From aa54a9d41680051b4b28b0655f8d61a2f23600b1 Mon Sep 17 00:00:00 2001 From: AUTOMATIC <16777216c@gmail.com> Date: Mon, 30 Jan 2023 09:51:06 +0300 Subject: split compvis sampler and shared sampler stuff into their own files --- modules/sd_samplers.py | 243 +++---------------------------------------------- 1 file changed, 15 insertions(+), 228 deletions(-) (limited to 'modules/sd_samplers.py') 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) -- cgit v1.2.3