[SOLVED] What package provides python:midi (audio/x-karaoke)?

I have installed and run recoll on my Fedora 15 x86_64 system. It works well, but reports a missing helper application "python:midi (audio/x-karaoke)". My package manager (yum) does not report a package python-midi or similar. I did install the nearest match I could find, which was python-portmidi.x86_64, but recoll still reports the missing helper. Can anyone tell me what I need to install to satisfy recoll?

For karaoke files, you need the midi module:
http://pypi.python.org/pypi/midi/0.2.1
And also chardet (charset and language recognition, the karaoke files are not too good at identifying this):
http://chardet.feedparser.org/

I try to keep up to date links to helper packages here:

http://www.lesbonscomptes.com/recoll/features.html

Happy singing !

Cheers,
jf

Originally Posted by medoc For karaoke files, you need the midi module: http://pypi.python.org/pypi/midi/0.2.1 And also chardet (charset and language recognition, the karaoke files are not too good at identifying this): http://chardet.feedparser.org/

Thank you for replying, medoc.

I have downloaded the files from the locations you gave. I unpacked the midi-0.2.1.tar.gz into directory midi-0.2.1, installed swig (which was a missing dependency the first time through), then ran "python setup.py install". The setup failed because of some missing files:

running install
running build
running build_py
running build_ext
building '_sequencer_alsa' extension
swigging src/sequencer_alsa/sequencer_alsa.i to src/sequencer_alsa/sequencer_alsa_wrap.c
swig -python -o src/sequencer_alsa/sequencer_alsa_wrap.c src/sequencer_alsa/sequencer_alsa.i
src/sequencer_alsa/sequencer_alsa.i:145: Error: Unable to find 'include/seq.h'
src/sequencer_alsa/sequencer_alsa.i:146: Error: Unable to find 'include/seqmid.h'
src/sequencer_alsa/sequencer_alsa.i:147: Error: Unable to find 'include/seq_event.h'
src/sequencer_alsa/sequencer_alsa.i:148: Error: Unable to find 'include/seq_midi_event.h'
src/sequencer_alsa/sequencer_alsa.i:149: Error: Unable to find 'include/error.h'
error: command 'swig' failed with exit status 1

I found that alsa-lib-devel provides all these headers under /usr/include/alsa/, so I installed that package. Unfortunately, that did not satisfy the dependencies, which is not surprising as the directory declaration is different. I found these files are referred to in ./src/sequencer_alsa/sequencer_alsa.i, so I edited that file to explicitly refer to /usr/include/alsa/[filename]. Now when I run the python installer, it throws a different error:

/usr/include/alsa/seq_event.h:260: Error: Syntax error in input(3).
error: command 'swig' failed with exit status 1

/usr/include/alsa/seq_event.h:260 is the last line (__attribute__ line) of this typedef:

/** external stored data */
typedef struct snd_seq_ev_ext {
        unsigned int len;               /**< length of data */
        void *ptr;                      /**< pointer to data (note: can be 64-bit) */
} __attribute__((packed)) snd_seq_ev_ext_t;

This looks to be a Swig problem, so I have subscribed to the Swig mailing list and posted the question there. If you happen to know what is needed to fix the error, however, feel free to reply <grin>.

Hi, and sorry for the difficulties. You do not need the alsa interface to decode karaoke files.

I'm not sure I had tried this on Linux (the alsa interface build is not tried on other platforms), or maybe I forgot about this issue on Linux. I'm going to update the doc on the web site.

You can disable the alsa interface build (if you don't need it for driving midi hardware). I didn't find a command line way to do it, you have to edit setup.py but it's very simple: just change the platform name at line 37:

37c37
< if platform.startswith('linux'):
---
> if platform.startswith('NONE'):


The midi package should then build and install without a problem.

I'm not sure that the alsa interface is actually working anyway, the py-midi package seems to be unmaintained (last version 2006).

Cheers,
jf

P.S.: My build trace:

hautmedoc$ uname
Linux
hautmedoc$ python setup.py build
No sequencer available for 'linux2' platform.
running build
[...]
copying and adjusting scripts/mididump -> build/scripts-2.7
changing mode of build/scripts-2.7/mididump from 644 to 755
hautmedoc$ sudo python setup.py install
root's password:
No sequencer available for 'linux2' platform.
running install
[...]
Writing /usr/local/lib/python2.7/site-packages/midi-0.2.1-py2.7.egg-info
hautmedoc$

That is certainly a clue. Trouble is, I don't know how much of the package recoll needs in order to index midi files. I will see if the swig mailing list gives me any clues and, if not, I will try your suggestion.

Thanks again.

It turns out that swig does not understand __attribute__ lines. The fix is to edit the .i file and insert a line:
#define __attribute__(x).

That got me to the point that gcc complained about a missing Python.h, which required me to install python-devel.

All working now. Thanks for the help.