doing differences with eighth-pixel accurate vectors. More...
  

• class BiBlockHalfPel

  A class for computing a bidirection difference for half-pel vectors. More...
  

• class BiBlockQuarterPel

  A class for computing a bidirection difference for quarter-pel vectors. More...
  

• class BiBlockEighthPel

  A class for computing a bidirection difference for eighth-pel vectors. More...
  

• class MotionEstimator

  Class to handle the whole motion estimation process. More...
  

• class PixelMatcher

Typedefs

• typedef short ValueType
• typedef int CalcValueType
• typedef MotionVector< int > MVector

  MVector class is a vector of ints.
  

• typedef MotionVector< int > ImageCoords

  ImageCoords class is a vector of ints.
  

• typedef TwoDArray< MVector > MvArray

  MvArray is a two-D array of MVectors.
  

• typedef TwoDArray< MotionVector<
  float > > MvFloatArray

  An array of float-based motion vectors for doing global motion calcs.
  

• typedef std::vector< std::vector<
  MVector > > CandidateList

Enumerations

• enum StatType {
    STAT_TOTAL_BYTE_COUNT = 0, STAT_MV_BYTE_COUNT, STAT_YCOMP_BYTE_COUNT, STAT_UCOMP_BYTE_COUNT,
    STAT_VCOMP_BYTE_COUNT
  }
• enum ParseUnitType { PU_ACCESS_UNIT = 0, PU_FRAME, PU_END_OF_SEQUENCE, PU_UNDEFINED }
• enum PredMode {
    INTRA, REF1_ONLY, REF2_ONLY, REF1AND2,
    UNDEFINED
  }

  Prediction modes for blocks. More...
  

• enum CompSort { Y_COMP, U_COMP, V_COMP }

  Types of picture component. More...
  

• enum AddOrSub { ADD, SUBTRACT }

  Addition or subtraction. More...
  

• enum Direction { FORWARD, BACKWARD }

  Forward or backward. More...
  

• enum CtxAliases {
    SIGN0_CTX, SIGN_POS_CTX, SIGN_NEG_CTX, Z_FBIN1z_CTX,
    Z_FBIN1nz_CTX, Z_FBIN2_CTX, Z_FBIN3_CTX, Z_FBIN4_CTX,
    Z_FBIN5_CTX, Z_FBIN6plus_CTX, NZ_FBIN1z_CTX, NZ_FBIN1nz_CTX,
    NZ_FBIN2_CTX, NZ_FBIN3_CTX, NZ_FBIN4_CTX, NZ_FBIN5_CTX,
    NZ_FBIN6plus_CTX, INFO_CTX, BLOCK_SKIP_CTX, Q_OFFSET_FOLLOW_CTX,
    Q_OFFSET_INFO_CTX, Q_OFFSET_SIGN_CTX, TOTAL_COEFF_CTXS
  }

  Contexts used for coefficient coding. More...
  

• enum MvCtxAliases {
    YDC_FBIN1_CTX, YDC_FBIN2plus_CTX, YDC_INFO_CTX, YDC_SIGN_CTX,
    UDC_FBIN1_CTX, UDC_FBIN2plus_CTX, UDC_INFO_CTX, UDC_SIGN_CTX,
    VDC_FBIN1_CTX, VDC_FBIN2plus_CTX, VDC_INFO_CTX, VDC_SIGN_CTX,
    REF1x_FBIN1_CTX, REF1x_FBIN2_CTX, REF1x_FBIN3_CTX, REF1x_FBIN4_CTX,
    REF1x_FBIN5plus_CTX, REF1x_INFO_CTX, REF1x_SIGN_CTX, REF1y_FBIN1_CTX,
    REF1y_FBIN2_CTX, REF1y_FBIN3_CTX, REF1y_FBIN4_CTX, REF1y_FBIN5plus_CTX,
    REF1y_INFO_CTX, REF1y_SIGN_CTX, REF2x_FBIN1_CTX, REF2x_FBIN2_CTX,
    REF2x_FBIN3_CTX, REF2x_FBIN4_CTX, REF2x_FBIN5plus_CTX, REF2x_INFO_CTX,
    REF2x_SIGN_CTX, REF2y_FBIN1_CTX, REF2y_FBIN2_CTX, REF2y_FBIN3_CTX,
    REF2y_FBIN4_CTX, REF2y_FBIN5plus_CTX, REF2y_INFO_CTX, REF2y_SIGN_CTX,
    PMODE_BIT0_CTX, PMODE_BIT1_CTX, MB_CMODE_CTX, MB_SPLIT_BIN1_CTX,
    MB_SPLIT_BIN2_CTX, MB_SPLIT_INFO_CTX, TOTAL_MV_CTXS
  }

