SV platform dependency builds

/** @file paex_saw.c

        @ingroup examples_src

        @brief Play a simple (aliasing) sawtooth wave.

        @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 <math.h>

#include "portaudio.h"

#define NUM_SECONDS   (4)

#define SAMPLE_RATE   (44100)

typedef struct

{

    float left_phase;

    float right_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 )

{

    /* Cast data passed through stream to our structure. */

    paTestData *data = (paTestData*)userData;

    float *out = (float*)outputBuffer;

    unsigned int i;

    (void) inputBuffer; /* Prevent unused variable warning. */

    for( i=0; i<framesPerBuffer; i++ )

    {

        *out++ = data->left_phase;  /* left */

        *out++ = data->right_phase;  /* right */

        /* Generate simple sawtooth phaser that ranges between -1.0 and 1.0. */

        data->left_phase += 0.01f;

        /* When signal reaches top, drop back down. */

        if( data->left_phase >= 1.0f ) data->left_phase -= 2.0f;

        /* higher pitch so we can distinguish left and right. */

        data->right_phase += 0.03f;

        if( data->right_phase >= 1.0f ) data->right_phase -= 2.0f;

    }

    return 0;

}

/*******************************************************************/

static paTestData data;

int main(void);

int main(void)

{

    PaStream *stream;

    PaError err;

    printf("PortAudio Test: output sawtooth wave.\n");

    /* Initialize our data for use by callback. */

    data.left_phase = data.right_phase = 0.0;

    /* Initialize library before making any other calls. */

    err = Pa_Initialize();

    if( err != paNoError ) goto error;

    /* Open an audio I/O stream. */

    err = Pa_OpenDefaultStream( &stream,

                                0,          /* no input channels */

                                2,          /* stereo output */

                                paFloat32,  /* 32 bit floating point output */

                                SAMPLE_RATE,

                                256,        /* frames per buffer */

                                patestCallback,

                                &data );

    if( err != paNoError ) goto error;

    err = Pa_StartStream( stream );

    if( err != paNoError ) goto error;

    /* Sleep for several seconds. */

    Pa_Sleep(NUM_SECONDS*1000);

    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 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;

}