diff --git a/sd-forge-extra-samplers/.github/workflows/ruff.yaml b/sd-forge-extra-samplers/.github/workflows/ruff.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..1224231ebeb25c67af47ffce06515565ce84aca1
--- /dev/null
+++ b/sd-forge-extra-samplers/.github/workflows/ruff.yaml
@@ -0,0 +1,8 @@
+name: Ruff
+on: [pull_request]
+jobs:
+ ruff:
+ runs-on: ubuntu-latest
+ steps:
+ - uses: actions/checkout@v4
+ - uses: astral-sh/ruff-action@v1
diff --git a/sd-forge-extra-samplers/.gitignore b/sd-forge-extra-samplers/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..8ce58e54540d4f142b26e0a7e06c2c0ac87f3401
--- /dev/null
+++ b/sd-forge-extra-samplers/.gitignore
@@ -0,0 +1,163 @@
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+# Usually these files are written by a python script from a template
+# before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+# For a library or package, you might want to ignore these files since the code is
+# intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+# According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+# However, in case of collaboration, if having platform-specific dependencies or dependencies
+# having no cross-platform support, pipenv may install dependencies that don't work, or not
+# install all needed dependencies.
+#Pipfile.lock
+
+# poetry
+# Similar to Pipfile.lock, it is generally recommended to include poetry.lock in version control.
+# This is especially recommended for binary packages to ensure reproducibility, and is more
+# commonly ignored for libraries.
+# https://python-poetry.org/docs/basic-usage/#commit-your-poetrylock-file-to-version-control
+#poetry.lock
+
+# pdm
+# Similar to Pipfile.lock, it is generally recommended to include pdm.lock in version control.
+#pdm.lock
+# pdm stores project-wide configurations in .pdm.toml, but it is recommended to not include it
+# in version control.
+# https://pdm.fming.dev/latest/usage/project/#working-with-version-control
+.pdm.toml
+.pdm-python
+.pdm-build/
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow and github.com/pdm-project/pdm
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static type analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# PyCharm
+# JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+# be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+# and can be added to the global gitignore or merged into this file. For a more nuclear
+# option (not recommended) you can uncomment the following to ignore the entire idea folder.
+#.idea/
\ No newline at end of file
diff --git a/sd-forge-extra-samplers/LICENSE b/sd-forge-extra-samplers/LICENSE
new file mode 100644
index 0000000000000000000000000000000000000000..f288702d2fa16d3cdf0035b15a9fcbc552cd88e7
--- /dev/null
+++ b/sd-forge-extra-samplers/LICENSE
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ Preamble
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+ The licenses for most software and other practical works are designed
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+any other work released this way by its authors. You can apply it to
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diff --git a/sd-forge-extra-samplers/README.md b/sd-forge-extra-samplers/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..d0c319c99b6be3d91b0df9055031fd334f5daec8
--- /dev/null
+++ b/sd-forge-extra-samplers/README.md
@@ -0,0 +1,97 @@
+# Overview
+
+This repository provides additional samplers to the Forge WebUI.
+
+## Features
+
+- Additional samplers integrated into the Forge WebUI.
+ - Adaptive Progressive (Experimental)
+ - Euler Max
+ - Euler Negative
+ - Euler Dy
+ - Euler Dy Negative
+ - Euler SMEA
+ - Euler SMEA Dy
+ - Euler SMEA Dy Negative
+ - Euler Multipass
+ - Euler Multipass CFG++
+ - Euler a Multipass
+ - Euler a Multipass CFG++
+ - Extended Reverse Time SDE
+ - Gradient Estimation
+ - Heun Ancestral
+ - Kohaku LoNyu Yog
+ - Langevin Euler (Experimental)
+ - Res Multistep
+ - Res Multistep CFG++
+ - Res Multistep Ancestral
+ - Res Multistep Ancestral CFG++
+
+- Additional Schedulers
+ - Linear Log
+
+Adds a new extension accordian titled "Extra Samplers" to allow adjusting certain samplers.
+
+## Installation
+
+### Clone from Git
+
+1. Navigate to the extension directory in your WebUI installation
+1. Clone the repository:
+ ```sh
+ git clone https://github.com/MisterChief95/sd-forge-extra-samplers.git
+ ```
+1. Start WebUI
+
+### Install from URL
+
+1. Open the Extensions tab in the web UI.
+2. Go to the "Install from URL" section.
+3. Enter: `https://github.com/MisterChief95/sd-forge-extra-samplers.git` in the "URL for extension's git repository" box.
+4. Click "Install".
+5. Restart WebUI
+
+## Usage
+
+1. Open the WebUI.
+2. Navigate to the sampler settings.
+3. Select one of the newly added Euler samplers from the list.
+4. Generate images as usual.
+
+### Important
+- Not all samplers work well in every situation. Some will look poor when used for img2img/hires fix.
+- Mix-and-match samplers to find the best combinations. A sampler might look bad with one scheduler but good with another!
+
+## Contributing
+
+Contributions are welcome! Please open an issue or submit a pull request for any improvements or bug fixes.
+
+## Acknowledgements
+
+If any of these are incorrect please let me know!
+
+- Thanks to the developers of Automatic1111 and Forge.
+- [Koishi-Star](https://github.com/Koishi-Star/Euler-Smea-Dyn-Sampler) for the following sampler contributions:
+ - Euler Negative
+ - Euler Dy
+ - Euler Dy Negative
+ - Euler SMEA Dy (Euler SMEA Dy Negative based on this)
+ - Kohaku LoNyu Yog
+- [licyk](https://github.com/licyk/advanced_euler_sampler_extension/tree/main) for the following sampler contributions:
+ - Euler Max
+ - Euler SMEA
+- [Panchovix](https://github.com/Panchovix/stable-diffusion-webui-reForge) for the following sampler contributions:
+ - Res Multistep
+ - Res Multistep CFG++
+- [comfyanonymous](https://github.com/comfyanonymous/ComfyUI) for the following sampler contributions:
+ - Gradient Estimation
+ - Extended Reverse Time SDE
+ - Res Multistep
+ - Res Multistep CFG++
+ - Res Multistep Ancestral
+ - Res Multistep Ancestral CFG++
+- Euler Multipass
+ - Original Implementation: [aria1th](https://github.com/aria1th)
+ - CFG++ Implementation: [LaVie024](https://github.com/LaVie024)
+ - Final ComfyUI implementation: [catboxanon](https://github.com/catboxanon)
+- Special thanks to the contributors of this repository.
diff --git a/sd-forge-extra-samplers/lib_es/__init__.py b/sd-forge-extra-samplers/lib_es/__init__.py
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diff --git a/sd-forge-extra-samplers/lib_es/const.py b/sd-forge-extra-samplers/lib_es/const.py
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+# Adaptive Progressive
+AP_EULER_A_END = "exs_ap_euler_a_end"
+AP_DPM_2M_END = "exs_ap_dpm_2m_end"
+AP_ANCESTRAL_ETA = "exs_ap_ancestral_eta"
+AP_DETAIL_STRENGTH = "exs_ap_detail_strength"
+
+# Langevin Euler
+LANGEVIN_STRENGTH = "exs_langevin_strength"
+
+# Extended Reverse-Time
+ER_MAX_STAGE = "er_max_stage"
+
+# Gradient Estimation
+GE_GAMMA = "ge_gamma"
+GE_GAMMA_OFFSET = "ge_gamma_offset"
+GE_USE_ADAPTIVE_STEPS = "ge_use_adaptive_steps"
+GE_USE_TIMESTEP_ADAPTIVE_GAMMA = "ge_use_timestep_adaptive_gamma"
+GE_VALIDATE_SCHEDULE = "ge_validate_schedule"
+
+GE_DEFAULT_GAMMA = 2.0
+GE_MIN_GAMMA = 1.0
+GE_MAX_GAMMA = 3.0
+GE_DEFAULT_GAMMA_OFFSET = 0.0
+GE_MIN_GAMMA_OFFSET = -1.0
+GE_MAX_GAMMA_OFFSET = 1.0
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/__init__.py b/sd-forge-extra-samplers/lib_es/extra_samplers/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..488dd1dd01077630f8e093c29ab54ffc712a7f42
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/__init__.py
@@ -0,0 +1,49 @@
+#from lib_es.extra_samplers.adaptive_progressive import sample_adaptive_progressive
+from lib_es.extra_samplers.euler_dy import sample_euler_dy
+from lib_es.extra_samplers.euler_dy_negative import sample_euler_dy_negative
+from lib_es.extra_samplers.euler_smea import sample_euler_smea
+from lib_es.extra_samplers.euler_smea_dy import sample_euler_smea_dy
+from lib_es.extra_samplers.euler_smea_dy_negative import sample_euler_smea_dy_negative
+from lib_es.extra_samplers.euler_max import sample_euler_max
+from lib_es.extra_samplers.euler_multipass import (
+ sample_euler_multipass,
+ sample_euler_multipass_cfg_pp,
+ sample_euler_ancestral_multipass,
+ sample_euler_ancestral_multipass_cfg_pp,
+)
+from lib_es.extra_samplers.euler_negative import sample_euler_negative
+from lib_es.extra_samplers.extended_reverse_time import sample_er_sde
+from lib_es.extra_samplers.gradient_estimation import sample_gradient_estimation
+from lib_es.extra_samplers.heun_ancestral import sample_heun_ancestral
+from lib_es.extra_samplers.kohaku_lonyu_yog import sample_kohaku_lonyu_yog
+from lib_es.extra_samplers.langevin_euler import sample_langevin_euler
+#from lib_es.extra_samplers.res_multistep import (
+ #sample_res_multistep,
+ #sample_res_multistep_cfg_pp,
+ #sample_res_multistep_ancestral,
+ #sample_res_multistep_ancestral_cfg_pp,
+#)
+
+__sampler_funcs__ = [
+ #sample_adaptive_progressive,
+ sample_euler_max,
+ sample_euler_negative,
+ sample_euler_dy,
+ sample_euler_dy_negative,
+ sample_euler_smea,
+ sample_euler_smea_dy,
+ sample_euler_smea_dy_negative,
+ sample_euler_multipass,
+ sample_euler_multipass_cfg_pp,
+ sample_euler_ancestral_multipass,
+ sample_euler_ancestral_multipass_cfg_pp,
+ sample_er_sde,
+ sample_gradient_estimation,
+ sample_heun_ancestral,
+ sample_kohaku_lonyu_yog,
+ sample_langevin_euler,
+ #sample_res_multistep_ancestral_cfg_pp,
+ #sample_res_multistep_ancestral,
+ #sample_res_multistep_cfg_pp,
+ #sample_res_multistep,
+]
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diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/adaptive_progressive.py b/sd-forge-extra-samplers/lib_es/extra_samplers/adaptive_progressive.py
new file mode 100644
index 0000000000000000000000000000000000000000..3c0c2311d69b4f8cc8602e676cf99c99b6b6d3e5
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/adaptive_progressive.py
@@ -0,0 +1,227 @@
+import math
+import torch
+from tqdm.auto import trange
+from k_diffusion.sampling import to_d, get_ancestral_step
+#from backend.modules.k_diffusion_extra import default_noise_sampler
+
+import lib_es.const as consts
+from lib_es.utils import sampler_metadata
+
+
+@sampler_metadata(
+ "Adaptive Progressive",
+ {"scheduler": "sgm_uniform", "uses_ensd": True},
+)
+@torch.no_grad()
+def sample_adaptive_progressive(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ s_noise=1.0,
+ noise_sampler=None,
+):
+ """
+ Adaptive progressive sampler that automatically adjusts to different step counts.
+ Combines Euler ancestral, DPM++ 2M, and detail enhancement with phase-based transitions.
