mirror of
https://github.com/comfyanonymous/ComfyUI.git
synced 2025-01-11 10:25:16 +00:00
dcec1047e6
This doesn't affect how percentages behave in the frontend but breaks things if you relied on them in the backend. percent_to_sigma goes from 0 to 1.0 instead of 1.0 to 0 for less confusion. Make percent 0 return an extremely large sigma and percent 1.0 return a zero one to fix imprecision.
712 lines
28 KiB
Python
712 lines
28 KiB
Python
from .k_diffusion import sampling as k_diffusion_sampling
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from .extra_samplers import uni_pc
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import torch
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import enum
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from comfy import model_management
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import math
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from comfy import model_base
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import comfy.utils
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import comfy.conds
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#The main sampling function shared by all the samplers
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#Returns denoised
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def sampling_function(model, x, timestep, uncond, cond, cond_scale, model_options={}, seed=None):
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def get_area_and_mult(conds, x_in, timestep_in):
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area = (x_in.shape[2], x_in.shape[3], 0, 0)
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strength = 1.0
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if 'timestep_start' in conds:
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timestep_start = conds['timestep_start']
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if timestep_in[0] > timestep_start:
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return None
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if 'timestep_end' in conds:
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timestep_end = conds['timestep_end']
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if timestep_in[0] < timestep_end:
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return None
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if 'area' in conds:
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area = conds['area']
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if 'strength' in conds:
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strength = conds['strength']
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input_x = x_in[:,:,area[2]:area[0] + area[2],area[3]:area[1] + area[3]]
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if 'mask' in conds:
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# Scale the mask to the size of the input
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# The mask should have been resized as we began the sampling process
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mask_strength = 1.0
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if "mask_strength" in conds:
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mask_strength = conds["mask_strength"]
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mask = conds['mask']
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assert(mask.shape[1] == x_in.shape[2])
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assert(mask.shape[2] == x_in.shape[3])
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mask = mask[:,area[2]:area[0] + area[2],area[3]:area[1] + area[3]] * mask_strength
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mask = mask.unsqueeze(1).repeat(input_x.shape[0] // mask.shape[0], input_x.shape[1], 1, 1)
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else:
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mask = torch.ones_like(input_x)
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mult = mask * strength
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if 'mask' not in conds:
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rr = 8
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if area[2] != 0:
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for t in range(rr):
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mult[:,:,t:1+t,:] *= ((1.0/rr) * (t + 1))
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if (area[0] + area[2]) < x_in.shape[2]:
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for t in range(rr):
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mult[:,:,area[0] - 1 - t:area[0] - t,:] *= ((1.0/rr) * (t + 1))
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if area[3] != 0:
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for t in range(rr):
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mult[:,:,:,t:1+t] *= ((1.0/rr) * (t + 1))
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if (area[1] + area[3]) < x_in.shape[3]:
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for t in range(rr):
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mult[:,:,:,area[1] - 1 - t:area[1] - t] *= ((1.0/rr) * (t + 1))
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conditionning = {}
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model_conds = conds["model_conds"]
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for c in model_conds:
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conditionning[c] = model_conds[c].process_cond(batch_size=x_in.shape[0], device=x_in.device, area=area)
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control = None
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if 'control' in conds:
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control = conds['control']
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patches = None
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if 'gligen' in conds:
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gligen = conds['gligen']
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patches = {}
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gligen_type = gligen[0]
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gligen_model = gligen[1]
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if gligen_type == "position":
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gligen_patch = gligen_model.model.set_position(input_x.shape, gligen[2], input_x.device)
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else:
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gligen_patch = gligen_model.model.set_empty(input_x.shape, input_x.device)
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patches['middle_patch'] = [gligen_patch]
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return (input_x, mult, conditionning, area, control, patches)
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def cond_equal_size(c1, c2):
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if c1 is c2:
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return True
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if c1.keys() != c2.keys():
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return False
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for k in c1:
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if not c1[k].can_concat(c2[k]):
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return False
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return True
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def can_concat_cond(c1, c2):
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if c1[0].shape != c2[0].shape:
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return False
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#control
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if (c1[4] is None) != (c2[4] is None):
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return False
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if c1[4] is not None:
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if c1[4] is not c2[4]:
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return False
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#patches
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if (c1[5] is None) != (c2[5] is None):
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return False
