mirror of
https://github.com/AUTOMATIC1111/stable-diffusion-webui.git
synced 2024-06-07 21:20:49 +00:00
96 lines
3.3 KiB
Python
96 lines
3.3 KiB
Python
from collections import namedtuple
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import numpy as np
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import torch
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from PIL import Image
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from modules import devices, processing, images, sd_vae_approx, sd_samplers, sd_vae_taesd
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from modules.shared import opts, state
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import modules.shared as shared
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SamplerData = namedtuple('SamplerData', ['name', 'constructor', 'aliases', 'options'])
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def setup_img2img_steps(p, steps=None):
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if opts.img2img_fix_steps or steps is not None:
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requested_steps = (steps or p.steps)
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steps = int(requested_steps / min(p.denoising_strength, 0.999)) if p.denoising_strength > 0 else 0
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t_enc = requested_steps - 1
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else:
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steps = p.steps
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t_enc = int(min(p.denoising_strength, 0.999) * steps)
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return steps, t_enc
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approximation_indexes = {"Full": 0, "Approx NN": 1, "Approx cheap": 2, "TAESD": 3}
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def single_sample_to_image(sample, approximation=None):
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if approximation is None:
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approximation = approximation_indexes.get(opts.show_progress_type, 0)
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if approximation == 2:
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x_sample = sd_vae_approx.cheap_approximation(sample) * 0.5 + 0.5
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elif approximation == 1:
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x_sample = sd_vae_approx.model()(sample.to(devices.device, devices.dtype).unsqueeze(0))[0].detach() * 0.5 + 0.5
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elif approximation == 3:
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x_sample = sample * 1.5
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x_sample = sd_vae_taesd.model()(x_sample.to(devices.device, devices.dtype).unsqueeze(0))[0].detach()
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else:
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x_sample = processing.decode_first_stage(shared.sd_model, sample.unsqueeze(0))[0] * 0.5 + 0.5
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x_sample = torch.clamp(x_sample, min=0.0, max=1.0)
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x_sample = 255. * np.moveaxis(x_sample.cpu().numpy(), 0, 2)
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x_sample = x_sample.astype(np.uint8)
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return Image.fromarray(x_sample)
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def sample_to_image(samples, index=0, approximation=None):
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return single_sample_to_image(samples[index], approximation)
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def samples_to_image_grid(samples, approximation=None):
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return images.image_grid([single_sample_to_image(sample, approximation) for sample in samples])
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def store_latent(decoded):
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state.current_latent = decoded
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if opts.live_previews_enable and opts.show_progress_every_n_steps > 0 and shared.state.sampling_step % opts.show_progress_every_n_steps == 0:
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if not shared.parallel_processing_allowed:
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shared.state.assign_current_image(sample_to_image(decoded))
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def is_sampler_using_eta_noise_seed_delta(p):
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"""returns whether sampler from config will use eta noise seed delta for image creation"""
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sampler_config = sd_samplers.find_sampler_config(p.sampler_name)
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eta = p.eta
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if eta is None and p.sampler is not None:
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eta = p.sampler.eta
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if eta is None and sampler_config is not None:
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eta = 0 if sampler_config.options.get("default_eta_is_0", False) else 1.0
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if eta == 0:
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return False
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return sampler_config.options.get("uses_ensd", False)
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class InterruptedException(BaseException):
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pass
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if opts.randn_source == "CPU":
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import torchsde._brownian.brownian_interval
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def torchsde_randn(size, dtype, device, seed):
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generator = torch.Generator(devices.cpu).manual_seed(int(seed))
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return torch.randn(size, dtype=dtype, device=devices.cpu, generator=generator).to(device)
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torchsde._brownian.brownian_interval._randn = torchsde_randn
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