+
+ This sampler is optimized for both high and very low step counts (4+),
+ dynamically adjusting phase durations based on total step count.
+
+ Args:
+ model: The denoising model
+ x: Input noise tensor
+ sigmas: Noise schedule
+ extra_args: Additional arguments for the model
+ callback: Optional callback function
+ disable: Whether to disable the progress bar
+ s_churn: Amount of stochasticity
+ s_tmin: Minimum sigma for stochasticity
+ s_tmax: Maximum sigma for stochasticity
+ eta: Ancestral noise parameter
+ s_noise: Noise scale
+ noise_sampler: Custom noise sampler function
+ detail_strength: Strength of detail enhancement phase
+
+ Returns:
+ Denoised tensor
+ """
+ extra_args = {} if extra_args is None else extra_args
+ noise_sampler = default_noise_sampler(x) if noise_sampler is None else noise_sampler
+ s_in = x.new_ones([x.shape[0]])
+ steps = len(sigmas) - 1
+
+ euler_a_end = getattr(model.p, consts.AP_EULER_A_END, 0.35)
+ dpm_2m_end = getattr(model.p, consts.AP_DPM_2M_END, 0.75)
+ ancestral_eta = getattr(model.p, consts.AP_ANCESTRAL_ETA, 0.4)
+ detail_strength = getattr(model.p, consts.AP_DETAIL_STRENGTH, 1.5)
+
+ # Store previous steps' information
+ prev_d = None
+ prev_denoised = None
+
+ euler_end, dpm_end = calc_phase_bounds(steps, euler_a_end, dpm_2m_end)
+
+ for i in trange(steps, disable=disable):
+ progress = i / steps
+
+ # Calculate weights based on phase
+ if progress < euler_end:
+ # Euler ancestral phase
+ w_euler = 1.0
+ w_multi = 0.0
+ w_detail = 0.0
+ elif progress < dpm_end:
+ # DPM++ phase - smooth transition from Euler
+ phase_progress = (progress - euler_end) / (dpm_end - euler_end)
+ w_euler = max(0.0, 1.0 - phase_progress * 2.5) # Faster transition out of Euler
+ w_multi = 1.0 - w_euler
+ w_detail = 0.0
+ else:
+ # Detail refinement phase - gradual transition
+ phase_progress = (progress - dpm_end) / (1.0 - dpm_end)
+ w_euler = 0.0
+ w_multi = max(0.0, 1.0 - phase_progress * 1.5) # Gradual reduction in DPM++
+ w_detail = 1.0 - w_multi
+
+ # Apply adaptive stochasticity (only in early steps)
+ if s_churn > 0 and s_tmin <= sigmas[i] <= s_tmax and progress < 0.4:
+ # Scale down stochasticity as we progress
+ gamma = min(s_churn / steps, 2**0.5 - 1) * (1.0 - progress / 0.4)
+ sigma_hat = sigmas[i] * (gamma + 1)
+ eps = torch.randn_like(x) * s_noise
+ x = x + eps * (sigma_hat**2 - sigmas[i] ** 2).sqrt()
+ else:
+ sigma_hat = sigmas[i]
+
+ # Get denoised prediction
+ denoised = model(x, sigma_hat * s_in, **extra_args)
+
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigma_hat, "denoised": denoised})
+
+ # Calculate sigma for step
+ # Reduce eta as we progress to lower noise in later steps
+ step_eta = ancestral_eta if progress < 0.5 else ancestral_eta * (1.0 - min(1.0, (progress - 0.5) * 2.0))
+ sigma_down, sigma_up = get_ancestral_step(sigma_hat, sigmas[i + 1], eta=step_eta)
+
+ # Calculate current score
+ d = to_d(x, sigma_hat, denoised)
+ dt = sigma_down - sigma_hat
+
+ # Special case for final step
+ if sigmas[i + 1] == 0:
+ x = denoised
+ break
+
+ # Calculate step direction based on phase
+ if prev_d is None:
+ # First step is pure Euler ancestral
+ direction = d
+ else:
+ # Initialize direction
+ direction = torch.zeros_like(d)
+
+ # Add Euler component if needed
+ if w_euler > 0:
+ direction += w_euler * d
+
+ # Add DPM++ component if needed
+ if w_multi > 0:
+ # Adjust coefficients based on noise level
+ if sigma_hat > 2.0:
+ # Higher noise: favor current direction
+ c1, c2 = 0.7, 0.3
+ else:
+ # Lower noise: more balanced
+ c1, c2 = 0.6, 0.4
+
+ multi_direction = c1 * d + c2 * prev_d
+ direction += w_multi * multi_direction
+
+ # Add detail enhancement if needed
+ if w_detail > 0 and prev_denoised is not None:
+ # Only apply significant enhancement at lower noise levels
+ if sigma_hat < 1.0:
+ # Calculate detail vector (high frequency components)
+ detail_vector = denoised - prev_denoised
+
+ # Scale based on noise level - stronger at very low noise
+ detail_scale = detail_strength * min(1.0, 0.2 / (sigma_hat + 0.2))
+
+ # Apply detail enhancement with adaptive scaling
+ detail_direction = d + detail_vector * detail_scale / dt
+ direction += w_detail * detail_direction
+ else:
+ # At higher noise levels, use standard direction
+ direction += w_detail * d
+
+ # Ensure numerical stability
+ direction = torch.clamp(direction, -1e2, 1e2)
+
+ # Apply the step
+ x = x + direction * dt
+
+ # Apply ancestral noise with progressive reduction
+ if sigma_up > 0:
+ # Only add significant noise in earlier steps
+ noise_scale = s_noise
+ if progress > 0.3:
+ # Exponential reduction in noise after Euler phase
+ noise_scale *= math.exp(-4.0 * (progress - 0.3))
+
+ # Add the scaled noise
+ x = x + noise_sampler(sigma_hat, sigmas[i + 1]) * sigma_up * noise_scale
+
+ # Store values for next step
+ prev_d = d
+ prev_denoised = denoised
+
+ return x
+
+
+def calc_phase_bounds(steps: int, custom_euler_end: float = 0.25, custom_dpm_end: float = 0.7) -> tuple[float, float]:
+ """
+ Calculate phase boundaries for the adaptive progressive sampler.
+
+ Args:
+ steps: Total number of steps
+ custom_euler_end: End point for Euler phase (0.0-1.0)
+ custom_dpm_end: End point for DPM++ phase (0.0-1.0)
+
+ Returns:
+ Tuple of phase boundaries (Euler end, DPM++ end)
+ """
+ # Ensure values are within valid range
+ euler_end = max(0.0, min(1.0, custom_euler_end))
+ dpm_end = max(0.0, min(1.0, custom_dpm_end))
+
+ # Ensure euler_end < dpm_end
+ if euler_end >= dpm_end:
+ euler_end = max(0.0, dpm_end - 0.2) # Ensure at least 20% for DPM++ phase
+
+ # Adaptive phase boundaries based on step count
+ if steps < 10:
+ # For very low step counts, shorten Euler phase and extend detail phase
+ euler_end = min(euler_end, 0.15 + (steps - 4) * 0.01)
+ dpm_end = min(dpm_end, 0.5 + (steps - 4) * 0.02)
+ elif steps < 20:
+ # For low step counts, slightly adjust phases
+ euler_end = min(euler_end, 0.2)
+ dpm_end = min(dpm_end, 0.65)
+ elif steps > 50:
+ # For high step counts, extend the Euler phase slightly
+ euler_end = min(0.3, euler_end + (steps - 50) * 0.0005)
+ # And allow for a longer DPM++ phase
+ dpm_end = min(0.8, dpm_end + (steps - 50) * 0.0005)
+
+ # Ensure minimum phase lengths
+ if dpm_end - euler_end < 0.1:
+ dpm_end = min(1.0, euler_end + 0.1)
+
+ return euler_end, dpm_end
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/euler_dy.py b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_dy.py
new file mode 100644
index 0000000000000000000000000000000000000000..d83dfc3c36935e5998fc35834c33fd214f05cc06
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_dy.py
@@ -0,0 +1,50 @@
+import torch
+
+from k_diffusion.sampling import to_d
+
+from tqdm.auto import trange
+
+from lib_es.utils import dy_sampling_step
+from lib_es.utils import sampler_metadata
+
+
+@sampler_metadata("Euler Dy")
+@torch.no_grad()
+def sample_euler_dy(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ s_noise=1.0,
+):
+ extra_args = {} if extra_args is None else extra_args
+ s_in = x.new_ones([x.shape[0]])
+
+ for i in trange(len(sigmas) - 1, disable=disable):
+ gamma = max(s_churn / (len(sigmas) - 1), 2**0.5 - 1) if s_tmin <= sigmas[i] <= s_tmax else 0.0
+ eps = torch.randn_like(x) * s_noise
+ sigma_hat = sigmas[i] * (gamma + 1)
+ dt = sigmas[i + 1] - sigma_hat
+
+ if gamma > 0:
+ x = x - eps * (sigma_hat**2 - sigmas[i] ** 2) ** 0.5
+
+ denoised = model(x, sigma_hat * s_in, **extra_args)
+ d = to_d(x, sigma_hat, denoised)
+
+ if sigmas[i + 1] > 0:
+ if i // 2 == 1:
+ x = dy_sampling_step(x, model, dt, sigma_hat, **extra_args)
+
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigma_hat, "denoised": denoised})
+
+ # Euler method
+ x = x + d * dt
+
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/euler_dy_negative.py b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_dy_negative.py
new file mode 100644
index 0000000000000000000000000000000000000000..cba3eb4368e7edaeb20b86b6cae6798d42f15943
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_dy_negative.py
@@ -0,0 +1,50 @@
+import torch
+
+from k_diffusion.sampling import to_d
+
+from tqdm.auto import trange
+
+from lib_es.utils import dy_sampling_step
+from lib_es.utils import sampler_metadata
+
+
+@sampler_metadata("Euler Dy Negative")
+@torch.no_grad()
+def sample_euler_dy_negative(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ s_noise=1.0,
+):
+ extra_args = {} if extra_args is None else extra_args
+ s_in = x.new_ones([x.shape[0]])
+
+ for i in trange(len(sigmas) - 1, disable=disable):
+ gamma = max(s_churn / (len(sigmas) - 1), 2**0.5 - 1) if s_tmin <= sigmas[i] <= s_tmax else 0.0
+ eps = torch.randn_like(x) * s_noise
+ sigma_hat = sigmas[i] * (gamma + 1)
+ dt = sigmas[i + 1] - sigma_hat
+
+ if gamma > 0:
+ x = x - eps * (sigma_hat**2 - sigmas[i] ** 2) ** 0.5
+
+ denoised = model(x, sigma_hat * s_in, **extra_args)
+ d = to_d(x, sigma_hat, denoised)
+
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigma_hat, "denoised": denoised})
+
+ # Euler method
+ if sigmas[i + 1] > 0 and i // 2 == 1:
+ x = dy_sampling_step(x, model, dt, sigma_hat, **extra_args)
+ x = -x - d * dt
+ else:
+ x = x + d * dt
+
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/euler_max.py b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_max.py
new file mode 100644
index 0000000000000000000000000000000000000000..446c8ec87037300bdb956186b44fb32066b5d799
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_max.py
@@ -0,0 +1,45 @@
+import math
+import torch
+
+from k_diffusion.sampling import to_d
+
+from tqdm.auto import trange
+
+from lib_es.utils import sampler_metadata
+
+
+@sampler_metadata("Euler Max")
+@torch.no_grad()
+def sample_euler_max(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ s_noise=1.0,
+):
+ extra_args = {} if extra_args is None else extra_args
+ s_in = x.new_ones([x.shape[0]])
+ for i in trange(len(sigmas) - 1, disable=disable):
+ gamma = max(s_churn / (len(sigmas) - 1), 2**0.5 - 1) if s_tmin <= sigmas[i] <= s_tmax else 0.0
+ eps = torch.randn_like(x) * s_noise
+ sigma_hat = sigmas[i] * (gamma + 1)
+
+ if gamma > 0:
+ x = x - eps * (sigma_hat**2 - sigmas[i] ** 2) ** 0.5
+
+ denoised = model(x, sigma_hat * s_in, **extra_args)
+ d = to_d(x, sigma_hat, denoised)
+
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigma_hat, "denoised": denoised})
+
+ dt = sigmas[i + 1] - sigma_hat
+
+ # Euler method
+ x = x + (math.cos(i + 1) / (i + 1) + 1) * d * dt
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/euler_multipass.py b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_multipass.py
new file mode 100644
index 0000000000000000000000000000000000000000..3431a314127d27b6078bc6cf13d58caef4325816
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_multipass.py
@@ -0,0 +1,290 @@
+import torch
+from tqdm import trange
+
+from k_diffusion.sampling import get_ancestral_step, to_d
+
+from lib_es.utils import default_noise_sampler, extend_sigmas, sampler_metadata
+
+
+# ==============================================================================================================
+# - Originally written by aria1th: https://github.com/aria1th
+# - CFG++ support written by LaVie024: https://github.com/LaVie024
+# - Standard Euler support written by catboxanon: https://github.com/catboxanon
+# ==============================================================================================================
+
+
+def apply_churn(x, sub_sigma, s_churn, s_tmin, s_tmax, s_noise, pass_step):
+ if s_churn > 0:
+ gamma = min(s_churn / max(0, pass_step - 1), 2**0.5 - 1) if s_tmin <= sub_sigma < s_tmax else 0
+ sigma_hat = sub_sigma * (gamma + 1)
+ else:
+ gamma = 0
+ sigma_hat = sub_sigma
+
+ if gamma > 0:
+ eps = torch.randn_like(x) * s_noise
+ x = x + eps * (sigma_hat**2 - sub_sigma**2) ** 0.5
+
+ return x, sigma_hat
+
+
+@torch.no_grad()
+def euler_ancestral_multipass(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ eta=1.0,
+ s_noise=1.0,
+ noise_sampler=None,
+ pass_steps=2,
+ pass_sigma_max=float("inf"),
+ pass_sigma_min=12.0,
+ cfg_pp=False,
+):
+ """
+ A multipass variant of Euler-Ancestral sampling.
