fl::audio::fft::Context Class Reference

Detailed Description

Definition at line 60 of file fft_impl.cpp.hpp.

#include <fft_impl.cpp.hpp>

Collaboration diagram for fl::audio::fft::Context:

Classes
struct	FftScratch
struct	OctaveInfo

Public Member Functions
	Context (int samples, int bands, float fmin, float fmax, int sample_rate, Mode mode, Window window) FL_NO_EXCEPT
	~Context () FL_NO_EXCEPT
fl::string	info () const FL_NO_EXCEPT
void	run (span< const i16 > buffer, Bins *out) FL_NO_EXCEPT
fl::size	sampleSize () const FL_NO_EXCEPT

Private Member Functions
void	buildLinearBinLut (fl::vector< u8 > &lut, int fftN) FL_NO_EXCEPT
void	buildLogBinLut (fl::vector< u8 > &lut, int fftN, float fs, int binStart, int binEnd) FL_NO_EXCEPT
void	computeBinEdgesQ16 () FL_NO_EXCEPT
void	computeLinearBins (const u16 *mag, int, Bins *out) FL_NO_EXCEPT
void	computeLogRebinNormFactors (fl::vector< float > &normFactors, const fl::vector< u8 > &lut, int fftN, float fs, int binStart, int binEnd) FL_NO_EXCEPT
void	initHybrid (int samples, int bands, float fmin, float fmax, int sr) FL_NO_EXCEPT
void	initLogRebin () FL_NO_EXCEPT
void	initNaive (int samples, int bands, float fmin, float fmax, int sr) FL_NO_EXCEPT
void	initOctaveWise (int samples, int bands, float fmin, float fmax, int sr) FL_NO_EXCEPT
void	initWindow () FL_NO_EXCEPT
void	logRebinRange (const u16 *mag, int fftN, float fs, int binStart, int binEnd, u32 *rawBinsI, const fl::vector< u8 > &lut) FL_NO_EXCEPT
void	runHybrid (span< const i16 > buffer, Bins *out) FL_NO_EXCEPT
void	runLogRebin (span< const i16 > buffer, Bins *out) FL_NO_EXCEPT
void	runNaive (span< const i16 > buffer, Bins *out) FL_NO_EXCEPT
void	runOctaveWise (span< const i16 > buffer, Bins *out) FL_NO_EXCEPT

Static Private Member Functions
static void	applyWindow (const kiss_fft_scalar *samples, const alpha16 *win, kiss_fft_scalar *out, int N) FL_NO_EXCEPT
static void	batchMag (const kiss_fft_scalar *re, const kiss_fft_scalar *im, u16 *mag, int n) FL_NO_EXCEPT
static void	computeWindow (fl::vector< alpha16 > &win, int N, Window type) FL_NO_EXCEPT
static void	decimateBy2 (kiss_fft_scalar *buf, int len) FL_NO_EXCEPT
static void	deinterleave (const kiss_fft_cpx *cpx, kiss_fft_scalar *re, kiss_fft_scalar *im, int n) FL_NO_EXCEPT
static float	fastDb (u32 x) FL_NO_EXCEPT
static u16	fastMag (i32 re, i32 im) FL_NO_EXCEPT
static FftScratch &	scratch () FL_NO_EXCEPT

Private Attributes
fl::vector< u16 >	mCoverageFirst
fl::vector< u16 >	mCoverageLast
cq_kernel_cfg	mCqCfg
fl::vector< kiss_fft_cpx >	mFftOut
kiss_fftr_cfg	mFftrCfg
float	mFmax
float	mFmin
fl::vector< alpha16 >	mHybridBassWindow
fl::vector< float >	mHybridMergedNorm
kiss_fftr_cfg	mHybridMidFft = nullptr
fl::vector< kiss_fft_cpx >	mHybridMidFftOut
float	mHybridMidFs = 0.0f
int	mHybridMidN = 0
int	mHybridMidSplitBin = 0
fl::vector< alpha16 >	mHybridMidWindow
fl::vector< float >	mHybridNormBass
fl::vector< float >	mHybridNormMid
fl::vector< float >	mHybridNormUpper
kiss_fftr_cfg	mHybridSmallFft = nullptr
fl::vector< kiss_fft_cpx >	mHybridSmallFftOut
float	mHybridSmallFs = 0.0f
int	mHybridSmallN = 0
int	mHybridSplitBin = 0
int	mInputSamples
cq_kernels_t	mKernels
fl::vector< u8 >	mLinearBinLut
int	mLinearKEnd = 0
int	mLinearKStart = 0
fl::vector< float >	mLogBinEdges
fl::vector< u16x16 >	mLogBinEdgesQ16
fl::vector< u8 >	mLogBinLut
fl::vector< u8 >	mLogBinLutBass
fl::vector< u8 >	mLogBinLutMid
fl::vector< float >	mLogBinNormFactors
int	mMaxBinsPerOctave = 0
Mode	mMode
fl::vector< OctaveInfo >	mOctaves
int	mSampleRate
int	mTotalBands
Window	mWindow
fl::vector< alpha16 >	mWindowBuf
fl::vector< kiss_fft_scalar >	mWorkBuf

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

• fl/audio/fft/fft_impl.cpp.hpp