CVSROOT: /cvs
Module name: src
Changes by: jake...@cvs.openbsd.org 2010/09/11 20:01:17
Modified files:
sys/dev : audio.c audiovar.h
Log message:
DVACT_{QUIESCE,RESUME} for audio(4)
DVACT_QUIESCE:
1) waits until ringbuffer current position wraps back to the start of
the buffer
2) stops playback and/or recording by way of the hardware drivers' "halt"
audio_hw_if method
3) blocks userland access to audio device
4) saves the current state of the master mute, then mutes it
DVACT_RESUME:
1) reprogram hardware stream parameters for playback or recording
if they were active at DVACT_QUIESCE by way of hardware drivers'
"set_params" audio_hw_if method
2) start playback or recording if they were active at DVACT_QUIESCE
by way of hardware drivers' "trigger" or "start" audio_hw_if method
3) restores master mute state as it was at DVACT_QUIESCE
4) wakes up blocked userland processes accessing the hardware