+ - For each i in [0, len(sigmas)-2], we check if sigma_i is in [pass_sigma_min, pass_sigma_max].
+ If so, subdivide the step from sigma_i -> sigma_{i+1} into 'pass_steps' sub-steps.
+ Otherwise, do a single standard step.
+ - Each sub-step calls 'get_ancestral_step(...)' with the sub-interval's start & end sigmas,
+ then applies the usual Euler-Ancestral update:
+ x = x + d*dt + (noise * sigma_up)
+ """
+ extra_args = {} if extra_args is None else extra_args
+ seed = extra_args.get("seed", None)
+ noise_sampler = default_noise_sampler(x, seed=seed) if noise_sampler is None else noise_sampler
+ s_in = x.new_ones([x.shape[0]])
+
+ if cfg_pp:
+ model.need_last_noise_uncond = True
+ model.inner_model.inner_model.forge_objects.unet.model_options["disable_cfg1_optimization"] = True
+
+ sub_sigmas = extend_sigmas(sigmas, pass_steps, pass_sigma_max, pass_sigma_min)
+
+ for i in trange(len(sub_sigmas) - 1, disable=disable):
+ # Current sub-step range:
+ sub_sigma_curr = sub_sigmas[i]
+ sub_sigma_next = sub_sigmas[i + 1]
+
+ # Denoise at the current sub-sigma
+ denoised = model(x, sub_sigma_curr * s_in, **extra_args)
+
+ if callback is not None:
+ callback({"x": x, "i": i, "sub_step": i, "sigma": sub_sigma_curr, "denoised": denoised})
+
+ # Compute the ancestral step parameters for this sub-interval
+ sigma_down, sigma_up = get_ancestral_step(sub_sigma_curr, sub_sigma_next, eta=eta)
+
+ d = model.last_noise_uncond if cfg_pp else to_d(x, sub_sigma_curr, denoised)
+
+ if cfg_pp:
+ x = denoised + d * sigma_down
+ elif sigma_down == 0.0:
+ x = denoised
+ else:
+ x = x + d * (sigma_down - sub_sigma_curr)
+
+ if sigma_up != 0.0:
+ # Add noise for the "ancestral" part
+ x = x + noise_sampler(sub_sigma_curr, sub_sigma_next) * (s_noise * sigma_up)
+
+ return x
+
+
+@sampler_metadata(name="Euler a Multipass", extra_params={"uses_ensd": True})
+def sample_euler_ancestral_multipass(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ eta=1.0,
+ s_noise=1.0,
+ noise_sampler=None,
+ pass_steps=2,
+ pass_sigma_max=float("inf"),
+ pass_sigma_min=12.0,
+):
+ return euler_ancestral_multipass(
+ model,
+ x,
+ sigmas,
+ extra_args,
+ callback,
+ disable,
+ eta,
+ s_noise,
+ noise_sampler,
+ pass_steps,
+ pass_sigma_max,
+ pass_sigma_min,
+ False,
+ )
+
+
+@sampler_metadata(name="Euler a Multipass CFG++", extra_params={"uses_ensd": True})
+def sample_euler_ancestral_multipass_cfg_pp(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ eta=1.0,
+ s_noise=1.0,
+ noise_sampler=None,
+ pass_steps=2,
+ pass_sigma_max=float("inf"),
+ pass_sigma_min=12.0,
+):
+ return euler_ancestral_multipass(
+ model,
+ x,
+ sigmas,
+ extra_args,
+ callback,
+ disable,
+ eta,
+ s_noise,
+ noise_sampler,
+ pass_steps,
+ pass_sigma_max,
+ pass_sigma_min,
+ True,
+ )
+
+
+@torch.no_grad()
+def euler_multipass(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ noise_sampler=None,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ s_noise=1.0,
+ pass_steps=2,
+ pass_sigma_max=float("inf"),
+ pass_sigma_min=12.0,
+ cfg_pp=False,
+):
+ """
+ A multipass variant of Euler sampling.
+ """
+ extra_args = {} if extra_args is None else extra_args
+ seed = extra_args.get("seed", None)
+ noise_sampler = default_noise_sampler(x, seed=seed) if noise_sampler is None else noise_sampler
+
+ if cfg_pp:
+ model.need_last_noise_uncond = True
+ model.inner_model.inner_model.forge_objects.unet.model_options["disable_cfg1_optimization"] = True
+
+ s_in = x.new_ones([x.shape[0]])
+ sub_sigmas = extend_sigmas(sigmas, pass_steps, pass_sigma_max, pass_sigma_min)
+
+ for i in trange(len(sub_sigmas) - 1, disable=disable):
+ # Current sub-step range:
+ sub_sigma_curr = sub_sigmas[i]
+ sub_sigma_next = sub_sigmas[i + 1]
+
+ x, sigma_hat = apply_churn(x, sub_sigma_curr, s_churn, s_tmin, s_tmax, s_noise, pass_steps)
+
+ # Denoise at the current sub-sigma
+ denoised = model(x, sub_sigma_curr * s_in, **extra_args)
+
+ if callback is not None:
+ callback(
+ {
+ "x": x,
+ "i": i,
+ "sub_step": i,
+ "sigma": sub_sigma_curr,
+ "sigma_hat": sigma_hat,
+ "denoised": denoised,
+ }
+ )
+
+ d = model.last_noise_uncond if cfg_pp else to_d(x, sigma_hat, denoised)
+ x = denoised + d * sub_sigma_next if cfg_pp else x + d * (sub_sigma_next - sigma_hat)
+
+ return x
+
+
+@sampler_metadata(name="Euler Multipass")
+def sample_euler_multipass(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_noise=1.0,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ noise_sampler=None,
+ pass_steps=2,
+ pass_sigma_max=float("inf"),
+ pass_sigma_min=12.0,
+):
+ return euler_multipass(
+ model,
+ x,
+ sigmas,
+ extra_args,
+ callback,
+ disable,
+ noise_sampler,
+ s_churn,
+ s_tmin,
+ s_tmax,
+ s_noise,
+ pass_steps,
+ pass_sigma_max,
+ pass_sigma_min,
+ False,
+ )
+
+
+@sampler_metadata(name="Euler Multipass CFG++")
+def sample_euler_multipass_cfg_pp(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_noise=1.0,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ noise_sampler=None,
+ pass_steps=2,
+ pass_sigma_max=float("inf"),
+ pass_sigma_min=12.0,
+):
+ return euler_multipass(
+ model,
+ x,
+ sigmas,
+ extra_args,
+ callback,
+ disable,
+ noise_sampler,
+ s_churn,
+ s_tmin,
+ s_tmax,
+ s_noise,
+ pass_steps,
+ pass_sigma_max,
+ pass_sigma_min,
+ True,
+ )
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/euler_negative.py b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_negative.py
new file mode 100644
index 0000000000000000000000000000000000000000..fb06e85feb5b2ad05dd6a3f435d25bb208886ac1
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_negative.py
@@ -0,0 +1,48 @@
+import torch
+
+from k_diffusion.sampling import to_d
+
+from tqdm.auto import trange
+
+from lib_es.utils import sampler_metadata
+
+
+@sampler_metadata("Euler Negative")
+@torch.no_grad()
+def sample_euler_negative(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ s_noise=1.0,
+):
+ extra_args = {} if extra_args is None else extra_args
+ s_in = x.new_ones([x.shape[0]])
+
+ for i in trange(len(sigmas) - 1, disable=disable):
+ gamma = max(s_churn / (len(sigmas) - 1), 2**0.5 - 1) if s_tmin <= sigmas[i] <= s_tmax else 0.0
+ eps = torch.randn_like(x) * s_noise
+ sigma_hat = sigmas[i] * (gamma + 1)
+ dt = sigmas[i + 1] - sigma_hat
+
+ if gamma > 0:
+ x = x - eps * (sigma_hat**2 - sigmas[i] ** 2) ** 0.5
+
+ denoised = model(x, sigma_hat * s_in, **extra_args)
+ d = to_d(x, sigma_hat, denoised)
+
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigma_hat, "denoised": denoised})
+
+ # Euler method
+ if sigmas[i + 1] > 0 and i // 2 == 1:
+ x = -x - d * dt
+ else:
+ x = x + d * dt
+
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/euler_smea.py b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_smea.py
new file mode 100644
index 0000000000000000000000000000000000000000..bbd7d829d2b3f319290a767c9abd663aa1584552
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_smea.py
@@ -0,0 +1,49 @@
+import torch
+
+from k_diffusion.sampling import to_d
+
+from tqdm.auto import trange
+
+from lib_es.utils import overall_sampling_step
+from lib_es.utils import sampler_metadata
+
+
+@sampler_metadata("Euler SMEA")
+@torch.no_grad()
+def sample_euler_smea(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ s_noise=1.0,
+):
+ extra_args = {} if extra_args is None else extra_args
+ s_in = x.new_ones([x.shape[0]])
+
+ for i in trange(len(sigmas) - 1, disable=disable):
+ gamma = max(s_churn / (len(sigmas) - 1), 2**0.5 - 1) if s_tmin <= sigmas[i] <= s_tmax else 0.0
+ eps = torch.randn_like(x) * s_noise
+ sigma_hat = sigmas[i] * (gamma + 1)
+ dt = sigmas[i + 1] - sigma_hat
+
+ if i // 2 == 1:
+ x = overall_sampling_step(x, model, dt, sigma_hat, **extra_args)
+
+ if gamma > 0:
+ x = x - eps * (sigma_hat**2 - sigmas[i] ** 2) ** 0.5
+
+ denoised = model(x, sigma_hat * s_in, **extra_args)
+ d = to_d(x, sigma_hat, denoised)
+
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigma_hat, "denoised": denoised})
+
+ # Euler method
+ x = x + d * dt
+
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/euler_smea_dy.py b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_smea_dy.py
new file mode 100644
index 0000000000000000000000000000000000000000..3fd210ba28ef19d1bc37815302fbf86c37f0e726
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_smea_dy.py
@@ -0,0 +1,53 @@
+import torch
+
+from k_diffusion.sampling import to_d
+
+from tqdm.auto import trange
+
+from lib_es.utils import dy_sampling_step, smea_sampling_step
+from lib_es.utils import sampler_metadata
+
+
+@sampler_metadata("Euler SMEA Dy")
+@torch.no_grad()
+def sample_euler_smea_dy(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ s_noise=1.0,
+):
+ extra_args = {} if extra_args is None else extra_args
+ s_in = x.new_ones([x.shape[0]])
