539 lines
22 KiB
Python
539 lines
22 KiB
Python
from .k_diffusion import sampling as k_diffusion_sampling
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from .k_diffusion import external as k_diffusion_external
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from .extra_samplers import uni_pc
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import torch
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import contextlib
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import model_management
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from .ldm.models.diffusion.ddim import DDIMSampler
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from .ldm.modules.diffusionmodules.util import make_ddim_timesteps
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class CFGDenoiser(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):
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if len(uncond[0]) == len(cond[0]) and x.shape[0] * x.shape[2] * x.shape[3] < (96 * 96): #TODO check memory instead
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x_in = torch.cat([x] * 2)
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sigma_in = torch.cat([sigma] * 2)
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cond_in = torch.cat([uncond, cond])
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uncond, cond = self.inner_model(x_in, sigma_in, cond=cond_in).chunk(2)
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else:
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cond = self.inner_model(x, sigma, cond=cond)
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uncond = self.inner_model(x, sigma, cond=uncond)
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return uncond + (cond - uncond) * cond_scale
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#The main sampling function shared by all the samplers
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#Returns predicted noise
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def sampling_function(model_function, x, timestep, uncond, cond, cond_scale, cond_concat=None, model_options={}):
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def get_area_and_mult(cond, x_in, cond_concat_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 'area' in cond[1]:
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area = cond[1]['area']
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if 'strength' in cond[1]:
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strength = cond[1]['strength']
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adm_cond = None
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if 'adm' in cond[1]:
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adm_cond = cond[1]['adm']
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input_x = x_in[:,:,area[2]:area[0] + area[2],area[3]:area[1] + area[3]]
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mult = torch.ones_like(input_x) * strength
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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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conditionning['c_crossattn'] = cond[0]
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if cond_concat_in is not None and len(cond_concat_in) > 0:
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cropped = []
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for x in cond_concat_in:
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cr = x[:,:,area[2]:area[0] + area[2],area[3]:area[1] + area[3]]
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cropped.append(cr)
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conditionning['c_concat'] = torch.cat(cropped, dim=1)
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if adm_cond is not None:
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conditionning['c_adm'] = adm_cond
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control = None
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if 'control' in cond[1]:
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control = cond[1]['control']
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return (input_x, mult, conditionning, area, control)
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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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if 'c_crossattn' in c1:
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if c1['c_crossattn'].shape != c2['c_crossattn'].shape:
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return False
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if 'c_concat' in c1:
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if c1['c_concat'].shape != c2['c_concat'].shape:
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return False
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if 'c_adm' in c1:
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if c1['c_adm'].shape != c2['c_adm'].shape:
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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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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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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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for x in c_list:
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if 'c_crossattn' in x:
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c_crossattn.append(x['c_crossattn'])
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if 'c_concat' in x:
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c_concat.append(x['c_concat'])
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if 'c_adm' in x:
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c_adm.append(x['c_adm'])
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out = {}
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if len(c_crossattn) > 0:
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out['c_crossattn'] = [torch.cat(c_crossattn)]
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if len(c_concat) > 0:
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out['c_concat'] = [torch.cat(c_concat)]
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if len(c_adm) > 0:
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out['c_adm'] = torch.cat(c_adm)
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return out
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def calc_cond_uncond_batch(model_function, cond, uncond, x_in, timestep, max_total_area, cond_concat_in, model_options):
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out_cond = torch.zeros_like(x_in)
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out_count = torch.ones_like(x_in)/100000.0
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out_uncond = torch.zeros_like(x_in)
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out_uncond_count = torch.ones_like(x_in)/100000.0
