v1.1.1

CHANGELOG.md

@@ -1,3 +1,7 @@
+# v1.1.1
+- Fixed adding wrong file in queue for EPUB and PDF files, ensuring the correct file is added to the queue.
+- Reformatted the code using Black.
+
 # v1.1.0
 - Added queue system for processing multiple items, allowing users to add multiple files and process them in a queue, mentioned by @jborza in #30 (Special thanks to @jborza for implementing this feature in PR #35)
 - Added a feature that allows selecting multiple items in book handler (in right click menu) by @jborza in #31, that fixes #28

abogen/VERSION

@@ -1 +1 @@
-1.1.0
+1.1.1

abogen/book_handler.py

@@ -997,10 +997,21 @@ class HandlerDialog(QDialog):
                     bookmark_item.setData(0, Qt.UserRole, page_id)
                     # only allow checking if this chapter has content
                     if self.content_lengths.get(page_id, 0) > 0:
-                        bookmark_item.setFlags(bookmark_item.flags() | Qt.ItemIsUserCheckable)
-                        bookmark_item.setCheckState(0, Qt.Checked if page_id in self.checked_chapters else Qt.Unchecked)
+                        bookmark_item.setFlags(
+                            bookmark_item.flags() | Qt.ItemIsUserCheckable
+                        )
+                        bookmark_item.setCheckState(
+                            0,
+                            (
+                                Qt.Checked
+                                if page_id in self.checked_chapters
+                                else Qt.Unchecked
+                            ),
+                        )
                     else:
-                        bookmark_item.setFlags(bookmark_item.flags() & ~Qt.ItemIsUserCheckable)
+                        bookmark_item.setFlags(
+                            bookmark_item.flags() & ~Qt.ItemIsUserCheckable
+                        )
                     # map for uncategorized pages
                     self.bookmark_items_map[page_num] = bookmark_item
 
@@ -1027,10 +1038,21 @@ class HandlerDialog(QDialog):
                         page_item.setData(0, Qt.UserRole, page_id)
                         # only allow checking if this sub-page has content
                         if self.content_lengths.get(page_id, 0) > 0:
-                            page_item.setFlags(page_item.flags() | Qt.ItemIsUserCheckable)
-                            page_item.setCheckState(0, Qt.Checked if page_id in self.checked_chapters else Qt.Unchecked)
+                            page_item.setFlags(
+                                page_item.flags() | Qt.ItemIsUserCheckable
+                            )
+                            page_item.setCheckState(
+                                0,
+                                (
+                                    Qt.Checked
+                                    if page_id in self.checked_chapters
+                                    else Qt.Unchecked
+                                ),
+                            )
                         else:
-                            page_item.setFlags(page_item.flags() & ~Qt.ItemIsUserCheckable)
+                            page_item.setFlags(
+                                page_item.flags() & ~Qt.ItemIsUserCheckable
+                            )
 
                         added_pages.add(sub_page_num)
 
@@ -1038,11 +1060,15 @@ class HandlerDialog(QDialog):
 
         covered_pages = set(added_pages)
         # attach any pages without direct bookmarks under nearest preceding chapter
-        uncategorized_pages = [i for i in range(len(self.pdf_doc)) if i not in covered_pages]
+        uncategorized_pages = [
+            i for i in range(len(self.pdf_doc)) if i not in covered_pages
+        ]
         for page_num in uncategorized_pages:
             # find nearest previous bookmark
             prev_nums = [n for n in sorted(self.bookmark_items_map) if n < page_num]
-            parent_item = self.bookmark_items_map[prev_nums[-1]] if prev_nums else self.treeWidget
+            parent_item = (
+                self.bookmark_items_map[prev_nums[-1]] if prev_nums else self.treeWidget
+            )
             page_id = f"page_{page_num+1}"
             title = f"Page {page_num+1}"
             text = self.content_texts.get(page_id, "").strip()
@@ -1055,7 +1081,9 @@ class HandlerDialog(QDialog):
             # only allow checking if uncategorized page has content
             if self.content_lengths.get(page_id, 0) > 0:
                 page_item.setFlags(page_item.flags() | Qt.ItemIsUserCheckable)
-                page_item.setCheckState(0, Qt.Checked if page_id in self.checked_chapters else Qt.Unchecked)
+                page_item.setCheckState(
+                    0, Qt.Checked if page_id in self.checked_chapters else Qt.Unchecked
+                )
             else:
                 page_item.setFlags(page_item.flags() & ~Qt.ItemIsUserCheckable)
 
@@ -1081,7 +1109,9 @@ class HandlerDialog(QDialog):
             # only allow checking if standalone page has content
             if self.content_lengths.get(page_id, 0) > 0:
                 page_item.setFlags(page_item.flags() | Qt.ItemIsUserCheckable)
-                page_item.setCheckState(0, Qt.Checked if page_id in self.checked_chapters else Qt.Unchecked)
+                page_item.setCheckState(
+                    0, Qt.Checked if page_id in self.checked_chapters else Qt.Unchecked
+                )
             else:
                 page_item.setFlags(page_item.flags() & ~Qt.ItemIsUserCheckable)
 
@@ -1501,7 +1531,9 @@ class HandlerDialog(QDialog):
             authors_text = ", ".join(self.book_metadata["authors"])
             html_content += f"<p style='text-align: center; font-style: italic;'>By {authors_text}</p>"
 
-        if self.book_metadata["publisher"] or self.book_metadata.get("publication_year"):
+        if self.book_metadata["publisher"] or self.book_metadata.get(
+            "publication_year"
+        ):
             pub_info = []
             if self.book_metadata["publisher"]:
                 pub_info.append(f"Published by {self.book_metadata['publisher']}")
@@ -1543,7 +1575,9 @@ class HandlerDialog(QDialog):
             try:
                 author_items = self.book.get_metadata("DC", "creator")
                 if author_items:
-                    metadata["authors"] = [author[0] for author in author_items if len(author) > 0]
+                    metadata["authors"] = [
+                        author[0] for author in author_items if len(author) > 0
+                    ]
             except Exception as e:
                 logging.warning(f"Error extracting author metadata: {e}")
 
@@ -1567,7 +1601,7 @@ class HandlerDialog(QDialog):
                 if date_items and len(date_items) > 0:
                     date_str = date_items[0][0]
                     # Try to extract just the year from the date string
-                    year_match = re.search(r'\b(19|20)\d{2}\b', date_str)
+                    year_match = re.search(r"\b(19|20)\d{2}\b", date_str)
                     if year_match:
                         metadata["publication_year"] = year_match.group(0)
                     else:
@@ -1607,12 +1641,12 @@ class HandlerDialog(QDialog):
                 # Try to extract publication date from PDF metadata
                 if "creationDate" in pdf_info:
                     date_str = pdf_info["creationDate"]
-                    year_match = re.search(r'D:(\d{4})', date_str)
+                    year_match = re.search(r"D:(\d{4})", date_str)
                     if year_match:
                         metadata["publication_year"] = year_match.group(1)
                 elif "modDate" in pdf_info:
                     date_str = pdf_info["modDate"]
-                    year_match = re.search(r'D:(\d{4})', date_str)
+                    year_match = re.search(r"D:(\d{4})", date_str)
                     if year_match:
                         metadata["publication_year"] = year_match.group(1)
 
@@ -1644,11 +1678,15 @@ class HandlerDialog(QDialog):
         authors = metadata.get("authors") or ["Unknown"]
         authors_text = ", ".join(authors)
         album_artist = authors_text or "Unknown"
-        year = metadata.get("publication_year") or current_year  # Use publication year if available
+        year = (
+            metadata.get("publication_year") or current_year
+        )  # Use publication year if available
 
         # Count chapters/pages
         total_chapters = len(self.checked_chapters)
-        chapter_text = f"{total_chapters} {'Chapters' if self.file_type == 'epub' else 'Pages'}"
+        chapter_text = (
+            f"{total_chapters} {'Chapters' if self.file_type == 'epub' else 'Pages'}"
+        )
 
         # Format metadata tags
         metadata_tags = [
@@ -1658,7 +1696,7 @@ class HandlerDialog(QDialog):
             f"<<METADATA_YEAR:{year}>>",
             f"<<METADATA_ALBUM_ARTIST:{album_artist}>>",
             f"<<METADATA_COMPOSER:Narrator>>",
-            f"<<METADATA_GENRE:Audiobook>>"
+            f"<<METADATA_GENRE:Audiobook>>",
         ]
 
         return "\n".join(metadata_tags)
@@ -1730,7 +1768,10 @@ class HandlerDialog(QDialog):
                     if text:
                         all_content.append(text)
                         included_text_ids.add(page_id)
-            return metadata_tags + "\n\n" + "\n\n".join(all_content), all_checked_identifiers
+            return (
+                metadata_tags + "\n\n" + "\n\n".join(all_content),
+                all_checked_identifiers,
+            )
 
         iterator = QTreeWidgetItemIterator(self.treeWidget)
         while iterator.value():
@@ -1788,7 +1829,10 @@ class HandlerDialog(QDialog):
                         included_text_ids.add(identifier)
             iterator += 1
 
-        return metadata_tags + "\n\n" + "\n\n".join([t[1] for t in section_titles]), all_checked_identifiers
+        return (
+            metadata_tags + "\n\n" + "\n\n".join([t[1] for t in section_titles]),
+            all_checked_identifiers,
+        )
 
     def on_save_chapters_changed(self, state):
         self.save_chapters_separately = bool(state)

abogen/conversion.py

@@ -10,13 +10,20 @@ from PyQt5.QtCore import QThread, pyqtSignal, Qt, QTimer
 from PyQt5.QtWidgets import QCheckBox, QVBoxLayout, QDialog, QLabel, QDialogButtonBox
 import soundfile as sf
 from abogen.utils import clean_text, create_process
-from abogen.constants import PROGRAM_NAME, LANGUAGE_DESCRIPTIONS, SAMPLE_VOICE_TEXTS, COLORS, CHAPTER_OPTIONS_COUNTDOWN
+from abogen.constants import (
+    PROGRAM_NAME,
+    LANGUAGE_DESCRIPTIONS,
+    SAMPLE_VOICE_TEXTS,
+    COLORS,
+    CHAPTER_OPTIONS_COUNTDOWN,
+)
 from abogen.voice_formulas import get_new_voice
 import abogen.hf_tracker as hf_tracker
 import static_ffmpeg
 import threading  # for efficient waiting
 import subprocess
 
+
 def get_sample_voice_text(lang_code):
     return SAMPLE_VOICE_TEXTS.get(lang_code, SAMPLE_VOICE_TEXTS["a"])
 
@@ -73,7 +80,9 @@ class ChapterOptionsDialog(QDialog):
 
         # Countdown label
         self.countdown_seconds = CHAPTER_OPTIONS_COUNTDOWN
-        self.countdown_label = QLabel(f"Auto-accepting in {self.countdown_seconds} seconds...")
+        self.countdown_label = QLabel(
+            f"Auto-accepting in {self.countdown_seconds} seconds..."
+        )
         self.countdown_label.setStyleSheet(f"color: {COLORS['GREEN']};")
         layout.addWidget(self.countdown_label)
 
@@ -96,7 +105,9 @@ class ChapterOptionsDialog(QDialog):
     def _on_timer_tick(self):
         self.countdown_seconds -= 1
         if self.countdown_seconds > 0:
-            self.countdown_label.setText(f"Auto-accepting in {self.countdown_seconds} seconds...")
+            self.countdown_label.setText(
+                f"Auto-accepting in {self.countdown_seconds} seconds..."
+            )
         else:
             self._timer.stop()
             self._button_box.accepted.emit()  # Simulate OK click
@@ -152,7 +163,7 @@ class ConversionThread(QThread):
         start_time,
         total_char_count,
         use_gpu=True,
-        from_queue=False
+        from_queue=False,
     ):  # Add use_gpu parameter
         super().__init__()
         self._chapter_options_event = threading.Event()
@@ -182,7 +193,9 @@ class ConversionThread(QThread):
         self.use_gpu = use_gpu  # Store the GPU setting
         self.max_subtitle_words = 50  # Default value, will be overridden from GUI
 
-    def _stream_audio_in_chunks(self, segments, process_func, progress_prefix="Processing"):
+    def _stream_audio_in_chunks(
+        self, segments, process_func, progress_prefix="Processing"
+    ):
         """
         Process audio segments in memory-efficient chunks
 
@@ -204,16 +217,18 @@ class ConversionThread(QThread):
         for i, segment in enumerate(segments):
             try:
                 # Handle both NumPy arrays and PyTorch tensors
-                if hasattr(segment, 'astype'):
+                if hasattr(segment, "astype"):
                     segment_bytes = segment.astype("float32").tobytes()
                 else:
                     segment_bytes = segment.cpu().numpy().astype("float32").tobytes()
-                is_last = (i == len(segments) - 1)
+                is_last = i == len(segments) - 1
 
                 # Update progress periodically - skip if there's only one segment
                 if (i % 20 == 0 or is_last) and len(segments) > 1:
                     progress_percent = int((samples_processed / total_samples) * 100)
-                    self.log_updated.emit(f"{progress_prefix} segment {i+1}/{len(segments)} ({progress_percent}% complete)")
+                    self.log_updated.emit(
+                        f"{progress_prefix} segment {i+1}/{len(segments)} ({progress_percent}% complete)"
+                    )
 
                 # Process this segment
                 process_func(segment_bytes, is_last)
@@ -229,7 +244,14 @@ class ConversionThread(QThread):
 
         return samples_processed
 
-    def _process_audio_segments(self, audio_segments, output_path, output_format, use_ffmpeg=False, ffmpeg_args=None):
+    def _process_audio_segments(
+        self,
+        audio_segments,
+        output_path,
+        output_format,
+        use_ffmpeg=False,
+        ffmpeg_args=None,
+    ):
         """
         Process audio segments to a target format with memory-efficient handling
 
