On Fri, 20 Sep 2019 09:35:59 +0200, Tanu Kaskinen wrote:
On Thu, 2019-09-19 at 14:12 -0700, frederik@ofb.net wrote:
Thank you for the tips.
I don't know if my input is still needed, but I figured out from looking at some of the syntax you linked to that I can put this in ~/.asoundrc and it does the job (this is what I had had in mind when I asked about "magic with macros", it is somewhat advanced for me):
pcm.!pulse { @args [ DEV ] @args.DEV { type string default "default" } type pulse; device $DEV }Now I can set up a filter like this:
ecasound -i alsa,pulse:mic -o alsa,pulse:monitorIs something like this going into the alsa-plugins repo?
I'm sure something like this will be accepted if you submit a patch. I got the impression that Takashi isn't willing to write the patch himself, and nor am I, so you're in the best position to make this happen.
I have a test patch but had no chance to test the stuff at all currently as I am (and will be for the next few weeks) traveling.
Note that
default "default"doesn't do the intended thing with the current pcm_pulse.c code. With the current code the plugin will request PulseAudio to use a device named "default", which most likely won't exist and playback or recording will fail. The plugin code needs to pass NULL as the device name to pa_stream_connect_playback() and pa_stream_connect_record() when it detects that the default device is requested, so you'll need to modify pcm_pulse.c in order to make this work. Instead of "default" as the special string in the configuration, I suggested using "".
Below is the totally untested patch (even not build-tested!) If anyone interested, feel free to cook it.
thanks,
Takashi
--- diff --git a/pulse/50-pulseaudio.conf b/pulse/50-pulseaudio.conf index 62da207af9ca..916258d942af 100644 --- a/pulse/50-pulseaudio.conf +++ b/pulse/50-pulseaudio.conf @@ -1,7 +1,13 @@ # Add a specific named PulseAudio pcm and ctl (typically useful for testing)
pcm.pulse { + @args [ DEVICE ] + @args.DEVICE { + type string + default "" + } type pulse + device $DEVICE hint { show { @func refer diff --git a/pulse/ctl_pulse.c b/pulse/ctl_pulse.c index fbb6eae2ec76..9b820fd04b15 100644 --- a/pulse/ctl_pulse.c +++ b/pulse/ctl_pulse.c @@ -664,6 +664,8 @@ SND_CTL_PLUGIN_DEFINE_FUNC(pulse) if (snd_config_get_string(n, &server) < 0) { SNDERR("Invalid type for %s", id); return -EINVAL; + } else if (!*server) { + server = NULL; } continue; } @@ -671,6 +673,8 @@ SND_CTL_PLUGIN_DEFINE_FUNC(pulse) if (snd_config_get_string(n, &device) < 0) { SNDERR("Invalid type for %s", id); return -EINVAL; + } else if (!*device) { + device = NULL; } continue; } @@ -678,6 +682,8 @@ SND_CTL_PLUGIN_DEFINE_FUNC(pulse) if (snd_config_get_string(n, &source) < 0) { SNDERR("Invalid type for %s", id); return -EINVAL; + } else if (!*source) { + source = NULL; } continue; } @@ -685,6 +691,8 @@ SND_CTL_PLUGIN_DEFINE_FUNC(pulse) if (snd_config_get_string(n, &sink) < 0) { SNDERR("Invalid type for %s", id); return -EINVAL; + } else if (!*sink) { + sink = NULL; } continue; } diff --git a/pulse/pcm_pulse.c b/pulse/pcm_pulse.c index 283174357e8b..869c9b674c6b 100644 --- a/pulse/pcm_pulse.c +++ b/pulse/pcm_pulse.c @@ -1069,6 +1069,8 @@ SND_PCM_PLUGIN_DEFINE_FUNC(pulse) if (snd_config_get_string(n, &server) < 0) { SNDERR("Invalid type for %s", id); return -EINVAL; + } else if (!*server) { + server = NULL; } continue; } @@ -1076,6 +1078,8 @@ SND_PCM_PLUGIN_DEFINE_FUNC(pulse) if (snd_config_get_string(n, &device) < 0) { SNDERR("Invalid type for %s", id); return -EINVAL; + } else if (!*device) { + device = NULL; } continue; } @@ -1091,6 +1095,8 @@ SND_PCM_PLUGIN_DEFINE_FUNC(pulse) if (snd_config_get_string(n, &fallback_name) < 0) { SNDERR("Invalid value for %s", id); return -EINVAL; + } else if (!*fallback_name) { + fallback_name = NULL; } continue; }