SV platform dependency builds

/** @file patest_dither.c

        @ingroup test_src

        @brief Attempt to hear difference between dithered and non-dithered signal.

        This only has an effect if the native format is 16 bit.

        @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   (5)

#define SAMPLE_RATE   (44100)

#ifndef M_PI

#define M_PI  (3.14159265)

#endif

#define TABLE_SIZE   (200)

typedef struct paTestData

{

    float sine[TABLE_SIZE];

    float amplitude;

    int   left_phase;

    int   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 sineCallback( const void *inputBuffer, void *outputBuffer,

                         unsigned long framesPerBuffer,

                                     const PaStreamCallbackTimeInfo *timeInfo,

                                     PaStreamCallbackFlags statusFlags, void *userData )

{

    paTestData *data = (paTestData*)userData;

    float *out = (float*)outputBuffer;

    float amplitude = data->amplitude;

    unsigned int i;

    (void) inputBuffer;

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

    {

        *out++ = amplitude * data->sine[data->left_phase];  /* left */

        *out++ = amplitude * 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;

    }

    return 0;

}

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

/*

    V18 version did not call Pa_Terminate() if Pa_Initialize() failed.

    This V19 version ALWAYS calls Pa_Terminate(). PS.

*/

PaError PlaySine( paTestData *data, PaStreamFlags flags, float amplitude );

PaError PlaySine( paTestData *data, PaStreamFlags flags, float amplitude )

{

    PaStream*           stream;

    PaStreamParameters  outputParameters;

    PaError             err;

    data->left_phase = data->right_phase = 0;

    data->amplitude  = amplitude;

    err = Pa_Initialize();

    if (err != paNoError)

        goto done;

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

    if (outputParameters.device == paNoDevice) {

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

      goto done;

    }

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

    outputParameters.hostApiSpecificStreamInfo = NULL;

    outputParameters.sampleFormat = paFloat32;      /* 32 bit floating point output. */

                                                    /* When you change this, also    */

                                                    /* adapt the callback routine!   */ 

    outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )

                                        ->defaultLowOutputLatency;   /* Low latency. */

    err = Pa_OpenStream( &stream,

                         NULL,                              /* No input. */

                         &outputParameters,

                         SAMPLE_RATE,

                         1024,                              /* frames per buffer */

                         flags,

                         sineCallback,

                         (void*)data );

    if (err != paNoError)

        goto done;

    err = Pa_StartStream( stream );

    if (err != paNoError)

        goto done;

    Pa_Sleep( NUM_SECONDS * 1000 );

    printf("CPULoad = %8.6f\n", Pa_GetStreamCpuLoad(stream));

    err = Pa_CloseStream( stream );

done:

    Pa_Sleep( 250 );  /* Just a small silence. */

    Pa_Terminate();

    return err;

}

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

int main(void);

int main(void)

{

    PaError     err;

    paTestData  DATA;

    int         i;

    float       amplitude = 4.0 / (1<<15);

    printf("PortAudio Test: output EXTREMELY QUIET sine wave with and without dithering.\n");

    /* initialise sinusoidal wavetable */

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

    {

        DATA.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );

    }

    printf("\nNo treatment..\n"); fflush(stdout);

    err = PlaySine( &DATA, paClipOff | paDitherOff, amplitude );

    if( err < 0 ) goto done;

    printf("\nClip..\n");

    fflush(stdout);

    err = PlaySine( &DATA, paDitherOff, amplitude );

    if( err < 0 ) goto done;

    printf("\nClip and Dither..\n");

    fflush(stdout);

    err = PlaySine( &DATA, paNoFlag, amplitude );

done:

    if (err)

        {

        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 ) );

        err = 1; /* Though PlaySine() already called Pa_Terminate(), */

        }        /* we may still call Pa_GetErrorText().             */

    else

        printf("\n(Don't forget to turn the VOLUME DOWN after listening so carefully.)\n");

    return err;  /* 0 or 1. */

}