@@ -254,7 +276,7 @@ class ConversionThread(QThread):
 
                 # Append remaining segments
                 for i, segment in enumerate(audio_segments[1:], 1):
-                    with sf.SoundFile(output_path, mode='r+') as f:
+                    with sf.SoundFile(output_path, mode="r+") as f:
                         f.seek(0, sf.SEEK_END)
                         f.write(segment)
                 return True, output_path
@@ -268,12 +290,18 @@ class ConversionThread(QThread):
 
             # Basic FFmpeg command
             cmd = [
-                "ffmpeg", "-y",
-                "-thread_queue_size", "32768",
-                "-f", "f32le",
-                "-ar", "24000",
-                "-ac", "1",
-                "-i", "pipe:0"
+                "ffmpeg",
+                "-y",
+                "-thread_queue_size",
+                "32768",
+                "-f",
+                "f32le",
+                "-ar",
+                "24000",
+                "-ac",
+                "1",
+                "-i",
+                "pipe:0",
             ]
 
             # Add custom FFmpeg arguments if provided
@@ -302,19 +330,29 @@ class ConversionThread(QThread):
                 def process_chunk(chunk_bytes, is_last):
                     proc.stdin.write(chunk_bytes)
 
-                self._stream_audio_in_chunks(audio_segments, process_chunk, 
-                                          progress_prefix=f"Processing {output_format.upper()}")
+                self._stream_audio_in_chunks(
+                    audio_segments,
+                    process_chunk,
+                    progress_prefix=f"Processing {output_format.upper()}",
+                )
 
                 # Close stdin and wait for process to complete
                 proc.stdin.close()
                 if proc.wait() != 0:
-                    self.log_updated.emit((f"{output_format.upper()} conversion failed.", "red"))
+                    self.log_updated.emit(
+                        (f"{output_format.upper()} conversion failed.", "red")
+                    )
                     return False, None
 
                 return True, output_path
 
             except Exception as e:
-                self.log_updated.emit((f"Error during {output_format.upper()} conversion: {str(e)}", "red"))
+                self.log_updated.emit(
+                    (
+                        f"Error during {output_format.upper()} conversion: {str(e)}",
+                        "red",
+                    )
+                )
                 proc.stdin.close()
                 try:
                     proc.terminate()
@@ -325,12 +363,16 @@ class ConversionThread(QThread):
         # For formats supported by soundfile (mp3, flac)
         else:
             try:
-                with sf.SoundFile(output_path, 'w', samplerate=24000, channels=1, format=output_format) as f:
+                with sf.SoundFile(
+                    output_path, "w", samplerate=24000, channels=1, format=output_format
+                ) as f:
                     for i, segment in enumerate(audio_segments):
                         f.write(segment)
                 return True, output_path
             except Exception as e:
-                self.log_updated.emit((f"Error processing {output_format.upper()} file: {str(e)}", "red"))
+                self.log_updated.emit(
+                    (f"Error processing {output_format.upper()} file: {str(e)}", "red")
+                )
                 return False, None
 
     def run(self):
@@ -346,7 +388,9 @@ class ConversionThread(QThread):
             if getattr(self, "from_queue", False):
                 display_file = self.file_name
             else:
-                display_file = self.display_path if self.display_path else self.file_name
+                display_file = (
+                    self.display_path if self.display_path else self.file_name
+                )
 
             self.log_updated.emit(f"- Input File: {display_file}")
 
@@ -363,7 +407,9 @@ class ConversionThread(QThread):
             self.log_updated.emit(f"- Speed: {self.speed}")
             self.log_updated.emit(f"- Subtitle mode: {self.subtitle_mode}")
             self.log_updated.emit(f"- Output format: {self.output_format}")
-            self.log_updated.emit(f"- Subtitle format: {getattr(self, 'subtitle_format', 'srt')}")
+            self.log_updated.emit(
+                f"- Subtitle format: {getattr(self, 'subtitle_format', 'srt')}"
+            )
             self.log_updated.emit(f"- Save option: {self.save_option}")
             if self.replace_single_newlines:
                 self.log_updated.emit(f"- Replace single newlines: Yes")
@@ -382,8 +428,10 @@ class ConversionThread(QThread):
                         f"- Merge chapters at the end: {'Yes' if merge_at_end else 'No'}"
                     )
                     # Display the separate chapters format if it's set
-                    separate_format = getattr(self, 'separate_chapters_format', 'wav')
-                    self.log_updated.emit(f"- Separate chapters format: {separate_format}")
+                    separate_format = getattr(self, "separate_chapters_format", "wav")
+                    self.log_updated.emit(
+                        f"- Separate chapters format: {separate_format}"
+                    )
 
             if self.save_option == "Choose output folder":
                 self.log_updated.emit(
@@ -478,7 +526,6 @@ class ConversionThread(QThread):
             chapters_out_dir = None
             suffix = ""
 
-
             # Use file_name for logs if from_queue, otherwise use display_path if available
             if getattr(self, "from_queue", False):
                 base_path = self.file_name
@@ -701,11 +748,11 @@ class ConversionThread(QThread):
                         # Find last word boundary before limit
                         pos = sanitized[:MAX_LEN].rfind("_")
                         # Use word boundary if found, otherwise use hard limit
-                        sanitized = sanitized[:pos if pos > 0 else MAX_LEN].rstrip("_")
+                        sanitized = sanitized[: pos if pos > 0 else MAX_LEN].rstrip("_")
                     chapter_filename = f"{chapter_idx:02d}_{sanitized}"
 
                     # Use separate_chapters_format
-                    separate_format = getattr(self, 'separate_chapters_format', 'wav')
+                    separate_format = getattr(self, "separate_chapters_format", "wav")
 
                     chapter_out_path = os.path.join(
                         chapters_out_dir, f"{chapter_filename}.{separate_format}"
@@ -713,30 +760,49 @@ class ConversionThread(QThread):
 
                     # Process audio segments using the unified function
                     success, chapter_out_path = self._process_audio_segments(
-                        chapter_audio_segments, chapter_out_path, separate_format, use_ffmpeg=(separate_format in ["opus", "m4b"])
+                        chapter_audio_segments,
+                        chapter_out_path,
+                        separate_format,
+                        use_ffmpeg=(separate_format in ["opus", "m4b"]),
                     )
 
                     if not success:
-                        self.log_updated.emit((f"Failed to write {separate_format.upper()} file.", "red"))
+                        self.log_updated.emit(
+                            (f"Failed to write {separate_format.upper()} file.", "red")
+                        )
                         continue
 
                     # Generate subtitle file for chapter if not Disabled
                     if self.subtitle_mode != "Disabled" and chapter_subtitle_entries:
-                        subtitle_format = getattr(self, 'subtitle_format', 'srt')
-                        file_extension = 'ass' if 'ass' in subtitle_format else 'srt'
+                        subtitle_format = getattr(self, "subtitle_format", "srt")
+                        file_extension = "ass" if "ass" in subtitle_format else "srt"
                         chapter_subtitle_path = os.path.join(
                             chapters_out_dir, f"{chapter_filename}.{file_extension}"
                         )
 
-                        if 'ass' in subtitle_format:
+                        if "ass" in subtitle_format:
                             # Generate ASS subtitle
-                            is_centered = subtitle_format in ("ass_centered_wide", "ass_centered_narrow")
-                            is_narrow = subtitle_format in ("ass_narrow", "ass_centered_narrow")
-                            self._write_ass_subtitle(chapter_subtitle_path, chapter_subtitle_entries, is_centered, is_narrow)
+                            is_centered = subtitle_format in (
+                                "ass_centered_wide",
+                                "ass_centered_narrow",
+                            )
+                            is_narrow = subtitle_format in (
+                                "ass_narrow",
+                                "ass_centered_narrow",
+                            )
+                            self._write_ass_subtitle(
+                                chapter_subtitle_path,
+                                chapter_subtitle_entries,
+                                is_centered,
+                                is_narrow,
+                            )
                         else:
                             # Generate SRT subtitle (default)
                             with open(
-                                chapter_subtitle_path, "w", encoding="utf-8", errors="replace"
+                                chapter_subtitle_path,
+                                "w",
+                                encoding="utf-8",
+                                errors="replace",
                             ) as srt_file:
                                 for i, (start, end, text) in enumerate(
                                     chapter_subtitle_entries, 1
@@ -788,9 +854,10 @@ class ConversionThread(QThread):
                 else:
                     # Process audio segments using the unified function
                     success, final_out_path = self._process_audio_segments(
-                        audio_segments, f"{base_filepath_no_ext}.{intended_output_format}", 
+                        audio_segments,
+                        f"{base_filepath_no_ext}.{intended_output_format}",
                         intended_output_format,
-                        use_ffmpeg=(intended_output_format in ["opus", "m4b"])
+                        use_ffmpeg=(intended_output_format in ["opus", "m4b"]),
                     )
 
                     if not success:
@@ -798,25 +865,41 @@ class ConversionThread(QThread):
 
                 if not final_out_path:
                     self.log_updated.emit(("Audio generation failed.", "red"))
-                    self.conversion_finished.emit(("Audio generation failed.", "red"), None)
+                    self.conversion_finished.emit(
+                        ("Audio generation failed.", "red"), None
+                    )
                     return
 
                 # Subtitle and final message logic
                 if final_out_path:
                     if self.subtitle_mode != "Disabled":
-                        subtitle_format = getattr(self, 'subtitle_format', 'srt')
-                        file_extension = 'ass' if 'ass' in subtitle_format else 'srt'
-                        subtitle_path = os.path.splitext(final_out_path)[0] + f".{file_extension}"
+                        subtitle_format = getattr(self, "subtitle_format", "srt")
+                        file_extension = "ass" if "ass" in subtitle_format else "srt"
+                        subtitle_path = (
+                            os.path.splitext(final_out_path)[0] + f".{file_extension}"
+                        )
 
-                        if 'ass' in subtitle_format:
+                        if "ass" in subtitle_format:
                             # Generate ASS subtitle
-                            is_centered = subtitle_format in ("ass_centered_wide", "ass_centered_narrow")
-                            is_narrow = subtitle_format in ("ass_narrow", "ass_centered_narrow")
-                            self._write_ass_subtitle(subtitle_path, subtitle_entries, is_centered, is_narrow)
+                            is_centered = subtitle_format in (
+                                "ass_centered_wide",
+                                "ass_centered_narrow",
+                            )
+                            is_narrow = subtitle_format in (
+                                "ass_narrow",
+                                "ass_centered_narrow",
+                            )
+                            self._write_ass_subtitle(
+                                subtitle_path, subtitle_entries, is_centered, is_narrow
+                            )
                         else:
                             # Generate SRT subtitle (default)
-                            with open(subtitle_path, "w", encoding="utf-8", errors="replace") as srt_file:
-                                for i, (start, end, text) in enumerate(subtitle_entries, 1):
+                            with open(
+                                subtitle_path, "w", encoding="utf-8", errors="replace"
+                            ) as srt_file:
+                                for i, (start, end, text) in enumerate(
+                                    subtitle_entries, 1
+                                ):
                                     srt_file.write(
                                         f"{i}\n{self._srt_time(start)} --> {self._srt_time(end)}\n{text}\n\n"
                                     )
@@ -829,11 +912,16 @@ class ConversionThread(QThread):
                         )
                     else:
                         self.conversion_finished.emit(
-                            (f"\nAudiobook saved to: {final_out_path}", "green"), final_out_path
+                            (f"\nAudiobook saved to: {final_out_path}", "green"),
+                            final_out_path,
                         )
                 else:
-                    self.log_updated.emit(("Audio generation failed (final_out_path was not set).", "red"))
-                    self.conversion_finished.emit(("Audio generation failed.", "red"), None)
+                    self.log_updated.emit(
+                        ("Audio generation failed (final_out_path was not set).", "red")
+                    )
+                    self.conversion_finished.emit(
+                        ("Audio generation failed.", "red"), None
+                    )
             elif audio_segments and not merge_chapters:
                 self.conversion_finished.emit(
                     (
@@ -856,7 +944,9 @@ class ConversionThread(QThread):
         self.waiting_for_user_input = False
         self._chapter_options_event.set()
 
-    def _generate_m4b_with_chapters(self, audio_segments, chapters_time, base_filepath_no_ext):
+    def _generate_m4b_with_chapters(
+        self, audio_segments, chapters_time, base_filepath_no_ext
+    ):
         """Generate M4B file with chapters from audio segments"""
         final_wav_path = f"{base_filepath_no_ext}.wav"
         output_m4b_path = f"{base_filepath_no_ext}.m4b"
@@ -877,7 +967,9 @@ class ConversionThread(QThread):
             if success:
                 return wav_path
             else:
-                self.log_updated.emit((f"\nFailed to save single/no chapter audio as WAV", "red"))
+                self.log_updated.emit(
+                    (f"\nFailed to save single/no chapter audio as WAV", "red")
+                )
                 return None
 
         try:
@@ -885,7 +977,7 @@ class ConversionThread(QThread):
             with open(chapters_info_path, "w", encoding="utf-8") as f:
                 f.write(";FFMETADATA1\n")
                 for chapter in chapters_time:
-                    chapter_title = chapter['chapter'].replace('=', '\\=')
+                    chapter_title = chapter["chapter"].replace("=", "\\=")
                     f.write(f"[CHAPTER]\n")
                     f.write(f"TIMEBASE=1/1000\n")
                     f.write(f"START={int(chapter['start']*1000)}\n")
@@ -898,19 +990,30 @@ class ConversionThread(QThread):
 
