distinguish events based on input ports

distinguish events based on input ports

[Lieven Moors]

Hi everybody,

I've just started writing my first little program with alsa,
and I had a question regarding the use of input(read) ports.
What I want to do is distinguish events based on the input port
they came through. Since the destination of the event is mostly
set to 'broadcast', I cannot extract this information from the event
itself. I would like to know if there is another way to do this, or if
it is simply impossible.

Thanks for your help,

Greetings,

Lieven

Re: distinguish events based on input ports

[Clemens Ladisch]

Lieven Moors wrote:
> I had a question regarding the use of input(read) ports.
> What I want to do is distinguish events based on the input port
> they came through. Since the destination of the event is mostly
> set to 'broadcast', I cannot extract this information from the event
> itself.

Yes you can; when delivering broadcast or to-all-subscribers events,
ALSA sets the event's destination field to the actual destination.


HTH
Clemens

Re: distinguish events based on input ports

[Lieven Moors]

Clemens Ladisch wrote:
> Lieven Moors wrote:
>   
>> I had a question regarding the use of input(read) ports.
>> What I want to do is distinguish events based on the input port
>> they came through. Since the destination of the event is mostly
>> set to 'broadcast', I cannot extract this information from the event
>> itself.
>>     
>
> Yes you can; when delivering broadcast or to-all-subscribers events,
> ALSA sets the event's destination field to the actual destination.
>
>
> HTH
> Clemens
>
>   
Thanks for confirming that. it was my own silly mistake, because i had
used snd_seq_ev_set_subs before trying to filter...

Sorry for that...

greets,

Lieven