Holy $hit.

Yep.

Fix gfpgan_model_arch requirement(s).
Add Upscaler base class, move from images.
Add a lot of methods to Upscaler.
Re-work all the child upscalers to be proper classes.
Add BSRGAN scaler.
Add ldsr_model_arch class, removing the dependency for another repo that just uses regular latent-diffusion stuff.
Add one universal method that will always find and load new upscaler models without having to add new "setup_model" calls. Still need to add command line params, but that could probably be automated.
Add a "self.scale" property to all Upscalers so the scalers themselves can do "things" in response to the requested upscaling size.
Ensure LDSR doesn't get stuck in a longer loop of "upscale/downscale/upscale" as we try to reach the target upscale size.
Add typehints for IDE sanity.
PEP-8 improvements.
Moar.

launch.py

 # this scripts installs necessary requirements and launches main program in webui.py
-
+import shutil
 import subprocess
 import os
 import sys
@@ -22,7 +22,6 @@ stable_diffusion_commit_hash = os.environ.get('STABLE_DIFFUSION_COMMIT_HASH', "6
 taming_transformers_commit_hash = os.environ.get('TAMING_TRANSFORMERS_COMMIT_HASH', "24268930bf1dce879235a7fddd0b2355b84d7ea6")
 codeformer_commit_hash = os.environ.get('CODEFORMER_COMMIT_HASH', "c5b4593074ba6214284d6acd5f1719b6c5d739af")
 blip_commit_hash = os.environ.get('BLIP_COMMIT_HASH', "48211a1594f1321b00f14c9f7a5b4813144b2fb9")
-ldsr_commit_hash = os.environ.get('LDSR_COMMIT_HASH',"abf33e7002d59d9085081bce93ec798dcabd49af")
 
 args = shlex.split(commandline_args)
 
@@ -122,9 +121,11 @@ git_clone("https://github.com/CompVis/stable-diffusion.git", repo_dir('stable-di
 git_clone("https://github.com/CompVis/taming-transformers.git", repo_dir('taming-transformers'), "Taming Transformers", taming_transformers_commit_hash)
 git_clone("https://github.com/sczhou/CodeFormer.git", repo_dir('CodeFormer'), "CodeFormer", codeformer_commit_hash)
 git_clone("https://github.com/salesforce/BLIP.git", repo_dir('BLIP'), "BLIP", blip_commit_hash)
-# Using my repo until my changes are merged, as this makes interfacing with our version of SD-web a lot easier
-git_clone("https://github.com/Hafiidz/latent-diffusion", repo_dir('latent-diffusion'), "LDSR", ldsr_commit_hash)
-
+if os.path.isdir(repo_dir('latent-diffusion')):
+    try:
+        shutil.rmtree(repo_dir('latent-diffusion'))
+    except:
+        pass
 if not is_installed("lpips"):
     run_pip(f"install -r {os.path.join(repo_dir('CodeFormer'), 'requirements.txt')}", "requirements for CodeFormer")
 

modules/bsrgan_model.py

+import os.path
+import sys
+import traceback
+
+import PIL.Image
+import numpy as np
+import torch
+from basicsr.utils.download_util import load_file_from_url
+
+import modules.upscaler
+from modules import shared, modelloader
+from modules.bsrgan_model_arch import RRDBNet
+from modules.paths import models_path
+
+
+class UpscalerBSRGAN(modules.upscaler.Upscaler):
+    def __init__(self, dirname):
+        self.name = "BSRGAN"
+        self.model_path = os.path.join(models_path, self.name)
+        self.model_name = "BSRGAN 4x"
+        self.model_url = "https://github.com/cszn/KAIR/releases/download/v1.0/BSRGAN.pth"
+        self.user_path = dirname
+        super().__init__()
+        model_paths = self.find_models(ext_filter=[".pt", ".pth"])
+        scalers = []
+        if len(model_paths) == 0:
+            scaler_data = modules.upscaler.UpscalerData(self.model_name, self.model_url, self, 4)
+            scalers.append(scaler_data)
+        for file in model_paths:
+            if "http" in file:
+                name = self.model_name
+            else:
+                name = modelloader.friendly_name(file)
+            try:
+                scaler_data = modules.upscaler.UpscalerData(name, file, self, 4)
+                scalers.append(scaler_data)
+            except Exception:
+                print(f"Error loading BSRGAN model: {file}", file=sys.stderr)
+                print(traceback.format_exc(), file=sys.stderr)
+        self.scalers = scalers
+
+    def do_upscale(self, img: PIL.Image, selected_file):
+        torch.cuda.empty_cache()
+        model = self.load_model(selected_file)
+        if model is None:
+            return img
+        model.to(shared.device)
+        torch.cuda.empty_cache()
+        img = np.array(img)
+        img = img[:, :, ::-1]
+        img = np.moveaxis(img, 2, 0) / 255
+        img = torch.from_numpy(img).float()
+        img = img.unsqueeze(0).to(shared.device)
+        with torch.no_grad():
+            output = model(img)
+        output = output.squeeze().float().cpu().clamp_(0, 1).numpy()
+        output = 255. * np.moveaxis(output, 0, 2)
+        output = output.astype(np.uint8)
+        output = output[:, :, ::-1]
+        torch.cuda.empty_cache()
+        return PIL.Image.fromarray(output, 'RGB')
+
+    def load_model(self, path: str):
+        if "http" in path:
+            filename = load_file_from_url(url=self.model_url, model_dir=self.model_path, file_name="%s.pth" % self.name,
+                                          progress=True)
+        else:
+            filename = path
+        if not os.path.exists(filename) or filename is None:
+            print("Unable to load %s from %s" % (self.model_dir, filename))
+            return None
+        print("Loading %s from %s" % (self.model_dir, filename))
+        model = RRDBNet(in_nc=3, out_nc=3, nf=64, nb=23, gc=32, sf=2)  # define network
+        model.load_state_dict(torch.load(filename), strict=True)
+        model.eval()
+        for k, v in model.named_parameters():
+            v.requires_grad = False
+        return model
+

modules/bsrgan_model_arch.py

+import functools
+import torch
+import torch.nn as nn
+import torch.nn.functional as F
+import torch.nn.init as init
+
+
+def initialize_weights(net_l, scale=1):
+    if not isinstance(net_l, list):
+        net_l = [net_l]
+    for net in net_l:
+        for m in net.modules():
+            if isinstance(m, nn.Conv2d):
+                init.kaiming_normal_(m.weight, a=0, mode='fan_in')
+                m.weight.data *= scale  # for residual block
+                if m.bias is not None:
+                    m.bias.data.zero_()
+            elif isinstance(m, nn.Linear):
+                init.kaiming_normal_(m.weight, a=0, mode='fan_in')
+                m.weight.data *= scale
+                if m.bias is not None:
+                    m.bias.data.zero_()
+            elif isinstance(m, nn.BatchNorm2d):
+                init.constant_(m.weight, 1)
+                init.constant_(m.bias.data, 0.0)
+
+
+def make_layer(block, n_layers):
+    layers = []
+    for _ in range(n_layers):
+        layers.append(block())
+    return nn.Sequential(*layers)
+
+
+class ResidualDenseBlock_5C(nn.Module):
+    def __init__(self, nf=64, gc=32, bias=True):
+        super(ResidualDenseBlock_5C, self).__init__()
+        # gc: growth channel, i.e. intermediate channels
+        self.conv1 = nn.Conv2d(nf, gc, 3, 1, 1, bias=bias)
+        self.conv2 = nn.Conv2d(nf + gc, gc, 3, 1, 1, bias=bias)
+        self.conv3 = nn.Conv2d(nf + 2 * gc, gc, 3, 1, 1, bias=bias)
+        self.conv4 = nn.Conv2d(nf + 3 * gc, gc, 3, 1, 1, bias=bias)
+        self.conv5 = nn.Conv2d(nf + 4 * gc, nf, 3, 1, 1, bias=bias)
+        self.lrelu = nn.LeakyReLU(negative_slope=0.2, inplace=True)
+
+        # initialization
+        initialize_weights([self.conv1, self.conv2, self.conv3, self.conv4, self.conv5], 0.1)
+
+    def forward(self, x):
+        x1 = self.lrelu(self.conv1(x))
+        x2 = self.lrelu(self.conv2(torch.cat((x, x1), 1)))
+        x3 = self.lrelu(self.conv3(torch.cat((x, x1, x2), 1)))
+        x4 = self.lrelu(self.conv4(torch.cat((x, x1, x2, x3), 1)))
+        x5 = self.conv5(torch.cat((x, x1, x2, x3, x4), 1))
+        return x5 * 0.2 + x
+
+
+class RRDB(nn.Module):
+    '''Residual in Residual Dense Block'''
+
+    def __init__(self, nf, gc=32):
+        super(RRDB, self).__init__()
+        self.RDB1 = ResidualDenseBlock_5C(nf, gc)
+        self.RDB2 = ResidualDenseBlock_5C(nf, gc)
+        self.RDB3 = ResidualDenseBlock_5C(nf, gc)
+
+    def forward(self, x):
+        out = self.RDB1(x)
+        out = self.RDB2(out)
+        out = self.RDB3(out)
+        return out * 0.2 + x
+
+
+class RRDBNet(nn.Module):
+    def __init__(self, in_nc=3, out_nc=3, nf=64, nb=23, gc=32, sf=4):
+        super(RRDBNet, self).__init__()
+        RRDB_block_f = functools.partial(RRDB, nf=nf, gc=gc)
+        self.sf = sf
+        print([in_nc, out_nc, nf, nb, gc, sf])
+
+        self.conv_first = nn.Conv2d(in_nc, nf, 3, 1, 1, bias=True)
+        self.RRDB_trunk = make_layer(RRDB_block_f, nb)
+        self.trunk_conv = nn.Conv2d(nf, nf, 3, 1, 1, bias=True)
+        #### upsampling
+        self.upconv1 = nn.Conv2d(nf, nf, 3, 1, 1, bias=True)
+        if self.sf==4:
+            self.upconv2 = nn.Conv2d(nf, nf, 3, 1, 1, bias=True)
+        self.HRconv = nn.Conv2d(nf, nf, 3, 1, 1, bias=True)
+        self.conv_last = nn.Conv2d(nf, out_nc, 3, 1, 1, bias=True)
+
+        self.lrelu = nn.LeakyReLU(negative_slope=0.2, inplace=True)
+
+    def forward(self, x):
+        fea = self.conv_first(x)
+        trunk = self.trunk_conv(self.RRDB_trunk(fea))
+        fea = fea + trunk
+
+        fea = self.lrelu(self.upconv1(F.interpolate(fea, scale_factor=2, mode='nearest')))
+        if self.sf==4:
+            fea = self.lrelu(self.upconv2(F.interpolate(fea, scale_factor=2, mode='nearest')))
+        out = self.conv_last(self.lrelu(self.HRconv(fea)))
+
+        return out
\ No newline at end of file