  Contexts used for MV data coding. More...
  

• enum DiracErrorCode {
    ERR_UNSUPPORTED_STREAM_DATA = 0, ERR_END_OF_STREAM, ERR_INVALID_VIDEO_FORMAT, ERR_INVALID_CHROMA_FORMAT,
    ERR_INVALID_FRAME_RATE, ERR_INVALID_SIGNAL_RANGE, ERR_INVALID_ASPECT_RATIO, ERR_INVALID_VIDEO_DEPTH,
    ERR_INVALID_MOTION_VECTOR_PRECISION
  }

  Enumeration of Dirac-defined error codes. More...
  

• enum DiracSeverityCode {
    SEVERITY_NO_ERROR = 0, SEVERITY_WARNING, SEVERITY_FRAME_ERROR, SEVERITY_ACCESSUNIT_ERROR,
    SEVERITY_SEQUENCE_ERROR, SEVERITY_TERMINATE
  }

  Error-severity states. More...
  

Functions

• template<class T> std::ostream & operator<< (std::ostream &stream, TwoDArray< T > &array)

  A function for extracting array data.
  

• template<class T> std::istream & operator>> (std::istream &stream, TwoDArray< T > &array)

  A function for inserting array data.
  

• VideoFormat IntToVideoFormat (int video_format)

  Function to convert an integer to a valid VideoFormat.
  

• ChromaFormat IntToChromaFormat (int chroma_format)

  Function to convert an integer to a valid VideoFormat.
  

• FrameRateType IntToFrameRateType (int frame_rate_idx)

  Function to convert an integer to a valid FrameRate type.
  

• AspectRatioType IntToAspectRatioType (int aspect_ratio_idx)

  Function to convert an integer to a valid AspectRatio type.
  

• SignalRangeType IntToSignalRangeType (int signal_range_idx)

  Function to convert an integer to a valid SignalRange type.
  

• MVPrecisionType IntToMVPrecisionType (int mv_prec)

  Function to convert an integer to a valid motion-vector precision type.
  

• ValueType BChk (const ValueType &num, const ValueType &max)

  A simple bounds checking function, very useful in a number of places.
  

• void dirac_assert (const char *p_fname, int line_number, const char *p_mess)
• void dirac_report (const char *p_fname, int line_number, const char *p_mess)
• std::ostream & operator<< (std::ostream &dst, const DiracException &exception)
• template<class T> std::ostream & operator<< (std::ostream &stream, MotionVector< T > &mv)

  Overloaded operator<< for MotionVector class for output to stream.
  

• template<class T> std::istream & operator>> (std::istream &stream, MotionVector< T > &mv)

  Overloaded operator>> for MotionVector class for input from stream.
  

• MVector MvMedian (const MVector &mv1, const MVector &mv2, const MVector &mv3)

  Return the median of three motion vectors.
  

• MVector MvMedian (const std::vector< MVector > &vect_list)

  Return the median of a set of motion vectors.
  

• MVector MvMean (MVector &mv1, MVector &mv2)

  Return the mean of two motion vectors.
  

• int Norm2 (const MVector &mv)

  Return the squared length of a motion vector.
  

• int Norm1 (const MVector &mv)

  Return the sum of the lengths of a motion vector's componets.
  

• unsigned int GetMean (std::vector< unsigned int > &values)

  Return the mean of a set of unsigned integer values.
  

