If the guest incorrectly programs the lm4549 audio chip with a zero
frequency, we will pass this to AUD_open_out(), which will complain:
A bug was just triggered in AUD_open_out
Save all your work and restart without audio
I am sorry
Context:
audio: frequency=0 nchannels=2 fmt=S16 endianness=little
The datasheet doesn't say what we should do here, only that the valid
range for the freqency is 4000 to 48000 Hz; we choose to log the
guest error and ignore an attempt to change the DAC rate to something
outside the valid range.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/410
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20251107154116.1396769-1-peter.maydell@linaro.org
Remove unnecessary PCI configuration register initialization that was
marked with TODO comments indicating it's redundant:
- PCI_COMMAND register is already 0x00 by default, no need to override
- PCI_BASE_ADDRESS_0 registers are automatically set by pci_register_bar()
This aligns the code with the pattern used by other PCI audio devices
in QEMU (via-ac97, intel-hda, es1370) and removes 15 lines of dead code.
Signed-off-by: Osama Abdelkader <osama.abdelkader@gmail.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-ID: <20251102231903.65409-1-osama.abdelkader@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
There is no clear need for this extra intermediary structure between
the audio backend and its user.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Naming is hard. But in general in QEMU, a host "backend" is the term
used to fullfill the request made by the device or frontend.
AudioBackend will become an abstract base class in a follow-up series.
Currently the frontend is QEMUSoundCard, we are going to drop that next.
Note that "audiodev" is the corresponding QAPI type name (or configuration).
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
There are 2 sets of functions since the introduction of multi-channel
Volume structure: AUD_set_volume_{in,out} and audio_set_volume_{in,out}.
Use the AUD_ prefix for consistency with other audio.c functions. Rename
the stereo function with "_lr" suffix.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
For consistency, use only qdev_device_add() to instantiate the devices.
We can't rely on automatic bus lookup for the "hda-duplex" device though
as it may end up on a different "intel-hda" bus...
This allows to make init() callback bus-agnostic next.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
virtio-snd can rely on the default code to instantiate the device and
set the audiodev.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
All the functions are about "-audio model=" handling, a simpler
way to setup audio. Rename functions/variables to reflect this better.
audio_register_model_with_cb() dropped "pci" from the name, since it
will be generalized next.
deprecated_register_soundhw() was actually not a function to be
removed since it's used for "-audio model=" aliasing.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
AUD_log() is just printf(stderr, "prefix: "..), we can use
error_report() or warn_report() appropriately instead.
Ideally it should be converted to traces, but there are many places to
convert, this is left for another day.
Avoid bit-rot by using conditionals.
The patch could be splitted if necessary.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20251021090317.425409-32-marcandre.lureau@redhat.com>
[PMD: Fixed checkpatch.pl issues]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
The 'out_cb' method has a 4k byte array used for copying data
between the audio backend and device. Skip the automatic zero-init
of this array to eliminate the performance overhead in the I/O hot
path.
The 'tmpbuf' array will be fully initialized when reading data from
device memory.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20250610123709.835102-14-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
