From 1a1f7e85c772e48ed923470f62ec2d32f9ff361f Mon Sep 17 00:00:00 2001
From: d8ahazard <d8ahazard@gmail.com>
Date: Wed, 21 Sep 2022 08:06:37 -0500
Subject: Add LDSR and "GoLatent?" Upscaling (#763)

* Add LDSR Upscaling
---
 modules/ldsr_model.py | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 modules/ldsr_model.py

(limited to 'modules/ldsr_model.py')

diff --git a/modules/ldsr_model.py b/modules/ldsr_model.py
new file mode 100644
index 00000000..95e84659
--- /dev/null
+++ b/modules/ldsr_model.py
@@ -0,0 +1,67 @@
+import os
+import sys
+import traceback
+from collections import namedtuple
+
+from basicsr.utils.download_util import load_file_from_url
+
+import modules.images
+from modules import shared
+from modules.paths import script_path
+
+LDSRModelInfo = namedtuple("LDSRModelInfo", ["name", "location", "model", "netscale"])
+
+ldsr_models = []
+have_ldsr = False
+LDSR_obj = None
+
+
+class UpscalerLDSR(modules.images.Upscaler):
+    def __init__(self, steps):
+        self.steps = steps
+        self.name = "LDSR"
+
+    def do_upscale(self, img):
+        return upscale_with_ldsr(img)
+
+
+def add_lsdr():
+    modules.shared.sd_upscalers.append(UpscalerLDSR(100))
+
+
+def setup_ldsr():
+    path = modules.paths.paths.get("LDSR", None)
+    if path is None:
+        return
+    global have_ldsr
+    global LDSR_obj
+    try:
+        from LDSR import LDSR
+        model_url = "https://heibox.uni-heidelberg.de/f/578df07c8fc04ffbadf3/?dl=1"
+        yaml_url = "https://heibox.uni-heidelberg.de/f/31a76b13ea27482981b4/?dl=1"
+        repo_path = 'latent-diffusion/experiments/pretrained_models/'
+        model_path = load_file_from_url(url=model_url, model_dir=os.path.join("repositories", repo_path),
+                                        progress=True, file_name="model.chkpt")
+        yaml_path = load_file_from_url(url=yaml_url, model_dir=os.path.join("repositories", repo_path),
+                                       progress=True, file_name="project.yaml")
+        have_ldsr = True
+        LDSR_obj = LDSR(model_path, yaml_path)
+
+
+    except Exception:
+        print("Error importing LDSR:", file=sys.stderr)
+        print(traceback.format_exc(), file=sys.stderr)
+        have_ldsr = False
+
+
+def upscale_with_ldsr(image):
+    setup_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
-- 
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