MP3Internals.cpp File Reference

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Classes
struct	bandInfoStruct
Functions
unsigned	ComputeFrameSize (unsigned bitrate, unsigned samplingFreq, Boolean usePadding, Boolean isMPEG2, unsigned char layer)
static unsigned	updateSideInfoSizes (MP3SideInfo &sideInfo, Boolean isMPEG2, unsigned char const *mainDataPtr, unsigned allowedNumBits, unsigned &part23Length0a, unsigned &part23Length0aTruncation, unsigned &part23Length0b, unsigned &part23Length0bTruncation, unsigned &part23Length1a, unsigned &part23Length1aTruncation, unsigned &part23Length1b, unsigned &part23Length1bTruncation)
Boolean	GetADUInfoFromMP3Frame (unsigned char const *framePtr, unsigned totFrameSize, unsigned &hdr, unsigned &frameSize, MP3SideInfo &sideInfo, unsigned &sideInfoSize, unsigned &backpointer, unsigned &aduSize)
static void	getSideInfo1 (MP3FrameParams &fr, MP3SideInfo &si, int stereo, int ms_stereo, long sfreq, int)
static void	getSideInfo2 (MP3FrameParams &fr, MP3SideInfo &si, int stereo, int ms_stereo, long sfreq, int)
static void	putSideInfo1 (BitVector &bv, MP3SideInfo const &si, Boolean isStereo)
static void	putSideInfo2 (BitVector &bv, MP3SideInfo const &si, Boolean isStereo)
static void	PutMP3SideInfoIntoFrame (MP3SideInfo const &si, MP3FrameParams const &fr, unsigned char *framePtr)
Boolean	ZeroOutMP3SideInfo (unsigned char *framePtr, unsigned totFrameSize, unsigned newBackpointer)
static unsigned	MP3BitrateToBitrateIndex (unsigned bitrate, Boolean isMPEG2)
static void	outputHeader (unsigned char *toPtr, unsigned hdr)
static void	assignADUBackpointer (MP3FrameParams const &fr, unsigned aduSize, MP3SideInfo &sideInfo, unsigned &availableBytesForBackpointer)
unsigned	TranscodeMP3ADU (unsigned char const *fromPtr, unsigned fromSize, unsigned toBitrate, unsigned char *toPtr, unsigned toMaxSize, unsigned &availableBytesForBackpointer)
Variables
static unsigned	live_tabsel [2][3][16]
static long	live_freqs [] = { 44100, 48000, 32000, 22050, 24000, 16000, 11025, 12000, 8000, 0 }
static struct bandInfoStruct const	bandInfo [7]
unsigned int	n_slen2 [512]
unsigned int	i_slen2 [256]

---

Function Documentation

unsigned ComputeFrameSize	(	unsigned	bitrate,
		unsigned	samplingFreq,
		Boolean	usePadding,
		Boolean	isMPEG2,
		unsigned char	layer
	)

Definition at line 219 of file MP3Internals.cpp.

static unsigned updateSideInfoSizes	(	MP3SideInfo &	sideInfo,
		Boolean	isMPEG2,
		unsigned char const *	mainDataPtr,
		unsigned	allowedNumBits,
		unsigned &	part23Length0a,
		unsigned &	part23Length0aTruncation,
		unsigned &	part23Length0b,
		unsigned &	part23Length0bTruncation,
		unsigned &	part23Length1a,
		unsigned &	part23Length1aTruncation,
		unsigned &	part23Length1b,
		unsigned &	part23Length1bTruncation
	)			[static]

Definition at line 234 of file MP3Internals.cpp.

Referenced by TranscodeMP3ADU().

Boolean GetADUInfoFromMP3Frame	(	unsigned char const *	framePtr,
		unsigned	totFrameSize,
		unsigned &	hdr,
		unsigned &	frameSize,
		MP3SideInfo &	sideInfo,
		unsigned &	sideInfoSize,
		unsigned &	backpointer,
		unsigned &	aduSize
	)

Definition at line 303 of file MP3Internals.cpp.

