添加 ItemInfoBox 和 PrimaryItemBox 类，更新 HEICFile 类以支持提取主图像 ID 和列出可用项

main.py

@@ -1,28 +1,23 @@
+# In main.py
 from heic_file import HEICFile
 
-def main():
-    print("--- Processing Samsung HEIC file ---")
-    samsung_heic = HEICFile('samsung.heic')
-    samsung_video_data = samsung_heic.get_motion_photo_data()
+def analyze_file(filename: str):
+    print(f"--- Analyzing {filename} ---")
+    heic_file = HEICFile(filename)
+    
+    # List all available items in the file
+    heic_file.list_items()
+    
+    # Get the ID of the primary image
+    primary_id = heic_file.get_primary_item_id()
+    if primary_id:
+        print(f"\nThe primary item ID is: {primary_id}")
     
-    if samsung_video_data:
-        output_filename = 'samsung_motion_photo.mp4'
-        with open(output_filename, 'wb') as f:
-            f.write(samsung_video_data)
-        print(f"Successfully extracted motion photo to '{output_filename}' ({len(samsung_video_data)} bytes)")
-
     print("\n" + "="*40 + "\n")
 
-    print("--- Processing Apple HEIC file ---")
-    apple_heic = HEICFile('apple.heic')
-    apple_video_data = apple_heic.get_motion_photo_data()
-
-    if apple_video_data:
-        # This block should not be reached for Apple files
-        print("Extracted embedded video from Apple file (this is unexpected).")
-    else:
-        print("No embedded motion photo found in Apple file, as expected.")
-
+def main():
+    analyze_file('apple.heic')
+    analyze_file('samsung.heic')
 
 if __name__ == "__main__":
     main()