Lmms support

Author: andrewrk

daw/__init__.py

@@ -4,14 +4,16 @@ def dawFor(projectFile):
     """
     Picks the daw class that is best suited for opening projectFile.
     """
-    from flstudio import FlStudio
-    from dummy import Dummy
+    from .flstudio import FlStudio
+    from .lmms import Lmms
+    from .dummy import Dummy
 
-    _class_list = (
+    class_tuple = (
         FlStudio,
+        Lmms,
     )
 
-    for item in _class_list:
+    for item in class_tuple:
         if item.isValid(projectFile):
             return item
 

daw/dummy.py

@@ -1,4 +1,4 @@
-from exceptions import LoadError
+from .exceptions import LoadError
 
 class Dummy():
     "the interface used for a daw object"

daw/flstudio.py

@@ -1,5 +1,5 @@
-from exceptions import LoadError
-from dummy import Dummy
+from .exceptions import LoadError
+from .dummy import Dummy
 import flp
 
 class FlStudio(Dummy):

daw/lmms.py

@@ -1 +1,108 @@
+from .dummy import Dummy
+from .exceptions import LoadError
+from xml.dom import minidom
+import zlib
+import struct
+
+def _uncompress(data):
+    return zlib.decompress(data[4:])
+
+def _compress(data):
+    return zlib.compress(struct.pack(">i", len(data)) + data)
+
+def _getdoc(projectFile):
+    f = open(projectFile, 'rb')
+    data = f.read()
+    f.close()
+
+    # try to parse as xml
+    try:
+        doc = minidom.parseString(data)
+    except:
+        # try to decompress
+        try:
+            data = _uncompress(data)
+        except zlib.error:
+            return None
+        # try to parse result as xml
+        try: 
+            doc = minidom.parseString(data)
+        except:
+            return None
+
+    return doc
+
+class Lmms(Dummy):
+    canReadFile = True
+    canMerge = False
+    canRender = False
+    fileExtensions = ('mmp', 'mmpz')
+    identifier = 'lmms'
+
+    @staticmethod
+    def isValid(inProject):
+        doc = _getdoc(inProject)
+        if doc is None:
+            return False
+
+        # cool, we have an xml document. now make sure it's lmms
+        if doc.doctype.name != u'multimedia-project':
+            return False
+
+        doms = doc.getElementsByTagName('multimedia-project')
+        if len(doms) != 1:
+            return False
+
+        dom = doms[0]
+        if dom.getAttribute('creator') != u'Linux MultiMedia Studio (LMMS)':
+            return False
+
+        if dom.getAttribute('type') != u'song':
+            return False
+
+        return True
+
+    def load(self, inProject):
+        self.doc = _getdoc(inProject)
+        assert self.doc is not None
+
+    def save(self, outProject):
+        f = open(outProject, 'w')
+        f.write(_compress(self.doc.toxml()))
+        f.close()
+
+    def extension(self):
+        return 'mmpz'
+
+    def samples(self):
+        doms = self.doc.getElementsByTagName('audiofileprocessor')
+        return list(set([dom.getAttribute('src') for dom in doms]))
+
+    def effects(self):
+        def effectName(dom):
+            name = dom.getAttribute('name')
+            if name == u'ladspaeffect':
+                children = dom.getElementsByTagName('key')
+                assert len(children) == 1
+                child = children[0]
+                children = child.getElementsByTagName('attribute')
+                for node in children:
+                    if node.getAttribute('name') == u'plugin':
+                        name = node.getAttribute('value')
+                        break
+            return name
+        doms = self.doc.getElementsByTagName('effect')
+        return list(set([effectName(dom) for dom in doms]))
+
+    def generators(self):
+        doms = self.doc.getElementsByTagName('instrument')
+        return list(set([dom.getAttribute('name') for dom in doms]))
+
+    def tempo(self):
+        doms = self.doc.getElementsByTagName('head')
+        for dom in doms:
+            if dom.parentNode.localName == u'multimedia-project':
+                return int(dom.getAttribute('bpm'))
+                break
+        raise LoadError("Project does not contain <head/>")
 

sample/cpr/Brandon_Strader_-_Mysterious_Power__just64compo_-_Round_004__JHC004__.cpr

@@ -0,0 +1,2 @@
+Cubase project file:
+http://www.steinberg.net/en/home.html

sample/cpr/info

@@ -0,0 +1,2 @@
+Cakewalk Sonar Project
+http://www.cakewalk.com/

sample/cwp/Cyril_the_Wolf_-_Body_Stops__just64compo_-_Round_004__JHC004__.cwp

@@ -0,0 +1,2 @@
+FL Studio Project
+http://flstudio.image-line.com/