Burger::DecompressMP3 Class Reference

Process audio data compressed with MP3. More...

Inheritance diagram for Burger::DecompressMP3:

Collaboration diagram for Burger::DecompressMP3:

Classes
struct	BandInfo_t
struct	Chunk_t
struct	FrameHeader_t
	Decoded 32 bit MP3 packet header. More...
struct	FrameHeaderExt_t
	Decoded 32 bit MP3 packet header with extended information. More...
struct	GranuleInfo_t
struct	HuffmanCodeHeader_t
struct	Layer2_AllocEntry_t
	Preset tables for Version 1, Layer 2 allocation entries. More...
struct	Layer3Huffman_t
struct	Layer3SideInfo_t
struct	XingChunk_t

Public Types
enum	eMPEGAudioVersionID { MPEG_VERSION_2_5 , MPEG_VERSION_RESERVED , MPEG_VERSION_2 , MPEG_VERSION_1 }
enum	eMPEGLayerDescription { MPEG_LAYER_RESERVED , MPEG_LAYER_3 , MPEG_LAYER_2 , MPEG_LAYER_1 }
enum	eMPEGChannelMode {   MPEG_MODE_STEREO , MPEG_MODE_JOINT_STEREO , MPEG_MODE_DUAL_CHANNEL , MPEG_MODE_MONO ,   MPEG_MODE_UNKNOWN }
enum	eMPEGModeExtension { MPEG_MODEEXT_LR_LR , MPEG_MODEEXT_LR_I , MPEG_MODEEXT_MS_LR , MPEG_MODEEXT_MS_I }
enum	eMPEGEmphasis { MPEG_EMP_NONE , MPEG_EMP_50_15MS , MPEG_EMP_RESERVED , MPEG_EMP_CCITJ17 }
enum	eGranuleBlockType { BLOCK_TYPE_NORM , BLOCK_TYPE_START , BLOCK_TYPE_SHORT , BLOCK_TYPE_STOP }

Public Member Functions
const Burger::StaticRTTI *	get_StaticRTTI (void) const noexcept override
	Get the description to the class.
	DecompressMP3 ()
	Default constructor.
virtual	~DecompressMP3 ()
	Default destructor.
eError	Reset (void) override
	Resets the decompresser to defaults.
eError	Process (void *pOutput, uintptr_t uOutputChunkSize, const void *pInput, uintptr_t uInputChunkLength) override
	Decompress audio data using alaw.
Chunk_t *	AddChunk (const uint8_t *pData, uintptr_t uSize)
	Add a new data chunk into the linked list.
void	RemoveLastChunk (void)
	Dispose of the last data chunk.
void	RemoveAllChunks (void)
	Dispose of all of the data chunks.
uint_t	GetByte (void)
	Fetch a byte from the chunk stream.
void	GetBytesFromChunks (uintptr_t uSize)
	Copy data from the chunk list into the bit stream.
uint_t	GetBit (void)
	Fetch a single bit from the m_pWorkPointer stream.
uint_t	GetBits (uint_t uBitCount)
	Fetch a stream of bits from the bit stream.
uint_t	SeekBuffer (uintptr_t uNegativeOffset)
	Update the internal buffer.
void	GetMP3Header (void)
	Fetch the 32 bit MP3 header from the chunk stream.
uintptr_t	ScanForFramePacket (uint_t bFreeMatchMode) const
	Scan ahead for an MP3 frame packet.
int	Layer3AudioDataPrecedesFrame (void) const
	Determine how many bytes to backtrack to next frame.
int	AudioDataPrecedesFrame (void) const
	Determine how many bytes to backtrack to next frame.
void	Layer3GetSideInfoType1 (uint_t uChannelCount, uint_t bMSStereo, uint_t uSampleRateIndex)
	Parse Side information for Layer 1 Docs in mp3_theory.pdf section 5.1.2 Side Information.
void	Layer3GetSideInfoType2 (uint_t uChannelCount, uint_t bMSStereo, uint_t uSampleRateIndex)
	Parse Side information for Layer 2 or 3.
int	Layer3GetSideInfo (void)
	Parse Side information.
uint_t	Layer3GetScaleFactors1 (uint_t *pScaleFactorIndexes, const GranuleInfo_t *pGranuleInfo)
	Parse scale factor indexes for MPeg 1.0.
uint_t	Layer3GetScaleFactors2 (uint_t *pScaleFactorIndexes, GranuleInfo_t *pGranuleInfo, uint_t bStereo)
	Parse scale factor indexes for MPeg 2.0 or 2.5.
uint_t	Layer3Dequantize (float *pHybridBuffer, const uint_t *pScaleFactorIndexes, GranuleInfo_t *pGranuleInfo, uint_t uSampleRateIndex, uint_t uBitsPreviouslyParsed)
	dequantize the Hybrid buffer
void	Layer3ProcessHybridBuffer (float *pHybridInput, float *pHybridOutput, uint_t uChannel, const GranuleInfo_t *pGranuleInfo)
	Process the hybrid buffers.
uint_t	ExtractXingHeader (uintptr_t uSkipAhead)
	Extract data from the Xing chunk.
uintptr_t	ProcessMonoSamples (int16_t *pOutput, uintptr_t uOffset, const float *pBand)
	Create samples from audio band information (Mono)
uintptr_t	ProcessMonoSamples (float *pOutput, uintptr_t uOffset, const float *pBand)
	Create samples from audio band information (Mono)
uintptr_t	ProcessStereoSamples (int16_t *pOutput, uintptr_t uOffset, uint_t uChannel, const float *pBand)
	Create samples from audio band information (Stereo)
uintptr_t	ProcessStereoSamples (float *pOutput, uintptr_t uOffset, uint_t uChannel, const float *pBand)
	Create samples from audio band information (Stereo)
uintptr_t	Layer3DecodeFrame (int16_t *pOutput, uintptr_t uOffset)
	Process a frame of Layer 3 data into 64 samples.
uintptr_t	Layer3DecodeFrame (float *pOutput, uintptr_t uOffset)
	Process a frame of Layer 3 data into 64 samples.
eError	Decode (int16_t *pOutput, uintptr_t uOutputSize, const uint8_t *pInput, uintptr_t uInputSize, uintptr_t *pProcessed)
	Decode MP3 data.
eError	Decode (float *pOutput, uintptr_t uOutputSize, const uint8_t *pInput, uintptr_t uInputSize, uintptr_t *pProcessed)
	Decode MP3 data.
Public Member Functions inherited from Burger::DecompressAudio
SoundManager::eDataType	GetDataType (void) const
	Returns the uncompressed data type this codec will output.
void	SetMono (void)
	Alert the decompression codec to create a single audio channel.
void	SetStereo (void)
	Alert the decompression codec to create stereo channels.
uint_t	IsStereo (void) const
	Obtain the stereo/mono state of the decompresser.
Public Member Functions inherited from Burger::Decompress
	Decompress (void)
	Default constructor.
uintptr_t	GetTotalInputSize (void) const noexcept
	Get the total processed input data in bytes.
uintptr_t	GetTotalOutputSize (void) const noexcept
	Get the total processed output data in bytes.
uintptr_t	GetProcessedInputSize (void) const noexcept
	Get the total processed output data in bytes from the last process pass.
uintptr_t	GetProcessedOutputSize (void) const noexcept
	Get the total processed output data in bytes from the last process pass.
uint32_t	GetSignature (void) const noexcept
	Return the signature for this decompressor.
Public Member Functions inherited from Burger::Base
const char *	get_class_name (void) const noexcept
	Get the name of the class.
virtual	~Base () noexcept=default
	Destructor.

Static Public Member Functions
static DecompressMP3 *	New (void)
	Allocate and initialize a DecompressMP3.

Public Attributes
Chunk_t *	m_pNext
	First entry in the linked list of data chunks.
Chunk_t *	m_pPrev
	Last entry in the linked list of data chunks.
uint8_t *	m_pWorkPointer
	Pointer to m_ByteStreamBuffers.
uintptr_t	m_uRemainingBytes
	Number of bytes remaining stored in the entire linked list.
uintptr_t	m_uPreviousFrameSize
	Previous data frame size, UINTPTR_MAX is none was found.
uintptr_t	m_uFrameSize
	Number of bytes in the frame.
uintptr_t	m_uSideInfoSize
	Number of bytes for Side Information (Including CRC if present)
uintptr_t	m_uMP3DataSize
	Number of compressed byte in the current packet.
uint_t	m_uBitIndex
	Which bit is being parse for bit streaming (0-7)
uint_t	m_uVBRFrames
	VBR frames from the Xing packet.
int	m_iEncodingDelay
	Encoding delay from 0-3000 (or -1 if invalid)
int	m_iEncodingPadding
	Encoding padding from 0-3000 (or -1 if invalid)
uint_t	m_uWhichBuffer
	Which byte stream buffer is active? (0 or 1)
uint_t	m_uSynthBufferOffset
	Synthesizer buffer offset (0-15)
uint_t	m_bVBRHeaderValid
	TRUE if a Variable Bit Rate header was parsed.
uint_t	m_bSideInfoValid
	TRUE if MP3 side information was parsed.
uint_t	m_bDataValid
	TRUE if packet data was found.
uint_t	m_bFreeFrame
	TRUE if in free format mode (Sample rate can change)
uint_t	m_bPreviousFreeFrame
	TRUE if it was free format mode in the last pass.
uint_t	m_uPreviousFramePadding
	Number of bits from the previous frame's padding.
uint_t	m_bBitStreamNotSynced
	TRUE if the bit stream hadn't reached a sync marker.
FrameHeaderExt_t	m_FrameHeaderExt
	Data frame state.
Layer3SideInfo_t	m_Layer3SideInfo
	Side information for Layer 3 decoding.
uint8_t	m_ByteStreamBuffers [2][cMaxFrameSize+1024]
	Internal buffers.
uint_t	m_uHybridBlockIndexes [2]
	Which m_fHybridBlocks tables that are active (2 channels)
float	m_fHybridBlocks [2][2][cSubBandLimit *cSideSampleLimit]
	Buffers for DCT tables.
float	m_fSynthBuffers [2][2][256+16]
	Output buffers for DCT transforms (with 16 entry padding)

