[alsa-devel] Plug In Creation - aplay can't find existing .so

[Brandon Yates]

Hello,

I am working on a new pcm plugin. At this point it is basically just a
Hello World plugin, to make sure I have the tools working and understand
the workflow.  I created a simple file which is just basically:

#include <alsa/asoundlib.h>
#include <alsa/pcm_external.h>
SND_PCM_PLUGIN_DEFINE_FUNC(my_mod)
{	
   printf("hello world\n");
   return 0;
}
SND_PCM_PLUGIN_SYMBOL(my_mod);


I compiled this as a shared lib named  'libasound_module_pcm_my_mod.so'
and copied it to '/usr/lib/i386-linux-gnu/alsa-lib/'

I edited my ~/.asoundrc to create a new device that uses this plugin.
Then I try to use it with `aplay --device=my_mod_test out.pcm`

I get the error message

ALSA lib dlmisc.c:254:(snd1_dlobj_cache_get) Cannot open shared library
/usr/lib/i386-linux-gnu/alsa-lib/libasound_module_pcm_my_mod.so
aplay: main:682: audio open error: No such device or address


But this file actually does exist, I just copied it there.


Any idea why this happens?

Thanks much,
Brandon