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/** @file patest_buffer.c
@ingroup test_src
@brief Test opening streams with different buffer sizes.
@author Phil Burk http://www.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 <stdlib.h>
#include <math.h>
#include "portaudio.h"
#define NUM_SECONDS (3)
#define SAMPLE_RATE (44100)
#ifndef M_PI
#define M_PI (3.14159265)
#endif
#define TABLE_SIZE (200)
#define BUFFER_TABLE 14
long buffer_table[] = {paFramesPerBufferUnspecified,16,32,64,128,200,256,500,512,600,723,1000,1024,2345};
typedef struct
{
short sine[TABLE_SIZE];
int left_phase;
int right_phase;
unsigned int sampsToGo;
}
paTestData;
PaError TestOnce( int buffersize, PaDeviceIndex );
/* 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( const void *inputBuffer, void *outputBuffer,
unsigned long framesPerBuffer,
const PaStreamCallbackTimeInfo* timeInfo,
PaStreamCallbackFlags statusFlags,
void *userData )
{
paTestData *data = (paTestData*)userData;
short *out = (short*)outputBuffer;
unsigned int i;
int finished = 0;
(void) inputBuffer; /* Prevent "unused variable" warnings. */
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;
}
/*******************************************************************/
int main(int argc, char **args);
int main(int argc, char **args)
{
int i;
int device = -1;
PaError err;
printf("Test opening streams with different buffer sizes\n");
if( argc > 1 ) {
device=atoi( args[1] );
printf("Using device number %d.\n\n", device );
} else {
printf("Using default device.\n\n" );
}
for (i = 0 ; i < BUFFER_TABLE; i++)
{
printf("Buffer size %ld\n", buffer_table[i]);
err = TestOnce(buffer_table[i], device);
if( err < 0 ) return 0;
}
return 0;
}
PaError TestOnce( int buffersize, PaDeviceIndex device )
{
PaStreamParameters outputParameters;
PaStream *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;
if( device == -1 )
outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
else
outputParameters.device = device ;
if (outputParameters.device == paNoDevice) {
fprintf(stderr,"Error: No default output device.\n");
goto error;
}
outputParameters.channelCount = 2; /* stereo output */
outputParameters.sampleFormat = paInt16; /* 32 bit floating point output */
outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;
outputParameters.hostApiSpecificStreamInfo = NULL;
err = Pa_OpenStream(
&stream,
NULL, /* no input */
&outputParameters,
SAMPLE_RATE,
buffersize, /* frames per buffer */
(paClipOff | paDitherOff),
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*NUM_SECONDS);
err = Pa_CloseStream( stream );
if( err != paNoError ) goto error;
Pa_Terminate();
return paNoError;
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 ) );
fprintf( stderr, "Host Error message: %s\n", Pa_GetLastHostErrorInfo()->errorText );
return err;
}
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