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  • Anton Anton anjo
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  1. Jan 15, 2021
  3. Feb 06, 2020
  5. Jan 31, 2020
    • Volker Rümelin's avatar
      audio: fix bug 1858488 · fdc8c5f4
      Volker Rümelin authored 
      The combined generic buffer management code and buffer run out
code in function audio_generic_put_buffer_out has a problematic
behaviour. A few hundred milliseconds after playback starts the
mixing buffer and the generic buffer are nearly full and the
following pattern can be seen.

On first call of audio_pcm_hw_run_out the buffer run code in
audio_generic_put_buffer_out writes some data to the audio
hardware but the generic buffer will fill faster and is full
when audio_pcm_hw_run_out returns. This is because emulated
audio devices can produce playback data at a higher rate than
the audio backend hardware consumes this data.

On next call of audio_pcm_hw_run_out the buffer run code in
audio_generic_put_buffer_out writes some data to the audio
hardware but no audio data is transferred to the generic buffer
because the buffer is already full.

Then the pattern repeats. For the emulated audio device this
looks like the audio timer period has doubled.

This patch splits the combined generic buffer management code
and buffer run out code and calls the buffer run out code after
buffer management code to break this pattern.

The bug report is for the wav audio backend. But the problem is
not limited to this backend. All audio backends which use the
audio_generic_put_buffer_out function show this problem.

Buglink: https://bugs.launchpad.net/qemu/+bug/1858488


Signed-off-by: default avatarVolker Rümelin <vr_qemu@t-online.de>
Message-Id: <20200123074943.6699-5-vr_qemu@t-online.de>
Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
      fdc8c5f4
  7. Oct 18, 2019
  9. Sep 23, 2019
  11. Aug 21, 2019
  13. Mar 11, 2019
  15. Jan 22, 2019
  17. Mar 12, 2018
  19. Mar 05, 2018
  21. Feb 06, 2018
  23. Jul 12, 2016
  25. Jun 15, 2015
  27. Jun 21, 2013
  29. Apr 17, 2012
  31. Jan 12, 2011
  33. Nov 09, 2010
    • Gerd Hoffmann's avatar
      spice: add audio · 3e313753
      Gerd Hoffmann authored 
      
Add support for the spice audio interface.  With this patch applied
audio can be forwarded over the network from/to the spice client.  Both
recording and playback is supported.

The driver is first in the driver list, but the can_be_default flag is
set only in case spice is active.  So if you have the spice protocol
enabled the spice audio driver is the default one, otherwise whatever
comes first after spice in the list.  Overriding the default using
QEMU_AUDIO_DRV works in any case.

[ v2: audio codestyle: add spaces before open parenthesis ]
[ v2: add const to silence array ]

Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Cc: malc <av1474@comtv.ru>
Signed-off-by: default avatarmalc <av1474@comtv.ru>
      3e313753
  35. Sep 22, 2010
  37. Oct 14, 2009
  39. Oct 09, 2009
  41. Sep 18, 2009
  43. Sep 12, 2009
    • Blue Swirl's avatar
      Fix sys-queue.h conflict for good · 72cf2d4f
      Blue Swirl authored 
      
Problem: Our file sys-queue.h is a copy of the BSD file, but there are
some additions and it's not entirely compatible. Because of that, there have
been conflicts with system headers on BSD systems. Some hacks have been
introduced in the commits 15cc9235,
f40d7537,
96555a96 and
3990d09a but the fixes were fragile.

Solution: Avoid the conflict entirely by renaming the functions and the
file. Revert the previous hacks.

Signed-off-by: default avatarBlue Swirl <blauwirbel@gmail.com>
      72cf2d4f
  45. Sep 11, 2009
  47. Aug 11, 2009
  49. May 13, 2009