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if (c1[5] is not None):
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if c1[5] is not c2[5]:
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return False
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return cond_equal_size(c1[2], c2[2])
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def cond_cat(c_list):
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c_crossattn = []
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c_concat = []
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c_adm = []
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crossattn_max_len = 0
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temp = {}
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for x in c_list:
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for k in x:
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cur = temp.get(k, [])
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cur.append(x[k])
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temp[k] = cur
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out = {}
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for k in temp:
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conds = temp[k]
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out[k] = conds[0].concat(conds[1:])
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return out
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def calc_cond_uncond_batch(model, cond, uncond, x_in, timestep, model_options):
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out_cond = torch.zeros_like(x_in)
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out_count = torch.ones_like(x_in) * 1e-37
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out_uncond = torch.zeros_like(x_in)
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out_uncond_count = torch.ones_like(x_in) * 1e-37
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COND = 0
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UNCOND = 1
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to_run = []
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for x in cond:
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p = get_area_and_mult(x, x_in, timestep)
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if p is None:
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continue
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to_run += [(p, COND)]
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if uncond is not None:
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for x in uncond:
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p = get_area_and_mult(x, x_in, timestep)
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if p is None:
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continue
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to_run += [(p, UNCOND)]
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while len(to_run) > 0:
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first = to_run[0]
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first_shape = first[0][0].shape
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to_batch_temp = []
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for x in range(len(to_run)):
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if can_concat_cond(to_run[x][0], first[0]):
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to_batch_temp += [x]
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to_batch_temp.reverse()
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to_batch = to_batch_temp[:1]
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free_memory = model_management.get_free_memory(x_in.device)
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for i in range(1, len(to_batch_temp) + 1):
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batch_amount = to_batch_temp[:len(to_batch_temp)//i]
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input_shape = [len(batch_amount) * first_shape[0]] + list(first_shape)[1:]
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if model.memory_required(input_shape) < free_memory:
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to_batch = batch_amount
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break
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input_x = []
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mult = []
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c = []
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cond_or_uncond = []
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area = []
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control = None
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patches = None
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for x in to_batch:
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o = to_run.pop(x)
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p = o[0]
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input_x += [p[0]]
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mult += [p[1]]
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c += [p[2]]
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area += [p[3]]
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cond_or_uncond += [o[1]]
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control = p[4]
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patches = p[5]
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batch_chunks = len(cond_or_uncond)
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input_x = torch.cat(input_x)
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c = cond_cat(c)
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timestep_ = torch.cat([timestep] * batch_chunks)
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if control is not None:
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c['control'] = control.get_control(input_x, timestep_, c, len(cond_or_uncond))
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transformer_options = {}
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if 'transformer_options' in model_options:
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transformer_options = model_options['transformer_options'].copy()
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if patches is not None:
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if "patches" in transformer_options:
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cur_patches = transformer_options["patches"].copy()
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for p in patches:
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if p in cur_patches:
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cur_patches[p] = cur_patches[p] + patches[p]
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else:
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cur_patches[p] = patches[p]
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else:
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transformer_options["patches"] = patches
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transformer_options["cond_or_uncond"] = cond_or_uncond[:]
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transformer_options["sigmas"] = timestep
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c['transformer_options'] = transformer_options
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if 'model_function_wrapper' in model_options:
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output = model_options['model_function_wrapper'](model.apply_model, {"input": input_x, "timestep": timestep_, "c": c, "cond_or_uncond": cond_or_uncond}).chunk(batch_chunks)
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else:
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output = model.apply_model(input_x, timestep_, **c).chunk(batch_chunks)
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del input_x
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for o in range(batch_chunks):
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if cond_or_uncond[o] == COND:
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out_cond[:,:,area[o][2]:area[o][0] + area[o][2],area[o][3]:area[o][1] + area[o][3]] += output[o] * mult[o]
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out_count[:,:,area[o][2]:area[o][0] + area[o][2],area[o][3]:area[o][1] + area[o][3]] += mult[o]
