HelenOS sources

audio_data_link_available_frames  221 uspace/srv/audio/hound/audio_data.c 	pipe->frames += audio_data_link_available_frames(alink);
audio_data_link_available_frames  241 uspace/srv/audio/hound/audio_data.c 		pipe->frames -= audio_data_link_available_frames(alink);
audio_data_link_available_frames  277 uspace/srv/audio/hound/audio_data.c 		    audio_data_link_available_frames(alink);
HelenOS homepage, sources at GitHub