joearms/cocoa

cocoa and midi native interaface

cocoa's Issues

Unable to use with Elixir

Hello,

First off, thanks for your hard work. I'm very new to Elixir (erlang-r16) and am running OSX 10.7.5. I'd really like to play with MIDI in elixir, but am struggling to understand how to use this via interop.

Here's what I've done so far to try to get this working:

I editied the Makefiles in au and midi_interface as it seemed like these were the things I might want to play with. I changed the paths to point at the more recent versions of erl_interface and erts. In au everything built just fine without changing -arch i386 to -arch x86_64. The same wasn't true for midi_interface. In order to get further I tried to switch -arch i386 to -arch x86_64 because I was getting architecture-related errors when trying to build.

cocoa/midi_interface master ♺ (solo)> make
erlc -W cocoa_test.erl
erlc -W midi_nifs.erl
midi_nifs.erl:19: Warning: variable 'X' is unused
midi_nifs.erl:34: Warning: variable 'I' is unused
midi_nifs.erl:34: Warning: variable 'Pid' is unused
erlc -W midi_test.erl
midi_test.erl:15: Warning: variable 'E' is unused
midi_test.erl:25: Warning: variable 'T' is unused
gcc -c -arch x86_64 -g -Wall -fPIC\
            -I/usr/local/lib/erlang/lib/erl_interface-3.7.11/include\
            -I/usr/local/lib/erlang/erts-5.10.1/include midi_nifs.c
midi_nifs.c: In function ‘list_audio_components’:
midi_nifs.c:57: warning: passing argument 1 of ‘AudioComponentCount’ from incompatible pointer type
cc midi_nifs.o -arch x86_64\
                       -framework CoreMIDI\
                       -framework CoreAudio\
                       -framework AudioUnit\
                       -framework CoreServices\
                       -bundle -flat_namespace -undefined suppress\
                       -L/usr/local/lib/erlang/lib/erl_interface-3.7.11/lib\
                       -lerl_interface -lei -o midi_nifs.so
erl -s midi_test start
Erlang R16B (erts-5.10.1) [source] [64-bit] [smp:8:8] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]

Starting midi tests ...
Finding devices ...
{z,ok}
make: *** [all] Segmentation fault: 11

Despite this, I decided I'd try and hook it up to to elixir. I added this to my mix.exs:

defp deps do
  [{:midi_nifs, path: "../cocoa/midi_interface", app: false}]
end

I then ran mix deps and got an ok.
Then: iex -S mix
Then: iex(1)> :midi_nifs.module_info

It couldn't find the module. So, I tried doing what someone from the channel suggested for a different, much older and completely broken midi library: I moved the *.beam files into a directory under midi_interface named ebin.

I tried the same thing again and this time it seemed to know what I was talking about, except it blows up because it cannot find midi_nifs.so.

What can I do to make cocoa play nice with elixir?

Thanks in advance!
Devin