modules/extras.py

@@ -66,29 +66,28 @@ def run_extras(extras_mode, image, image_folder, gfpgan_visibility, codeformer_v
             info += f"CodeFormer w: {round(codeformer_weight, 2)}, CodeFormer visibility:{round(codeformer_visibility, 2)}\n"
             image = res
 
-        if upscaling_resize != 1.0:
-            def upscale(image, scaler_index, resize):
-                small = image.crop((image.width // 2, image.height // 2, image.width // 2 + 10, image.height // 2 + 10))
-                pixels = tuple(np.array(small).flatten().tolist())
-                key = (resize, scaler_index, image.width, image.height, gfpgan_visibility, codeformer_visibility, codeformer_weight) + pixels
+        def upscale(image, scaler_index, resize):
+            small = image.crop((image.width // 2, image.height // 2, image.width // 2 + 10, image.height // 2 + 10))
+            pixels = tuple(np.array(small).flatten().tolist())
+            key = (resize, scaler_index, image.width, image.height, gfpgan_visibility, codeformer_visibility, codeformer_weight) + pixels
 
-                c = cached_images.get(key)
-                if c is None:
-                    upscaler = shared.sd_upscalers[scaler_index]
-                    c = upscaler.upscale(image, image.width * resize, image.height * resize)
-                    cached_images[key] = c
+            c = cached_images.get(key)
+            if c is None:
+                upscaler = shared.sd_upscalers[scaler_index]
+                c = upscaler.scaler.upscale(image, resize, upscaler.data_path)
+                cached_images[key] = c
 
-                return c
+            return c
 
-            info += f"Upscale: {round(upscaling_resize, 3)}, model:{shared.sd_upscalers[extras_upscaler_1].name}\n"
-            res = upscale(image, extras_upscaler_1, upscaling_resize)
+        info += f"Upscale: {round(upscaling_resize, 3)}, model:{shared.sd_upscalers[extras_upscaler_1].name}\n"
+        res = upscale(image, extras_upscaler_1, upscaling_resize)
 
-            if extras_upscaler_2 != 0 and extras_upscaler_2_visibility > 0:
-                res2 = upscale(image, extras_upscaler_2, upscaling_resize)
-                info += f"Upscale: {round(upscaling_resize, 3)}, visibility: {round(extras_upscaler_2_visibility, 3)}, model:{shared.sd_upscalers[extras_upscaler_2].name}\n"
-                res = Image.blend(res, res2, extras_upscaler_2_visibility)
+        if extras_upscaler_2 != 0 and extras_upscaler_2_visibility > 0:
+            res2 = upscale(image, extras_upscaler_2, upscaling_resize)
+            info += f"Upscale: {round(upscaling_resize, 3)}, visibility: {round(extras_upscaler_2_visibility, 3)}, model:{shared.sd_upscalers[extras_upscaler_2].name}\n"
+            res = Image.blend(res, res2, extras_upscaler_2_visibility)
 
-            image = res
+        image = res
 
         while len(cached_images) > 2:
             del cached_images[next(iter(cached_images.keys()))]

modules/gfpgan_model.py

 import os
 import sys
 import traceback
-from glob import glob
 
-from modules import shared, devices
-from modules.shared import cmd_opts
-from modules.paths import script_path
+import facexlib
+import gfpgan
+
 import modules.face_restoration
 from modules import shared, devices, modelloader
 from modules.paths import models_path
 
 model_dir = "GFPGAN"
-cmd_dir = None
+user_path = None
 model_path = os.path.join(models_path, model_dir)
 model_url = "https://github.com/TencentARC/GFPGAN/releases/download/v1.3.0/GFPGANv1.4.pth"
-
+have_gfpgan = False
 loaded_gfpgan_model = None
 
 
-def gfpgan():
+def gfpgann():
     global loaded_gfpgan_model
     global model_path
     if loaded_gfpgan_model is not None:
@@ -28,14 +27,16 @@ def gfpgan():
     if gfpgan_constructor is None:
         return None
 
-    models = modelloader.load_models(model_path, model_url, cmd_dir)
-    if len(models) != 0:
+    models = modelloader.load_models(model_path, model_url, user_path, ext_filter="GFPGAN")
+    if len(models) == 1 and "http" in models[0]:
+        model_file = models[0]
+    elif len(models) != 0:
         latest_file = max(models, key=os.path.getctime)
         model_file = latest_file
     else:
         print("Unable to load gfpgan model!")
         return None
-    model = gfpgan_constructor(model_path=model_file, model_dir=model_path, upscale=1, arch='clean', channel_multiplier=2,
+    model = gfpgan_constructor(model_path=model_file, upscale=1, arch='clean', channel_multiplier=2,
                                bg_upsampler=None)
     model.gfpgan.to(shared.device)
     loaded_gfpgan_model = model
@@ -44,11 +45,12 @@ def gfpgan():
 
 
 def gfpgan_fix_faces(np_image):
-    model = gfpgan()
+    model = gfpgann()
     if model is None:
         return np_image
     np_image_bgr = np_image[:, :, ::-1]
-    cropped_faces, restored_faces, gfpgan_output_bgr = model.enhance(np_image_bgr, has_aligned=False, only_center_face=False, paste_back=True)
+    cropped_faces, restored_faces, gfpgan_output_bgr = model.enhance(np_image_bgr, has_aligned=False,
+                                                                     only_center_face=False, paste_back=True)
     np_image = gfpgan_output_bgr[:, :, ::-1]
 
     if shared.opts.face_restoration_unload:
@@ -57,7 +59,6 @@ def gfpgan_fix_faces(np_image):
     return np_image
 
 
-have_gfpgan = False
 gfpgan_constructor = None
 
 
@@ -67,14 +68,33 @@ def setup_model(dirname):
         os.makedirs(model_path)
 
     try:
-        from modules.gfpgan_model_arch import GFPGANerr
-        global cmd_dir
+        from gfpgan import GFPGANer
+        from facexlib import detection, parsing
+        global user_path
         global have_gfpgan
         global gfpgan_constructor
 