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else:
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out_uncond[:,:,area[o][2]:area[o][0] + area[o][2],area[o][3]:area[o][1] + area[o][3]] += output[o] * mult[o]
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out_uncond_count[:,:,area[o][2]:area[o][0] + area[o][2],area[o][3]:area[o][1] + area[o][3]] += mult[o]
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del mult
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out_cond /= out_count
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del out_count
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out_uncond /= out_uncond_count
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del out_uncond_count
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return out_cond, out_uncond
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if math.isclose(cond_scale, 1.0):
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uncond = None
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cond, uncond = calc_cond_uncond_batch(model, cond, uncond, x, timestep, model_options)
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if "sampler_cfg_function" in model_options:
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args = {"cond": x - cond, "uncond": x - uncond, "cond_scale": cond_scale, "timestep": timestep, "input": x, "sigma": timestep}
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return x - model_options["sampler_cfg_function"](args)
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else:
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return uncond + (cond - uncond) * cond_scale
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class CFGNoisePredictor(torch.nn.Module):
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def __init__(self, model):
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super().__init__()
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self.inner_model = model
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def apply_model(self, x, timestep, cond, uncond, cond_scale, model_options={}, seed=None):
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out = sampling_function(self.inner_model, x, timestep, uncond, cond, cond_scale, model_options=model_options, seed=seed)
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return out
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def forward(self, *args, **kwargs):
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return self.apply_model(*args, **kwargs)
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class KSamplerX0Inpaint(torch.nn.Module):
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def __init__(self, model):
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super().__init__()
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self.inner_model = model
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def forward(self, x, sigma, uncond, cond, cond_scale, denoise_mask, model_options={}, seed=None):
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if denoise_mask is not None:
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latent_mask = 1. - denoise_mask
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x = x * denoise_mask + (self.latent_image + self.noise * sigma.reshape([sigma.shape[0]] + [1] * (len(self.noise.shape) - 1))) * latent_mask
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out = self.inner_model(x, sigma, cond=cond, uncond=uncond, cond_scale=cond_scale, model_options=model_options, seed=seed)
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if denoise_mask is not None:
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out *= denoise_mask
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if denoise_mask is not None:
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out += self.latent_image * latent_mask
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return out
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def simple_scheduler(model, steps):
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s = model.model_sampling
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sigs = []
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ss = len(s.sigmas) / steps
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for x in range(steps):
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sigs += [float(s.sigmas[-(1 + int(x * ss))])]
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sigs += [0.0]
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return torch.FloatTensor(sigs)
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def ddim_scheduler(model, steps):
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s = model.model_sampling
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sigs = []
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ss = len(s.sigmas) // steps
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x = 1
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while x < len(s.sigmas):
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sigs += [float(s.sigmas[x])]
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x += ss
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sigs = sigs[::-1]
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sigs += [0.0]
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return torch.FloatTensor(sigs)
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def normal_scheduler(model, steps, sgm=False, floor=False):
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s = model.model_sampling
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start = s.timestep(s.sigma_max)
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end = s.timestep(s.sigma_min)
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if sgm:
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timesteps = torch.linspace(start, end, steps + 1)[:-1]
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else:
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timesteps = torch.linspace(start, end, steps)
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sigs = []
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for x in range(len(timesteps)):
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ts = timesteps[x]
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sigs.append(s.sigma(ts))
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sigs += [0.0]
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return torch.FloatTensor(sigs)
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def get_mask_aabb(masks):
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if masks.numel() == 0:
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return torch.zeros((0, 4), device=masks.device, dtype=torch.int)
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b = masks.shape[0]
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bounding_boxes = torch.zeros((b, 4), device=masks.device, dtype=torch.int)
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is_empty = torch.zeros((b), device=masks.device, dtype=torch.bool)
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for i in range(b):
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mask = masks[i]
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if mask.numel() == 0:
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continue
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if torch.max(mask != 0) == False:
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is_empty[i] = True
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continue
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y, x = torch.where(mask)
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bounding_boxes[i, 0] = torch.min(x)
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bounding_boxes[i, 1] = torch.min(y)
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bounding_boxes[i, 2] = torch.max(x)
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bounding_boxes[i, 3] = torch.max(y)
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return bounding_boxes, is_empty
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def resolve_areas_and_cond_masks(conditions, h, w, device):
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# We need to decide on an area outside the sampling loop in order to properly generate opposite areas of equal sizes.
