+ /* get volume from alsa */
+ snd_mixer_t *handle;
+ snd_mixer_elem_t *pcm_mixer, *mas_mixer;
+ snd_mixer_selem_id_t *vol_info, *mute_info;
+ snd_mixer_open(&handle, 0);
+ snd_mixer_attach(handle, soundcard);
+ snd_mixer_selem_register(handle, NULL, NULL);
+ snd_mixer_load(handle);
+ snd_mixer_selem_id_malloc(&vol_info);
+ snd_mixer_selem_id_malloc(&mute_info);
+ snd_mixer_selem_id_set_name(vol_info, channel);
+ snd_mixer_selem_id_set_name(mute_info, channel);
+ pcm_mixer = snd_mixer_find_selem(handle, vol_info);
+ mas_mixer = snd_mixer_find_selem(handle, mute_info);
+ snd_mixer_selem_get_playback_volume_range((snd_mixer_elem_t *)pcm_mixer,
+ &min, &max);
+ snd_mixer_selem_get_playback_volume((snd_mixer_elem_t *)pcm_mixer,
+ SND_MIXER_SCHN_MONO, &vol);
+ snd_mixer_selem_get_playback_switch(mas_mixer, SND_MIXER_SCHN_MONO,
+ &mute);
+ if (vol_info)
+ snd_mixer_selem_id_free(vol_info);
+ if (mute_info)
+ snd_mixer_selem_id_free(mute_info);
+ if (handle)
+ snd_mixer_close(handle);
+
+ /* return the string (mute) */
+ if (!mute)
+ return "mute";
+ else
+ return smprintf("%d%%", (vol * 100) / max);