-        cmd_dir = dirname
+        load_file_from_url_orig = gfpgan.utils.load_file_from_url
+        facex_load_file_from_url_orig = facexlib.detection.load_file_from_url
+        facex_load_file_from_url_orig2 = facexlib.parsing.load_file_from_url
+
+        def my_load_file_from_url(**kwargs):
+            print("Setting model_dir to " + model_path)
+            return load_file_from_url_orig(**dict(kwargs, model_dir=model_path))
+
+        def facex_load_file_from_url(**kwargs):
+            return facex_load_file_from_url_orig(**dict(kwargs, save_dir=model_path, model_dir=None))
+
+        def facex_load_file_from_url2(**kwargs):
+            return facex_load_file_from_url_orig2(**dict(kwargs, save_dir=model_path, model_dir=None))
+
+        gfpgan.utils.load_file_from_url = my_load_file_from_url
+        facexlib.detection.load_file_from_url = facex_load_file_from_url
+        facexlib.parsing.load_file_from_url = facex_load_file_from_url2
+        user_path = dirname
+        print("Have gfpgan should be true?")
         have_gfpgan = True
-        gfpgan_constructor = GFPGANerr
+        gfpgan_constructor = GFPGANer
 
         class FaceRestorerGFPGAN(modules.face_restoration.FaceRestoration):
             def name(self):
@@ -82,7 +102,9 @@ def setup_model(dirname):
 
             def restore(self, np_image):
                 np_image_bgr = np_image[:, :, ::-1]
-                cropped_faces, restored_faces, gfpgan_output_bgr = gfpgan().enhance(np_image_bgr, has_aligned=False, only_center_face=False, paste_back=True)
+                cropped_faces, restored_faces, gfpgan_output_bgr = gfpgann().enhance(np_image_bgr, has_aligned=False,
+                                                                                     only_center_face=False,
+                                                                                     paste_back=True)
                 np_image = gfpgan_output_bgr[:, :, ::-1]
 
                 return np_image

modules/gfpgan_model_arch.py

-# GFPGAN likes to download stuff "wherever", and we're trying to fix that, so this is a copy of the original...
-
-import cv2
-import os
-import torch
-from basicsr.utils import img2tensor, tensor2img
-from basicsr.utils.download_util import load_file_from_url
-from facexlib.utils.face_restoration_helper import FaceRestoreHelper
-from torchvision.transforms.functional import normalize
-
-from gfpgan.archs.gfpgan_bilinear_arch import GFPGANBilinear
-from gfpgan.archs.gfpganv1_arch import GFPGANv1
-from gfpgan.archs.gfpganv1_clean_arch import GFPGANv1Clean
-
-ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-
-
-class GFPGANerr():
-    """Helper for restoration with GFPGAN.
-
-    It will detect and crop faces, and then resize the faces to 512x512.
-    GFPGAN is used to restored the resized faces.
-    The background is upsampled with the bg_upsampler.
-    Finally, the faces will be pasted back to the upsample background image.
-
-    Args:
-        model_path (str): The path to the GFPGAN model. It can be urls (will first download it automatically).
-        upscale (float): The upscale of the final output. Default: 2.
-        arch (str): The GFPGAN architecture. Option: clean | original. Default: clean.
-        channel_multiplier (int): Channel multiplier for large networks of StyleGAN2. Default: 2.
-        bg_upsampler (nn.Module): The upsampler for the background. Default: None.
-    """
-
-    def __init__(self, model_path, model_dir, upscale=2, arch='clean', channel_multiplier=2, bg_upsampler=None, device=None):
-        self.upscale = upscale
-        self.bg_upsampler = bg_upsampler
-
-        # initialize model
-        self.device = torch.device('cuda' if torch.cuda.is_available() else 'cpu') if device is None else device
-        # initialize the GFP-GAN
-        if arch == 'clean':
-            self.gfpgan = GFPGANv1Clean(
-                out_size=512,
-                num_style_feat=512,
-                channel_multiplier=channel_multiplier,
-                decoder_load_path=None,
-                fix_decoder=False,
-                num_mlp=8,
-                input_is_latent=True,
-                different_w=True,
-                narrow=1,
-                sft_half=True)
-        elif arch == 'bilinear':
-            self.gfpgan = GFPGANBilinear(
-                out_size=512,
-                num_style_feat=512,
-                channel_multiplier=channel_multiplier,
-                decoder_load_path=None,
-                fix_decoder=False,
-                num_mlp=8,
-                input_is_latent=True,
-                different_w=True,
-                narrow=1,
-                sft_half=True)
-        elif arch == 'original':
-            self.gfpgan = GFPGANv1(
-                out_size=512,
-                num_style_feat=512,
-                channel_multiplier=channel_multiplier,
-                decoder_load_path=None,
-                fix_decoder=True,
-                num_mlp=8,
-                input_is_latent=True,
-                different_w=True,
-                narrow=1,
-                sft_half=True)
-        elif arch == 'RestoreFormer':
-            from gfpgan.archs.restoreformer_arch import RestoreFormer
-            self.gfpgan = RestoreFormer()
-        # initialize face helper
-        self.face_helper = FaceRestoreHelper(
-            upscale,
-            face_size=512,
-            crop_ratio=(1, 1),
-            det_model='retinaface_resnet50',
-            save_ext='png',
-            use_parse=True,
-            device=self.device,
-            model_rootpath=model_dir)
-
-        if model_path.startswith('https://'):
-            model_path = load_file_from_url(
-                url=model_path, model_dir=model_dir, progress=True, file_name=None)
-        loadnet = torch.load(model_path)
-        if 'params_ema' in loadnet:
-            keyname = 'params_ema'
-        else:
-            keyname = 'params'
-        self.gfpgan.load_state_dict(loadnet[keyname], strict=True)
-        self.gfpgan.eval()
-        self.gfpgan = self.gfpgan.to(self.device)
-
-    @torch.no_grad()
-    def enhance(self, img, has_aligned=False, only_center_face=False, paste_back=True, weight=0.5):
-        self.face_helper.clean_all()
-
-        if has_aligned:  # the inputs are already aligned
-            img = cv2.resize(img, (512, 512))
-            self.face_helper.cropped_faces = [img]
-        else:
-            self.face_helper.read_image(img)
-            # get face landmarks for each face
-            self.face_helper.get_face_landmarks_5(only_center_face=only_center_face, eye_dist_threshold=5)
-            # eye_dist_threshold=5: skip faces whose eye distance is smaller than 5 pixels
-            # TODO: even with eye_dist_threshold, it will still introduce wrong detections and restorations.
-            # align and warp each face
-            self.face_helper.align_warp_face()
-
-        # face restoration
-        for cropped_face in self.face_helper.cropped_faces:
-            # prepare data
-            cropped_face_t = img2tensor(cropped_face / 255., bgr2rgb=True, float32=True)
-            normalize(cropped_face_t, (0.5, 0.5, 0.5), (0.5, 0.5, 0.5), inplace=True)
-            cropped_face_t = cropped_face_t.unsqueeze(0).to(self.device)
-
-            try:
-                output = self.gfpgan(cropped_face_t, return_rgb=False, weight=weight)[0]
-                # convert to image
-                restored_face = tensor2img(output.squeeze(0), rgb2bgr=True, min_max=(-1, 1))
-            except RuntimeError as error:
-                print(f'\tFailed inference for GFPGAN: {error}.')
-                restored_face = cropped_face
-
-            restored_face = restored_face.astype('uint8')
-            self.face_helper.add_restored_face(restored_face)
-
-        if not has_aligned and paste_back:
-            # upsample the background
-            if self.bg_upsampler is not None:
-                # Now only support RealESRGAN for upsampling background
-                bg_img = self.bg_upsampler.enhance(img, outscale=self.upscale)[0]
-            else:
-                bg_img = None
-
-            self.face_helper.get_inverse_affine(None)
-            # paste each restored face to the input image
-            restored_img = self.face_helper.paste_faces_to_input_image(upsample_img=bg_img)
-            return self.face_helper.cropped_faces, self.face_helper.restored_faces, restored_img
-        else:
-            return self.face_helper.cropped_faces, self.face_helper.restored_faces, None

modules/ldsr_model.py

 import os
 import sys
 import traceback
-from collections import namedtuple
 
-from modules import shared, images, modelloader, paths
-from modules.paths import models_path
-
-model_dir = "LDSR"
-model_path = os.path.join(models_path, model_dir)
-cmd_path = None
-model_url = "https://heibox.uni-heidelberg.de/f/578df07c8fc04ffbadf3/?dl=1"
-yaml_url = "https://heibox.uni-heidelberg.de/f/31a76b13ea27482981b4/?dl=1"
+from basicsr.utils.download_util import load_file_from_url
 
-LDSRModelInfo = namedtuple("LDSRModelInfo", ["name", "location", "model", "netscale"])
-
-ldsr_models = []
-have_ldsr = False
-LDSR_obj = None
+from modules.upscaler import Upscaler, UpscalerData
+from modules.ldsr_model_arch import LDSR
+from modules import shared
+from modules.paths import models_path
 
