annotate implementations/midi-db/batch-midifiles-db.lisp @ 310:f99fd6a7bbfc

Add midi-db.

Ignore-this: c6f4fc32efa4453ddbdc478793eedd52

A basic implementation for working with MIDI files stored in the database.

It is a test case for `versioned' data, but only partially implemented at the moment.

darcs-hash:20100223152703-16a00-4388d2720907d777a1c6c6b3a010885ce0fe06a7.gz

(cl:in-package #:amuse-midi-db)

(defun import-midifiles (path collection-identifier database)
  "<Path> should be a string or pathname object, which designates a
  directory containing midifiles to be imported,
  e.g. '/home/foo/my-midi-files/' (note trailing slash)."
  (let ((midifile-paths
	 (append (directory (merge-pathnames path "*.mid*"))
		 (directory (merge-pathnames path "*.MID*")))))
    (unless midifile-paths
      (warn "No midifiles in: ~A" path)
      (return-from import-midifiles nil))
    (loop for midifile-path in midifile-paths
       for i from 1
       do (import-composition
	   (get-composition
	    (make-midifile-identifier midifile-path))
	   collection-identifier database)
       finally (format t "~S midifiles added to database.~%" i))))