Added a download tracker that displays informative messages

CHANGELOG.md

@@ -3,6 +3,7 @@
 - Added voice preview caching system that stores generated previews in the cache folder, mentioned by @jborza in #22
 - Added extra metadata support for chaptered M4B files, ensuring better compatibility with audiobook players.
 - Added new option: `Separate chapters audio format`, allowing to choose between `wav`, `mp4`, `flac` and `opus` formats for chaptered audio files.
+- Added a download tracker that displays informative messages while downloading Kokoro models or voices from HuggingFace.
 - Skipping PyTorch CUDA installation if GPU is not NVIDIA in WINDOWS_INSTALL.bat script, preventing unnecessary installation of PyTorch.
 - Removed `abogen_` prefix that was adding to converted books in temp directory.
 - Fixed voice preview player keeps playing silently at the background after preview ends.

abogen/conversion.py

@@ -12,6 +12,7 @@ import soundfile as sf
 from utils import clean_text, create_process
 from constants import PROGRAM_NAME, LANGUAGE_DESCRIPTIONS, SAMPLE_VOICE_TEXTS
 from voice_formulas import get_new_voice
+import hf_tracker
 import static_ffmpeg
 import threading  # for efficient waiting
 import subprocess
@@ -161,6 +162,7 @@ class ConversionThread(QThread):
             f"\nVoice: {self.voice}\nLanguage: {self.lang_code}\nSpeed: {self.speed}\nGPU: {self.use_gpu}\nFile: {self.file_name}\nSubtitle mode: {self.subtitle_mode}\nOutput format: {self.output_format}\nSave option: {self.save_option}\n"
         )
         try:
+            hf_tracker.set_log_callback(lambda msg: self.log_updated.emit(msg))
             # Show configuration
             self.log_updated.emit("Configuration:")
             # Use display_path for logs if available, otherwise use the actual file name
@@ -1003,6 +1005,7 @@ class PlayAudioThread(QThread):
     def __init__(self, wav_path, parent=None):
         super().__init__(parent)
         self.wav_path = wav_path
+        self.is_canceled = False
 
     def run(self):
         try:
@@ -1012,11 +1015,37 @@ class PlayAudioThread(QThread):
             pygame.mixer.init()
             pygame.mixer.music.load(self.wav_path)
             pygame.mixer.music.play()
-            # Wait until playback is finished
+            # Wait until playback is finished or canceled
-            while pygame.mixer.music.get_busy():
+            while pygame.mixer.music.get_busy() and not self.is_canceled:
                 _time.sleep(0.2)
+                
+            # Make sure to clean up regardless of how we exited the loop
+            try:
+                pygame.mixer.music.stop()
                 pygame.mixer.music.unload()
                 pygame.mixer.quit()  # Quit the mixer
+            except Exception:
+                # Ignore any errors during cleanup
+                pass
+                
             self.finished.emit()
         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")
+            else:
                 self.error.emit(f"Audio playback error: {str(e)}")
+            
+    def stop(self):
+        """Safely stop playback"""
+        self.is_canceled = True
+        # 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()
+                pygame.mixer.music.unload()
+        except Exception:
+            # Ignore all errors when stopping since mixer might not be initialized
+            pass

abogen/gui.py

@@ -4,6 +4,7 @@ import tempfile
 import platform
 import base64
 import re
+import hf_tracker
 import hashlib  # Added for cache path generation
 from PyQt5.QtWidgets import (
     QApplication,
@@ -80,6 +81,13 @@ if platform.system() == "Windows":
     import ctypes
 
 
+class ShowWarningSignalEmitter(QObject):  # New class to handle signal emission
+    show_warning_signal = pyqtSignal(str, str)
+
+    def emit(self, title, message):
+        self.show_warning_signal.emit(title, message)
+
+
 class ThreadSafeLogSignal(QObject):
     log_signal = pyqtSignal(object)
 
@@ -533,6 +541,11 @@ class abogen(QWidget):
         self.log_signal = ThreadSafeLogSignal()
         self.log_signal.log_signal.connect(self._update_log_main_thread)
 
+        # Create warning signal emitter
+        self.warning_signal_emitter = ShowWarningSignalEmitter()
+        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
         icon_path = get_resource_path("abogen.assets", "icon.ico")
         if icon_path:
@@ -584,6 +597,9 @@ class abogen(QWidget):
         if self.check_updates:
             QTimer.singleShot(1000, self.check_for_updates_startup)
 
+        # Set hf_tracker callbacks
+        hf_tracker.set_log_callback(self.update_log)
+
     def initUI(self):
         self.setWindowTitle(f"{PROGRAM_NAME} v{VERSION}")
         screen = QApplication.primaryScreen().geometry()
@@ -1571,14 +1587,8 @@ class abogen(QWidget):
         if self.preview_playing:
             try:
                 if self.play_audio_thread and self.play_audio_thread.isRunning():
-                    # Attempt to stop pygame mixer if it's in use by PlayAudioThread
+                    # Call the stop method on PlayAudioThread to safely handle stopping
-                    # This is a bit indirect, ideally PlayAudioThread would have a stop method
+                    self.play_audio_thread.stop()
-                    import pygame
-                    if pygame.mixer.get_init() and pygame.mixer.music.get_busy():
-                        pygame.mixer.music.stop()
-                        pygame.mixer.music.unload()  # Ensure it's unloaded
-                        pygame.mixer.quit()  # Quit the mixer
-                    self.play_audio_thread.quit()  # Ask thread to finish
                     self.play_audio_thread.wait(500)  # Wait a bit
             except Exception as e:
                 print(f"Error stopping preview audio: {e}")
@@ -2428,3 +2438,6 @@ Categories=AudioVideo;Audio;Utility;
         self.config["separate_chapters_format"] = fmt
         save_config(self.config)
 
+    def show_model_download_warning(self, title, message):
+        QMessageBox.information(self, title, message)
+

abogen/hf_tracker.py

@@ -0,0 +1,36 @@
+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)
+        local_kwargs["local_files_only"] = True
+        hf_hub_download(*args, **local_kwargs)
+    except Exception:
+        repo_id = kwargs.get("repo_id", "<unknown repo>")
+        filename = kwargs.get("filename", "<unknown file>")
+        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.")
+        else:
+            msg = f"\nDownloading '{filename}' from Hugging Face ({repo_id}). Please wait..."
+        if log_callback:
+            print(msg, flush=True)
+            log_callback(msg)
+        else:
+            print(msg, flush=True)
+    return hf_hub_download(*args, **kwargs)
+
+import huggingface_hub
+huggingface_hub.hf_hub_download = tracked_hf_hub_download