//! From BeBook examples.


#include <Application.h>
#include <Sound.h>
#include <SoundPlayer.h>


typedef struct cookie_record {
        float value;
        float direction;
} cookie_record;


void
BufferProc(void* _cookie, void* buffer, size_t size,
        const media_raw_audio_format& format)
{
        // We're going to be cheap and only work for floating-point audio

        if (format.format != media_raw_audio_format::B_AUDIO_FLOAT)
                return;

        // Now fill the buffer with sound!

        cookie_record* cookie = (cookie_record*)_cookie;
        uint32 channelCount = format.channel_count;
        size_t floatSize = size / 4;
        float* buf = (float*)buffer;

        for (size_t i = 0; i < floatSize; i += channelCount) {
                for (size_t j = 0; j < channelCount; j++) {
                        buf[i + j] = cookie->value;
                }

                if (cookie->direction == 1.0 && cookie->value >= 1.0)
                        cookie->direction = -1.0;
                else if (cookie->direction == -1.0 && cookie->value <= -1.0)
                        cookie->direction = 1.0;

                cookie->value += cookie->direction * (1.0 / 64.0);
        }
}


int
main()
{
        BApplication app("application/dzwiek");

        cookie_record cookie;

        cookie.value = 0.0;
        cookie.direction = 1.0;

        BSoundPlayer player("wave_player", BufferProc, NULL, &cookie);
        player.Start();
        player.SetHasData(true);

        sleep(5);

        player.Stop();
}