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import torch
from modules import sd_samplers_kdiffusion, sd_samplers_common
from ldm_patched.k_diffusion import sampling as k_diffusion_sampling
from ldm_patched.modules.samplers import calculate_sigmas_scheduler
class AlterSampler(sd_samplers_kdiffusion.KDiffusionSampler):
def __init__(self, sd_model, sampler_name, scheduler_name):
self.sampler_name = sampler_name
self.scheduler_name = scheduler_name
self.unet = sd_model.forge_objects.unet
sampler_function = getattr(k_diffusion_sampling, "sample_{}".format(sampler_name))
super().__init__(sampler_function, sd_model, None)
def get_sigmas(self, p, steps):
if self.scheduler_name == 'turbo':
timesteps = torch.flip(torch.arange(1, steps + 1) * float(1000.0 / steps) - 1, (0,)).round().long().clip(0, 999)
sigmas = self.unet.model.model_sampling.sigma(timesteps)
sigmas = torch.cat([sigmas, sigmas.new_zeros([1])])
else:
sigmas = calculate_sigmas_scheduler(self.unet.model, self.scheduler_name, steps)
return sigmas.to(self.unet.load_device)
def build_constructor(sampler_name, scheduler_name):
def constructor(m):
return AlterSampler(m, sampler_name, scheduler_name)
return constructor
samplers_data_alter = [
sd_samplers_common.SamplerData('DDPM', build_constructor(sampler_name='ddpm', scheduler_name='normal'), ['ddpm'], {}),
sd_samplers_common.SamplerData('DDPM Karras', build_constructor(sampler_name='ddpm', scheduler_name='karras'), ['ddpm_karras'], {}),
sd_samplers_common.SamplerData('Euler A Turbo', build_constructor(sampler_name='euler_ancestral', scheduler_name='turbo'), ['euler_ancestral_turbo'], {}),
sd_samplers_common.SamplerData('DPM++ 2M Turbo', build_constructor(sampler_name='dpmpp_2m', scheduler_name='turbo'), ['dpmpp_2m_turbo'], {}),
sd_samplers_common.SamplerData('DPM++ 2M SDE Turbo', build_constructor(sampler_name='dpmpp_2m_sde', scheduler_name='turbo'), ['dpmpp_2m_sde_turbo'], {}),
sd_samplers_common.SamplerData('LCM Karras', build_constructor(sampler_name='lcm', scheduler_name='karras'), ['lcm_karras'], {}),
sd_samplers_common.SamplerData('Euler SGMUniform', build_constructor(sampler_name='euler', scheduler_name='sgm_uniform'), ['euler_sgm_uniform'], {}),
sd_samplers_common.SamplerData('Euler A SGMUniform', build_constructor(sampler_name='euler_ancestral', scheduler_name='sgm_uniform'), ['euler_ancestral_sgm_uniform'], {}),
sd_samplers_common.SamplerData('DPM++ 2M SGMUniform', build_constructor(sampler_name='dpmpp_2m', scheduler_name='sgm_uniform'), ['dpmpp_2m_sgm_uniform'], {}),
sd_samplers_common.SamplerData('DPM++ 2M SDE SGMUniform', build_constructor(sampler_name='dpmpp_2m_sde', scheduler_name='sgm_uniform'), ['dpmpp_2m_sde_sgm_uniform'], {}),
]
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