Static Public Attributes
static const Burger::StaticRTTI	g_StaticRTTI
	The global description of the class.
static const uint_t	cSubBandLimit = 32
	Number of sub bands.
static const uint_t	cSideSampleLimit = 18
	Number of side samples (Used with sub bands)
static const uint_t	cCBands = 64
	Number of partition bands.
static const uint_t	cDecoderDelay = 528
	Sample delay on decoding.
static const uint_t	cEncoderDelay = 576
	Sample delay on encoding.
static const uint_t	cPostDelay = 1152
	Sample delay for granule encoding.
static const uint_t	cMaxFrameSize = 2880
	Largest allowed frame in samples.
static const uint_t	cMDCTDelay = 48
	Cosine table delay.
static const uint_t	cFFTIndex = cMDCTDelay + 224
	Index into the FFT entry.
static const uint_t	cScaleBlock = 12
	Layer1 / Layer2 scale block.
static const uint32_float_t	g_fDecodeWindow [544]
	MP3 decoding windows table.
static const Layer2_AllocEntry_t *	g_MP3Layer2Entries [5]
	Pointers to the MP3 Layer2 allocation tables.
static const uint8_t	g_HuffLens32 [4 *4]
	Bit lengths for the special case for 32 bits.
static const uint8_t	g_HuffLens33 [4 *4]
	Bit lengths for the 2nd special case.
static const HuffmanCodeHeader_t	g_HuffmanCodeHeaders [34]
	Array of Huffman trees.
static const Layer3Huffman_t	g_MP3CompashHash [2]
	Pointers to compact Huffman hash tables.
static const Layer3Huffman_t	g_MP3LongHash [32]
	Pointers to long Huffman hash tables.
static const uint32_t	g_HuffmanLengthTable16_24 [16 *16]
	Quick lookup for Huffman 16 and 24 bit tables.
static const uint32_t	g_HuffmanLengthTable2_3 [3 *3]
	Quick lookup for Huffman 2 and 3 bit tables.
static const uint32_t	g_HuffmanLengthTable5_6 [4 *4]
	Quick lookup for Huffman 5 and 6 bit tables.
static const uint_t	g_BitrateTables [3][16]
	Expected bit rate for MP3 files.
static const uint16_t	g_DataFrameBitrateTables [2][3][16]
	Bitrate lookup table for the DataFrame_t.
static const uint_t	g_SampleRateTables [3][4]
	Expected sample rate for MP3 files.
static const uint_t	g_SCFSI_BandTable [5] = { 0, 6, 11, 16, 21 }
	SCale Factor Selection Information.
static const uint_t	g_MP3SampleRates [9]
	Table of sample rates supported by MP3.
static const BandInfo_t	g_MP3BandInformation [9]
	Band tables for all levels of MP3 encoding.
static const uint_t	cSizeofBandInfoDiffHashes = 156
	Length of each g_MP3BandInfoDiffHashes table in entries.
static const uint16_t *	g_MP3BandInfoDiffHashes [9]
	Pointers to hash tables to g_MP3BandInformation differences (Long and short)
static const uint_t	cSizeofBandInfoShortDiffHashes = 152
	Length of each g_MP3BandInfoShortDiffHashes table in entries.
static const uint16_t *	g_MP3BandInfoShortDiffHashes [9]
	Pointers to hash tables to g_MP3BandInformation short differences.
static const uint_t	cSizeofBandInfoLongDiffHashes = 44
	Length of each g_MP3BandInfoLongDiffHashes table in entries.
static const uint16_t *	g_MP3BandInfoLongDiffHashes [9]
	Pointers to hash tables to g_MP3BandInformation long differences.
static const uint8_t	g_MP3BandLongLimits [9][23]
static const uint8_t	g_MP3BandShortLimits [9][14]
static const uint8_t	g_GroupTable3 [3][3][3][3]
	MP3 Layer 2 Group table for 3*3*3 granularity.
static const uint8_t	g_GroupTable5 [5][5][5][3]
	MP3 Layer 2 Group table for 5*5*5 granularity.
static const uint8_t	g_GroupTable9 [9][9][9][3]
	MP3 Layer 2 Group table for 9*9*9 granularity.
static const uint32_float_t	g_MP3MulTable64 [27][64]
	MP3 Layer 2 magnitude table.
static const uint32_float_t	g_MP3Power3Div4 [8207]
	Table of pow(i,4/3)
static const uint32_float_t	g_MP3GainPow2 [378]
	MP3 Layer 3 table for pow(2.0,(i-46)*-0.25)
static const uint32_float_t	g_MP3AntiAliasTerms [8 *2]
	MP3 Layer 3 for anti-alias table.
static const uint32_float_t	g_MP3BlockType0 [36]
	MP3 Layer 3 table for block type 0.
static const uint32_float_t	g_MP3BlockType1 [36]
	MP3 Layer 3 table for block type 1.
static const uint32_float_t	g_MP3BlockType2 [12]
	MP3 Layer 3 table for block type 2.
static const uint32_float_t	g_MP3BlockType3 [36]
	MP3 Layer 3 table for block type 3.
static const float *	g_MP3BlockTypes [4]
	MP3 Layer 3 index table for all block types.
static const uint32_float_t	g_MP3PhasedBlockType0 [36]
	MP3 Layer 3 table for phase shifted block type 0.
static const uint32_float_t	g_MP3PhasedBlockType1 [36]
	MP3 Layer 3 table for phase shifted block type 1.
static const uint32_float_t	g_MP3PhasedBlockType2 [12]
	MP3 Layer 3 table for phase shifted block type 2.
static const uint32_float_t	g_MP3PhasedBlockType3 [36]
	MP3 Layer 3 table for phase shifted block type 3.
static const float *	g_MP3PhasedBlockTypes [4]
	MP3 Layer 3 index table for all phased block types.
static const uint32_float_t	g_MP3TanDivTan [16]
	MP3 Layer 3 tangent table for tan((i * BURGER_PI) / 12.0) / (tan((i * BURGER_PI) / 12.0) + 1)
static const uint32_float_t	g_MP3OneDivTan [16]
	MP3 Layer 3 tangent table for 1.0 / (tan((i * BURGER_PI) / 12.0) + 1)
static const uint32_float_t	g_MP3Sqrt2TanDivTan [16]
	MP3 Layer 3 tangent table for sqrt(2) * tan((i * BURGER_PI) / 12.0) / (tan((i * BURGER_PI) / 12.0) + 1)
static const uint32_float_t	g_MP3Sqrt2DivTan [16]
	MP3 Layer 3 tangent table for sqrt(2) / (tan((i * BURGER_PI) / 12.0) + 1)
static const uint32_float_t	g_MP3PowMono1 [2][16]
	MP3 Layer 3 power table1 for mono.
static const uint32_float_t	g_MP3PowMono2 [2][16]
	MP3 Layer 3 power table2 for mono.
static const uint32_float_t	g_MP3PowStereo1 [2][16]
	MP3 Layer 3 power table1 for stereo.
static const uint32_float_t	g_MP3PowStereo2 [2][16]
	MP3 Layer 3 power table2 for stereo.
static const uint32_float_t	g_MP3FFTShortWindow [128]
	MP3 Short Blackman FFT window.
static const uint32_float_t	g_MP3FFTWindow [1024]
	MP3 Blackman FFT window.
static const uint_t	g_MP3IntensitySLen [256]
	MP3 Layer 3 stereo intensity table.
static const uint_t	g_MP3NormalSLen [512]
	MP3 Layer 3 mono intensity table.
static const uint8_t	g_Layer3ScaleFactors1 [2][16]
	Table of bit widths of scale factor indexes.
static const uint8_t	g_Layer3ScaleFactors2 [3][6][4]
	Table of bit widths of scale factor indexes.
static const uint8_t	g_Layer3PresetTables [2][22]
	Table of Huffman presets.
static const int16_t	g_Table [256]
static const uint32_t	Signature = 0x4D503320
	'MP3 '
Static Public Attributes inherited from Burger::DecompressAudio
static const Burger::StaticRTTI	g_StaticRTTI
	The global description of the class.
Static Public Attributes inherited from Burger::Decompress
static const Burger::StaticRTTI	g_StaticRTTI
	The global description of the class.
Static Public Attributes inherited from Burger::Base
static const Burger::StaticRTTI	g_StaticRTTI
	The global description of the class.

Protected Types
enum	eState { STATE_INIT , STATE_CACHEFULL }

Protected Attributes
uint_t	m_uCacheSize
	Number of valid bytes in m_uCache.
eState	m_eState
	State of the decompression.
int16_t	m_iCache
	Temp uncompressed data buffer.
Protected Attributes inherited from Burger::DecompressAudio
SoundManager::eDataType	m_eDataType
	Data type the decompresser will create.
uint_t	m_bStereo
	TRUE if data is stereo
Protected Attributes inherited from Burger::Decompress
uintptr_t	m_uTotalInput
	Total number of bytes processed for input.
uintptr_t	m_uTotalOutput
	Total number of bytes processed for output.
uintptr_t	m_uInputLength
	Number of input bytes processed from the last call to Process()
uintptr_t	m_uOutputLength
	Number of output bytes processed from the last call to Process()
uint32_t	m_uSignature
	4 character code to identify this decompresser

Private Member Functions
	DecompressMP3 (const DecompressMP3 &)=delete
DecompressMP3 &	operator= (const DecompressMP3 &)=delete
	DecompressMP3 (DecompressMP3 &&)=delete
DecompressMP3 &	operator= (DecompressMP3 &&)=delete

Additional Inherited Members
Protected Member Functions inherited from Burger::DecompressAudio
	DecompressAudio (SoundManager::eDataType uDataType)
	Constructor.

