From aa54a9d41680051b4b28b0655f8d61a2f23600b1 Mon Sep 17 00:00:00 2001 From: AUTOMATIC <16777216c@gmail.com> Date: Mon, 30 Jan 2023 09:51:06 +0300 Subject: [PATCH] split compvis sampler and shared sampler stuff into their own files --- modules/sd_samplers.py | 243 ++--------------- modules/sd_samplers_common.py | 479 +-------------------------------- modules/sd_samplers_compvis.py | 423 +---------------------------- 3 files changed, 28 insertions(+), 1117 deletions(-) diff --git a/modules/sd_samplers.py b/modules/sd_samplers.py index a7910b56..9a29f1ae 100644 --- a/modules/sd_samplers.py +++ b/modules/sd_samplers.py @@ -1,22 +1,18 @@ -from collections import namedtuple, deque -import numpy as np -from math import floor +from collections import deque import torch -import tqdm -from PIL import Image import inspect import k_diffusion.sampling -import torchsde._brownian.brownian_interval import ldm.models.diffusion.ddim import ldm.models.diffusion.plms -from modules import prompt_parser, devices, processing, images, sd_vae_approx +from modules import prompt_parser, devices, sd_samplers_common, sd_samplers_compvis -from modules.shared import opts, cmd_opts, state +from modules.shared import opts, state import modules.shared as shared from modules.script_callbacks import CFGDenoiserParams, cfg_denoiser_callback +# imports for functions that previously were here and are used by other modules +from modules.sd_samplers_common import samples_to_image_grid, sample_to_image -SamplerData = namedtuple('SamplerData', ['name', 'constructor', 'aliases', 'options']) samplers_k_diffusion = [ ('Euler a', 'sample_euler_ancestral', ['k_euler_a', 'k_euler_ancestral'], {}), @@ -39,15 +35,15 @@ samplers_k_diffusion = [ ] samplers_data_k_diffusion = [ - SamplerData(label, lambda model, funcname=funcname: KDiffusionSampler(funcname, model), aliases, options) + sd_samplers_common.SamplerData(label, lambda model, funcname=funcname: KDiffusionSampler(funcname, model), aliases, options) for label, funcname, aliases, options in samplers_k_diffusion if hasattr(k_diffusion.sampling, funcname) ] all_samplers = [ *samplers_data_k_diffusion, - SamplerData('DDIM', lambda model: VanillaStableDiffusionSampler(ldm.models.diffusion.ddim.DDIMSampler, model), [], {}), - SamplerData('PLMS', lambda model: VanillaStableDiffusionSampler(ldm.models.diffusion.plms.PLMSSampler, model), [], {}), + sd_samplers_common.SamplerData('DDIM', lambda model: sd_samplers_compvis.VanillaStableDiffusionSampler(ldm.models.diffusion.ddim.DDIMSampler, model), [], {}), + sd_samplers_common.SamplerData('PLMS', lambda model: sd_samplers_compvis.VanillaStableDiffusionSampler(ldm.models.diffusion.plms.PLMSSampler, model), [], {}), ] all_samplers_map = {x.name: x for x in all_samplers} @@ -95,202 +91,6 @@ sampler_extra_params = { } -def setup_img2img_steps(p, steps=None): - if opts.img2img_fix_steps or steps is not None: - requested_steps = (steps or p.steps) - steps = int(requested_steps / min(p.denoising_strength, 0.999)) if p.denoising_strength > 0 else 0 - t_enc = requested_steps - 1 - else: - steps = p.steps - t_enc = int(min(p.denoising_strength, 0.999) * steps) - - return steps, t_enc - - -approximation_indexes = {"Full": 0, "Approx NN": 1, "Approx cheap": 2} - - -def single_sample_to_image(sample, approximation=None): - if approximation is None: - approximation = approximation_indexes.get(opts.show_progress_type, 0) - - if approximation == 2: - x_sample = sd_vae_approx.cheap_approximation(sample) - elif approximation == 1: - x_sample = sd_vae_approx.model()(sample.to(devices.device, devices.dtype).unsqueeze(0))[0].detach() - else: - x_sample = processing.decode_first_stage(shared.sd_model, sample.unsqueeze(0))[0] - - x_sample = torch.clamp((x_sample + 1.0) / 2.0, min=0.0, max=1.0) - x_sample = 255. * np.moveaxis(x_sample.cpu().numpy(), 0, 2) - x_sample = x_sample.astype(np.uint8) - return Image.fromarray(x_sample) - - -def sample_to_image(samples, index=0, approximation=None): - return single_sample_to_image(samples[index], approximation) - - -def samples_to_image_grid(samples, approximation=None): - return images.image_grid([single_sample_to_image(sample, approximation) for sample in samples]) - - -def store_latent(decoded): - state.current_latent = decoded - - 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: - if not shared.parallel_processing_allowed: - shared.state.assign_current_image(sample_to_image(decoded)) - - -class InterruptedException(BaseException): - pass - - -class VanillaStableDiffusionSampler: - def __init__(self, constructor, sd_model): - self.sampler = constructor(sd_model) - self.is_plms = hasattr(self.sampler, 'p_sample_plms') - self.orig_p_sample_ddim = self.sampler.p_sample_plms if self.is_plms else self.sampler.p_sample_ddim - self.mask = None - self.nmask = None - self.init_latent = None - self.sampler_noises = None - self.step = 0 - self.stop_at = None - self.eta = None - self.default_eta = 0.0 - self.config = None - self.last_latent = None - - self.conditioning_key = sd_model.model.conditioning_key - - def number_of_needed_noises(self, p): - return 0 - - def launch_sampling(self, steps, func): - state.sampling_steps = steps - state.sampling_step = 0 - - try: - return func() - except InterruptedException: - return self.last_latent - - def p_sample_ddim_hook(self, x_dec, cond, ts, unconditional_conditioning, *args, **kwargs): - if state.interrupted or state.skipped: - raise InterruptedException - - if self.stop_at is not None and self.step > self.stop_at: - raise InterruptedException - - # Have to unwrap the inpainting conditioning here to perform pre-processing - image_conditioning = None - if isinstance(cond, dict): - image_conditioning = cond["c_concat"][0] - cond = cond["c_crossattn"][0] - unconditional_conditioning = unconditional_conditioning["c_crossattn"][0] - - conds_list, tensor = prompt_parser.reconstruct_multicond_batch(cond, self.step) - unconditional_conditioning = prompt_parser.reconstruct_cond_batch(unconditional_conditioning, self.step) - - assert all([len(conds) == 1 for conds in conds_list]), 'composition via AND is not supported for DDIM/PLMS