On Thu, 2014-02-13 at 10:35 +0800, Raymond Yau wrote: > 2014-02-11 22:03 GMT+08:00 Tanu Kaskinen <tanu.kaskinen at linux.intel.com>: > > > Hi all! > > > > I'm working (together with other people at Intel) on adding system volume > > control functionality to Tizen (primarily the IVI profile, although there's > > nothing inherently IVI specific here). Tizen uses web APIs for the UI, and > > since there are no existing web API standards for this functionality, we > > need to design the API from scratch. The current design can be seen at [1], > > in case you're interested (it's good background material for this > > discussion). What I'd like to discuss in this thread, however, is not the > > web API as such, but the use cases behind that design and what those use > > cases ultimately require from PulseAudio. (Feedback for the web API > > proposal is welcome too, but I think that should be discussed in a separate > > thread.) > > > > We want to support: > > * A single main output volume control. Think of things like the Gnome > > volume applet: when you click the applet icon, you get a single volume > > slider for controlling the "current output", whatever that means. The Gnome > > volume applet implements the main volume by using the default sink volume, > > but we'd like to make the main volume contextual, so that the main volume > > can control different things at different times. Ideally the contextual > > logic would be implemented in PulseAudio (by a policy module), not in the > > volume applet. The volume applet should know when the main volume controls > > e.g. the headphones volume or the phone call volume. > > > > will it have a mute switch which is independent of the volume similar to > those volume controls of HDA codec ? > > for mobile phone and tablet which only have volume up and volume down, the > mute is at the minimum of the volume > > but the mute switch exist for a remote control of TV or settop box or > notebook , the volume is unaffected when mute and unmute You're right, there should be a "main mute" control. I have a mute button on my laptop, so I really should have seen this use case... > There are some codecs which does not have a mute switch independent of the > volume control and use TLV_DB_SCALE_MUTE This is not really relevant, because PulseAudio can synthesize a software mute control just fine if there's no hardware mute control. -- Tanu
