lsp.c File Reference

#include <math.h>
#include <string.h>
#include <stdlib.h>
#include "lsp.h"
#include "os.h"
#include "misc.h"
#include "lookup.h"
#include "scales.h"

Go to the source code of this file.

Macros
#define	EPSILON   10e-7

Functions
static void	cheby (float *g, int ord)
static int	comp (const void *a, const void *b)
static int	Laguerre_With_Deflation (float *a, int ord, float *r)
static int	Newton_Raphson (float *a, int ord, float *r)
int	vorbis_lpc_to_lsp (float *lpc, float *lsp, int m)
void	vorbis_lsp_to_curve (float *curve, int *map, int n, int ln, float *lsp, int m, float amp, float ampoffset)

Macro Definition Documentation

#define EPSILON   10e-7

Definition at line 309 of file lsp.c.

Referenced by Laguerre_With_Deflation().

Function Documentation

static void cheby ( float *  g, int  ord  )

static

Definition at line 286 of file lsp.c.

References i, and j.

Referenced by vorbis_lpc_to_lsp().

static int comp ( const void *  a, const void *  b  )

static

Definition at line 298 of file lsp.c.

Referenced by ca_open_capture(), ca_open_playback(), png_write_iCCP(), png_write_iTXt(), png_write_zTXt(), prepare_audiounit(), and vorbis_lpc_to_lsp().

static int Laguerre_With_Deflation ( float *  a, int  ord, float *  r  )

static

Definition at line 310 of file lsp.c.

References e, EPSILON, fabs(), i, m, and pp.

Referenced by vorbis_lpc_to_lsp().

static int Newton_Raphson ( float *  a, int  ord, float *  r  )

static

Definition at line 366 of file lsp.c.

References e, error, i, k, and pp.

Referenced by vorbis_lpc_to_lsp().

int vorbis_lpc_to_lsp	(	float *	lpc,
		float *	lsp,
		int	m
	)

Definition at line 405 of file lsp.c.

References cheby(), comp(), i, Laguerre_With_Deflation(), m, Newton_Raphson(), and qsort().

void vorbis_lsp_to_curve	(	float *	curve,
		int *	map,
		int	n,
		int	ln,
		float *	lsp,
		int	m,
		float	amp,
		float	ampoffset
	)

Definition at line 248 of file lsp.c.

References cos(), fromdB, i, j, m, and M_PI.

Referenced by floor0_inverse2().