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# While we're doing this, we can also resolve the mask device and scaling for performance reasons
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for i in range(len(conditions)):
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c = conditions[i]
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if 'area' in c:
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area = c['area']
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if area[0] == "percentage":
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modified = c.copy()
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area = (max(1, round(area[1] * h)), max(1, round(area[2] * w)), round(area[3] * h), round(area[4] * w))
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modified['area'] = area
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c = modified
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conditions[i] = c
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if 'mask' in c:
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mask = c['mask']
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mask = mask.to(device=device)
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modified = c.copy()
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if len(mask.shape) == 2:
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mask = mask.unsqueeze(0)
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if mask.shape[1] != h or mask.shape[2] != w:
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mask = torch.nn.functional.interpolate(mask.unsqueeze(1), size=(h, w), mode='bilinear', align_corners=False).squeeze(1)
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if modified.get("set_area_to_bounds", False):
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bounds = torch.max(torch.abs(mask),dim=0).values.unsqueeze(0)
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boxes, is_empty = get_mask_aabb(bounds)
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if is_empty[0]:
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# Use the minimum possible size for efficiency reasons. (Since the mask is all-0, this becomes a noop anyway)
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modified['area'] = (8, 8, 0, 0)
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else:
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box = boxes[0]
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H, W, Y, X = (box[3] - box[1] + 1, box[2] - box[0] + 1, box[1], box[0])
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H = max(8, H)
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W = max(8, W)
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area = (int(H), int(W), int(Y), int(X))
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modified['area'] = area
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modified['mask'] = mask
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conditions[i] = modified
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def create_cond_with_same_area_if_none(conds, c):
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if 'area' not in c:
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return
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c_area = c['area']
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smallest = None
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for x in conds:
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if 'area' in x:
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a = x['area']
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if c_area[2] >= a[2] and c_area[3] >= a[3]:
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if a[0] + a[2] >= c_area[0] + c_area[2]:
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if a[1] + a[3] >= c_area[1] + c_area[3]:
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if smallest is None:
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smallest = x
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elif 'area' not in smallest:
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smallest = x
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else:
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if smallest['area'][0] * smallest['area'][1] > a[0] * a[1]:
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smallest = x
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else:
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if smallest is None:
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smallest = x
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if smallest is None:
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return
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if 'area' in smallest:
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if smallest['area'] == c_area:
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return
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out = c.copy()
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out['model_conds'] = smallest['model_conds'].copy() #TODO: which fields should be copied?
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conds += [out]
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def calculate_start_end_timesteps(model, conds):
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s = model.model_sampling
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for t in range(len(conds)):
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x = conds[t]