samplers' - cond = tensor - - # for DDIM, shapes must match, we can't just process cond and uncond independently; - # filling unconditional_conditioning with repeats of the last vector to match length is - # not 100% correct but should work well enough - if unconditional_conditioning.shape[1] < cond.shape[1]: - last_vector = unconditional_conditioning[:, -1:] - last_vector_repeated = last_vector.repeat([1, cond.shape[1] - unconditional_conditioning.shape[1], 1]) - unconditional_conditioning = torch.hstack([unconditional_conditioning, last_vector_repeated]) - elif unconditional_conditioning.shape[1] > cond.shape[1]: - unconditional_conditioning = unconditional_conditioning[:, :cond.shape[1]] - - if self.mask is not None: - img_orig = self.sampler.model.q_sample(self.init_latent, ts) - x_dec = img_orig * self.mask + self.nmask * x_dec - - # Wrap the image conditioning back up since the DDIM code can accept the dict directly. - # Note that they need to be lists because it just concatenates them later. - if image_conditioning is not None: - cond = {"c_concat": [image_conditioning], "c_crossattn": [cond]} - unconditional_conditioning = {"c_concat": [image_conditioning], "c_crossattn": [unconditional_conditioning]} - - res = self.orig_p_sample_ddim(x_dec, cond, ts, unconditional_conditioning=unconditional_conditioning, *args, **kwargs) - - if self.mask is not None: - self.last_latent = self.init_latent * self.mask + self.nmask * res[1] - else: - self.last_latent = res[1] - - store_latent(self.last_latent) - - self.step += 1 - state.sampling_step = self.step - shared.total_tqdm.update() - - return res - - def initialize(self, p): - self.eta = p.eta if p.eta is not None else opts.eta_ddim - - for fieldname in ['p_sample_ddim', 'p_sample_plms']: - if hasattr(self.sampler, fieldname): - setattr(self.sampler, fieldname, self.p_sample_ddim_hook) - - self.mask = p.mask if hasattr(p, 'mask') else None - self.nmask = p.nmask if hasattr(p, 'nmask') else None - - def adjust_steps_if_invalid(self, p, num_steps): - if (self.config.name == 'DDIM' and p.ddim_discretize == 'uniform') or (self.config.name == 'PLMS'): - valid_step = 999 / (1000 // num_steps) - if valid_step == floor(valid_step): - return int(valid_step) + 1 - - return num_steps - - def sample_img2img(self, p, x, noise, conditioning, unconditional_conditioning, steps=None, image_conditioning=None): - steps, t_enc = setup_img2img_steps(p, steps) - steps = self.adjust_steps_if_invalid(p, steps) - self.initialize(p) - - self.sampler.make_schedule(ddim_num_steps=steps, ddim_eta=self.eta, ddim_discretize=p.ddim_discretize, verbose=False) - x1 = self.sampler.stochastic_encode(x, torch.tensor([t_enc] * int(x.shape[0])).to(shared.device), noise=noise) - - self.init_latent = x - self.last_latent = x - self.step = 0 - - # Wrap the conditioning models with additional image conditioning for inpainting model - if image_conditioning is not None: - conditioning = {"c_concat": [image_conditioning], "c_crossattn": [conditioning]} - unconditional_conditioning = {"c_concat": [image_conditioning], "c_crossattn": [unconditional_conditioning]} - - samples = self.launch_sampling(t_enc + 1, lambda: self.sampler.decode(x1, conditioning, t_enc, unconditional_guidance_scale=p.cfg_scale, unconditional_conditioning=unconditional_conditioning)) - - return samples - - def sample(self, p, x, conditioning, unconditional_conditioning, steps=None, image_conditioning=None): - self.initialize(p) - - self.init_latent = None - self.last_latent = x - self.step = 0 - - steps = self.adjust_steps_if_invalid(p, steps or p.steps) - - # Wrap the conditioning models with additional image conditioning for inpainting model - # dummy_for_plms is needed because PLMS code checks the first item in the dict to have the right shape - if image_conditioning is not None: - conditioning = {"dummy_for_plms": np.zeros((conditioning.shape[0],)), "c_crossattn": [conditioning], "c_concat": [image_conditioning]} - unconditional_conditioning = {"c_crossattn": [unconditional_conditioning], "c_concat": [image_conditioning]} - - samples_ddim = self.launch_sampling(steps, lambda: 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=self.eta)[0]) - - return samples_ddim - - class CFGDenoiser(torch.nn.Module): def __init__(self, model): super().__init__() @@ -312,7 +112,7 @@ class CFGDenoiser(torch.nn.Module): def forward(self, x, sigma, uncond, cond, cond_scale, image_cond): if state.interrupted or state.skipped: - raise InterruptedException + raise sd_samplers_common.InterruptedException conds_list, tensor = prompt_parser.reconstruct_multicond_batch(cond, self.step) uncond = prompt_parser.reconstruct_cond_batch(uncond, self.step) @@ -354,9 +154,9 @@ class CFGDenoiser(torch.nn.Module): devices.test_for_nans(x_out, "unet") if opts.live_preview_content == "Prompt": - store_latent(x_out[0:uncond.shape[0]]) + sd_samplers_common.store_latent(x_out[0:uncond.shape[0]]) elif opts.live_preview_content == "Negative prompt": - store_latent(x_out[-uncond.shape[0]:]) + sd_samplers_common.store_latent(x_out[-uncond.shape[0]:]) denoised = self.combine_denoised(x_out, conds_list, uncond, cond_scale) @@ -395,19 +195,6 @@ class TorchHijack: return torch.randn_like(x) -# MPS fix for randn in torchsde -def torchsde_randn(size, dtype, device, seed): - if device.type == 'mps': - generator = torch.Generator(devices.cpu).manual_seed(int(seed)) - return torch.randn(size, dtype=dtype, device=devices.cpu, generator=generator).to(device) - else: - generator = torch.Generator(device).manual_seed(int(seed)) - return torch.randn(size, dtype=dtype, device=device, generator=generator) - - -torchsde._brownian.brownian_interval._randn = torchsde_randn - - class KDiffusionSampler: def __init__(self, funcname, sd_model): denoiser = k_diffusion.external.CompVisVDenoiser if sd_model.parameterization == "v" else k_diffusion.external.CompVisDenoiser @@ -430,11 +217,11 @@ class KDiffusionSampler: step = d['i'] latent = d["denoised"] if opts.live_preview_content == "Combined": - store_latent(latent) + sd_samplers_common.store_latent(latent) self.last_latent = latent if self.stop_at is not None and step > self.stop_at: - raise InterruptedException + raise sd_samplers_common.InterruptedException state.sampling_step = step shared.total_tqdm.update() @@ -445,7 +232,7 @@ class KDiffusionSampler: try: return func() - except InterruptedException: + except sd_samplers_common.InterruptedException: return self.last_latent def number_of_needed_noises(self, p): @@ -492,7 +279,7 @@ class KDiffusionSampler: return sigmas def sample_img2img(self, p, x, noise, conditioning, unconditional_conditioning, steps=None, image_conditioning=None): - steps, t_enc = setup_img2img_steps(p, steps) + steps, t_enc = sd_samplers_common.setup_img2img_steps(p, steps) sigmas = self.get_sigmas(p, steps) diff --git a/modules/sd_samplers_common.py b/modules/sd_samplers_common.py index a7910b56..5b06e341 100644 --- a/modules/sd_samplers_common.py +++ b/modules/sd_samplers_common.py @@ -1,99 +1,15 @@ from collections import namedtuple, deque import numpy as np -from math import floor import torch -import tqdm from PIL import Image -import inspect -import k_diffusion.sampling import torchsde._brownian.brownian_interval -import ldm.models.diffusion.ddim -import ldm.models.diffusion.plms -from modules import prompt_parser, devices, processing, images, sd_vae_approx +from modules import devices, processing, images, sd_vae_approx -from modules.shared import opts, cmd_opts, state +from modules.shared import opts, state import modules.shared as shared -from modules.script_callbacks import CFGDenoiserParams, cfg_denoiser_callback - SamplerData = namedtuple('SamplerData', ['name', 'constructor', 'aliases', 'options']) -samplers_k_diffusion = [ - ('Euler a', 'sample_euler_ancestral', ['k_euler_a', 'k_euler_ancestral'], {}), - ('Euler', 'sample_euler', ['k_euler'], {}), - ('LMS', 'sample_lms', ['k_lms'], {}), - ('Heun', 'sample_heun', ['k_heun'], {}), - ('DPM2', 'sample_dpm_2', ['k_dpm_2'], {'discard_next_to_last_sigma': True}), - ('DPM2 a', 'sample_dpm_2_ancestral', ['k_dpm_2_a'], {'discard_next_to_last_sigma': True}), - ('DPM++ 2S a', 'sample_dpmpp_2s_ancestral', ['k_dpmpp_2s_a'], {}), - ('DPM++ 2M', 'sample_dpmpp_2m', ['k_dpmpp_2m'], {}), - ('DPM++ SDE', 'sample_dpmpp_sde', ['k_dpmpp_sde'], {}), - ('DPM fast', 'sample_dpm_fast', ['k_dpm_fast'], {}), - ('DPM adaptive', 'sample_dpm_adaptive', ['k_dpm_ad'], {}), - ('LMS Karras', 'sample_lms', ['k_lms_ka'], {'scheduler': 'karras'}), - ('DPM2 Karras', 'sample_dpm_2', ['k_dpm_2_ka'], {'scheduler': 'karras', 'discard_next_to_last_sigma': True}), - ('DPM2 a Karras', 'sample_dpm_2_ancestral', ['k_dpm_2_a_ka'], {'scheduler': 'karras', 'discard_next_to_last_sigma': True}), - ('DPM++ 2S a Karras', 'sample_dpmpp_2s_ancestral', ['k_dpmpp_2s_a_ka'], {'scheduler': 'karras'}), - ('DPM++ 2M Karras', 'sample_dpmpp_2m', ['k_dpmpp_2m_ka'], {'scheduler': 'karras'}), - ('DPM++ SDE Karras', 'sample_dpmpp_sde', ['k_dpmpp_sde_ka'], {'scheduler': 'karras'}), -] - -samplers_data_k_diffusion = [ - SamplerData(label, lambda model, funcname=funcname: KDiffusionSampler(funcname, model), aliases, options) - for label, funcname, aliases, options in samplers_k_diffusion - if hasattr(k_diffusion.sampling, funcname) -] - -all_samplers = [ - *samplers_data_k_diffusion, - SamplerData('DDIM', lambda model: VanillaStableDiffusionSampler(ldm.models.diffusion.ddim.DDIMSampler, model), [], {}), - SamplerData('PLMS', lambda model: VanillaStableDiffusionSampler(ldm.models.diffusion.plms.PLMSSampler, model), [], {}), -] -all_samplers_map = {x.name: x for x in all_samplers} - -samplers = [] -samplers_for_img2img = [] -samplers_map = {} - - -def create_sampler(name, model): - if name is not None: - config = all_samplers_map.get(name, None) - else: - config = all_samplers[0] - - assert config is not None, f'bad sampler name: {name}' - - sampler = config.constructor(model) - sampler.config = config - - return sampler - - -def set_samplers(): - global samplers, samplers_for_img2img - - hidden = set(opts.hide_samplers) - hidden_img2img = set(opts.hide_samplers + ['PLMS']) - - samplers = [x for x in all_samplers if x.name not in hidden] - samplers_for_img2img = [x for x in all_samplers if x.name not in hidden_img2img] - - samplers_map.clear() - for sampler in all_samplers: - samplers_map[sampler.name.lower()] = sampler.name - for alias in sampler.aliases: - samplers_map[alias.lower()] = sampler.name - - -set_samplers() - -sampler_extra_params = { - 'sample_euler': ['s_churn', 's_tmin', 's_tmax', 's_noise'], - 'sample_heun': ['s_churn', 's_tmin', 's_tmax', 's_noise'], - 'sample_dpm_2': ['s_churn', 's_tmin', 's_tmax', 's_noise'], -} - def setup_img2img_steps(p, steps=None): if opts.img2img_fix_steps or steps is not None: @@ -147,254 +63,6 @@ class InterruptedException(BaseException): pass -class VanillaStableDiffusionSampler: - def __init__(self, constructor, sd_model): - self.sampler = constructor(sd_model) - self.is_plms = hasattr(self.sampler, 'p_sample_plms') - self.orig_p_sample_ddim = self.sampler.p_sample_plms if self.is_plms else self.sampler.p_sample_ddim - self.mask = None - self.nmask = None - self.init_latent = None - self.sampler_noises = None - self.step = 0 - self.stop_at = None - self.eta = None - self.default_eta = 0.0 - self.config = None - self.last_latent = None - - self.conditioning_key = sd_model.model.conditioning_key - - def number_of_needed_noises(self, p): - return 0 - - def launch_sampling(self, steps, func): - state.sampling_steps = steps - state.sampling_step = 0 - - try: - return func() - except InterruptedException: - return self.last_latent - - def p_sample_ddim_hook(self, x_dec, cond, ts, unconditional_conditioning, *args, **kwargs): - if state.interrupted or state.skipped: - raise InterruptedException - - if self.stop_at is not None and self.step > self.stop_at: - raise InterruptedException - - # Have to unwrap the inpainting conditioning here to perform pre-processing - image_conditioning = None - if isinstance(cond, dict): - image_conditioning = cond["c_concat"][0] - cond = cond["c_crossattn"][0] - unconditional_conditioning = unconditional_conditioning["c_crossattn"][0] - - conds_list, tensor = prompt_parser.reconstruct_multicond_batch(cond, self.step) - unconditional_conditioning = prompt_parser.reconstruct_cond_batch(unconditional_conditioning, self.step) - - assert all([len(conds) == 1 for conds in conds_list]), 'composition via AND is not supported for DDIM/PLMS samplers' - cond = tensor - - # for DDIM, shapes must match, we can't just process cond and uncond independently; - # filling unconditional_conditioning with repeats of the last vector to match length is - # not 100% correct but should work well enough - if unconditional_conditioning.shape[1] < cond.shape[1]: - last_vector = unconditional_conditioning[:, -1:] - last_vector_repeated = last_vector.repeat([1, cond.shape[1] - unconditional_conditioning.shape[1], 1]) - unconditional_conditioning = torch.hstack([unconditional_conditioning, last_vector_repeated]) - elif unconditional_conditioning.shape[1] > cond.shape[1]: - unconditional_conditioning = unconditional_conditioning[:, :cond.shape[1]] - - if self.mask is not None: - img_orig = self.sampler.model.q_sample(self.init_latent, ts) - x_dec = img_orig * self.mask + self.nmask * x_dec - - # Wrap the image conditioning back up since the DDIM code can accept the dict directly. - # Note that they need to be lists because it just concatenates them later. - if image_conditioning is not None: - cond = {"c_concat": [image_conditioning], "c_crossattn": [cond]} - unconditional_conditioning = {"c_concat": [image_conditioning], "c_crossattn": [unconditional_conditioning]} - - res = self.orig_p_sample_ddim(x_dec, cond, ts, unconditional_conditioning=unconditional_conditioning, *args, **kwargs) - - if self.mask is not None: - self.last_latent = self.init_latent * self.mask + self.nmask * res[1] - else: - self.last_latent = res[1] - - store_latent(self.last_latent) - - self.step += 1 - state.sampling_step = self.step - shared.total_tqdm.update() - - return res - - def initialize(self, p): - self.eta = p.eta if p.eta is not None else opts.eta_ddim - - for fieldname in ['p_sample_ddim', 'p_sample_plms']: - if hasattr(self.sampler, fieldname): - setattr(self.sampler, fieldname, self.p_sample_ddim_hook) - - self.mask = p.mask if hasattr(p, 'mask') else None - self.nmask = p.nmask if hasattr(p, 'nmask') else None - - def adjust_steps_if_invalid(self, p, num_steps): - if (self.config.name == 'DDIM' and p.ddim_discretize == 'uniform') or (self.config.name == 'PLMS'): - valid_step = 999 / (1000 // num_steps) - if valid_step == floor(valid_step): - return int(valid_step) + 1 - - return num_steps - - def sample_img2img(self, p, x, noise, conditioning, unconditional_conditioning, steps=None, image_conditioning=None): - steps, t_enc = setup_img2img_steps(p, steps) - steps = self.adjust_steps_if_invalid(p, steps) - self.initialize(p) - - self.sampler.make_schedule(ddim_num_steps=steps, ddim_eta=self.eta, ddim_discretize=p.ddim_discretize, verbose=False) - x1 = self.sampler.stochastic_encode(x, torch.tensor([t_enc] * int(x.shape[0])).to(shared.device), noise=noise) - - self.init_latent = x - self.last_latent = x - self.step = 0 - - # Wrap the conditioning models with additional image conditioning for inpainting model - if image_conditioning is not None: - conditioning = {"c_concat": [image_conditioning], "c_crossattn": [conditioning]} - unconditional_conditioning = {"c_concat": [image_conditioning], "c_crossattn": [unconditional_conditioning]} - - samples = self.launch_sampling(t_enc + 1, lambda: self.sampler.decode(x1, conditioning, t_enc, unconditional_guidance_scale=p.cfg_scale, unconditional_conditioning=unconditional_conditioning)) - - return samples - - def sample(self, p, x, conditioning, unconditional_conditioning, steps=None, image_conditioning=None): - self.initialize(p) - - self.init_latent = None - self.last_latent = x - self.step = 0 - - steps = self.adjust_steps_if_invalid(p, steps or p.steps) - - # Wrap the conditioning models with additional image conditioning for inpainting model - # dummy_for_plms is needed because PLMS code checks the first item in the dict to have the right shape - if image_conditioning is not None: - conditioning = {"dummy_for_plms": np.zeros((conditioning.shape[0],)), "c_crossattn": [conditioning], "c_concat": [image_conditioning]} - unconditional_conditioning = {"c_crossattn": [unconditional_conditioning], "c_concat": [image_conditioning]} - - samples_ddim = self.launch_sampling(steps, lambda: 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=self.eta)[0]) - - return samples_ddim - - -class CFGDenoiser(torch.nn.Module): - def __init__(self, model): - super().__init__() - self.inner_model = model - self.mask = None - self.nmask = None - self.init_latent = None - self.step = 0 - - def combine_denoised(self, x_out, conds_list, uncond, cond_scale): - denoised_uncond = x_out[-uncond.shape[0]:] - denoised = torch.clone(denoised_uncond) - - for i, conds in enumerate(conds_list): - for cond_index, weight in conds: - denoised[i] += (x_out[cond_index] - denoised_uncond[i]) * (weight * cond_scale) - - return denoised - - def forward(self, x, sigma, uncond, cond, cond_scale, image_cond): - if state.interrupted or state.skipped: - raise InterruptedException - - conds_list, tensor = prompt_parser.reconstruct_multicond_batch(cond, self.step) - uncond = prompt_parser.reconstruct_cond_batch(uncond, self.step) - - batch_size = len(conds_list) - repeats = [len(conds_list[i]) for i in range(batch_size)] - - x_in = torch.cat([torch.stack([x[i] for _ in range(n)]) for i, n in enumerate(repeats)] + [x]) - image_cond_in = torch.cat([torch.stack([image_cond[i] for _ in range(n)]) for i, n in enumerate(repeats)] + [image_cond]) - sigma_in = torch.cat([torch.stack([sigma[i] for _ in range(n)]) for i, n in enumerate(repeats)] + [sigma]) - - denoiser_params = CFGDenoiserParams(x_in, image_cond_in, sigma_in, state.sampling_step, state.sampling_steps) - cfg_denoiser_callback(denoiser_params) - x_in = denoiser_params.x - image_cond_in = denoiser_params.image_cond - sigma_in = denoiser_params.sigma - - if tensor.shape[1] == uncond.shape[1]: - cond_in = torch.cat([tensor, uncond]) - - if shared.batch_cond_uncond: - x_out = self.inner_model(x_in, sigma_in, cond={"c_crossattn": [cond_in], "c_concat": [image_cond_in]}) - else: - x_out = torch.zeros_like(x_in) - for batch_offset in range(0, x_out.shape[0], batch_size): - a = batch_offset - b = a + batch_size - x_out[a:b] = self.inner_model(x_in[a:b], sigma_in[a:b], cond={"c_crossattn": [cond_in[a:b]], "c_concat": [image_cond_in[a:b]]}) - else: - x_out = torch.zeros_like(x_in) - batch_size = batch_size*2 if shared.batch_cond_uncond else batch_size - for batch_offset in range(0, tensor.shape[0], batch_size): - a = batch_offset - b = min(a + batch_size, tensor.shape[0]) - x_out[a:b] = self.inner_model(x_in[a:b], sigma_in[a:b], cond={"c_crossattn": [tensor[a:b]], "c_concat": [image_cond_in[a:b]]}) - - x_out[-uncond.shape[0]:] = self.inner_model(x_in[-uncond.shape[0]:], sigma_in[-uncond.shape[0]:], cond={"c_crossattn": [uncond], "c_concat": [image_cond_in[-uncond.shape[0]:]]}) - - devices.test_for_nans(x_out, "unet") - - if opts.live_preview_content == "Prompt": - store_latent(x_out[0:uncond.shape[0]]) - elif opts.live_preview_content == "Negative prompt": - store_latent(x_out[-uncond.shape[0]:]) - - denoised = self.combine_denoised(x_out, conds_list, uncond, cond_scale) - - if self.mask is not None: - denoised = self.init_latent * self.mask + self.nmask * denoised - - self.step += 1 - - return denoised - - -class TorchHijack: - def __init__(self, sampler_noises): - # Using a deque to efficiently receive the sampler_noises in the same order as the previous index-based - # implementation. - self.sampler_noises = deque(sampler_noises) - - def __getattr__(self, item): - if item == 'randn_like': - return self.randn_like - - if hasattr(torch, item): - return getattr(torch, item) - - raise AttributeError("'{}' object has no attribute '{}'".format(type(self).__name__, item)) - - def randn_like(self, x): - if self.sampler_noises: - noise = self.sampler_noises.popleft() - if noise.shape == x.shape: - return noise - - if x.device.type == 'mps': - return torch.randn_like(x, device=devices.cpu).to(x.device) - else: - return torch.randn_like(x) - - # MPS fix for randn in torchsde def torchsde_randn(size, dtype, device, seed): if device.type == 'mps': @@ -407,146 +75,3 @@ def torchsde_randn(size, dtype, device, seed): torchsde._brownian.brownian_interval._randn = torchsde_randn - -class KDiffusionSampler: - def __init__(self, funcname, sd_model): - denoiser = k_diffusion.external.CompVisVDenoiser if sd_model.parameterization == "v" else k_diffusion.external.CompVisDenoiser - - self.model_wrap = denoiser(sd_model, quantize=shared.opts.enable_quantization) - self.funcname = funcname - self.func = getattr(k_diffusion.sampling, self.funcname) - self.extra_params = sampler_extra_params.get(funcname, []) - self.model_wrap_cfg = CFGDenoiser(self.model_wrap) - self.sampler_noises = None - self.stop_at = None - self.eta = None - self.default_eta = 1.0 - self.config = None - self.last_latent = None - - self.conditioning_key = sd_model.model.conditioning_key - - def callback_state(self, d): - step = d['i'] - latent = d["denoised"] - if opts.live_preview_content == "Combined": - store_latent(latent) - self.last_latent = latent - - if self.stop_at is not None and step > self.stop_at: - raise InterruptedException - - state.sampling_step = step - shared.total_tqdm.update() - - def launch_sampling(self, steps, func): - state.sampling_steps = steps - state.sampling_step = 0 - - try: - return func() - except InterruptedException: - return self.last_latent - - def number_of_needed_noises(self, p): - return p.steps - - def initialize(self, p): - self.model_wrap_cfg.mask = p.mask if hasattr(p, 'mask') else None - self.model_wrap_cfg.nmask = p.nmask if hasattr(p, 'nmask') else None - self.model_wrap_cfg.step = 0 - self.eta = p.eta or opts.eta_ancestral - - k_diffusion.sampling.torch = TorchHijack(self.sampler_noises if self.sampler_noises is not None else []) - - extra_params_kwargs = {} - for param_name in self.extra_params: - if hasattr(p, param_name) and param_name in inspect.signature(self.func).parameters: - extra_params_kwargs[param_name] = getattr(p, param_name) - - if 'eta' in inspect.signature(self.func).parameters: - extra_params_kwargs['eta'] = self.eta - - return extra_params_kwargs - - def get_sigmas(self, p, steps): - discard_next_to_last_sigma = self.config is not None and self.config.options.get('discard_next_to_last_sigma', False) - if opts.always_discard_next_to_last_sigma and not discard_next_to_last_sigma: - discard_next_to_last_sigma = True - p.extra_generation_params["Discard penultimate sigma"] = True - - steps += 1 if discard_next_to_last_sigma else 0 - - if p.sampler_noise_scheduler_override: - sigmas = p.sampler_noise_scheduler_override(steps) - elif self.config is not None and self.config.options.get('scheduler', None) == 'karras': - sigma_min, sigma_max = (0.1, 10) if opts.use_old_karras_scheduler_sigmas else (self.model_wrap.sigmas[0].item(), self.model_wrap.sigmas[-1].item()) - - sigmas = k_diffusion.sampling.get_sigmas_karras(n=steps, sigma_min=sigma_min, sigma_max=sigma_max, device=shared.device) - else: - sigmas = self.model_wrap.get_sigmas(steps) - - if discard_next_to_last_sigma: - sigmas = torch.cat([sigmas[:-2], sigmas[-1:]]) - - return sigmas - - def sample_img2img(self, p, x, noise, conditioning, unconditional_conditioning, steps=None, image_conditioning=None): - steps, t_enc = setup_img2img_steps(p, steps) - - sigmas = self.get_sigmas(p, steps) - - sigma_sched = sigmas[steps - t_enc - 1:] - xi = x + noise * sigma_sched[0] - - extra_params_kwargs = self.initialize(p) - if 'sigma_min' in inspect.signature(self.func).parameters: - ## last sigma is zero which isn't allowed by DPM Fast & Adaptive so taking value before last - extra_params_kwargs['sigma_min'] = sigma_sched[-2] - if 'sigma_max' in inspect.signature(self.func).parameters: - extra_params_kwargs['sigma_max'] = sigma_sched[0] - if 'n' in inspect.signature(self.func).parameters: - extra_params_kwargs['n'] = len(sigma_sched) - 1 - if 'sigma_sched' in inspect.signature(self.func).parameters: - extra_params_kwargs['sigma_sched'] = sigma_sched - if 'sigmas' in inspect.signature(self.func).parameters: - extra_params_kwargs['sigmas'] = sigma_sched - - self.model_wrap_cfg.init_latent = x - self.last_latent = x - - samples = self.launch_sampling(t_enc + 1, lambda: self.func(self.model_wrap_cfg, xi, extra_args={ - 'cond': conditioning, - 'image_cond': image_conditioning, - 'uncond': unconditional_conditioning, - 'cond_scale': p.cfg_scale - }, disable=False, callback=self.callback_state, **extra_params_kwargs)) - - return samples - - def sample(self, p, x, conditioning, unconditional_conditioning, steps=None, image_conditioning = None): - steps = steps or p.steps - - sigmas = self.get_sigmas(p, steps) - - x = x * sigmas[0] - - extra_params_kwargs = self.initialize(p) - if 'sigma_min' in inspect.signature(self.func).parameters: - extra_params_kwargs['sigma_min'] = self.model_wrap.sigmas[0].item() - extra_params_kwargs['sigma_max'] = self.model_wrap.sigmas[-1].item() - if 'n' in inspect.signature(self.func).parameters: - extra_params_kwargs['n'] = steps - else: - extra_params_kwargs['sigmas'] = sigmas - - self.last_latent = x - samples = self.launch_sampling(steps, lambda: self.func(self.model_wrap_cfg, x, extra_args={ - 'cond': conditioning, - 'image_cond': image_conditioning, - 'uncond': unconditional_conditioning, - 'cond_scale': p.cfg_scale - }, disable=False, callback=self.callback_state, **extra_params_kwargs)) - - return samples - diff --git a/modules/sd_samplers_compvis.py b/modules/sd_samplers_compvis.py index a7910b56..3d35ff72 100644 --- a/modules/sd_samplers_compvis.py +++ b/modules/sd_samplers_compvis.py @@ -1,150 +1,10 @@ -from collections import namedtuple, deque +import math + import numpy as np -from math import floor import torch -import tqdm -from PIL import Image -import inspect -import k_diffusion.sampling -import torchsde._brownian.brownian_interval -import ldm.models.diffusion.ddim -import ldm.models.diffusion.plms -from modules import prompt_parser, devices, processing, images, sd_vae_approx -from modules.shared import opts, cmd_opts, state -import modules.shared as shared -from modules.script_callbacks import CFGDenoiserParams, cfg_denoiser_callback - - -SamplerData = namedtuple('SamplerData', ['name', 'constructor', 'aliases', 'options']) - -samplers_k_diffusion = [ - ('Euler a', 'sample_euler_ancestral', ['k_euler_a', 'k_euler_ancestral'], {}), - ('Euler', 'sample_euler', ['k_euler'], {}), - ('LMS', 'sample_lms', ['k_lms'], {}), - ('Heun', 'sample_heun', ['k_heun'], {}), - ('DPM2', 'sample_dpm_2', ['k_dpm_2'], {'discard_next_to_last_sigma': True}), - ('DPM2 a', 'sample_dpm_2_ancestral', ['k_dpm_2_a'], {'discard_next_to_last_sigma': True}), - ('DPM++ 2S a', 'sample_dpmpp_2s_ancestral', ['k_dpmpp_2s_a'], {}), - ('DPM++ 2M', 'sample_dpmpp_2m', ['k_dpmpp_2m'], {}), - ('DPM++ SDE', 'sample_dpmpp_sde', ['k_dpmpp_sde'], {}), - ('DPM fast', 'sample_dpm_fast', ['k_dpm_fast'], {}), - ('DPM adaptive', 'sample_dpm_adaptive', ['k_dpm_ad'], {}), - ('LMS Karras', 'sample_lms', ['k_lms_ka'], {'scheduler': 'karras'}), - ('DPM2 Karras', 'sample_dpm_2', ['k_dpm_2_ka'], {'scheduler': 'karras', 'discard_next_to_last_sigma': True}), - ('DPM2 a Karras', 'sample_dpm_2_ancestral', ['k_dpm_2_a_ka'], {'scheduler': 'karras', 'discard_next_to_last_sigma': True}), - ('DPM++ 2S a Karras', 'sample_dpmpp_2s_ancestral', ['k_dpmpp_2s_a_ka'], {'scheduler': 'karras'}), - ('DPM++ 2M Karras', 'sample_dpmpp_2m', ['k_dpmpp_2m_ka'], {'scheduler': 'karras'}), - ('DPM++ SDE Karras', 'sample_dpmpp_sde', ['k_dpmpp_sde_ka'], {'scheduler': 'karras'}), -] - -samplers_data_k_diffusion = [ - SamplerData(label, lambda model, funcname=funcname: KDiffusionSampler(funcname, model), aliases, options) - for label, funcname, aliases, options in samplers_k_diffusion - if hasattr(k_diffusion.sampling, funcname) -] - -all_samplers = [ - *samplers_data_k_diffusion, - SamplerData('DDIM', lambda model: VanillaStableDiffusionSampler(ldm.models.diffusion.ddim.DDIMSampler, model), [], {}), - SamplerData('PLMS', lambda model: VanillaStableDiffusionSampler(ldm.models.diffusion.plms.PLMSSampler, model), [], {}), -] -all_samplers_map = {x.name: x for x in all_samplers} - -samplers = [] -samplers_for_img2img = [] -samplers_map = {} - - -def create_sampler(name, model): - if name is not None: - config = all_samplers_map.get(name, None) - else: - config = all_samplers[0] - - assert config is not None, f'bad sampler name: {name}' - - sampler = config.constructor(model) - sampler.config = config - - return sampler - - -def set_samplers(): - global samplers, samplers_for_img2img - - hidden = set(opts.hide_samplers) - hidden_img2img = set(opts.hide_samplers + ['PLMS']) - - samplers = [x for x in all_samplers if x.name not in hidden] - samplers_for_img2img = [x for x in all_samplers if x.name not in hidden_img2img] - - samplers_map.clear() - for sampler in all_samplers: - samplers_map[sampler.name.lower()] = sampler.name - for alias in sampler.aliases: - samplers_map[alias.lower()] = sampler.name - - -set_samplers() - -sampler_extra_params = { - 'sample_euler': ['s_churn', 's_tmin', 's_tmax', 's_noise'], - 'sample_heun': ['s_churn', 's_tmin', 's_tmax', 's_noise'], - 'sample_dpm_2': ['s_churn', 's_tmin', 's_tmax', 's_noise'], -} - - -def setup_img2img_steps(p, steps=None): - if opts.img2img_fix_steps or steps is not None: - requested_steps = (steps or p.steps) - steps = int(requested_steps / min(p.denoising_strength, 0.999)) if p.denoising_strength > 0 else 0 - t_enc = requested_steps - 1 - else: - steps = p.steps - t_enc = int(min(p.denoising_strength, 0.999) * steps) - - return steps, t_enc - - -approximation_indexes = {"Full": 0, "Approx NN": 1, "Approx cheap": 2} - - -def single_sample_to_image(sample, approximation=None): - if approximation is None: - approximation = approximation_indexes.get(opts.show_progress_type, 0) - - if approximation == 2: - x_sample = sd_vae_approx.cheap_approximation(sample) - elif approximation == 1: - x_sample = sd_vae_approx.model()(sample.to(devices.device, devices.dtype).unsqueeze(0))[0].detach() - else: - x_sample = processing.decode_first_stage(shared.sd_model, sample.unsqueeze(0))[0] - - x_sample = torch.clamp((x_sample + 1.0) / 2.0, min=0.0, max=1.0) - x_sample = 255. * np.moveaxis(x_sample.cpu().numpy(), 0, 2) - x_sample = x_sample.astype(np.uint8) - return Image.fromarray(x_sample) - - -def sample_to_image(samples, index=0, approximation=None): - return single_sample_to_image(samples[index], approximation) - - -def samples_to_image_grid(samples, approximation=None): - return images.image_grid([single_sample_to_image(sample, approximation) for sample in samples]) - - -def store_latent(decoded): - state.current_latent = decoded - - 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: - if not shared.parallel_processing_allowed: - shared.state.assign_current_image(sample_to_image(decoded)) - - -class InterruptedException(BaseException): - pass +from modules.shared import state +from modules import sd_samplers_common, prompt_parser, shared class VanillaStableDiffusionSampler: @@ -174,15 +34,15 @@ class VanillaStableDiffusionSampler: try: return func() - except InterruptedException: + except sd_samplers_common.InterruptedException: return self.last_latent def p_sample_ddim_hook(self, x_dec, cond, ts, unconditional_conditioning, *args, **kwargs): if state.interrupted or state.skipped: - raise InterruptedException + raise sd_samplers_common.InterruptedException if self.stop_at is not None and self.step > self.stop_at: - raise InterruptedException + raise sd_samplers_common.InterruptedException # Have to unwrap the inpainting conditioning here to perform pre-processing image_conditioning = None @@ -224,7 +84,7 @@ class VanillaStableDiffusionSampler: else: self.last_latent = res[1] - store_latent(self.last_latent) + sd_samplers_common.store_latent(self.last_latent) self.step += 1 state.sampling_step = self.step @@ -233,7 +93,7 @@ class VanillaStableDiffusionSampler: return res def initialize(self, p): - self.eta = p.eta if p.eta is not None else opts.eta_ddim + self.eta = p.eta if p.eta is not None else shared.opts.eta_ddim for fieldname in ['p_sample_ddim', 'p_sample_plms']: if hasattr(self.sampler, fieldname): @@ -245,13 +105,13 @@ class VanillaStableDiffusionSampler: def adjust_steps_if_invalid(self, p, num_steps): if (self.config.name == 'DDIM' and p.ddim_discretize == 'uniform') or (self.config.name == 'PLMS'): valid_step = 999 / (1000 // num_steps) - if valid_step == floor(valid_step): + if valid_step == math.floor(valid_step): return int(valid_step) + 1 return num_steps def sample_img2img(self, p, x, noise, conditioning, unconditional_conditioning, steps=None, image_conditioning=None): - steps, t_enc = setup_img2img_steps(p, steps) + steps, t_enc = sd_samplers_common.setup_img2img_steps(p, steps) steps = self.adjust_steps_if_invalid(p, steps) self.initialize(p) @@ -289,264 +149,3 @@ class VanillaStableDiffusionSampler: samples_ddim = self.launch_sampling(steps, lambda: 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=self.eta)[0]) return samples_ddim - - -class CFGDenoiser(torch.nn.Module): - def __init__(self, model): - super().__init__() - self.inner_model = model - self.mask = None - self.nmask = None - self.init_latent = None - self.step = 0 - - def combine_denoised(self, x_out, conds_list, uncond, cond_scale): - denoised_uncond = x_out[-uncond.shape[0]:] - denoised = torch.clone(denoised_uncond) - - for i, conds in enumerate(conds_list): - for cond_index, weight in conds: - denoised[i] += (x_out[cond_index] - denoised_uncond[i]) * (weight * cond_scale) - - return denoised - - def forward(self, x, sigma, uncond, cond, cond_scale, image_cond): - if state.interrupted or state.skipped: - raise InterruptedException - - conds_list, tensor = prompt_parser.reconstruct_multicond_batch(cond, self.step) - uncond = prompt_parser.reconstruct_cond_batch(uncond, self.step) - - batch_size = len(conds_list) - repeats = [len(conds_list[i]) for i in range(batch_size)] - - x_in = torch.cat([torch.stack([x[i] for _ in range(n)]) for i, n in enumerate(repeats)] + [x]) - image_cond_in = torch.cat([torch.stack([image_cond[i] for _ in range(n)]) for i, n in enumerate(repeats)] + [image_cond]) - sigma_in = torch.cat([torch.stack([sigma[i] for _ in range(n)]) for i, n in enumerate(repeats)] + [sigma]) - - denoiser_params = CFGDenoiserParams(x_in, image_cond_in, sigma_in, state.sampling_step, state.sampling_steps) - cfg_denoiser_callback(denoiser_params) - x_in = denoiser_params.x - image_cond_in = denoiser_params.image_cond - sigma_in = denoiser_params.sigma - - if tensor.shape[1] == uncond.shape[1]: - cond_in = torch.cat([tensor, uncond]) - - if shared.batch_cond_uncond: - x_out = self.inner_model(x_in, sigma_in, cond={"c_crossattn": [cond_in], "c_concat": [image_cond_in]}) - else: - x_out = torch.zeros_like(x_in) - for batch_offset in range(0, x_out.shape[0], batch_size): - a = batch_offset - b = a + batch_size - x_out[a:b] = self.inner_model(x_in[a:b], sigma_in[a:b], cond={"c_crossattn": [cond_in[a:b]], "c_concat": [image_cond_in[a:b]]}) - else: - x_out = torch.zeros_like(x_in) - batch_size = batch_size*2 if shared.batch_cond_uncond else batch_size - for batch_offset in range(0, tensor.shape[0], batch_size): - a = batch_offset - b = min(a + batch_size, tensor.shape[0]) - x_out[a:b] = self.inner_model(x_in[a:b], sigma_in[a:b], cond={"c_crossattn": [tensor[a:b]], "c_concat": [image_cond_in[a:b]]}) - - x_out[-uncond.shape[0]:] = self.inner_model(x_in[-uncond.shape[0]:], sigma_in[-uncond.shape[0]:], cond={"c_crossattn": [uncond], "c_concat": [image_cond_in[-uncond.shape[0]:]]}) - - devices.test_for_nans(x_out, "unet") - - if opts.live_preview_content == "Prompt": - store_latent(x_out[0:uncond.shape[0]]) - elif opts.live_preview_content == "Negative prompt": - store_latent(x_out[-uncond.shape[0]:]) - - denoised = self.combine_denoised(x_out, conds_list, uncond, cond_scale) - - if self.mask is not None: - denoised = self.init_latent * self.mask + self.nmask * denoised - - self.step += 1 - - return denoised - - -class TorchHijack: - def __init__(self, sampler_noises): - # Using a deque to efficiently receive the sampler_noises in the same order as the previous index-based - # implementation. - self.sampler_noises = deque(sampler_noises) - - def __getattr__(self, item): - if item == 'randn_like': - return self.randn_like - - if hasattr(torch, item): - return getattr(torch, item) - - raise AttributeError("'{}' object has no attribute '{}'".format(type(self).