+
+ for i in trange(len(sigmas) - 1, disable=disable):
+ gamma = max(s_churn / (len(sigmas) - 1), 2**0.5 - 1) if s_tmin <= sigmas[i] <= s_tmax else 0.0
+ eps = torch.randn_like(x) * s_noise
+ sigma_hat = sigmas[i] * (gamma + 1)
+ dt = sigmas[i + 1] - sigma_hat
+
+ if gamma > 0:
+ x = x - eps * (sigma_hat**2 - sigmas[i] ** 2) ** 0.5
+
+ denoised = model(x, sigma_hat * s_in, **extra_args)
+ d = to_d(x, sigma_hat, denoised)
+
+ # Euler method
+ x = x + d * dt
+
+ if sigmas[i + 1] > 0:
+ if i + 1 // 2 == 1:
+ x = dy_sampling_step(x, model, dt, sigma_hat, **extra_args)
+
+ if i + 1 // 2 == 0:
+ x = smea_sampling_step(x, model, dt, sigma_hat, **extra_args)
+
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigma_hat, "denoised": denoised})
+
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/euler_smea_dy_negative.py b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_smea_dy_negative.py
new file mode 100644
index 0000000000000000000000000000000000000000..0511a5f9be32a0973ac9c2924c206f7503e04fb3
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/euler_smea_dy_negative.py
@@ -0,0 +1,55 @@
+import torch
+
+from k_diffusion.sampling import to_d
+
+from tqdm.auto import trange
+
+from lib_es.utils import dy_sampling_step, smea_sampling_step
+from lib_es.utils import sampler_metadata
+
+
+@sampler_metadata("Euler SMEA Dy Negative")
+@torch.no_grad()
+def sample_euler_smea_dy_negative(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ s_noise=1.0,
+):
+ extra_args = {} if extra_args is None else extra_args
+ s_in = x.new_ones([x.shape[0]])
+
+ for i in trange(len(sigmas) - 1, disable=disable):
+ gamma = max(s_churn / (len(sigmas) - 1), 2**0.5 - 1) if s_tmin <= sigmas[i] <= s_tmax else 0.0
+ eps = torch.randn_like(x) * s_noise
+ sigma_hat = sigmas[i] * (gamma + 1)
+ dt = sigmas[i + 1] - sigma_hat
+
+ if gamma > 0:
+ x = x - eps * (sigma_hat**2 - sigmas[i] ** 2) ** 0.5
+
+ denoised = model(x, sigma_hat * s_in, **extra_args)
+ d = to_d(x, sigma_hat, denoised)
+
+ # Euler method
+ x = x + d * dt
+
+ if sigmas[i + 1] > 0:
+ if i + 1 // 2 == 1:
+ x = dy_sampling_step(x, model, dt, sigma_hat, **extra_args)
+ x = -x - d * dt
+
+ if i + 1 // 2 == 0:
+ x = smea_sampling_step(x, model, dt, sigma_hat, **extra_args)
+ x = -x - d * dt
+
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigma_hat, "denoised": denoised})
+
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/extended_reverse_time.py b/sd-forge-extra-samplers/lib_es/extra_samplers/extended_reverse_time.py
new file mode 100644
index 0000000000000000000000000000000000000000..537624b2fe0e6512e11641637c84d628e56ee97f
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/extended_reverse_time.py
@@ -0,0 +1,83 @@
+import torch
+from tqdm import trange
+
+import lib_es.const as consts
+from lib_es.utils import default_noise_sampler, sampler_metadata
+
+
+# From ComfyUI
+@sampler_metadata(
+ "Extended Reverse-Time SDE",
+ {"uses_ensd": True, "scheduler": "sgm_uniform"},
+ ["sample_er_sde, extended_reverse_sde"],
+)
+@torch.no_grad()
+def sample_er_sde(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_noise=1.0,
+ noise_sampler=None,
+ noise_scaler=None,
+):
+ """
+ Extended Reverse-Time SDE solver (VE ER-SDE-Solver-3). Arxiv: https://arxiv.org/abs/2309.06169.
+ Code reference: https://github.com/QinpengCui/ER-SDE-Solver/blob/main/er_sde_solver.py.
+ """
+ extra_args = {} if extra_args is None else extra_args
+ seed = extra_args.get("seed", None)
+ noise_sampler = default_noise_sampler(x, seed=seed) if noise_sampler is None else noise_sampler
+ s_in = x.new_ones([x.shape[0]])
+
+ max_stage: int = getattr(model.p, consts.ER_MAX_STAGE, 3)
+
+ def default_noise_scaler(sigma):
+ return sigma * ((sigma**0.3).exp() + 10.0)
+
+ noise_scaler = default_noise_scaler if noise_scaler is None else noise_scaler
+ num_integration_points = 200.0
+ point_indice = torch.arange(0, num_integration_points, dtype=torch.float32, device=x.device)
+
+ old_denoised = None
+ old_denoised_d = None
+
+ for i in trange(len(sigmas) - 1, disable=disable):
+ denoised = model(x, sigmas[i] * s_in, **extra_args)
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigmas[i], "denoised": denoised})
+ stage_used = min(max_stage, i + 1)
+ if sigmas[i + 1] == 0:
+ x = denoised
+ elif stage_used == 1:
+ r = noise_scaler(sigmas[i + 1]) / noise_scaler(sigmas[i])
+ x = r * x + (1 - r) * denoised
+ else:
+ r = noise_scaler(sigmas[i + 1]) / noise_scaler(sigmas[i])
+ x = r * x + (1 - r) * denoised
+
+ dt = sigmas[i + 1] - sigmas[i]
+ sigma_step_size = -dt / num_integration_points
+ sigma_pos = sigmas[i + 1] + point_indice * sigma_step_size
+ scaled_pos = noise_scaler(sigma_pos)
+
+ # Stage 2
+ s = torch.sum(1 / scaled_pos) * sigma_step_size
+ denoised_d = (denoised - old_denoised) / (sigmas[i] - sigmas[i - 1])
+ x = x + (dt + s * noise_scaler(sigmas[i + 1])) * denoised_d
+
+ if stage_used >= 3:
+ # Stage 3
+ s_u = torch.sum((sigma_pos - sigmas[i]) / scaled_pos) * sigma_step_size
+ denoised_u = (denoised_d - old_denoised_d) / ((sigmas[i] - sigmas[i - 2]) / 2)
+ x = x + ((dt**2) / 2 + s_u * noise_scaler(sigmas[i + 1])) * denoised_u
+ old_denoised_d = denoised_d
+
+ if s_noise != 0 and sigmas[i + 1] > 0:
+ x = x + noise_sampler(sigmas[i], sigmas[i + 1]) * s_noise * (
+ sigmas[i + 1] ** 2 - sigmas[i] ** 2 * r**2
+ ).sqrt().nan_to_num(nan=0.0)
+ old_denoised = denoised
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/gradient_estimation.py b/sd-forge-extra-samplers/lib_es/extra_samplers/gradient_estimation.py
new file mode 100644
index 0000000000000000000000000000000000000000..f30cd94f39f5c7b272489dfa94f51462ddae456c
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/gradient_estimation.py
@@ -0,0 +1,180 @@
+from collections.abc import Callable
+from typing import Any, Optional
+import torch
+from tqdm import trange
+
+from k_diffusion.sampling import to_d
+from modules import errors
+
+import lib_es.const as consts
+from lib_es.utils import sampler_metadata
+
+
+def compute_optimal_gamma(steps: int, adaptive: bool = True) -> float:
+ """
+ Compute the optimal gamma parameter for gradient estimation based on step count.
+
+ Args:
+ steps: Number of sampling steps
+ adaptive: Whether to use adaptive gamma based on step count
+
+ Returns:
+ Optimal gamma value
+ """
+ if not adaptive:
+ return consts.GE_DEFAULT_GAMMA
+
+ # Define min and max values
+ min_steps, max_steps = 10, 100
+ min_gamma, max_gamma = 1.5, 2.6
+
+ # Handle edge cases
+ if steps <= min_steps:
+ return min_gamma
+ elif steps >= max_steps:
+ return max_gamma
+
+ # Apply logarithmic scaling
+ # log(steps/min_steps) / log(max_steps/min_steps) gives a value from 0 to 1
+ # that increases logarithmically with steps
+ log_factor = torch.log(torch.tensor(steps / min_steps)) / torch.log(torch.tensor(max_steps / min_steps))
+
+ # Convert the logarithmic factor to gamma value
+ gamma = min_gamma + log_factor * (max_gamma - min_gamma)
+
+ return float(gamma)
+
+
+def validate_schedule(sigmas: torch.Tensor, eta: float = 0.1, nu: float = 2.0) -> bool:
+ """
+ Validate whether a noise schedule satisfies the admissibility criteria from the paper.
+
+ Args:
+ sigmas: Tensor of noise levels in descending order
+ eta: Error parameter
+ nu: Accuracy parameter for distance estimates
+
+ Returns:
+ True if schedule is admissible, False otherwise
+ """
+ n = len(sigmas) - 1
+ is_admissible = True
+ issues = []
+
+ # Check if sigmas are strictly decreasing
+ if not torch.all(sigmas[:-1] > sigmas[1:]):
+ is_admissible = False
+ issues.append("Sigmas must be strictly decreasing")
+
+ # Calculate the maximum allowable beta
+ c = 1 - nu ** (-1 / n)
+ beta_max = c / (eta + c)
+
+ # Check that step sizes respect the admissibility criteria
+ for i in range(n - 1):
+ ratio = sigmas[i + 1] / sigmas[i]
+ beta = 1 - ratio
+ if beta > beta_max:
+ is_admissible = False
+ issues.append(f"Step {i} has beta {beta:.4f} > beta_max {beta_max:.4f}")
+
+ if not is_admissible:
+ errors.display(ValueError(f"Noise schedule is not admissible: {', '.join(issues)}"))
+ errors.print_error_explanation("Noise schedule validation failed.\n\tIssues:" + ",\n\t\t".join(issues))
+
+ return is_admissible
+
+
+@torch.no_grad()
+@sampler_metadata("Gradient Estimation", {"scheduler": "sgm_uniform"})
+def sample_gradient_estimation(
+ model,
+ x: torch.Tensor,
+ sigmas: torch.Tensor,
+ extra_args: Optional[dict[str, Any]] = None,
+ callback: Optional[Callable] = None,
+ disable: Optional[bool] = None,
+ validate_sigmas: bool = False,
+ eta: float = 0.1,
+ nu: float = 2.0,
+) -> torch.Tensor:
+ """
+ Gradient-estimation sampler as described in "Interpreting and Improving Diffusion Models from an Optimization Perspective".
