csl::LPCAnalyzer Class Reference

#include <LPC.h>

Inheritance diagram for csl::LPCAnalyzer:

List of all members.

Public Member Functions
	LPCAnalyzer (UnitGenerator &in, unsigned size=CGestalt::blockSize(), unsigned hopSize=CGestalt::blockSize(), unsigned order=50)
	Forward FFT = analysis.
	~LPCAnalyzer ()
unsigned	windowSize ()
	no setters
unsigned	hopSize ()
unsigned	LPCOrder ()
Buffer	getCoefficients ()
Buffer	getResidual ()
double	getError ()
void	setFileNames (char *coeff, char *resid)
	set the file names and open the files
void	setPreEmphasis (double factor)
void	setBWExpansion (double factor)
void	closeFiles ()
	close the files
void	setOverwrite (bool reuse)
void	setUseWindow (bool use)
	analyze a buffer, write it out if the files are set, then signal your observers
void	nextBuffer (Buffer &outputBuffer, unsigned outBufNum) throw (CException)
Protected Attributes
unsigned	mWindowSize
	input window size
unsigned	mHopSize
	input hop size
unsigned	mLPCOrder
	LPC order.
double	mPredErr
	LPC pred.error.
double	mPreEmphasis
	LPC pre-emph factor.
double	mBWExpansion
	LPC bandwidth expansion factor.
bool	mOverwriteOutput
	whether to replace the output with the input (or the residual) after signalling observers
bool	mUseWindow
Buffer	mTempBuffer
	Protected buffers and analysis objects.
Buffer	mWindowBuffer
	Buffer to store window.
Buffer	mLPCCoefficients
	the LPC reflection coefficients
Buffer	mFilterCoefficients
	the LPC filter coefficients
Buffer	mFilterInput
	the LPC filter input store
Buffer	mPCCoefficients
	the LPC PC coefficients
Buffer	mLPCResidual
	the LPC residual
RingBuffer	mRing
Butter *	mLoPass
	Filters and FFT for analysis.
Butter *	mHiPass
	hi-pass filter
FFT *	mFFT
	FFT for pitch est.
FILE *	mCoeffFile
	file ptr for the coefficient file
SoundFile *	mResidFile
	sound file for the residual file

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Detailed Description

LPCAnalyzer class takes LPC analysis and returns coefficients and the residual It can write these to two files (if you set the file names), or signal its observers (who would grab its internal state via the getter methods)

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Constructor & Destructor Documentation

LPCAnalyzer::LPCAnalyzer	(	UnitGenerator &	in,
		unsigned	size = CGestalt::blockSize(),
		unsigned	hopSize = CGestalt::blockSize(),
		unsigned	order = 50
	)

Forward FFT = analysis.

References csl::Buffer::allocateBuffers(), BW_HIGH_PASS, BW_LOW_PASS, csl::CSL_FFT_REAL, csl::kCopy, csl::kLPCCoeff, csl::Buffer::mBuffers, csl::UnitGenerator::mCopyPolicy, mFFT, mFilterCoefficients, mFilterInput, mHiPass, mLoPass, mLPCCoefficients, mLPCResidual, mPCCoefficients, mRing, mTempBuffer, csl::Buffer::mType, mWindowBuffer, mWindowSize, and csl::Window::window().

LPCAnalyzer::~LPCAnalyzer

(

)

References closeFiles().

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Member Function Documentation

unsigned csl::LPCAnalyzer::windowSize

(

)

[inline]

no setters

References mWindowSize.

unsigned csl::LPCAnalyzer::hopSize

(

)

[inline]

References mHopSize.

unsigned csl::LPCAnalyzer::LPCOrder

(

)

[inline]

References mLPCOrder.

Buffer csl::LPCAnalyzer::getCoefficients

(

)

[inline]

References mLPCCoefficients.

Buffer csl::LPCAnalyzer::getResidual

(

)

[inline]

References mLPCResidual.

double csl::LPCAnalyzer::getError

(

)

[inline]

References mPredErr.

void LPCAnalyzer::setFileNames	(	char *	coeff,
		char *	resid
	)

set the file names and open the files

References CSL_LPC_LKEY, csl::lpc_header::duration, csl::lpc_header::filesize, csl::CGestalt::frameRate(), csl::lpc_header::hopSize, csl::lpc_header::keyword, kSoundFileFormatAIFF, mCoeffFile, mHopSize, mLPCOrder, mPreEmphasis, mResidFile, mWindowSize, csl::lpc_header::order, csl::lpc_header::preEmphasis, and csl::lpc_header::windowSize.

void csl::LPCAnalyzer::setPreEmphasis

(

double

factor

)

[inline]

References mPreEmphasis.

void csl::LPCAnalyzer::setBWExpansion

(

double

factor

)

[inline]

References mBWExpansion.

void LPCAnalyzer::closeFiles

(

)

close the files

References mCoeffFile, and mResidFile.