             # Use pipe-based approach for audio input with special args for M4B chapters
             ffmpeg_args = [
-                "-i", chapters_info_path,
-                "-map", "0:a",
-                "-map_metadata", "1", 
-                "-map_chapters", "1",
+                "-i",
+                chapters_info_path,
+                "-map",
+                "0:a",
+                "-map_metadata",
+                "1",
+                "-map_chapters",
+                "1",
                 *metadata_options,
-                "-c:a", "aac",
-                "-q:a", "2", # Quality-based VBR for better quality control
-                "-movflags", "+faststart+use_metadata_tags",  # Added for better compatibility
+                "-c:a",
+                "aac",
+                "-q:a",
+                "2",  # Quality-based VBR for better quality control
+                "-movflags",
+                "+faststart+use_metadata_tags",  # Added for better compatibility
             ]
 
             # Use the established unified method with M4B-specific args
             success, out_path = self._process_audio_segments(
-                audio_segments, output_m4b_path, "m4b", use_ffmpeg=True, ffmpeg_args=ffmpeg_args
+                audio_segments,
+                output_m4b_path,
+                "m4b",
+                use_ffmpeg=True,
+                ffmpeg_args=ffmpeg_args,
             )
 
             # Clean up the temporary chapter metadata file
@@ -918,13 +1021,17 @@ class ConversionThread(QThread):
                 try:
                     os.remove(chapters_info_path)
                 except Exception as e:
-                    self.log_updated.emit((f"Warning: Could not delete chapters file: {e}", "orange"))
+                    self.log_updated.emit(
+                        (f"Warning: Could not delete chapters file: {e}", "orange")
+                    )
 
             if success:
                 return out_path
 
             # If M4B generation failed, fallback to WAV
-            self.log_updated.emit((f"M4B conversion failed. Falling back to WAV.\n", "red"))
+            self.log_updated.emit(
+                (f"M4B conversion failed. Falling back to WAV.\n", "red")
+            )
             success, wav_path = self._process_audio_segments(
                 audio_segments, final_wav_path, "wav", use_ffmpeg=False
             )
@@ -936,7 +1043,12 @@ class ConversionThread(QThread):
 
         except Exception as e:
             # General error during M4B generation - create WAV file directly as final output
-            self.log_updated.emit((f"Error during M4B generation: {str(e)}.\n\nFalling back to WAV.\n", "red"))
+            self.log_updated.emit(
+                (
+                    f"Error during M4B generation: {str(e)}.\n\nFalling back to WAV.\n",
+                    "red",
+                )
+            )
 
             # Use the established unified method to create a WAV file as fallback
             success, wav_path = self._process_audio_segments(
@@ -953,7 +1065,9 @@ class ConversionThread(QThread):
             if success:
                 return wav_path
             else:
-                self.log_updated.emit((f"Critical error: Failed to save WAV fallback", "red"))
+                self.log_updated.emit(
+                    (f"Critical error: Failed to save WAV fallback", "red")
+                )
                 return None
 
     def _extract_and_add_metadata_tags_to_ffmpeg_cmd(self):
@@ -967,10 +1081,14 @@ class ConversionThread(QThread):
         else:
             try:
                 encoding = detect_encoding(self.file_name)
-                with open(self.file_name, "r", encoding=encoding, errors="replace") as file:
+                with open(
+                    self.file_name, "r", encoding=encoding, errors="replace"
+                ) as file:
                     text = file.read()
             except Exception as e:
-                self.log_updated.emit(f"Warning: Could not read file for metadata extraction: {e}")
+                self.log_updated.emit(
+                    f"Warning: Could not read file for metadata extraction: {e}"
+                )
                 return []
 
         # Extract metadata tags using regex
@@ -988,7 +1106,11 @@ class ConversionThread(QThread):
         if getattr(self, "from_queue", False):
             filename = os.path.splitext(os.path.basename(self.file_name))[0]
         else:
-            filename = os.path.splitext(os.path.basename(self.display_path if self.display_path else self.file_name))[0]
+            filename = os.path.splitext(
+                os.path.basename(
+                    self.display_path if self.display_path else self.file_name
+                )
+            )[0]
 
         if title_match:
             metadata_options.extend(["-metadata", f"title={title_match.group(1)}"])
@@ -1013,18 +1135,23 @@ class ConversionThread(QThread):
         else:
             # Use current year if year is not specified
             import datetime
+
             current_year = datetime.datetime.now().year
             metadata_options.extend(["-metadata", f"date={current_year}"])
 
         # Add album artist metadata
         if album_artist_match:
-            metadata_options.extend(["-metadata", f"album_artist={album_artist_match.group(1)}"])
+            metadata_options.extend(
+                ["-metadata", f"album_artist={album_artist_match.group(1)}"]
+            )
         else:
             metadata_options.extend(["-metadata", f"album_artist=Unknown"])
 
         # Add composer metadata
         if composer_match:
-            metadata_options.extend(["-metadata", f"composer={composer_match.group(1)}"])
+            metadata_options.extend(
+                ["-metadata", f"composer={composer_match.group(1)}"]
+            )
         else:
             metadata_options.extend(["-metadata", f"composer=Narrator"])
 
@@ -1139,7 +1266,9 @@ class ConversionThread(QThread):
                         (group[0]["start"], group[-1]["end"], text.strip())
                     )
 
-    def _write_ass_subtitle(self, file_path, subtitle_entries, is_centered=False, is_narrow=False):
+    def _write_ass_subtitle(
+        self, file_path, subtitle_entries, is_centered=False, is_narrow=False
+    ):
         with open(file_path, "w", encoding="utf-8", errors="replace") as f:
             # Minimal ASS header
             f.write("[Script Info]\n")
@@ -1148,7 +1277,9 @@ class ConversionThread(QThread):
 
             # Only events section, use override tags for positioning
             f.write("[Events]\n")
-            f.write("Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\n")
+            f.write(
+                "Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text\n"
+            )
 
             # Set margin based on is_narrow parameter
             margin = "90" if is_narrow else ""
@@ -1161,7 +1292,9 @@ class ConversionThread(QThread):
             for i, (start, end, text) in enumerate(subtitle_entries, 1):
                 start_time = self._ass_time(start)
                 end_time = self._ass_time(end)
-                f.write(f"Dialogue: 0,{start_time},{end_time},Default,,{margin},{margin},0,,{alignment_tag}{text}\n")
+                f.write(
+                    f"Dialogue: 0,{start_time},{end_time},Default,,{margin},{margin},0,,{alignment_tag}{text}\n"
+                )
 
     def cancel(self):
         self.cancel_requested = True
@@ -1198,7 +1331,9 @@ class VoicePreviewThread(QThread):
         self.use_gpu = use_gpu
 
         # Cache location for preview audio
-        self.cache_dir = os.path.join(tempfile.gettempdir(), PROGRAM_NAME, "preview_cache")
+        self.cache_dir = os.path.join(
+            tempfile.gettempdir(), PROGRAM_NAME, "preview_cache"
+        )
         os.makedirs(self.cache_dir, exist_ok=True)
 
         # Calculate cache path
@@ -1208,7 +1343,9 @@ class VoicePreviewThread(QThread):
         """Generate a unique filename for the voice with its parameters"""
         # For a voice formula, use a hash of the formula
         if "*" in self.voice:
-            voice_id = f"voice_formula_{hashlib.md5(self.voice.encode()).hexdigest()[:8]}"
+            voice_id = (
+                f"voice_formula_{hashlib.md5(self.voice.encode()).hexdigest()[:8]}"
+            )
         else:
             voice_id = self.voice
 
@@ -1282,7 +1419,9 @@ class PlayAudioThread(QThread):
         except Exception as e:
             # Handle initialization errors separately to give better error messages
             if "mixer not initialized" in str(e):
-                self.error.emit("Audio playback error: The audio system was not properly initialized")
+                self.error.emit(
+                    "Audio playback error: The audio system was not properly initialized"
+                )
             else:
                 self.error.emit(f"Audio playback error: {str(e)}")
 
@@ -1292,6 +1431,7 @@ class PlayAudioThread(QThread):
         # Try to stop pygame if it's running, but catch all exceptions
         try:
             import pygame
+
             if pygame.mixer.get_init():
                 if pygame.mixer.music.get_busy():
                     pygame.mixer.music.stop()

abogen/gui.py

@@ -74,7 +74,7 @@ from abogen.constants import (
     LANGUAGE_DESCRIPTIONS,
     VOICES_INTERNAL,
     SUPPORTED_LANGUAGES_FOR_SUBTITLE_GENERATION,
-    COLORS
+    COLORS,
 )
 import threading
 from abogen.voice_formula_gui import VoiceFormulaDialog
@@ -85,6 +85,7 @@ if platform.system() == "Windows":
     import ctypes
     import winreg
 
+
 class DarkTitleBarEventFilter(QObject):
     def __init__(self, is_windows, get_dark_mode_func, set_title_bar_dark_mode_func):
         super().__init__()
@@ -100,6 +101,7 @@ class DarkTitleBarEventFilter(QObject):
                     self.set_title_bar_dark_mode(obj, True)
         return False
 
+
 class ShowWarningSignalEmitter(QObject):  # New class to handle signal emission
     show_warning_signal = pyqtSignal(str, str)
 
@@ -128,10 +130,14 @@ class InputBox(QLabel):
     STYLE_DEFAULT_HOVER = f"background:{COLORS['BLUE_BG_HOVER']}; border-color:{COLORS['BLUE_BORDER_HOVER']};"
 
     STYLE_ACTIVE = f"border:2px dashed {COLORS['GREEN']}; border-radius:5px; padding:20px; background:{COLORS['GREEN_BG']}; min-height:100px;"
-    STYLE_ACTIVE_HOVER = f"background:{COLORS['GREEN_BG_HOVER']}; border-color:{COLORS['GREEN_BORDER']};"
+    STYLE_ACTIVE_HOVER = (
+        f"background:{COLORS['GREEN_BG_HOVER']}; border-color:{COLORS['GREEN_BORDER']};"
+    )
 
     STYLE_ERROR = f"border:2px dashed {COLORS['RED']}; border-radius:5px; padding:20px; background:{COLORS['RED_BG']}; min-height:100px; color:{COLORS['RED']};"
-    STYLE_ERROR_HOVER = f"background:{COLORS['RED_BG_HOVER']}; border-color:{COLORS['RED']};"
+    STYLE_ERROR_HOVER = (
+        f"background:{COLORS['RED_BG_HOVER']}; border-color:{COLORS['RED']};"
+    )
 
     def __init__(self, parent=None):
         super().__init__(parent)
@@ -140,7 +146,9 @@ class InputBox(QLabel):
         self.setText(
             "Drag and drop your file here or click to browse.\n(.txt, .epub, .pdf)"
         )
-        self.setStyleSheet(f"QLabel {{ {self.STYLE_DEFAULT} }} QLabel:hover {{ {self.STYLE_DEFAULT_HOVER} }}")
+        self.setStyleSheet(
+            f"QLabel {{ {self.STYLE_DEFAULT} }} QLabel:hover {{ {self.STYLE_DEFAULT_HOVER} }}"
+        )
         self.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
         self.setCursor(Qt.PointingHandCursor)
 
@@ -172,7 +180,9 @@ class InputBox(QLabel):
         # Add Go to folder button
         self.go_to_folder_btn = QPushButton("Go to folder", self)
         self.go_to_folder_btn.setStyleSheet("QPushButton { padding: 6px 10px; }")
-        self.go_to_folder_btn.setToolTip("Open the folder that contains the converted file")
+        self.go_to_folder_btn.setToolTip(
+            "Open the folder that contains the converted file"
+        )
         self.go_to_folder_btn.clicked.connect(self.on_go_to_folder_clicked)
         self.go_to_folder_btn.hide()
 
@@ -215,7 +225,6 @@ class InputBox(QLabel):
                 return float(match.group(1))
             raise ValueError(f"Invalid size format: {size_str}")
 
-
         # Format numbers with commas
         def format_num(n):
             try:
@@ -265,7 +274,9 @@ class InputBox(QLabel):
         )
         # Set fixed width to force wrapping
         self.setWordWrap(True)
-        self.setStyleSheet(f"QLabel {{ {self.STYLE_ACTIVE} }} QLabel:hover {{ {self.STYLE_ACTIVE_HOVER} }}")
+        self.setStyleSheet(
+            f"QLabel {{ {self.STYLE_ACTIVE} }} QLabel:hover {{ {self.STYLE_ACTIVE_HOVER} }}"
+        )
         self.clear_btn.show()
         is_document = self.window().selected_file_type in ["epub", "pdf"]
         self.chapters_btn.setVisible(is_document)
@@ -278,7 +289,6 @@ class InputBox(QLabel):
             else:  # PDF - always use Pages
                 self.chapters_btn.setText(f"Pages ({chapter_count})")
 
