Better typing.

removeads.py

@@ -220,7 +220,7 @@ def get_subtitles_tracks(ffprobe_path:str, mkv_path: str) -> dict[str,str]|None:
 
 @typechecked
 def extract_srt(mkvextract:str, filename:str, subtitles:dict[str, list[int]],
-                langs:dict[Lang,str]) -> list|None:
+                langs:dict[Lang,str]) -> list[tuple[str,str,str,str]]|None:
     logger = logging.getLogger(__name__)
 
     params = [mkvextract, filename, 'tracks']
@@ -277,7 +277,8 @@ def extract_srt(mkvextract:str, filename:str, subtitles:dict[str, list[int]],
 
     return res
 
-def do_ocr(vobsubocr, idxs, duration, temporaries, dump_mem_fd=False):
+@typechecked
+def do_ocr(vobsubocr:str, idxs: list[tuple[str,str,str,str]], duration:timedelta, temporaries:list[IO[bytes]], dump_mem_fd:bool=False):
     logger = logging.getLogger(__name__)
     res = []
 
@@ -362,7 +363,8 @@ class SupportedFormat(IntEnum):
 
 # Found codec private data using mkvinfo
 @typechecked
-def get_codec_private_data_from_mkv(mkvinfo_path:str, input_file: IO[bytes]) -> tuple[int, bytes]:
+def get_codec_private_data_from_mkv(mkvinfo_path:str, 
+                                    input_file: IO[bytes]) -> tuple[int, bytes]|tuple[None,None]:
     logger = logging.getLogger(__name__)
 
     infd = input_file.fileno()
@@ -625,7 +627,7 @@ def parse_scaling_list(buf:bytes, bit_position: int, size) -> tuple[int,list[int
 # The ISO/IEC H.264-201602 seems to take into account the case where the end of the deltas list
 #  is full of zeroes.
 @typechecked
-def write_scaling_list(buf:bytes, bit_position: int, size, matrix,
+def write_scaling_list(buf:bytes, bit_position: int, size, matrix:list[int],
                        optimized: bool = False) -> int:
     logger = logging.getLogger(__name__)
     logger.debug('Dumping matrix: %s of size: %d, size parameter: %d.', matrix, len(matrix), size)
@@ -1713,7 +1715,7 @@ def parse_mkv_tree(mkvinfo_path:str, input_file: IO[bytes]) -> dict[str,tuple[in
 # value 0 to 2^56-2
 
 @typechecked
-def get_ebml_length(length) -> bytes|None:
+def get_ebml_length(length:int) -> bytes|None:
     logger = logging.getLogger(__name__)
 
     if 0 <= length <= 2**7-2:
@@ -1762,7 +1764,7 @@ def dump_codec_private_data(avc_decoder_configuration: AVCDecoderConfiguration)
     return res
 
 @typechecked
-def change_ebml_element_size(input_file: IO[bytes], position:int, addendum) -> int:
+def change_ebml_element_size(input_file: IO[bytes], position:int, addendum:int) -> int:
     logger = logging.getLogger(__name__)
 
     initial_position = position
@@ -1855,7 +1857,7 @@ def change_ebml_element_size(input_file: IO[bytes], position:int, addendum) -> i
     return delta
 
 @typechecked
-def change_codec_private_data(mkvinfo_path:str, input_file: IO[bytes], codec_data) -> None:
+def change_codec_private_data(mkvinfo_path:str, input_file: IO[bytes], codec_data:bytes) -> None:
     logger = logging.getLogger(__name__)
 
     infd = input_file.fileno()
@@ -2268,8 +2270,8 @@ def get_frames_in_stream(ffprobe_path: str, input_file: IO[bytes], begin:timedel
 
 # TODO: Finish implementation of this function and use it.
 @typechecked
-def get_nearest_idr_frame(ffprobe_path: str, input_file: IO[bytes], timestamp, before: bool=True,
+def get_nearest_idr_frame(ffprobe_path: str, input_file: IO[bytes], timestamp:timedelta,
-                          delta: timedelta=timedelta(seconds=2)):
+                          before: bool=True, delta: timedelta=timedelta(seconds=2)):
     # pylint: disable=W0613
     logger = logging.getLogger(__name__)
 
@@ -2438,7 +2440,7 @@ def extract_mkv_part(mkvmerge_path:str, input_file:IO[bytes], output_file:IO[byt
 
 @typechecked
 def extract_pictures(ffmpeg_path:str, input_file:IO[bytes], begin:timedelta, nb_frames:int,
-                     width:int=640, height:int=480) -> tuple[bytes,int]:
+                     width:int=640, height:int=480) -> tuple[bytes,int]|tuple[None,None]:
     logger = logging.getLogger(__name__)
 
     infd = input_file.fileno()
@@ -2477,7 +2479,8 @@ def extract_pictures(ffmpeg_path:str, input_file:IO[bytes], begin:timedelta, nb_
 @typechecked
 def extract_sound(ffmpeg_path:str, input_file: IO[bytes], begin:timedelta, output_filename:str,
                   packet_duration:int, sub_channel:int=0,
-                  nb_packets:int=0, sample_rate:int=48000, nb_channels:int=2) -> tuple[bytes,int]:
+                  nb_packets:int=0, sample_rate:int=48000, 
+                  nb_channels:int=2) -> tuple[bytes,int]|tuple[None,None]:
     logger = logging.getLogger(__name__)
 
     outfd = memfd_create(output_filename, flags=0)
@@ -2512,7 +2515,7 @@ def extract_sound(ffmpeg_path:str, input_file: IO[bytes], begin:timedelta, outpu
         return sound, outfd
 
 @typechecked
-def dump_ppm(pictures: list, prefix: str, temporaries: list[IO[bytes]]) -> None:
+def dump_ppm(pictures: bytes, prefix: str, temporaries: list[IO[bytes]]) -> None:
     logger = logging.getLogger(__name__)
 
     # "P6\nWIDTH HEIGHT\n255\n"
@@ -2546,7 +2549,7 @@ def dump_ppm(pictures: list, prefix: str, temporaries: list[IO[bytes]]) -> None:
 
         header_len=2+1+ceil(log(width, 10))+1+ceil(log(height, 10))+1+3+1
         try:
-            with open(filename, 'wb', encoding='utf8') as out:
+            with open(filename, 'wb') as out:
                 temporaries.append(out)
                 outfd = out.fileno()
                 length=header_len+3*width*height
@@ -2686,7 +2689,7 @@ def extract_all_streams(ffmpeg_path:str, ffprobe_path:str, input_file:IO[bytes],
 
                 if dump_mem_fd:
                     try:
-                        with open(tmpname,'wb', encoding='utf8') as output:
+                        with open(tmpname,'wb') as output:
                             temporaries.append(output)
                             outfd = output.fileno()
                             pos = 0
@@ -2804,7 +2807,7 @@ def extract_all_streams(ffmpeg_path:str, ffprobe_path:str, input_file:IO[bytes],
 # Merge a list of mkv files passed as input, and produce a new MKV as output
 @typechecked
 def merge_mkvs(mkvmerge_path:str, inputs: list[IO[bytes]], output_name:str,
-               concatenate: bool=True, timestamps: dict[int, IO[str]]={}) -> IO[bytes]:
+               concatenate: bool=True, timestamps: dict[int, IO[str]]={}) -> IO[bytes]|None:
     logger = logging.getLogger(__name__)
 
     fds = []