Referenced by ~LPCAnalyzer().

void csl::LPCAnalyzer::setOverwrite

(

bool

reuse

)

[inline]

References mOverwriteOutput.

void csl::LPCAnalyzer::setUseWindow

(

bool

use

)

[inline]

analyze a buffer, write it out if the files are set, then signal your observers

References mUseWindow.

void LPCAnalyzer::nextBuffer	(	Buffer &	outputBuffer,
		unsigned	outBufNum
	)			throw (CException) [virtual]

really compute the next buffer given an offset base channel; this is called by nextBuffer, possibly multiple times

Reimplemented from csl::UnitGenerator.

References csl::frame_header::centroid, counter, CSL_HPS_DEPTH, csl::frame_header::formant1, csl::frame_header::formant2, csl::CGestalt::frameRate(), csl::frame_header::freqest1, csl::frame_header::freqest2, csl::frame_header::hifreq, csl::Effect::inPort(), csl::frame_header::isTransition, testkiss::j, csl::frame_header::lofreq, csl::Port::mBuffer, csl::Buffer::mBuffers, csl::frame_header::MIDIKey, csl::frame_header::noisiness, csl::Effect::pullInput(), csl::frame_header::resid, csl::frame_header::rmsamp, csl::frame_header::smoothfreq, and csl::frame_header::zeroes.

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Member Data Documentation

unsigned csl::LPCAnalyzer::mWindowSize [protected]

input window size

Referenced by LPCAnalyzer(), setFileNames(), and windowSize().

unsigned csl::LPCAnalyzer::mHopSize [protected]

input hop size

Referenced by hopSize(), and setFileNames().

unsigned csl::LPCAnalyzer::mLPCOrder [protected]

LPC order.

Referenced by LPCOrder(), and setFileNames().

double csl::LPCAnalyzer::mPredErr [protected]

LPC pred.error.

Referenced by getError().

double csl::LPCAnalyzer::mPreEmphasis [protected]

LPC pre-emph factor.

Referenced by setFileNames(), and setPreEmphasis().

double csl::LPCAnalyzer::mBWExpansion [protected]

LPC bandwidth expansion factor.

Referenced by setBWExpansion().

bool csl::LPCAnalyzer::mOverwriteOutput [protected]

whether to replace the output with the input (or the residual) after signalling observers

Referenced by setOverwrite().

bool csl::LPCAnalyzer::mUseWindow [protected]

whether to use a rectangular or Hamming window

Referenced by setUseWindow().

Buffer csl::LPCAnalyzer::mTempBuffer [protected]

Protected buffers and analysis objects.

the input buffer

Referenced by LPCAnalyzer().

Buffer csl::LPCAnalyzer::mWindowBuffer [protected]

Buffer to store window.

Referenced by LPCAnalyzer().

Buffer csl::LPCAnalyzer::mLPCCoefficients [protected]

the LPC reflection coefficients

Referenced by getCoefficients(), and LPCAnalyzer().

Buffer csl::LPCAnalyzer::mFilterCoefficients [protected]

the LPC filter coefficients

Referenced by LPCAnalyzer().

Buffer csl::LPCAnalyzer::mFilterInput [protected]

the LPC filter input store

Referenced by LPCAnalyzer().

Buffer csl::LPCAnalyzer::mPCCoefficients [protected]

the LPC PC coefficients

Referenced by LPCAnalyzer().

Buffer csl::LPCAnalyzer::mLPCResidual [protected]

the LPC residual

Referenced by getResidual(), and LPCAnalyzer().

RingBuffer csl::LPCAnalyzer::mRing [protected]

used for the analysis UGens

Referenced by LPCAnalyzer().

Butter* csl::LPCAnalyzer::mLoPass [protected]

Filters and FFT for analysis.

low-pass filter

Referenced by LPCAnalyzer().

Butter* csl::LPCAnalyzer::mHiPass [protected]

hi-pass filter

Referenced by LPCAnalyzer().

FFT* csl::LPCAnalyzer::mFFT [protected]

FFT for pitch est.

Referenced by LPCAnalyzer().

FILE* csl::LPCAnalyzer::mCoeffFile [protected]

file ptr for the coefficient file

Referenced by closeFiles(), and setFileNames().

SoundFile* csl::LPCAnalyzer::mResidFile [protected]

sound file for the residual file

Referenced by closeFiles(), and setFileNames().

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

• CSL/Processors/OLD/LPC.h
• CSL/Processors/OLD/LPC.cpp