Detailed Description

Process audio data compressed with MP3.

---

Convert audio data compressed with MP3 to native 16 bit format

See also

Decompress and DecompressAudio

Member Enumeration Documentation

eGranuleBlockType

enum Burger::DecompressMP3::eGranuleBlockType

Enumerator
BLOCK_TYPE_NORM	Granule Block type. Forbidden window type
BLOCK_TYPE_START	Start window type.
BLOCK_TYPE_SHORT	3 short windows
BLOCK_TYPE_STOP	End window.

eMPEGAudioVersionID

enum Burger::DecompressMP3::eMPEGAudioVersionID

Enumerator
MPEG_VERSION_2_5	MPEG Version 2.5 (later extension of MPEG 2)
MPEG_VERSION_RESERVED	Not used (Illegal value if detected)
MPEG_VERSION_2	MPEG Version 2 (ISO/IEC 13818-3)
MPEG_VERSION_1	MPEG Version 1 (ISO/IEC 11172-3)

eMPEGChannelMode

enum Burger::DecompressMP3::eMPEGChannelMode

Enumerator
MPEG_MODE_STEREO	Stereo (Spatially separate)
MPEG_MODE_JOINT_STEREO	Joint stereo (Stereo with shared audio)
MPEG_MODE_DUAL_CHANNEL	Dual channel (2 independent channels)
MPEG_MODE_MONO	Single channel (Mono)
MPEG_MODE_UNKNOWN	Unknown mode (Invalid internal value)

eMPEGEmphasis

enum Burger::DecompressMP3::eMPEGEmphasis

Enumerator
MPEG_EMP_NONE	No equalization.
MPEG_EMP_50_15MS	Apply a 50/15 ms equalization.
MPEG_EMP_RESERVED	Not used (Illegal value if detected)
MPEG_EMP_CCITJ17	Apply noise suppression.

eMPEGLayerDescription

enum Burger::DecompressMP3::eMPEGLayerDescription

Enumerator
MPEG_LAYER_RESERVED	Not used (Illegal value if detected)
MPEG_LAYER_3	Layer 3.
MPEG_LAYER_2	Layer 2.
MPEG_LAYER_1	Layer 1.

eMPEGModeExtension

enum Burger::DecompressMP3::eMPEGModeExtension

Enumerator
MPEG_MODEEXT_LR_LR	Left/Right Stereo, Left/Right Stereo.
MPEG_MODEEXT_LR_I	Left/Right Stereo, Intensity stereo.
MPEG_MODEEXT_MS_LR	Mid/Side Stereo, Left/Right Stereo.
MPEG_MODEEXT_MS_I	Mid/Side Stereo, Intensity stereo.

eState

enum Burger::DecompressMP3::eState

protected

Enumerator
STATE_INIT	Basic state.
STATE_CACHEFULL	Cache is full, need to output before more input.

Constructor & Destructor Documentation

DecompressMP3() [1/3]

Burger::DecompressMP3::DecompressMP3 ( const DecompressMP3 & )

privatedelete

DecompressMP3() [2/3]

Burger::DecompressMP3::DecompressMP3 ( DecompressMP3 && )

privatedelete

DecompressMP3() [3/3]

Burger::DecompressMP3::DecompressMP3

(

)

Default constructor.

---

Initializes the defaults

~DecompressMP3()

Burger::DecompressMP3::~DecompressMP3 ( )

virtual

Default destructor.

---

Dispose all data

Member Function Documentation

AddChunk()

Burger::DecompressMP3::Chunk_t *BURGER_API Burger::DecompressMP3::AddChunk	(	const uint8_t *	pData,
		uintptr_t	uSize )

Add a new data chunk into the linked list.

---

Delete the last chunk in the internal buffer linked list

AudioDataPrecedesFrame()

int BURGER_API Burger::DecompressMP3::AudioDataPrecedesFrame

(

void

)

const

Determine how many bytes to backtrack to next frame.

---

This function works on all layers. If layer 1 or 2, it will return 0, on layer 3 it will return the frame count to backtrack

Returns

Number of frames to backtrack

See also

Layer3AudioDataPrecedesFrame(void) const

Decode() [1/2]

Burger::eError BURGER_API Burger::DecompressMP3::Decode	(	float *	pOutput,
		uintptr_t	uOutputSize,
		const uint8_t *	pInput,
		uintptr_t	uInputSize,
		uintptr_t *	pProcessed )

Decode MP3 data.

---

Workhorse function, call with input data and continuously call this function until OK is returned alerting the calling function that the decoding is complete

This function will create 32 bit floating point output

Parameters

pOutput	Pointer to a buffer for the decompressed audio data
uOutputSize	Number of bytes in the output buffer, must be at least 1152 * 2 * sizeof(int16_t)
pInput	Pointer to the input data
uInputSize	Number of bytes in the input data
pProcessed	Pointer to a variable to receive the number of bytes placed in the output buffer

Returns

Error code

See also

Decode(int16_t *,uintptr_t,const uint8_t *,uintptr_t,uintptr_t *)

Decode() [2/2]

Burger::eError BURGER_API Burger::DecompressMP3::Decode	(	int16_t *	pOutput,
		uintptr_t	uOutputSize,
		const uint8_t *	pInput,
		uintptr_t	uInputSize,
		uintptr_t *	pProcessed )

Decode MP3 data.

---

Workhorse function, call with input data and continuously call this function until OK is returned alerting the calling function that the decoding is complete

This function will create 16 bit integer output

Parameters

pOutput	Pointer to a buffer for the decompressed audio data
uOutputSize	Number of bytes in the output buffer, must be at least 1152 * 2 * sizeof(int16_t)
pInput	Pointer to the input data
uInputSize	Number of bytes in the input data
pProcessed	Pointer to a variable to receive the number of bytes placed in the output buffer

Returns

Error code

See also

Decode(float *,uintptr_t,const uint8_t *,uintptr_t,uintptr_t *)

ExtractXingHeader()

uint_t BURGER_API Burger::DecompressMP3::ExtractXingHeader

(

uintptr_t

uSkipAhead

)

Extract data from the Xing chunk.

---

Scan the packet and locate a Xing chunk and if one is found, parse it but don't update the data chunk pointer.

Parameters

uSkipAhead

Number of bytes to "skip ahead" before parsing the Xing record

Returns

The number of bytes that the header needed or 0 if there is no Xing record

get_StaticRTTI()

const Burger::StaticRTTI * Burger::DecompressMP3::get_StaticRTTI ( void ) const

overridevirtualnoexcept

Get the description to the class.

---

This virtual function will pull the pointer to the StaticRTTI instance that has the name of the class. Due to it being virtual, it will be the name of the most derived class.

Returns

Pointer to a global, read only instance of StaticRTTI for the true class

Reimplemented from Burger::DecompressAudio.

GetBit()

uint_t BURGER_API Burger::DecompressMP3::GetBit

(

void

)

Fetch a single bit from the m_pWorkPointer stream.

---

Returns

Next bit in the stream

GetBits()

uint_t BURGER_API Burger::DecompressMP3::GetBits

(

uint_t

uBitCount

)

Fetch a stream of bits from the bit stream.

---

Given a bit count of 0 to 16, fetch that number of bits from the bit stream

Parameters

uBitCount

Number of bits to fetch (0 - 16)

Returns

Value fetched from the stream or 0 if stream is empty or uBitCount is 0

GetByte()

uint_t BURGER_API Burger::DecompressMP3::GetByte

(

void

)

Fetch a byte from the chunk stream.

---

Returns

Next byte in the stream, zero if the stream is empty

GetBytesFromChunks()

void BURGER_API Burger::DecompressMP3::GetBytesFromChunks

(

uintptr_t

uSize

)

Copy data from the chunk list into the bit stream.

---

Parameters

uSize

Number of bytes to copy from the chunks

GetMP3Header()

void BURGER_API Burger::DecompressMP3::GetMP3Header

(

void

)

Fetch the 32 bit MP3 header from the chunk stream.

---

Layer3AudioDataPrecedesFrame()

int BURGER_API Burger::DecompressMP3::Layer3AudioDataPrecedesFrame

(

void

)

const

Determine how many bytes to backtrack to next frame.

---

This is an MP3 Layer 3 function. On Layer 1 or 2 files, it will return invalid values.

Returns

Number of frames to backtrack

See also

AudioDataPrecedesFrame(void) const

Layer3DecodeFrame() [1/2]

uintptr_t BURGER_API Burger::DecompressMP3::Layer3DecodeFrame	(	float *	pOutput,
		uintptr_t	uOffset )

Process a frame of Layer 3 data into 64 samples.

---

Process a single MP3 frame and output 32 stereo 32 bit floating point samples

Parameters

pOutput	Pointer to a buffer of 64 samples (32 stereo samples)
uOffset	Offset from the pointer (Actual buffer is pOutput+uOffset)

Returns

Number of bytes output

See also

Layer3DecodeFrame(int16_t *,uintptr_t)

Layer3DecodeFrame() [2/2]

uintptr_t BURGER_API Burger::DecompressMP3::Layer3DecodeFrame	(	int16_t *	pOutput,
		uintptr_t	uOffset )

Process a frame of Layer 3 data into 64 samples.

---

Process a single MP3 frame and output 32 stereo 16 bit signed samples

Parameters

pOutput	Pointer to a buffer of 64 samples (32 stereo samples)
uOffset	Offset from the pointer (Actual buffer is pOutput+uOffset)

Returns

Number of bytes output

See also

Layer3DecodeFrame(float *,uintptr_t)

Layer3Dequantize()

uint_t BURGER_API Burger::DecompressMP3::Layer3Dequantize	(	float *	pHybridBuffer,
		const uint_t *	pScaleFactorIndexes,
		GranuleInfo_t *	pGranuleInfo,
		uint_t	uSampleRateIndex,
		uint_t	uBitsPreviouslyParsed )

dequantize the Hybrid buffer

---

Using a Huffman tree, extract data and create the hybrid buffer.