Referenced by SegmentQueue::sqAfterGettingCommon(), and TranscodeMP3ADU().

static void getSideInfo1	(	MP3FrameParams &	fr,
		MP3SideInfo &	si,
		int	stereo,
		int	ms_stereo,
		long	sfreq,
		int
	)			[static]

Definition at line 346 of file MP3Internals.cpp.

static void getSideInfo2	(	MP3FrameParams &	fr,
		MP3SideInfo &	si,
		int	stereo,
		int	ms_stereo,
		long	sfreq,
		int
	)			[static]

Definition at line 429 of file MP3Internals.cpp.

static void putSideInfo1	(	BitVector &	bv,
		MP3SideInfo const &	si,
		Boolean	isStereo
	)			[static]

Definition at line 536 of file MP3Internals.cpp.

Referenced by PutMP3SideInfoIntoFrame().

static void putSideInfo2	(	BitVector &	bv,
		MP3SideInfo const &	si,
		Boolean	isStereo
	)			[static]

Definition at line 582 of file MP3Internals.cpp.

Referenced by PutMP3SideInfoIntoFrame().

static void PutMP3SideInfoIntoFrame	(	MP3SideInfo const &	si,
		MP3FrameParams const &	fr,
		unsigned char *	framePtr
	)			[static]

Definition at line 621 of file MP3Internals.cpp.

Referenced by TranscodeMP3ADU(), and ZeroOutMP3SideInfo().

Boolean ZeroOutMP3SideInfo	(	unsigned char *	framePtr,
		unsigned	totFrameSize,
		unsigned	newBackpointer
	)

Definition at line 636 of file MP3Internals.cpp.

Referenced by SegmentQueue::insertDummyBeforeTail().

static unsigned MP3BitrateToBitrateIndex	(	unsigned	bitrate,
		Boolean	isMPEG2
	)			[static]

Definition at line 664 of file MP3Internals.cpp.

Referenced by TranscodeMP3ADU().

static void outputHeader	(	unsigned char *	toPtr,
		unsigned	hdr
	)			[static]

Definition at line 675 of file MP3Internals.cpp.

Referenced by TranscodeMP3ADU().

static void assignADUBackpointer	(	MP3FrameParams const &	fr,
		unsigned	aduSize,
		MP3SideInfo &	sideInfo,
		unsigned &	availableBytesForBackpointer
	)			[static]

Definition at line 682 of file MP3Internals.cpp.

Referenced by TranscodeMP3ADU().

unsigned TranscodeMP3ADU	(	unsigned char const *	fromPtr,
		unsigned	fromSize,
		unsigned	toBitrate,
		unsigned char *	toPtr,
		unsigned	toMaxSize,
		unsigned &	availableBytesForBackpointer
	)

Definition at line 707 of file MP3Internals.cpp.

---

Variable Documentation

unsigned live_tabsel[2][3][16] [static]

Initial value:

 {
   { {32,32,64,96,128,160,192,224,256,288,320,352,384,416,448,448},
     {32,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,384},
     {32,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,320} },

   { {32,32,48,56,64,80,96,112,128,144,160,176,192,224,256,256},
     {8,8,16,24,32,40,48,56,64,80,96,112,128,144,160,160},
     {8,8,16,24,32,40,48,56,64,80,96,112,128,144,160,160} }
}

Definition at line 30 of file MP3Internals.cpp.

Referenced by MP3BitrateToBitrateIndex().

long live_freqs[] = { 44100, 48000, 32000, 22050, 24000, 16000, 11025, 12000, 8000, 0 } [static]

Definition at line 42 of file MP3Internals.cpp.

struct bandInfoStruct const bandInfo[7] [static]

Definition at line 51 of file MP3Internals.cpp.

unsigned int n_slen2[512]

Definition at line 91 of file MP3Internals.cpp.

unsigned int i_slen2[256]

Definition at line 92 of file MP3Internals.cpp.