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timestep_start = None
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timestep_end = None
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if 'start_percent' in x:
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timestep_start = s.percent_to_sigma(x['start_percent'])
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if 'end_percent' in x:
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timestep_end = s.percent_to_sigma(x['end_percent'])
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if (timestep_start is not None) or (timestep_end is not None):
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n = x.copy()
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if (timestep_start is not None):
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n['timestep_start'] = timestep_start
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if (timestep_end is not None):
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n['timestep_end'] = timestep_end
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conds[t] = n
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def pre_run_control(model, conds):
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s = model.model_sampling
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for t in range(len(conds)):
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x = conds[t]
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timestep_start = None
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timestep_end = None
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percent_to_timestep_function = lambda a: s.percent_to_sigma(a)
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if 'control' in x:
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x['control'].pre_run(model, percent_to_timestep_function)
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def apply_empty_x_to_equal_area(conds, uncond, name, uncond_fill_func):
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cond_cnets = []
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cond_other = []
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uncond_cnets = []
|
|
uncond_other = []
|
|
for t in range(len(conds)):
|
|
x = conds[t]
|
|
if 'area' not in x:
|
|
if name in x and x[name] is not None:
|
|
cond_cnets.append(x[name])
|
|
else:
|
|
cond_other.append((x, t))
|
|
for t in range(len(uncond)):
|
|
x = uncond[t]
|
|
if 'area' not in x:
|
|
if name in x and x[name] is not None:
|
|
uncond_cnets.append(x[name])
|
|
else:
|
|
uncond_other.append((x, t))
|
|
|
|
if len(uncond_cnets) > 0:
|
|
return
|
|
|
|
for x in range(len(cond_cnets)):
|
|
temp = uncond_other[x % len(uncond_other)]
|
|
o = temp[0]
|
|
if name in o and o[name] is not None:
|
|
n = o.copy()
|
|
n[name] = uncond_fill_func(cond_cnets, x)
|
|
uncond += [n]
|
|
else:
|
|
n = o.copy()
|
|
n[name] = uncond_fill_func(cond_cnets, x)
|
|
uncond[temp[1]] = n
|
|
|
|
def encode_model_conds(model_function, conds, noise, device, prompt_type, **kwargs):
|
|
for t in range(len(conds)):
|
|
x = conds[t]
|
|
params = x.copy()
|
|
params["device"] = device
|
|
params["noise"] = noise
|
|
params["width"] = params.get("width", noise.shape[3] * 8)
|
|
params["height"] = params.get("height", noise.shape[2] * 8)
|
|
params["prompt_type"] = params.get("prompt_type", prompt_type)
|
|
for k in kwargs:
|
|
if k not in params:
|
|
params[k] = kwargs[k]
|
|
|
|
out = model_function(**params)
|
|
x = x.copy()
|
|
model_conds = x['model_conds'].copy()
|
|
for k in out:
|
|
model_conds[k] = out[k]
|
|
x['model_conds'] = model_conds
|
|
conds[t] = x
|
|
return conds
|
|
|
|
class Sampler:
|
|
def sample(self):
|
|
pass
|
|
|
|
def max_denoise(self, model_wrap, sigmas):
|
|
max_sigma = float(model_wrap.inner_model.model_sampling.sigma_max)
|
|
sigma = float(sigmas[0])
|
|
return math.isclose(max_sigma, sigma, rel_tol=1e-05) or sigma > max_sigma
|
|
|
|
class UNIPC(Sampler):
|
|
def sample(self, model_wrap, sigmas, extra_args, callback, noise, latent_image=None, denoise_mask=None, disable_pbar=False):
|
|
return uni_pc.sample_unipc(model_wrap, noise, latent_image, sigmas, max_denoise=self.max_denoise(model_wrap, sigmas), extra_args=extra_args, noise_mask=denoise_mask, callback=callback, disable=disable_pbar)
|
|
|
|
class UNIPCBH2(Sampler):
|
|
def sample(self, model_wrap, sigmas, extra_args, callback, noise, latent_image=None, denoise_mask=None, disable_pbar=False):
|
|
return uni_pc.sample_unipc(model_wrap, noise, latent_image, sigmas, max_denoise=self.max_denoise(model_wrap, sigmas), extra_args=extra_args, noise_mask=denoise_mask, callback=callback, variant='bh2', disable=disable_pbar)
|
|
|
|
KSAMPLER_NAMES = ["euler", "euler_ancestral", "heun", "heunpp2","dpm_2", "dpm_2_ancestral",
|
|
"lms", "dpm_fast", "dpm_adaptive", "dpmpp_2s_ancestral", "dpmpp_sde", "dpmpp_sde_gpu",
|
|
"dpmpp_2m", "dpmpp_2m_sde", "dpmpp_2m_sde_gpu", "dpmpp_3m_sde", "dpmpp_3m_sde_gpu", "ddpm", "lcm"]
|
|
|
|
class KSAMPLER(Sampler):
|
|
def __init__(self, sampler_function, extra_options={}, inpaint_options={}):
|
|
self.sampler_function = sampler_function
|
|
self.extra_options = extra_options
|
|
self.inpaint_options = inpaint_options
|
|
|
|
def sample(self, model_wrap, sigmas, extra_args, callback, noise, latent_image=None, denoise_mask=None, disable_pbar=False):
|
|
extra_args["denoise_mask"] = denoise_mask
|
|
model_k = KSamplerX0Inpaint(model_wrap)
|
|
model_k.latent_image = latent_image
|
|
if self.inpaint_options.get("random", False): #TODO: Should this be the default?