Parameters

pHybridBuffer	Pointer to an uninitialized buffer that's cSubBandLimit*cSideSampleLimit in size
pScaleFactorIndexes	Pointer to the scale factor indexes
pGranuleInfo	Pointer to the GranuleInfo_t describing how to parse the stream
uSampleRateIndex	Sample rate index for selecting the Huffman tree
uBitsPreviouslyParsed	Number of bit processed in the packet before this function was called

Returns

Zero if no error, non-zero if there's a buffer starvation or other error

Layer3GetScaleFactors1()

uint_t BURGER_API Burger::DecompressMP3::Layer3GetScaleFactors1	(	uint_t *	pScaleFactorIndexes,
		const GranuleInfo_t *	pGranuleInfo )

Parse scale factor indexes for MPeg 1.0.

---

Read from the bit stream the scale factor index table

Parameters

pScaleFactorIndexes	Pointer to a buffer of at least 39 entries to store the indexes
pGranuleInfo	Pointer to the GranuleInfo_t describing how to parse the stream

Returns

Number of bits parsed

See also

Layer3GetScaleFactors2(uint_t *,GranuleInfo_t *,uint_t)

Layer3GetScaleFactors2()

uint_t BURGER_API Burger::DecompressMP3::Layer3GetScaleFactors2	(	uint_t *	pScaleFactorIndexes,
		GranuleInfo_t *	pGranuleInfo,
		uint_t	bStereo )

Parse scale factor indexes for MPeg 2.0 or 2.5.

---

Read from the bit stream the scale factor index table

Parameters

pScaleFactorIndexes	Pointer to a buffer of at least 39 entries to store the indexes
pGranuleInfo	Pointer to the GranuleInfo_t describing how to parse the stream
bStereo	FALSE if mono, any other value for stereo parsing

Returns

Number of bits parsed

See also

Layer3GetScaleFactors1(uint_t *,GranuleInfo_t *)

Layer3GetSideInfo()

int BURGER_API Burger::DecompressMP3::Layer3GetSideInfo

(

void

)

Parse Side information.

---

Docs in mp3_theory.pdf section 5.1.2 Side Information

Returns

Actual number of bits needed to parse the frame, if negative the buffer has all the data needed

Layer3GetSideInfoType1()

void BURGER_API Burger::DecompressMP3::Layer3GetSideInfoType1	(	uint_t	uChannelCount,
		uint_t	bMSStereo,
		uint_t	uSampleRateIndex )

Parse Side information for Layer 1 Docs in mp3_theory.pdf section 5.1.2 Side Information.

---

Parameters

uChannelCount	1 for mono, 2 for stereo
bMSStereo	TRUE if parsing MS Stereo
uSampleRateIndex	Sample rate index value

Layer3GetSideInfoType2()

void BURGER_API Burger::DecompressMP3::Layer3GetSideInfoType2	(	uint_t	uChannelCount,
		uint_t	bMSStereo,
		uint_t	uSampleRateIndex )

Parse Side information for Layer 2 or 3.

---

Docs in mp3_theory.pdf section 5.1.2 Side Information

Parameters

uChannelCount	1 for mono, 2 for stereo
bMSStereo	TRUE if parsing MS Stereo
uSampleRateIndex	Sample rate index value

Layer3ProcessHybridBuffer()

void BURGER_API Burger::DecompressMP3::Layer3ProcessHybridBuffer	(	float *	pHybridInput,
		float *	pHybridOutput,
		uint_t	uChannel,
		const GranuleInfo_t *	pGranuleInfo )

Process the hybrid buffers.

---

Perform the magic! Invoke DCT functions onto the hybrid buffers to set up for audio sample generations.

Parameters

pHybridInput	Input hybrid buffer
pHybridOutput	Output hybrid buffer
uChannel	Which audio channel (0 or 1)
pGranuleInfo	Pointer to a granule record for this packet

New()

Burger::DecompressMP3 *BURGER_API Burger::DecompressMP3::New ( void )

static

Allocate and initialize a DecompressMP3.

---

Returns

A pointer to a default DecompressMP3 class or NULL if out of memory

See also

Delete(const T *)

operator=() [1/2]

DecompressMP3 & Burger::DecompressMP3::operator= ( const DecompressMP3 & )

privatedelete

operator=() [2/2]

DecompressMP3 & Burger::DecompressMP3::operator= ( DecompressMP3 && )

privatedelete

Process()

Burger::eError Burger::DecompressMP3::Process ( void * pOutput, uintptr_t uOutputChunkLength, const void * pInput, uintptr_t uInputChunkLength )

overridevirtual

Decompress audio data using alaw.

---

Input data is assumed to be alaw compressed bytes.

Parameters

pOutput	Pointer to the buffer to accept the decompressed data
uOutputChunkLength	Number of bytes in the output buffer
pInput	Pointer to data to decompress
uInputChunkLength	Number of bytes in the data to decompress

Returns

Decompress::eError code with zero if no failure, non-zero is an error code

Implements Burger::Decompress.

ProcessMonoSamples() [1/2]

uintptr_t BURGER_API Burger::DecompressMP3::ProcessMonoSamples	(	float *	pOutput,
		uintptr_t	uOffset,
		const float *	pBand )

Create samples from audio band information (Mono)

---

Given the floats that describe the audio band frequencies, generate the next 32 entries of output sound.

This code is optimized to store audio data in 32 bit floating point format, used by most modern audio hardware.

Parameters

pOutput	Pointer a buffer of 32 entries for audio data
uOffset	Offset to the pOutput buffer to write to in bytes
pBand	Pointer to FFT table

Returns

uOffset + (32*sizeof(float))

ProcessMonoSamples() [2/2]

uintptr_t BURGER_API Burger::DecompressMP3::ProcessMonoSamples	(	int16_t *	pOutput,
		uintptr_t	uOffset,
		const float *	pBand )

Create samples from audio band information (Mono)

---

Given the floats that describe the audio band frequencies, generate the next 32 entries of output sound.

This code is optimized to store audio data in 16 bit signed integer format, used by most older audio hardware.

Parameters

pOutput	Pointer a buffer of 32 entries for audio data
uOffset	Offset to the pOutput buffer to write to in bytes
pBand	Pointer to FFT table

Returns

uOffset + (32*sizeof(int16_t))

ProcessStereoSamples() [1/2]

uintptr_t BURGER_API Burger::DecompressMP3::ProcessStereoSamples	(	float *	pOutput,
		uintptr_t	uOffset,
		uint_t	uChannel,
		const float *	pBand )

Create samples from audio band information (Stereo)

---

Given the floats that describe the audio band frequencies, generate the next 32 entries of output sound for one channel of interleaved stereo data. The output buffer must be 64 entries in size with every other value being written.

This code is optimized to store audio data in 32 bit floating point format, used by most modern audio hardware.

Parameters

pOutput	Pointer a buffer of 64 entries (32 left, 32 right)
uOffset	Offset to the pOutput buffer to write to in bytes
uChannel	0 for even entries, 1 for odd entries
pBand	Pointer to FFT table

Returns

uOffset + (64*sizeof(float))

ProcessStereoSamples() [2/2]

uintptr_t BURGER_API Burger::DecompressMP3::ProcessStereoSamples	(	int16_t *	pOutput,
		uintptr_t	uOffset,
		uint_t	uChannel,
		const float *	pBand )

Create samples from audio band information (Stereo)

---

Given the floats that describe the audio band frequencies, generate the next 32 entries of output sound for one channel of interleaved stereo data. The output buffer must be 64 entries in size with every other value being written.

This code is optimized to store audio data in 16 bit signed integer format, used by most older audio hardware.

Parameters

pOutput	Pointer a buffer of 64 entries (32 left, 32 right)
uOffset	Offset to the pOutput buffer to write to in bytes
uChannel	0 for even entries, 1 for odd entries
pBand	Pointer to FFT table

Returns

uOffset + (64*sizeof(int16_t))

RemoveAllChunks()

void BURGER_API Burger::DecompressMP3::RemoveAllChunks

(

void

)

Dispose of all of the data chunks.

---

Delete all data chunks

RemoveLastChunk()

void BURGER_API Burger::DecompressMP3::RemoveLastChunk

(

void

)

Dispose of the last data chunk.

---

Delete the last chunk in the internal buffer linked list

Reset()

Burger::eError Burger::DecompressMP3::Reset ( void )

overridevirtual

Resets the decompresser to defaults.

---

Returns

kErrorNone if successful

Implements Burger::Decompress.

ScanForFramePacket()

uintptr_t BURGER_API Burger::DecompressMP3::ScanForFramePacket

(

uint_t

bFreeMatchMode

)

const

Scan ahead for an MP3 frame packet.

---

Scan ahead byte by byte until a packet ID is found and return the number of bytes to skip to get to the packet. If no packet was found, return -1

Parameters

bFreeMatchMode

If TRUE, look for packets that match the currently parsed sample rate and layer

Returns

-1 if a packet isn't found or the number of bytes to skip to get to the packet (Can be zero)

SeekBuffer()

uint_t BURGER_API Burger::DecompressMP3::SeekBuffer

(

uintptr_t

uNegativeOffset

)

Update the internal buffer.

