SV platform dependency builds

/** @file pa_fuzz.c

        @ingroup examples_src

    @brief Distort input like a fuzz box.

        @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"

/*

** Note that many of the older ISA sound cards on PCs do NOT support

** full duplex audio (simultaneous record and playback).

** And some only support full duplex at lower sample rates.

*/

#define SAMPLE_RATE         (44100)

#define PA_SAMPLE_TYPE      paFloat32

#define FRAMES_PER_BUFFER   (64)

typedef float SAMPLE;

float CubicAmplifier( float input );

static int fuzzCallback( const void *inputBuffer, void *outputBuffer,

                         unsigned long framesPerBuffer,

                         const PaStreamCallbackTimeInfo* timeInfo,

                         PaStreamCallbackFlags statusFlags,

                         void *userData );

/* Non-linear amplifier with soft distortion curve. */

float CubicAmplifier( float input )

{

    float output, temp;

    if( input < 0.0 )

    {

        temp = input + 1.0f;

        output = (temp * temp * temp) - 1.0f;

    }

    else

    {

        temp = input - 1.0f;

        output = (temp * temp * temp) + 1.0f;

    }

    return output;

}

#define FUZZ(x) CubicAmplifier(CubicAmplifier(CubicAmplifier(CubicAmplifier(x))))

static int gNumNoInputs = 0;

/* This routine will be called by the PortAudio engine when audio is needed.

** It may be 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 fuzzCallback( const void *inputBuffer, void *outputBuffer,

                         unsigned long framesPerBuffer,

                         const PaStreamCallbackTimeInfo* timeInfo,

                         PaStreamCallbackFlags statusFlags,

                         void *userData )

{

    SAMPLE *out = (SAMPLE*)outputBuffer;

    const SAMPLE *in = (const SAMPLE*)inputBuffer;

    unsigned int i;

    (void) timeInfo; /* Prevent unused variable warnings. */

    (void) statusFlags;

    (void) userData;

    if( inputBuffer == NULL )

    {

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

        {

            *out++ = 0;  /* left - silent */

            *out++ = 0;  /* right - silent */

        }

        gNumNoInputs += 1;

    }

    else

    {

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

        {

            *out++ = FUZZ(*in++);  /* left - distorted */

            *out++ = *in++;          /* right - clean */

        }

    }

    return paContinue;

}

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

int main(void);

int main(void)

{

    PaStreamParameters inputParameters, outputParameters;

    PaStream *stream;

    PaError err;

    err = Pa_Initialize();

    if( err != paNoError ) goto error;

    inputParameters.device = Pa_GetDefaultInputDevice(); /* default input device */

    if (inputParameters.device == paNoDevice) {

      fprintf(stderr,"Error: No default input device.\n");

      goto error;

    }

    inputParameters.channelCount = 2;       /* stereo input */

    inputParameters.sampleFormat = PA_SAMPLE_TYPE;

    inputParameters.suggestedLatency = Pa_GetDeviceInfo( inputParameters.device )->defaultLowInputLatency;

    inputParameters.hostApiSpecificStreamInfo = NULL;

    outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */

    if (outputParameters.device == paNoDevice) {

      fprintf(stderr,"Error: No default output device.\n");

      goto error;

    }

    outputParameters.channelCount = 2;       /* stereo output */

    outputParameters.sampleFormat = PA_SAMPLE_TYPE;

    outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency;

    outputParameters.hostApiSpecificStreamInfo = NULL;

    err = Pa_OpenStream(

              &stream,

              &inputParameters,

              &outputParameters,

              SAMPLE_RATE,

              FRAMES_PER_BUFFER,

              0, /* paClipOff, */  /* we won't output out of range samples so don't bother clipping them */

              fuzzCallback,

              NULL );

    if( err != paNoError ) goto error;

    err = Pa_StartStream( stream );

    if( err != paNoError ) goto error;

    printf("Hit ENTER to stop program.\n");

    getchar();

    err = Pa_CloseStream( stream );

    if( err != paNoError ) goto error;

    printf("Finished. gNumNoInputs = %d\n", gNumNoInputs );

    Pa_Terminate();

    return 0;

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 -1;

}