SV platform dependency builds

/** @file paex_sine.c

        @ingroup examples_src

        @brief Play a sine wave for several seconds.

        @author Ross Bencina <rossb@audiomulch.com>

    @author Phil Burk <philburk@softsynth.com>

*/

/*

 * $Id: paex_sine.c 1752 2011-09-08 03:21:55Z philburk $

 *

 * 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)

#define FRAMES_PER_BUFFER  (64)

#ifndef M_PI

#define M_PI  (3.14159265)

#endif

#define TABLE_SIZE   (200)

class Sine

{

public:

    Sine() : stream(0), left_phase(0), right_phase(0)

    {

        /* initialise sinusoidal wavetable */

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

        {

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

        }

        sprintf( message, "No Message" );

    }

    bool open(PaDeviceIndex index)

    {

        PaStreamParameters outputParameters;

        outputParameters.device = index;

        if (outputParameters.device == paNoDevice) {

            return false;

        }

        const PaDeviceInfo* pInfo = Pa_GetDeviceInfo(index);

        if (pInfo != 0)

        {

            printf("Output device name: '%s'\r", pInfo->name);

        }

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

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

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

        outputParameters.hostApiSpecificStreamInfo = NULL;

        PaError err = Pa_OpenStream(

            &stream,

            NULL, /* no input */

            &outputParameters,

            SAMPLE_RATE,

            paFramesPerBufferUnspecified,

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

            &Sine::paCallback,

            this            /* Using 'this' for userData so we can cast to Sine* in paCallback method */

            );

        if (err != paNoError)

        {

            /* Failed to open stream to device !!! */

            return false;

        }

        err = Pa_SetStreamFinishedCallback( stream, &Sine::paStreamFinished );

        if (err != paNoError)

        {

            Pa_CloseStream( stream );

            stream = 0;

            return false;

        }

        return true;

    }

    bool close()

    {

        if (stream == 0)

            return false;

        PaError err = Pa_CloseStream( stream );

        stream = 0;

        return (err == paNoError);

    }

    bool start()

    {

        if (stream == 0)

            return false;

        PaError err = Pa_StartStream( stream );

        return (err == paNoError);

    }

    bool stop()

    {

        if (stream == 0)

            return false;

        PaError err = Pa_StopStream( stream );

        return (err == paNoError);

    }

private:

    /* The instance callback, where we have access to every method/variable in object of class Sine */

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

        unsigned long framesPerBuffer,

        const PaStreamCallbackTimeInfo* timeInfo,

        PaStreamCallbackFlags statusFlags)

    {

        float *out = (float*)outputBuffer;

        unsigned long i;

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

        (void) statusFlags;

        (void) inputBuffer;

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

        {

            *out++ = sine[left_phase];  /* left */

            *out++ = sine[right_phase];  /* right */

            left_phase += 1;

            if( left_phase >= TABLE_SIZE ) left_phase -= TABLE_SIZE;

            right_phase += 3; /* higher pitch so we can distinguish left and right. */

            if( right_phase >= TABLE_SIZE ) right_phase -= TABLE_SIZE;

        }

        return paContinue;

    }

    /* 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 paCallback( const void *inputBuffer, void *outputBuffer,

        unsigned long framesPerBuffer,

        const PaStreamCallbackTimeInfo* timeInfo,

        PaStreamCallbackFlags statusFlags,

        void *userData )

    {

        /* Here we cast userData to Sine* type so we can call the instance method paCallbackMethod, we can do that since 

           we called Pa_OpenStream with 'this' for userData */

        return ((Sine*)userData)->paCallbackMethod(inputBuffer, outputBuffer,

            framesPerBuffer,

            timeInfo,

            statusFlags);

    }

    void paStreamFinishedMethod()

    {

        printf( "Stream Completed: %s\n", message );

    }

    /*

     * This routine is called by portaudio when playback is done.

     */

    static void paStreamFinished(void* userData)

    {

        return ((Sine*)userData)->paStreamFinishedMethod();

    }

    PaStream *stream;

    float sine[TABLE_SIZE];

    int left_phase;

    int right_phase;

    char message[20];

};

class ScopedPaHandler

{

public:

    ScopedPaHandler()

        : _result(Pa_Initialize())

    {

    }

    ~ScopedPaHandler()

    {

        if (_result == paNoError)

        {

            Pa_Terminate();

        }

    }

    PaError result() const { return _result; }

private:

    PaError _result;

};

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

int main(void);

int main(void)

{

    Sine sine;

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

    ScopedPaHandler paInit;

    if( paInit.result() != paNoError ) goto error;

    if (sine.open(Pa_GetDefaultOutputDevice()))

    {

        if (sine.start())

        {

            printf("Play for %d seconds.\n", NUM_SECONDS );

            Pa_Sleep( NUM_SECONDS * 1000 );

            sine.stop();

        }

        sine.close();

    }

    printf("Test finished.\n");

    return paNoError;

error:

    fprintf( stderr, "An error occured while using the portaudio stream\n" );

    fprintf( stderr, "Error number: %d\n", paInit.result() );

    fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( paInit.result() ) );

    return 1;

}