---

If uNegativeOffset is non-zero, grab that many bytes from the previous data stream and apply it to the current stream

Returns

Next bit in the stream

Member Data Documentation

cCBands

const uint_t Burger::DecompressMP3::cCBands = 64

static

Number of partition bands.

cDecoderDelay

const uint_t Burger::DecompressMP3::cDecoderDelay = 528

static

Sample delay on decoding.

cEncoderDelay

const uint_t Burger::DecompressMP3::cEncoderDelay = 576

static

Sample delay on encoding.

cFFTIndex

const uint_t Burger::DecompressMP3::cFFTIndex = cMDCTDelay + 224

static

Index into the FFT entry.

cMaxFrameSize

const uint_t Burger::DecompressMP3::cMaxFrameSize = 2880

static

Largest allowed frame in samples.

cMDCTDelay

const uint_t Burger::DecompressMP3::cMDCTDelay = 48

static

Cosine table delay.

cPostDelay

const uint_t Burger::DecompressMP3::cPostDelay = 1152

static

Sample delay for granule encoding.

cScaleBlock

const uint_t Burger::DecompressMP3::cScaleBlock = 12

static

Layer1 / Layer2 scale block.

cSideSampleLimit

const uint_t Burger::DecompressMP3::cSideSampleLimit = 18

static

Number of side samples (Used with sub bands)

cSizeofBandInfoDiffHashes

const uint_t Burger::DecompressMP3::cSizeofBandInfoDiffHashes = 156

static

Length of each g_MP3BandInfoDiffHashes table in entries.

cSizeofBandInfoLongDiffHashes

const uint_t Burger::DecompressMP3::cSizeofBandInfoLongDiffHashes = 44

static

Length of each g_MP3BandInfoLongDiffHashes table in entries.

cSizeofBandInfoShortDiffHashes

const uint_t Burger::DecompressMP3::cSizeofBandInfoShortDiffHashes = 152

static

Length of each g_MP3BandInfoShortDiffHashes table in entries.

cSubBandLimit

const uint_t Burger::DecompressMP3::cSubBandLimit = 32

static

Number of sub bands.

g_BitrateTables

const uint_t Burger::DecompressMP3::g_BitrateTables

static

Initial value:

= {
 {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,BURGER_MAXUINT}, 
 {0,32,40,48,56,64,80,96,112,128,160,192,224,256,320,BURGER_MAXUINT}, 
 {0,8,16,24,32,40,48,56,64,BURGER_MAXUINT,BURGER_MAXUINT,BURGER_MAXUINT,BURGER_MAXUINT,BURGER_MAXUINT,BURGER_MAXUINT,BURGER_MAXUINT} 
}

Expected bit rate for MP3 files.

---

The first index is which type of MP3 file is being looked up and the second index with the bit rate constant.

The order is MPEG_VERSION_2, MPEG_VERSION_1, Special

g_DataFrameBitrateTables

const uint16_t Burger::DecompressMP3::g_DataFrameBitrateTables

static

Initial value:

= {
{
 {0,32,64,96,128,160,192,224,256,288,320,352,384,416,448}, 
 {0,32,48,56,64,80,96,112,128,160,192,224,256,320,384}, 
 {0,32,40,48,56,64,80,96,112,128,160,192,224,256,320} 
},{
 {0,32,48,56,64,80,96,112,128,144,160,176,192,224,256}, 
 {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160}, 
 {0,8,16,24,32,40,48,56,64,80,96,112,128,144,160} 
}}

Bitrate lookup table for the DataFrame_t.

---

Values stolen from this web page section E https://www.mp3-tech.org/programmer/frame_header.html

g_fDecodeWindow

const Burger::uint32_float_t Burger::DecompressMP3::g_fDecodeWindow

static

MP3 decoding windows table.

---

512 + 32 entries of the decode window scaled to 32767.0f so it's used to scale to 16 bit integer output

g_GroupTable3

const uint8_t Burger::DecompressMP3::g_GroupTable3

static

Initial value:

= {
{
 {{1,1,1},{0,1,1},{2,1,1}},
 {{1,0,1},{0,0,1},{2,0,1}},
 {{1,2,1},{0,2,1},{2,2,1}}
},{
 {{1,1,0},{0,1,0},{2,1,0}},
 {{1,0,0},{0,0,0},{2,0,0}},
 {{1,2,0},{0,2,0},{2,2,0}}
},{
 {{1,1,2},{0,1,2},{2,1,2}},
 {{1,0,2},{0,0,2},{2,0,2}},
 {{1,2,2},{0,2,2},{2,2,2}}
}}

MP3 Layer 2 Group table for 3*3*3 granularity.

---

g_GroupTable5

const uint8_t Burger::DecompressMP3::g_GroupTable5

static

MP3 Layer 2 Group table for 5*5*5 granularity.

---

g_GroupTable9

const uint8_t Burger::DecompressMP3::g_GroupTable9

static

MP3 Layer 2 Group table for 9*9*9 granularity.

---

g_HuffLens32

const uint8_t Burger::DecompressMP3::g_HuffLens32

static

Initial value:

= {
 1 + 0, 4 + 1, 4 + 1, 5 + 2,
 4 + 1, 6 + 2, 5 + 2, 6 + 3,
 4 + 1, 5 + 2, 5 + 2, 6 + 3,
 5 + 2, 6 + 3, 6 + 3, 6 + 4
}

Bit lengths for the special case for 32 bits.

---

g_HuffLens33

const uint8_t Burger::DecompressMP3::g_HuffLens33

static

Initial value:

= {
 4 + 0, 4 + 1, 4 + 1, 4 + 2, 
 4 + 1, 4 + 2, 4 + 2, 4 + 3,
 4 + 1, 4 + 2, 4 + 2, 4 + 3, 
 4 + 2, 4 + 3, 4 + 3, 4 + 4
}

Bit lengths for the 2nd special case.

---

g_HuffmanCodeHeaders

const Burger::DecompressMP3::HuffmanCodeHeader_t Burger::DecompressMP3::g_HuffmanCodeHeaders

static

Array of Huffman trees.

---

Array of pointers to all of the Huffman tree tables balanced for MP3 decoding

g_HuffmanLengthTable16_24

const uint32_t Burger::DecompressMP3::g_HuffmanLengthTable16_24

static

Quick lookup for Huffman 16 and 24 bit tables.

---

Quick lookup table for the lengths of the 16 bit and the 24 bit tables with the 16 bit entry in the upper 16 bits and the 24 table length in the lower 16 bits. 32 bit integers are used for byte storage so addition can be performed as a 2 entry vector of 2 shorts in an integer

g_HuffmanLengthTable2_3

const uint32_t Burger::DecompressMP3::g_HuffmanLengthTable2_3

static

Initial value:

= {
 0x010002, 0x040003, 0x070007,
 0x040004, 0x050004, 0x070007,
 0x060006, 0x070007, 0x080008
}

Quick lookup for Huffman 2 and 3 bit tables.

---

Quick lookup table for the lengths of the 2 bit and the 3 bit tables with the 2 bit entry in the upper 16 bits and the 3 table length in the lower 16 bits. 32 bit integers are used for byte storage so addition can be performed as a 2 entry vector of 2 shorts in an integer

g_HuffmanLengthTable5_6

const uint32_t Burger::DecompressMP3::g_HuffmanLengthTable5_6

static

Initial value:

= {
 0x010003, 0x040004, 0x070006, 0x080008, 0x040004, 0x050004, 0x080006, 0x090007,
 0x070005, 0x080006, 0x090007, 0x0a0008, 0x080007, 0x080007, 0x090008, 0x0a0009
}

Quick lookup for Huffman 5 and 6 bit tables.

---

Quick lookup table for the lengths of the 5 bit and the 6 bit tables with the 5 bit entry in the upper 16 bits and the 6 table length in the lower 16 bits. 32 bit integers are used for byte storage so addition can be performed as a 2 entry vector of 2 shorts in an integer

g_Layer3PresetTables

const uint8_t Burger::DecompressMP3::g_Layer3PresetTables

static

Initial value:

= {
 {0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,3,3,3,2,0},
 {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
}

Table of Huffman presets.

---

See also

Layer3Dequantize(float *,const uint_t *,GranuleInfo_t ,uint_t,uint_t)

g_Layer3ScaleFactors1

const uint8_t Burger::DecompressMP3::g_Layer3ScaleFactors1

static

Initial value:

= {
 {0,0,0,0,3,1,1,1,2,2,2,3,3,3,4,4},
 {0,1,2,3,0,1,2,3,1,2,3,1,2,3,2,3}
}

Table of bit widths of scale factor indexes.

---

See also

Layer3GetScaleFactors1(uint_t *,const GranuleInfo_t *)

g_Layer3ScaleFactors2

const uint8_t Burger::DecompressMP3::g_Layer3ScaleFactors2

static

Initial value:

= {
 {{6,5,5,5},{6,5, 7,3},{11,10,0,0},{ 7, 7, 7,0},{ 6, 6,6,3},{ 8, 8,5,0}},
 {{9,9,9,9},{9,9,12,6},{18,18,0,0},{12,12,12,0},{12, 9,9,6},{15,12,9,0}},
 {{6,9,9,9},{6,9,12,6},{15,18,0,0},{ 6,15,12,0},{ 6,12,9,6},{ 6,18,9,0}} 
}

Table of bit widths of scale factor indexes.

---

See also

Layer3GetScaleFactors2(uint_t *,GranuleInfo_t *,uint_t)

g_MP3AntiAliasTerms

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3AntiAliasTerms

static

Initial value:

= {
 {0x3F5B84A8},{0x3F61B9D8},{0x3F731ADD},{0x3F7BBA81},{0x3F7EDA41},{0x3F7FC8FD},{0x3F7FF965},{0x3F7FFF8D},
 {0xBF03B5FE},{0xBEF186DA},{0xBEA07302},{0xBE3A4774},{0xBDC1B01D},{0xBD27CB87},{0xBC68A11D},{0xBB727B46}
}

MP3 Layer 3 for anti-alias table.

