[gnome-music/wip/mschraal/tageditor: 13/16] Add GrlChromaprint wrapper

[Marinus Schraal <mschraal src gnome org>]

commit 3e21544917cf88af90af3d01088f46fdad033bf3
Author: Marinus Schraal <mschraal gnome org>
Date:   Fri Nov 22 15:01:07 2019 +0100

    Add GrlChromaprint wrapper

 gnomemusic/grilowrappers/grlacoustidwrapper.py    | 11 +--
 gnomemusic/grilowrappers/grlchromaprintwrapper.py | 93 +++++++++++++++++++++++
 2 files changed, 96 insertions(+), 8 deletions(-)
---
diff --git a/gnomemusic/grilowrappers/grlacoustidwrapper.py b/gnomemusic/grilowrappers/grlacoustidwrapper.py
index 0cfc950e..e66a1625 100644
--- a/gnomemusic/grilowrappers/grlacoustidwrapper.py
+++ b/gnomemusic/grilowrappers/grlacoustidwrapper.py
@@ -23,11 +23,11 @@
 # delete this exception statement from your version.
 
 import gi
-gi.require_versions("Grl": "0.3")
+gi.require_version("Grl", "0.3")
 from gi.repository import Grl, GObject
 
 
-class GrlAcoustID(GObject.GObject):
+class GrlAcoustIDWrapper(GObject.GObject):
     """Wrapper for the Grilo AcoustID source.
     """
 
@@ -46,16 +46,11 @@ class GrlAcoustID(GObject.GObject):
         Grl.METADATA_KEY_TRACK_NUMBER
     ]
 
-    def __init__(
-            self, source, coremodel, application, grilo, tracker_wrapper):
+    def __init__(self, source, grilo):
         """Initialize the AcoustID wrapper
 
         :param Grl.TrackerSource source: The Tracker source to wrap
-        :param CoreModel coremodel: CoreModel instance to use models
-        from
-        :param Application application: Application instance
         :param CoreGrilo grilo: The CoreGrilo instance
-        :param TrackerWrapper tracker_wrapper: The TrackerWrapper instance
         """
         super().__init__()
 
diff --git a/gnomemusic/grilowrappers/grlchromaprintwrapper.py 
b/gnomemusic/grilowrappers/grlchromaprintwrapper.py
new file mode 100644
index 00000000..2e02ea4f
--- /dev/null
+++ b/gnomemusic/grilowrappers/grlchromaprintwrapper.py
@@ -0,0 +1,93 @@
+# Copyright 2019 The GNOME Music developers
+#
+# GNOME Music is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# GNOME Music is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with GNOME Music; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# The GNOME Music authors hereby grant permission for non-GPL compatible
+# GStreamer plugins to be used and distributed together with GStreamer
+# and GNOME Music.  This permission is above and beyond the permissions
+# granted by the GPL license by which GNOME Music is covered.  If you
+# modify this code, you may extend this exception to your version of the
+# code, but you are not obligated to do so.  If you do not wish to do so,
+# delete this exception statement from your version.
+
+import gi
+gi.require_version("Grl", "0.3")
+from gi.repository import Grl, GObject
+
+
+class GrlChromaprintWrapper(GObject.GObject):
+    """Wrapper for the Grilo Chromaprint source.
+    """
+
+    _acoustid_api_key = "Nb8SVVtH1C"
+
+    _ACOUSTID_METADATA_KEYS = [
+        Grl.METADATA_KEY_ALBUM,
+        Grl.METADATA_KEY_ALBUM_DISC_NUMBER,
+        Grl.METADATA_KEY_ARTIST,
+        Grl.METADATA_KEY_CREATION_DATE,
+        Grl.METADATA_KEY_MB_ARTIST_ID,
+        Grl.METADATA_KEY_MB_RECORDING_ID,
+        Grl.METADATA_KEY_MB_RELEASE_GROUP_ID,
+        Grl.METADATA_KEY_MB_RELEASE_ID,
+        Grl.METADATA_KEY_TITLE,
+        Grl.METADATA_KEY_TRACK_NUMBER
+    ]
+
+    def __init__(self, source, grilo):
+        """Initialize the Chromaprint wrapper
+
+        :param Grl.TrackerSource source: The Tracker source to wrap
+        :param CoreGrilo grilo: The CoreGrilo instance
+        """
+        super().__init__()
+
+        self._source = source
+        self._grilo = grilo
+
+        self._fingerprint_key = self._grilo._registry.lookup_metadata_key(
+            "chromaprint")
+
+        self._METADATA_KEYS = [
+            self._fingerprint_key,
+            Grl.METADATA_KEY_DURATION
+        ]
+
+    def get_chromaprint(self, media, callback):
+        if self._fingerprint_key == Grl.METADATA_KEY_INVALID:
+            callback(None)
+            return
+
+        chromaprint = media.get_string(self._fingerprint_key)
+        if chromaprint is not None:
+            callback(media)
+            return
+
+        options = Grl.OperationOptions()
+        options.set_resolution_flags(
+            Grl.ResolutionFlags.FAST_ONLY
+            | Grl.ResolutionFlags.IDLE_RELAY)
+
+        def chromaprint_resolved(source, op_id, media, callback, error):
+            if error:
+                print("Error {}: {}".format(error.domain, error.message))
+                callback(None)
+                return
+
+            callback(media)
+
+        self._source.resolve(
+            media, self._METADATA_KEYS, options, chromaprint_resolved,
+            callback)