-
         # Hide textbox and show edit only for .txt files
         self.textbox_btn.hide()
         # Show edit button for txt files directly
@@ -296,21 +306,23 @@ class InputBox(QLabel):
         self.go_to_folder_btn.show()
         # Enable add to queue button only when file is accepted (input box is green)
         self.resizeEvent(None)
-        if hasattr(self.window(), 'btn_add_to_queue'):
+        if hasattr(self.window(), "btn_add_to_queue"):
             self.window().btn_add_to_queue.setEnabled(True)
 
         self.chapters_btn.adjustSize()
         # Reset the input_box_cleared_by_queue flag after setting file info
-        if hasattr(self.window(), 'input_box_cleared_by_queue'):
+        if hasattr(self.window(), "input_box_cleared_by_queue"):
             self.window().input_box_cleared_by_queue = False
 
     def set_error(self, message):
         self.setText(message)
-        self.setStyleSheet(f"QLabel {{ {self.STYLE_ERROR} }} QLabel:hover {{ {self.STYLE_ERROR_HOVER} }}")
+        self.setStyleSheet(
+            f"QLabel {{ {self.STYLE_ERROR} }} QLabel:hover {{ {self.STYLE_ERROR_HOVER} }}"
+        )
         # Show textbox button in error state as well
         self.textbox_btn.show()
         # Disable add to queue button on error
-        if hasattr(self.window(), 'btn_add_to_queue'):
+        if hasattr(self.window(), "btn_add_to_queue"):
             self.window().btn_add_to_queue.setEnabled(False)
 
     def clear_input(self):
@@ -321,7 +333,9 @@ class InputBox(QLabel):
         self.setText(
             "Drag and drop your file here or click to browse.\n(.txt, .epub, .pdf)"
         )
-        self.setStyleSheet(f"QLabel {{ {self.STYLE_DEFAULT} }} QLabel:hover {{ {self.STYLE_DEFAULT_HOVER} }}")
+        self.setStyleSheet(
+            f"QLabel {{ {self.STYLE_DEFAULT} }} QLabel:hover {{ {self.STYLE_DEFAULT_HOVER} }}"
+        )
         self.clear_btn.hide()
         self.chapters_btn.hide()
         self.chapters_btn.setText("Chapters")  # Reset text
@@ -330,10 +344,10 @@ class InputBox(QLabel):
         self.edit_btn.hide()
         self.go_to_folder_btn.hide()
         # Disable add to queue button when input is cleared
-        if hasattr(self.window(), 'btn_add_to_queue'):
+        if hasattr(self.window(), "btn_add_to_queue"):
             self.window().btn_add_to_queue.setEnabled(False)
         # Reset the input_box_cleared_by_queue flag after setting file info
-        if hasattr(self.window(), 'input_box_cleared_by_queue'):
+        if hasattr(self.window(), "input_box_cleared_by_queue"):
             self.window().input_box_cleared_by_queue = True
 
     def _human_readable_size(self, size, decimal_places=2):
@@ -352,26 +366,42 @@ class InputBox(QLabel):
             urls = event.mimeData().urls()
             if urls:
                 ext = urls[0].toLocalFile().lower()
-                if ext.endswith(".txt") or ext.endswith(".epub") or ext.endswith(".pdf"):
+                if (
+                    ext.endswith(".txt")
+                    or ext.endswith(".epub")
+                    or ext.endswith(".pdf")
+                ):
                     event.acceptProposedAction()
                     # Set hover style based on current state
                     if self.styleSheet().find(self.STYLE_ACTIVE) != -1:
-                        self.setStyleSheet(f"QLabel {{ {self.STYLE_ACTIVE} }} QLabel:hover {{ {self.STYLE_ACTIVE_HOVER} }} {self.STYLE_ACTIVE_HOVER}")
+                        self.setStyleSheet(
+                            f"QLabel {{ {self.STYLE_ACTIVE} }} QLabel:hover {{ {self.STYLE_ACTIVE_HOVER} }} {self.STYLE_ACTIVE_HOVER}"
+                        )
                     elif self.styleSheet().find(self.STYLE_ERROR) != -1:
-                        self.setStyleSheet(f"QLabel {{ {self.STYLE_ERROR} }} QLabel:hover {{ {self.STYLE_ERROR_HOVER} }} {self.STYLE_ERROR_HOVER}")
+                        self.setStyleSheet(
+                            f"QLabel {{ {self.STYLE_ERROR} }} QLabel:hover {{ {self.STYLE_ERROR_HOVER} }} {self.STYLE_ERROR_HOVER}"
+                        )
                     else:
-                        self.setStyleSheet(f"QLabel {{ {self.STYLE_DEFAULT} }} QLabel:hover {{ {self.STYLE_DEFAULT_HOVER} }} {self.STYLE_DEFAULT_HOVER}")
+                        self.setStyleSheet(
+                            f"QLabel {{ {self.STYLE_DEFAULT} }} QLabel:hover {{ {self.STYLE_DEFAULT_HOVER} }} {self.STYLE_DEFAULT_HOVER}"
+                        )
                     return
         event.ignore()
 
     def dragLeaveEvent(self, event):
         # Restore the style based on current state
         if self.styleSheet().find(self.STYLE_ACTIVE) != -1:
-            self.setStyleSheet(f"QLabel {{ {self.STYLE_ACTIVE} }} QLabel:hover {{ {self.STYLE_ACTIVE_HOVER} }}")
+            self.setStyleSheet(
+                f"QLabel {{ {self.STYLE_ACTIVE} }} QLabel:hover {{ {self.STYLE_ACTIVE_HOVER} }}"
+            )
         elif self.styleSheet().find(self.STYLE_ERROR) != -1:
-            self.setStyleSheet(f"QLabel {{ {self.STYLE_ERROR} }} QLabel:hover {{ {self.STYLE_ERROR_HOVER} }}")
+            self.setStyleSheet(
+                f"QLabel {{ {self.STYLE_ERROR} }} QLabel:hover {{ {self.STYLE_ERROR_HOVER} }}"
+            )
         else:
-            self.setStyleSheet(f"QLabel {{ {self.STYLE_DEFAULT} }} QLabel:hover {{ {self.STYLE_DEFAULT_HOVER} }}")
+            self.setStyleSheet(
+                f"QLabel {{ {self.STYLE_DEFAULT} }} QLabel:hover {{ {self.STYLE_DEFAULT_HOVER} }}"
+            )
         event.accept()
 
     def dropEvent(self, event):
@@ -433,7 +463,11 @@ class InputBox(QLabel):
         # win.selected_file holds the path to the text that is converted.
         file_to_check = win.selected_file
 
-        if file_to_check and os.path.exists(file_to_check) and os.path.isfile(file_to_check):
+        if (
+            file_to_check
+            and os.path.exists(file_to_check)
+            and os.path.isfile(file_to_check)
+        ):
             folder_path = os.path.dirname(file_to_check)
             QDesktopServices.openUrl(QUrl.fromLocalFile(folder_path))
         else:
@@ -582,6 +616,7 @@ class TextboxDialog(QDialog):
         self.update_char_count()
         self.text_edit.setFocus()
 
+
 def migrate_subtitle_format(config):
     """Convert old subtitle_format values to new internal keys."""
     old_to_new = {
@@ -596,6 +631,7 @@ def migrate_subtitle_format(config):
         config["subtitle_format"] = old_to_new[val]
         save_config(config)
 
+
 class abogen(QWidget):
     def __init__(self):
         super().__init__()
@@ -631,7 +667,9 @@ class abogen(QWidget):
             "max_subtitle_words", 50
         )  # Default max words per subtitle
         self.selected_format = self.config.get("selected_format", "wav")
-        self.separate_chapters_format = self.config.get("separate_chapters_format", "wav")  # Format for individual chapter files
+        self.separate_chapters_format = self.config.get(
+            "separate_chapters_format", "wav"
+        )  # Format for individual chapter files
         self.use_gpu = self.config.get(
             "use_gpu", True  # Load GPU setting with default True
         )
@@ -645,7 +683,9 @@ class abogen(QWidget):
 
         # Create warning signal emitter
         self.warning_signal_emitter = ShowWarningSignalEmitter()
-        self.warning_signal_emitter.show_warning_signal.connect(self.show_model_download_warning)
+        self.warning_signal_emitter.show_warning_signal.connect(
+            self.show_model_download_warning
+        )
         hf_tracker.set_show_warning_signal_emitter(self.warning_signal_emitter)
 
         # Set application icon
@@ -793,6 +833,7 @@ class abogen(QWidget):
         self.btn_voice_formula_mixer.setStyleSheet("QPushButton { padding: 6px 12px; }")
         self.btn_voice_formula_mixer.clicked.connect(self.show_voice_formula_dialog)
         voice_layout.addWidget(self.btn_voice_formula_mixer)
+
         # Play/Stop icons
         def make_icon(color, shape):
             pix = QPixmap(20, 20)
@@ -900,13 +941,15 @@ class abogen(QWidget):
         self.subtitle_format_combo.setStyleSheet(
             "QComboBox { min-height: 20px; padding: 6px 12px; }"
         )
-        self.subtitle_format_combo.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
+        self.subtitle_format_combo.setSizePolicy(
+            QSizePolicy.Expanding, QSizePolicy.Fixed
+        )
         subtitle_formats = [
             ("srt", "SRT (standard)"),
             ("ass_wide", "ASS (wide)"),
             ("ass_narrow", "ASS (narrow)"),
             ("ass_centered_wide", "ASS (centered wide)"),
-            ("ass_centered_narrow", "ASS (centered narrow)")
+            ("ass_centered_narrow", "ASS (centered narrow)"),
         ]
         for value, text in subtitle_formats:
             self.subtitle_format_combo.addItem(text, value)
@@ -927,13 +970,19 @@ class abogen(QWidget):
         replace_newlines_layout.addWidget(replace_newlines_label)
         self.replace_newlines_combo = QComboBox(self)
         self.replace_newlines_combo.addItems(["Disabled", "Enabled"])
-        self.replace_newlines_combo.setToolTip("Replace single newlines in the input text with spaces before processing.")
+        self.replace_newlines_combo.setToolTip(
+            "Replace single newlines in the input text with spaces before processing."
+        )
         self.replace_newlines_combo.setStyleSheet(
             "QComboBox { min-height: 20px; padding: 6px 12px; }"
         )
-        self.replace_newlines_combo.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Fixed)
+        self.replace_newlines_combo.setSizePolicy(
+            QSizePolicy.Expanding, QSizePolicy.Fixed
+        )
         # Set initial value based on config
-        self.replace_newlines_combo.setCurrentIndex(1 if self.replace_single_newlines else 0)
+        self.replace_newlines_combo.setCurrentIndex(
+            1 if self.replace_single_newlines else 0
+        )
         self.replace_newlines_combo.currentIndexChanged.connect(
             lambda idx: self.toggle_replace_single_newlines(idx == 1)
         )
@@ -969,9 +1018,7 @@ class abogen(QWidget):
         selected_folder_label = QLabel("Selected folder:", self.save_path_row_widget)
         save_path_row.addWidget(selected_folder_label)
         self.save_path_label = QLabel("", self.save_path_row_widget)
-        self.save_path_label.setStyleSheet(
-            f"QLabel {{ color: {COLORS['GREEN']}; }}"
-        )
+        self.save_path_label.setStyleSheet(f"QLabel {{ color: {COLORS['GREEN']}; }}")
         self.save_path_label.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Preferred)
         save_path_row.addWidget(self.save_path_label)
         self.save_path_row_widget.hide()  # Hide the whole row by default
@@ -1119,6 +1166,7 @@ class abogen(QWidget):
         dialog.setWindowModality(Qt.NonModal)
         dialog.setModal(False)
         dialog.show()  # We'll handle the dialog result asynchronously
+
         def on_dialog_finished(result):
             if result != QDialog.Accepted:
                 return False
@@ -1161,22 +1209,49 @@ class abogen(QWidget):
 
                     # Save metadata if available
                     meta_dir = os.path.join(project_dir, "metadata")
-                    os.makedirs(meta_dir, exist_ok=True) # Save book metadata if available
+                    os.makedirs(
+                        meta_dir, exist_ok=True
+                    )  # Save book metadata if available
                     if hasattr(dialog, "book_metadata"):
                         meta_path = os.path.join(meta_dir, "book_info.txt")
                         with open(meta_path, "w", encoding="utf-8") as f:
                             # Clean HTML tags from metadata
-                            title = re.sub(r'<[^>]+>', '', str(dialog.book_metadata.get('title', 'Unknown')))
-                            publisher = re.sub(r'<[^>]+>', '', str(dialog.book_metadata.get('publisher', 'Unknown')))
-                            authors = [re.sub(r'<[^>]+>', '', str(author)) for author in dialog.book_metadata.get('authors', ['Unknown'])]
-                            publication_year = re.sub(r'<[^>]+>', '', str(dialog.book_metadata.get('publication_year', 'Unknown')))
+                            title = re.sub(
+                                r"<[^>]+>",
+                                "",
+                                str(dialog.book_metadata.get("title", "Unknown")),
+                            )
+                            publisher = re.sub(
+                                r"<[^>]+>",
+                                "",
+                                str(dialog.book_metadata.get("publisher", "Unknown")),
+                            )
+                            authors = [
+                                re.sub(r"<[^>]+>", "", str(author))
+                                for author in dialog.book_metadata.get(
+                                    "authors", ["Unknown"]
+                                )
+                            ]
+                            publication_year = re.sub(
+                                r"<[^>]+>",
+                                "",
+                                str(
+                                    dialog.book_metadata.get(
+                                        "publication_year", "Unknown"
+                                    )
+                                ),
+                            )
 
                             f.write(f"Title: {title}\n")
                             f.write(f"Authors: {', '.join(authors)}\n")
                             f.write(f"Publisher: {publisher}\n")
                             f.write(f"Publication Year: {publication_year}\n")
-                            if dialog.book_metadata.get('description'):
-                                description = re.sub(r'<[^>]+>', '', str(dialog.book_metadata.get('description')))
+                            if dialog.book_metadata.get("description"):
+                                description = re.sub(
+                                    r"<[^>]+>",
+                                    "",
+                                    str(dialog.book_metadata.get("description")),
+                                )
                                 f.write(f"\nDescription:\n{description}\n")
 
                         # Save cover image if available
@@ -1404,7 +1479,7 @@ class abogen(QWidget):
         self._update_log_main_thread(message)
 
     def _update_log_main_thread(self, message):
-        if not hasattr(self, '_log_lines'):
+        if not hasattr(self, "_log_lines"):
             self._log_lines = []
 
