Add support for alt brown background in music scan

music.py

@@ -14,6 +14,7 @@
 BG_COLOR1 = (240, 210, 100)
 BG_COLOR2 = (226, 119, 79)
 BG_COLOR3 = (49, 60, 102)
+BG_COLOR4 = (83, 117, 173)
 
 
 class SongCover:
@@ -32,11 +33,7 @@ def __repr__(self):
 def detect(frame: numpy.ndarray) -> bool:
     """Detects if a given frame is showing the music list."""
     color = frame[:20, 1220:1250].mean(axis=(0, 1))
-    if numpy.linalg.norm(color - BG_COLOR1) < 15:
-        return True
-    if numpy.linalg.norm(color - BG_COLOR2) < 15:
-        return True
-    if numpy.linalg.norm(color - BG_COLOR3) < 15:
+    if _is_background(color):
         return True
     return False
 
@@ -170,16 +167,24 @@ def _remove_blanks(all_icons: List[numpy.ndarray]) -> List[numpy.ndarray]:
     filtered_icons = []
     for icon in all_icons:
         color = icon[5:25, 60:200].mean(axis=(0, 1))
-        if numpy.linalg.norm(color - BG_COLOR1) < 15:
-            continue
-        if numpy.linalg.norm(color - BG_COLOR2) < 15:
-            continue
-        if numpy.linalg.norm(color - BG_COLOR3) < 15:
+        if _is_background(color):
             continue
         filtered_icons.append(icon)
     return filtered_icons
 
 
+def _is_background(color: numpy.ndarray) -> bool:
+    if numpy.linalg.norm(color - BG_COLOR1) < 15:
+        return True
+    if numpy.linalg.norm(color - BG_COLOR2) < 15:
+        return True
+    if numpy.linalg.norm(color - BG_COLOR3) < 15:
+        return True
+    if numpy.linalg.norm(color - BG_COLOR4) < 15:
+        return True
+    return False
+
+
 @functools.lru_cache()
 def _get_song_db() -> List[SongCover]:
     """Fetches the song cover database for a given locale, with caching."""