+
+ This sampler implements a second-order method that improves upon DDIM by using a combination of current and previous
+ gradients to reduce gradient estimation error. It is based on the insight that denoising is approximately equivalent to
+ projection onto the data manifold, and diffusion sampling is gradient descent on the squared Euclidean distance function.
+
+ Args:
+ model: The diffusion model
+ x: Input tensor
+ sigmas: Noise schedule (should be in descending order)
+ extra_args: Extra arguments to pass to the model
+ callback: Callback function
+ disable: Whether to disable the progress bar
+ validate_sigmas: Whether to validate the noise schedule
+ eta: Error parameter for schedule validation (default 0.1)
+ nu: Accuracy parameter for schedule validation (default 2.0)
+
+ Returns:
+ Denoised tensor
+
+ References:
+ Paper: https://openreview.net/pdf?id=o2ND9v0CeK
+ """
+ # Parameter validation and initialization
+ if sigmas.shape[0] < 2:
+ raise ValueError("Need at least 2 timesteps for gradient estimation")
+
+ extra_args = {} if extra_args is None else extra_args
+ s_in = x.new_ones([x.shape[0]])
+ old_d = None
+ steps = len(sigmas) - 1
+
+ # Schedule validation
+ if validate_sigmas:
+ validate_schedule(sigmas, eta, nu)
+
+ # Get gamma from model properties or compute optimal value
+ use_adaptive_steps: bool = getattr(model.p, consts.GE_USE_ADAPTIVE_STEPS, True)
+ if use_adaptive_steps:
+ # Compute optimal gamma based on the number of steps
+ # and add the offset if specified
+ ge_gamma = compute_optimal_gamma(steps, use_adaptive_steps) + getattr(
+ model.p, consts.GE_GAMMA_OFFSET, consts.GE_DEFAULT_GAMMA_OFFSET
+ )
+ else:
+ ge_gamma = getattr(model.p, consts.GE_GAMMA, consts.GE_DEFAULT_GAMMA)
+
+ # Initialize timestep-adaptive gamma values if needed
+ timestep_adaptive_gamma = getattr(model.p, consts.GE_USE_TIMESTEP_ADAPTIVE_GAMMA, False)
+
+ if timestep_adaptive_gamma:
+ # Higher gamma at the beginning, lower toward the end
+ # This is a heuristic based on the observation that early steps benefit more
+ # from aggressive gradient correction
+ gammas = torch.linspace(ge_gamma * 1.2, ge_gamma * 0.8, steps)
+
+ # Main sampling loop
+ for i in trange(len(sigmas) - 1, disable=disable):
+ denoised = model(x, sigmas[i] * s_in, **extra_args)
+ d = to_d(x, sigmas[i], denoised)
+
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigmas[i], "denoised": denoised})
+
+ dt = sigmas[i + 1] - sigmas[i]
+
+ if i == 0:
+ # Euler method for first step
+ x = x + d * dt
+ else:
+ # Gradient estimation
+ current_gamma = gammas[i].item() if timestep_adaptive_gamma else ge_gamma
+
+ d_bar = current_gamma * d + (1 - current_gamma) * old_d
+ x = x + d_bar * dt
+
+ old_d = d
+
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/heun_ancestral.py b/sd-forge-extra-samplers/lib_es/extra_samplers/heun_ancestral.py
new file mode 100644
index 0000000000000000000000000000000000000000..e45d835888ee9de370fa5b0e87aeb5ef6bf10388
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/heun_ancestral.py
@@ -0,0 +1,81 @@
+import torch
+from tqdm.auto import trange
+from k_diffusion.sampling import default_noise_sampler, get_ancestral_step, to_d
+
+from lib_es.utils import sampler_metadata
+
+
+@sampler_metadata(
+ "Heun Ancestral",
+ {"uses_ensd": True},
+)
+@torch.no_grad()
+def sample_heun_ancestral(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ eta=1.0,
+ s_noise=1.0,
+ noise_sampler=None,
+):
+ """
+ Ancestral sampling with Heun's method steps.
+
+ Args:
+ model: The model to sample from.
+ x: The initial noise.
+ sigmas: The noise levels to sample at.
+ extra_args: Extra arguments to the model.
+ callback: A function that's called after each step.
+ disable: Disable tqdm progress bar.
+ eta: Ancestral sampling strength parameter.
+ s_noise: Noise scale.
+ noise_sampler: A function that returns noise.
+ """
+ extra_args = {} if extra_args is None else extra_args
+ noise_sampler = default_noise_sampler(x) if noise_sampler is None else noise_sampler
+ s_in = x.new_ones([x.shape[0]])
+
+ for i in trange(len(sigmas) - 1, disable=disable):
+ # Get current and next sigma
+ sigma = sigmas[i]
+
+ # Run denoising model
+ denoised = model(x, sigma * s_in, **extra_args)
+
+ # Calculate ancestral step parameters
+ sigma_down, sigma_up = get_ancestral_step(sigma, sigmas[i + 1], eta=eta)
+
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigma, "sigma_hat": sigma, "denoised": denoised})
+
+ # Calculate the derivative
+ d = to_d(x, sigma, denoised)
+
+ # Determine step size
+ dt = sigma_down - sigma
+
+ if sigma_down == 0:
+ # For the last step, use Euler method for stability
+ x = x + d * dt
+ else:
+ # Heun's method (predictor-corrector)
+ # 1. Predictor step (Euler)
+ x_2 = x + d * dt
+
+ # 2. Evaluate at the predicted point
+ denoised_2 = model(x_2, sigma_down * s_in, **extra_args)
+ d_2 = to_d(x_2, sigma_down, denoised_2)
+
+ # 3. Corrector step (average of gradients)
+ d_prime = (d + d_2) / 2
+ x = x + d_prime * dt
+
+ # Add noise according to ancestral sampling formula
+ if sigma_up > 0:
+ x = x + noise_sampler(sigma, sigmas[i + 1]) * s_noise * sigma_up
+
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/kohaku_lonyu_yog.py b/sd-forge-extra-samplers/lib_es/extra_samplers/kohaku_lonyu_yog.py
new file mode 100644
index 0000000000000000000000000000000000000000..63e5af6816e63fc3c79842063891c34db49b27c2
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/kohaku_lonyu_yog.py
@@ -0,0 +1,58 @@
+import torch
+
+from k_diffusion.sampling import default_noise_sampler, get_ancestral_step, to_d
+
+from tqdm.auto import trange
+
+from lib_es.utils import sampler_metadata
+
+
+@sampler_metadata("Kohaku LoNyu Yog")
+@torch.no_grad()
+def sample_kohaku_lonyu_yog(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ s_noise=1.0,
+ noise_sampler=None,
+ eta=1.0,
+):
+ """Kohaku_LoNyu_Yog"""
+ extra_args = {} if extra_args is None else extra_args
+ s_in = x.new_ones([x.shape[0]])
+ noise_sampler = default_noise_sampler(x) if noise_sampler is None else noise_sampler
+ for i in trange(len(sigmas) - 1, disable=disable):
+ gamma = min(s_churn / (len(sigmas) - 1), 2**0.5 - 1) if s_tmin <= sigmas[i] <= s_tmax else 0.0
+ eps = torch.randn_like(x) * s_noise
+ sigma_hat = sigmas[i] * (gamma + 1)
+ if gamma > 0:
+ x = x + eps * (sigma_hat**2 - sigmas[i] ** 2) ** 0.5
+ denoised = model(x, sigma_hat * s_in, **extra_args)
+ d = to_d(x, sigma_hat, denoised)
+ sigma_down, sigma_up = get_ancestral_step(sigmas[i], sigmas[i + 1], eta=eta)
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigma_hat, "denoised": denoised})
+ dt = sigma_down - sigmas[i]
+
+ if i <= (len(sigmas) - 1) / 2:
+ x2 = -x
+ denoised2 = model(x2, sigma_hat * s_in, **extra_args)
+ d2 = to_d(x2, sigma_hat, denoised2)
+
+ x3 = x + ((d + d2) / 2) * dt
+ denoised3 = model(x3, sigma_hat * s_in, **extra_args)
+ d3 = to_d(x3, sigma_hat, denoised3)
+
+ real_d = (d + d3) / 2
+ x = x + real_d * dt
+
+ x = x + noise_sampler(sigmas[i], sigmas[i + 1]) * s_noise * sigma_up
+ else:
+ x = x + d * dt
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/langevin_euler.py b/sd-forge-extra-samplers/lib_es/extra_samplers/langevin_euler.py
new file mode 100644
index 0000000000000000000000000000000000000000..89fa9b3fa5258f9784d23a9791684eececa0030b
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/langevin_euler.py
@@ -0,0 +1,89 @@
+import torch
+from tqdm.auto import trange
+from k_diffusion.sampling import default_noise_sampler, to_d
+
+import lib_es.const as consts
+from lib_es.utils import sampler_metadata
+
+
+@sampler_metadata(
+ "Langevin Euler",
+ {"scheduler": "sgm_uniform"},
+)
+@torch.no_grad()
+def sample_langevin_euler(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_churn=0.0,
+ s_tmin=0.0,
+ s_tmax=float("inf"),
+ s_noise=1.0,
+ noise_sampler=None,
+):
+ """
+ Langevin dynamics sampler - the adaptive CFG is now handled by the CFG function.
+ This is your original implementation but with the adaptive CFG logic removed.
+ """
+ extra_args = {} if extra_args is None else extra_args
+ noise_sampler = default_noise_sampler(x) if noise_sampler is None else noise_sampler
+ s_in = x.new_ones([x.shape[0]])
+
+ # Store original shape for aspect ratio calculations
+ height, width = x.shape[2:4]
+ aspect_ratio = width / height
+ sigma_max = sigmas[0]
+
+ langevin_strength = getattr(model.p, consts.LANGEVIN_STRENGTH, 0.1)
+
+ for i in trange(len(sigmas) - 1, disable=disable):
+ # Apply s_churn noise if requested
+ gamma = min(s_churn / (len(sigmas) - 1), 2**0.5 - 1) if s_tmin <= sigmas[i] <= s_tmax else 0.0
+ eps = torch.randn_like(x) * s_noise
+ sigma_hat = sigmas[i] * (gamma + 1)
+ if gamma > 0:
+ x = x + eps * (sigma_hat**2 - sigmas[i] ** 2) ** 0.5
+
+ # Perform model prediction - CFG is now handled by our function
+ denoised = model(x, sigma_hat * s_in, **extra_args)
+
+ # Call the callback
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigma_hat, "denoised": denoised})
+
+ # Calculate the derivative
+ d = to_d(x, sigma_hat, denoised)
+
+ # Langevin step: Deterministic part + Noise part
+ dt = sigmas[i + 1] - sigma_hat
+
+ # Deterministic Euler step
+ x = x + d * dt
+
+ # Apply Langevin noise if not the final step
+ if sigmas[i + 1] > 0:
+ # Simpler Langevin noise logic with less aggressive scaling
+ # Use a constant base noise level with a gentle decay
+ base_noise_level = langevin_strength # Base level from parameter
+
+ # Gentle decay curve - more consistent noise across steps
+ # Sqrt provides a more gradual decrease than linear scaling
+ decay_factor = torch.sqrt(sigmas[i + 1] / sigma_max)
+ noise_scale = base_noise_level * (0.1 + 0.9 * decay_factor)
+
+ # Higher safety clamp to allow more noise influence
+ noise_scale = max(langevin_strength * 0.05, min(noise_scale, 0.8))
+
+ # Generate balanced noise
+ noise = torch.randn_like(x) * noise_scale
+ height_scale = torch.sqrt(torch.tensor(aspect_ratio))
+ width_scale = 1.0 / height_scale
+ scaling = torch.tensor([1.0, 1.0, height_scale, width_scale]).reshape(1, -1, 1, 1).to(x.device)
+ balanced_noise = noise * scaling
+
+ x = x + balanced_noise
+
+ return x
diff --git a/sd-forge-extra-samplers/lib_es/extra_samplers/res_multistep.py b/sd-forge-extra-samplers/lib_es/extra_samplers/res_multistep.py
new file mode 100644
index 0000000000000000000000000000000000000000..78b8dfa94cd5d80f41c743745684f107ca848783
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_samplers/res_multistep.py
@@ -0,0 +1,235 @@
+import torch
+from tqdm.auto import trange
+
+#from backend.modules.k_diffusion_extra import default_noise_sampler
+#from backend.patcher.unet import UnetPatcher
+from k_diffusion.sampling import get_ancestral_step, to_d
+
+from lib_es.utils import sampler_metadata
+
+
+def sigma_fn(t):
+ """
+ Computes the sigma function for a given tensor `t`.
