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/** @file patest_hang.c
@ingroup test_src
@brief Play a sine then hang audio callback to test watchdog.
@author Ross Bencina <rossb@audiomulch.com>
@author Phil Burk <philburk@softsynth.com>
*/
/*
* $Id$
*
* This program uses the PortAudio Portable Audio Library.
* For more information see: http://www.portaudio.com
* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* The text above constitutes the entire PortAudio license; however,
* the PortAudio community also makes the following non-binding requests:
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version. It is also
* requested that these non-binding requests be included along with the
* license above.
*/
#include <stdio.h>
#include <math.h>
#include "portaudio.h"
#define SAMPLE_RATE (44100)
#define FRAMES_PER_BUFFER (1024)
#ifndef M_PI
#define M_PI (3.14159265)
#endif
#define TWOPI (M_PI * 2.0)
typedef struct paTestData
{
int sleepFor;
double phase;
}
paTestData;
/* This routine will be called by the PortAudio engine when audio is needed.
** It may called at interrupt level on some machines so don't do anything
** that could mess up the system like calling malloc() or free().
*/
static int patestCallback( const void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData )
{
paTestData *data = (paTestData*)userData;
float *out = (float*)outputBuffer;
unsigned long i;
int finished = 0;
double phaseInc = 0.02;
double phase = data->phase;
(void) inputBuffer; /* Prevent unused argument warning. */
for( i=0; i<framesPerBuffer; i++ )
{
phase += phaseInc;
if( phase > TWOPI ) phase -= TWOPI;
/* This is not a very efficient way to calc sines. */
*out++ = (float) sin( phase ); /* mono */
}
if( data->sleepFor > 0 )
{
Pa_Sleep( data->sleepFor );
}
data->phase = phase;
return finished;
}
/*******************************************************************/
int main(void);
int main(void)
{
PaStream* stream;
PaStreamParameters outputParameters;
PaError err;
int i;
paTestData data = {0};
printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n",
SAMPLE_RATE, FRAMES_PER_BUFFER );
err = Pa_Initialize();
if( err != paNoError ) goto error;
outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device. */
if (outputParameters.device == paNoDevice) {
fprintf(stderr,"Error: No default output device.\n");
goto error;
}
outputParameters.channelCount = 1; /* Mono output. */
outputParameters.sampleFormat = paFloat32; /* 32 bit floating point. */
outputParameters.hostApiSpecificStreamInfo = NULL;
outputParameters.suggestedLatency = Pa_GetDeviceInfo(outputParameters.device)
->defaultLowOutputLatency;
err = Pa_OpenStream(&stream,
NULL, /* No input. */
&outputParameters,
SAMPLE_RATE,
FRAMES_PER_BUFFER,
paClipOff, /* No out of range samples. */
patestCallback,
&data);
if (err != paNoError) goto error;
err = Pa_StartStream( stream );
if( err != paNoError ) goto error;
/* Gradually increase sleep time. */
/* Was: for( i=0; i<10000; i+= 1000 ) */
for(i=0; i <= 1000; i += 100)
{
printf("Sleep for %d milliseconds in audio callback.\n", i );
data.sleepFor = i;
Pa_Sleep( ((i<1000) ? 1000 : i) );
}
printf("Suffer for 10 seconds.\n");
Pa_Sleep( 10000 );
err = Pa_StopStream( stream );
if( err != paNoError ) goto error;
err = Pa_CloseStream( stream );
if( err != paNoError ) goto error;
Pa_Terminate();
printf("Test finished.\n");
return err;
error:
Pa_Terminate();
fprintf( stderr, "An error occurred while using the portaudio stream\n" );
fprintf( stderr, "Error number: %d\n", err );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
return err;
}
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