[RFC 00/24] audio: add GStreamer backend

[marcandre.lureau@redhat.com]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

Hi,

The following patch series provides a GStreamer-based audio backend, which could
ultimately allow QEMU to leverage the framework to support the various audio
subsystems and simplify the audio handling logic (timing, resampling, mixing
etc), as well as allow greater pipeline flexibility and customization.

The preliminary patches consist of additional cleanups started in QEMU 10.2, in
order to make the code more modular and use QOM.

Finally, the last patch introduces the "audio" rust crate that implements the
GStreamer backend. See the TODO list in the commit message for the remaining or
related work items.

Please review and test!

Based-on: https://gitlab.com/bonzini/qemu.git rust-cargo
Requires meson from https://github.com/bonzini/meson.git cargo-object-full

Marc-André Lureau (24):
  rust: patch thiserror to work with meson
  audio: remove obsolete/obscure functions
  audio/dbus: make "dbus" the default backend when using -display dbus
  qemu-options.hx: clarify default audio backend selection
  audio: introduce AudioDriver
  audio: simplify audio_init()
  audio: move object creation to audio_driver_init()
  audio: add QOM module-objects for each backend
  audio: remove set_dbus_server from audio_driver
  audio: lookup "audio-" object types, and realize them
  audio: switch to module-object, drop audio driver registration
  module: remove audio module support
  audio: keep a strong reference on the backend
  audio: make list type declaration private
  audio: make create_pdos() private
  replay: remove dependency on audio/
  audio: make all the backend-specific APIs take the be
  audio: make AudioBackend truely abstract
  audio: split AudioBackend
  audio: AUD_ -> audio_be_
  audio-be: add common pre-conditions
  audio-be: add some state trace
  audio: split AudioDriver code in audio-driver.c
  WIP: rust/audio: add GStreamer backend

 qapi/audio.json                               |   29 +
 ...dio_template.h => audio-driver_template.h} |   76 +-
 audio/audio_int.h                             |   50 +-
 include/qemu/audio-capture.h                  |   24 +-
 include/qemu/audio.h                          |  129 +-
 include/qemu/module.h                         |    3 +-
 include/system/replay.h                       |    8 +-
 replay/replay-internal.h                      |    2 +
 rust/audio/wrapper.h                          |   27 +
 audio/alsaaudio.c                             |   42 +-
 audio/audio-be.c                              |  276 ++
 audio/audio-driver.c                          | 1988 +++++++++++++++
 audio/audio.c                                 | 2248 ++---------------
 audio/dbusaudio.c                             |   57 +-
 audio/dsoundaudio.c                           |   37 +-
 audio/jackaudio.c                             |   37 +-
 audio/noaudio.c                               |   37 +-
 audio/ossaudio.c                              |   41 +-
 audio/paaudio.c                               |   37 +-
 audio/pwaudio.c                               |   37 +-
 audio/sdlaudio.c                              |   37 +-
 audio/sndioaudio.c                            |   37 +-
 audio/spiceaudio.c                            |   37 +-
 audio/wavaudio.c                              |   37 +-
 audio/wavcapture.c                            |    7 +-
 hw/audio/ac97.c                               |   42 +-
 hw/audio/adlib.c                              |   29 +-
 hw/audio/asc.c                                |   20 +-
 hw/audio/cs4231a.c                            |   18 +-
 hw/audio/es1370.c                             |   26 +-
 hw/audio/gus.c                                |   11 +-
 hw/audio/hda-codec.c                          |   26 +-
 hw/audio/lm4549.c                             |   20 +-
 hw/audio/pcspk.c                              |    8 +-
 hw/audio/sb16.c                               |   22 +-
 hw/audio/via-ac97.c                           |   20 +-
 hw/audio/virtio-snd.c                         |   36 +-
 hw/audio/wm8750.c                             |   42 +-
 hw/display/xlnx_dp.c                          |   14 +-
 hw/usb/dev-audio.c                            |   18 +-
 replay/replay-audio.c                         |   51 +-
 replay/replay.c                               |    2 +-
 replay/stubs-system.c                         |    8 +-
 ui/dbus.c                                     |   16 +-
 ui/vnc.c                                      |    4 +-
 Cargo.lock                                    |  572 ++++-
 Cargo.toml                                    |    6 +
 audio/coreaudio.m                             |   37 +-
 audio/meson.build                             |    2 +
 audio/trace-events                            |    9 +
 qemu-options.hx                               |   20 +-
 rust/audio/Cargo.toml                         |   29 +
 rust/audio/build.rs                           |   49 +
 rust/audio/meson.build                        |   75 +
 rust/audio/src/audio.rs                       |  516 ++++
 rust/audio/src/bindings.rs                    |   32 +
 rust/audio/src/gstreamer.rs                   | 1070 ++++++++
 rust/audio/src/lib.rs                         |   99 +
 rust/meson.build                              |    6 +
 .../packagefiles/syn-2-rs/meson/meson.build   |    3 +
 .../thiserror-2.0.17-include.patch            |   14 +
 .../thiserror-impl-2.0.17-include.patch       |   13 +
 subprojects/syn-2-rs.wrap                     |   11 +-
 subprojects/thiserror-2-rs.wrap               |   10 +
 subprojects/thiserror-impl-2-rs.wrap          |   10 +
 65 files changed, 5862 insertions(+), 2494 deletions(-)
 rename audio/{audio_template.h => audio-driver_template.h} (90%)
 create mode 100644 rust/audio/wrapper.h
 create mode 100644 audio/audio-be.c
 create mode 100644 audio/audio-driver.c
 create mode 100644 rust/audio/Cargo.toml
 create mode 100644 rust/audio/build.rs
 create mode 100644 rust/audio/meson.build
 create mode 100644 rust/audio/src/audio.rs
 create mode 100644 rust/audio/src/bindings.rs
 create mode 100644 rust/audio/src/gstreamer.rs
 create mode 100644 rust/audio/src/lib.rs
 create mode 100644 subprojects/packagefiles/syn-2-rs/meson/meson.build
 create mode 100644 subprojects/packagefiles/thiserror-2.0.17-include.patch
 create mode 100644 subprojects/packagefiles/thiserror-impl-2.0.17-include.patch
 create mode 100644 subprojects/thiserror-2-rs.wrap
 create mode 100644 subprojects/thiserror-impl-2-rs.wrap

-- 
2.51.1