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audio: remove QEMU_AUDIO_* and -audio-help support

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These have been deprecated for a long time, and the introduction of
-audio in 7.1.0 has cemented the new way of specifying an audio backend's
parameters.  However, there is still a need for simple configuration
of the audio backend in the desktop case; therefore, if no audiodev is
passed to audio_init(), go through a bunch of simple Audiodev* structures
and pick the first that can be initialized successfully.

The only QEMU_AUDIO_* option that is left in, waiting for a better idea,
is QEMU_AUDIO_DRV=none which is used by qtest.

Remove all the parsing code, including the concept of "can_be_default"
audio drivers: now that audio_prio_list[] is only used in a single place,
wav can be excluded directly in that function.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-09-05 11:41:05 +02:00
parent e329963172
commit 69a802792a
21 changed files with 65 additions and 711 deletions
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8
docs/about/deprecated.rst
View file

@ -37,14 +37,6 @@ coverage.
System emulator command line arguments
--------------------------------------
``QEMU_AUDIO_`` environment variables and ``-audio-help`` (since 4.0)
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
The ``-audiodev`` argument is now the preferred way to specify audio
backend settings instead of environment variables. To ease migration to
the new format, the ``-audiodev-help`` option can be used to convert
the current values of the environment variables to ``-audiodev`` options.
Creating sound card devices without ``audiodev=`` property (since 4.2)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''

6
docs/about/removed-features.rst
View file

@ -436,6 +436,12 @@ the process listing. This was replaced by the new ``password-secret``
option which lets the password be securely provided on the command
line using a ``secret`` object instance.
``QEMU_AUDIO_`` environment variables and ``-audio-help`` (removed in 8.2)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
The ``-audiodev`` and ``-audio`` command line options are now the only
way to specify audio backend settings.
Creating vnc without ``audiodev=`` property (removed in 8.2)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''