Commit Graph

16 Commits

Author SHA1 Message Date
augustss 332ad95e76 Change the MI audio driver so it attaches to the MD driver in the
normal way.  This requires adding a line to the config files to
get audio to work again.
1997-08-19 23:49:33 +00:00
augustss 8f096d087f Implement delivery of SIGIO on changes to /dev/mixer. 1997-08-11 01:38:12 +00:00
augustss 9a770a177f Make setting the audio block size sticky.
Change the calculated block size to correspond to 50 ms of sound
(was 20 ms, it seems needlessly small).
1997-08-08 00:03:26 +00:00
augustss 658656bb99 Audio changes:
- Change the way attach and open works to allow multiple audio
	  devices.
	- Split the mulaw.c file into two to avoid dragging in mulaw
	  convertsion when they are not needed.  Add 16 bit alaw/mulaw tables.
	- Change the way audio properties are gotten.
	- Recognize more versions os SoundBlaster.
1997-07-31 22:33:08 +00:00
augustss 63decd9438 Fix divide by 0 bug in audio driver. 1997-07-27 23:06:04 +00:00
augustss 9745684ebe Changes to the sudio system:
- It is now possible to handle devices that want "looping" DMA,
    e.g. the SoundBlaster correctly.  The WSS and SB drivers use this.
    To do this several new methods were introduced in audio_hw_if.
  - Different silence handling (forced by previous change).
  - The audio driver can now be mmap()-ed, but due to problems in
    the VM system only for writing for now.
  - The OSS (Linux) audio emulation takes advantage of some of the
    new features.
1997-07-27 01:16:32 +00:00
augustss 526ef2f618 Change the interface between the high and low level audio drivers
so that all audio encoding parameters are set at once.  This simplifies
the interface and make error checking easier.
1997-04-29 21:01:33 +00:00
mycroft 8b4878a6ba Fill in silence-padded blocks so we don't get gaps. From PR 3357,
by Lennart Augustsson.
1997-03-20 03:19:53 +00:00
mycroft ac3b8b13b7 Don't share the silence block between devices. Make silence filling work for
more encodings, and make it device-independent.  From Lennart Augustsson, in
PR kern/3305.
1997-03-13 02:19:32 +00:00
mycroft 5f732f379e Trivial (and probably not very good) implementation of SIGIO. 1996-02-20 10:00:31 +00:00
jtk 4f3fc10939 Fix PR#2060 (add AUDIO_PERROR ioctl to query # of playback drops), also
fix semantics of AUDIO_WERROR (now returns a count).

Also repair audio driver back to "real-time mode" where user must
provide data quickly enough for real time audio or silence is played
until user catches up.  Add optional "play all" mode (additional bit in
mode field) to play all samples provided, with silence when needed to
avoid buffer underrun.
1996-02-17 02:28:56 +00:00
mycroft 8ba7909bb4 Eliminate sc_silence, and handle output interrupts somewhat differently.
From John Kohl, slightly edited.
1996-02-16 02:25:43 +00:00
scottr 186d69c204 Don't adjust the number of blocks in the ring buffer if the driver
is currently outputting silence.  Fix from Lennart Augustsson
<augustss@cs.chalmers.se>, closes PR #2010.
1996-02-05 21:11:10 +00:00
brezak c68110e043 Remove strings 1995-05-08 22:01:34 +00:00
mycroft ff6c206c3f Use void* rather than caddr_t in many places. 1995-03-25 00:00:53 +00:00
brezak 1f5bdc75a9 New audio subsystem 1995-02-21 01:35:58 +00:00