---

The first 8 terms are 1.0 / sqrt(1.0 + value*value) The second 8 terms are value / sqrt(1.0 + value*value)

g_MP3BandInfoDiffHashes

const uint16_t * Burger::DecompressMP3::g_MP3BandInfoDiffHashes

static

Initial value:

= {
 g_MP3BandInfoDiffHash0,g_MP3BandInfoDiffHash1,g_MP3BandInfoDiffHash2,g_MP3BandInfoDiffHash3,
 g_MP3BandInfoDiffHash4,g_MP3BandInfoDiffHash5,g_MP3BandInfoDiffHash6,g_MP3BandInfoDiffHash7,
 g_MP3BandInfoDiffHash8
}

Pointers to hash tables to g_MP3BandInformation differences (Long and short)

---

g_MP3BandInfoLongDiffHashes

const uint16_t * Burger::DecompressMP3::g_MP3BandInfoLongDiffHashes

static

Initial value:

= {
 g_MP3BandInfoLongDiffHash0,g_MP3BandInfoLongDiffHash1,g_MP3BandInfoLongDiffHash2,g_MP3BandInfoLongDiffHash3,
 g_MP3BandInfoLongDiffHash4,g_MP3BandInfoLongDiffHash5,g_MP3BandInfoLongDiffHash6,g_MP3BandInfoLongDiffHash7,
 g_MP3BandInfoLongDiffHash8
}

Pointers to hash tables to g_MP3BandInformation long differences.

---

g_MP3BandInformation

const Burger::DecompressMP3::BandInfo_t Burger::DecompressMP3::g_MP3BandInformation

static

Band tables for all levels of MP3 encoding.

---

g_MP3BandInfoShortDiffHashes

const uint16_t * Burger::DecompressMP3::g_MP3BandInfoShortDiffHashes

static

Initial value:

= {
 g_MP3BandInfoShortDiffHash0,g_MP3BandInfoShortDiffHash1,g_MP3BandInfoShortDiffHash2,g_MP3BandInfoShortDiffHash3,
 g_MP3BandInfoShortDiffHash4,g_MP3BandInfoShortDiffHash5,g_MP3BandInfoShortDiffHash6,g_MP3BandInfoShortDiffHash7,
 g_MP3BandInfoShortDiffHash8
}

Pointers to hash tables to g_MP3BandInformation short differences.

---

g_MP3BandLongLimits

const uint8_t Burger::DecompressMP3::g_MP3BandLongLimits

static

Initial value:

= {
 {1,1,1,2,2,2,2,3,3,3,4,4,5,6,7,8,10,12,14,17,20,24,32},
 {1,1,1,2,2,2,2,3,3,3,4,4,5,6,7,8,10,11,14,16,19,22,32},
 {1,1,1,2,2,2,2,3,3,3,4,5,5,7,8,10,12,14,17,21,26,31,32},
 {1,1,2,2,2,3,3,3,4,5,5,6,7,9,10,12,14,17,20,23,27,30,32},
 {1,1,2,2,2,3,3,3,4,5,5,6,7,8,10,12,14,16,19,23,27,31,32},
 {1,1,2,2,2,3,3,3,4,5,5,6,7,9,10,12,14,17,20,23,27,30,32},
 {1,1,2,2,2,3,3,3,4,5,5,6,7,9,10,12,14,17,20,23,27,30,32},
 {1,1,2,2,2,3,3,3,4,5,5,6,7,9,10,12,14,17,20,23,27,30,32},
 {1,2,2,3,4,4,5,6,7,8,10,12,14,16,20,23,27,32,32,32,32,32,32}
}

g_MP3BandShortLimits

const uint8_t Burger::DecompressMP3::g_MP3BandShortLimits

static

Initial value:

= {
 {1,1,2,2,3,4,5,7,9,11,14,18,23,32},
 {1,1,2,2,3,4,5,7,9,11,14,17,21,32},
 {1,1,2,2,3,4,5,7,10,13,18,23,30,32},
 {1,1,2,2,3,4,6,7,10,13,17,22,29,32},
 {1,1,2,2,3,5,6,8,11,14,18,23,30,32},
 {1,1,2,2,3,5,6,8,11,14,18,23,29,32},
 {1,1,2,2,3,5,6,8,11,14,18,23,29,32},
 {1,1,2,2,3,5,6,8,11,14,18,23,29,32},
 {1,2,3,4,6,9,12,16,21,27,27,28,28,32}
}

g_MP3BlockType0

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3BlockType0

static

Initial value:

= {
 {0x3D043A95},{0x3DDB8F02},{0x3E4E3F8B},{0x3EA6B730},{0x3F000000},{0x3F448CE2},
 {0x3F9EE064},{0x40153EB0},{0x40F7D015},{0xC107385A},{0xC0427FED},{0xBFF962DE},
 {0xBFBCC8EB},{0xBF9A827A},{0xBF843046},{0xBF6894D6},{0xBF5076D3},{0xBF3D489D},
 {0xBF2D724E},{0xBF1FF5CE},{0xBF142BB2},{0xBF09A043},{0xBF000000},{0xBEEE1832},
 {0xBEDD267E},{0xBECCD9DA},{0xBEBCEC3D},{0xBEAD1DA9},{0xBE9D300C},{0xBE8CE369},
 {0xBE77E369},{0xBE5413CD},{0xBE2D92C2},{0xBE036505},{0xBDA87927},{0xBCF254B0}
}

MP3 Layer 3 table for block type 0.

---

g_MP3BlockType1

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3BlockType1

static

Initial value:

= {
 {0x3D043A95},{0x3DDB8F02},{0x3E4E3F8B},{0x3EA6B730},{0x3F000000},{0x3F448CE2},
 {0x3F9EE064},{0x40153EB0},{0x40F7D015},{0xC107385A},{0xC0427FED},{0xBFF962DE},
 {0xBFBCC8EB},{0xBF9A827A},{0xBF843046},{0xBF6894D6},{0xBF5076D3},{0xBF3D489D},
 {0xBF2D9C9B},{0xBF215729},{0xBF17C4A9},{0xBF104E0D},{0xBF0A8BD4},{0xBF063634},
 {0xBF01FC73},{0xBEEE8DD4},{0xBECB4ABD},{0xBE9BFDCC},{0xBE459FE7},{0xBD88E76C},
 {0x00000000},{0x00000000},{0x00000000},{0x00000000},{0x00000000},{0x00000000}
}

MP3 Layer 3 table for block type 1.

---

g_MP3BlockType2

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3BlockType2

static

Initial value:

= {
 {0x3DDB8F02},{0x3F000000},{0x40153EB0},{0xC0427FED},{0xBF9A827A},{0xBF5076D3},
 {0xBF1FF5CE},{0xBF000000},{0xBECCD9DA},{0xBE9D300C},{0xBE5413CD},{0xBDA87927}
}

MP3 Layer 3 table for block type 2.

---

g_MP3BlockType3

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3BlockType3

static

Initial value:

= {
 {0x00000000},{0x00000000},{0x00000000},{0x00000000},{0x00000000},{0x00000000},
 {0x3E9A622D},{0x3FBBA375},{0x40DF4CA5},{0xC1118135},{0xC0627FED},{0xC0129517},
 {0xBFD4D526},{0xBFA73D75},{0xBF8A9A83},{0xBF6E3A75},{0xBF524353},{0xBF3D76C6},
 {0xBF2D724E},{0xBF1FF5CE},{0xBF142BB2},{0xBF09A043},{0xBF000000},{0xBEEE1832},
 {0xBEDD267E},{0xBECCD9DA},{0xBEBCEC3D},{0xBEAD1DA9},{0xBE9D300C},{0xBE8CE369},
 {0xBE77E369},{0xBE5413CD},{0xBE2D92C2},{0xBE036505},{0xBDA87927},{0xBCF254B0}
}

MP3 Layer 3 table for block type 3.

---

g_MP3BlockTypes

const float * Burger::DecompressMP3::g_MP3BlockTypes

static

Initial value:

= { 
 &Burger::DecompressMP3::g_MP3BlockType0->f,
 &Burger::DecompressMP3::g_MP3BlockType1->f,
 &Burger::DecompressMP3::g_MP3BlockType2->f,
 &Burger::DecompressMP3::g_MP3BlockType3->f
}

MP3 Layer 3 index table for all block types.

---

g_MP3CompashHash

const Burger::DecompressMP3::Layer3Huffman_t Burger::DecompressMP3::g_MP3CompashHash

static

Initial value:

= {
 {0,g_CompactHash0},
 {0,g_CompactHash1}
}

Pointers to compact Huffman hash tables.