testdata/extra.json

@@ -17,6 +17,7 @@
     "critters_seacreatures_img.jpg": ["abalone", "acorn barnacle", "flatworm", "gazami crab", "giant isopod", "gigas giant clam", "horseshoe crab", "mantis shrimp", "moon jellyfish", "mussel", "octopus", "pearl oyster", "scallop", "sea anemone", "sea grapes", "sea pineapple", "sea slug", "sea star", "sea urchin", "seaweed", "slate pencil urchin", "spotted garden eel", "tiger prawn", "vampire squid", "whelk"], 
     "music_dark.mp4": ["Agent K.K.", "Bubblegum K.K.", "Caf\u00e9 K.K.", "I Love You", "K.K. Adventure", "K.K. Aria", "K.K. Bossa", "K.K. Casbah", "K.K. Cruisin'", "K.K. D&B", "K.K. Dirge", "K.K. Disco", "K.K. Faire", "K.K. Flamenco", "K.K. Folk", "K.K. Gumbo", "K.K. House", "K.K. Island", "K.K. Jongara", "K.K. Mambo", "K.K. Metal", "K.K. Parade", "K.K. Rally", "K.K. Rock", "K.K. Rockabilly", "K.K. Safari", "K.K. Soul", "K.K. Steppe", "K.K. Synth", "K.K. Waltz", "Only Me", "Spring Blossoms", "Stale Cupcakes", "Steep Hill", "To the Edge", "Welcome Horizons"], 
     "music_brown.mp4": ["Agent K.K.", "Bubblegum K.K.", "Caf\u00e9 K.K.", "Farewell", "Imperial K.K.", "K.K. Birthday", "K.K. Casbah", "K.K. Country", "K.K. Dirge", "K.K. Dixie", "K.K. Faire", "K.K. Flamenco", "K.K. House", "K.K. Island", "K.K. Jongara", "K.K. Lament", "K.K. Love Song", "K.K. Marathon", "K.K. March", "K.K. Oasis", "K.K. Ragtime", "K.K. Rally", "K.K. Rockabilly", "K.K. Samba", "K.K. Sonata", "K.K. Stroll", "K.K. Synth", "K.K. Tango", "K.K. Technopop", "K.K. \u00c9tude", "King K.K.", "Mountain Song", "Mr. K.K.", "My Place", "Neapolitan", "Rockin' K.K.", "Soulful K.K.", "Space K.K.", "Spring Blossoms", "Stale Cupcakes", "Surfin' K.K.", "The K. Funk", "To the Edge", "Wandering", "Welcome Horizons"], 
+    "music_brown2.mp4": ["Agent K.K.", "Aloha K.K.", "Animal City", "Bubblegum K.K.", "Café K.K.", "Chillwave", "Comrade K.K.", "DJ K.K.", "Drivin'", "Farewell", "Forest Life", "Go K.K. Rider", "Hypno K.K.", "I Love You", "Imperial K.K.", "K.K. Adventure", "K.K. Aria", "K.K. Ballad", "K.K. Bashment", "K.K. Bazaar", "K.K. Birthday", "K.K. Blues", "K.K. Bossa", "K.K. Break", "K.K. Calypso", "K.K. Casbah", "K.K. Chorale", "K.K. Chorinho", "K.K. Condor", "K.K. Country", "K.K. Cruisin'", "K.K. D&B", "K.K. Dirge", "K.K. Disco", "K.K. Dixie", "K.K. Dub", "K.K. Faire", "K.K. Flamenco", "K.K. Folk", "K.K. Fugue", "K.K. Fusion", "K.K. Groove", "K.K. Gumbo", "K.K. Hop", "K.K. House", "K.K. Island", "K.K. Jazz", "K.K. Jongara", "K.K. Khoomei", "K.K. Lament", "K.K. Love Song", "K.K. Lovers", "K.K. Lullaby", "K.K. Mambo", "K.K. Marathon", "K.K. March", "K.K. Mariachi", "K.K. Metal", "K.K. Milonga", "K.K. Moody", "K.K. Oasis", "K.K. Parade", "K.K. Polka", "K.K. Ragtime", "K.K. Rally", "K.K. Reggae", "K.K. Rock", "K.K. Rockabilly", "K.K. Safari", "K.K. Salsa", "K.K. Samba", "K.K. Ska", "K.K. Slack-Key", "K.K. Sonata", "K.K. Song", "K.K. Soul", "K.K. Steppe", "K.K. Stroll", "K.K. Swing", "K.K. Synth", "K.K. Tango", "K.K. Technopop", "K.K. Waltz", "K.K. Western", "K.K. Étude", "King K.K.", "Lucky K.K.", "Marine Song 2001", "Mountain Song", "Mr. K.K.", "My Place", "Neapolitan", "Only Me", "Pondering", "Rockin' K.K.", "Soulful K.K.", "Space K.K.", "Spring Blossoms", "Stale Cupcakes", "Steep Hill", "Surfin' K.K.", "The K. Funk", "To the Edge", "Two Days Ago", "Wandering", "Welcome Horizons"], 
     "music_img.jpg": ["Animal City", "K.K. Gumbo", "K.K. Swing", "K.K. Tango", "K.K. Technopop", "Welcome Horizons"], 
     "music_img2.jpg": ["Agent K.K.", "Bubblegum K.K.", "Caf\u00e9 K.K.", "I Love You", "K.K. Adventure", "K.K. Aria", "K.K. Bossa"], 
     "music_short_end.mp4": ["Agent K.K.", "Aloha K.K.", "Animal City", "Bubblegum K.K.", "Caf\u00e9 K.K.", "Comrade K.K.", "Drivin'", "Forest Life", "Hypno K.K.", "I Love You", "K.K. Bazaar", "K.K. Blues", "K.K. Bossa", "K.K. Calypso", "K.K. Casbah", "K.K. Condor", "K.K. Faire", "K.K. Flamenco", "K.K. Fusion", "K.K. Groove", "K.K. Gumbo", "K.K. Island", "K.K. Mambo", "K.K. March", "K.K. Moody", "K.K. Oasis", "K.K. Parade", "K.K. Ragtime", "K.K. Rally", "K.K. Rock", "K.K. Rockabilly", "K.K. Safari", "K.K. Sonata", "K.K. Song", "K.K. Soul", "K.K. Swing", "K.K. Tango", "K.K. \u00c9tude", "Marine Song 2001", "My Place", "Neapolitan", "Pondering", "Space K.K.", "Spring Blossoms", "Stale Cupcakes", "The K. Funk", "To the Edge", "Welcome Horizons"],