__name__, item)) - - def randn_like(self, x): - if self.sampler_noises: - noise = self.sampler_noises.popleft() - if noise.shape == x.shape: - return noise - - if x.device.type == 'mps': - return torch.randn_like(x, device=devices.cpu).to(x.device) - else: - return torch.randn_like(x) - - -# MPS fix for randn in torchsde -def torchsde_randn(size, dtype, device, seed): - if device.type == 'mps': - generator = torch.Generator(devices.cpu).manual_seed(int(seed)) - return torch.randn(size, dtype=dtype, device=devices.cpu, generator=generator).to(device) - else: - generator = torch.Generator(device).manual_seed(int(seed)) - return torch.randn(size, dtype=dtype, device=device, generator=generator) - - -torchsde._brownian.brownian_interval._randn = torchsde_randn - - -class KDiffusionSampler: - def __init__(self, funcname, sd_model): - denoiser = k_diffusion.external.CompVisVDenoiser if sd_model.parameterization == "v" else k_diffusion.external.CompVisDenoiser - - self.model_wrap = denoiser(sd_model, quantize=shared.opts.enable_quantization) - self.funcname = funcname - self.func = getattr(k_diffusion.sampling, self.funcname) - self.extra_params = sampler_extra_params.get(funcname, []) - self.model_wrap_cfg = CFGDenoiser(self.model_wrap) - self.sampler_noises = None - self.stop_at = None - self.eta = None - self.default_eta = 1.0 - self.config = None - self.last_latent = None - - self.conditioning_key = sd_model.model.conditioning_key - - def callback_state(self, d): - step = d['i'] - latent = d["denoised"] - if opts.live_preview_content == "Combined": - store_latent(latent) - self.last_latent = latent - - if self.stop_at is not None and step > self.stop_at: - raise InterruptedException - - state.sampling_step = step - shared.total_tqdm.update() - - def launch_sampling(self, steps, func): - state.sampling_steps = steps - state.sampling_step = 0 - - try: - return func() - except InterruptedException: - return self.last_latent - - def number_of_needed_noises(self, p): - return p.steps - - def initialize(self, p): - self.model_wrap_cfg.mask = p.mask if hasattr(p, 'mask') else None - self.model_wrap_cfg.nmask = p.nmask if hasattr(p, 'nmask') else None - self.model_wrap_cfg.step = 0 - self.eta = p.eta or opts.eta_ancestral - - k_diffusion.sampling.torch = TorchHijack(self.sampler_noises if self.sampler_noises is not None else []) - - extra_params_kwargs = {} - for param_name in self.extra_params: - if hasattr(p, param_name) and param_name in inspect.signature(self.func).parameters: - extra_params_kwargs[param_name] = getattr(p, param_name) - - if 'eta' in inspect.signature(self.func).parameters: - extra_params_kwargs['eta'] = self.eta - - return extra_params_kwargs - - def get_sigmas(self, p, steps): - discard_next_to_last_sigma = self.config is not None and self.config.options.get('discard_next_to_last_sigma', False) - if opts.always_discard_next_to_last_sigma and not discard_next_to_last_sigma: - discard_next_to_last_sigma = True - p.extra_generation_params["Discard penultimate sigma"] = True - - steps += 1 if discard_next_to_last_sigma else 0 - - if p.sampler_noise_scheduler_override: - sigmas = p.sampler_noise_scheduler_override(steps) - elif self.config is not None and self.config.options.get('scheduler', None) == 'karras': - sigma_min, sigma_max = (0.1, 10) if opts.use_old_karras_scheduler_sigmas else (self.model_wrap.sigmas[0].item(), self.model_wrap.sigmas[-1].item()) - - sigmas = k_diffusion.sampling.get_sigmas_karras(n=steps, sigma_min=sigma_min, sigma_max=sigma_max, device=shared.device) - else: - sigmas = self.model_wrap.get_sigmas(steps) - - if discard_next_to_last_sigma: - sigmas = torch.cat([sigmas[:-2], sigmas[-1:]]) - - return sigmas - - def sample_img2img(self, p, x, noise, conditioning, unconditional_conditioning, steps=None, image_conditioning=None): - steps, t_enc = setup_img2img_steps(p, steps) - - sigmas = self.get_sigmas(p, steps) - - sigma_sched = sigmas[steps - t_enc - 1:] - xi = x + noise * sigma_sched[0] - - extra_params_kwargs = self.initialize(p) - if 'sigma_min' in inspect.signature(self.func).parameters: - ## last sigma is zero which isn't allowed by DPM Fast & Adaptive so taking value before last - extra_params_kwargs['sigma_min'] = sigma_sched[-2] - if 'sigma_max' in inspect.signature(self.func).parameters: - extra_params_kwargs['sigma_max'] = sigma_sched[0] - if 'n' in inspect.signature(self.func).parameters: - extra_params_kwargs['n'] = len(sigma_sched) - 1 - if 'sigma_sched' in inspect.signature(self.func).parameters: - extra_params_kwargs['sigma_sched'] = sigma_sched - if 'sigmas' in inspect.signature(self.func).parameters: - extra_params_kwargs['sigmas'] = sigma_sched - - self.model_wrap_cfg.init_latent = x - self.last_latent = x - - samples = self.launch_sampling(t_enc + 1, lambda: self.func(self.model_wrap_cfg, xi, extra_args={ - 'cond': conditioning, - 'image_cond': image_conditioning, - 'uncond': unconditional_conditioning, - 'cond_scale': p.cfg_scale - }, disable=False, callback=self.callback_state, **extra_params_kwargs)) - - return samples - - def sample(self, p, x, conditioning, unconditional_conditioning, steps=None, image_conditioning = None): - steps = steps or p.steps - - sigmas = self.get_sigmas(p, steps) - - x = x * sigmas[0] - - extra_params_kwargs = self.initialize(p) - if 'sigma_min' in inspect.signature(self.func).parameters: - extra_params_kwargs['sigma_min'] = self.model_wrap.sigmas[0].item() - extra_params_kwargs['sigma_max'] = self.model_wrap.sigmas[-1].item() - if 'n' in inspect.signature(self.func).parameters: - extra_params_kwargs['n'] = steps - else: - extra_params_kwargs['sigmas'] = sigmas - - self.last_latent = x - samples = self.launch_sampling(steps, lambda: self.func(self.model_wrap_cfg, x, extra_args={ - 'cond': conditioning, - 'image_cond': image_conditioning, - 'uncond': unconditional_conditioning, - 'cond_scale': p.cfg_scale - }, disable=False, callback=self.callback_state, **extra_params_kwargs)) - - return samples -