         # Always produce a single HTML line (with color if tuple)
@@ -1423,7 +1498,7 @@ class abogen(QWidget):
 
         # Trim buffer if needed
         if len(self._log_lines) > self.log_window_max_lines:
-            self._log_lines = self._log_lines[-self.log_window_max_lines:]
+            self._log_lines = self._log_lines[-self.log_window_max_lines :]
             self.log_text.clear()
             for line in self._log_lines:
                 self.log_text.insertHtml(line)
@@ -1438,7 +1513,11 @@ class abogen(QWidget):
 
     def _get_queue_progress_format(self, value=None):
         """Return the progress bar format string for queue mode."""
-        if hasattr(self, 'queued_items') and self.queued_items and hasattr(self, 'current_queue_index'):
+        if (
+            hasattr(self, "queued_items")
+            and self.queued_items
+            and hasattr(self, "current_queue_index")
+        ):
             N = self.current_queue_index + 1
             M = len(self.queued_items)
             percent = value if value is not None else self.progress_bar.value()
@@ -1453,7 +1532,11 @@ class abogen(QWidget):
             value = 99
         self.progress_bar.setValue(value)
         # Show queue progress if in queue mode
-        if hasattr(self, 'queued_items') and self.queued_items and hasattr(self, 'current_queue_index'):
+        if (
+            hasattr(self, "queued_items")
+            and self.queued_items
+            and hasattr(self, "current_queue_index")
+        ):
             N = self.current_queue_index + 1
             M = len(self.queued_items)
             self.progress_bar.setFormat(f"{value}% ({N}/{M})")
@@ -1499,9 +1582,9 @@ class abogen(QWidget):
                 pass
             self.btn_start.clicked.connect(self.start_conversion)
 
-    def enqueue(self, item : QueuedItem):
+    def enqueue(self, item: QueuedItem):
         self.queued_items.append(item)
-        #self.update_log((f"Enqueued: {item.file_name}", True))
+        # self.update_log((f"Enqueued: {item.file_name}", True))
         # enable start queue button, manage queue button
         self.enable_disable_queue_buttons()
 
@@ -1509,8 +1592,15 @@ class abogen(QWidget):
         return self.queued_items
 
     def add_to_queue(self):
-        # Use the file currently displayed in the input box
-        file_to_queue = self.displayed_file_path if self.displayed_file_path else self.selected_file
+        # For epub/pdf, always use the converted txt file (selected_file)
+        if self.selected_file_type in ["epub", "pdf"]:
+            file_to_queue = self.selected_file
+        else:
+            file_to_queue = (
+                self.displayed_file_path
+                if self.displayed_file_path
+                else self.selected_file
+            )
 
         if not file_to_queue:
             self.input_box.set_error("Please add a file.")
@@ -1529,23 +1619,26 @@ class abogen(QWidget):
             subtitle_mode=actual_subtitle_mode,
             output_format=self.selected_format,
             total_char_count=self.char_count,
-            replace_single_newlines=self.replace_single_newlines
+            replace_single_newlines=self.replace_single_newlines,
         )
 
         # Prevent adding duplicate items to the queue
         for queued_item in self.queued_items:
             if (
-                queued_item.file_name == item_queue.file_name and
-                queued_item.lang_code == item_queue.lang_code and
-                queued_item.speed == item_queue.speed and
-                queued_item.voice == item_queue.voice and
-                queued_item.save_option == item_queue.save_option and
-                queued_item.output_folder == item_queue.output_folder and
-                queued_item.subtitle_mode == item_queue.subtitle_mode and
-                queued_item.output_format == item_queue.output_format and
-                getattr(queued_item, "replace_single_newlines", False) == item_queue.replace_single_newlines
+                queued_item.file_name == item_queue.file_name
+                and queued_item.lang_code == item_queue.lang_code
+                and queued_item.speed == item_queue.speed
+                and queued_item.voice == item_queue.voice
+                and queued_item.save_option == item_queue.save_option
+                and queued_item.output_folder == item_queue.output_folder
+                and queued_item.subtitle_mode == item_queue.subtitle_mode
+                and queued_item.output_format == item_queue.output_format
+                and getattr(queued_item, "replace_single_newlines", False)
+                == item_queue.replace_single_newlines
             ):
-                QMessageBox.warning(self, "Duplicate Item", "This item is already in the queue.")
+                QMessageBox.warning(
+                    self, "Duplicate Item", "This item is already in the queue."
+                )
                 return
 
         self.enqueue(item_queue)
@@ -1562,7 +1655,7 @@ class abogen(QWidget):
                 "Confirm Clear Queue",
                 f"Are you sure you want to clear {len(self.queued_items)} items from the queue?",
                 QMessageBox.Yes | QMessageBox.No,
-                QMessageBox.No
+                QMessageBox.No,
             )
             if reply != QMessageBox.Yes:
                 return
@@ -1598,7 +1691,9 @@ class abogen(QWidget):
             self.subtitle_mode = queued_item.subtitle_mode
             self.selected_format = queued_item.output_format
             self.char_count = queued_item.total_char_count
-            self.replace_single_newlines = getattr(queued_item, "replace_single_newlines", False)
+            self.replace_single_newlines = getattr(
+                queued_item, "replace_single_newlines", False
+            )
             self.start_conversion(from_queue=True)
         else:
             # Queue finished, reset index
@@ -1612,7 +1707,6 @@ class abogen(QWidget):
         else:
             self.current_queue_index = 0  # Reset for next time
 
-
     def get_voice_formula(self) -> str:
         if self.mixed_voice_state:
             formula_components = [
@@ -1625,6 +1719,7 @@ class abogen(QWidget):
     def get_selected_lang(self, voice_formula) -> str:
         if self.selected_profile_name:
             from abogen.voice_profiles import load_profiles
+
             entry = load_profiles().get(self.selected_profile_name, {})
             selected_lang = entry.get("language")
         else:
@@ -1636,11 +1731,7 @@ class abogen(QWidget):
         return selected_lang
 
     def get_actual_subtitle_mode(self) -> str:
-        return (
-                "Disabled"
-                if not self.subtitle_combo.isEnabled()
-                else self.subtitle_mode
-            )
+        return "Disabled" if not self.subtitle_combo.isEnabled() else self.subtitle_mode
 
     def start_conversion(self, from_queue=False):
         if not self.selected_file:
@@ -1651,7 +1742,12 @@ class abogen(QWidget):
         self.convert_input_box_to_log()
         self.progress_bar.setValue(0)
         # Show queue progress if in queue mode
-        if from_queue and hasattr(self, 'queued_items') and self.queued_items and hasattr(self, 'current_queue_index'):
+        if (
+            from_queue
+            and hasattr(self, "queued_items")
+            and self.queued_items
+            and hasattr(self, "current_queue_index")
+        ):
             N = self.current_queue_index + 1
             M = len(self.queued_items)
             self.progress_bar.setFormat(f"0% ({N}/{M})")
@@ -1725,9 +1821,13 @@ class abogen(QWidget):
                 self.replace_single_newlines
             )
             # Pass separate_chapters_format setting
-            self.conversion_thread.separate_chapters_format = self.separate_chapters_format
+            self.conversion_thread.separate_chapters_format = (
+                self.separate_chapters_format
+            )
             # Pass subtitle format setting
-            self.conversion_thread.subtitle_format = self.config.get("subtitle_format", "ass_centered_narrow")
+            self.conversion_thread.subtitle_format = self.config.get(
+                "subtitle_format", "ass_centered_narrow"
+            )
             # Pass chapter count for EPUB or PDF files
             if self.selected_file_type in ["epub", "pdf"] and hasattr(
                 self, "selected_chapters"
@@ -1781,7 +1881,6 @@ class abogen(QWidget):
             f"Processed {len(self.queued_items)} items:<br><br>"
         )
 
-        
         for idx, item in enumerate(self.queued_items, 1):
             output = getattr(item, "output_path", None)
             if not output:
@@ -1834,7 +1933,7 @@ class abogen(QWidget):
                 else self.selected_file
             )
             # Only repopulate if not cleared by queue
-            if not getattr(self, 'input_box_cleared_by_queue', False):
+            if not getattr(self, "input_box_cleared_by_queue", False):
                 if display_path and os.path.exists(display_path):
                     self.input_box.set_file_info(display_path)
                 else:
@@ -1873,7 +1972,10 @@ class abogen(QWidget):
             self.open_file_btn.setVisible(show_open_file_button)
 
         # Only show finish_widget if queue is done
-        if self.current_queue_index + 1 >= len(self.queued_items) or not self.queued_items:
+        if (
+            self.current_queue_index + 1 >= len(self.queued_items)
+            or not self.queued_items
+        ):
             # Queue finished, show finish screen
             self.controls_widget.hide()
             self.finish_widget.show()
@@ -1938,7 +2040,7 @@ class abogen(QWidget):
         )
 
         # Only repopulate if not cleared by queue
-        if not getattr(self, 'input_box_cleared_by_queue', False):
+        if not getattr(self, "input_box_cleared_by_queue", False):
             if display_path and os.path.exists(display_path):
                 self.input_box.set_file_info(display_path)
             else:
@@ -2031,6 +2133,7 @@ class abogen(QWidget):
             voice_to_cache = voice_formula
             if self.selected_profile_name:
                 from abogen.voice_profiles import load_profiles
+
                 entry = load_profiles().get(self.selected_profile_name, {})
                 lang_to_cache = entry.get("language")
             else:
@@ -2053,7 +2156,9 @@ class abogen(QWidget):
         cache_dir = os.path.join(tempfile.gettempdir(), PROGRAM_NAME, "preview_cache")
 
         if "*" in voice_to_cache:  # Voice formula
-            voice_id = f"voice_formula_{hashlib.md5(voice_to_cache.encode()).hexdigest()[:8]}"
+            voice_id = (
+                f"voice_formula_{hashlib.md5(voice_to_cache.encode()).hexdigest()[:8]}"
+            )
         else:  # Single voice
             voice_id = voice_to_cache
 
@@ -2096,13 +2201,17 @@ class abogen(QWidget):
             try:
                 # Ensure pygame mixer is initialized for the audio thread
                 import pygame
+
                 if not pygame.mixer.get_init():
                     pygame.mixer.init()
 
                 self.play_audio_thread = PlayAudioThread(cached_path)
                 self.play_audio_thread.finished.connect(cleanup_cached_play)
                 self.play_audio_thread.error.connect(
-                    lambda msg: (self._show_preview_error_box(msg), cleanup_cached_play())
+                    lambda msg: (
+                        self._show_preview_error_box(msg),
+                        cleanup_cached_play(),
+                    )
                 )
                 self.play_audio_thread.start()
             except Exception as e:
@@ -2192,23 +2301,29 @@ class abogen(QWidget):
 
     def _play_preview_audio(self, from_cache=True):  # from_cache default is now False
         # If preview_thread is the source, get temp_wav from it
-        if hasattr(self, 'preview_thread') and not from_cache:
+        if hasattr(self, "preview_thread") and not from_cache:
             temp_wav = self.preview_thread.temp_wav
         elif from_cache:  # This case is now handled before calling _play_preview_audio
             cached_path = self._get_preview_cache_path()
             if cached_path and os.path.exists(cached_path):
                 temp_wav = cached_path
             else:  # Should not happen if cache check was done
-                self._show_error_message_box("Preview Error", "Cache file expected but not found, please try again.")
+                self._show_error_message_box(
+                    "Preview Error",
+                    "Cache file expected but not found, please try again.",
+                )
                 self._preview_cleanup()
                 return
         else:  # Should have temp_wav from preview_thread or handled by cache check
-            self._show_error_message_box("Preview Error", "Preview audio path not found.")
+            self._show_error_message_box(
+                "Preview Error", "Preview audio path not found."
+            )
             self._preview_cleanup()
             return
 
         if not temp_wav:
-            if hasattr(self, 'loading_movie'): self.loading_movie.stop()
+            if hasattr(self, "loading_movie"):
+                self.loading_movie.stop()
             self._show_error_message_box(
                 "Preview Error", "Preview error: No audio generated."
             )
@@ -2216,7 +2331,8 @@ class abogen(QWidget):
             return
 
         # stop loading animation, switch to stop icon
-        if hasattr(self, 'loading_movie'): self.loading_movie.stop()
+        if hasattr(self, "loading_movie"):
+            self.loading_movie.stop()
         self.preview_playing = True
         self.btn_preview.setIcon(self.stop_icon)
         self.btn_preview.setToolTip("Stop preview")
@@ -2224,9 +2340,16 @@ class abogen(QWidget):
 
         def cleanup():
             # Only remove if not from cache AND it's a temp file from VoicePreviewThread
-            if not from_cache and hasattr(self, 'preview_thread') and hasattr(self.preview_thread, 'temp_wav') and self.preview_thread.temp_wav == temp_wav:
+            if (
+                not from_cache
+                and hasattr(self, "preview_thread")
+                and hasattr(self.preview_thread, "temp_wav")
+                and self.preview_thread.temp_wav == temp_wav
+            ):
                 try:
-                    if os.path.exists(temp_wav):  # Ensure it exists before trying to remove
+                    if os.path.exists(
+                        temp_wav
+                    ):  # Ensure it exists before trying to remove
                         os.remove(temp_wav)
                 except Exception:
                     pass
@@ -2235,6 +2358,7 @@ class abogen(QWidget):
         try:
             # Ensure pygame mixer is initialized for the audio thread
             import pygame
+
             if not pygame.mixer.get_init():
                 pygame.mixer.init()
 
