X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;ds=sidebyside;f=youtube_dl%2Futils.py;h=9190a8fb85f7e9cc53c06c9699468502de486033;hb=c0292e8ab716ea48655a4d301b4ca34ddbe24250;hp=116eb3610d2fb4cc0edbb4491faebe29ff90afe0;hpb=d1b9c912a42de3b99ae73553d38fbfa50b8ebc52;p=youtube-dl

diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 116eb3610..9190a8fb8 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -1245,7 +1245,10 @@ class HEADRequest(compat_urllib_request.Request):
         return "HEAD"
 
 
-def int_or_none(v, scale=1, default=None):
+def int_or_none(v, scale=1, default=None, get_attr=None):
+    if get_attr:
+        if v is not None:
+            v = getattr(v, get_attr, None)
     return default if v is None else (int(v) // scale)
 
 
@@ -1406,3 +1409,14 @@ US_RATINGS = {
 
 def strip_jsonp(code):
     return re.sub(r'(?s)^[a-zA-Z_]+\s*\(\s*(.*)\);\s*?\s*$', r'\1', code)
+
+
+def qualities(quality_ids):
+    """ Get a numeric quality value out of a list of possible values """
+    def q(qid):
+        try:
+            return quality_ids.index(qid)
+        except ValueError:
+            return -1
+    return q
+