 
-class UpscalerLDSR(images.Upscaler):
-    def __init__(self, steps):
-        self.steps = steps
+class UpscalerLDSR(Upscaler):
+    def __init__(self, user_path):
         self.name = "LDSR"
-
-    def do_upscale(self, img):
-        return upscale_with_ldsr(img)
-
-
-def setup_model(dirname):
-    global cmd_path
-    global model_path
-    if not os.path.exists(model_path):
-        os.makedirs(model_path)
-    cmd_path = dirname
-    shared.sd_upscalers.append(UpscalerLDSR(100))
-
-
-def prepare_ldsr():
-    path = paths.paths.get("LDSR", None)
-    if path is None:
-        return
-    global have_ldsr
-    global LDSR_obj
-    try:
-        from LDSR import LDSR
-        model_files = modelloader.load_models(model_path, model_url, cmd_path, dl_name="model.ckpt", ext_filter=[".ckpt"])
-        yaml_files = modelloader.load_models(model_path, yaml_url, cmd_path, dl_name="project.yaml", ext_filter=[".yaml"])
-        if len(model_files) != 0 and len(yaml_files) != 0:
-            model_file = model_files[0]
-            yaml_file = yaml_files[0]
-            have_ldsr = True
-            LDSR_obj = LDSR(model_file, yaml_file)
-        else:
-            return
-
-    except Exception:
-        print("Error importing LDSR:", file=sys.stderr)
-        print(traceback.format_exc(), file=sys.stderr)
-        have_ldsr = False
-
-
-def upscale_with_ldsr(image):
-    prepare_ldsr()
-    if not have_ldsr or LDSR_obj is None:
-        return image
-
-    ddim_steps = shared.opts.ldsr_steps
-    pre_scale = shared.opts.ldsr_pre_down
-    post_scale = shared.opts.ldsr_post_down
-
-    image = LDSR_obj.super_resolution(image, ddim_steps, pre_scale, post_scale)
-    return image
+        self.model_path = os.path.join(models_path, self.name)
+        self.user_path = user_path
+        self.model_url = "https://heibox.uni-heidelberg.de/f/578df07c8fc04ffbadf3/?dl=1"
+        self.yaml_url = "https://heibox.uni-heidelberg.de/f/31a76b13ea27482981b4/?dl=1"
+        super().__init__()
+        scaler_data = UpscalerData("LDSR", None, self)
+        self.scalers = [scaler_data]
+
+    def load_model(self, path: str):
+        model = load_file_from_url(url=self.model_url, model_dir=self.model_path,
+                                   file_name="model.pth", progress=True)
+        yaml = load_file_from_url(url=self.model_url, model_dir=self.model_path,
+                                  file_name="project.yaml", progress=True)
+
+        try:
+            return LDSR(model, yaml)
+
+        except Exception:
+            print("Error importing LDSR:", file=sys.stderr)
+            print(traceback.format_exc(), file=sys.stderr)
+        return None
+
+    def do_upscale(self, img, path):
+        ldsr = self.load_model(path)
+        if ldsr is None:
+            print("NO LDSR!")
+            return img
+        ddim_steps = shared.opts.ldsr_steps
+        pre_scale = shared.opts.ldsr_pre_down
+        return ldsr.super_resolution(img, ddim_steps, self.scale)

modules/ldsr_model_arch.py

+import gc
+import time
+import warnings
+
+import numpy as np
+import torch
+import torchvision
+from PIL import Image
+from einops import rearrange, repeat
+from omegaconf import OmegaConf
+
+from ldm.models.diffusion.ddim import DDIMSampler
+from ldm.util import instantiate_from_config, ismap
+
+warnings.filterwarnings("ignore", category=UserWarning)
+
+
+# Create LDSR Class
+class LDSR:
+    def load_model_from_config(self, half_attention):
+        print(f"Loading model from {self.modelPath}")
+        pl_sd = torch.load(self.modelPath, map_location="cpu")
+        sd = pl_sd["state_dict"]
+        config = OmegaConf.load(self.yamlPath)
+        model = instantiate_from_config(config.model)
+        model.load_state_dict(sd, strict=False)
+        model.cuda()
+        if half_attention:
+            model = model.half()
+
+        model.eval()
+        return {"model": model}
+
+    def __init__(self, model_path, yaml_path):
+        self.modelPath = model_path
+        self.yamlPath = yaml_path
+
+    @staticmethod
+    def run(model, selected_path, custom_steps, eta):
+        example = get_cond(selected_path)
+
+        n_runs = 1
+        guider = None
+        ckwargs = None
+        ddim_use_x0_pred = False
+        temperature = 1.
+        eta = eta
+        custom_shape = None
+
+        height, width = example["image"].shape[1:3]
+        split_input = height >= 128 and width >= 128
+
+        if split_input:
+            ks = 128
+            stride = 64
+            vqf = 4  #
+            model.split_input_params = {"ks": (ks, ks), "stride": (stride, stride),
+                                        "vqf": vqf,
+                                        "patch_distributed_vq": True,
+                                        "tie_braker": False,
+                                        "clip_max_weight": 0.5,
+                                        "clip_min_weight": 0.01,
+                                        "clip_max_tie_weight": 0.5,
+                                        "clip_min_tie_weight": 0.01}
+        else:
+            if hasattr(model, "split_input_params"):
+                delattr(model, "split_input_params")
+
+        x_t = None
+        logs = None
+        for n in range(n_runs):
+            if custom_shape is not None:
+                x_t = torch.randn(1, custom_shape[1], custom_shape[2], custom_shape[3]).to(model.device)
+                x_t = repeat(x_t, '1 c h w -> b c h w', b=custom_shape[0])
+
+            logs = make_convolutional_sample(example, model,
+                                             custom_steps=custom_steps,
+                                             eta=eta, quantize_x0=False,
+                                             custom_shape=custom_shape,
+                                             temperature=temperature, noise_dropout=0.,
+                                             corrector=guider, corrector_kwargs=ckwargs, x_T=x_t,
+                                             ddim_use_x0_pred=ddim_use_x0_pred
+                                             )
+        return logs
+
+    def super_resolution(self, image, steps=100, target_scale=2, half_attention=False):
+        model = self.load_model_from_config(half_attention)
+
+        # Run settings
+        diffusion_steps = int(steps)
+        eta = 1.0
+
+        down_sample_method = 'Lanczos'
+
+        gc.collect()
+        torch.cuda.empty_cache()
+
+        im_og = image
+        width_og, height_og = im_og.size
+        # If we can adjust the max upscale size, then the 4 below should be our variable
+        print("Foo")
+        down_sample_rate = target_scale / 4
+        print(f"Downsample rate is {down_sample_rate}")
+        width_downsampled_pre = width_og * down_sample_rate
+        height_downsampled_pre = height_og * down_sample_method
+
+        if down_sample_rate != 1:
+            print(
+                f'Downsampling from [{width_og}, {height_og}] to [{width_downsampled_pre}, {height_downsampled_pre}]')
+            im_og = im_og.resize((width_downsampled_pre, height_downsampled_pre), Image.LANCZOS)
+        else:
+            print(f"Down sample rate is 1 from {target_scale} / 4")
+        logs = self.run(model["model"], im_og, diffusion_steps, eta)
+
+        sample = logs["sample"]
+        sample = sample.detach().cpu()
+        sample = torch.clamp(sample, -1., 1.)
+        sample = (sample + 1.) / 2. * 255
+        sample = sample.numpy().astype(np.uint8)
+        sample = np.transpose(sample, (0, 2, 3, 1))
+        a = Image.fromarray(sample[0])
+
+        del model
+        gc.collect()
+        torch.cuda.empty_cache()
+        print(f'Processing finished!')
+        return a
+
+
+def get_cond(selected_path):
+    example = dict()
+    up_f = 4
+    c = selected_path.convert('RGB')
+    c = torch.unsqueeze(torchvision.transforms.ToTensor()(c), 0)
+    c_up = torchvision.transforms.functional.resize(c, size=[up_f * c.shape[2], up_f * c.shape[3]],
+                                                    antialias=True)
+    c_up = rearrange(c_up, '1 c h w -> 1 h w c')
+    c = rearrange(c, '1 c h w -> 1 h w c')
+    c = 2. * c - 1.
+
+    c = c.to(torch.device("cuda"))
+    example["LR_image"] = c
+    example["image"] = c_up
+
+    return example
+
+
+@torch.no_grad()
+def convsample_ddim(model, cond, steps, shape, eta=1.0, callback=None, normals_sequence=None,
+                    mask=None, x0=None, quantize_x0=False, temperature=1., score_corrector=None,
+                    corrector_kwargs=None, x_t=None
+                    ):
+    ddim = DDIMSampler(model)
+    bs = shape[0]
+    shape = shape[1:]
+    print(f"Sampling with eta = {eta}; steps: {steps}")
+    samples, intermediates = ddim.sample(steps, batch_size=bs, shape=shape, conditioning=cond, callback=callback,
+                                         normals_sequence=normals_sequence, quantize_x0=quantize_x0, eta=eta,
+                                         mask=mask, x0=x0, temperature=temperature, verbose=False,
+                                         score_corrector=score_corrector,
+                                         corrector_kwargs=corrector_kwargs, x_t=x_t)
+
+    return samples, intermediates
+
+
+@torch.no_grad()
+def make_convolutional_sample(batch, model, custom_steps=None, eta=1.0, quantize_x0=False, custom_shape=None, temperature=1., noise_dropout=0., corrector=None,
+                              corrector_kwargs=None, x_T=None, ddim_use_x0_pred=False):
+    log = dict()
+
+    z, c, x, xrec, xc = model.get_input(batch, model.first_stage_key,
+                                        return_first_stage_outputs=True,
+                                        force_c_encode=not (hasattr(model, 'split_input_params')
+                                                            and model.cond_stage_key == 'coordinates_bbox'),
+                                        return_original_cond=True)
+
+    if custom_shape is not None:
+        z = torch.randn(custom_shape)
+        print(f"Generating {custom_shape[0]} samples of shape {custom_shape[1:]}")
+
+    z0 = None
+
+    log["input"] = x
+    log["reconstruction"] = xrec
+
+    if ismap(xc):
+        log["original_conditioning"] = model.to_rgb(xc)
+        if hasattr(model, 'cond_stage_key'):
+            log[model.cond_stage_key] = model.to_rgb(xc)
+
+    else:
+        log["original_conditioning"] = xc if xc is not None else torch.zeros_like(x)
+        if model.cond_stage_model:
+            log[model.cond_stage_key] = xc if xc is not None else torch.zeros_like(x)
+            if model.cond_stage_key == 'class_label':
+                log[model.cond_stage_key] = xc[model.cond_stage_key]
+
+    with model.ema_scope("Plotting"):
+        t0 = time.time()
+
+        sample, intermediates = convsample_ddim(model, c, steps=custom_steps, shape=z.shape,
+                                                eta=eta,
+                                                quantize_x0=quantize_x0, mask=None, x0=z0,
+                                                temperature=temperature, score_corrector=corrector, corrector_kwargs=corrector_kwargs,
+                                                x_t=x_T)
+        t1 = time.time()
+
+        if ddim_use_x0_pred:
+            sample = intermediates['pred_x0'][-1]
+
+    x_sample = model.decode_first_stage(sample)
+
+    try:
+        x_sample_noquant = model.decode_first_stage(sample, force_not_quantize=True)
+        log["sample_noquant"] = x_sample_noquant
+        log["sample_diff"] = torch.abs(x_sample_noquant - x_sample)
+    except:
+        pass
+
+    log["sample"] = x_sample
+    log["time"] = t1 - t0
+
+    return log

