#!/usr/bin/env python3 # Code by Kat Crowson in k-diffusion repo, modified by Scott H Hawley (SHH) # Modified by Scott H. Hawley for masking, ZeroGPU ets. """Samples from k-diffusion models.""" import gradio import spaces import natten import argparse from pathlib import Path import accelerate import safetensors.torch as safetorch import torch from tqdm import trange, tqdm from PIL import Image from torchvision import transforms import k_diffusion as K from pom.v_diffusion import DDPM, LogSchedule, CrashSchedule #CHORD_BORDER = 8 # chord border size in pixels from pom.chords import CHORD_BORDER, img_batch_to_seq_emb, ChordSeqEncoder # ---- my mangled sampler that includes repaint import torchsde @spaces.GPU class BatchedBrownianTree: """A wrapper around torchsde.BrownianTree that enables batches of entropy.""" def __init__(self, x, t0, t1, seed=None, **kwargs): t0, t1, self.sign = self.sort(t0, t1) w0 = kwargs.get('w0', torch.zeros_like(x)) if seed is None: seed = torch.randint(0, 2 ** 63 - 1, []).item() self.batched = True try: assert len(seed) == x.shape[0] w0 = w0[0] except TypeError: seed = [seed] self.batched = False self.trees = [torchsde.BrownianTree(t0, w0, t1, entropy=s, **kwargs) for s in seed] @staticmethod def sort(a, b): return (a, b, 1) if a < b else (b, a, -1) def __call__(self, t0, t1): t0, t1, sign = self.sort(t0, t1) w = torch.stack([tree(t0, t1) for tree in self.trees]) * (self.sign * sign) return w if self.batched else w[0] @spaces.GPU class BrownianTreeNoiseSampler: """A noise sampler backed by a torchsde.BrownianTree. Args: x (Tensor): The tensor whose shape, device and dtype to use to generate random samples. sigma_min (float): The low end of the valid interval. sigma_max (float): The high end of the valid interval. seed (int or List[int]): The random seed. If a list of seeds is supplied instead of a single integer, then the noise sampler will use one BrownianTree per batch item, each with its own seed. transform (callable): A function that maps sigma to the sampler's internal timestep. """ def __init__(self, x, sigma_min, sigma_max, seed=None, transform=lambda x: x): self.transform = transform t0, t1 = self.transform(torch.as_tensor(sigma_min)), self.transform(torch.as_tensor(sigma_max)) self.tree = BatchedBrownianTree(x, t0, t1, seed) def __call__(self, sigma, sigma_next): t0, t1 = self.transform(torch.as_tensor(sigma)), self.transform(torch.as_tensor(sigma_next)) return self.tree(t0, t1) / (t1 - t0).abs().sqrt() def append_dims(x, target_dims): """Appends dimensions to the end of a tensor until it has target_dims dimensions.""" dims_to_append = target_dims - x.ndim if dims_to_append < 0: raise ValueError(f'input has {x.ndim} dims but target_dims is {target_dims}, which is less') return x[(...,) + (None,) * dims_to_append] def to_d(x, sigma, denoised): """Converts a denoiser output to a Karras ODE derivative.""" return (x - denoised) / append_dims(sigma, x.ndim) @spaces.GPU @torch.no_grad() def my_sample_euler(model, x, sigmas, extra_args=None, callback=None, disable=None, s_churn=0., s_tmin=0., s_tmax=float('inf'), s_noise=1., repaint=1): """Implements Algorithm 2 (Euler steps) from Karras et al. (2022).""" extra_args = {} if extra_args is None else extra_args s_in = x.new_ones([x.shape[0]]) for i in trange(len(sigmas) - 1, disable=disable): for u in range(repaint): gamma = min(s_churn / (len(sigmas) - 1), 2 ** 0.5 - 1) if s_tmin <= sigmas[i] <= s_tmax else 0. eps = torch.randn_like(x) * s_noise sigma_hat = sigmas[i] * (gamma + 1) if gamma > 0: x = x + eps * (sigma_hat ** 2 - sigmas[i] ** 2) ** 0.5 denoised = model(x, sigma_hat * s_in, **extra_args) d = to_d(x, sigma_hat, denoised) if callback is not None: callback({'x': x, 'i': i, 'sigma': sigmas[i], 'sigma_hat': sigma_hat, 'denoised': denoised}) dt = sigmas[i + 1] - sigma_hat # Euler method x = x + d * dt if x.isnan().any(): assert False, f"x has NaNs, i = {i}, u = {u}, repaint = {repaint}" if u < repaint - 1: beta = (sigmas[i + 1] / sigmas[-1]) ** 2 x = torch.sqrt(1 - beta) * x + torch.sqrt(beta) * torch.randn_like(x) return x def get_scalings(sigma, sigma_data=0.5): c_skip = sigma_data ** 2 / (sigma ** 2 + sigma_data ** 2) c_out = sigma * sigma_data / (sigma ** 2 + sigma_data ** 2) ** 0.5 c_in = 1 / (sigma ** 2 + sigma_data ** 2) ** 0.5 return c_skip, c_out, c_in @spaces.GPU @torch.no_grad() def my_dpmpp_2m_sde(model, x, sigmas, extra_args=None, callback=None, disable=None, eta=1., s_noise=1., noise_sampler=None, solver_type='midpoint', repaint=4): """DPM-Solver++(2M) SDE. but with repaint added""" if solver_type not in {'heun', 'midpoint'}: raise ValueError('solver_type must be \'heun\' or \'midpoint\'') sigma_min, sigma_max = sigmas[sigmas > 0].min(), sigmas.max() noise_sampler = BrownianTreeNoiseSampler(x, sigma_min, sigma_max) if noise_sampler is None else noise_sampler extra_args = {} if extra_args is None else extra_args s_in = x.new_ones([x.shape[0]]) old_denoised = None h_last = None old_x = None for i in trange(len(sigmas) - 1, disable=disable): # time loop for u in range(repaint): denoised = model(x, sigmas[i] * s_in, **extra_args) if callback is not None: callback({'x': x, 'i': i, 'sigma': sigmas[i], 'sigma_hat': sigmas[i], 'denoised': denoised}) #print("i, u, sigmas[i], sigmas[i + 1] = ", i, u, sigmas[i], sigmas[i + 1]) if sigmas[i + 1] == 0: # Denoising step x = denoised else: # DPM-Solver++(2M) SDE t, s = -sigmas[i].log(), -sigmas[i + 1].log() h = s - t eta_h = eta * h x = sigmas[i + 1] / sigmas[i] * (-eta_h).exp() * x + (-h - eta_h).expm1().neg() * denoised if old_denoised is not None: r = h_last / h if solver_type == 'heun': x = x + ((-h - eta_h).expm1().neg() / (-h - eta_h) + 1) * (1 / r) * (denoised - old_denoised) elif solver_type == 'midpoint': x = x + 0.5 * (-h - eta_h).expm1().neg() * (1 / r) * (denoised - old_denoised) if eta: x = x + noise_sampler(sigmas[i], sigmas[i + 1]) * sigmas[i + 1] * (-2 * eta_h).expm1().neg().sqrt() * s_noise if callback is not None: callback({'x': x, 'i': i, 'sigma': sigmas[i], 'sigma_hat': sigmas[i], 'denoised': denoised}) if x.isnan().any(): assert False, f"x has NaNs, i = {i}, u = {u}, repaint = {repaint}" if u < repaint - 1: # RePaint: go "back" in integration via the "forward" process, by adding a little noise to x # ...but scaled properly! # But how to convert from original RePaint to k-diffusion? I'll try a few variants repaint_choice = 'orig' # ['orig','var1','var2', etc...] sigma_diff = (sigmas[i] - sigmas[i+1]).abs() sigma_ratio = ( sigmas[i+1] / sigma_max ) # use i+1 or i? if repaint_choice == 'orig': # attempt at original RePaint algorithm, which used betas # if sigmas are the std devs, then betas are variances? but beta_max = 1, so how to get that? ratio? beta = sigma_ratio**2 x = torch.sqrt(1-beta)*x + torch.sqrt(beta)*torch.randn_like(x) # this is from RePaint Paper elif repaint_choice == 'var1': # or maybe this...? # worse than orig x = x + sigma_diff*torch.randn_like(x) elif repaint_choice == 'var2': # or this...? # yields NaNs x = (1-sigma_diff)*x + sigma_diff*torch.randn_like(x) elif repaint_choice == 'var3': # results similar to var1 x = (1.0-sigma_ratio)*x + sigmas[i+1]*torch.randn_like(x) elif repaint_choice == 'var4': # NaNs # stealing code from elsewhere, no