• void SetDefaultCodecParameters (CodecParams &cparams, FrameType ftype)

  Sets default codec parameters - common to encoder and decoder.
  

• void SetDefaultEncoderParameters (EncoderParams &encparams)

  Sets default encoder parameters.
  

• void SetDefaultSourceParameters (const VideoFormat &vf, SourceParams &sparams)

  Sets default Source parameters.
  

• void SetDefaultSequenceParameters (SeqParams &sparams)

  Sets default sequence parameters.
  

• void SetDefaultBlockParameters (OLBParams &bparams, const VideoFormat &video_format)

  Sets default block parameters.
  

• void SetDefaultBlockParameters (OLBParams &bparams, int pidx)

  Sets default block parameters.
  

• unsigned int BlockParametersIndex (const OLBParams &bparams)

  Returns index of block parameters in Defaults table.
  

• void AddNewVlist (CandidateList &vect_list, const MVector &mv, const int xr, const int yr)

  Add a new motion vector list of neighbours of a vector to the set of lists.
  

• void AddNewVlist (CandidateList &vect_list, const MVector &mv, const int xr, const int yr, const int step)

  Add a new motion vector list to the set of lists for sub-pixel matching.
  

• void AddNewVlistD (CandidateList &vect_list, const MVector &mv, const int xr, const int yr)

  Add a new motion vector list of diagnonal neighbours of a vector to the set of lists.
  

• void AddVect (CandidateList &vect_list, const MVector &mv, const int list_num)

  Add a motion vector to the set of motion vector lists.
  

• ValueType GetVar (const MVector &mv1, const MVector &mv2)

  Get the (absolute) variation between two motion vectors.
  

• ValueType GetVar (const std::vector< MVector > &pred_list, const MVector &mv)

  Get the (absolute) variation between a motion vector and a list of motion vectors.
  

---

Typedef Documentation

typedef short dirac::ValueType

typedef int dirac::CalcValueType

typedef MotionVector<int> dirac::MVector

typedef MotionVector<int> dirac::ImageCoords

typedef TwoDArray<MVector> dirac::MvArray

typedef TwoDArray< MotionVector<float> > dirac::MvFloatArray

typedef std::vector< std::vector< MVector > > dirac::CandidateList

---

Enumeration Type Documentation

enum dirac::StatType

Enumerator:

STAT_TOTAL_BYTE_COUNT
STAT_MV_BYTE_COUNT
STAT_YCOMP_BYTE_COUNT
STAT_UCOMP_BYTE_COUNT
STAT_VCOMP_BYTE_COUNT

enum dirac::ParseUnitType

Enumerator:

PU_ACCESS_UNIT
PU_FRAME
PU_END_OF_SEQUENCE
PU_UNDEFINED

enum dirac::PredMode

Enumerator:

INTRA
REF1_ONLY
REF2_ONLY
REF1AND2
UNDEFINED

enum dirac::CompSort

Enumerator:

Y_COMP
U_COMP
V_COMP

enum dirac::AddOrSub

Enumerator:

ADD
SUBTRACT

enum dirac::Direction

Enumerator:

FORWARD
BACKWARD

enum dirac::CtxAliases

Enumerator:

SIGN0_CTX
SIGN_POS_CTX
SIGN_NEG_CTX
Z_FBIN1z_CTX
Z_FBIN1nz_CTX
Z_FBIN2_CTX
Z_FBIN3_CTX
Z_FBIN4_CTX
Z_FBIN5_CTX
Z_FBIN6plus_CTX
NZ_FBIN1z_CTX
NZ_FBIN1nz_CTX
NZ_FBIN2_CTX
NZ_FBIN3_CTX
NZ_FBIN4_CTX
NZ_FBIN5_CTX
NZ_FBIN6plus_CTX
INFO_CTX
BLOCK_SKIP_CTX
Q_OFFSET_FOLLOW_CTX
Q_OFFSET_INFO_CTX
Q_OFFSET_SIGN_CTX
TOTAL_COEFF_CTXS

enum dirac::MvCtxAliases

Enumerator:

