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* [Qemu-devel] [PATCH 00/11] RFC: apply volume on client stream
@ 2011-09-21 16:10 Marc-André Lureau
  2011-09-21 16:10 ` [Qemu-devel] [PATCH 01/11] audio: add VOICE_VOLUME ctl Marc-André Lureau
                   ` (24 more replies)
  0 siblings, 25 replies; 40+ messages in thread
From: Marc-André Lureau @ 2011-09-21 16:10 UTC (permalink / raw)
  To: qemu-devel; +Cc: Marc-André Lureau

Hi,

The qemu volume control experience could be improved. Without mixemu,
the volume control has no effect. A volume applet will just feel
broken (except in some cases where software volume is applied on guest
side, with HDA/Windows7 for example). 

And a few other problems:

 - the guest should have a full-range hw volume control over actual
   audio device.
   See https://bugzilla.redhat.com/show_bug.cgi?id=482089

 - one volume should rule them all (no need to control guest,
   stream and client volumes separately)

 - the client volume should be set to match the guest on connection,
   ex: volume and mute should be restored

 - backend should hopefully be better at applying volume effect
   (PulseAudio rely on HW as much as possible, and then optimized
   routines)

  - ideally, we would sync both ways guest <-> client, that would
    probably require guest agent helper to be notified on update

The flat-volume logic of PulseAudio (and Windows) ensures a stream get
a full-range volume control. Thus, the "guest volume" can rely on its
"client stream volume" to have control over the full volume range.

I propose an audio backend claiming VOICE_VOLUME_CAP should handle
VOICE_VOLUME messages and apply the volume/mute received. In this
case mixeng_clear / mixeng_volume aren't applied.

I modified the PA backend as a proof of concept (I had to drop the
pa_simple API, as I can't see how to modify a stream volume
otherwise).

Spice and spice-gtk client have already been supporting volume control
for a while, but qemu part is the missing bit.

Marc-André Lureau (11):
  audio: add VOICE_VOLUME ctl
  audio: don't apply volume effect if backend has VOICE_VOLUME_CAP
  audio: use a nominal volume of 1^32-1
  hw/ac97: remove USE_MIXER code
  hw/ac97: the volume mask was not always 0x1f
  hw/ac97: new support for volume control
  audio/spice: add support for volume control
  RFC: use full PulseAudio API, largely adapted from pa_simple*
  RFC: configure: pa_simple is not needed anymore
  RFC: allow controlling volume with PulseAudio backend
  RFC: make mixemu mandatory

 audio/audio.c          |   25 +++-
 audio/audio_int.h      |    6 +
 audio/audio_template.h |    2 +
 audio/mixeng.c         |    6 -
 audio/paaudio.c        |  452 +++++++++++++++++++++++++++++++++++++++++++-----
 audio/spiceaudio.c     |   43 +++++
 configure              |   14 +--
 hw/ac97.c              |  141 ++++++----------
 hw/hda-audio.c         |    4 -
 9 files changed, 533 insertions(+), 160 deletions(-)

-- 
1.7.6.2

^ permalink raw reply	[flat|nested] 40+ messages in thread
* Re: [Qemu-devel] [PATCH 06/11] hw/ac97: new support for volume control
@ 2011-09-29  7:54 Wayne Gao
  0 siblings, 0 replies; 40+ messages in thread
From: Wayne Gao @ 2011-09-29  7:54 UTC (permalink / raw)
  To: Marc-André Lureau; +Cc: qemu-devel

Hi Marc-André,


>>>
        ---
         hw/ac97.c |   79
        +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
         1 files changed, 79 insertions(+), 0 deletions(-)
        
        diff --git a/hw/ac97.c b/hw/ac97.c
        index ba94835..4a7c4ed 100644
        --- a/hw/ac97.c
        +++ b/hw/ac97.c
        @@ -431,6 +431,63 @@ static void reset_voices (AC97LinkState *s,
        uint8_t 
        ;
        
        ...
        
        -- 
        1.7.6.2
>>>

According to my test, my guest OS also can support for volume control
even I don't apply the patch to my code. I run my Ubuntu guest OS via
the following command:

qemu-system-x86_64 -M pc --enable-kvm -m 512 -smp 1 -name Ubuntu
-localtime -boot c -drive file=ubuntu.img,if=virtio,index=0  -vga cirrus
-chardev stdio,id=mon0 -mon chardev=mon0,mode=readline -chardev
socket,id=mon1,host=localhost,port=5554,server,nowait,telnet -mon
chardev=mon1,mode=control -soundhw ac97


By the way, my host OS is also Ubuntu 11.04 and I haven't apply your
patch [PATCH 04/11] and [PATCH 05/11] for hw/ac97.c to my code. Are
there any problems for my test?


