player: loadfile for mpv v0.38.0, fix #823 (#824)

pickup from upstream: jaseg/python-mpv@d96eaf7

feeluown/mpv.py

@@ -863,6 +863,8 @@ def __init__(self, *extra_mpv_flags, log_handler=None, start_event_thread=True,
  self._event_thread.start()
  else:
  self._event_thread = None
+ if m := re.search(r'(\d+)\.(\d+)\.(\d+)', self.mpv_version):
+ self.mpv_version_tuple = tuple(map(int, m.groups()))
 
  def _loop(self):
  for event in _event_generator(self._event_handle):
@@ -1152,9 +1154,16 @@ def playlist_play_index(self, idx):
  def _encode_options(options):
  return ','.join('{}={}'.format(_py_to_mpv(str(key)), str(val)) for key, val in options.items())
 
- def loadfile(self, filename, mode='replace', **options):
+ def loadfile(self, filename, mode='replace', index=None, **options):
  """Mapped mpv loadfile command, see man mpv(1)."""
- self.command('loadfile', filename.encode(fs_enc), mode, MPV._encode_options(options))
+ if self.mpv_version_tuple >= (0, 38, 0):
+ if index is None:
+ index = -1
+ self.command('loadfile', filename.encode(fs_enc), mode, index, MPV._encode_options(options))
+ else:
+ if index is not None:
+ warn(f'The index argument to the loadfile command is only supported on mpv >= 0.38.0')
+ self.command('loadfile', filename.encode(fs_enc), mode, MPV._encode_options(options))
 
  def loadlist(self, playlist, mode='replace'):
  """Mapped mpv loadlist command, see man mpv(1)."""