linux's SNDCTL_SEQ_RT_ENABLE and perl's MIDI::Music

linux's SNDCTL_SEQ_RT_ENABLE and perl's MIDI::Music

[fn ln]

 Hi,

 I would like to use perl, I guess, to record what an
external device plays, and then be able to play it
back.

http://www.perl.com/CPAN-local/authors/id/S/SE/SETHJ/MIDI-Music-0.01.tar.gz

 needs SNDCTL_SEQ_RT_ENABLE so it can record MIDI
events and calcualtes the delta times itself, I guess.

 What do I need to do to make MIDI::Music work ?
Do I need to patch MIDI::Music.xs or do I need to
patch ALSA ? What would be easier ? 

searching through /usr/src/linux/alsa-driver-0.5.11
for SNDCTL_SEQ_RT_ENABLE yielded no results, neither
did
http://www.google.com/search?q=alsa+SNDCTL_SEQ_RT_ENABLE&btnG=Google+Search

   Thanks,

      John


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Re: linux's SNDCTL_SEQ_RT_ENABLE and perl's MIDI::Music

[Paul Davis]

> I would like to use perl, I guess, to record what an
>external device plays, and then be able to play it
>back.
>
>http://www.perl.com/CPAN-local/authors/id/S/SE/SETHJ/MIDI-Music-0.01.tar.gz
>
> needs SNDCTL_SEQ_RT_ENABLE so it can record MIDI
>events and calcualtes the delta times itself, I guess.
>
> What do I need to do to make MIDI::Music work ?
>Do I need to patch MIDI::Music.xs or do I need to
>patch ALSA ? What would be easier ? 
>
>searching through /usr/src/linux/alsa-driver-0.5.11
>for SNDCTL_SEQ_RT_ENABLE yielded no results, neither
>did
>http://www.google.com/search?q=alsa+SNDCTL_SEQ_RT_ENABLE&btnG=Google+Search

i am not sure about the sequencer API specifically, but in general,
the ALSA API in 0.5.X bears little resemblance to the one in
0.9.X. porting software from one to the other is not hard, but its not
just a matter of "this ioctl is missing, use this one instead". 

takashi can comment more fruitfully on the sequencer API in
particular.

--p

Re: linux's SNDCTL_SEQ_RT_ENABLE and perl's MIDI::Music

[Takashi Iwai]

At Tue, 26 Mar 2002 17:52:30 -0500 (EST),
fn ln wrote:
> 
>  Hi,
> 
>  I would like to use perl, I guess, to record what an
> external device plays, and then be able to play it
> back.
> 
> http://www.perl.com/CPAN-local/authors/id/S/SE/SETHJ/MIDI-Music-0.01.tar.gz
> 
>  needs SNDCTL_SEQ_RT_ENABLE so it can record MIDI
> events and calcualtes the delta times itself, I guess.

where is it defined?
this is not found in OSS/Free, so i guess it's (commercial) OSS
specific.  if my guess is correct, then i don't rocommend to use this
ioctl, not only because alsa doesn't support it.

 
Takashi

Re: linux's SNDCTL_SEQ_RT_ENABLE and perl's MIDI::Music

[fn ln]

 I have an impression that ALSA is not *competing*, my
understanding was that it is a fully-compatible
alternative which compatibly fulfills and further
extends functionality of OSS.

 I expect that ALSA provides a compatible mechanism,
but perhaps the correspondig symbol is called
SEQ_REALTIME_ALSA_OPT or something like that (I don't
know, that's why I'm asking.)

 Further I've noticed that ALSA had a lot of OSS
compatibility code.

   thanks

      John


--- "c. church" <dolljunkie@digitalkoma.com> wrote:
> >  What do I need to do to make MIDI::Music work ?
> > Do I need to patch MIDI::Music.xs or do I need to
> > patch ALSA ? What would be easier ?
> 
> I don't think you can use ALSA, the MIDI::Music
> readme says it requires OSS
> >= v3.8 (OSS and ALSA are competing sound drivers,
> if I remember correctly)
> 
> !c
> 


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