---

g_MP3FFTShortWindow

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3FFTShortWindow

static

Initial value:

= {
 {0x381DE964},{0x39B1A200},{0x3A76A9A7},{0x3AF1A81A},{0x3B47A80A},{0x3B950D1D},{0x3BD00DB6},{0x3C0A665C},
 {0x3C319FC5},{0x3C5DAD09},{0x3C8743AE},{0x3CA2139C},{0x3CBF422A},{0x3CDECADA},{0x3D005467},{0x3D126B67},
 {0x3D25A7A3},{0x3D3A0623},{0x3D4F83C3},{0x3D661D33},{0x3D7DCEF6},{0x3D8B4AB3},{0x3D983658},{0x3DA5A86C},
 {0x3DB39EDD},{0x3DC21782},{0x3DD11021},{0x3DE0866C},{0x3DF077FE},{0x3E007132},{0x3E08E18A},{0x3E118BBB},
 {0x3E1A6E6E},{0x3E238844},{0x3E2CD7D7},{0x3E365BB6},{0x3E40126B},{0x3E49FA75},{0x3E54124E},{0x3E5E5866},
 {0x3E68CB2A},{0x3E7368FB},{0x3E7E3038},{0x3E848F9B},{0x3E8A1A23},{0x3E8FB6D9},{0x3E9564DF},{0x3E9B2356},
 {0x3EA0F15B},{0x3EA6CE09},{0x3EACB877},{0x3EB2AFBD},{0x3EB8B2EF},{0x3EBEC120},{0x3EC4D960},{0x3ECAFAC0},
 {0x3ED1244C},{0x3ED75513},{0x3EDD8C1E},{0x3EE3C87A},{0x3EEA0930},{0x3EF04D49},{0x3EF693CD},{0x3EFCDBC6},
 {0x3F01921D},{0x3F04B619},{0x3F07D95C},{0x3F0AFB68},{0x3F0E1BC3},{0x3F1139F1},{0x3F145577},{0x3F176DDA},
 {0x3F1A82A0},{0x3F1D9350},{0x3F209F70},{0x3F23A688},{0x3F26A822},{0x3F29A3C5},{0x3F2C98FC},{0x3F2F8752},
 {0x3F326E55},{0x3F354D90},{0x3F382494},{0x3F3AF2EF},{0x3F3DB833},{0x3F4073F2},{0x3F4325C1},{0x3F45CD36},
 {0x3F4869E6},{0x3F4AFB6D},{0x3F4D8163},{0x3F4FFB65},{0x3F526912},{0x3F54CA0A},{0x3F571DEF},{0x3F596465},
 {0x3F5B9D11},{0x3F5DC79D},{0x3F5FE3B4},{0x3F61F100},{0x3F63EF33},{0x3F65DDFC},{0x3F67BD10},{0x3F698C24},
 {0x3F6B4AF2},{0x3F6CF935},{0x3F6E96AA},{0x3F702311},{0x3F719E2D},{0x3F7307C4},{0x3F745F9E},{0x3F75A586},
 {0x3F76D94A},{0x3F77FABA},{0x3F7909A9},{0x3F7A05EF},{0x3F7AEF63},{0x3F7BC5E3},{0x3F7C894C},{0x3F7D3981},
 {0x3F7DD667},{0x3F7E5FE5},{0x3F7ED5E6},{0x3F7F3858},{0x3F7F872C},{0x3F7FC256},{0x3F7FE9CC},{0x3F7FFD88}
}

MP3 Short Blackman FFT window.

---

g_MP3FFTWindow

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3FFTWindow

static

MP3 Blackman FFT window.

---

g_MP3GainPow2

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3GainPow2

static

MP3 Layer 3 table for pow(2.0,(i-46)*-0.25)

---

g_MP3IntensitySLen

const uint_t Burger::DecompressMP3::g_MP3IntensitySLen

static

MP3 Layer 3 stereo intensity table.

---

See also

Layer3GetScaleFactors2(uint_t *,GranuleInfo_t *,uint_t)

g_MP3Layer2Entries

const Burger::DecompressMP3::Layer2_AllocEntry_t * Burger::DecompressMP3::g_MP3Layer2Entries

static

Initial value:

= {
 g_AllocEntry0,g_AllocEntry1,g_AllocEntry2,g_AllocEntry3,g_AllocEntry4
}

Pointers to the MP3 Layer2 allocation tables.

---

g_MP3LongHash

const Burger::DecompressMP3::Layer3Huffman_t Burger::DecompressMP3::g_MP3LongHash

static

Pointers to long Huffman hash tables.

---

g_MP3MulTable64

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3MulTable64

static

MP3 Layer 2 magnitude table.

---

g_MP3NormalSLen

const uint_t Burger::DecompressMP3::g_MP3NormalSLen

static

MP3 Layer 3 mono intensity table.

---

See also

Layer3GetScaleFactors2(uint_t *,GranuleInfo_t *,uint_t)

g_MP3OneDivTan

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3OneDivTan

static

Initial value:

= {
 {0x3F800000},{0x3F49E69D},{0x3F224C29},{0x3F000000},{0x3EBB67AF},{0x3E58658C},{0x248D3132},{0xBEBB67AF},
 {0xBFAED9EC},{0xD9800000},{0x40176CF6},{0x3FAED9EC},{0x3F800000},{0x3F49E69D},{0x3F224C29},{0x3F000000}
}

MP3 Layer 3 tangent table for 1.0 / (tan((i * BURGER_PI) / 12.0) + 1)

---

g_MP3PhasedBlockType0

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3PhasedBlockType0

static

Initial value:

= {
 {0x3D043A95},{0xBDDB8F02},{0x3E4E3F8B},{0xBEA6B730},{0x3F000000},{0xBF448CE2},
 {0x3F9EE064},{0xC0153EB0},{0x40F7D015},{0x4107385A},{0xC0427FED},{0x3FF962DE},
 {0xBFBCC8EB},{0x3F9A827A},{0xBF843046},{0x3F6894D6},{0xBF5076D3},{0x3F3D489D},
 {0xBF2D724E},{0x3F1FF5CE},{0xBF142BB2},{0x3F09A043},{0xBF000000},{0x3EEE1832},
 {0xBEDD267E},{0x3ECCD9DA},{0xBEBCEC3D},{0x3EAD1DA9},{0xBE9D300C},{0x3E8CE369},
 {0xBE77E369},{0x3E5413CD},{0xBE2D92C2},{0x3E036505},{0xBDA87927},{0x3CF254B0}
}

MP3 Layer 3 table for phase shifted block type 0.

---

g_MP3PhasedBlockType1

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3PhasedBlockType1

static

Initial value:

= {
 {0x3D043A95},{0xBDDB8F02},{0x3E4E3F8B},{0xBEA6B730},{0x3F000000},{0xBF448CE2},
 {0x3F9EE064},{0xC0153EB0},{0x40F7D015},{0x4107385A},{0xC0427FED},{0x3FF962DE},
 {0xBFBCC8EB},{0x3F9A827A},{0xBF843046},{0x3F6894D6},{0xBF5076D3},{0x3F3D489D},
 {0xBF2D9C9B},{0x3F215729},{0xBF17C4A9},{0x3F104E0D},{0xBF0A8BD4},{0x3F063634},
 {0xBF01FC73},{0x3EEE8DD4},{0xBECB4ABD},{0x3E9BFDCC},{0xBE459FE7},{0x3D88E76C},
 {0x00000000},{0x80000000},{0x00000000},{0x80000000},{0x00000000},{0x80000000}
}

MP3 Layer 3 table for phase shifted block type 1.

---

g_MP3PhasedBlockType2

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3PhasedBlockType2

static

Initial value:

= {
 {0x3DDB8F02},{0xBF000000},{0x40153EB0},{0x40427FED},{0xBF9A827A},{0x3F5076D3},
 {0xBF1FF5CE},{0x3F000000},{0xBECCD9DA},{0x3E9D300C},{0xBE5413CD},{0x3DA87927}
}

MP3 Layer 3 table for phase shifted block type 2.

---

g_MP3PhasedBlockType3

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3PhasedBlockType3

static

Initial value:

= {
 {0x00000000},{0x80000000},{0x00000000},{0x80000000},{0x00000000},{0x80000000},
 {0x3E9A622D},{0xBFBBA375},{0x40DF4CA5},{0x41118135},{0xC0627FED},{0x40129517},
 {0xBFD4D526},{0x3FA73D75},{0xBF8A9A83},{0x3F6E3A75},{0xBF524353},{0x3F3D76C6},
 {0xBF2D724E},{0x3F1FF5CE},{0xBF142BB2},{0x3F09A043},{0xBF000000},{0x3EEE1832},
 {0xBEDD267E},{0x3ECCD9DA},{0xBEBCEC3D},{0x3EAD1DA9},{0xBE9D300C},{0x3E8CE369},
 {0xBE77E369},{0x3E5413CD},{0xBE2D92C2},{0x3E036505},{0xBDA87927},{0x3CF254B0}
}

MP3 Layer 3 table for phase shifted block type 3.

---

g_MP3PhasedBlockTypes

const float * Burger::DecompressMP3::g_MP3PhasedBlockTypes

static

Initial value:

= { 
 &Burger::DecompressMP3::g_MP3PhasedBlockType0->f,
 &Burger::DecompressMP3::g_MP3PhasedBlockType1->f,
 &Burger::DecompressMP3::g_MP3PhasedBlockType2->f,
 &Burger::DecompressMP3::g_MP3PhasedBlockType3->f
}

MP3 Layer 3 index table for all phased block types.

---

g_MP3Power3Div4

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3Power3Div4

static

Table of pow(i,4/3)

---

g_MP3PowMono1

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3PowMono1

static

Initial value:

= {
{
 {0x3F800000},{0x3F5744FD},{0x3F800000},{0x3F3504F3},{0x3F800000},{0x3F1837F0},{0x3F800000},{0x3F000000},
 {0x3F800000},{0x3ED744FD},{0x3F800000},{0x3EB504F3},{0x3F800000},{0x3E9837F0},{0x3F800000},{0x3E800000}
},{
 {0x3F800000},{0x3F3504F3},{0x3F800000},{0x3F000000},{0x3F800000},{0x3EB504F3},{0x3F800000},{0x3E800000},
 {0x3F800000},{0x3E3504F3},{0x3F800000},{0x3E000000},{0x3F800000},{0x3DB504F3},{0x3F800000},{0x3D800000}
}}

MP3 Layer 3 power table1 for mono.

---

g_MP3PowMono2

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3PowMono2

static

Initial value:

= {
{
 {0x3F800000},{0x3F800000},{0x3F5744FD},{0x3F800000},{0x3F3504F3},{0x3F800000},{0x3F1837F0},{0x3F800000},
 {0x3F000000},{0x3F800000},{0x3ED744FD},{0x3F800000},{0x3EB504F3},{0x3F800000},{0x3E9837F0},{0x3F800000}
},{
 {0x3F800000},{0x3F800000},{0x3F3504F3},{0x3F800000},{0x3F000000},{0x3F800000},{0x3EB504F3},{0x3F800000},
 {0x3E800000},{0x3F800000},{0x3E3504F3},{0x3F800000},{0x3E000000},{0x3F800000},{0x3DB504F3},{0x3F800000}
}}

MP3 Layer 3 power table2 for mono.

