import os import numpy as np import torch from PIL import Image from basicsr.utils.download_util import load_file_from_url import modules.esrgan_model_arch as arch from modules import shared, modelloader, images, devices from modules.upscaler import Upscaler, UpscalerData from modules.shared import opts def mod2normal(state_dict): # this code is copied from https://github.com/victorca25/iNNfer if 'conv_first.weight' in state_dict: crt_net = {} items = [] for k, v in state_dict.items(): items.append(k) crt_net['model.0.weight'] = state_dict['conv_first.weight'] crt_net['model.0.bias'] = state_dict['conv_first.bias'] for k in items.copy(): if 'RDB' in k: ori_k = k.replace('RRDB_trunk.', 'model.1.sub.') if '.weight' in k: ori_k = ori_k.replace('.weight', '.0.weight') elif '.bias' in k: ori_k = ori_k.replace('.bias', '.0.bias') crt_net[ori_k] = state_dict[k] items.remove(k) crt_net['model.1.sub.23.weight'] = state_dict['trunk_conv.weight'] crt_net['model.1.sub.23.bias'] = state_dict['trunk_conv.bias'] crt_net['model.3.weight'] = state_dict['upconv1.weight'] crt_net['model.3.bias'] = state_dict['upconv1.bias'] crt_net['model.6.weight'] = state_dict['upconv2.weight'] crt_net['model.6.bias'] = state_dict['upconv2.bias'] crt_net['model.8.weight'] = state_dict['HRconv.weight'] crt_net['model.8.bias'] = state_dict['HRconv.bias'] crt_net['model.10.weight'] = state_dict['conv_last.weight'] crt_net['model.10.bias'] = state_dict['conv_last.bias'] state_dict = crt_net return state_dict def resrgan2normal(state_dict, nb=23): # this code is copied from https://github.com/victorca25/iNNfer if "conv_first.weight" in state_dict and "body.0.rdb1.conv1.weight" in state_dict: re8x = 0 crt_net = {} items = [] for k, v in state_dict.items(): items.append(k) crt_net['model.0.weight'] = state_dict['conv_first.weight'] crt_net['model.0.bias'] = state_dict['conv_first.bias'] for k in items.copy(): if "rdb" in k: ori_k = k.replace('body.', 'model.1.sub.') ori_k = ori_k.replace('.rdb', '.RDB') if '.weight' in k: ori_k = ori_k.replace('.weight', '.0.weight') elif '.bias' in k: ori_k = ori_k.replace('.bias', '.0.bias') crt_net[ori_k] = state_dict[k] items.remove(k) crt_net[f'model.1.sub.{nb}.weight'] = state_dict['conv_body.weight'] crt_net[f'model.1.sub.{nb}.bias'] = state_dict['conv_body.bias'] crt_net['model.3.weight'] = state_dict['conv_up1.weight'] crt_net['model.3.bias'] = state_dict['conv_up1.bias'] crt_net['model.6.weight'] = state_dict['conv_up2.weight'] crt_net['model.6.bias'] = state_dict['conv_up2.bias'] if 'conv_up3.weight' in state_dict: # modification supporting: https://github.com/ai-forever/Real-ESRGAN/blob/main/RealESRGAN/rrdbnet_arch.py re8x = 3 crt_net['model.9.weight'] = state_dict['conv_up3.weight'] crt_net['model.9.bias'] = state_dict['conv_up3.bias'] crt_net[f'model.{8+re8x}.weight'] = state_dict['conv_hr.weight'] crt_net[f'model.{8+re8x}.bias'] = state_dict['conv_hr.bias'] crt_net[f'model.{10+re8x}.weight'] = state_dict['conv_last.weight'] crt_net[f'model.