+ The sigma function is defined as the exponential of the negation of `t`.
+ Args:
+ t (torch.Tensor): Input tensor.
+ Returns:
+ torch.Tensor: The result of applying the sigma function to `t`.
+ """
+
+ return t.neg().exp()
+
+
+def t_fn(sigma):
+ """
+ Computes the negative logarithm of the input tensor.
+ Args:
+ sigma (torch.Tensor): A tensor for which the negative logarithm is to be computed.
+ Returns:
+ torch.Tensor: A tensor containing the negative logarithm of the input tensor.
+ """
+
+ return sigma.log().neg()
+
+
+def phi1_fn(t):
+ """
+ Computes the function phi1(t) = (exp(t) - 1) / t using PyTorch's expm1 function.
+ Args:
+ t (torch.Tensor): Input tensor.
+ Returns:
+ torch.Tensor: The result of (exp(t) - 1) / t.
+ """
+
+ return torch.expm1(t) / t
+
+
+def phi2_fn(t):
+ """
+ Compute the value of the phi2 function.
+ The phi2 function is defined as (phi1_fn(t) - 1.0) / t, where phi1_fn is
+ another function that takes a single argument t.
+ Parameters:
+ t (float): The input value for the function.
+ Returns:
+ float: The computed value of the phi2 function.
+ """
+
+ return (phi1_fn(t) - 1.0) / t
+
+
+@torch.no_grad()
+def res_multistep(
+ model,
+ x,
+ sigmas,
+ extra_args=None,
+ callback=None,
+ disable=None,
+ s_noise=1.0,
+ noise_sampler=None,
+ eta=1.0,
+ cfg_pp=False,
+):
+ """
+ Perform multi-step denoising using a conditional denoising model.
+ Args:
+ model (CFGDenoiserKDiffusion): The denoising model to use.
+ x (torch.Tensor): The input tensor to be denoised.
+ sigmas (list or torch.Tensor): A list or tensor of sigma values for each step.
+ extra_args (dict, optional): Additional arguments to pass to the model. Defaults to None.
+ callback (callable, optional): A callback function to be called after each step. Defaults to None.
+ disable (bool, optional): If True, disables the progress bar. Defaults to None.
+ s_noise (float, optional): Noise scale for stochasticity. Defaults to 1.0.
+ noise_sampler (callable, optional): Function to sample noise. Defaults to None.
+ cfg_pp (bool, optional): If True, enables post-processing for classifier-free guidance. Defaults to False.
+ Returns:
+ torch.Tensor: The denoised output tensor.
+ """
+ extra_args = {} if extra_args is None else extra_args
+ noise_sampler = default_noise_sampler(x) if noise_sampler is None else noise_sampler
+ s_in = x.new_ones([x.shape[0]])
+
+ old_denoised = None
+ uncond_denoised = None
+
+ # unconditional denoised is used for the second order multistep method
+ def post_cfg_function(args):
+ nonlocal uncond_denoised
+ uncond_denoised = args["uncond_denoised"]
+ return args["denoised"]
+
+ if cfg_pp:
+ model.need_last_noise_uncond = True
+ unet_patcher: UnetPatcher = model.inner_model.inner_model.forge_objects.unet
+ unet_patcher.model_options["disable_cfg1_optimization"] = True # not sure if this really works
+ unet_patcher.set_model_sampler_post_cfg_function(post_cfg_function)
+
+ for i in trange(len(sigmas) - 1, disable=disable):
+ denoised = model(x, sigmas[i] * s_in, **extra_args)
+ sigma_down, sigma_up = get_ancestral_step(sigmas[i], sigmas[i + 1], eta=eta)
+ if callback is not None:
+ callback({"x": x, "i": i, "sigma": sigmas[i], "sigma_hat": sigmas[i], "denoised": denoised})
+ if sigma_down == 0 or old_denoised is None:
+ # Euler method
+ if cfg_pp:
+ d = to_d(x, sigmas[i], uncond_denoised)
+ x = denoised + d * sigma_down
+ else:
+ d = to_d(x, sigmas[i], denoised)
+ dt = sigma_down - sigmas[i]
+ x = x + d * dt
+ else:
+ # Second order multistep method in https://arxiv.org/pdf/2308.02157
+ t, t_next, t_prev = t_fn(sigmas[i]), t_fn(sigma_down), t_fn(sigmas[i - 1])
+ h = t_next - t
+ c2 = (t_prev - t) / h
+
+ phi1_val, phi2_val = phi1_fn(-h), phi2_fn(-h)
+ b1 = torch.nan_to_num(phi1_val - phi2_val / c2, nan=0.0)
+ b2 = torch.nan_to_num(phi2_val / c2, nan=0.0)
+
+ if cfg_pp:
+ x = x + (denoised - uncond_denoised)
+ x = sigma_fn(h) * x + h * (b1 * uncond_denoised + b2 * old_denoised)
+ else:
+ x = sigma_fn(h) * x + h * (b1 * denoised + b2 * old_denoised)
+
+ # Noise addition
+ if sigmas[i + 1] > 0:
+ x = x + noise_sampler(sigmas[i], sigmas[i + 1]) * s_noise * sigma_up
+
+ if cfg_pp:
+ old_denoised = uncond_denoised
+ else:
+ old_denoised = denoised
+ return x
+
+
+@sampler_metadata(
+ "Res Multistep",
+ {"scheduler": "sgm_uniform"},
+)
+@torch.no_grad()
+def sample_res_multistep(
+ model, x, sigmas, extra_args=None, callback=None, disable=None, s_noise=1.0, noise_sampler=None
+):
+ return res_multistep(
+ model,
+ x,
+ sigmas,
+ extra_args=extra_args,
+ callback=callback,
+ disable=disable,
+ s_noise=s_noise,
+ noise_sampler=noise_sampler,
+ eta=0.0,
+ cfg_pp=False,
+ )
+
+
+@sampler_metadata(
+ "Res Multistep CFG++",
+ {"scheduler": "sgm_uniform"},
+)
+@torch.no_grad()
+def sample_res_multistep_cfg_pp(
+ model, x, sigmas, extra_args=None, callback=None, disable=None, s_noise=1.0, noise_sampler=None
+):
+ return res_multistep(
+ model,
+ x,
+ sigmas,
+ extra_args=extra_args,
+ callback=callback,
+ disable=disable,
+ s_noise=s_noise,
+ noise_sampler=noise_sampler,
+ eta=0.0,
+ cfg_pp=True,
+ )
+
+
+@sampler_metadata(
+ "Res Multistep Ancestral",
+ {"uses_ensd": True, "scheduler": "sgm_uniform"},
+)
+@torch.no_grad()
+def sample_res_multistep_ancestral(
+ model, x, sigmas, extra_args=None, callback=None, disable=None, eta=1.0, s_noise=1.0, noise_sampler=None
+):
+ return res_multistep(
+ model,
+ x,
+ sigmas,
+ extra_args=extra_args,
+ callback=callback,
+ disable=disable,
+ s_noise=s_noise,
+ noise_sampler=noise_sampler,
+ eta=eta,
+ cfg_pp=False,
+ )
+
+
+@sampler_metadata(
+ "Res Multistep Ancestral CFG++",
+ {"uses_ensd": True, "scheduler": "sgm_uniform"},
+)
+@torch.no_grad()
+def sample_res_multistep_ancestral_cfg_pp(
+ model, x, sigmas, extra_args=None, callback=None, disable=None, eta=1.0, s_noise=1.0, noise_sampler=None
+):
+ return res_multistep(
+ model,
+ x,
+ sigmas,
+ extra_args=extra_args,
+ callback=callback,
+ disable=disable,
+ s_noise=s_noise,
+ noise_sampler=noise_sampler,
+ eta=eta,
+ cfg_pp=True,
+ )
diff --git a/sd-forge-extra-samplers/lib_es/extra_schedulers/__init__.py b/sd-forge-extra-samplers/lib_es/extra_schedulers/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..b3406ed1b6bb5a21c639f7fb85eda4c4ec06c88b
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_schedulers/__init__.py
@@ -0,0 +1,6 @@
+from lib_es.extra_schedulers.linear_log import linear_log
+
+
+__all_schedulers__ = [
+ linear_log,
+]
diff --git a/sd-forge-extra-samplers/lib_es/extra_schedulers/__pycache__/__init__.cpython-310.pyc b/sd-forge-extra-samplers/lib_es/extra_schedulers/__pycache__/__init__.cpython-310.pyc
new file mode 100644
index 0000000000000000000000000000000000000000..bb5089529b5d7ccaca954d1b332eb1245cc0b8c3
Binary files /dev/null and b/sd-forge-extra-samplers/lib_es/extra_schedulers/__pycache__/__init__.cpython-310.pyc differ
diff --git a/sd-forge-extra-samplers/lib_es/extra_schedulers/__pycache__/linear_log.cpython-310.pyc b/sd-forge-extra-samplers/lib_es/extra_schedulers/__pycache__/linear_log.cpython-310.pyc
new file mode 100644
index 0000000000000000000000000000000000000000..ba4a128c430a20140c01592454314c52d53bb9d5
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diff --git a/sd-forge-extra-samplers/lib_es/extra_schedulers/linear_log.py b/sd-forge-extra-samplers/lib_es/extra_schedulers/linear_log.py
new file mode 100644
index 0000000000000000000000000000000000000000..6f52f161db9aa8d07ae6e74606ab454192df423f
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/extra_schedulers/linear_log.py
@@ -0,0 +1,63 @@
+import torch
+
+from lib_es.utils import scheduler_metadata
+
+
+@scheduler_metadata(name="linear_log", alias="Linear Log", need_inner_model=True)
+def linear_log(
+ n: int,
+ sigma_min: float,
+ sigma_max: float,
+ inner_model,
+ device: torch.device,
+ eta: float = 0.1,
+ nu: float = 2.0,
+ sgm: bool = False,
+ floor=False,
+ final_step_full: bool = True,
+) -> torch.Tensor:
+ """
+ Creates a log-linear (geometric) noise schedule as recommended in the paper.
+
+ Args:
+ n: Number of sampling steps
+ sigma_min: Minimum noise level
+ sigma_max: Maximum noise level
+ eta: Error parameter (default 0.1, as estimated in the paper for CIFAR-10)
+ nu: Accuracy parameter for distance estimates (default 2.0)
+ final_step_full: Whether to take a full step (β=1) for the final iteration
+
+ Returns:
+ A tensor of sigma values in descending order with a geometric progression.