modules/modelloader.py

 import os
 import shutil
+import importlib
 from urllib.parse import urlparse
 
 from basicsr.utils.download_util import load_file_from_url
 
+from modules import shared
+from modules.upscaler import Upscaler
 from modules.paths import script_path, models_path
 
 
-def load_models(model_path: str, model_url: str = None, command_path: str = None, dl_name: str = None, existing=None,
-                ext_filter=None) -> list:
+def load_models(model_path: str, model_url: str = None, command_path: str = None, ext_filter=None, download_name=None) -> list:
     """
     A one-and done loader to try finding the desired models in specified directories.
 
-    @param dl_name: The file name to use for downloading a model. If not specified, it will be used from the URL.
-    @param model_url: If specified, attempt to download model from the given URL.
+    @param download_name: Specify to download from model_url immediately.
+    @param model_url: If no other models are found, this will be downloaded on upscale.
     @param model_path: The location to store/find models in.
     @param command_path: A command-line argument to search for models in first.
-    @param existing: An array of existing model paths.
     @param ext_filter: An optional list of filename extensions to filter by
     @return: A list of paths containing the desired model(s)
     """
+    output = []
+
     if ext_filter is None:
         ext_filter = []
-    if existing is None:
-        existing = []
     try:
         places = []
         if command_path is not None and command_path != model_path:
             pretrained_path = os.path.join(command_path, 'experiments/pretrained_models')
             if os.path.exists(pretrained_path):
+                print(f"Appending path: {pretrained_path}")
                 places.append(pretrained_path)
             elif os.path.exists(command_path):
                 places.append(command_path)
@@ -36,26 +38,24 @@ def load_models(model_path: str, model_url: str = None, command_path: str = None
         for place in places:
             if os.path.exists(place):
                 for file in os.listdir(place):
-                    if os.path.isdir(file):
+                    full_path = os.path.join(place, file)
+                    if os.path.isdir(full_path):
                         continue
                     if len(ext_filter) != 0:
                         model_name, extension = os.path.splitext(file)
                         if extension not in ext_filter:
                             continue
-                    if file not in existing:
-                        path = os.path.join(place, file)
-                        existing.append(path)
-        if model_url is not None and len(existing) == 0:
-            if dl_name is not None:
-                model_file = load_file_from_url(url=model_url, model_dir=model_path, file_name=dl_name, progress=True)
+                    if file not in output:
+                        output.append(full_path)
+        if model_url is not None and len(output) == 0:
+            if download_name is not None:
+                dl = load_file_from_url(model_url, model_path, True, download_name)
+                output.append(dl)
             else:
-                model_file = load_file_from_url(url=model_url, model_dir=model_path, progress=True)
-
-            if os.path.exists(model_file) and os.path.isfile(model_file) and model_file not in existing:
-                existing.append(model_file)
+                output.append(model_url)
     except:
         pass
-    return existing
+    return output
 
 
 def friendly_name(file: str):
@@ -110,4 +110,38 @@ def move_files(src_path: str, dest_path: str, ext_filter: str = None):
                 print(f"Removing empty folder: {src_path}")
                 shutil.rmtree(src_path, True)
     except:
-        pass
\ No newline at end of file
+        pass
+
+
+def load_upscalers():
+    datas = []
+    for cls in Upscaler.__subclasses__():
+        name = cls.__name__
+        module_name = cls.__module__
+        print(f"Class: {name} and {module_name}")
+        module = importlib.import_module(module_name)
+        class_ = getattr(module, name)
+        cmd_name = f"{name.lower().replace('upscaler', '')}-models-path"
+        print(f"CMD Name: {cmd_name}")
+        opt_string = None
+        try:
+            opt_string = shared.opts.__getattr__(cmd_name)
+        except:
+            pass
+        scaler = class_(opt_string)
+        for child in scaler.scalers:
+            print(f"Appending {child.name}")
+            datas.append(child)
+
+    shared.sd_upscalers = datas
+
+    # for scaler in subclasses:
+    #     print(f"Found scaler: {type(scaler).__name__}")
+    #     try:
+    #         scaler = scaler()
+    #         for child in scaler.scalers:
+    #             print(f"Appending {child.name}")
+    #             datas.append[child]
+    #     except:
+    #         pass
+    # shared.sd_upscalers = datas

modules/realesrgan_model.py

 import os
 import sys
 import traceback
-from collections import namedtuple
 
 import numpy as np
 from PIL import Image
 from basicsr.utils.download_util import load_file_from_url
 from realesrgan import RealESRGANer
 
-import modules.images
+from modules.upscaler import Upscaler, UpscalerData
 from modules.paths import models_path
 from modules.shared import cmd_opts, opts
 
-model_dir = "RealESRGAN"
-model_path = os.path.join(models_path, model_dir)
-cmd_dir = None
-RealesrganModelInfo = namedtuple("RealesrganModelInfo", ["name", "location", "model", "netscale"])
-realesrgan_models = []
-have_realesrgan = False
 