{10+re8x}.bias'] = state_dict['conv_last.bias'] state_dict = crt_net return state_dict def infer_params(state_dict): # this code is copied from https://github.com/victorca25/iNNfer scale2x = 0 scalemin = 6 n_uplayer = 0 plus = False for block in list(state_dict): parts = block.split(".") n_parts = len(parts) if n_parts == 5 and parts[2] == "sub": nb = int(parts[3]) elif n_parts == 3: part_num = int(parts[1]) if (part_num > scalemin and parts[0] == "model" and parts[2] == "weight"): scale2x += 1 if part_num > n_uplayer: n_uplayer = part_num out_nc = state_dict[block].shape[0] if not plus and "conv1x1" in block: plus = True nf = state_dict["model.0.weight"].shape[0] in_nc = state_dict["model.0.weight"].shape[1] out_nc = out_nc scale = 2 ** scale2x return in_nc, out_nc, nf, nb, plus, scale class UpscalerESRGAN(Upscaler): def __init__(self, dirname): self.name = "ESRGAN" self.model_url = "https://github.com/cszn/KAIR/releases/download/v1.0/ESRGAN.pth" self.model_name = "ESRGAN_4x" self.scalers = [] self.user_path = dirname super().__init__() model_paths = self.find_models(ext_filter=[".pt", ".pth"]) scalers = [] if len(model_paths) == 0: scaler_data = 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) scaler_data = UpscalerData(name, file, self, 4) self.scalers.append(scaler_data) def do_upscale(self, img, selected_model): model = self.load_model(selected_model) if model is None: return img model.to(devices.device_esrgan) img = esrgan_upscale(model, img) return img 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=f"{self.model_name}.pth", progress=True, ) else: filename = path if not os.path.exists(filename) or filename is None: print(f"Unable to load {self.model_path} from {filename}") return None state_dict = torch.load(filename, map_location='cpu' if devices.device_esrgan.type == 'mps' else None) if "params_ema" in state_dict: state_dict = state_dict["params_ema"] elif "params" in state_dict: state_dict = state_dict["params"] num_conv = 16 if "realesr-animevideov3" in filename else 32 model = arch.SRVGGNetCompact(num_in_ch=3, num_out_ch=3, num_feat=64, num_conv=num_conv, upscale=4, act_type='prelu') model.load_state_dict(state_dict) model.eval() return model if "body.0.rdb1.conv1.weight" in state_dict and "conv_first.weight" in state_dict: nb = 6 if "RealESRGAN_x4plus_anime_6B" in filename else 23 state_dict = resrgan2normal(state_dict, nb) elif "conv_first.weight" in state_dict: state_dict = mod2normal(state_dict) elif "model.0.weight" not in state_dict: raise Exception("The file is not a recognized ESRGAN model.") in_nc, out_nc, nf, nb, plus, mscale = infer_params(state_dict) model = arch.RRDBNet(in_nc=in_nc, out_nc=out_nc, nf=nf, nb=nb, upscale=mscale, plus=plus) model.load_state_dict(state_dict) model.eval() return model def upscale_without_tiling(model, img): img = np.array(img) img = img[:, :, ::-1] img = np.ascontiguousarray(np.transpose(img, (2, 0, 1))) / 255 img = torch.from_numpy(img).float() img = img.unsqueeze(0).to(devices.device_esrgan) 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] return Image.fromarray(output, 'RGB') def esrgan_upscale(model, img): if opts.ESRGAN_tile == 0: return upscale_without_tiling(model, img) grid = images.split_grid(img, opts.ESRGAN_tile, opts.ESRGAN_tile, opts.ESRGAN_tile_overlap) newtiles = [] scale_factor = 1 for y, h, row in grid.tiles: newrow = [] for tiledata in row: x, w, tile = tiledata output = upscale_without_tiling(model, tile) scale_factor = output.width // tile.width newrow.append([x * scale_factor, w * scale_factor, output]) newtiles.append([y * scale_factor, h * scale_factor, newrow]) newgrid = images.Grid(newtiles, grid.tile_w * scale_factor, grid.tile_h * scale_factor, grid.image_w * scale_factor, grid.image_h * scale_factor, grid.overlap * scale_factor) output = images.combine_grid(newgrid) return output