Hi Galaha, On Oct 16, 2008, at 19:31, Galaha Shine wrote: > I just wonder if it is possible to change a2dp headset volume by D-bus > command? > > I notice there is a D-bus API SetSpeakerGain in bluez 3.36. I've try > it > with my sco headset and it works. But it doesn't work when I try it > with > a a2dp headset. Dbus returns an error that is unconnected. Then I > download bluez 4.13 which is the latest build. I notice that API > SetSpeakerGain becomes deprecated. Meanwhile I find control-api.txt > which seems haven't been implemented yet. > > Could anybody give me a hint how to control a2dp headset from host > side > by D-bus command? The simple answer is that you can't do that at the moment. BlueZ has never supported controller (CT) side features of the AVRCP profile. There has been some talk about adding friendly D-Bus methods for this into the org.bluez.Control interface but it seems we forgot to add place holders for it into the control-api.txt API doc when the other new AVRCP features (that David Stockwell has worked on) were added there. I guess we should look into implementing this once David's patches get integrated upstream, but until then you'll have to control your A2DP volume from the headphone side. Johan ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Bluez-devel mailing list Bluez-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/bluez-devel