+class UpscalerRealESRGAN(Upscaler):
+    def __init__(self, path):
+        self.name = "RealESRGAN"
+        self.model_path = os.path.join(models_path, self.name)
+        self.user_path = path
+        super().__init__()
+        try:
+            from basicsr.archs.rrdbnet_arch import RRDBNet
+            from realesrgan import RealESRGANer
+            from realesrgan.archs.srvgg_arch import SRVGGNetCompact
+            self.enable = True
+            self.scalers = []
+            scalers = self.load_models(path)
+            for scaler in scalers:
+                if scaler.name in opts.realesrgan_enabled_models:
+                    self.scalers.append(scaler)
+
+        except Exception:
+            print("Error importing Real-ESRGAN:", file=sys.stderr)
+            print(traceback.format_exc(), file=sys.stderr)
+            self.enable = False
+            self.scalers = []
+
+    def do_upscale(self, img, path):
+        if not self.enable:
+            return img
+
+        info = self.load_model(path)
+        if not os.path.exists(info.data_path):
+            print("Unable to load RealESRGAN model: %s" % info.name)
+            return img
+
+        upsampler = RealESRGANer(
+            scale=info.scale,
+            model_path=info.data_path,
+            model=info.model(),
+            half=not cmd_opts.no_half,
+            tile=opts.ESRGAN_tile,
+            tile_pad=opts.ESRGAN_tile_overlap,
+        )
+
+        upsampled = upsampler.enhance(np.array(img), outscale=info.scale)[0]
+
+        image = Image.fromarray(upsampled)
+        return image
+
+    def load_model(self, path):
+        try:
+            info = None
+            for scaler in self.scalers:
+                if scaler.data_path == path:
+                    info = scaler
+
+            if info is None:
+                print(f"Unable to find model info: {path}")
+                return None
+
+            model_file = load_file_from_url(url=info.data_path, model_dir=self.model_path, progress=True)
+            info.data_path = model_file
+            return info
+        except Exception as e:
+            print(f"Error making Real-ESRGAN models list: {e}", file=sys.stderr)
+            print(traceback.format_exc(), file=sys.stderr)
+        return None
 
-def get_realesrgan_models():
+    def load_models(self, _):
+        return get_realesrgan_models(self)
+
+
+def get_realesrgan_models(scaler):
     try:
         from basicsr.archs.rrdbnet_arch import RRDBNet
         from realesrgan.archs.srvgg_arch import SRVGGNetCompact
         models = [
-            RealesrganModelInfo(
-                name="Real-ESRGAN General x4x3",
-                location="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.5.0/realesr-general-x4v3.pth",
-                netscale=4,
-                model=lambda: SRVGGNetCompact(num_in_ch=3, num_out_ch=3, num_feat=64, num_conv=32, upscale=4, act_type='prelu')
+            UpscalerData(
+                name="R-ESRGAN General 4xV3",
+                path="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.5.0/realesr-general-x4v3"
+                     ".pth",
+                scale=4,
+                upscaler=scaler,
+                model=lambda: SRVGGNetCompact(num_in_ch=3, num_out_ch=3, num_feat=64, num_conv=32, upscale=4,
+                                              act_type='prelu')
             ),
-            RealesrganModelInfo(
-                name="Real-ESRGAN General WDN x4x3",
-                location="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.5.0/realesr-general-wdn-x4v3.pth",
-                netscale=4,
-                model=lambda: SRVGGNetCompact(num_in_ch=3, num_out_ch=3, num_feat=64, num_conv=32, upscale=4, act_type='prelu')
+            UpscalerData(
+                name="R-ESRGAN General WDN 4xV3",
+                path="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.5.0/realesr-general-wdn-x4v3.pth",
+                scale=4,
+                upscaler=scaler,
+                model=lambda: SRVGGNetCompact(num_in_ch=3, num_out_ch=3, num_feat=64, num_conv=32, upscale=4,
+                                              act_type='prelu')
             ),
-            RealesrganModelInfo(
-                name="Real-ESRGAN AnimeVideo",
-                location="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.5.0/realesr-animevideov3.pth",
-                netscale=4,
-                model=lambda: SRVGGNetCompact(num_in_ch=3, num_out_ch=3, num_feat=64, num_conv=16, upscale=4, act_type='prelu')
+            UpscalerData(
+                name="R-ESRGAN AnimeVideo",
+                path="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.5.0/realesr-animevideov3.pth",
+                scale=4,
+                upscaler=scaler,
+                model=lambda: SRVGGNetCompact(num_in_ch=3, num_out_ch=3, num_feat=64, num_conv=16, upscale=4,
+                                              act_type='prelu')
             ),
-            RealesrganModelInfo(
-                name="Real-ESRGAN 4x plus",
-                location="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.1.0/RealESRGAN_x4plus.pth",
-                netscale=4,
+            UpscalerData(
+                name="R-ESRGAN 4x+",
+                path="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.1.0/RealESRGAN_x4plus.pth",
+                scale=4,
+                upscaler=scaler,
                 model=lambda: RRDBNet(num_in_ch=3, num_out_ch=3, num_feat=64, num_block=23, num_grow_ch=32, scale=4)
             ),
-            RealesrganModelInfo(
-                name="Real-ESRGAN 4x plus anime 6B",
-                location="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.2.4/RealESRGAN_x4plus_anime_6B.pth",
-                netscale=4,
+            UpscalerData(
+                name="R-ESRGAN 4x+ Anime6B",
+                path="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.2.4/RealESRGAN_x4plus_anime_6B.pth",
+                scale=4,
+                upscaler=scaler,
                 model=lambda: RRDBNet(num_in_ch=3, num_out_ch=3, num_feat=64, num_block=6, num_grow_ch=32, scale=4)
             ),
-            RealesrganModelInfo(
-                name="Real-ESRGAN 2x plus",
-                location="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.1/RealESRGAN_x2plus.pth",
-                netscale=2,
+            UpscalerData(
+                name="R-ESRGAN 2x+",
+                path="https://github.com/xinntao/Real-ESRGAN/releases/download/v0.2.1/RealESRGAN_x2plus.pth",
+                scale=2,
+                upscaler=scaler,
                 model=lambda: RRDBNet(num_in_ch=3, num_out_ch=3, num_feat=64, num_block=23, num_grow_ch=32, scale=2)
             ),
         ]
@@ -66,69 +137,3 @@ def get_realesrgan_models():
     except Exception as e:
         print("Error making Real-ESRGAN models list:", file=sys.stderr)
         print(traceback.format_exc(), file=sys.stderr)
-
-
-class UpscalerRealESRGAN(modules.images.Upscaler):
-    def __init__(self, upscaling, model_index):
-        self.upscaling = upscaling
-        self.model_index = model_index
-        self.name = realesrgan_models[model_index].name
-
-    def do_upscale(self, img):
-        return upscale_with_realesrgan(img, self.upscaling, self.model_index)
-
-
-def setup_model(dirname):
-    global model_path
-    if not os.path.exists(model_path):
-        os.makedirs(model_path)
-
-    global realesrgan_models
-    global have_realesrgan
-    if model_path != dirname:
-        model_path = dirname
-    try:
-        from basicsr.archs.rrdbnet_arch import RRDBNet
-        from realesrgan import RealESRGANer
-        from realesrgan.archs.srvgg_arch import SRVGGNetCompact
-
-        realesrgan_models = get_realesrgan_models()
-        have_realesrgan = True
-
-        for i, model in enumerate(realesrgan_models):
-            if model.name in opts.realesrgan_enabled_models:
-                modules.shared.sd_upscalers.append(UpscalerRealESRGAN(model.netscale, i))
-
-    except Exception:
-        print("Error importing Real-ESRGAN:", file=sys.stderr)
-        print(traceback.format_exc(), file=sys.stderr)
-
-        realesrgan_models = [RealesrganModelInfo('None', '', 0, None)]
-        have_realesrgan = False
-
-
-def upscale_with_realesrgan(image, RealESRGAN_upscaling, RealESRGAN_model_index):
-    if not have_realesrgan:
-        return image
-
-    info = realesrgan_models[RealESRGAN_model_index]
-
-    model = info.model()
-    model_file = load_file_from_url(url=info.location, model_dir=model_path, progress=True)
-    if not os.path.exists(model_file):
-        print("Unable to load RealESRGAN model: %s" % info.name)
-        return image
-
-    upsampler = RealESRGANer(
-        scale=info.netscale,
-        model_path=info.location,
-        model=model,
-        half=not cmd_opts.no_half,
-        tile=opts.ESRGAN_tile,
-        tile_pad=opts.ESRGAN_tile_overlap,
-    )
-
-    upsampled = upsampler.enhance(np.array(image), outscale=RealESRGAN_upscaling)[0]
-
-    image = Image.fromarray(upsampled)
-    return image

modules/sd_models.py

@@ -50,7 +50,7 @@ def setup_model(dirname):
     if not os.path.exists(model_path):
         os.makedirs(model_path)
     checkpoints_list.clear()
-    model_list = modelloader.load_models(model_path, model_url, dirname, model_name, ext_filter=".ckpt")
+    model_list = modelloader.load_models(model_path=model_path, model_url=model_url, command_path=dirname, download_name=model_name, ext_filter=".ckpt")
 
     cmd_ckpt = shared.cmd_opts.ckpt
     if os.path.exists(cmd_ckpt):
@@ -68,6 +68,7 @@ def setup_model(dirname):
 
 def model_hash(filename):
     try:
+        print(f"Opening: {filename}")
         with open(filename, "rb") as file:
             import hashlib
             m = hashlib.sha256()

modules/sd_samplers.py

@@ -154,9 +154,9 @@ class VanillaStableDiffusionSampler:
 