|
|
generator = torch.manual_seed(extra_args.get("seed", 41) + 1)
|
|
model_k.noise = torch.randn(noise.shape, generator=generator, device="cpu").to(noise.dtype).to(noise.device)
|
|
else:
|
|
model_k.noise = noise
|
|
|
|
if self.max_denoise(model_wrap, sigmas):
|
|
noise = noise * torch.sqrt(1.0 + sigmas[0] ** 2.0)
|
|
else:
|
|
noise = noise * sigmas[0]
|
|
|
|
k_callback = None
|
|
total_steps = len(sigmas) - 1
|
|
if callback is not None:
|
|
k_callback = lambda x: callback(x["i"], x["denoised"], x["x"], total_steps)
|
|
|
|
if latent_image is not None:
|
|
noise += latent_image
|
|
|
|
samples = self.sampler_function(model_k, noise, sigmas, extra_args=extra_args, callback=k_callback, disable=disable_pbar, **self.extra_options)
|
|
return samples
|
|
|
|
|
|
def ksampler(sampler_name, extra_options={}, inpaint_options={}):
|
|
if sampler_name == "dpm_fast":
|
|
def dpm_fast_function(model, noise, sigmas, extra_args, callback, disable):
|
|
sigma_min = sigmas[-1]
|
|
if sigma_min == 0:
|
|
sigma_min = sigmas[-2]
|
|
total_steps = len(sigmas) - 1
|
|
return k_diffusion_sampling.sample_dpm_fast(model, noise, sigma_min, sigmas[0], total_steps, extra_args=extra_args, callback=callback, disable=disable)
|
|
sampler_function = dpm_fast_function
|
|
elif sampler_name == "dpm_adaptive":
|
|
def dpm_adaptive_function(model, noise, sigmas, extra_args, callback, disable):
|
|
sigma_min = sigmas[-1]
|
|
if sigma_min == 0:
|
|
sigma_min = sigmas[-2]
|
|
return k_diffusion_sampling.sample_dpm_adaptive(model, noise, sigma_min, sigmas[0], extra_args=extra_args, callback=callback, disable=disable)
|
|
sampler_function = dpm_adaptive_function
|
|
else:
|
|
sampler_function = getattr(k_diffusion_sampling, "sample_{}".format(sampler_name))
|
|
|
|
return KSAMPLER(sampler_function, extra_options, inpaint_options)
|
|
|
|
def wrap_model(model):
|
|
model_denoise = CFGNoisePredictor(model)
|
|
return model_denoise
|
|
|
|
def sample(model, noise, positive, negative, cfg, device, sampler, sigmas, model_options={}, latent_image=None, denoise_mask=None, callback=None, disable_pbar=False, seed=None):
|
|
positive = positive[:]
|
|
negative = negative[:]
|
|
|
|
resolve_areas_and_cond_masks(positive, noise.shape[2], noise.shape[3], device)
|
|
resolve_areas_and_cond_masks(negative, noise.shape[2], noise.shape[3], device)
|
|
|
|
model_wrap = wrap_model(model)
|
|
|
|
calculate_start_end_timesteps(model, negative)
|
|
calculate_start_end_timesteps(model, positive)
|
|
|
|
#make sure each cond area has an opposite one with the same area
|
|
for c in positive:
|
|
create_cond_with_same_area_if_none(negative, c)
|
|
for c in negative:
|
|
create_cond_with_same_area_if_none(positive, c)
|
|
|
|
pre_run_control(model, negative + positive)
|
|
|
|
apply_empty_x_to_equal_area(list(filter(lambda c: c.get('control_apply_to_uncond', False) == True, positive)), negative, 'control', lambda cond_cnets, x: cond_cnets[x])
|
|
apply_empty_x_to_equal_area(positive, negative, 'gligen', lambda cond_cnets, x: cond_cnets[x])
|
|
|
|
if latent_image is not None:
|
|
latent_image = model.process_latent_in(latent_image)
|
|
|
|
if hasattr(model, 'extra_conds'):
|
|
positive = encode_model_conds(model.extra_conds, positive, noise, device, "positive", latent_image=latent_image, denoise_mask=denoise_mask)
|
|
negative = encode_model_conds(model.extra_conds, negative, noise, device, "negative", latent_image=latent_image, denoise_mask=denoise_mask)
|
|
|
|
extra_args = {"cond":positive, "uncond":negative, "cond_scale": cfg, "model_options": model_options, "seed":seed}
|
|
|
|
samples = sampler.sample(model_wrap, sigmas, extra_args, callback, noise, latent_image, denoise_mask, disable_pbar)