idea WTF I'm doing. #Invert this: target = (input - c_skip * noised_input) / c_out, where target = model_output x_tm1, x_t = x, old_x # x_tm1 = ( x_0 - c_skip * noised_x0 ) / c_out # So x_tm1*c_out = x_0 - c_skip * noised_x0 input, noise = x_tm1, torch.randn_like(x) noised_input = input + noise * append_dims(sigma_diff, input.ndim) c_skip, c_out, c_in = [append_dims(x, input.ndim) for x in get_scalings(sigmas[i])] model_output = x_tm1 renoised_x = c_out * model_output + c_skip * noised_input x = renoised_x elif repaint_choice == 'var5': x = torch.sqrt((1-(sigma_diff/sigma_max)**2))*x + sigma_diff*torch.randn_like(x) # include this? guessing no. #old_denoised = denoised #h_last = h old_denoised = denoised h_last = h old_x = x return x # -----from stable-audio-tools # Define the noise schedule and sampling loop def get_alphas_sigmas(t): """Returns the scaling factors for the clean image (alpha) and for the noise (sigma), given a timestep.""" return torch.cos(t * math.pi / 2), torch.sin(t * math.pi / 2) def alpha_sigma_to_t(alpha, sigma): """Returns a timestep, given the scaling factors for the clean image and for the noise.""" return torch.atan2(sigma, alpha) / math.pi * 2 def t_to_alpha_sigma(t): """Returns the scaling factors for the clean image and for the noise, given a timestep.""" return torch.cos(t * math.pi / 2), torch.sin(t * math.pi / 2) @torch.no_grad() def sample(model, x, steps, eta, **extra_args): """Draws samples from a model given starting noise. v-diffusion""" ts = x.new_ones([x.shape[0]]) # Create the noise schedule t = torch.linspace(1, 0, steps + 1)[:-1] alphas, sigmas = get_alphas_sigmas(t) # The sampling loop for i in trange(steps): # Get the model output (v, the predicted velocity) with torch.cuda.amp.autocast(): v = model(x, ts * t[i], **extra_args).float() # Predict the noise and the denoised image pred = x * alphas[i] - v * sigmas[i] eps = x * sigmas[i] + v * alphas[i] # If we are not on the last timestep, compute the noisy image for the # next timestep. if i < steps - 1: # If eta > 0, adjust the scaling factor for the predicted noise # downward according to the amount of additional noise to add ddim_sigma = eta * (sigmas[i + 1]**2 / sigmas[i]**2).sqrt() * \ (1 - alphas[i]**2 / alphas[i + 1]**2).sqrt() adjusted_sigma = (sigmas[i + 1]**2 - ddim_sigma**2).sqrt() # Recombine the predicted noise and predicted denoised image in the # correct proportions for the next step x = pred * alphas[i + 1] + eps * adjusted_sigma # Add the correct amount of fresh noise if eta: x += torch.randn_like(x) * ddim_sigma # If we are on the last timestep, output the denoised image return pred # Soft mask inpainting is just shrinking hard (binary) mask inpainting # Given a float-valued soft mask (values between 0 and 1), get the binary mask for this particular step @spaces.GPU def get_bmask(i, steps, mask): strength = (i+1)/(steps) # convert to binary mask bmask = torch.where(mask<=strength,1,0) return bmask @spaces.GPU def make_cond_model_fn(model, cond_fn): def cond_model_fn(x, sigma, **kwargs): with torch.enable_grad(): x = x.detach().requires_grad_() denoised = model(x, sigma, **kwargs) cond_grad = cond_fn(x, sigma, denoised=denoised, **kwargs).detach() cond_denoised = denoised.detach() + cond_grad * K.utils.append_dims(sigma**2, x.ndim) return cond_denoised return cond_model_fn # Uses k-diffusion from https://github.com/crowsonkb/k-diffusion # init_data is init_audio as latents (if this is latent diffusion) # For sampling, set both init_data and mask to None # For variations, set init_data # For inpainting, set both init_data & mask @spaces.GPU def