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/*
* $Id: patest_many.c,v 1.1.1.1 2003-05-09 16:03:56 ggeiger Exp $
* patest_many.c
* Start and stop the PortAudio Driver multiple times.
*
* Author: Phil Burk http://www.softsynth.com
*
* 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.
*
* 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.
*
* 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.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "portaudio.h"
#define NUM_SECONDS (1)
#define SAMPLE_RATE (44100)
#ifndef M_PI
#define M_PI (3.14159265)
#endif
#define TABLE_SIZE (200)
typedef struct
{
short sine[TABLE_SIZE];
int left_phase;
int right_phase;
unsigned int sampsToGo;
}
paTestData;
PaError TestOnce( void );
static int patest1Callback( void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer,
PaTimestamp outTime, void *userData );
/* 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 patest1Callback( void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer,
PaTimestamp outTime, void *userData )
{
paTestData *data = (paTestData*)userData;
short *out = (short*)outputBuffer;
unsigned int i;
int finished = 0;
(void) inputBuffer; /* Prevent "unused variable" warnings. */
(void) outTime;
if( data->sampsToGo < framesPerBuffer )
{
/* final buffer... */
for( i=0; i<data->sampsToGo; i++ )
{
*out++ = data->sine[data->left_phase]; /* left */
*out++ = data->sine[data->right_phase]; /* right */
data->left_phase += 1;
if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
}
/* zero remainder of final buffer */
for( ; i<framesPerBuffer; i++ )
{
*out++ = 0; /* left */
*out++ = 0; /* right */
}
finished = 1;
}
else
{
for( i=0; i<framesPerBuffer; i++ )
{
*out++ = data->sine[data->left_phase]; /* left */
*out++ = data->sine[data->right_phase]; /* right */
data->left_phase += 1;
if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE;
data->right_phase += 3; /* higher pitch so we can distinguish left and right. */
if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE;
}
data->sampsToGo -= framesPerBuffer;
}
return finished;
}
/*******************************************************************/
#ifdef MACINTOSH
int main(void);
int main(void)
{
int i;
PaError err;
int numLoops = 10;
printf("Loop %d times.\n", numLoops );
for( i=0; i<numLoops; i++ )
{
printf("Loop %d out of %d.\n", i+1, numLoops );
err = TestOnce();
if( err < 0 ) return 0;
}
}
#else
int main(int argc, char **argv);
int main(int argc, char **argv)
{
PaError err;
int i, numLoops = 10;
if( argc > 1 )
{
numLoops = atoi(argv[1]);
}
for( i=0; i<numLoops; i++ )
{
printf("Loop %d out of %d.\n", i+1, numLoops );
err = TestOnce();
if( err < 0 ) return 1;
}
printf("Test complete.\n");
return 0;
}
#endif
PaError TestOnce( void )
{
PortAudioStream *stream;
PaError err;
paTestData data;
int i;
int totalSamps;
/* initialise sinusoidal wavetable */
for( i=0; i<TABLE_SIZE; i++ )
{
data.sine[i] = (short) (32767.0 * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ));
}
data.left_phase = data.right_phase = 0;
data.sampsToGo = totalSamps = NUM_SECONDS * SAMPLE_RATE; /* Play for a few seconds. */
err = Pa_Initialize();
if( err != paNoError ) goto error;
err = Pa_OpenStream(
&stream,
paNoDevice,/* default input device */
0, /* no input */
paInt16, /* sample format */
NULL,
Pa_GetDefaultOutputDeviceID(), /* default output device */
2, /* stereo output */
paInt16, /* sample format */
NULL,
SAMPLE_RATE,
1024, /* frames per buffer */
8, /* number of buffers, if zero then use default minimum */
paClipOff, /* we won't output out of range samples so don't bother clipping them */
patest1Callback,
&data );
if( err != paNoError ) goto error;
err = Pa_StartStream( stream );
if( err != paNoError ) goto error;
printf("Waiting for sound to finish.\n");
Pa_Sleep(1000);
err = Pa_CloseStream( stream );
if( err != paNoError ) goto error;
Pa_Terminate();
return paNoError;
error:
Pa_Terminate();
fprintf( stderr, "An error occured 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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