+ """
+
+ # TODO: Add adjustable eta/nu parameters for more flexibility
+
+ # Calculate the maximum allowable beta based on the admissibility criteria
+ # β*,N = c/(η+c) where c = 1 - ν^(-1/N)
+ c = 1 - nu ** (-1 / n)
+ beta_max = c / (eta + c)
+
+ # Calculate the ratio that would give us exactly sigma_min from sigma_max in n steps
+ exact_ratio = (sigma_min / sigma_max) ** (1 / (n - 1))
+
+ # Use the smaller of the two to ensure admissibility
+ ratio = max(1 - beta_max, exact_ratio)
+
+ # Generate the geometric sequence
+ sigs = [sigma_max]
+ for i in range(1, n):
+ next_sigma = sigs[-1] * ratio
+
+ # For the final step, optionally set beta=1 (as recommended in the paper)
+ if final_step_full and i == n - 1:
+ next_sigma = sigma_min
+
+ sigs.append(next_sigma)
+
+ if not sgm:
+ # Add final value of 0.0
+ sigs.append(0.0)
+
+ # Convert to tensor
+ return torch.tensor(sigs)
diff --git a/sd-forge-extra-samplers/lib_es/samplers.py b/sd-forge-extra-samplers/lib_es/samplers.py
new file mode 100644
index 0000000000000000000000000000000000000000..b2de5d43c24580c5d95f7fce6b3db3afedcd2d1f
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/samplers.py
@@ -0,0 +1,57 @@
+from modules.sd_samplers import all_samplers
+from modules.sd_samplers_common import SamplerData
+from modules.sd_samplers_kdiffusion import KDiffusionSampler
+
+from lib_es.extra_samplers import __sampler_funcs__
+
+
+# See modules_forge/alter_samplers.py for the basis of this class and build_constructor function
+class ExtraSampler(KDiffusionSampler):
+ """
+ Overloads KDiffusionSampler to add extra parameters to the constructor
+ Based off lllyasviel's AlterSampler
+ """
+
+ def __init__(self, sd_model, sampler_name, sampler_func, options=None):
+ self.sampler_name = sampler_name
+ self.unet = sd_model.model.diffusion_model
+ sampler_function = sampler_func
+ super().__init__(sampler_function, sd_model, options)
+ self.extra_params = ["s_churn", "s_tmin", "s_tmax", "s_noise"]
+
+
+def build_constructor(sampler_name, sampler_func):
+ def constructor(m):
+ return ExtraSampler(m, sampler_name, sampler_func)
+
+ return constructor
+
+
+extra_sampler_list = [
+ (
+ fn.sampler_name,
+ fn,
+ fn.sampler_k_names,
+ fn.sampler_extra_params,
+ )
+ for fn in __sampler_funcs__
+]
+
+samplers_data_k_diffusion: list[SamplerData] = [
+ SamplerData(name, build_constructor(sampler_name=name, sampler_func=funcname), aliases, options)
+ for name, funcname, aliases, options in extra_sampler_list
+]
+
+
+def add_extra_samplers():
+ import modules.sd_samplers as sd_samplers
+
+ for sampler in samplers_data_k_diffusion:
+ if sampler.name not in sd_samplers.all_samplers_map:
+ sd_samplers.all_samplers.append(sampler)
+
+ sd_samplers.all_samplers_map = {x.name: x for x in sd_samplers.all_samplers}
+ sd_samplers.set_samplers()
+
+
+
diff --git a/sd-forge-extra-samplers/lib_es/schedulers.py b/sd-forge-extra-samplers/lib_es/schedulers.py
new file mode 100644
index 0000000000000000000000000000000000000000..43380930d5fedc67bdcda049c3c47ee73eb983b8
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/schedulers.py
@@ -0,0 +1,18 @@
+from lib_es.extra_schedulers import __all_schedulers__
+
+import modules.sd_schedulers as sched
+
+
+extra_scheduler_list = [
+ sched.Scheduler(fn.name, fn.alias, fn, need_inner_model=fn.need_inner_model) for fn in __all_schedulers__
+]
+
+
+def add_schedulers():
+ """
+ Add extra schedulers to the list of schedulers in the webui.
+ """
+ for scheduler in extra_scheduler_list:
+ if scheduler.name not in sched.schedulers_map:
+ sched.schedulers.append(scheduler)
+ sched.schedulers_map = {**{x.name: x for x in sched.schedulers}, **{x.label: x for x in sched.schedulers}}
diff --git a/sd-forge-extra-samplers/lib_es/utils.py b/sd-forge-extra-samplers/lib_es/utils.py
new file mode 100644
index 0000000000000000000000000000000000000000..fbd3bd830e36c5583fff3122654133555fb99048
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/utils.py
@@ -0,0 +1,230 @@
+from enum import Enum
+import math
+
+import torch
+
+from k_diffusion.sampling import to_d
+
+
+def clamp(x: int | float, lower: int | float, upper: int | float) -> int | float:
+ return max(lower, min(x, upper))
+
+
+# From ComfyUI
+def default_noise_sampler(x, seed=None):
+ """
+ Default noise sampler for the extended reverse SDE solver.
+ Generates Gaussian noise based on the input tensor's shape and device.
+ If a seed is provided, it uses that seed for reproducibility.
+ """
+ if seed is not None:
+ generator = torch.Generator(device=x.device)
+ generator.manual_seed(seed)
+ else:
+ generator = None
+
+ return lambda sigma, sigma_next: torch.randn(
+ x.size(), dtype=x.dtype, layout=x.layout, device=x.device, generator=generator
+ )
+
+
+class _Rescaler:
+ def __init__(self, model, x, mode, **extra_args):
+ self.model = model
+ self.x = x
+ self.mode = mode
+ self.extra_args = extra_args
+ self.init_latent, self.mask, self.nmask = model.init_latent, model.mask, model.nmask
+
+ def __enter__(self):
+ if self.init_latent is not None:
+ self.model.init_latent = torch.nn.functional.interpolate(
+ input=self.init_latent, size=self.x.shape[2:4], mode=self.mode
+ )
+ if self.mask is not None:
+ self.model.mask = torch.nn.functional.interpolate(
+ input=self.mask.unsqueeze(0), size=self.x.shape[2:4], mode=self.mode
+ ).squeeze(0)
+ if self.nmask is not None:
+ self.model.nmask = torch.nn.functional.interpolate(
+ input=self.nmask.unsqueeze(0), size=self.x.shape[2:4], mode=self.mode
+ ).squeeze(0)
+
+ return self
+
+ def __exit__(self, type, value, traceback):
+ del self.model.init_latent, self.model.mask, self.model.nmask
+ self.model.init_latent, self.model.mask, self.model.nmask = self.init_latent, self.mask, self.nmask
+
+
+@torch.no_grad()
+def overall_sampling_step(x, model, dt, sigma_hat, **extra_args):
+ original_shape = x.shape
+ batch_size, channels, m, n = original_shape[0], original_shape[1], original_shape[2] // 2, original_shape[3] // 2
+ extra_row = x.shape[2] % 2 == 1
+ extra_col = x.shape[3] % 2 == 1
+
+ if extra_row:
+ extra_row_content = x[:, :, -1:, :]
+ x = x[:, :, :-1, :]
+
+ if extra_col:
+ extra_col_content = x[:, :, :, -1:]
+ x = x[:, :, :, :-1]
+
+ a_list = x.unfold(2, 2, 2).unfold(3, 2, 2).contiguous().view(batch_size, channels, m * n, 2, 2)
+ c = a_list[:, :, :, 1, 1].view(batch_size, channels, m, n)
+
+ denoised = model(c, sigma_hat * c.new_ones([c.shape[0]]), **extra_args)
+ d = to_d(c, sigma_hat, denoised)
+ c = c + d * dt
+
+ d_list = denoised.view(batch_size, channels, m * n, 1, 1)
+ a_list[:, :, :, 1, 1] = d_list[:, :, :, 0, 0]
+
+ x = (
+ a_list.view(batch_size, channels, m, n, 2, 2)
+ .permute(0, 1, 2, 4, 3, 5)
+ .reshape(batch_size, channels, 2 * m, 2 * n)
+ )
+
+ if extra_row or extra_col:
+ x_expanded = torch.zeros(original_shape, dtype=x.dtype, device=x.device)
+ x_expanded[:, :, : 2 * m, : 2 * n] = x
+
+ if extra_row:
+ x_expanded[:, :, -1:, : 2 * n + 1] = extra_row_content
+
+ if extra_col:
+ x_expanded[:, :, : 2 * m, -1:] = extra_col_content
+
+ if extra_row and extra_col:
+ x_expanded[:, :, -1:, -1:] = extra_col_content[:, :, -1:, :]
+
+ x = x_expanded
+
+ return x
+
+
+@torch.no_grad()
+def smea_sampling_step(x, model, dt, sigma_hat, **extra_args):
+ m, n = x.shape[2], x.shape[3]
+ x = torch.nn.functional.interpolate(input=x, scale_factor=(1.25, 1.25), mode="nearest-exact")
+
+ with _Rescaler(model, x, "nearest-exact", **extra_args) as rescaler:
+ denoised = model(x, sigma_hat * x.new_ones([x.shape[0]]), **rescaler.extra_args)
+
+ d = to_d(x, sigma_hat, denoised)
+ x = x + d * dt
+ x = torch.nn.functional.interpolate(input=x, size=(m, n), mode="nearest-exact")
+
+ return x
+
+
+@torch.no_grad()
+def dy_sampling_step(x, model, dt, sigma_hat, **extra_args):
+ original_shape = x.shape
+ batch_size, channels, m, n = original_shape[0], original_shape[1], original_shape[2] // 2, original_shape[3] // 2
+ extra_row = x.shape[2] % 2 == 1
+ extra_col = x.shape[3] % 2 == 1
+
+ if extra_row:
+ extra_row_content = x[:, :, -1:, :]
+ x = x[:, :, :-1, :]
+ if extra_col:
+ extra_col_content = x[:, :, :, -1:]
+ x = x[:, :, :, :-1]
+
+ a_list = x.unfold(2, 2, 2).unfold(3, 2, 2).contiguous().view(batch_size, channels, m * n, 2, 2)
+ c = a_list[:, :, :, 1, 1].view(batch_size, channels, m, n)
+
+ with _Rescaler(model, c, "nearest-exact", **extra_args) as rescaler:
+ denoised = model(c, sigma_hat * c.new_ones([c.shape[0]]), **rescaler.extra_args)
+
+ d = to_d(c, sigma_hat, denoised)
+ c = c + d * dt
+
+ d_list = c.view(batch_size, channels, m * n, 1, 1)
+ a_list[:, :, :, 1, 1] = d_list[:, :, :, 0, 0]
+ x = (
+ a_list.view(batch_size, channels, m, n, 2, 2)
+ .permute(0, 1, 2, 4, 3, 5)
+ .reshape(batch_size, channels, 2 * m, 2 * n)
+ )
+
+ if extra_row or extra_col:
+ x_expanded = torch.zeros(original_shape, dtype=x.dtype, device=x.device)
+ x_expanded[:, :, : 2 * m, : 2 * n] = x
+
+ if extra_row:
+ x_expanded[:, :, -1:, : 2 * n + 1] = extra_row_content
+
+ if extra_col:
+ x_expanded[:, :, : 2 * m, -1:] = extra_col_content
+
+ if extra_row and extra_col:
+ x_expanded[:, :, -1:, -1:] = extra_col_content[:, :, -1:, :]
+
+ x = x_expanded
+
+ return x
+
+
+def sampler_metadata(name: str, extra_params: dict = {}, sampler_aliases: list[str] = []):
+ def decorator(func):
+ func.sampler_extra_params = extra_params
+ func.sampler_name = name
+ func.sampler_k_names = [name.replace(" ", "_").lower(), *sampler_aliases]
+ return func
+
+ return decorator
+
+
+def scheduler_metadata(name: str, alias: str, need_inner_model: bool = False):
+ def decorator(func):
+ func.name = name
+ func.alias = alias
+ func.need_inner_model = need_inner_model
+ return func
+
+ return decorator
+
+
+class Interpolator(Enum):
+ LINEAR = (lambda x: x,) # noqa: E731
+ COSINE = (lambda x: torch.sin(x * math.pi / 2),) # noqa: E731
+ SINE = (lambda x: 1 - torch.cos(x * math.pi / 2),) # noqa: E731
+
+
+# Original Implementation `ExtendIntermediateSigmas` by catboxanon: https://www.github.com/catboxanon/
+# Original class impl: https://github.com/comfyanonymous/ComfyUI/blob/065d855f14968406051a1340e3f2f26461a00e5d/comfy_extras/nodes_custom_sampler.py#L253
+def extend_sigmas(
+ sigmas: torch.Tensor,
+ steps: int,
+ start_at_sigma: float,
+ end_at_sigma: float,
+ interpolator: Interpolator = Interpolator.LINEAR,
+) -> torch.FloatTensor:
+ if start_at_sigma < 0:
+ start_at_sigma = float("inf")
+
+ # linear space for our interpolation function
+ x = torch.linspace(0, 1, steps + 1, device=sigmas.device)[1:-1]
+ computed_spacing: torch.Tensor = interpolator.value[0](x)
+
+ extended_sigmas: list[torch.Tensor] = []
+ for i in range(len(sigmas) - 1):
+ sigma_current = sigmas[i]
+ sigma_next = sigmas[i + 1]
+
+ extended_sigmas.append(sigma_current)
+
+ if end_at_sigma <= sigma_current <= start_at_sigma:
+ interpolated_steps: torch.Tensor = computed_spacing * (sigma_next - sigma_current) + sigma_current
+ extended_sigmas.extend(interpolated_steps.tolist())
+
+ # Add the last sigma value
+ if len(sigmas) > 0:
+ extended_sigmas.append(sigmas[-1])
+
+ return torch.FloatTensor(extended_sigmas)
diff --git a/sd-forge-extra-samplers/lib_es/xyz.py b/sd-forge-extra-samplers/lib_es/xyz.py
new file mode 100644
index 0000000000000000000000000000000000000000..1ba3458b6512390b2ac86ada23201f9a74bd6cf3
--- /dev/null
+++ b/sd-forge-extra-samplers/lib_es/xyz.py
@@ -0,0 +1,49 @@
+from modules import scripts
+
+import lib_es.const as consts
+
+
+def _grid_reference():
+ for data in scripts.scripts_data:
+ if data.script_class.__module__ in (
+ "scripts.xyz_grid",
+ "xyz_grid.py",
+ ) and hasattr(data, "module"):
+ return data.module
+
+ raise SystemError("Could not find X/Y/Z Plot...")
