48     self->mixer_elem = NULL;  in ALSAAudio_init()
147     self->mixer_elem = find_playback_mixer_element(self->mixer, "Master");  in ALSAAudio_init()
148     if (self->mixer_elem == NULL) {  in ALSAAudio_init()
150         self->mixer_elem = find_playback_mixer_element(self->mixer, "PCM");  in ALSAAudio_init()
152     if (self->mixer_elem != NULL) {  in ALSAAudio_init()
153         snd_mixer_selem_get_playback_volume_range(self->mixer_elem,  in ALSAAudio_init()
164     snd_mixer_elem_t *mixer_elem;  in find_playback_mixer_element()  local
166     for (mixer_elem = snd_mixer_first_elem(mixer);  in find_playback_mixer_element()
167          mixer_elem != NULL;  in find_playback_mixer_element()
168          mixer_elem = snd_mixer_elem_next(mixer_elem)) {  in find_playback_mixer_element()
169         const char *elem_name = snd_mixer_selem_get_name(mixer_elem);  in find_playback_mixer_element()
171             snd_mixer_selem_has_playback_volume(mixer_elem) &&  in find_playback_mixer_element()
173             return mixer_elem;  in find_playback_mixer_element()
413     if (self->mixer_elem != NULL) {  in ALSAAudio_get_volume()
433             if (snd_mixer_selem_has_playback_channel(self->mixer_elem,  in ALSAAudio_get_volume()
435                 (snd_mixer_selem_get_playback_volume(self->mixer_elem,  in ALSAAudio_get_volume()
466     snd_mixer_selem_set_playback_volume_all(self->mixer_elem, new_volume);  in ALSAAudio_set_volume()