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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, cond_concat_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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for x in uncond:
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p = get_area_and_mult(x, x_in, cond_concat_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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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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if (len(batch_amount) * first_shape[0] * first_shape[2] * first_shape[3] < max_total_area):
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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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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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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['c_crossattn'], len(cond_or_uncond))
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if 'transformer_options' in model_options:
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c['transformer_options'] = model_options['transformer_options']
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output = model_function(input_x, timestep_, cond=c).chunk(batch_chunks)
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del input_x
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model_management.throw_exception_if_processing_interrupted()
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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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max_total_area = model_management.maximum_batch_area()
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cond, uncond = calc_cond_uncond_batch(model_function, cond, uncond, x, timestep, max_total_area, cond_concat, model_options)
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return uncond + (cond - uncond) * cond_scale
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class CompVisVDenoiser(k_diffusion_external.DiscreteVDDPMDenoiser):
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def __init__(self, model, quantize=False, device='cpu'):
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super().__init__(model, model.alphas_cumprod, quantize=quantize)
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def get_v(self, x, t, cond, **kwargs):
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return self.inner_model.apply_model(x, t, cond, **kwargs)
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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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self.alphas_cumprod = model.alphas_cumprod
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def apply_model(self, x, timestep, cond, uncond, cond_scale, cond_concat=None, model_options={}):
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out = sampling_function(self.inner_model.apply_model, x, timestep, uncond, cond, cond_scale, cond_concat, model_options=model_options)
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return out
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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, cond_concat=None, model_options={}):
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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, cond_concat=cond_concat, model_options=model_options)
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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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sigs = []
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ss = len(model.sigmas) / steps
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for x in range(steps):
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sigs += [float(model.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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sigs = []
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ddim_timesteps = make_ddim_timesteps(ddim_discr_method="uniform", num_ddim_timesteps=steps, num_ddpm_timesteps=model.inner_model.inner_model.num_timesteps, verbose=False)
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for x in range(len(ddim_timesteps) - 1, -1, -1):
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ts = ddim_timesteps[x]
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if ts > 999:
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ts = 999
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sigs.append(model.t_to_sigma(torch.tensor(ts)))
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sigs += [0.0]
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return torch.FloatTensor(sigs)
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def blank_inpaint_image_like(latent_image):
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blank_image = torch.ones_like(latent_image)
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# these are the values for "zero" in pixel space translated to latent space
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blank_image[:,0] *= 0.8223
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blank_image[:,1] *= -0.6876
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blank_image[:,2] *= 0.6364
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blank_image[:,3] *= 0.1380
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return blank_image
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def create_cond_with_same_area_if_none(conds, c):
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if 'area' not in c[1]:
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return
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c_area = c[1]['area']
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smallest = None
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for x in conds:
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if 'area' in x[1]:
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a = x[1]['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[1]:
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smallest = x
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else:
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if smallest[1]['area'][0] * smallest[1]['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[1]:
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if smallest[1]['area'] == c_area:
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return
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n = c[1].copy()
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conds += [[smallest[0], n]]
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def apply_control_net_to_equal_area(conds, uncond):
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cond_cnets = []
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cond_other = []
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uncond_cnets = []
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uncond_other = []
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for t in range(len(conds)):