         # existing code fails with cetin step counts, like 9
         try:
-            samples_ddim, _ = self.sampler.sample(S=steps, conditioning=conditioning, batch_size=int(x.shape[0]), shape=x[0].shape, verbose=False, unconditional_guidance_scale=p.cfg_scale, unconditional_conditioning=unconditional_conditioning, x_T=x, eta=p.ddim_eta)
+            samples_ddim, _ = self.sampler.sample(S=steps, conditioning=conditioning, batch_size=int(x.shape[0]), shape=x[0].shape, verbose=False, unconditional_guidance_scale=p.cfg_scale, unconditional_conditioning=unconditional_conditioning, x_t=x, eta=p.ddim_eta)
         except Exception:
-            samples_ddim, _ = self.sampler.sample(S=steps+1, conditioning=conditioning, batch_size=int(x.shape[0]), shape=x[0].shape, verbose=False, unconditional_guidance_scale=p.cfg_scale, unconditional_conditioning=unconditional_conditioning, x_T=x, eta=p.ddim_eta)
+            samples_ddim, _ = self.sampler.sample(S=steps+1, conditioning=conditioning, batch_size=int(x.shape[0]), shape=x[0].shape, verbose=False, unconditional_guidance_scale=p.cfg_scale, unconditional_conditioning=unconditional_conditioning, x_t=x, eta=p.ddim_eta)
 
         return samples_ddim
 

modules/shared.py

-import sys
 import argparse
+import datetime
 import json
 import os
+import sys
+
 import gradio as gr
 import tqdm
-import datetime
 
 import modules.artists
-from modules.paths import script_path, sd_path
-from modules.devices import get_optimal_device
-import modules.styles
 import modules.interrogate
 import modules.memmon
 import modules.sd_models
+import modules.styles
+from modules.devices import get_optimal_device
+from modules.paths import script_path, sd_path
 
 sd_model_file = os.path.join(script_path, 'model.ckpt')
 default_sd_model_file = sd_model_file
@@ -38,6 +39,7 @@ parser.add_argument("--share", action='store_true', help="use share=True for gra
 parser.add_argument("--codeformer-models-path", type=str, help="Path to directory with codeformer model file(s).", default=os.path.join(model_path, 'Codeformer'))
 parser.add_argument("--gfpgan-models-path", type=str, help="Path to directory with GFPGAN model file(s).", default=os.path.join(model_path, 'GFPGAN'))
 parser.add_argument("--esrgan-models-path", type=str, help="Path to directory with ESRGAN model file(s).", default=os.path.join(model_path, 'ESRGAN'))
+parser.add_argument("--bsrgan-models-path", type=str, help="Path to directory with BSRGAN model file(s).", default=os.path.join(model_path, 'BSRGAN'))
 parser.add_argument("--realesrgan-models-path", type=str, help="Path to directory with RealESRGAN model file(s).", default=os.path.join(model_path, 'RealESRGAN'))
 parser.add_argument("--stablediffusion-models-path", type=str, help="Path to directory with Stable-diffusion checkpoints.", default=os.path.join(model_path, 'SwinIR'))
 parser.add_argument("--swinir-models-path", type=str, help="Path to directory with SwinIR model file(s).", default=os.path.join(model_path, 'SwinIR'))
@@ -111,7 +113,7 @@ face_restorers = []
 
 def realesrgan_models_names():
     import modules.realesrgan_model
-    return [x.name for x in modules.realesrgan_model.get_realesrgan_models()]
+    return [x.name for x in modules.realesrgan_model.get_realesrgan_models(None)]
 
 
 class OptionInfo:
@@ -176,13 +178,11 @@ options_templates.update(options_section(('saving-to-dirs', "Saving to a directo
 options_templates.update(options_section(('upscaling', "Upscaling"), {
     "ESRGAN_tile": OptionInfo(192, "Tile size for ESRGAN upscalers. 0 = no tiling.", gr.Slider, {"minimum": 0, "maximum": 512, "step": 16}),
     "ESRGAN_tile_overlap": OptionInfo(8, "Tile overlap, in pixels for ESRGAN upscalers. Low values = visible seam.", gr.Slider, {"minimum": 0, "maximum": 48, "step": 1}),
-    "realesrgan_enabled_models": OptionInfo(["Real-ESRGAN 4x plus", "Real-ESRGAN 4x plus anime 6B"], "Select which RealESRGAN models to show in the web UI. (Requires restart)", gr.CheckboxGroup, lambda: {"choices": realesrgan_models_names()}),
+    "realesrgan_enabled_models": OptionInfo(["R-ESRGAN x4+", "R-ESRGAN x4+ Anime6B"], "Select which Real-ESRGAN models to show in the web UI. (Requires restart)", gr.CheckboxGroup, lambda: {"choices": realesrgan_models_names()}),
     "SWIN_tile": OptionInfo(192, "Tile size for all SwinIR.", gr.Slider, {"minimum": 16, "maximum": 512, "step": 16}),
     "SWIN_tile_overlap": OptionInfo(8, "Tile overlap, in pixels for SwinIR. Low values = visible seam.", gr.Slider, {"minimum": 0, "maximum": 48, "step": 1}),
     "ldsr_steps": OptionInfo(100, "LDSR processing steps. Lower = faster", gr.Slider, {"minimum": 1, "maximum": 200, "step": 1}),
     "ldsr_pre_down": OptionInfo(1, "LDSR Pre-process downssample scale. 1 = no down-sampling, 4 = 1/4 scale.", gr.Slider, {"minimum": 1, "maximum": 4, "step": 1}),
-    "ldsr_post_down": OptionInfo(1, "LDSR Post-process down-sample scale. 1 = no down-sampling, 4 = 1/4 scale.", gr.Slider, {"minimum": 1, "maximum": 4, "step": 1}),
-
     "upscaler_for_img2img": OptionInfo(None, "Upscaler for img2img", gr.Radio, lambda: {"choices": [x.name for x in sd_upscalers]}),
 }))
 

modules/swinir_model.py

 import contextlib
 import os
-import sys
-import traceback
 
 import numpy as np
 import torch
 from PIL import Image
 from basicsr.utils.download_util import load_file_from_url
 
-import modules.images
 from modules import modelloader
 from modules.paths import models_path
 from modules.shared import cmd_opts, opts, device
 from modules.swinir_model_arch import SwinIR as net
+from modules.upscaler import Upscaler, UpscalerData
 
-model_dir = "SwinIR"
-model_url = "https://github.com/JingyunLiang/SwinIR/releases/download/v0.0/003_realSR_BSRGAN_DFOWMFC_s64w8_SwinIR-L_x4_GAN.pth"
-model_name = "SwinIR x4"
-model_path = os.path.join(models_path, model_dir)
-cmd_path = ""
 precision_scope = (
     torch.autocast if cmd_opts.precision == "autocast" else contextlib.nullcontext
 )
 
 
-def load_model(path, scale=4):
-    global model_path
-    global model_name
-    if "http" in path:
-        dl_name = "%s%s" % (model_name.replace(" ", "_"), ".pth")
-        filename = load_file_from_url(url=path, model_dir=model_path, file_name=dl_name, progress=True)
-    else:
-        filename = path
-    if filename is None or not os.path.exists(filename):
-        return None
-    model = net(
-        upscale=scale,
-        in_chans=3,
-        img_size=64,
-        window_size=8,
-        img_range=1.0,
-        depths=[6, 6, 6, 6, 6, 6, 6, 6, 6],
-        embed_dim=240,
-        num_heads=[8, 8, 8, 8, 8, 8, 8, 8, 8],
-        mlp_ratio=2,
-        upsampler="nearest+conv",
-        resi_connection="3conv",
-    )
-
-    pretrained_model = torch.load(filename)
-    model.load_state_dict(pretrained_model["params_ema"], strict=True)
-    if not cmd_opts.no_half:
-        model = model.half()
-    return model
-
-
-def setup_model(dirname):
-    global model_path
-    global model_name
-    global cmd_path
-    if not os.path.exists(model_path):
-        os.makedirs(model_path)
-    cmd_path = dirname
-    model_file = ""
-    try:
-        models = modelloader.load_models(model_path, ext_filter=[".pt", ".pth"], command_path=cmd_path)
-
-        if len(models) != 0:
-            model_file = models[0]
-            name = modelloader.friendly_name(model_file)
-        else:
-            # Add the "default" model if none are found.
-            model_file = model_url
-            name = model_name
+class UpscalerSwinIR(Upscaler):
+    def __init__(self, dirname):
+        self.name = "SwinIR"
+        self.model_url = "https://github.com/JingyunLiang/SwinIR/releases/download/v0.0" \
+                         "/003_realSR_BSRGAN_DFOWMFC_s64w8_SwinIR" \
+                         "-L_x4_GAN.pth "
+        self.model_name = "SwinIR 4x"
+        self.model_path = os.path.join(models_path, self.name)
+        self.user_path = dirname
+        super().__init__()
+        scalers = []
+        model_files = self.find_models(ext_filter=[".pt", ".pth"])
+        for model in model_files:
+            if "http" in model:
+                name = self.model_name
+            else:
+                name = modelloader.friendly_name(model)
+            model_data = UpscalerData(name, model, self)
+            scalers.append(model_data)
+        self.scalers = scalers
+
+    def do_upscale(self, img, model_file):
+        model = self.load_model(model_file)
+        if model is None:
+            return img
+        model = model.to(device)
+        img = upscale(img, model)
+        try:
+            torch.cuda.empty_cache()
+        except:
+            pass
+        return img
 