---

g_MP3PowStereo1

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3PowStereo1

static

Initial value:

= {
{
 {0x3FB504F3},{0x3F9837F0},{0x3FB504F3},{0x3F800000},{0x3FB504F3},{0x3F5744FD},{0x3FB504F3},{0x3F3504F3},
 {0x3FB504F3},{0x3F1837F0},{0x3FB504F3},{0x3F000000},{0x3FB504F3},{0x3ED744FD},{0x3FB504F3},{0x3EB504F3}
},{
 {0x3FB504F3},{0x3F800000},{0x3FB504F3},{0x3F3504F3},{0x3FB504F3},{0x3F000000},{0x3FB504F3},{0x3EB504F3},
 {0x3FB504F3},{0x3E800000},{0x3FB504F3},{0x3E3504F3},{0x3FB504F3},{0x3E000000},{0x3FB504F3},{0x3DB504F3}
}}

MP3 Layer 3 power table1 for stereo.

---

g_MP3PowStereo2

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3PowStereo2

static

Initial value:

= {
{
 {0x3FB504F3},{0x3FB504F3},{0x3F9837F0},{0x3FB504F3},{0x3F800000},{0x3FB504F3},{0x3F5744FD},{0x3FB504F3},
 {0x3F3504F3},{0x3FB504F3},{0x3F1837F0},{0x3FB504F3},{0x3F000000},{0x3FB504F3},{0x3ED744FD},{0x3FB504F3}
},{
 {0x3FB504F3},{0x3FB504F3},{0x3F800000},{0x3FB504F3},{0x3F3504F3},{0x3FB504F3},{0x3F000000},{0x3FB504F3},
 {0x3EB504F3},{0x3FB504F3},{0x3E800000},{0x3FB504F3},{0x3E3504F3},{0x3FB504F3},{0x3E000000},{0x3FB504F3}
}}

MP3 Layer 3 power table2 for stereo.

---

g_MP3SampleRates

const uint_t Burger::DecompressMP3::g_MP3SampleRates

static

Initial value:

= {
 44100,48000,32000,
 22050,24000,16000,
 11025,12000,8000
}

Table of sample rates supported by MP3.

---

Entries 0-2 are Version 1, 3-5 are Version 2, 6-8 are Version 2.5 indexed by m_uSamplingRateFrequencyIndex

Data found on https://www.mp3-tech.org/programmer/frame_header.html in entry F

g_MP3Sqrt2DivTan

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3Sqrt2DivTan

static

Initial value:

= {
 {0x3FB504F3},{0x3F8EC3F4},{0x3F6585F8},{0x3F3504F3},{0x3F0483EE},{0x3E9903FB},{0x24C7AD06},{0xBF0483EE},
 {0xBFF746EA},{0xD9B504F3},{0x405625EF},{0x3FF746EA},{0x3FB504F3},{0x3F8EC3F4},{0x3F6585F8},{0x3F3504F3}
}

MP3 Layer 3 tangent table for sqrt(2) / (tan((i * BURGER_PI) / 12.0) + 1)

---

g_MP3Sqrt2TanDivTan

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3Sqrt2TanDivTan

static

Initial value:

= {
 {0x00000000},{0x3E9903FB},{0x3F0483EE},{0x3F3504F3},{0x3F6585F8},{0x3F8EC3F4},{0x3FB504F3},{0x3FF746EA},
 {0x405625EF},{0x59B504F3},{0xBFF746EA},{0xBF0483EE},{0xA547AD06},{0x3E9903FB},{0x3F0483EE},{0x3F3504F3}
}

MP3 Layer 3 tangent table for sqrt(2) * tan((i * BURGER_PI) / 12.0) / (tan((i * BURGER_PI) / 12.0) + 1)

---

g_MP3TanDivTan

const Burger::uint32_float_t Burger::DecompressMP3::g_MP3TanDivTan

static

Initial value:

= {
 {0x00000000},{0x3E58658C},{0x3EBB67AF},{0x3F000000},{0x3F224C29},{0x3F49E69D},{0x3F800000},{0x3FAED9EC},
 {0x40176CF6},{0x59800000},{0xBFAED9EC},{0xBEBB67AF},{0xA50D3132},{0x3E58658C},{0x3EBB67AF},{0x3F000000}
}

MP3 Layer 3 tangent table for tan((i * BURGER_PI) / 12.0) / (tan((i * BURGER_PI) / 12.0) + 1)

---

g_SampleRateTables

const uint_t Burger::DecompressMP3::g_SampleRateTables

static

Initial value:

= {
 {22050, 24000, 16000,BURGER_MAXUINT}, 
 {44100, 48000, 32000,BURGER_MAXUINT}, 
 {11025, 12000, 8000,BURGER_MAXUINT} 
}

Expected sample rate for MP3 files.

---

The first index is which type of MP3 file is being looked up and the second index with the sample rate constant.

The order is Mpeg 2, Mpeg 1, Mpeg 2.5

g_SCFSI_BandTable

const uint_t Burger::DecompressMP3::g_SCFSI_BandTable = { 0, 6, 11, 16, 21 }

static

SCale Factor Selection Information.

---

Table for determining the granule size for the current SCFSI band.

g_StaticRTTI

const Burger::StaticRTTI Burger::DecompressMP3::g_StaticRTTI

static

The global description of the class.

---

This record contains the name of this class and a reference to the parent

g_Table

const int16_t Burger::DecompressMP3::g_Table

static

m_bBitStreamNotSynced

uint_t Burger::DecompressMP3::m_bBitStreamNotSynced

TRUE if the bit stream hadn't reached a sync marker.

m_bDataValid

uint_t Burger::DecompressMP3::m_bDataValid

TRUE if packet data was found.

m_bFreeFrame

uint_t Burger::DecompressMP3::m_bFreeFrame

TRUE if in free format mode (Sample rate can change)

m_bPreviousFreeFrame

uint_t Burger::DecompressMP3::m_bPreviousFreeFrame

TRUE if it was free format mode in the last pass.

m_bSideInfoValid

uint_t Burger::DecompressMP3::m_bSideInfoValid

TRUE if MP3 side information was parsed.

m_bVBRHeaderValid

uint_t Burger::DecompressMP3::m_bVBRHeaderValid

TRUE if a Variable Bit Rate header was parsed.

m_ByteStreamBuffers

uint8_t Burger::DecompressMP3::m_ByteStreamBuffers[2][cMaxFrameSize+1024]

Internal buffers.

m_eState

eState Burger::DecompressMP3::m_eState

protected

State of the decompression.

m_fHybridBlocks

float Burger::DecompressMP3::m_fHybridBlocks[2][2][cSubBandLimit *cSideSampleLimit]

Buffers for DCT tables.

m_FrameHeaderExt

FrameHeaderExt_t Burger::DecompressMP3::m_FrameHeaderExt

Data frame state.

m_fSynthBuffers

float Burger::DecompressMP3::m_fSynthBuffers[2][2][256+16]

Output buffers for DCT transforms (with 16 entry padding)

m_iCache

int16_t Burger::DecompressMP3::m_iCache

protected

Temp uncompressed data buffer.

m_iEncodingDelay

int Burger::DecompressMP3::m_iEncodingDelay

Encoding delay from 0-3000 (or -1 if invalid)

m_iEncodingPadding

int Burger::DecompressMP3::m_iEncodingPadding

Encoding padding from 0-3000 (or -1 if invalid)

m_Layer3SideInfo

Layer3SideInfo_t Burger::DecompressMP3::m_Layer3SideInfo

Side information for Layer 3 decoding.

m_pNext

Chunk_t* Burger::DecompressMP3::m_pNext

First entry in the linked list of data chunks.

m_pPrev

Chunk_t* Burger::DecompressMP3::m_pPrev

Last entry in the linked list of data chunks.

m_pWorkPointer

uint8_t* Burger::DecompressMP3::m_pWorkPointer

Pointer to m_ByteStreamBuffers.

m_uBitIndex

uint_t Burger::DecompressMP3::m_uBitIndex

Which bit is being parse for bit streaming (0-7)

m_uCacheSize

uint_t Burger::DecompressMP3::m_uCacheSize

protected

Number of valid bytes in m_uCache.

m_uFrameSize

uintptr_t Burger::DecompressMP3::m_uFrameSize

Number of bytes in the frame.

m_uHybridBlockIndexes

uint_t Burger::DecompressMP3::m_uHybridBlockIndexes[2]

Which m_fHybridBlocks tables that are active (2 channels)

m_uMP3DataSize

uintptr_t Burger::DecompressMP3::m_uMP3DataSize

Number of compressed byte in the current packet.

m_uPreviousFramePadding

uint_t Burger::DecompressMP3::m_uPreviousFramePadding

Number of bits from the previous frame's padding.

m_uPreviousFrameSize

uintptr_t Burger::DecompressMP3::m_uPreviousFrameSize

Previous data frame size, UINTPTR_MAX is none was found.

m_uRemainingBytes

uintptr_t Burger::DecompressMP3::m_uRemainingBytes

Number of bytes remaining stored in the entire linked list.

m_uSideInfoSize

uintptr_t Burger::DecompressMP3::m_uSideInfoSize

Number of bytes for Side Information (Including CRC if present)

m_uSynthBufferOffset

uint_t Burger::DecompressMP3::m_uSynthBufferOffset

Synthesizer buffer offset (0-15)

m_uVBRFrames

uint_t Burger::DecompressMP3::m_uVBRFrames

VBR frames from the Xing packet.

m_uWhichBuffer

uint_t Burger::DecompressMP3::m_uWhichBuffer

Which byte stream buffer is active? (0 or 1)

Signature

const uint32_t Burger::DecompressMP3::Signature = 0x4D503320

static

'MP3 '