@@ -2266,9 +2390,11 @@ class abogen(QWidget):
 
     def _preview_cleanup(self):
         self.preview_playing = False
-        if hasattr(self, 'loading_movie'): self.loading_movie.stop()
+        if hasattr(self, "loading_movie"):
+            self.loading_movie.stop()
         try:
-            if hasattr(self, 'loading_movie'): self.loading_movie.frameChanged.disconnect()
+            if hasattr(self, "loading_movie"):
+                self.loading_movie.frameChanged.disconnect()
         except Exception:
             pass  # Ignore error if not connected
         self.btn_preview.setIcon(self.play_icon)
@@ -2301,10 +2427,12 @@ class abogen(QWidget):
             ):
                 if not hasattr(self, "_conversion_lock"):
                     self._conversion_lock = threading.Lock()
+
                 def _cancel():
                     with self._conversion_lock:
                         self.conversion_thread.cancel()  # <-- Use cancel() method
                         self.conversion_thread.wait()
+
                 threading.Thread(target=_cancel, daemon=True).start()
 
             self.is_converting = False
@@ -2323,7 +2451,7 @@ class abogen(QWidget):
                 else self.selected_file
             )
             # Only repopulate if not cleared by queue
-            if not getattr(self, 'input_box_cleared_by_queue', False):
+            if not getattr(self, "input_box_cleared_by_queue", False):
                 if display_path and os.path.exists(display_path):
                     self.input_box.set_file_info(display_path)
                 else:
@@ -2409,9 +2537,10 @@ class abogen(QWidget):
         def is_windows_dark_mode():
             try:
                 import winreg
+
                 with winreg.OpenKey(
                     winreg.HKEY_CURRENT_USER,
-                    r"Software\Microsoft\Windows\CurrentVersion\Themes\Personalize"
+                    r"Software\Microsoft\Windows\CurrentVersion\Themes\Personalize",
                 ) as key:
                     value, _ = winreg.QueryValueEx(key, "AppsUseLightTheme")
                     return value == 0
@@ -2436,14 +2565,23 @@ class abogen(QWidget):
             palette.setColor(QPalette.ColorRole.Button, button_bg)
             palette.setColor(QPalette.ColorRole.ButtonText, Qt.GlobalColor.white)
             # Disabled roles
-            palette.setColor(QPalette.ColorGroup.Disabled, QPalette.ColorRole.WindowText, disabled_fg)
-            palette.setColor(QPalette.ColorGroup.Disabled, QPalette.ColorRole.Text, disabled_fg)
-            palette.setColor(QPalette.ColorGroup.Disabled, QPalette.ColorRole.ButtonText, disabled_fg)
-            palette.setColor(QPalette.ColorGroup.Disabled, QPalette.ColorRole.Base, dark_bg)
-            palette.setColor(QPalette.ColorGroup.Disabled, QPalette.ColorRole.Button, dark_bg)
+            palette.setColor(
+                QPalette.ColorGroup.Disabled, QPalette.ColorRole.WindowText, disabled_fg
+            )
+            palette.setColor(
+                QPalette.ColorGroup.Disabled, QPalette.ColorRole.Text, disabled_fg
+            )
+            palette.setColor(
+                QPalette.ColorGroup.Disabled, QPalette.ColorRole.ButtonText, disabled_fg
+            )
+            palette.setColor(
+                QPalette.ColorGroup.Disabled, QPalette.ColorRole.Base, dark_bg
+            )
+            palette.setColor(
+                QPalette.ColorGroup.Disabled, QPalette.ColorRole.Button, dark_bg
+            )
             app.setPalette(palette)
 
-
         def set_light_palette():
             palette = QPalette()
             disabled_fg = QColor(COLORS["LIGHT_DISABLED"])
@@ -2457,11 +2595,25 @@ class abogen(QWidget):
             palette.setColor(QPalette.ColorRole.Button, Qt.GlobalColor.white)
             palette.setColor(QPalette.ColorRole.ButtonText, Qt.GlobalColor.black)
             # Disabled roles
-            palette.setColor(QPalette.ColorGroup.Disabled, QPalette.ColorRole.WindowText, disabled_fg)
-            palette.setColor(QPalette.ColorGroup.Disabled, QPalette.ColorRole.Text, disabled_fg)
-            palette.setColor(QPalette.ColorGroup.Disabled, QPalette.ColorRole.ButtonText, disabled_fg)
-            palette.setColor(QPalette.ColorGroup.Disabled, QPalette.ColorRole.Base, Qt.GlobalColor.white)
-            palette.setColor(QPalette.ColorGroup.Disabled, QPalette.ColorRole.Button, Qt.GlobalColor.white)
+            palette.setColor(
+                QPalette.ColorGroup.Disabled, QPalette.ColorRole.WindowText, disabled_fg
+            )
+            palette.setColor(
+                QPalette.ColorGroup.Disabled, QPalette.ColorRole.Text, disabled_fg
+            )
+            palette.setColor(
+                QPalette.ColorGroup.Disabled, QPalette.ColorRole.ButtonText, disabled_fg
+            )
+            palette.setColor(
+                QPalette.ColorGroup.Disabled,
+                QPalette.ColorRole.Base,
+                Qt.GlobalColor.white,
+            )
+            palette.setColor(
+                QPalette.ColorGroup.Disabled,
+                QPalette.ColorRole.Button,
+                Qt.GlobalColor.white,
+            )
             app.setPalette(palette)
 
         # --- Dark title bar support for Windows ---
@@ -2473,12 +2625,19 @@ class abogen(QWidget):
                     set_window_attribute = ctypes.windll.dwmapi.DwmSetWindowAttribute
                     hwnd = int(window.winId())
                     value = ctypes.c_int(2 if enable else 0)
-                    set_window_attribute(hwnd, DWMWA_USE_IMMERSIVE_DARK_MODE, ctypes.byref(value), ctypes.sizeof(value))
+                    set_window_attribute(
+                        hwnd,
+                        DWMWA_USE_IMMERSIVE_DARK_MODE,
+                        ctypes.byref(value),
+                        ctypes.sizeof(value),
+                    )
                 except Exception:
                     pass
 
         # Main logic
-        dark_mode = theme == "dark" or (theme == "system" and is_windows and is_windows_dark_mode())
+        dark_mode = theme == "dark" or (
+            theme == "system" and is_windows and is_windows_dark_mode()
+        )
         if dark_mode:
             app.setStyle("Fusion")
             set_dark_palette()
@@ -2512,7 +2671,10 @@ class abogen(QWidget):
             delattr(app, "_dark_titlebar_event_filter")
 
         def get_dark_mode():
-            return theme == "dark" or (theme == "system" and is_windows and is_windows_dark_mode())
+            return theme == "dark" or (
+                theme == "system" and is_windows and is_windows_dark_mode()
+            )
+
         app._dark_titlebar_event_filter = DarkTitleBarEventFilter(
             is_windows, get_dark_mode, set_title_bar_dark_mode
         )
@@ -2554,7 +2716,9 @@ class abogen(QWidget):
 
         # Add separate chapters format option
         separate_chapters_format_menu = QMenu("Separate chapters audio format", self)
-        separate_chapters_format_menu.setToolTip("Choose the format for individual chapter files")
+        separate_chapters_format_menu.setToolTip(
+            "Choose the format for individual chapter files"
+        )
 
         format_group = QActionGroup(self)
         format_group.setExclusive(True)
@@ -2563,7 +2727,11 @@ class abogen(QWidget):
             format_action = QAction(format_option, self)
             format_action.setCheckable(True)
             format_action.setChecked(self.separate_chapters_format == format_option)
-            format_action.triggered.connect(lambda checked, fmt=format_option: self.set_separate_chapters_format(fmt))
+            format_action.triggered.connect(
+                lambda checked, fmt=format_option: self.set_separate_chapters_format(
+                    fmt
+                )
+            )
             format_group.addAction(format_action)
             separate_chapters_format_menu.addAction(format_action)
 
@@ -2584,7 +2752,11 @@ class abogen(QWidget):
         # Add shortcut to desktop (Windows or Linux)
         if platform.system() == "Windows" or platform.system() == "Linux":
             # Use extended label on Linux
-            label = "Create desktop shortcut and install" if platform.system() == "Linux" else "Create desktop shortcut"
+            label = (
+                "Create desktop shortcut and install"
+                if platform.system() == "Linux"
+                else "Create desktop shortcut"
+            )
             add_shortcut_action = QAction(label, self)
             add_shortcut_action.triggered.connect(self.add_shortcut_to_desktop)
             menu.addAction(add_shortcut_action)
@@ -2673,7 +2845,9 @@ class abogen(QWidget):
                 target = os.path.join(python_dir, "Scripts", "abogen.exe")
                 if not os.path.exists(target):
                     QMessageBox.critical(
-                        self, "Shortcut Error", f"Could not find abogen.exe at:\n{target}"
+                        self,
+                        "Shortcut Error",
+                        f"Could not find abogen.exe at:\n{target}",
                     )
                     return
 
@@ -2683,13 +2857,19 @@ class abogen(QWidget):
                     icon = target  # Create a more direct PowerShell command
                 shortcut_ps = shortcut_path.replace("'", "''").replace("\\", "\\\\")
                 target_ps = target.replace("'", "''").replace("\\", "\\\\")
-                workdir_ps = os.path.dirname(target).replace("'", "''").replace("\\", "\\\\")
+                workdir_ps = (
+                    os.path.dirname(target).replace("'", "''").replace("\\", "\\\\")
+                )
                 icon_ps = icon.replace("'", "''").replace("\\", "\\\\")
                 # Create PowerShell script as a single line with no line breaks (more reliable)
                 ps_cmd = f"$s=New-Object -ComObject WScript.Shell; $lnk=$s.CreateShortcut('{shortcut_ps}'); $lnk.TargetPath='{target_ps}'; $lnk.WorkingDirectory='{workdir_ps}'; $lnk.IconLocation='{icon_ps}'; $lnk.Save()"
 
                 # Run PowerShell with the command directly
-                proc = create_process("powershell -NoProfile -ExecutionPolicy Bypass -Command \"" + ps_cmd + "\"")
+                proc = create_process(
+                    'powershell -NoProfile -ExecutionPolicy Bypass -Command "'
+                    + ps_cmd
+                    + '"'
+                )
                 proc.wait()
 
                 if proc.returncode == 0:
@@ -2702,17 +2882,20 @@ class abogen(QWidget):
                     QMessageBox.critical(
                         self,
                         "Shortcut Error",
-                        f"PowerShell failed with exit code: {proc.returncode}"
+                        f"PowerShell failed with exit code: {proc.returncode}",
                     )
             elif platform.system() == "Linux":
                 desktop = user_desktop_dir()
                 if not desktop or not os.path.isdir(desktop):
-                    QMessageBox.critical(self, "Shortcut Error", "Could not determine desktop directory.")
+                    QMessageBox.critical(
+                        self, "Shortcut Error", "Could not determine desktop directory."
+                    )
                     return
 
                 shortcut_path = os.path.join(desktop, "abogen.desktop")
 
                 import shutil
+
                 found = shutil.which("abogen")
                 if found:
                     target = found
@@ -2728,7 +2911,11 @@ class abogen(QWidget):
                             if os.path.exists(target_fallback):
                                 target = target_fallback
                             else:
-                                QMessageBox.critical(self, "Shortcut Error", "Could not find abogen executable in PATH or common installation directories.")
+                                QMessageBox.critical(
+                                    self,
+                                    "Shortcut Error",
+                                    "Could not find abogen executable in PATH or common installation directories.",
+                                )
                                 return
 
                 icon_path = get_resource_path("abogen.assets", "icon.png")
@@ -2763,6 +2950,7 @@ Categories=AudioVideo;Audio;Utility;
                 )
                 if reply == QMessageBox.Yes:
                     import shutil
+
                     user_app_dir = os.path.expanduser("~/.local/share/applications")
                     os.makedirs(user_app_dir, exist_ok=True)
                     user_entry = os.path.join(user_app_dir, "abogen.desktop")
@@ -2782,7 +2970,9 @@ Categories=AudioVideo;Audio;Utility;
                         )
             else:
                 QMessageBox.information(
-                    self, "Unsupported OS", "Desktop shortcut creation is not supported on this operating system."
+                    self,
+                    "Unsupported OS",
+                    "Desktop shortcut creation is not supported on this operating system.",
                 )
 
         except Exception as e:
@@ -3057,9 +3247,7 @@ Categories=AudioVideo;Audio;Utility;
                 result_msg += f"\nAlso deleted {deleted_preview_count} preview cache file{'s' if deleted_preview_count != 1 else ''}."
 