Best Regards
Wayne Gao

 

^ permalink raw reply	[flat|nested] 40+ messages in thread

end of thread, other threads:[~2012-03-01 15:16 UTC | newest]

Thread overview: 40+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-09-21 16:10 [Qemu-devel] [PATCH 00/11] RFC: apply volume on client stream Marc-André Lureau
2011-09-21 16:10 ` [Qemu-devel] [PATCH 01/11] audio: add VOICE_VOLUME ctl Marc-André Lureau
2011-09-21 16:10 ` [Qemu-devel] [PATCH 02/11] audio: don't apply volume effect if backend has VOICE_VOLUME_CAP Marc-André Lureau
2011-09-21 16:11 ` [Qemu-devel] [PATCH 03/11] audio: use a nominal volume of 1^32-1 Marc-André Lureau
2011-09-21 16:11 ` [Qemu-devel] [PATCH 04/11] hw/ac97: remove USE_MIXER code Marc-André Lureau
2011-09-21 16:11 ` [Qemu-devel] [PATCH 05/11] hw/ac97: the volume mask was not always 0x1f Marc-André Lureau
2011-09-21 16:11 ` [Qemu-devel] [PATCH 06/11] hw/ac97: new support for volume control Marc-André Lureau
2011-09-21 16:11 ` [Qemu-devel] [PATCH 07/11] audio/spice: add " Marc-André Lureau
2011-10-11  8:49   ` Gerd Hoffmann
2011-10-13 12:06     ` Marc-André Lureau
2011-09-21 16:11 ` [Qemu-devel] [PATCH 08/11] RFC: use full PulseAudio API, largely adapted from pa_simple* Marc-André Lureau
2011-09-21 16:11 ` [Qemu-devel] [PATCH 09/11] RFC: configure: pa_simple is not needed anymore Marc-André Lureau
2011-09-21 16:11 ` [Qemu-devel] [PATCH 10/11] RFC: allow controlling volume with PulseAudio backend Marc-André Lureau
2011-09-21 16:11 ` [Qemu-devel] [PATCH 11/11] RFC: make mixemu mandatory Marc-André Lureau
2011-10-11  8:54 ` [Qemu-devel] [PATCH 00/11] RFC: apply volume on client stream Gerd Hoffmann
2011-10-13 12:26 ` [Qemu-devel] [PATCH 01/11] audio: add VOICE_VOLUME ctl Marc-André Lureau
2011-10-13 12:26   ` [Qemu-devel] [PATCH 02/11] audio: don't apply volume effect if backend has VOICE_VOLUME_CAP Marc-André Lureau
2011-10-13 12:26   ` [Qemu-devel] [PATCH 03/11] audio: use a nominal volume of 1^32-1 Marc-André Lureau
2011-10-13 12:26   ` [Qemu-devel] [PATCH 04/11] hw/ac97: remove USE_MIXER code Marc-André Lureau
2011-10-13 12:26   ` [Qemu-devel] [PATCH 05/11] hw/ac97: the volume mask was not always 0x1f Marc-André Lureau
2011-10-13 12:26   ` [Qemu-devel] [PATCH 06/11] hw/ac97: new support for volume control Marc-André Lureau
2011-10-13 12:26   ` [Qemu-devel] [PATCH 07/11] audio/spice: add " Marc-André Lureau
2011-10-13 12:26   ` [Qemu-devel] [PATCH 08/11] audio: use full PulseAudio API, largely adapted from pa_simple* Marc-André Lureau
2011-10-13 12:26   ` [Qemu-devel] [PATCH 09/11] configure: pa_simple is not needed anymore Marc-André Lureau
2011-10-13 12:26   ` [Qemu-devel] [PATCH 10/11] audio: allow controlling volume with PulseAudio backend Marc-André Lureau
2011-10-13 12:26   ` [Qemu-devel] [PATCH 11/11] audio: make mixemu mandatory Marc-André Lureau
2012-03-01 14:27 ` [Qemu-devel] [PATCH 00/11] apply volume on client side Marc-André Lureau
2012-03-01 14:27 ` [Qemu-devel] [PATCH 01/11] audio: add VOICE_VOLUME ctl Marc-André Lureau
2012-03-01 14:27 ` [Qemu-devel] [PATCH 02/11] audio: don't apply volume effect if backend has VOICE_VOLUME_CAP Marc-André Lureau
2012-03-01 14:27 ` [Qemu-devel] [PATCH 03/11] audio: use a nominal volume of 1^32-1 Marc-André Lureau
2012-03-01 15:16   ` Eric Blake
2012-03-01 14:28 ` [Qemu-devel] [PATCH 04/11] hw/ac97: remove USE_MIXER code Marc-André Lureau
2012-03-01 14:28 ` [Qemu-devel] [PATCH 05/11] hw/ac97: the volume mask was not always 0x1f Marc-André Lureau
2012-03-01 14:28 ` [Qemu-devel] [PATCH 06/11] hw/ac97: new support for volume control Marc-André Lureau
2012-03-01 14:28 ` [Qemu-devel] [PATCH 07/11] audio/spice: add " Marc-André Lureau
2012-03-01 14:28 ` [Qemu-devel] [PATCH 08/11] Do not use pa_simple PulseAudio API Marc-André Lureau
2012-03-01 14:28 ` [Qemu-devel] [PATCH 09/11] configure: pa_simple is not needed anymore Marc-André Lureau
2012-03-01 14:28 ` [Qemu-devel] [PATCH 10/11] Allow controlling volume with PulseAudio backend Marc-André Lureau
2012-03-01 14:28 ` [Qemu-devel] [PATCH 11/11] Make mixemu mandatory Marc-André Lureau
  -- strict thread matches above, loose matches on Subject: below --
2011-09-29  7:54 [Qemu-devel] [PATCH 06/11] hw/ac97: new support for volume control Wayne Gao

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