[pulseaudio-discuss] bluetooth headset connection and disconnection status

[Shinnosuke Suzuki]

Hi,

> It's true that when the server processes the "list cards" command from
> pactl, packets to/from parec/pacat are not processed during time, but
> sending the card information shouldn't take a long time, so it sounds
> strange that you'd observe audio drop-outs. Does your application
> perhaps itself stop processing the audio to/from pacat/parec while it's
> running pactl?


The problem which I have is audio stops only while pactl is running.
Audio is gradually lagging behind.I mean audio don't drop-out.

Audio stream seems to be delayed every time calling pactl.
My application calls pactl per three seconds.The process time for pactl
 is not so log time. But process time seems to be accumulated by calling pactl.

Best Regards,
Shinnosuke Suzuki

> 2018/05/01 17:33、Tanu Kaskinen <tanuk at iki.fi>のメール:
> 
> On Tue, 2018-05-01 at 10:00 +0900, Shinnosuke Suzuki wrote:
>> Hi,
>> 
>>> Thank you for your advice.
>>> I would like to use libpulse, but I couldn’t make it properly.
>>> So I use parec/pacat command.
>>> I'll get information from “pactl list cards”.
>> 
>> I could get status for bluetooth headset connection with pactl.
>> But pactl command seems to use exclusion control, when I use pact/parec to send/recv voice packet, 
>> pactl command stops voice packet of pact/parec only while executing pactl command.
>> I confirmed parec pact and pactl with trace-cmd.
> 
> It's true that when the server processes the "list cards" command from
> pactl, packets to/from parec/pacat are not processed during time, but
> sending the card information shouldn't take a long time, so it sounds
> strange that you'd observe audio drop-outs. Does your application
> perhaps itself stop processing the audio to/from pacat/parec while it's
> running pactl?
> 
> What latency parameters do you give to parec and pacat? If you increase
> the latency, does that get rid of the audio drop-outs?
> 
>> I would like to implement monitoring bluetooth connection during the voice call with bluetooth headset.
>> Is there any solution on this?
>> Do I have to use pa_context_get_card_info_list of libpulse?
> 
> If the problem is at the server side, then using
> pa_context_get_card_info_list() won't help, because that's what pactl
> uses anyway. But I'm not sure if the problem is in the server or in
> your application.
> 
> -- 
> Tanu
> 
> https://liberapay.com/tanuk
> https://www.patreon.com/tanuk

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