vidi-player.py: move the actual processing after the arguments validation

[vidi-player.git] / vidi-player.py

diff --git a/vidi-player.py b/vidi-player.py
index 62ae575..491a3f3 100755 (executable)
--- a/vidi-player.py
+++ b/vidi-player.py
@@ -86,16 +86,20 @@ def main():
         usage()
         return 1
 
-    midi_file = mido.MidiFile(sys.argv[1])
+    if not os.path.isdir(sys.argv[2]):
+        sys.stderr.write("The second argument must be the path of the videofont directory\n")
+        usage()
+        return 1
 
-    overlapping_notes = check_overlapping_notes(midi_file)
-    if overlapping_notes:
-        sys.stderr.write("Sorry, supporting only midi file with no overlapping notes")
+    if len(sys.argv) > 3 and os.path.exists(sys.argv[3]):
+        sys.stderr.write("File '%s' exists, exiting!\n" % sys.argv[3])
         return 1
 
-    if not os.path.isdir(sys.argv[2]):
-        sys.stderr.write("The second argument must be the path of the videofont directory")
-        usage()
+    midi_file = mido.MidiFile(sys.argv[1])
+
+    overlapping_notes = check_overlapping_notes(midi_file, 0)
+    if overlapping_notes:
+        sys.stderr.write("Sorry, supporting only midi file with no overlapping notes on channel 0\n")
         return 1
 
     video_font_path = os.path.realpath(sys.argv[2])