SV platform dependency builds

/** @file

        @ingroup test_src

        @brief Hear the latency caused by big buffers.

        Play a sine wave and change frequency based on letter input.

        @author Phil Burk <philburk@softsynth.com>, and Darren Gibbs

*/

/*

 * $Id$

 *

 * 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 OUTPUT_DEVICE       (Pa_GetDefaultOutputDevice())

#define SAMPLE_RATE         (44100)

#define FRAMES_PER_BUFFER   (64)

#define MIN_FREQ            (100.0f)

#define CalcPhaseIncrement(freq)  ((freq)/SAMPLE_RATE)

#ifndef M_PI

#define M_PI  (3.14159265)

#endif

#define TABLE_SIZE   (400)

typedef struct

{

    float sine[TABLE_SIZE + 1]; /* add one for guard point for interpolation */

    float phase_increment;

    float left_phase;

    float right_phase;

}

paTestData;

float LookupSine( paTestData *data, float phase );

/* Convert phase between and 1.0 to sine value

 * using linear interpolation.

 */

float LookupSine( paTestData *data, float phase )

{

    float fIndex = phase*TABLE_SIZE;

    int   index = (int) fIndex;

    float fract = fIndex - index;

    float lo = data->sine[index];

    float hi = data->sine[index+1];

    float val = lo + fract*(hi-lo);

    return val;

}

/* 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 )

{

    paTestData *data = (paTestData*)userData;

    float *out = (float*)outputBuffer;

    int i;

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

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

    {

        *out++ = LookupSine(data, data->left_phase);  /* left */

        *out++ = LookupSine(data, data->right_phase);  /* right */

        data->left_phase += data->phase_increment;

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

        data->right_phase += (data->phase_increment * 1.5f); /* fifth above */

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

    }

    return 0;

}

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

int main(void);

int main(void)

{

    PaStream *stream;

    PaStreamParameters outputParameters;

    PaError err;

    paTestData data;

    int i;

    int done = 0;

    printf("PortAudio Test: enter letter then hit ENTER.\n" );

    /* initialise sinusoidal wavetable */

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

    {

        data.sine[i] = 0.90f * (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. );

    }

    data.sine[TABLE_SIZE] = data.sine[0]; /* set guard point. */

    data.left_phase = data.right_phase = 0.0;

    data.phase_increment = CalcPhaseIncrement(MIN_FREQ);

    err = Pa_Initialize();

    if( err != paNoError ) goto error;

    printf("PortAudio Test: output device = %d\n", OUTPUT_DEVICE );

    outputParameters.device = OUTPUT_DEVICE;

    if (outputParameters.device == paNoDevice) {

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

      goto error;

    }

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

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

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

    outputParameters.hostApiSpecificStreamInfo = NULL;

    printf("Requested output latency = %.4f seconds.\n", outputParameters.suggestedLatency );

    printf("%d frames per buffer.\n.", FRAMES_PER_BUFFER );

    err = Pa_OpenStream(

              &stream,

              NULL, /* no input */

              &outputParameters,

              SAMPLE_RATE,

              FRAMES_PER_BUFFER,

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

              patestCallback,

              &data );

    if( err != paNoError ) goto error;

    err = Pa_StartStream( stream );

    if( err != paNoError ) goto error;

    printf("Play ASCII keyboard. Hit 'q' to stop. (Use RETURN key on Mac)\n");

    fflush(stdout);

    while ( !done )

    {

        float  freq;

        int index;

        char c;

        do

        {

            c = getchar();

        }

        while( c < ' '); /* Strip white space and control chars. */

        if( c == 'q' ) done = 1;

        index = c % 26;

        freq = MIN_FREQ + (index * 40.0);

        data.phase_increment = CalcPhaseIncrement(freq);

    }

    printf("Call Pa_StopStream()\n");

    err = Pa_StopStream( 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;

}