HelenOS sources
audio_pcm_query_cap 354 uspace/app/wavplay/dplay.c ret = audio_pcm_query_cap(session, AUDIO_CAP_PLAYBACK, &val);
audio_pcm_query_cap 396 uspace/app/wavplay/dplay.c ret = audio_pcm_query_cap(pb.device, AUDIO_CAP_BUFFER_POS, &val);
audio_pcm_query_cap 400 uspace/app/wavplay/dplay.c ret = audio_pcm_query_cap(pb.device, AUDIO_CAP_INTERRUPT, &val);
audio_pcm_query_cap 193 uspace/app/wavplay/drec.c ret = audio_pcm_query_cap(session, AUDIO_CAP_CAPTURE, &val);
audio_pcm_query_cap 233 uspace/app/wavplay/drec.c ret = audio_pcm_query_cap(rec.device, AUDIO_CAP_INTERRUPT, &val);
audio_pcm_query_cap 85 uspace/lib/drv/include/audio_pcm_iface.h errno_t audio_pcm_query_cap(audio_pcm_sess_t *, audio_cap_t, sysarg_t *);
audio_pcm_query_cap 124 uspace/srv/audio/hound/audio_device.c errno_t rc = audio_pcm_query_cap(dev->sess, AUDIO_CAP_CAPTURE, &val);
audio_pcm_query_cap 140 uspace/srv/audio/hound/audio_device.c errno_t rc = audio_pcm_query_cap(dev->sess, AUDIO_CAP_PLAYBACK, &val);
HelenOS homepage, sources at GitHub