             # Show results
-            QMessageBox.information(
-                self, "Temporary Files Cleared", result_msg
-            )
+            QMessageBox.information(self, "Temporary Files Cleared", result_msg)
 
             # If currently selected file is in the temp directory, clear the UI
             if (
@@ -3139,4 +3327,3 @@ Categories=AudioVideo;Audio;Utility;
 
     def show_model_download_warning(self, title, message):
         QMessageBox.information(self, title, message)
-

abogen/hf_tracker.py

@@ -1,16 +1,20 @@
 log_callback = None
 show_warning_signal_emitter = None  # Renamed for clarity
 
+
 def set_log_callback(cb):
     global log_callback
     log_callback = cb
 
+
 def set_show_warning_signal_emitter(emitter):  # Renamed for clarity
     global show_warning_signal_emitter
     show_warning_signal_emitter = emitter
 
+
 from huggingface_hub import hf_hub_download
 
+
 def tracked_hf_hub_download(*args, **kwargs):
     try:
         local_kwargs = dict(kwargs)
@@ -22,7 +26,10 @@ def tracked_hf_hub_download(*args, **kwargs):
         if filename.endswith(".pth"):
             msg = f"\nDownloading model '{filename}' from Hugging Face ({repo_id}). This may take a while. Please wait..."
             if show_warning_signal_emitter:  # Check if the emitter is set
-                show_warning_signal_emitter.emit("Downloading Model", f"Downloading model '{filename}' from Hugging Face repository '{repo_id}'. This may take a while, please wait.")
+                show_warning_signal_emitter.emit(
+                    "Downloading Model",
+                    f"Downloading model '{filename}' from Hugging Face repository '{repo_id}'. This may take a while, please wait.",
+                )
         else:
             msg = f"\nDownloading '{filename}' from Hugging Face ({repo_id}). Please wait..."
         if log_callback:
@@ -32,5 +39,7 @@ def tracked_hf_hub_download(*args, **kwargs):
             print(msg, flush=True)
     return hf_hub_download(*args, **kwargs)
 
+
 import huggingface_hub
+
 huggingface_hub.hf_hub_download = tracked_hf_hub_download

abogen/is_nvidia.py

@@ -1,18 +1,20 @@
 import gpustat
 
+
 def check():
     try:
         stats = gpustat.new_query()
     except Exception:
         return False
 
-    nvidia_keywords = ['nvidia', 'rtx', 'gtx', 'quadro', 'tesla', 'titan', 'mx']
+    nvidia_keywords = ["nvidia", "rtx", "gtx", "quadro", "tesla", "titan", "mx"]
     for gpu in stats.gpus:
         name = gpu.name.lower()
         if any(keyword in name for keyword in nvidia_keywords):
             return True
     return False
 
+
 if __name__ == "__main__":
     stats = gpustat.new_query()
     for gpu in stats.gpus:

abogen/main.py

@@ -25,6 +25,7 @@ if sys.stderr is None:
 if platform.system() == "Darwin" and platform.processor() == "arm":
     os.environ["PYTORCH_ENABLE_MPS_FALLBACK"] = "1"
 
+
 # Custom message handler to filter out specific Qt warnings
 def qt_message_handler(mode, context, message):
     if "Wayland does not support QWindow::requestActivate()" in message:

abogen/queue_manager_gui.py

@@ -20,6 +20,7 @@ from abogen.constants import COLORS
 from copy import deepcopy
 from PyQt5.QtGui import QFontMetrics
 
+
 class ElidedLabel(QLabel):
     def __init__(self, text, parent=None):
         super().__init__(text, parent)
@@ -40,6 +41,7 @@ class ElidedLabel(QLabel):
     def fullText(self):
         return self._full_text
 
+
 class QueueListItemWidget(QWidget):
     def __init__(self, file_name, char_count):
         super().__init__()
@@ -47,6 +49,7 @@ class QueueListItemWidget(QWidget):
         layout.setContentsMargins(12, 0, 6, 0)
         layout.setSpacing(0)
         import os
+
         name_label = ElidedLabel(os.path.basename(file_name))
         char_label = QLabel(f"Chars: {char_count}")
         char_label.setStyleSheet(f"color: {COLORS['LIGHT_DISABLED']};")
@@ -56,6 +59,7 @@ class QueueListItemWidget(QWidget):
         layout.addWidget(char_label, 0)
         self.setLayout(layout)
 
+
 class DroppableQueueListWidget(QListWidget):
     def __init__(self, parent_dialog):
         super().__init__()
@@ -73,7 +77,7 @@ class DroppableQueueListWidget(QListWidget):
     def dragEnterEvent(self, event):
         if event.mimeData().hasUrls():
             for url in event.mimeData().urls():
-                if url.isLocalFile() and url.toLocalFile().lower().endswith('.txt'):
+                if url.isLocalFile() and url.toLocalFile().lower().endswith(".txt"):
                     self.drag_overlay.resize(self.size())
                     self.drag_overlay.setVisible(True)
                     event.acceptProposedAction()
@@ -84,7 +88,7 @@ class DroppableQueueListWidget(QListWidget):
     def dragMoveEvent(self, event):
         if event.mimeData().hasUrls():
             for url in event.mimeData().urls():
-                if url.isLocalFile() and url.toLocalFile().lower().endswith('.txt'):
+                if url.isLocalFile() and url.toLocalFile().lower().endswith(".txt"):
                     event.acceptProposedAction()
                     return
         event.ignore()
@@ -96,7 +100,11 @@ class DroppableQueueListWidget(QListWidget):
     def dropEvent(self, event):
         self.drag_overlay.setVisible(False)
         if event.mimeData().hasUrls():
-            file_paths = [url.toLocalFile() for url in event.mimeData().urls() if url.isLocalFile() and url.toLocalFile().lower().endswith('.txt')]
+            file_paths = [
+                url.toLocalFile()
+                for url in event.mimeData().urls()
+                if url.isLocalFile() and url.toLocalFile().lower().endswith(".txt")
+            ]
             if file_paths:
                 self.parent_dialog.add_files_from_paths(file_paths)
                 event.acceptProposedAction()
@@ -107,14 +115,17 @@ class DroppableQueueListWidget(QListWidget):
 
     def resizeEvent(self, event):
         super().resizeEvent(event)
-        if hasattr(self, 'drag_overlay'):
+        if hasattr(self, "drag_overlay"):
             self.drag_overlay.resize(self.size())
 
+
 class QueueManager(QDialog):
     def __init__(self, parent, queue: list, title="Queue Manager", size=(600, 700)):
         super().__init__()
         self.queue = queue
-        self._original_queue = deepcopy(queue)  # Store a deep copy of the original queue
+        self._original_queue = deepcopy(
+            queue
+        )  # Store a deep copy of the original queue
         self.parent = parent
         layout = QVBoxLayout()
         layout.setContentsMargins(15, 15, 15, 15)  # set main layout margins
@@ -141,10 +152,12 @@ class QueueManager(QDialog):
         # Overlay label for empty queue
         self.empty_overlay = QLabel(
             "Drag and drop your text files here or use the 'Add files' button.",
-            self.listwidget
+            self.listwidget,
         )
         self.empty_overlay.setAlignment(Qt.AlignCenter)
-        self.empty_overlay.setStyleSheet(f"color: {COLORS['LIGHT_DISABLED']}; background: transparent; padding: 20px;")
+        self.empty_overlay.setStyleSheet(
+            f"color: {COLORS['LIGHT_DISABLED']}; background: transparent; padding: 20px;"
+        )
         self.empty_overlay.setWordWrap(True)
         self.empty_overlay.setAttribute(Qt.WA_TransparentForMouseEvents, True)
         self.empty_overlay.hide()
@@ -208,13 +221,14 @@ class QueueManager(QDialog):
             file_name = item.file_name
             display_name = file_name
             import os
+
             if os.path.sep in file_name:
                 display_name = os.path.basename(file_name)
             # Get icon for the file
             icon = icon_provider.icon(QFileInfo(file_name))
             list_item = QListWidgetItem()
             # Set tooltip with detailed info
-            output_folder = getattr(item, 'output_folder', '')
+            output_folder = getattr(item, "output_folder", "")
             tooltip = (
                 f"<b>Path:</b> {file_name}<br>"
                 f"<b>Language:</b> {getattr(item, 'lang_code', '')}<br>"
@@ -222,7 +236,7 @@ class QueueManager(QDialog):
                 f"<b>Voice:</b> {getattr(item, 'voice', '')}<br>"
                 f"<b>Save Option:</b> {getattr(item, 'save_option', '')}<br>"
             )
-            if output_folder not in (None, '', 'None'):
+            if output_folder not in (None, "", "None"):
                 tooltip += f"<b>Output Folder:</b> {output_folder}<br>"
             tooltip += (
                 f"<b>Subtitle Mode:</b> {getattr(item, 'subtitle_mode', '')}<br>"
@@ -233,7 +247,7 @@ class QueueManager(QDialog):
             list_item.setToolTip(tooltip)
             list_item.setIcon(icon)
             # Use custom widget for display
-            char_count = getattr(item, 'total_char_count', 0)
+            char_count = getattr(item, "total_char_count", 0)
             widget = QueueListItemWidget(file_name, char_count)
             self.listwidget.addItem(list_item)
             self.listwidget.setItemWidget(list_item, widget)
@@ -244,6 +258,7 @@ class QueueManager(QDialog):
         if not items:
             return
         from PyQt5.QtWidgets import QMessageBox
+
         # Remove by index to ensure correct mapping
         rows = sorted([self.listwidget.row(item) for item in items], reverse=True)
         # Warn user if removing multiple files
@@ -253,7 +268,7 @@ class QueueManager(QDialog):
                 "Confirm Remove",
                 f"Are you sure you want to remove {len(rows)} selected items from the queue?",
                 QMessageBox.Yes | QMessageBox.No,
-                QMessageBox.No
+                QMessageBox.No,
             )
             if reply != QMessageBox.Yes:
                 return
@@ -265,19 +280,22 @@ class QueueManager(QDialog):
 
     def clear_queue(self):
         from PyQt5.QtWidgets import QMessageBox
+
         if len(self.queue) > 1:
             reply = QMessageBox.question(
                 self,
                 "Confirm Clear Queue",
                 f"Are you sure you want to clear {len(self.queue)} items from the queue?",
                 QMessageBox.Yes | QMessageBox.No,
-                QMessageBox.No
+                QMessageBox.No,
             )
             if reply != QMessageBox.Yes:
                 return
         self.queue.clear()
         self.listwidget.clear()
-        self.empty_overlay.resize(self.listwidget.size())  # Ensure overlay is sized correctly
+        self.empty_overlay.resize(
+            self.listwidget.size()
+        )  # Ensure overlay is sized correctly
         self.empty_overlay.show()  # Show the overlay when queue is empty
         self.update_button_states()
 
@@ -290,56 +308,74 @@ class QueueManager(QDialog):
         parent = self.parent
         if parent is not None:
             # lang_code: use parent's get_voice_formula and get_selected_lang
-            if hasattr(parent, 'get_voice_formula') and hasattr(parent, 'get_selected_lang'):
+            if hasattr(parent, "get_voice_formula") and hasattr(
+                parent, "get_selected_lang"
+            ):
                 voice_formula = parent.get_voice_formula()
-                attrs['lang_code'] = parent.get_selected_lang(voice_formula)
-                attrs['voice'] = voice_formula
+                attrs["lang_code"] = parent.get_selected_lang(voice_formula)
+                attrs["voice"] = voice_formula
             else:
-                attrs['lang_code'] = getattr(parent, 'selected_lang', '')
-                attrs['voice'] = getattr(parent, 'selected_voice', '')
+                attrs["lang_code"] = getattr(parent, "selected_lang", "")
+                attrs["voice"] = getattr(parent, "selected_voice", "")
             # speed
-            if hasattr(parent, 'speed_slider'):
-                attrs['speed'] = parent.speed_slider.value() / 100.0
+            if hasattr(parent, "speed_slider"):
+                attrs["speed"] = parent.speed_slider.value() / 100.0
             else:
-                attrs['speed'] = getattr(parent, 'speed', 1.0)
+                attrs["speed"] = getattr(parent, "speed", 1.0)
             # save_option
-            attrs['save_option'] = getattr(parent, 'save_option', '')
+            attrs["save_option"] = getattr(parent, "save_option", "")
             # output_folder
-            attrs['output_folder'] = getattr(parent, 'selected_output_folder', '')
+            attrs["output_folder"] = getattr(parent, "selected_output_folder", "")
             # subtitle_mode
-            if hasattr(parent, 'get_actual_subtitle_mode'):
-                attrs['subtitle_mode'] = parent.get_actual_subtitle_mode()
+            if hasattr(parent, "get_actual_subtitle_mode"):
+                attrs["subtitle_mode"] = parent.get_actual_subtitle_mode()
             else:
-                attrs['subtitle_mode'] = getattr(parent, 'subtitle_mode', '')
+                attrs["subtitle_mode"] = getattr(parent, "subtitle_mode", "")
             # output_format
-            attrs['output_format'] = getattr(parent, 'selected_format', '')
+            attrs["output_format"] = getattr(parent, "selected_format", "")
             # total_char_count
-            attrs['total_char_count'] = getattr(parent, 'char_count', '')
+            attrs["total_char_count"] = getattr(parent, "char_count", "")
             # replace_single_newlines
-            attrs['replace_single_newlines'] = getattr(parent, 'replace_single_newlines', False)
+            attrs["replace_single_newlines"] = getattr(
+                parent, "replace_single_newlines", False
+            )
         else:
             # fallback: empty values
-            attrs = {k: '' for k in [
-                'lang_code', 'speed', 'voice', 'save_option',
-                'output_folder', 'subtitle_mode', 'output_format', 'total_char_count', 'replace_single_newlines']}
+            attrs = {
+                k: ""
+                for k in [
+                    "lang_code",
+                    "speed",
+                    "voice",
+                    "save_option",
+                    "output_folder",
+                    "subtitle_mode",
+                    "output_format",
+                    "total_char_count",
+                    "replace_single_newlines",
+                ]
+            }
         return attrs
 
