[PATCH 0/7] audio: redo default audio backend creation

[Paolo Bonzini]

Currently, AUD_register_card picks the audio backend from either:

- the first audiodev that was created

- the audio_prio_list[] array, which can be customized at
  configure time

This series instead extends -audio to define a default audio
backend if no "model" is used.  This preserves simple command line
use where a single "-audio" option applies to all audio devices
and captures, and also uses a single QAPI-based configuration
syntax for both -audio and -audiodev.

The current hack to use the first -audiodev as a default audio
device is removed.  For migration purposes, the first audiodev
is suggested in case of an error:

  ./qemu-system-x86_64 -device sb16 -audiodev pa,id=default
  qemu-system-x86_64: -device sb16: no default audio driver available
  Perhaps you wanted to set audiodev=default?

VNC is changed to reintroduce use of the default audio backend;
still, compared to before the cleanup effort this will not be
enabled if -nodefaults is use, which is an improvement as it
removes magic.

Paolo


Paolo Bonzini (7):
  audio: error hints need a trailing \n
  audio: disable default backends if -audio/-audiodev is used
  audio: extract audio_define_default
  audio: extend -audio to allow creating a default backend
  audio: do not use first -audiodev as default audio device
  audio: reintroduce default audio backend for VNC
  audio, qtest: get rid of QEMU_AUDIO_DRV

 audio/audio.c                   | 85 +++++++++++++--------------------
 audio/audio.h                   |  3 ++
 docs/about/deprecated.rst       |  6 ---
 docs/about/removed-features.rst | 14 ++++--
 qemu-options.hx                 | 29 +++++++----
 system/vl.c                     | 34 ++++++++-----
 tests/qtest/libqtest.c          |  4 +-
 ui/vnc.c                        |  2 +
 8 files changed, 93 insertions(+), 84 deletions(-)

-- 
2.41.0