On Wed, 2021-01-13 at 15:49 +0100, Takashi Iwai wrote:
On Wed, 13 Jan 2021 15:36:19 +0100, Bastien Nocera wrote:
Hey,
On Wed, 2020-12-09 at 14:30 +0100, Bastien Nocera wrote:
Hey,
I've recently bought a SteelSeries Arctis 1 wireless headset: https://steelseries.com/gaming-headsets/arctis-1-wireless-xbox and wanted to write a kernel driver to export a few features of the device, and needed some help getting started.
The receiver shows up as a audio class USB device, with extra features on a separate USB interface.[1]
The extra features that can be accessed are:
- Presence detection. I wanted to use that so PulseAudio or
Pipewire could make routing decisions based on whether the headset is available, or probably better, implementing a "jack detection" emulation for the main audio interface?
- A slider to change the sidetone volume
- Export the battery level
The latter is the only one I know how to do, so I'd be happy with any pointers or examples about the first two items.
I sent this in December and didn't get any answers, and I would appreciate any guidance/examples if you have any into implementing this.
Judging from the link, is it controlled through HID? If so, it's primarily done by a HID driver, and it doesn't belong to the sound card stuff, so far. Though....
I would imagine that the new features would be implemented through a separate ALSA device with few features, which PulseAudio/Pipewire could merge with the existing USB audio device.
... given that it's implemented in a HID driver, the integration to the system is a different question. But unless it's implemented as a sound card device, the rest will become a totally different, e.g. another PA or PW module.
I think that it might be good to have the sidetone configuration implemented as a channel mixer, so it could be shown along with the device volume in sound settings.
I believe there's already a device group feature in PulseAudio that could be used to merge the sidetone level with the rest of the USB audio mixers.
Is there an example of a mixer like that implemented in a hid or another type of non-ALSA/sound driver?