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x = conds[t]
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if 'area' not in x[1]:
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if 'control' in x[1] and x[1]['control'] is not None:
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cond_cnets.append(x[1]['control'])
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else:
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cond_other.append((x, t))
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for t in range(len(uncond)):
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x = uncond[t]
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if 'area' not in x[1]:
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if 'control' in x[1] and x[1]['control'] is not None:
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uncond_cnets.append(x[1]['control'])
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else:
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uncond_other.append((x, t))
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if len(uncond_cnets) > 0:
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return
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for x in range(len(cond_cnets)):
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temp = uncond_other[x % len(uncond_other)]
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o = temp[0]
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if 'control' in o[1] and o[1]['control'] is not None:
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n = o[1].copy()
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n['control'] = cond_cnets[x]
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uncond += [[o[0], n]]
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else:
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n = o[1].copy()
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n['control'] = cond_cnets[x]
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uncond[temp[1]] = [o[0], n]
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def encode_adm(noise_augmentor, conds, batch_size, device):
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for t in range(len(conds)):
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x = conds[t]
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if 'adm' in x[1]:
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adm_inputs = []
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weights = []
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adm_in = x[1]["adm"]
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for adm_c in adm_in:
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adm_cond = adm_c[0].image_embeds
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weight = adm_c[1]
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c_adm, noise_level_emb = noise_augmentor(adm_cond.to(device), noise_level=torch.tensor([0], device=device))
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adm_out = torch.cat((c_adm, noise_level_emb), 1) * weight
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weights.append(weight)
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adm_inputs.append(adm_out)
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adm_out = torch.stack(adm_inputs).sum(0)
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#TODO: Apply Noise to Embedding Mix
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else:
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adm_out = torch.zeros((1, noise_augmentor.time_embed.dim * 2), device=device)
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x[1] = x[1].copy()
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x[1]["adm"] = torch.cat([adm_out] * batch_size)
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return conds
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class KSampler:
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SCHEDULERS = ["karras", "normal", "simple", "ddim_uniform"]
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SAMPLERS = ["euler", "euler_ancestral", "heun", "dpm_2", "dpm_2_ancestral",
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"lms", "dpm_fast", "dpm_adaptive", "dpmpp_2s_ancestral", "dpmpp_sde",
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"dpmpp_2m", "ddim", "uni_pc", "uni_pc_bh2"]
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def __init__(self, model, steps, device, sampler=None, scheduler=None, denoise=None, model_options={}):
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self.model = model
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self.model_denoise = CFGNoisePredictor(self.model)
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if self.model.parameterization == "v":
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self.model_wrap = CompVisVDenoiser(self.model_denoise, quantize=True)
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else:
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self.model_wrap = k_diffusion_external.CompVisDenoiser(self.model_denoise, quantize=True)
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self.model_wrap.parameterization = self.model.parameterization
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self.model_k = KSamplerX0Inpaint(self.model_wrap)
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self.device = device
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if scheduler not in self.SCHEDULERS:
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scheduler = self.SCHEDULERS[0]
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if sampler not in self.SAMPLERS:
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sampler = self.SAMPLERS[0]
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self.scheduler = scheduler
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self.sampler = sampler
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self.sigma_min=float(self.model_wrap.sigma_min)
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self.sigma_max=float(self.model_wrap.sigma_max)
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self.set_steps(steps, denoise)
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self.denoise = denoise
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self.model_options = model_options
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def _calculate_sigmas(self, steps):
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sigmas = None
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discard_penultimate_sigma = False
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if self.sampler in ['dpm_2', 'dpm_2_ancestral']:
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steps += 1
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discard_penultimate_sigma = True
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if self.scheduler == "karras":
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sigmas = k_diffusion_sampling.get_sigmas_karras(n=steps, sigma_min=self.sigma_min, sigma_max=self.sigma_max, device=self.device)
