SV platform dependency builds

/** @file patest_maxsines.c

        @ingroup test_src

        @brief How many sine waves can we calculate and play in less than 80% CPU Load.

        @author Ross Bencina <rossb@audiomulch.com>

        @author Phil Burk <philburk@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 MAX_SINES     (2000)

#define MAX_USAGE     (0.5)

#define SAMPLE_RATE   (44100)

#define FREQ_TO_PHASE_INC(freq)   (freq/(float)SAMPLE_RATE)

#define MIN_PHASE_INC  FREQ_TO_PHASE_INC(200.0f)

#define MAX_PHASE_INC  (MIN_PHASE_INC * (1 << 5))

#define FRAMES_PER_BUFFER  (512)

#ifndef M_PI

#define M_PI  (3.14159265)

#endif

#define TWOPI (M_PI * 2.0)

#define TABLE_SIZE   (1024)

typedef struct paTestData

{

    int numSines;

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

    float phases[MAX_SINES];

}

paTestData;

/* Convert phase between 0.0 and 1.0 to sine value

 * using linear interpolation.

 */

float LookupSine( paTestData *data, float phase );

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;

    float outSample;

    float scaler;

    int numForScale;

    unsigned long i;

    int j;

    int finished = 0;

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

    /* Determine amplitude scaling factor */

    numForScale = data->numSines;

    if( numForScale < 8 ) numForScale = 8;  /* prevent pops at beginning */

    scaler = 1.0f / numForScale;

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

    {

        float output = 0.0;

        float phaseInc = MIN_PHASE_INC;

        float phase;

        for( j=0; j<data->numSines; j++ )

        {

            /* Advance phase of next oscillator. */

            phase = data->phases[j];

            phase += phaseInc;

            if( phase >= 1.0 ) phase -= 1.0;

            output += LookupSine(data, phase); 

            data->phases[j] = phase;

            phaseInc *= 1.02f;

            if( phaseInc > MAX_PHASE_INC ) phaseInc = MIN_PHASE_INC;

        }

        outSample = (float) (output * scaler);

        *out++ = outSample; /* Left */

        *out++ = outSample; /* Right */

    }

    return finished;

}

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

int main(void);

int main(void)

{

        int                 i;

    PaStream*           stream;

    PaStreamParameters  outputParameters;

    PaError             err;

    paTestData          data = {0};

    double              load;

    printf("PortAudio Test: output sine wave. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER);

    /* initialise sinusoidal wavetable */

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

    {

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

    }

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

    err = Pa_Initialize();

    if( err != paNoError )

        goto error;

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

    outputParameters.hostApiSpecificStreamInfo = NULL;

    outputParameters.suggestedLatency          = Pa_GetDeviceInfo(outputParameters.device)

                                                 ->defaultHighOutputLatency;

    err = Pa_OpenStream(&stream,

                        NULL,               /* no input */

                        &outputParameters,

                        SAMPLE_RATE,

                        FRAMES_PER_BUFFER,

                        paClipOff,          /* No out of range samples should occur. */

                        patestCallback,

                        &data);

    if( err != paNoError )

        goto error;

    err = Pa_StartStream( stream );

    if( err != paNoError )

        goto error;

    /* Play an increasing number of sine waves until we hit MAX_USAGE */

    do  {

        data.numSines += 10;

        Pa_Sleep(200);

        load = Pa_GetStreamCpuLoad(stream);

        printf("numSines = %d, CPU load = %f\n", data.numSines, load );

        fflush(stdout);

        } while((load < MAX_USAGE) && (data.numSines < MAX_SINES));

    Pa_Sleep(2000);     /* Stay for 2 seconds at max CPU. */

    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;

}