feat(video2x): updated the variables in the Video2X class for compati…

…bility with the GUI

Signed-off-by: k4yt3x <i@k4yt3x.com>

video2x/video2x.py

@@ -39,7 +39,7 @@
 from enum import Enum
 from multiprocessing import Manager, Pool, Queue, Value
 from pathlib import Path
-from typing import Any
+from typing import Any, Callable, Optional
 
 import ffmpeg
 from cv2 import cv2
@@ -106,8 +106,9 @@ class Video2X:
         - interpolate: perform motion interpolation on a file
     """
 
-    def __init__(self) -> None:
+    def __init__(self, progress_callback: Optional[Callable] = None) -> None:
         self.version = __version__
+        self.progress_callback = progress_callback
 
     @staticmethod
     def _get_video_info(path: Path) -> tuple:
@@ -229,7 +230,7 @@ def _run(
         processor_pool = Pool(processes, processor.process)
 
         # create progress bar
-        progress = Progress(
+        self.progress = Progress(
             "[progress.description]{task.description}",
             BarColumn(complete_style="blue", finished_style="green"),
             "[progress.percentage]{task.percentage:>3.0f}%",
@@ -242,25 +243,27 @@ def _run(
             speed_estimate_period=300.0,
             disable=True,
         )
-        task = progress.add_task(f"[cyan]{mode.value['label']}", total=total_frames)
+        task = self.progress.add_task(
+            f"[cyan]{mode.value['label']}", total=total_frames
+        )
 
         def _toggle_pause(_signal_number: int = -1, _frame=None):
             # allow the closure to modify external immutable flag
             nonlocal pause_flag
 
             # print console messages and update the progress bar's status
             if pause_flag.value is False:
-                progress.update(
+                self.progress.update(
                     task, description=f"[cyan]{mode.value['label']} (paused)"
                 )
-                progress.stop_task(task)
+                self.progress.stop_task(task)
                 logger.warning("Processing paused, press Ctrl+Alt+V again to resume")
 
             # the lock is already acquired
             elif pause_flag.value is True:
-                progress.update(task, description=f"[cyan]{mode.value['label']}")
+                self.progress.update(task, description=f"[cyan]{mode.value['label']}")
                 logger.warning("Resuming processing")
-                progress.start_task(task)
+                self.progress.start_task(task)
 
             # invert the flag
             with pause_flag.get_lock():
@@ -292,7 +295,7 @@ def _toggle_pause(_signal_number: int = -1, _frame=None):
 
         try:
             # let the context manager automatically stop the progress bar
-            with progress:
+            with self.progress:
                 frame_index = 0
                 while frame_index < total_frames:
                     current_frame = processed_frames.get(frame_index)
@@ -304,8 +307,8 @@ def _toggle_pause(_signal_number: int = -1, _frame=None):
                     # show the progress bar after the processing starts
                     # reduces speed estimation inaccuracies and print overlaps
                     if frame_index == 0:
-                        progress.disable = False
-                        progress.start()
+                        self.progress.disable = False
+                        self.progress.start()
 
                     if current_frame is True:
                         encoder.write(processed_frames.get(frame_index - 1))
@@ -316,7 +319,9 @@ def _toggle_pause(_signal_number: int = -1, _frame=None):
                         if frame_index > 0:
                             del processed_frames[frame_index - 1]
 
-                    progress.update(task, completed=frame_index + 1)
+                    self.progress.update(task, completed=frame_index + 1)
+                    if self.progress_callback is not None:
+                        self.progress_callback(frame_index + 1, total_frames)
                     frame_index += 1
 
         # if SIGTERM is received or ^C is pressed
@@ -389,10 +394,10 @@ def upscale(
         width, height, total_frames, frame_rate = self._get_video_info(input_path)
 
         # automatically calculate output width and height if only one is given
-        if output_width == 0 or output_width is None:
+        if output_width == 0:
             output_width = output_height / height * width
 
-        elif output_height == 0 or output_height is None:
+        elif output_height == 0:
             output_height = output_width / width * height
 
         # sanitize output width and height to be divisible by 2