sample_k( model_fn, noise, init_data=None, mask=None, steps=100, sampler_type="dpmpp-2m-sde", sigma_min=0.5, sigma_max=50, rho=1.0, device="cuda", callback=None, cond_fn=None, model_config=None, repaint=1, **extra_args ): #denoiser = K.external.VDenoiser(model_fn) denoiser = K.Denoiser(model_fn, sigma_data=model_config['sigma_data']) if cond_fn is not None: denoiser = make_cond_model_fn(denoiser, cond_fn) # Make the list of sigmas. Sigma values are scalars related to the amount of noise each denoising step has #sigmas = K.sampling.get_sigmas_polyexponential(steps, sigma_min, sigma_max, rho, device=device) sigmas = K.sampling.get_sigmas_karras(steps, sigma_min, sigma_max, rho=7., device=device) print("sigmas[0] = ", sigmas[0]) # Scale the initial noise by sigma noise = noise * sigmas[0] wrapped_callback = callback if mask is None and init_data is not None: # VARIATION (no inpainting) # set the initial latent to the init_data, and noise it with initial sigma x = init_data + noise elif mask is not None and init_data is not None: # INPAINTING bmask = get_bmask(0, steps, mask) # initial noising input_noised = init_data + noise # set the initial latent to a mix of init_data and noise, based on step 0's binary mask x = input_noised * bmask + noise * (1-bmask) # define the inpainting callback function (Note: side effects, it mutates x) # See https://github.com/crowsonkb/k-diffusion/blob/master/k_diffusion/sampling.py#L596C13-L596C105 # callback({'x': x, 'i': i, 'sigma': sigmas[i], 'sigma_hat': sigmas[i], 'denoised': denoised}) # This is called immediately after `denoised = model(x, sigmas[i] * s_in, **extra_args)` def inpainting_callback(args): i = args["i"] x = args["x"] sigma = args["sigma"] #denoised = args["denoised"] # noise the init_data input with this step's appropriate amount of noise input_noised = init_data + torch.randn_like(init_data) * sigma # shrinking hard mask bmask = get_bmask(i, steps, mask) # mix input_noise with x, using binary mask new_x = input_noised * bmask + x * (1-bmask) # mutate x x[:,:,:] = new_x[:,:,:] # wrap together the inpainting callback and the user-submitted callback. if callback is None: wrapped_callback = inpainting_callback else: wrapped_callback = lambda args: (inpainting_callback(args), callback(args)) else: # SAMPLING # set the initial latent to noise x = noise print("sample_k: x.min, x.max = ", x.min(), x.max()) print(f"sample_k: key, val.dtype = ",[ (key, val.dtype if val is not None else val) for key,val in extra_args.items()]) with torch.cuda.amp.autocast(): if sampler_type == "k-heun": return K.sampling.sample_heun(denoiser, x, sigmas, disable=False, callback=wrapped_callback, extra_args=extra_args) elif sampler_type == "k-lms": return K.sampling.sample_lms(denoiser, x, sigmas, disable=False, callback=wrapped_callback, extra_args=extra_args) elif sampler_type == "k-dpmpp-2s-ancestral": return K.sampling.sample_dpmpp_2s_ancestral(denoiser, x, sigmas, disable=False, callback=wrapped_callback, extra_args=extra_args) elif sampler_type == "k-dpm-2": return K.sampling.sample_dpm_2(denoiser, x, sigmas, disable=False, callback=wrapped_callback, extra_args=extra_args) elif sampler_type == "k-dpm-fast": return K.sampling.sample_dpm_fast(denoiser, x, sigma_min, sigma_max, steps, disable=False, callback=wrapped_callback, extra_args=extra_args) elif sampler_type == "k-dpm-adaptive": return K.sampling.sample_dpm_adaptive(denoiser, x, sigma_min, sigma_max, rtol=0.01, atol=0.01, disable=False, callback=wrapped_callback, extra_args=extra_args) elif sampler_type == "dpmpp-2m-sde": return