Visual C++ .NET - Generacion de Honda. Placa de sonido

#include <iostream>

#include "portaudio.h"

#define SAMPLE_RATE  (44100)

#define FRAMES_PER_BUFFER (64)

#define PI (3.14159265)

typedef struct

{

    float phase;

} paTestData;

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

                      unsigned long framesPerBuffer,

                      const PaStreamCallbackTimeInfo* timeInfo,

                      PaStreamCallbackFlags statusFlags,

                      void* userData)

{

    paTestData* data = (paTestData*)userData;

    float* out = (float*)outputBuffer;

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

    {

        *out++ = static_cast<float>(0.5f * sin(data->phase * 2.0f * PI));

        data->phase += 0.01f;

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

    }

    return paContinue;

}

int main()

{

    PaStream* stream;

    PaError err;

    paTestData data;

    err = Pa_Initialize();

    if (err != paNoError) goto error;

    err = Pa_OpenDefaultStream(&stream,

                               0,          // no input channels

                               1,          // mono output

                               paFloat32,  // 32 bit floating point output

                               SAMPLE_RATE,

                               FRAMES_PER_BUFFER,

                               paCallback,

                               &data);

    if (err != paNoError) goto error;

    err = Pa_StartStream(stream);

    if (err != paNoError) goto error;

    Pa_Sleep(5000);  // Run for 5 seconds

    err = Pa_StopStream(stream);

    if (err != paNoError) goto error;

    err = Pa_CloseStream(stream);

    if (err != paNoError) goto error;

    Pa_Terminate();

    return 0;

error:

    Pa_Terminate();

    fprintf(stderr, "An error occurred while using the PortAudio stream\n");

    fprintf(stderr, "Error number: %d\n", err);

    fprintf(stderr, "Error message: %s\n", Pa_GetErrorText(err));

    return -1;

}