/* * $Id: patest_many.c,v 1.2 2003/03/02 08:01:42 dmazzoni 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 MACINTOSHint 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;    }}#elseint 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;}#endifPaError 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");    fflush(stdout);    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;}