Extensions performance & memory optimisations

Reworked remove_surrounded_chars() to use regular expression ( https://regexr.com/7alb5 ) instead of repeated string concatenations for elevenlab_tts, silero_tts, sd_api_pictures. This should be both faster and more robust in handling asterisks.

Reduced the memory footprint of send_pictures and sd_api_pictures by scaling the images in the chat to 300 pixels max-side wise. (The user already has the original in case of the sent picture and there's an option to save the SD generation).
This should fix history growing annoyingly large with multiple pictures present

extensions/elevenlabs_tts/script.py

@@ -4,6 +4,8 @@ import gradio as gr
 from elevenlabslib import ElevenLabsUser
 from elevenlabslib.helpers import save_bytes_to_path
 
+import re
+
 import modules.shared as shared
 
 params = {
@@ -52,14 +54,10 @@ def refresh_voices():
         return
 
 def remove_surrounded_chars(string):
-    new_string = ""
-    in_star = False
-    for char in string:
-        if char == '*':
-            in_star = not in_star
-        elif not in_star:
-            new_string += char
-    return new_string
+    # regexp is way faster than repeated string concatenation!
+    # this expression matches to 'as few symbols as possible (0 upwards) between any asterisks' OR
+    # 'as few symbols as possible (0 upwards) between an asterisk and the end of the string'
+    return re.sub('\*[^\*]*?(\*|$)','',string)
 
 def input_modifier(string):
     """

extensions/sd_api_pictures/script.py

@@ -1,5 +1,6 @@
 import base64
 import io
+import re
 from pathlib import Path
 
 import gradio as gr
@@ -31,14 +32,10 @@ picture_response = False # specifies if the next model response should appear as
 pic_id = 0
 
 def remove_surrounded_chars(string):
-    new_string = ""
-    in_star = False
-    for char in string:
-        if char == '*':
-            in_star = not in_star
-        elif not in_star:
-            new_string += char
-    return new_string
+    # regexp is way faster than repeated string concatenation!
+    # this expression matches to 'as few symbols as possible (0 upwards) between any asterisks' OR
+    # 'as few symbols as possible (0 upwards) between an asterisk and the end of the string'
+    return re.sub('\*[^\*]*?(\*|$)','',string)
 
 # I don't even need input_hijack for this as visible text will be commited to history as the unmodified string
 def input_modifier(string):
@@ -54,6 +51,8 @@ def input_modifier(string):
     mediums = ['image', 'pic', 'picture', 'photo']
     subjects = ['yourself', 'own']
     lowstr = string.lower()
+
+    # TODO: refactor out to separate handler and also replace detection with a regexp
     if any(command in lowstr for command in commands) and any(case in lowstr for case in mediums): # trigger the generation if a command signature and a medium signature is found
         picture_response = True
         shared.args.no_stream = True                                                               # Disable streaming cause otherwise the SD-generated picture would return as a dud
@@ -91,8 +90,15 @@ def get_SD_pictures(description):
             output_file = Path(f'extensions/sd_api_pictures/outputs/{pic_id:06d}.png')
             image.save(output_file.as_posix())
             pic_id += 1
-        # lower the resolution of received images for the chat, otherwise the history size gets out of control quickly with all the base64 values
-        newsize = (300, 300)
+        # lower the resolution of received images for the chat, otherwise the log size gets out of control quickly with all the base64 values in visible history
+        width, height = image.size
+        if (width > 300):
+            height = int(height * (300 / width))
+            width = 300
+        elif (height > 300):
+            width = int(width * (300 / height))
+            height = 300        
+        newsize = (width, height)
         image = image.resize(newsize, Image.LANCZOS)
         buffered = io.BytesIO()
         image.save(buffered, format="JPEG")

extensions/send_pictures/script.py

@@ -4,6 +4,7 @@ from io import BytesIO
 import gradio as gr
 import torch
 from transformers import BlipForConditionalGeneration, BlipProcessor
+from PIL import Image
 
 import modules.chat as chat
 import modules.shared as shared
@@ -25,10 +26,20 @@ def caption_image(raw_image):
 
 def generate_chat_picture(picture, name1, name2):
     text = f'*{name1} sends {name2} a picture that contains the following: "{caption_image(picture)}"*'
+    # lower the resolution of sent images for the chat, otherwise the log size gets out of control quickly with all the base64 values in visible history
+    width, height = picture.size
+    if (width > 300):
+        height = int(height * (300 / width))
+        width = 300
+    elif (height > 300):
+        width = int(width * (300 / height))
+        height = 300        
+    newsize = (width, height)
+    picture = picture.resize(newsize, Image.LANCZOS)
     buffer = BytesIO()
     picture.save(buffer, format="JPEG")
     img_str = base64.b64encode(buffer.getvalue()).decode('utf-8')
-    visible_text = f'<img src="data:image/jpeg;base64,{img_str}">'
+    visible_text = f'<img src="data:image/jpeg;base64,{img_str}" alt="{text}">'
     return text, visible_text
 
 def ui():

extensions/silero_tts/script.py

@@ -3,6 +3,7 @@ from pathlib import Path
 
 import gradio as gr
 import torch
+import re
 
 import modules.chat as chat
 import modules.shared as shared
@@ -46,14 +47,10 @@ def load_model():
 model = load_model()
 
 def remove_surrounded_chars(string):
-    new_string = ""
-    in_star = False
-    for char in string:
-        if char == '*':
-            in_star = not in_star
-        elif not in_star:
-            new_string += char
-    return new_string
+    # regexp is way faster than repeated string concatenation!
+    # this expression matches to 'as few symbols as possible (0 upwards) between any asterisks' OR
+    # 'as few symbols as possible (0 upwards) between an asterisk and the end of the string'
+    return re.sub('\*[^\*]*?(\*|$)','',string)
 
 def remove_tts_from_history(name1, name2):
     for i, entry in enumerate(shared.history['internal']):