paqa_latency.c File Reference

Test latency estimates. More...

#include <stdio.h>
#include <math.h>
#include "portaudio.h"
#include "loopback/src/qa_tools.h"

Data Structures
struct	paTestData

Macros
#define	NUM_SECONDS   (5)
#define	SAMPLE_RATE   (44100)
#define	FRAMES_PER_BUFFER   (64)
#define	M_PI   (3.14159265)
#define	TABLE_SIZE   (200)

Functions
PaError	paqaCheckLatency (PaStreamParameters *outputParamsPtr, paTestData *dataPtr, double sampleRate, unsigned long framesPerBuffer)
int	main (void)

Variables
int	g_testsPassed = 0
int	g_testsFailed = 0

Detailed Description

Test latency estimates.

Author

Ross Bencina rossb.nosp@m.@aud.nosp@m.iomul.nosp@m.ch.c.nosp@m.om

Phil Burk philb.nosp@m.urk@.nosp@m.softs.nosp@m.ynth.nosp@m..com

Macro Definition Documentation

FRAMES_PER_BUFFER

#define FRAMES_PER_BUFFER   (64)

M_PI

#define M_PI   (3.14159265)

Referenced by main().

NUM_SECONDS

#define NUM_SECONDS   (5)

Referenced by paqaCheckLatency().

SAMPLE_RATE

#define SAMPLE_RATE   (44100)

Referenced by main().

TABLE_SIZE

#define TABLE_SIZE   (200)

Referenced by main().

Function Documentation

main()

int main

(

void

)

References PaStreamParameters::channelCount, PaDeviceInfo::defaultHighOutputLatency, PaDeviceInfo::defaultLowOutputLatency, PaDeviceInfo::defaultSampleRate, PaStreamParameters::device, PaDeviceInfo::hostApi, PaStreamParameters::hostApiSpecificStreamInfo, paTestData::left_phase, M_PI, PaDeviceInfo::name, PaHostApiInfo::name, Pa_GetDefaultOutputDevice(), Pa_GetDeviceInfo(), Pa_GetErrorText(), Pa_GetHostApiInfo(), Pa_Initialize(), Pa_Terminate(), paFloat32, paFramesPerBufferUnspecified, paNoDevice, paNoError, paqaCheckLatency(), paTestData::right_phase, SAMPLE_RATE, PaStreamParameters::sampleFormat, paTestData::sine, PaStreamParameters::suggestedLatency, and TABLE_SIZE.

paqaCheckLatency()

PaError paqaCheckLatency	(	PaStreamParameters *	outputParamsPtr,
		paTestData *	dataPtr,
		double	sampleRate,
		unsigned long	framesPerBuffer )

References paTestData::callbackCount, PaStreamInfo::inputLatency, paTestData::maxDeltaDacTime, paTestData::maxFramesPerBuffer, paTestData::minDeltaDacTime, paTestData::minFramesPerBuffer, NUM_SECONDS, PaStreamInfo::outputLatency, Pa_CloseStream(), Pa_GetStreamInfo(), Pa_OpenStream(), Pa_Sleep(), Pa_StartStream(), Pa_StopStream(), paClipOff, paFramesPerBufferUnspecified, paNoError, and PaStreamParameters::suggestedLatency.

Referenced by main().

Variable Documentation

g_testsFailed

int g_testsFailed = 0

g_testsPassed

int g_testsPassed = 0

Accumulate counts for how many tests pass or fail.