YDC_FBIN1_CTX
YDC_FBIN2plus_CTX
YDC_INFO_CTX
YDC_SIGN_CTX
UDC_FBIN1_CTX
UDC_FBIN2plus_CTX
UDC_INFO_CTX
UDC_SIGN_CTX
VDC_FBIN1_CTX
VDC_FBIN2plus_CTX
VDC_INFO_CTX
VDC_SIGN_CTX
REF1x_FBIN1_CTX
REF1x_FBIN2_CTX
REF1x_FBIN3_CTX
REF1x_FBIN4_CTX
REF1x_FBIN5plus_CTX
REF1x_INFO_CTX
REF1x_SIGN_CTX
REF1y_FBIN1_CTX
REF1y_FBIN2_CTX
REF1y_FBIN3_CTX
REF1y_FBIN4_CTX
REF1y_FBIN5plus_CTX
REF1y_INFO_CTX
REF1y_SIGN_CTX
REF2x_FBIN1_CTX
REF2x_FBIN2_CTX
REF2x_FBIN3_CTX
REF2x_FBIN4_CTX
REF2x_FBIN5plus_CTX
REF2x_INFO_CTX
REF2x_SIGN_CTX
REF2y_FBIN1_CTX
REF2y_FBIN2_CTX
REF2y_FBIN3_CTX
REF2y_FBIN4_CTX
REF2y_FBIN5plus_CTX
REF2y_INFO_CTX
REF2y_SIGN_CTX
PMODE_BIT0_CTX
PMODE_BIT1_CTX
MB_CMODE_CTX
MB_SPLIT_BIN1_CTX
MB_SPLIT_BIN2_CTX
MB_SPLIT_INFO_CTX
TOTAL_MV_CTXS

enum dirac::DiracErrorCode

Enumerator:

ERR_UNSUPPORTED_STREAM_DATA
ERR_END_OF_STREAM
ERR_INVALID_VIDEO_FORMAT
ERR_INVALID_CHROMA_FORMAT
ERR_INVALID_FRAME_RATE
ERR_INVALID_SIGNAL_RANGE
ERR_INVALID_ASPECT_RATIO
ERR_INVALID_VIDEO_DEPTH
ERR_INVALID_MOTION_VECTOR_PRECISION

enum dirac::DiracSeverityCode

Enumerator:

SEVERITY_NO_ERROR
SEVERITY_WARNING
SEVERITY_FRAME_ERROR
SEVERITY_ACCESSUNIT_ERROR
SEVERITY_SEQUENCE_ERROR
SEVERITY_TERMINATE

---

Function Documentation

template<class T>

std::ostream& dirac::operator<<	(	std::ostream &	stream,
		TwoDArray< T > &	array
	)

template<class T>

std::istream& dirac::operator>>	(	std::istream &	stream,
		TwoDArray< T > &	array
	)

VideoFormat dirac::IntToVideoFormat

(

int

video_format

)

Parameters:

video_format

Integer corresponding to a format

Returns:

Valid video-format (returns VIDEO_FORMAT_UNDEFINED if no valid format found)

ChromaFormat dirac::IntToChromaFormat

(

int

chroma_format

)

Parameters:

chroma_format

Integer corresponding to a format

Returns:

Valid chroma-format (returns formatNK if no valid format found)

FrameRateType dirac::IntToFrameRateType

(

int

frame_rate_idx

)

Parameters:

frame_rate_idx

Integer corresponding to a frame-rate in the spec table

Returns:

Valid FrameRateType (returns FRAMERATE_UNDEFINED if no valid frame-rate found)

AspectRatioType dirac::IntToAspectRatioType

(

int

aspect_ratio_idx

)

Parameters:

aspect_ratio_idx

Integer corresponding to a aspect-ratio in the spec table

Returns:

Valid AspectRatioType (returns ASPECT_RATIO_UNDEFINED if no valid aspect-ratio found)

SignalRangeType dirac::IntToSignalRangeType

(

int

signal_range_idx

)

Parameters:

signal_range_idx

Integer corresponding to a signal-range in the spec table

Returns:

Valid SignalRangeType (returns SIGNAL_RANGE_UNDEFINED if no valid signal-ratio found)

MVPrecisionType dirac::IntToMVPrecisionType

(

int

mv_prec

)

Parameters:

mv_prec

Integer corresponding to a valid motion-vector precision

Returns:

Valid MVPrecisionType (returns SIGNAL_RANGE_UNDEFINED if no valid precision found)

ValueType dirac::BChk	(	const ValueType &	num,
		const ValueType &	max
	)			[inline]

void dirac::dirac_assert	(	const char *	p_fname,
		int	line_number,
		const char *	p_mess
	)

Print a message to standard error and abort if in debug mode

void dirac::dirac_report	(	const char *	p_fname,
		int	line_number,
		const char *	p_mess
	)

Print a message to standard error

std::ostream& dirac::operator<<	(	std::ostream &	dst,
		const DiracException &	exception
	)

template<class T>

std::ostream& dirac::operator<<	(	std::ostream &	stream,
		MotionVector< T > &	mv
	)

template<class T>

std::istream& dirac::operator>>	(	std::istream &	stream,
		MotionVector< T > &	mv
	)

MVector dirac::MvMedian	(	const MVector &	mv1,
		const MVector &	mv2,
		const MVector &	mv3
	)

MVector dirac::MvMedian

(

const std::vector< MVector > &

vect_list

)

MVector dirac::MvMean	(	MVector &	mv1,
		MVector &	mv2
	)

int dirac::Norm2

(

const MVector &

mv

)

[inline]

int dirac::Norm1

(

const MVector &

mv

)

[inline]

unsigned int dirac::GetMean

(

std::vector< unsigned int > &

values

)

[inline]

void dirac::SetDefaultCodecParameters	(	CodecParams &	cparams,
		FrameType	ftype
	)

Parameters:

	cparams	Codec Params objects for setting defaults
	ftype	Frame type i,e, INTRA or INTER

void dirac::SetDefaultEncoderParameters

(

EncoderParams &

encparams

)

Parameters:

encparams

Params objects for setting defaults

void dirac::SetDefaultSourceParameters	(	const VideoFormat &	vf,
		SourceParams &	sparams
	)

Parameters:

	vf	Video Format
	sparams	Params object for setting defaults

void dirac::SetDefaultSequenceParameters

(

SeqParams &

sparams

)

Parameters:

sparams

Params object for setting defaults

void dirac::SetDefaultBlockParameters	(	OLBParams &	bparams,
		const VideoFormat &	video_format
	)

Parameters:

	bparams	Params object for setting defaults
	video_format	Video format

void dirac::SetDefaultBlockParameters	(	OLBParams &	bparams,
		int	pidx
	)

Parameters:

	bparams	Params object for setting defaults
	pidx	Index into Block Parameters table

unsigned int dirac::BlockParametersIndex

(

const OLBParams &

bparams

)

Parameters:

bparams

Params object for getting index

void dirac::AddNewVlist	(	CandidateList &	vect_list,
		const MVector &	mv,
		const int	xr,
		const int	yr
	)

void dirac::AddNewVlist	(	CandidateList &	vect_list,
		const MVector &	mv,
		const int	xr,
		const int	yr,
		const int	step
	)

void dirac::AddNewVlistD	(	CandidateList &	vect_list,
		const MVector &	mv,
		const int	xr,
		const int	yr
	)

void dirac::AddVect	(	CandidateList &	vect_list,
		const MVector &	mv,
		const int	list_num
	)

Add a motion vector to the set of motion vector lists, making sure it's not a duplicate.

ValueType dirac::GetVar	(	const MVector &	mv1,
		const MVector &	mv2
	)

Return the variation between two motion vectors, computed as the sum of absolute differences of their components.

ValueType dirac::GetVar	(	const std::vector< MVector > &	pred_list,
		const MVector &	mv
	)

Return the variation between a motion vector and a list of motion vectos, computed as the sum of absolute differences between the components of the vector and the median vector produced by the list of vectors

---

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