|
|
return model.process_latent_out(samples.to(torch.float32))
|
|
|
|
SCHEDULER_NAMES = ["normal", "karras", "exponential", "sgm_uniform", "simple", "ddim_uniform"]
|
|
SAMPLER_NAMES = KSAMPLER_NAMES + ["ddim", "uni_pc", "uni_pc_bh2"]
|
|
|
|
def calculate_sigmas_scheduler(model, scheduler_name, steps):
|
|
if scheduler_name == "karras":
|
|
sigmas = k_diffusion_sampling.get_sigmas_karras(n=steps, sigma_min=float(model.model_sampling.sigma_min), sigma_max=float(model.model_sampling.sigma_max))
|
|
elif scheduler_name == "exponential":
|
|
sigmas = k_diffusion_sampling.get_sigmas_exponential(n=steps, sigma_min=float(model.model_sampling.sigma_min), sigma_max=float(model.model_sampling.sigma_max))
|
|
elif scheduler_name == "normal":
|
|
sigmas = normal_scheduler(model, steps)
|
|
elif scheduler_name == "simple":
|
|
sigmas = simple_scheduler(model, steps)
|
|
elif scheduler_name == "ddim_uniform":
|
|
sigmas = ddim_scheduler(model, steps)
|
|
elif scheduler_name == "sgm_uniform":
|
|
sigmas = normal_scheduler(model, steps, sgm=True)
|
|
else:
|
|
print("error invalid scheduler", self.scheduler)
|
|
return sigmas
|
|
|
|
def sampler_object(name):
|
|
if name == "uni_pc":
|
|
sampler = UNIPC()
|
|
elif name == "uni_pc_bh2":
|
|
sampler = UNIPCBH2()
|
|
elif name == "ddim":
|
|
sampler = ksampler("euler", inpaint_options={"random": True})
|
|
else:
|
|
sampler = ksampler(name)
|
|
return sampler
|
|
|
|
class KSampler:
|
|
SCHEDULERS = SCHEDULER_NAMES
|
|
SAMPLERS = SAMPLER_NAMES
|
|
|
|
def __init__(self, model, steps, device, sampler=None, scheduler=None, denoise=None, model_options={}):
|
|
self.model = model
|
|
self.device = device
|
|
if scheduler not in self.SCHEDULERS:
|
|
scheduler = self.SCHEDULERS[0]
|
|
if sampler not in self.SAMPLERS:
|
|
sampler = self.SAMPLERS[0]
|
|
self.scheduler = scheduler
|
|
self.sampler = sampler
|
|
self.set_steps(steps, denoise)
|
|
self.denoise = denoise
|
|
self.model_options = model_options
|
|
|
|
def calculate_sigmas(self, steps):
|
|
sigmas = None
|
|
|
|
discard_penultimate_sigma = False
|
|
if self.sampler in ['dpm_2', 'dpm_2_ancestral', 'uni_pc', 'uni_pc_bh2']:
|
|
steps += 1
|
|
discard_penultimate_sigma = True
|
|
|
|
sigmas = calculate_sigmas_scheduler(self.model, self.scheduler, steps)
|
|
|
|
if discard_penultimate_sigma:
|
|
sigmas = torch.cat([sigmas[:-2], sigmas[-1:]])
|
|
return sigmas
|
|
|
|
def set_steps(self, steps, denoise=None):
|
|
self.steps = steps
|
|
if denoise is None or denoise > 0.9999:
|
|
self.sigmas = self.calculate_sigmas(steps).to(self.device)
|
|
else:
|
|
new_steps = int(steps/denoise)
|
|
sigmas = self.calculate_sigmas(new_steps).to(self.device)
|
|
self.sigmas = sigmas[-(steps + 1):]
|
|
|
|
def sample(self, noise, positive, negative, cfg, latent_image=None, start_step=None, last_step=None, force_full_denoise=False, denoise_mask=None, sigmas=None, callback=None, disable_pbar=False, seed=None):
|
|
if sigmas is None:
|
|
sigmas = self.sigmas
|
|
|
|
if last_step is not None and last_step < (len(sigmas) - 1):
|
|
sigmas = sigmas[:last_step + 1]
|
|
if force_full_denoise:
|
|
sigmas[-1] = 0
|
|
|
|
if start_step is not None:
|
|
if start_step < (len(sigmas) - 1):
|
|
sigmas = sigmas[start_step:]
|
|
else:
|
|
if latent_image is not None:
|
|
return latent_image
|
|
else:
|
|
return torch.zeros_like(noise)
|
|
|
|
sampler = sampler_object(self.sampler)
|
|
|
|
return sample(self.model, noise, positive, negative, cfg, self.device, sampler, sigmas, self.model_options, latent_image=latent_image, denoise_mask=denoise_mask, callback=callback, disable_pbar=disable_pbar, seed=seed)
|