#define _USE_BUFFER_SIZE
#define _USE_GET_PERIODS

#define ALSA_PCM_NEW_HW_PARAMS_API

#include <alsa/asoundlib.h>

int main( int argc, char **argv )
{
    int rc;
    snd_pcm_t *handle;
    snd_pcm_hw_params_t *params;
    unsigned int val, val2;
    int dir=0;
    snd_pcm_uframes_t frames;

    /* Oeffen PCM Device für Playback */
    rc = snd_pcm_open( &handle, "default",
            SND_PCM_STREAM_PLAYBACK, 0 );
    if ( rc<0 ) {
        fprintf( stderr, "unable to open device: %s\n",
                snd_strerror( rc ));
        exit( 1 );
    }

    /* Lege ein Hardware-Parameters Objekt an */
    snd_pcm_hw_params_alloca( &params );

    /* Setze Default-Werte ein */
    snd_pcm_hw_params_any(handle, params);

    /* Gewünschte Params einsetzen ... */

    /* Interleave Mode */
    snd_pcm_hw_params_set_access(handle, params,
            SND_PCM_ACCESS_RW_INTERLEAVED);

    /* Signed 16-bit little endian format */
    snd_pcm_hw_params_set_format(handle, params,
            SND_PCM_FORMAT_S16_LE );

    /* 2-Kanaele (stereo) */
    snd_pcm_hw_params_set_channels(handle, params, 2);

    /* 44.100 Hz */
    val = 44100;
    snd_pcm_hw_params_set_rate_near(handle,
            params, &val, &dir);

    /* Schreibe params in Treiber */
    rc = snd_pcm_hw_params( handle, params );
    if ( rc<0 ) {
        fprintf( stderr, "unable to set hw parameters: %s\n",
                snd_strerror( rc ));
        exit( 1 );
    }

    /* Zeige Informationen über PCM Interface an */
    printf( "PCM Handle name: '%s'\n",
            snd_pcm_name( handle ));


    snd_pcm_hw_params_get_buffer_time( params, &val, &dir );
    printf( "buffer time: %d mu-Sekunden\n", val );

#ifdef _USE_BUFFER_SIZE
    snd_pcm_hw_params_get_buffer_size( params, (snd_pcm_uframes_t *)&val);
    printf( "buffer size: %d frames\n", val );
#endif
#ifdef _USE_GET_PERIODS
    snd_pcm_hw_params_get_periods( params,
            &val, &dir );
    printf( "periods per buffer: %d frames\n", val );
#endif

    snd_pcm_close( handle );
    return 0;
}