Burger::DecompressMP3::GranuleInfo_t Struct Reference

Public Member Functions
void	MakeAntiAliasTable (float *pOutput) const
	Generate anti alias table.
void	Layer3JointIStereo (float *pOutput, const uint_t *pScaleFactorIndexes, uint_t uSampleRateIndex, uint_t bStereo, eMPEGAudioVersionID uVersion) const
	Create the stereo channels for Joint I Stereo mode.

Public Attributes
const float *	m_pGainPow2
	Active gain pow() table.
const float *	m_pGains [3]
	Gain tables for each channel.
uint_t	m_uScaleFactorSelectorInfo
	ScaleFactor Selection Information (4 bits)
uint_t	m_uPart2_3_Length
	Number of bits allocated for Scale Factors.
uint_t	m_uBigValues
	Number of big value regions 0-288.
uint_t	m_uScaleFactorCompress
	Number of bits used for the transmission of scale factors.
uint_t	m_uMixedBlockFlag
	Enable mixed blocks.
uint_t	m_uTableSelect [3]
	Huffman table selections.
uint_t	m_uMaxBands [3]
	Max bands.
uint_t	m_uMaxBandLast
	Last max band.
uint_t	m_uMaxSubBand
	Maximum sub band.
uint_t	m_uRegion1Start
	Start value for region 1.
uint_t	m_uRegion2Start
	Start value for region 2.
uint_t	m_uPreFlag
	If set,the values of a defined table are added to the scale factors.
uint_t	m_uScaleFactorScale
	The scale factors are logarithmically quantized with a step size of 2.
uint_t	m_uCount1TableSelect
	Two possible Huffman code tables are available for the count1 region. This field specifies which table to apply.
eGranuleBlockType	m_uBlockType
	Window block type.

Member Function Documentation

Layer3JointIStereo()

void BURGER_API Burger::DecompressMP3::GranuleInfo_t::Layer3JointIStereo	(	float *	pOutput,
		const uint_t *	pScaleFactorIndexes,
		uint_t	uSampleRateIndex,
		uint_t	bStereo,
		eMPEGAudioVersionID	uVersion ) const

Create the stereo channels for Joint I Stereo mode.

---

In Layer3 there is an encoding mode called Joint I Stereo, this function applies to the hybrid buffer the volumes calculated from a mono channel and duplicated to the other channel.

Parameters

pOutput	Pointer to hybrid buffer (Left and right channels)
pScaleFactorIndexes	Pointer to the up to 39 entry scale factor indexes
uSampleRateIndex	Sample rate index value
bStereo	TRUE if using stereo power tables, FALSE to use the mono tables
uVersion	Mpeg version being processed

MakeAntiAliasTable()

void BURGER_API Burger::DecompressMP3::GranuleInfo_t::MakeAntiAliasTable

(

float *

pOutput

)

const

Generate anti alias table.

---

Parameters

pOutput

Pointer to a buffer cSubBandLimit*cSideSampleLimit entries in size

Member Data Documentation

m_pGainPow2

const float* Burger::DecompressMP3::GranuleInfo_t::m_pGainPow2

Active gain pow() table.

m_pGains

const float* Burger::DecompressMP3::GranuleInfo_t::m_pGains[3]

Gain tables for each channel.

m_uBigValues

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uBigValues

Number of big value regions 0-288.

m_uBlockType

eGranuleBlockType Burger::DecompressMP3::GranuleInfo_t::m_uBlockType

Window block type.

m_uCount1TableSelect

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uCount1TableSelect

Two possible Huffman code tables are available for the count1 region. This field specifies which table to apply.

m_uMaxBandLast

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uMaxBandLast

Last max band.

m_uMaxBands

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uMaxBands[3]

Max bands.

m_uMaxSubBand

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uMaxSubBand

Maximum sub band.

m_uMixedBlockFlag

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uMixedBlockFlag

Enable mixed blocks.

m_uPart2_3_Length

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uPart2_3_Length

Number of bits allocated for Scale Factors.

m_uPreFlag

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uPreFlag

If set,the values of a defined table are added to the scale factors.

m_uRegion1Start

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uRegion1Start

Start value for region 1.

m_uRegion2Start

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uRegion2Start

Start value for region 2.

m_uScaleFactorCompress

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uScaleFactorCompress

Number of bits used for the transmission of scale factors.

m_uScaleFactorScale

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uScaleFactorScale

The scale factors are logarithmically quantized with a step size of 2.

m_uScaleFactorSelectorInfo

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uScaleFactorSelectorInfo

ScaleFactor Selection Information (4 bits)

m_uTableSelect

uint_t Burger::DecompressMP3::GranuleInfo_t::m_uTableSelect[3]

Huffman table selections.