-        modules.shared.sd_upscalers.append(UpscalerSwin(model_file, name))
-    except Exception:
-        print(f"Error loading SwinIR model: {model_file}", file=sys.stderr)
-        print(traceback.format_exc(), file=sys.stderr)
+    def load_model(self, path, scale=4):
+        if "http" in path:
+            dl_name = "%s%s" % (self.name.replace(" ", "_"), ".pth")
+            filename = load_file_from_url(url=path, model_dir=self.model_path, file_name=dl_name, progress=True)
+        else:
+            filename = path
+        if filename is None or not os.path.exists(filename):
+            return None
+        model = net(
+            upscale=scale,
+            in_chans=3,
+            img_size=64,
+            window_size=8,
+            img_range=1.0,
+            depths=[6, 6, 6, 6, 6, 6, 6, 6, 6],
+            embed_dim=240,
+            num_heads=[8, 8, 8, 8, 8, 8, 8, 8, 8],
+            mlp_ratio=2,
+            upsampler="nearest+conv",
+            resi_connection="3conv",
+        )
+
+        pretrained_model = torch.load(filename)
+        model.load_state_dict(pretrained_model["params_ema"], strict=True)
+        if not cmd_opts.no_half:
+            model = model.half()
+        return model
 
 
 def upscale(
-    img,
-    model,
-    tile=opts.SWIN_tile,
-    tile_overlap=opts.SWIN_tile_overlap,
-    window_size=8,
-    scale=4,
+        img,
+        model,
+        tile=opts.SWIN_tile,
+        tile_overlap=opts.SWIN_tile_overlap,
+        window_size=8,
+        scale=4,
 ):
     img = np.array(img)
     img = img[:, :, ::-1]
@@ -125,34 +124,16 @@ def inference(img, model, tile, tile_overlap, window_size, scale):
 
     for h_idx in h_idx_list:
         for w_idx in w_idx_list:
-            in_patch = img[..., h_idx : h_idx + tile, w_idx : w_idx + tile]
+            in_patch = img[..., h_idx: h_idx + tile, w_idx: w_idx + tile]
             out_patch = model(in_patch)
             out_patch_mask = torch.ones_like(out_patch)
 
             E[
-                ..., h_idx * sf : (h_idx + tile) * sf, w_idx * sf : (w_idx + tile) * sf
+            ..., h_idx * sf: (h_idx + tile) * sf, w_idx * sf: (w_idx + tile) * sf
             ].add_(out_patch)
             W[
-                ..., h_idx * sf : (h_idx + tile) * sf, w_idx * sf : (w_idx + tile) * sf
+            ..., h_idx * sf: (h_idx + tile) * sf, w_idx * sf: (w_idx + tile) * sf
             ].add_(out_patch_mask)
     output = E.div_(W)
 
     return output
-
-
-class UpscalerSwin(modules.images.Upscaler):
-    def __init__(self, filename, title):
-        self.name = title
-        self.filename = filename
-
-    def do_upscale(self, img):
-        model = load_model(self.filename)
-        if model is None:
-            return img
-        model = model.to(device)
-        img = upscale(img, model)
-        try:
-            torch.cuda.empty_cache()
-        except:
-            pass
-        return img
\ No newline at end of file

modules/upscaler.py

+import os
+from abc import abstractmethod
+
+import PIL
+import numpy as np
+import torch
+from PIL import Image
+
+import modules.shared
+from modules import modelloader, shared
+
+LANCZOS = (Image.Resampling.LANCZOS if hasattr(Image, 'Resampling') else Image.LANCZOS)
+from modules.paths import models_path
+
+
+class Upscaler:
+    name = None
+    model_path = None
+    model_name = None
+    model_url = None
+    enable = True
+    filter = None
+    model = None
+    user_path = None
+    scalers: []
+    tile = True
+
+    def __init__(self, create_dirs=False):
+        self.mod_pad_h = None
+        self.tile_size = modules.shared.opts.ESRGAN_tile
+        self.tile_pad = modules.shared.opts.ESRGAN_tile_overlap
+        self.device = modules.shared.device
+        self.img = None
+        self.output = None
+        self.scale = 1
+        self.half = not modules.shared.cmd_opts.no_half
+        self.pre_pad = 0
+        self.mod_scale = None
+        if self.name is not None and create_dirs:
+            self.model_path = os.path.join(models_path, self.name)
+            if not os.path.exists(self.model_path):
+                os.makedirs(self.model_path)
+
+        try:
+            import cv2
+            self.can_tile = True
+        except:
+            pass
+
+    @abstractmethod
+    def do_upscale(self, img: PIL.Image, selected_model: str):
+        return img
+
+    def upscale(self, img: PIL.Image, scale: int, selected_model: str = None):
+        self.scale = scale
+        dest_w = img.width * scale
+        dest_h = img.height * scale
+        for i in range(3):
+            if img.width >= dest_w and img.height >= dest_h:
+                break
+            img = self.do_upscale(img, selected_model)
+        if img.width != dest_w or img.height != dest_h:
+            img = img.resize(dest_w, dest_h, resample=LANCZOS)
+
+        return img
+
+    @abstractmethod
+    def load_model(self, path: str):
+        pass
+
+    def find_models(self, ext_filter=None) -> list:
+        return modelloader.load_models(model_path=self.model_path, model_url=self.model_url, command_path=self.user_path)
+
+    def update_status(self, prompt):
+        print(f"\nextras: {prompt}", file=shared.progress_print_out)
+
+
+class UpscalerData:
+    name = None
+    data_path = None
+    scale: int = 4
+    scaler: Upscaler = None
+    model: None
+
+    def __init__(self, name: str, path: str, upscaler: Upscaler = None, scale: int = 4, model=None):
+        self.name = name
+        self.data_path = path
+        self.scaler = upscaler
+        self.scale = scale
+        self.model = model
+
+
+class UpscalerNone(Upscaler):
+    name = "None"
+    scalers = []
+
+    def load_model(self, path):
+        pass
+
+    def do_upscale(self, img, selected_model=None):
+        return img
+
+    def __init__(self, dirname=None):
+        super().__init__(False)
+        self.scalers = [UpscalerData("None", None, self)]
+
+
+class UpscalerLanczos(Upscaler):
+    scalers = []
+
+    def do_upscale(self, img, selected_model=None):
+        return img.resize((int(img.width * self.scale), int(img.height * self.scale)), resample=LANCZOS)
+
+    def load_model(self, _):
+        pass
+
+    def __init__(self, dirname=None):
+        super().__init__(False)
+        self.name = "Lanczos"
+        self.scalers = [UpscalerData("Lanczos", None, self)]
+

webui.py

 import os
 import signal
 import threading
-
+import modules.paths
 import modules.codeformer_model as codeformer
 import modules.esrgan_model as esrgan
+import modules.bsrgan_model as bsrgan
 import modules.extras
 import modules.face_restoration
 import modules.gfpgan_model as gfpgan
@@ -27,11 +28,7 @@ modules.sd_models.setup_model(cmd_opts.stablediffusion_models_path)
 codeformer.setup_model(cmd_opts.codeformer_models_path)
 gfpgan.setup_model(cmd_opts.gfpgan_models_path)
 shared.face_restorers.append(modules.face_restoration.FaceRestoration())
-
-esrgan.setup_model(cmd_opts.esrgan_models_path)
-swinir.setup_model(cmd_opts.swinir_models_path)
-realesrgan.setup_model(cmd_opts.realesrgan_models_path)
-ldsr.setup_model(cmd_opts.ldsr_models_path)
+modelloader.load_upscalers()
 queue_lock = threading.Lock()