     def add_files_from_paths(self, file_paths):
         from abogen.utils import calculate_text_length
         from PyQt5.QtWidgets import QMessageBox
         import os
+
         current_attrs = self.get_current_attributes()
         duplicates = []
         for file_path in file_paths:
+
             class QueueItem:
                 pass
+
             item = QueueItem()
             item.file_name = file_path
             for attr, value in current_attrs.items():
                 setattr(item, attr, value)
             # Read file content and calculate total_char_count using calculate_text_length
             try:
-                with open(file_path, 'r', encoding='utf-8', errors='ignore') as f:
+                with open(file_path, "r", encoding="utf-8", errors="ignore") as f:
                     file_content = f.read()
                 item.total_char_count = calculate_text_length(file_content)
             except Exception:
@@ -348,16 +384,26 @@ class QueueManager(QDialog):
             is_duplicate = False
             for queued_item in self.queue:
                 if (
-                    getattr(queued_item, 'file_name', None) == getattr(item, 'file_name', None) and
-                    getattr(queued_item, 'lang_code', None) == getattr(item, 'lang_code', None) and
-                    getattr(queued_item, 'speed', None) == getattr(item, 'speed', None) and
-                    getattr(queued_item, 'voice', None) == getattr(item, 'voice', None) and
-                    getattr(queued_item, 'save_option', None) == getattr(item, 'save_option', None) and
-                    getattr(queued_item, 'output_folder', None) == getattr(item, 'output_folder', None) and
-                    getattr(queued_item, 'subtitle_mode', None) == getattr(item, 'subtitle_mode', None) and
-                    getattr(queued_item, 'output_format', None) == getattr(item, 'output_format', None) and
-                    getattr(queued_item, 'total_char_count', None) == getattr(item, 'total_char_count', None) and
-                    getattr(queued_item, 'replace_single_newlines', False) == getattr(item, 'replace_single_newlines', False)
+                    getattr(queued_item, "file_name", None)
+                    == getattr(item, "file_name", None)
+                    and getattr(queued_item, "lang_code", None)
+                    == getattr(item, "lang_code", None)
+                    and getattr(queued_item, "speed", None)
+                    == getattr(item, "speed", None)
+                    and getattr(queued_item, "voice", None)
+                    == getattr(item, "voice", None)
+                    and getattr(queued_item, "save_option", None)
+                    == getattr(item, "save_option", None)
+                    and getattr(queued_item, "output_folder", None)
+                    == getattr(item, "output_folder", None)
+                    and getattr(queued_item, "subtitle_mode", None)
+                    == getattr(item, "subtitle_mode", None)
+                    and getattr(queued_item, "output_format", None)
+                    == getattr(item, "output_format", None)
+                    and getattr(queued_item, "total_char_count", None)
+                    == getattr(item, "total_char_count", None)
+                    and getattr(queued_item, "replace_single_newlines", False)
+                    == getattr(item, "replace_single_newlines", False)
                 ):
                     is_duplicate = True
                     break
@@ -369,7 +415,7 @@ class QueueManager(QDialog):
             QMessageBox.warning(
                 self,
                 "Duplicate Item(s)",
-                f"Skipping {len(duplicates)} file(s) with the same attributes, already in the queue."
+                f"Skipping {len(duplicates)} file(s) with the same attributes, already in the queue.",
             )
         self.process_queue()
         self.update_button_states()
@@ -377,20 +423,23 @@ class QueueManager(QDialog):
     def add_more_files(self):
         from PyQt5.QtWidgets import QFileDialog
         from abogen.utils import calculate_text_length  # import the function
+
         # Only allow .txt files
-        files, _ = QFileDialog.getOpenFileNames(self, "Select .txt files", "", "Text Files (*.txt)")
+        files, _ = QFileDialog.getOpenFileNames(
+            self, "Select .txt files", "", "Text Files (*.txt)"
+        )
         if not files:
             return
         self.add_files_from_paths(files)
 
     def resizeEvent(self, event):
         super().resizeEvent(event)
-        if hasattr(self, 'empty_overlay'):
+        if hasattr(self, "empty_overlay"):
             self.empty_overlay.resize(self.listwidget.size())
 
     def update_button_states(self):
         # Enable Remove if at least one item is selected, else disable
-        if hasattr(self, 'remove_button'):
+        if hasattr(self, "remove_button"):
             selected_count = len(self.listwidget.selectedItems())
             self.remove_button.setEnabled(selected_count > 0)
             if selected_count > 1:
@@ -398,7 +447,7 @@ class QueueManager(QDialog):
             else:
                 self.remove_button.setText("Remove selected")
         # Disable Clear if queue is empty
-        if hasattr(self, 'clear_button'):
+        if hasattr(self, "clear_button"):
             self.clear_button.setEnabled(bool(self.queue))
 
     def show_context_menu(self, pos):
@@ -406,6 +455,7 @@ class QueueManager(QDialog):
         from PyQt5.QtGui import QDesktopServices
         from PyQt5.QtCore import QUrl
         import os
+
         global_pos = self.listwidget.viewport().mapToGlobal(pos)
         selected_items = self.listwidget.selectedItems()
         menu = QMenu(self)
@@ -417,35 +467,45 @@ class QueueManager(QDialog):
 
             # Add Open file action
             open_file_action = QAction("Open file", self)
+
             def open_file():
                 from PyQt5.QtWidgets import QMessageBox
+
                 item = selected_items[0]
                 display_name = item.text()
                 for q in self.queue:
                     if os.path.basename(q.file_name) == display_name:
                         if not os.path.exists(q.file_name):
-                            QMessageBox.warning(self, "File Not Found", f"The file does not exist.")
+                            QMessageBox.warning(
+                                self, "File Not Found", f"The file does not exist."
+                            )
                             return
                         QDesktopServices.openUrl(QUrl.fromLocalFile(q.file_name))
                         break
+
             open_file_action.triggered.connect(open_file)
             menu.addAction(open_file_action)
 
             # Add Go to folder action
             go_to_folder_action = QAction("Go to folder", self)
+
             def go_to_folder():
                 from PyQt5.QtWidgets import QMessageBox
+
                 item = selected_items[0]
                 display_name = item.text()
                 for q in self.queue:
                     if os.path.basename(q.file_name) == display_name:
                         if not os.path.exists(q.file_name):
-                            QMessageBox.warning(self, "File Not Found", f"The file does not exist.")
+                            QMessageBox.warning(
+                                self, "File Not Found", f"The file does not exist."
+                            )
                             return
                         folder = os.path.dirname(q.file_name)
                         if os.path.exists(folder):
                             QDesktopServices.openUrl(QUrl.fromLocalFile(folder))
                         break
+
             go_to_folder_action.triggered.connect(go_to_folder)
             menu.addAction(go_to_folder_action)
 
@@ -466,6 +526,7 @@ class QueueManager(QDialog):
     def reject(self):
         # Cancel: restore original queue
         from PyQt5.QtWidgets import QMessageBox
+
         # Warn if user changed a lot (e.g., more than 1 items difference)
         original_count = len(self._original_queue)
         current_count = len(self.queue)
@@ -475,7 +536,7 @@ class QueueManager(QDialog):
                 "Confirm Cancel",
                 f"Are you sure you want to cancel and discard all changes?",
                 QMessageBox.Yes | QMessageBox.No,
-                QMessageBox.No
+                QMessageBox.No,
             )
             if reply != QMessageBox.Yes:
                 return
@@ -485,6 +546,7 @@ class QueueManager(QDialog):
 
     def keyPressEvent(self, event):
         from PyQt5.QtCore import Qt
+
         if event.key() == Qt.Key_Delete:
             self.remove_item()
         else:

abogen/queued_item.py

@@ -1,6 +1,7 @@
 # represents a queued item - book, chapters, voice, etc.
 from dataclasses import dataclass
 
+
 @dataclass
 class QueuedItem:
     file_name: str

abogen/utils.py

@@ -105,15 +105,17 @@ def clean_text(text, *args, **kwargs):
 
 default_encoding = sys.getfilesystemencoding()
 
+
 def create_process(cmd, stdin=None, text=True, capture_output=False):
     import logging
+
     logger = logging.getLogger(__name__)
 
     # Configure root logger to output to console if not already configured
     root = logging.getLogger()
     if not root.handlers:
         handler = logging.StreamHandler(sys.stdout)
-        formatter = logging.Formatter('%(message)s')
+        formatter = logging.Formatter("%(message)s")
         handler.setFormatter(formatter)
         root.addHandler(handler)
         root.setLevel(logging.INFO)
@@ -156,6 +158,7 @@ def create_process(cmd, stdin=None, text=True, capture_output=False):
 
     # Stream output to console in real-time if not capturing
     if proc.stdout and not capture_output:
+
         def _stream_output(stream):
             if text:
                 # For text mode, read character by character for real-time output
@@ -174,7 +177,9 @@ def create_process(cmd, stdin=None, text=True, capture_output=False):
                         break
                     try:
                         # Try to decode binary data for display
-                        sys.stdout.write(chunk.decode(default_encoding, errors='replace'))
+                        sys.stdout.write(
+                            chunk.decode(default_encoding, errors="replace")
+                        )
                         sys.stdout.flush()
                     except Exception:
                         pass
@@ -220,6 +225,7 @@ def get_gpu_acceleration(enabled):
     try:
         import torch
         from torch.cuda import is_available
+
         if not enabled:
             return "CUDA GPU available but using CPU.", False
         if is_available():
@@ -227,7 +233,11 @@ def get_gpu_acceleration(enabled):
         # Gather more diagnostic info if CUDA is not available
         try:
             cuda_devices = torch.cuda.device_count()
-            cuda_error = torch.cuda.get_device_name(0) if cuda_devices > 0 else "No devices found"
+            cuda_error = (
+                torch.cuda.get_device_name(0)
+                if cuda_devices > 0
+                else "No devices found"
+            )
         except Exception as e:
             cuda_error = str(e)
         return f"CUDA GPU is not available. Using CPU. ({cuda_error})", False
@@ -239,6 +249,7 @@ def prevent_sleep_start():
     system = platform.system()
     if system == "Windows":
         import ctypes
+
         ctypes.windll.kernel32.SetThreadExecutionState(
             0x80000000 | 0x00000001 | 0x00000040
         )
@@ -246,19 +257,22 @@ def prevent_sleep_start():
         _sleep_procs["Darwin"] = create_process(["caffeinate"])
     elif system == "Linux":
         # use a sleep that never exits so inhibition stays active
-        _sleep_procs["Linux"] = create_process([
+        _sleep_procs["Linux"] = create_process(
+            [
                 "systemd-inhibit",
                 "--what=handle-lid-switch:sleep",
                 "--mode=block",
                 "sleep",
                 "infinity",
-        ])
+            ]
+        )
 
 
 def prevent_sleep_end():
     system = platform.system()
     if system == "Windows":
         import ctypes
+
         ctypes.windll.kernel32.SetThreadExecutionState(0x80000000)  # ES_CONTINUOUS
     elif system in ("Darwin", "Linux") and _sleep_procs[system]:
         try:

abogen/voice_formula_gui.py

@@ -230,13 +230,15 @@ class VoiceMixer(QWidget):
             appstyle = QApplication.instance().style().objectName().lower()
             if appstyle != "windowsvista":
                 # Set custom groove color for disabled state using COLORS["GREY_BACKGROUND"]
-                self.slider.setStyleSheet(f"""
+                self.slider.setStyleSheet(
+                    f"""
                     QSlider::groove:vertical:disabled {{
                         background: {COLORS.get("GREY_BACKGROUND")};
                         width: 4px;
                         border-radius: 4px;
                     }}
-                """)
+                """
+                )
 
         # Connect controls
         self.slider.valueChanged.connect(lambda val: self.spin_box.setValue(val / 100))
@@ -330,7 +332,9 @@ class VoiceFormulaDialog(QDialog):
         self._original_mixed_voice_state = None
         if parent is not None:
             self._original_profile_name = getattr(parent, "selected_profile_name", None)
-            self._original_mixed_voice_state = getattr(parent, "mixed_voice_state", None)
+            self._original_mixed_voice_state = getattr(
+                parent, "mixed_voice_state", None
+            )
         profiles = load_profiles()
         self._virtual_new_profile = False
         if not profiles:
@@ -369,7 +373,9 @@ class VoiceFormulaDialog(QDialog):
         self.profile_list = QListWidget()
         self.profile_list.setSelectionMode(QListWidget.SingleSelection)
         self.profile_list.setSelectionBehavior(QListWidget.SelectRows)
-        self.profile_list.setStyleSheet("QListWidget::item:selected { background: palette(highlight); color: palette(highlighted-text); }")
+        self.profile_list.setStyleSheet(
+            "QListWidget::item:selected { background: palette(highlight); color: palette(highlighted-text); }"
+        )
         icon = QIcon(get_resource_path("abogen.assets", "profile.png"))
         if self._virtual_new_profile:
             item = QListWidgetItem(icon, "New profile")
@@ -976,6 +982,7 @@ class VoiceFormulaDialog(QDialog):
     def _parse_rgba_to_qcolor(self, rgba_str):
         from PyQt5.QtCore import Qt
         from PyQt5.QtGui import QColor
+
         """Helper to convert 'rgba(R,G,B,A_float)' string to QColor."""
         match = re.match(r"rgba\((\d+),\s*(\d+),\s*(\d+),\s*([\d.]+)\)", rgba_str)
         if match:
@@ -1372,6 +1379,7 @@ class VoiceFormulaDialog(QDialog):
 
     def update_profile_list_colors(self):
         from PyQt5.QtCore import Qt
+
         profiles = load_profiles()
         for i in range(self.profile_list.count()):
             item = self.profile_list.item(i)
@@ -1383,7 +1391,9 @@ class VoiceFormulaDialog(QDialog):
                 color = self._parse_rgba_to_qcolor(COLORS.get("YELLOW_BACKGROUND"))
                 item.setData(Qt.BackgroundRole, color)
             else:
-                item.setData(Qt.BackgroundRole, self.profile_list.palette().base().color())
+                item.setData(
+                    Qt.BackgroundRole, self.profile_list.palette().base().color()
+                )
                 weights = profiles.get(name, {}).get("voices", [])
                 total = 0
                 if isinstance(weights, list):

abogen/voice_formulas.py

@@ -1,6 +1,7 @@
 import re
 from abogen.constants import VOICES_INTERNAL
 
+
 # Calls parsing and loads the voice to gpu or cpu
 def get_new_voice(pipeline, formula, use_gpu):
     try: