Kontron KTAM3874-pITX - Manual (Page 115)

KTD-S0057-I Page 111 Linux® Programming Examples (DebianTM)
KTAM3874/pITX Software Guide
if ((err = snd_pcm_hw_params_any (capture_handle, hw_params)) < 0)
{
fprintf (stderr, "Cannot initialize hardware parameter structure (%s)\n", snd_strerror (err));
return EXIT_FAILURE;
}
if ((err = snd_pcm_hw_params_set_access (capture_handle, hw_params,
SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
{
fprintf (stderr, "Cannot set access type (%s)\n", snd_strerror (err));
return EXIT_FAILURE;
}
if ((err = snd_pcm_hw_params_set_format (capture_handle, hw_params, SND_PCM_FORMAT_S16_LE)) < 0)
{
fprintf (stderr, "Cannot set sample format (%s)\n", snd_strerror (err));
return EXIT_FAILURE;
}
rrate = RATE_44kHz;
if ((err = snd_pcm_hw_params_set_rate_near (capture_handle, hw_params, &rrate, 0)) < 0)
{
fprintf (stderr, "Cannot set sample rate (%s)\n", snd_strerror (err));
return EXIT_FAILURE;
}
if ((err = snd_pcm_hw_params_set_channels (capture_handle, hw_params, MONO)) < 0)
{
fprintf (stderr, "Cannot set channel count (%s)\n", snd_strerror (err));
return EXIT_FAILURE;
}
if ((err = snd_pcm_hw_params (capture_handle, hw_params)) < 0)
{
fprintf (stderr, "Cannot set parameters (%s)\n", snd_strerror (err));
return EXIT_FAILURE;
}
snd_pcm_hw_params_free (hw_params);
if ((err = snd_pcm_prepare (capture_handle)) < 0)
{
fprintf (stderr, "Cannot prepare audio interface for use (%s)\n", snd_strerror (err));
return EXIT_FAILURE;
}
if ((err = snd_pcm_readi (capture_handle, buf, BUFSIZE)) != BUFSIZE)
{
fprintf (stderr, "read from audio interface failed (%s)\n", snd_strerror (err));
return EXIT_FAILURE;
}
snd_pcm_close (capture_handle);