[LAU] alsa-jack plugin... some patches.

[Robin Gareus]

On 10/29/10 04:21, torbenh wrote:
> 
> hi...
> 
> i have looked into the alsa-jack plugin. i think i fixed the main
> problem which made it cause xruns.
> 
> git://hochstrom.endofinternet.org/alsa-plugins.git
> 
> its working quite reliably here now.
> with the small fix on the xrun front. i looked at the basic usability.
> 
> i removed the pid and weird stuff from jack client name. and added an
> option to configure the client name.
> 
> ------------------------------------------------------------------
> pcm.jack {
> 	@args [ NAME ]
> 	@args.NAME {
> 		type string
> 		default "alsa-jack"
> 	}
> 	type plug
> 	slave {
> 		pcm {
> 			 type jack
> 			 client_name $NAME 
> 			 playback_ports {
> 				 0 alsa_pcm:playback_1
> 				 1 alsa_pcm:playback_2
> 			 }
> 			 capture_ports {
> 				 0 alsa_pcm:capture_1
> 				 1 alsa_pcm:capture_2
> 			 }
> 
> 		 } 
> 	}
> }
> -----------------------------------------------------------------
> 
> this makes jack:client_name devices available.
> 
> the noauto git branch also contains a more flexible not autoconnecting
> version. use with your favourite patchbay.
> 
> ------------------------------------------------------------------
> pcm.jacknoauto {
> 	@args [ NAME ]
> 	@args.NAME {
> 		type string
> 		default "alsa-jack"
> 	}
> 	type plug
> 	slave {
> 		pcm {
> 			 type jack
> 			 client_name $NAME 
> 		 } 
> 	}
> }
> -----------------------------------------------------------------
> 
> mplayers alsa backend works fine with this.
> after a bit of mucking around, i built a 32bit version here on my 64bit
> machine and had 32bit skype connected to my 64bit jackd.

very cool!

> would be nice if this could get some testing with jack2 and stuff.

Tested with jackdmp 1.9.6 (32bit) works so far.

..but I could not get your .asoundrc working. It fails with

[AO_ALSA] alsa-lib: pcm_hw.c:1293:(snd_pcm_hw_open) open
'/dev/snd/pcmC0D0p' failed (-16): Device or resource busy

I've only replaced 'libasound_module_pcm_jack.so' and kept all other
/usr/lib/alsa-lib/*.so from default-debian. Could that be an issue?

here's the .asoundrc I'm using:

pcm.!default {
        type plug
        slave { pcm "jack" }
}

pcm.jack {
        type jack
        playback_ports {
                0 system:playback_1
                1 system:playback_2
        }
        capture_ports {
                0 system:capture_1
                1 system:capture_2
        }
}

best,
robin