204 lines
9.0 KiB
Python
204 lines
9.0 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (c) Alibaba, Inc. and its affiliates.
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import copy
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import random
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import torch
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from scepter.modules.model.network.diffusion.diffusion import GaussianDiffusion
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from scepter.modules.utils.distribute import we
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from .control_inference import ControlInference
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from .diffusion_inference import DiffusionInference, get_model
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from .tuner_inference import TunerInference
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class PixArtInference(DiffusionInference):
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'''
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define vae, unet, text-encoder, tuner, refiner components
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support to load the components dynamicly.
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create and load model when run this model at the first time.
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'''
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def __init__(self, logger=None):
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self.logger = logger
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self.is_redefine_paras = False
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self.loaded_model = {}
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self.loaded_model_name = [
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'diffusion_model', 'first_stage_model', 'cond_stage_model'
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]
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self.diffusion_insclass = GaussianDiffusion
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self.tuner_infer = TunerInference(self.logger)
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self.control_infer = ControlInference(self.logger)
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@torch.no_grad()
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def __call__(self,
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input,
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num_samples=1,
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intermediate_callback=None,
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refine_strength=0,
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img_to_img_strength=0,
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cat_uc=True,
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tuner_model=None,
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control_model=None,
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**kwargs):
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value_input = copy.deepcopy(self.input)
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value_input.update(input)
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print(value_input)
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height, width = value_input['target_size_as_tuple']
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value_output = copy.deepcopy(self.output)
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# register tuner
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if tuner_model is not None and tuner_model != '' and len(
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tuner_model) > 0:
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if not isinstance(tuner_model, list):
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tuner_model = [tuner_model]
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self.dynamic_load(self.diffusion_model, 'diffusion_model')
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self.dynamic_load(self.cond_stage_model, 'cond_stage_model')
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self.tuner_infer.register_tuner(tuner_model, self.diffusion_model,
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self.cond_stage_model)
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self.dynamic_unload(self.diffusion_model,
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'diffusion_model',
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skip_loaded=True)
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self.dynamic_unload(self.cond_stage_model,
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'cond_stage_model',
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skip_loaded=True)
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# cond stage
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self.dynamic_load(self.cond_stage_model, 'cond_stage_model')
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function_name, dtype = self.get_function_info(self.cond_stage_model)
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with torch.autocast('cuda',
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enabled=dtype == 'float16',
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dtype=getattr(torch, dtype)):
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context, null_context = {}, {}
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cont_mask = None
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cont, cont_mask = getattr(get_model(self.cond_stage_model),
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function_name)(value_input['prompt'],
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return_mask=True)
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context['crossattn'] = cont.float()
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self.dynamic_load(self.diffusion_model, 'diffusion_model')
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null_context['crossattn'] = get_model(
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self.diffusion_model).y_embedder.y_embedding[None].repeat(
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num_samples, 1, 1)
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self.dynamic_unload(self.diffusion_model, 'diffusion_model')
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self.dynamic_unload(self.cond_stage_model,
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'cond_stage_model',
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skip_loaded=True)
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# get noise
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seed = kwargs.pop('seed', -1)
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g = torch.Generator(device=we.device_id)
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seed = seed if seed >= 0 else random.randint(0, 2**32 - 1)
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g.manual_seed(seed)
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if 'seed' in value_output:
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value_output['seed'] = seed
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for sample_id in range(num_samples):
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if self.diffusion_model is not None:
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noise = torch.empty(
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1,
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4,
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height // self.first_stage_model['paras']['size_factor'],
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width // self.first_stage_model['paras']['size_factor'],
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device=we.device_id).normal_(generator=g)
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self.dynamic_load(self.diffusion_model, 'diffusion_model')
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# UNet use input n_prompt
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function_name, dtype = self.get_function_info(
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self.diffusion_model)
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with torch.autocast('cuda',
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enabled=dtype == 'float16',
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dtype=getattr(torch, dtype)):
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latent = self.diffusion.sample(
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solver=value_input.get('sample', 'ddim'),
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noise=noise,
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model=get_model(self.diffusion_model),
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model_kwargs=[{
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'cond': context,
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'mask': cont_mask,
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'data_info': {
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'img_hw':
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torch.tensor([[height, width]],
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dtype=torch.float,
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device=we.device_id).repeat(
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num_samples, 1),
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'aspect_ratio':
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torch.tensor([[1.]],
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device=we.device_id).repeat(
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num_samples, 1)
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}
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}, {
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'cond': null_context,
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'mask': cont_mask,
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'data_info': {
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'img_hw':
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torch.tensor([[height, width]],
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dtype=torch.float,
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device=we.device_id).repeat(
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num_samples, 1),
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'aspect_ratio':
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torch.tensor([[1.]],
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device=we.device_id).repeat(
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num_samples, 1)
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}
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}],
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cat_uc=False,
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steps=value_input.get('sample_steps', 50),
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guide_scale=value_input.get('guide_scale', 7.5),
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guide_rescale=value_input.get('guide_rescale', 0.5),
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discretization=value_input.get('discretization',
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'trailing'),
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show_progress=True,
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seed=seed,
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condition_fn=None,
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clamp=None,
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percentile=None,
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t_max=None,
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t_min=None,
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discard_penultimate_step=None,
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return_intermediate=None,
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**kwargs)
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self.dynamic_unload(self.diffusion_model,
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'diffusion_model',
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skip_loaded=True)
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if 'latent' in value_output:
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if value_output['latent'] is None or (
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isinstance(value_output['latent'], list)
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and len(value_output['latent']) < 1):
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value_output['latent'] = []
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value_output['latent'].append(latent)
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self.dynamic_load(self.first_stage_model, 'first_stage_model')
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x_samples = self.decode_first_stage(latent).float()
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self.dynamic_unload(self.first_stage_model,
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'first_stage_model',
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skip_loaded=True)
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images = torch.clamp((x_samples + 1.0) / 2.0, min=0.0, max=1.0)
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if 'images' in value_output:
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if value_output['images'] is None or (
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isinstance(value_output['images'], list)
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and len(value_output['images']) < 1):
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value_output['images'] = []
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value_output['images'].append(images)
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for k, v in value_output.items():
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if isinstance(v, list):
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value_output[k] = torch.cat(v, dim=0)
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if isinstance(v, torch.Tensor):
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value_output[k] = v.cpu()
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# unregister tuner
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if tuner_model is not None and tuner_model != '' and len(
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tuner_model) > 0:
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self.tuner_infer.unregister_tuner(tuner_model,
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self.diffusion_model,
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self.cond_stage_model)
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# unregister control
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if control_model is not None and control_model != '':
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self.control_infer.unregister_controllers(control_model,
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self.diffusion_model)
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return value_output
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