Hi, > You can use libpulse to query the bluetooth card status (and you could > use libpulse to also record and play audio - using parec and pacat > sounds quite hacky if you're writing a serious application). > pa_context_get_card_info_list() can be used to get the information > about all cards. If you see the headset in the list, then it's > connected. Thank you for your advice. I would like to use libpulse, but I couldnâ??t make it properly. So I use parec/pacat command. I'll get information from â??pactl list cardsâ??. Best Regards, Shinnosuke Suzuki > On Apr 8, 2018, at 18:38, Tanu Kaskinen <tanuk at iki.fi> wrote: > > On Tue, 2018-04-03 at 19:18 +0900, Shinnosuke Suzuki wrote: >> Hi, >> >> I am developing simple telephony app using pulseauio 11.1. >> I would like to get status for bluetooth headset connection and >> disconnection. >> Is there any way to get status for connection and disconnection for >> bluetooth headset? >> I write a telephony app in C with parec and pacat command to handle >> bluetooth headset. >> So I would like to judge whether app can connect call with bluetooth >> headset. > > You can use libpulse to query the bluetooth card status (and you could > use libpulse to also record and play audio - using parec and pacat > sounds quite hacky if you're writing a serious application). > pa_context_get_card_info_list() can be used to get the information > about all cards. If you see the headset in the list, then it's > connected. > > The documentation for libpulse is here: > https://freedesktop.org/software/pulseaudio/doxygen/index.html > > The card might not have the right profile active, but pulseaudio should > automatically switch to the HSP profile if you create a recording > stream with the media.role property set to "phone". In case of parec > that can be done by passing command line argument > --property=media.role=phone . You can also manually switch the profile > with pa_context_set_card_profile_by_name(). > > You can get notifications when things change (e.g. a new card appears) > with the subscription API of libpulse. > > -- > Tanu > > https://liberapay.com/tanuk > https://www.patreon.com/tanuk
