power_meter.c File Reference

#include <inttypes.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <float.h>
#include <assert.h>
#include "spandsp/telephony.h"
#include "spandsp/power_meter.h"

Functions
power_meter_t *	power_meter_init (power_meter_t *s, int shift)
	Initialise a power meter context.
power_meter_t *	power_meter_damping (power_meter_t *s, int shift)
	Change the damping factor of a power meter context.
int32_t	power_meter_update (power_meter_t *s, int16_t amp)
	Update a power meter.
int32_t	power_meter_level_dbm0 (float level)
	Get the current power meter reading, in dBm0.
int32_t	power_meter_level_dbov (float level)
	Get the current power meter reading, in dBOv.
float	power_meter_dbm0 (power_meter_t *s)
	Get the current power meter reading, in dBm0.
float	power_meter_dbov (power_meter_t *s)
	Get the current power meter reading, in dBOv.

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Detailed Description

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Function Documentation

power_meter_t* power_meter_damping (  power_meter_t *  s, int  shift )

Change the damping factor of a power meter context. Change the damping factor of a power meter context. Parameters: s  The power meter context. shift  The new shift to be used by the IIR filter. Returns: The power meter context.

float power_meter_dbm0 (  power_meter_t *  s  )

Get the current power meter reading, in dBm0. Get the current power meter reading, in dBm0. Parameters: s  The power meter context. Returns: The current power meter reading, in dBm0.

float power_meter_dbov (  power_meter_t *  s  )

Get the current power meter reading, in dBOv. Get the current power meter reading, in dBOv. Parameters: s  The power meter context. Returns: The current power meter reading, in dBOv.

power_meter_t* power_meter_init (  power_meter_t *  s, int  shift )

Initialise a power meter context. Initialise a power meter context. Parameters: s  The power meter context. shift  The shift to be used by the IIR filter. Returns: The power meter context.

int32_t power_meter_level_dbm0 (  float  level  )

Get the current power meter reading, in dBm0. Get the power meter reading which represents a specified power level in dBm0. Parameters: level  A power level, in dB0m. Returns: The equivalent power meter reading.

int32_t power_meter_level_dbov (  float  level  )

Get the current power meter reading, in dBOv. Get the power meter reading which represents a specified power level in dBOv. Parameters: level  A power level, in dBOv. Returns: The equivalent power meter reading.

int32_t power_meter_update (  power_meter_t *  s, int16_t  amp )

Update a power meter. Update a power meter. Parameters: s  The power meter context. amp  The amplitude of the new audio sample. Returns: The current power meter reading.

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