K.sampling.sample_dpmpp_2m_sde(denoiser, x, sigmas, disable=False, callback=wrapped_callback, extra_args=extra_args) elif sampler_type == "my-dpmpp-2m-sde": return my_dpmpp_2m_sde(denoiser, x, sigmas, disable=False, callback=wrapped_callback, repaint=repaint, extra_args=extra_args) elif sampler_type == "dpmpp-3m-sde": return K.sampling.sample_dpmpp_3m_sde(denoiser, x, sigmas, disable=False, callback=wrapped_callback, extra_args=extra_args) elif sampler_type == "my-sample-euler": return my_sample_euler(denoiser, x, sigmas, disable=False, callback=wrapped_callback, repaint=repaint, extra_args=extra_args) ## ---- end stable-audio-tools @spaces.GPU def infer_mask_from_init_img(img, mask_with='white'): """given an image with mask areas marked, extract the mask itself note, this works whether image is normalized on 0..1 or -1..1, but not 0..255""" print("Inferring mask from init_img") assert mask_with in ['blue','white'] if not torch.is_tensor(img): img = ToTensor()(img) mask = torch.zeros(img.shape[-2:]) if mask_with == 'white': mask[ (img[0,:,:]==1) & (img[1,:,:]==1) & (img[2,:,:]==1)] = 1 elif mask_with == 'blue': mask[img[2,:,:]==1] = 1 # blue return mask*1.0 @spaces.GPU def grow_mask(init_mask, grow_by=2): "adds a border of grow_by pixels to the mask, by growing it grow_by times. If grow_by=0, does nothing" new_mask = init_mask.clone() for c in range(grow_by): # wherever mask is bordered by a 1, set it to 1 new_mask[1:-1,1:-1] = (new_mask[1:-1,1:-1] + new_mask[0:-2,1:-1] + new_mask[2:,1:-1] + new_mask[1:-1,0:-2] + new_mask[1:-1,2:]) > 0 return new_mask @spaces.GPU def add_seeding(init_image, init_mask, grow_by=0, seed_scale=1.0): "adds extra noise inside mask" init_mask = grow_mask(init_mask, grow_by=grow_by) # make the mask bigger if not torch.is_tensor(init_image): init_image = ToTensor()(init_image) init_image = init_image.clone() # wherever mask is 1, set first set init_image to min value init_image[:,init_mask == 1] = init_image.min() init_image = init_image + seed_scale*torch.randn_like(init_image) * (init_mask) # add noise where mask is 1 # wherever the mask is 1, set the blue channel to -1.0, otherwise leave it alone init_image[2,:,:] = init_image[2,:,:] * (1-init_mask) - 1.0*init_mask return init_image @spaces.GPU def get_init_image_and_mask(args, device): convert_tensor = transforms.ToTensor() init_image = Image.open(args.init_image).convert('RGB') init_image = convert_tensor(init_image) #normalize image from 0..1 to -1..1 init_image = (2.0 * init_image) - 1.0 init_mask = torch.ones(init_image.shape[-2:]) # ones are where stuff will change, zeros will stay the same inpaint_task = 'infer' # infer mask from init_image assert inpaint_task in ['accomp','chords','melody','nucleation','notes','continue','infer'] if inpaint_task in ['melody','accomp']: init_mask[0:70,:] = 0 # zero out a melody strip of image near top init_mask[128+0:128+70,:] = 0 # zero out a melody strip of image along bottom row if inpaint_task == 'melody': init_mask = 1 - init_mask elif inpaint_task in ['notes','chords']: # keep chords only #init_mask = torch.ones_like(x) init_mask[0:CHORD_BORDER,:] = 0 # top row of 256x256 init_mask[128-CHORD_BORDER:128+CHORD_BORDER,:] = 0 # middle rows of 256x256 init_mask[-CHORD_BORDER:,:] = 0 # bottom row of 256x256 if inpaint_task == 'chords': init_mask = 1 - init_mask # inverse: genereate chords given notes elif inpaint_task == 'continue': init_mask[0:128,:] = 0 # remember it's a square, so just mask out the bottom half elif inpaint_task == 'nucleation': # set mask to wherever the blue channel is >= 0.9 init_mask = (init_image[2,:,:] > 0.0)*1.0 # zero out init mask in top and bottom borders