From: Aldrin Martoq <amartoq@dcc.uchile.cl>
To: "Pharaoh ." <pharaoh137@gmail.com>
Cc: Takashi Iwai <tiwai@suse.de>, alsa-devel@alsa-project.org
Subject: Re: ALSA MIDI interface - plugin
Date: Mon, 18 Feb 2008 14:58:56 -0300 [thread overview]
Message-ID: <1203357536.6312.13.camel@localhost> (raw)
In-Reply-To: <61445c750802180647l3604fd9fk43426018d9a80e4b@mail.gmail.com>
On Mon, 2008-02-18 at 20:17 +0530, Pharaoh . wrote:
> On Feb 15, 2008 10:23 PM, Takashi Iwai <tiwai@suse.de> wrote:
> > At Thu, 14 Feb 2008 20:54:28 +0530,
> > Pharaoh . wrote:
> > > Now, I have to support rawmidi interface also. Is it possible to write a
> > > userspace
> > > plugin for making MIDI work? Where can I get sample code etc?
> > Another possibility is to write an ALSA sequencer client, and load
> > snd-virmidi driver. Then you can connect to a rawmidi device as you
> > like.
> Thanks Takashi, I am not sure I understood this fully..Can you point me to
> some sample
> code or relevant documentation.
Look the code of aseqdump from alsa-utils project. You don't need
anything related to kernel, just a normal client that creates a port and
listens for events. Once you receive a MIDI event, process it and do the
magic in your card.
$ aseqdump
Waiting for data at port 129:0. Press Ctrl+C to end.
Source_ Event_________________ Ch _Data__
$ aconnect -iol
$ aplaymidi -p 129:0 /usr/share/denemo/manual/4for2new.midi
Please note that with the alsaseq API you receive processed MIDI data...
This could be a plus for your development (you don't have to implement
the low-level midi parser). Timidity is a software synth that follow
this approach.
About snd-virmidi, is almost the same, but the port is a 'kernel port'
and it represents a virtual card. I'm not sure what advantages has it.
--
Aldrin Martoq <amartoq@dcc.uchile.cl>
next prev parent reply other threads:[~2008-02-18 17:59 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-14 15:24 ALSA MIDI interface - plugin Pharaoh .
2008-02-15 16:53 ` Takashi Iwai
2008-02-18 14:47 ` Pharaoh .
2008-02-18 17:58 ` Aldrin Martoq [this message]
2008-02-19 8:06 ` Clemens Ladisch
2008-02-20 0:39 ` Pharaoh .
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