1 #ifndef VOLUME_MAPPING_H_INCLUDED 2 #define VOLUME_MAPPING_H_INCLUDED 3 4 #include <alsa/asoundlib.h> 5 6 double get_normalized_playback_volume(snd_mixer_elem_t *elem, 7 snd_mixer_selem_channel_id_t channel); 8 double get_normalized_capture_volume(snd_mixer_elem_t *elem, 9 snd_mixer_selem_channel_id_t channel); 10 int set_normalized_playback_volume(snd_mixer_elem_t *elem, 11 snd_mixer_selem_channel_id_t channel, 12 double volume, 13 int dir); 14 int set_normalized_capture_volume(snd_mixer_elem_t *elem, 15 snd_mixer_selem_channel_id_t channel, 16 double volume, 17 int dir); 18 19 #endif 20