init_mask[0:CHORD_BORDER,:] = 0 init_mask[-CHORD_BORDER:,:] = 0 init_mask[128-CHORD_BORDER:128+CHORD_BORDER,:] = 0 # remove all blue in init_image between the borders init_image[2,CHORD_BORDER:128-CHORD_BORDER,:] = -1.0 init_image[2,128+CHORD_BORDER:-CHORD_BORDER,:] = -1.0 # grow the sides of the mask by one pixel: # wherever mask is zero but is bordered by a 1, set it to 1 init_mask[1:-1,1:-1] = (init_mask[1:-1,1:-1] + init_mask[0:-2,1:-1] + init_mask[2:,1:-1] + init_mask[1:-1,0:-2] + init_mask[1:-1,2:]) > 0 #init_mask[1:-1,1:-1] = (init_mask[1:-1,1:-1] + init_mask[0:-2,1:-1] + init_mask[2:,1:-1] + init_mask[1:-1,0:-2] + init_mask[1:-1,2:]) > 0 elif inpaint_task == 'infer': init_mask = infer_mask_from_init_img(init_image, mask_with='white') # Also black out init_image wherever init mask is 1 init_image[:,init_mask == 1] = init_image.min() if args.seed_scale > 0: # driving nucleation print("Seeding nucleation, seed_scale = ", args.seed_scale) init_image = add_seeding(init_image, init_mask, grow_by=0, seed_scale=args.seed_scale) # remove any blue in middle of init image print("init_image.shape = ", init_image.shape) init_image[2,CHORD_BORDER:128-CHORD_BORDER,:] = -1.0 init_image[2,128+CHORD_BORDER:-CHORD_BORDER,:] = -1.0 # Debugging: output some images so we can see what's going on init_mask_t = init_mask.float()*255 # convert mask to 0..255 for writing as image # Convert to NumPy array and rearrange dimensions init_mask_img_numpy = init_mask_t.byte().cpu().numpy()#.transpose(1, 2, 0) init_mask_debug_img = Image.fromarray(init_mask_img_numpy) init_mask_debug_img.save("init_mask_debug.png") init_image_debug_img = Image.fromarray((init_image*127.5+127.5).byte().cpu().numpy().transpose(1,2,0)) init_image_debug_img.save("init_image_debug.png") # reshape image and mask to be 4D tensors init_image = init_image.unsqueeze(0).repeat(args.batch_size, 1, 1, 1) init_mask = init_mask.unsqueeze(0).unsqueeze(1).repeat(args.batch_size,3,1,1).float() return init_image.to(device), init_mask.to(device) @spaces.GPU def main(): global init_image, init_mask p = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.ArgumentDefaultsHelpFormatter) p.add_argument('--batch-size', type=int, default=64, help='the batch size') p.add_argument('--checkpoint', type=Path, required=True, help='the checkpoint to use') p.add_argument('--config', type=Path, help='the model config') p.add_argument('-n', type=int, default=64, help='the number of images to sample') p.add_argument('--prefix', type=str, default='out', help='the output prefix') p.add_argument('--repaint', type=int, default=1, help='number of (re)paint steps') p.add_argument('--steps', type=int, default=50, help='the number of denoising steps') p.add_argument('--seed-scale', type=float, default=0.0, help='strength of nucleation seeding') p.add_argument('--init-image', type=Path, default=None, help='the initial image') p.add_argument('--init-strength', type=float, default=1., help='strength of init image') args = p.parse_args() print("args =", args, flush=True) config = K.config.load_config(args.config if args.config else args.checkpoint) model_config = config['model'] # TODO: allow non-square input sizes assert len(model_config['input_size']) == 2 and model_config['input_size'][0] == model_config['input_size'][1] size = model_config['input_size'] accelerator = accelerate.Accelerator() device = accelerator.device print('Using device:', device, flush=True) inner_model = K.config.make_model(config).eval().requires_grad_(False).to(device) cse = None # ChordSeqEncoder().eval().requires_grad_(False).to(device) # add chord embedding-maker to main