patest_latency.c File Reference

Hear the latency caused by big buffers. Play a sine wave and change frequency based on letter input. More...

#include <stdio.h>
#include <math.h>
#include "portaudio.h"

Data Structures
struct	paTestData

Macros
#define	OUTPUT_DEVICE   (Pa_GetDefaultOutputDevice())
#define	SAMPLE_RATE   (44100)
#define	FRAMES_PER_BUFFER   (64)
#define	MIN_FREQ   (100.0f)
#define	CalcPhaseIncrement(freq)   ((freq)/SAMPLE_RATE)
#define	M_PI   (3.14159265)
#define	TABLE_SIZE   (400)

Functions
float	LookupSine (paTestData *data, float phase)
int	main (void)

Detailed Description

Hear the latency caused by big buffers. Play a sine wave and change frequency based on letter input.

Author

Phil Burk philb.nosp@m.urk@.nosp@m.softs.nosp@m.ynth.nosp@m..com, and Darren Gibbs

Macro Definition Documentation

#define CalcPhaseIncrement

(

freq

)

((freq)/SAMPLE_RATE)

#define FRAMES_PER_BUFFER   (64)

#define M_PI   (3.14159265)

#define MIN_FREQ   (100.0f)

#define OUTPUT_DEVICE   (Pa_GetDefaultOutputDevice())

#define SAMPLE_RATE   (44100)

#define TABLE_SIZE   (400)

Referenced by LookupSine().

Function Documentation

float LookupSine	(	paTestData *	data,
		float	phase
	)

References paTestData::sine, and TABLE_SIZE.

int main

(

void

)