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elif self.scheduler == "normal":
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sigmas = self.model_wrap.get_sigmas(steps).to(self.device)
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elif self.scheduler == "simple":
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sigmas = simple_scheduler(self.model_wrap, steps).to(self.device)
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elif self.scheduler == "ddim_uniform":
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sigmas = ddim_scheduler(self.model_wrap, steps).to(self.device)
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else:
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print("error invalid scheduler", self.scheduler)
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if discard_penultimate_sigma:
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sigmas = torch.cat([sigmas[:-2], sigmas[-1:]])
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return sigmas
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def set_steps(self, steps, denoise=None):
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self.steps = steps
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if denoise is None or denoise > 0.9999:
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self.sigmas = self._calculate_sigmas(steps)
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else:
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new_steps = int(steps/denoise)
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sigmas = self._calculate_sigmas(new_steps)
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self.sigmas = sigmas[-(steps + 1):]
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def sample(self, noise, positive, negative, cfg, latent_image=None, start_step=None, last_step=None, force_full_denoise=False, denoise_mask=None):
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sigmas = self.sigmas
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sigma_min = self.sigma_min
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if last_step is not None and last_step < (len(sigmas) - 1):
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sigma_min = sigmas[last_step]
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sigmas = sigmas[:last_step + 1]
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|
if force_full_denoise:
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sigmas[-1] = 0
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|
|
|
if start_step is not None:
|
|
if start_step < (len(sigmas) - 1):
|
|
sigmas = sigmas[start_step:]
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|
else:
|
|
if latent_image is not None:
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|
return latent_image
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|
else:
|
|
return torch.zeros_like(noise)
|
|
|
|
positive = positive[:]
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|
negative = negative[:]
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|
#make sure each cond area has an opposite one with the same area
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|
for c in positive:
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|
create_cond_with_same_area_if_none(negative, c)
|
|
for c in negative:
|
|
create_cond_with_same_area_if_none(positive, c)
|
|
|
|
apply_control_net_to_equal_area(positive, negative)
|
|
|
|
if self.model.model.diffusion_model.dtype == torch.float16:
|
|
precision_scope = torch.autocast
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|
else:
|
|
precision_scope = contextlib.nullcontext
|
|
|
|
if hasattr(self.model, 'noise_augmentor'): #unclip
|
|
positive = encode_adm(self.model.noise_augmentor, positive, noise.shape[0], self.device)
|
|
negative = encode_adm(self.model.noise_augmentor, negative, noise.shape[0], self.device)
|
|
|
|
extra_args = {"cond":positive, "uncond":negative, "cond_scale": cfg, "model_options": self.model_options}
|
|
|
|
cond_concat = None
|
|
if hasattr(self.model, 'concat_keys'): #inpaint
|
|
cond_concat = []
|
|
for ck in self.model.concat_keys:
|
|
if denoise_mask is not None:
|
|
if ck == "mask":
|
|
cond_concat.append(denoise_mask[:,:1])
|
|
elif ck == "masked_image":
|
|
cond_concat.append(latent_image) #NOTE: the latent_image should be masked by the mask in pixel space
|
|
else:
|
|
if ck == "mask":
|
|
cond_concat.append(torch.ones_like(noise)[:,:1])
|
|
elif ck == "masked_image":
|
|
cond_concat.append(blank_inpaint_image_like(noise))
|
|
extra_args["cond_concat"] = cond_concat
|
|
|
|
if sigmas[0] != self.sigmas[0] or (self.denoise is not None and self.denoise < 1.0):
|
|
max_denoise = False
|
|
else:
|
|
max_denoise = True
|
|
|
|
with precision_scope(model_management.get_autocast_device(self.device)):
|
|
if self.sampler == "uni_pc":
|
|
samples = uni_pc.sample_unipc(self.model_wrap, noise, latent_image, sigmas, sampling_function=sampling_function, max_denoise=max_denoise, extra_args=extra_args, noise_mask=denoise_mask)
|
|
elif self.sampler == "uni_pc_bh2":
|
|
samples = uni_pc.sample_unipc(self.model_wrap, noise, latent_image, sigmas, sampling_function=sampling_function, max_denoise=max_denoise, extra_args=extra_args, noise_mask=denoise_mask, variant='bh2')
|
|
elif self.sampler == "ddim":
|
|
timesteps = []
|
|
for s in range(sigmas.shape[0]):
|
|
timesteps.insert(0, self.model_wrap.sigma_to_t(sigmas[s]))
|
|
noise_mask = None
|
|
if denoise_mask is not None:
|
|
noise_mask = 1.0 - denoise_mask
|
|
sampler = DDIMSampler(self.model, device=self.device)
|
|
sampler.make_schedule_timesteps(ddim_timesteps=timesteps, verbose=False)
|
|
z_enc = sampler.stochastic_encode(latent_image, torch.tensor([len(timesteps) - 1] * noise.shape[0]).to(self.device), noise=noise, max_denoise=max_denoise)
|
|
samples, _ = sampler.sample_custom(ddim_timesteps=timesteps,
|
|
conditioning=positive,
|
|
batch_size=noise.shape[0],
|
|
shape=noise.shape[1:],
|
|
verbose=False,
|
|
unconditional_guidance_scale=cfg,
|
|
unconditional_conditioning=negative,
|
|
eta=0.0,
|
|
x_T=z_enc,
|
|
x0=latent_image,
|
|
denoise_function=sampling_function,
|
|
extra_args=extra_args,
|
|
mask=noise_mask,
|
|
to_zero=sigmas[-1]==0,
|
|
end_step=sigmas.shape[0] - 1)
|
|
|
|
else:
|
|
extra_args["denoise_mask"] = denoise_mask
|
|
self.model_k.latent_image = latent_image
|
|
self.model_k.noise = noise
|
|
|
|
noise = noise * sigmas[0]
|
|
|
|
if latent_image is not None:
|
|
noise += latent_image
|
|
if self.sampler == "dpm_fast":
|
|
samples = k_diffusion_sampling.sample_dpm_fast(self.model_k, noise, sigma_min, sigmas[0], self.steps, extra_args=extra_args)
|
|
elif self.sampler == "dpm_adaptive":
|
|
samples = k_diffusion_sampling.sample_dpm_adaptive(self.model_k, noise, sigma_min, sigmas[0], extra_args=extra_args)
|
|
else:
|
|
samples = getattr(k_diffusion_sampling, "sample_{}".format(self.sampler))(self.model_k, noise, sigmas, extra_args=extra_args)
|
|
|
|
return samples.to(torch.float32)
|