mdf.c File Reference

#include "misc.h"
#include "speex/speex_echo.h"
#include "fftwrap.h"
#include "pseudofloat.h"
#include "math_approx.h"

Include dependency graph for mdf.c:

Classes
struct	SpeexEchoState_
Defines
#define	M_PI   3.14159265358979323846
#define	min(a, b)   ((a)<(b) ? (a) : (b))
#define	max(a, b)   ((a)>(b) ? (a) : (b))
#define	WEIGHT_SHIFT   0
#define	TOP16(x)   (x)
Functions
SpeexEchoState *	speex_echo_state_init (int frame_size, int filter_length)
void	speex_echo_state_reset (SpeexEchoState *st)
void	speex_echo_state_destroy (SpeexEchoState *st)
void	speex_echo_cancel (SpeexEchoState *st, short *ref, short *echo, short *out, spx_int32_t *Yout)
int	speex_echo_ctl (SpeexEchoState *st, int request, void *ptr)
Variables
int	fixed_point

---

Define Documentation

#define M_PI   3.14159265358979323846

#define max	(	a,
		b		)	((a)>(b) ? (a) : (b))

Referenced by speex_preprocess(), and speex_preprocess_estimate_update().

#define min	(	a,
		b		)	((a)<(b) ? (a) : (b))

#define TOP16

(

x

)

(x)

#define WEIGHT_SHIFT   0

Referenced by speex_echo_cancel().

---

Function Documentation

void speex_echo_cancel	(	SpeexEchoState *	st,
		short *	ref,
		short *	echo,
		short *	out,
		spx_int32_t *	Yout
	)

Performs echo cancellation on a frame

References ADD32, DIV32_16, EXTEND32, FLOAT_ADD, FLOAT_DIV32, FLOAT_DIV32_FLOAT, FLOAT_DIVU, FLOAT_EXTRACT16, FLOAT_GT, FLOAT_LT, FLOAT_MUL32U, FLOAT_MULT, FLOAT_ONE, FLOAT_SHL, FLOAT_SUB, MAC16_32_Q15, MULT16_16_P15, MULT16_16_Q15, MULT16_32_Q15, PSEUDOFLOAT, PSHR32, QCONST16, QCONST32, SHL, SHL16, SHL32, SHR32, spx_fft(), spx_float_t, spx_ifft(), SUB16, SUB32, and WEIGHT_SHIFT.

Referenced by main().

int speex_echo_ctl	(	SpeexEchoState *	st,
		int	request,
		void *	ptr
	)

References DIV32_16, QCONST16, SHL32, and speex_warning_int().

Referenced by main().

void speex_echo_state_destroy

(

SpeexEchoState *

st

)

Destroys an echo canceller state

References speex_free(), and spx_fft_destroy().

Referenced by main().

SpeexEchoState* speex_echo_state_init	(	int	frame_size,
		int	filter_length
	)

Creates a new echo canceller state

References DIV32_16, FLOAT_ONE, M_PI, MULT16_16, QCONST16, SHL16, SHL32, speex_alloc(), spx_cos(), spx_fft_init(), and spx_float_t.

Referenced by main().

void speex_echo_state_reset

(

SpeexEchoState *

st

)

Resets echo canceller state

References FLOAT_ONE.

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Variable Documentation

int fixed_point