model if cse is not None: inner_model.cse = cse try: inner_model.load_state_dict(safetorch.load_file(args.checkpoint)) except: #ckpt = torch.load(args.checkpoint).to(device) ckpt = torch.load(args.checkpoint, map_location='cpu') inner_model.load_state_dict(ckpt['model']) accelerator.print('Parameters:', K.utils.n_params(inner_model)) model = K.Denoiser(inner_model, sigma_data=model_config['sigma_data']) sigma_min = model_config['sigma_min'] sigma_max = model_config['sigma_max'] # SHH modified torch.set_float32_matmul_precision('high') #class_cond = torch.tensor([0]).to(device) #num_classes = 10 #class_cond = torch.remainder(torch.arange(0, args.n), num_classes).int().to(device) #extra_args = {'class_cond':class_cond} extra_args = {} init_image, init_mask = None, None if args.init_image is not None: init_image, init_mask = get_init_image_and_mask(args, device) init_image = init_image.to(device) init_mask = init_mask.to(device) @torch.no_grad() @K.utils.eval_mode(model) def run(): global init_image, init_mask if accelerator.is_local_main_process: tqdm.write('Sampling...') sigmas = K.sampling.get_sigmas_karras(args.steps, sigma_min, sigma_max, rho=7., device=device) #ddpm_sampler = DDPM(model) #model_fn = model #ddpm_sampler = K.external.VDenoiser(model_fn) @spaces.GPU def sample_fn(n, debug=True): x = torch.randn([n, model_config['input_channels'], size[0], size[1]], device=device) * sigma_max print("n, sigma_max, x.min, x.max = ", n, sigma_max, x.min(), x.max()) if args.init_image is not None: init_data, mask = get_init_image_and_mask(args, device) init_data = args.seed_scale*x*mask + (1-mask)*init_data # extra nucleation? if cse is not None: chord_cond = img_batch_to_seq_emb(init_data, inner_model.cse).to(device) else: chord_cond = None #print("init_data.shape, init_data.min, init_data.max = ", init_data.shape, init_data.min(), init_data.max()) else: init_data, mask, chord_cond = None, None, None # chord_cond doesn't work anyway so f it: chord_cond = None print("chord_cond = ", chord_cond) if chord_cond is not None: extra_args['chord_cond'] = chord_cond # these two work: #x_0 = K.sampling.sample_lms(model, x, sigmas, disable=not accelerator.is_local_main_process, extra_args=extra_args) #x_0 = K.sampling.sample_dpmpp_2m_sde(model, x, sigmas, disable=not accelerator.is_local_main_process, extra_args=extra_args) noise = torch.randn([n, model_config['input_channels'], size[0], size[1]], device=device) sampler_type="my-dpmpp-2m-sde" # "k-lms" #sampler_type="my-sample-euler" #sampler_type="dpmpp-2m-sde" #sampler_type = "dpmpp-3m-sde" #sampler_type = "k-dpmpp-2s-ancestral" print("dtypes:", [x.dtype if x is not None else None for x in [noise, init_data, mask, chord_cond]]) x_0 = sample_k(inner_model, noise, sampler_type=sampler_type, init_data=init_data, mask=mask, steps=args.steps, sigma_min=sigma_min, sigma_max=sigma_max, rho=7., device=device, model_config=model_config, repaint=args.repaint, **extra_args) #x_0 = sample_k(inner_model, noise, sampler_type="dpmpp-2m-sde", steps=100, sigma_min=0.5, sigma_max=50, rho=1., device=device, model_config=model_config, **extra_args) print("x_0.min, x_0.max = ", x_0.min(), x_0.max()) if x_0.isnan().any(): assert False, "x_0 has NaNs" # do gpu garbage collection before proceeding torch.cuda.empty_cache() return x_0 x_0 = K.evaluation.compute_features(accelerator, sample_fn, lambda x: x, args.n, args.batch_size) if accelerator.is_main_process: for i, out in enumerate(x_0): filename = f'{args.prefix}_{i:05}.png' K.utils.to_pil_image(out).save(filename) try: run() except KeyboardInterrupt: pass if __name__ == '__main__': main()