+
+
+def xyz_support(cache: dict):
+ def apply_field(field, is_bool=False):
+ def _(p, x, xs):
+ if is_bool:
+ x = True if x.lower() == "true" else False
+ cache.update({field: x})
+
+ return _
+
+ xyz_grid = _grid_reference()
+
+ extra_axis_options = [
+ xyz_grid.AxisOption("[Adaptive Prog] Ancestral Eta", float, apply_field(consts.AP_ANCESTRAL_ETA)),
+ xyz_grid.AxisOption("[Adaptive Prog] Detail Strength", float, apply_field(consts.AP_DETAIL_STRENGTH)),
+ xyz_grid.AxisOption("[Adaptive Prog] DPM++ 2M End", float, apply_field(consts.AP_DPM_2M_END)),
+ xyz_grid.AxisOption("[Adaptive Prog] Euler A End", float, apply_field(consts.AP_EULER_A_END)),
+ xyz_grid.AxisOption("[Extended Reverse-Time] Max Stage", int, apply_field(consts.ER_MAX_STAGE)),
+ xyz_grid.AxisOption("[Gradient Estimation] GE Gamma Offset", float, apply_field(consts.GE_GAMMA_OFFSET)),
+ xyz_grid.AxisOption("[Gradient Estimation] GE Gamma", float, apply_field(consts.GE_GAMMA)),
+ xyz_grid.AxisOption(
+ "[Gradient Estimation] GE Use Adaptive Steps",
+ str,
+ apply_field(consts.GE_USE_ADAPTIVE_STEPS, is_bool=True),
+ ),
+ xyz_grid.AxisOption(
+ "[Gradient Estimation] GE Use Timestep Adaptive Gamma",
+ str,
+ apply_field(consts.GE_USE_TIMESTEP_ADAPTIVE_GAMMA, is_bool=True),
+ ),
+ xyz_grid.AxisOption("[Langevin Euler] Langevin Strength", float, apply_field(consts.LANGEVIN_STRENGTH)),
+ ]
+
+ xyz_grid.axis_options.extend(extra_axis_options)
diff --git a/sd-forge-extra-samplers/pyproject.toml b/sd-forge-extra-samplers/pyproject.toml
new file mode 100644
index 0000000000000000000000000000000000000000..ae961154eabfc31d7dc77894b10d5766646b5e23
--- /dev/null
+++ b/sd-forge-extra-samplers/pyproject.toml
@@ -0,0 +1,78 @@
+[tool.ruff]
+# Exclude a variety of commonly ignored directories.
+exclude = [
+ ".bzr",
+ ".direnv",
+ ".eggs",
+ ".git",
+ ".git-rewrite",
+ ".hg",
+ ".ipynb_checkpoints",
+ ".mypy_cache",
+ ".nox",
+ ".pants.d",
+ ".pyenv",
+ ".pytest_cache",
+ ".pytype",
+ ".ruff_cache",
+ ".svn",
+ ".tox",
+ ".venv",
+ ".vscode",
+ "__pypackages__",
+ "_build",
+ "buck-out",
+ "build",
+ "dist",
+ "node_modules",
+ "site-packages",
+ "venv",
+]
+
+# Same as Black.
+line-length = 120
+indent-width = 4
+
+# Assume Python 3.8
+target-version = "py310"
+
+[tool.ruff.lint]
+# Enable Pyflakes (`F`) and a subset of the pycodestyle (`E`) codes by default.
+# Unlike Flake8, Ruff doesn't enable pycodestyle warnings (`W`) or
+# McCabe complexity (`C901`) by default.
+select = ["E4", "E7", "E9", "F"]
+ignore = []
+
+# Allow fix for all enabled rules (when `--fix`) is provided.
+fixable = ["ALL"]
+unfixable = []
+
+# Allow unused variables when underscore-prefixed.
+dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
+
+[tool.ruff.format]
+# Like Black, use double quotes for strings.
+quote-style = "double"
+
+# Like Black, indent with spaces, rather than tabs.
+indent-style = "space"
+
+# Like Black, respect magic trailing commas.
+skip-magic-trailing-comma = false
+
+# Like Black, automatically detect the appropriate line ending.
+line-ending = "auto"
+
+# Enable auto-formatting of code examples in docstrings. Markdown,
+# reStructuredText code/literal blocks and doctests are all supported.
+#
+# This is currently disabled by default, but it is planned for this
+# to be opt-out in the future.
+docstring-code-format = false
+
+# Set the line length limit used when formatting code snippets in
+# docstrings.
+#
+# This only has an effect when the `docstring-code-format` setting is
+# enabled.
+docstring-code-line-length = "dynamic"
\ No newline at end of file
diff --git a/sd-forge-extra-samplers/scripts/__pycache__/extra_samplers.cpython-310.pyc b/sd-forge-extra-samplers/scripts/__pycache__/extra_samplers.cpython-310.pyc
new file mode 100644
index 0000000000000000000000000000000000000000..eb6184dfee0a6d019e9e84663473ab92c49f363a
Binary files /dev/null and b/sd-forge-extra-samplers/scripts/__pycache__/extra_samplers.cpython-310.pyc differ
diff --git a/sd-forge-extra-samplers/scripts/extra_samplers.py b/sd-forge-extra-samplers/scripts/extra_samplers.py
new file mode 100644
index 0000000000000000000000000000000000000000..fa83aa368678f70327aa8e5ae3a22f9e14f941ed
--- /dev/null
+++ b/sd-forge-extra-samplers/scripts/extra_samplers.py
@@ -0,0 +1,359 @@
+from typing import Any
+
+import gradio as gr
+
+import modules.scripts as scripts
+from modules.processing import StableDiffusionProcessing
+from modules.script_callbacks import on_ui_settings, on_app_started
+from modules.shared import OptionInfo, opts
+
+import lib_es.const as consts
+from lib_es.xyz import xyz_support
+from lib_es.samplers import add_extra_samplers
+from lib_es.schedulers import add_schedulers
+
+from modules.script_callbacks import on_before_ui
+
+def early_init():
+ add_extra_samplers()
+ add_schedulers()
+
+on_before_ui(early_init)
+
+
+
+
+
+def from_setting_or_default(key: str, default: None | Any) -> None | Any:
+ return opts.data.get(key, default)
+
+
+def on_change_update_setting(key: str, value: Any) -> None:
+ opts.set(key, value)
+
+
+class ExtraSamplerExtension(scripts.Script):
+ def __init__(self):
+ super().__init__()
+ self.xyz_cache = {}
+ xyz_support(self.xyz_cache)
+
+ def title(self):
+ return "Extra Samplers"
+
+ def show(self, is_img2img):
+ return scripts.AlwaysVisible
+
+ def ui(self, is_img2img):
+ with gr.Accordion(label="Extra Samplers", open=False):
+ with gr.Accordion(label="Adaptive Progressive", open=False):
+ gr.Markdown("Adaptive progressive sampler that automatically adjusts to different step counts. ")
+ gr.Markdown(
+ "Phase ends are automatically adjusted based on the total number of steps. These are approximations"
+ )
+ with gr.Row():
+ euler_a_end = gr.Slider(
+ minimum=0.0,
+ maximum=1.0,
+ step=0.05,
+ value=from_setting_or_default(consts.AP_EULER_A_END, 0.35),
+ label="Euler A end",
+ )
+ dpm_2m_end = gr.Slider(
+ minimum=0.0,
+ maximum=1.0,
+ step=0.05,
+ value=from_setting_or_default(consts.AP_DPM_2M_END, 0.75),
+ label="DPM++ 2M end",
+ )
+ with gr.Row():
+ ancestral_eta = gr.Slider(
+ minimum=0.0,
+ maximum=1.0,
+ step=0.05,
+ value=from_setting_or_default(consts.AP_ANCESTRAL_ETA, 0.4),
+ label="Ancestral Eta",
+ )
+ detail_strength = gr.Slider(
+ minimum=0.0,
+ maximum=10.0,
+ step=0.1,
+ value=from_setting_or_default(consts.AP_DETAIL_STRENGTH, 1.5),
+ label="Detail Strength",
+ )
+
+ euler_a_end.change(
+ fn=lambda value: on_change_update_setting(consts.AP_EULER_A_END, value), inputs=[euler_a_end]
+ )
+ dpm_2m_end.change(
+ fn=lambda value: on_change_update_setting(consts.AP_DPM_2M_END, value), inputs=[dpm_2m_end]
+ )
+ ancestral_eta.change(
+ fn=lambda value: on_change_update_setting(consts.AP_ANCESTRAL_ETA, value),
+ inputs=[ancestral_eta],
+ )
+ detail_strength.change(
+ fn=lambda value: on_change_update_setting(consts.AP_DETAIL_STRENGTH, value),
+ inputs=[detail_strength],
+ )
+
+ with gr.Accordion(label="Langevin Euler", open=False):
+ langevin_strength = gr.Slider(
+ minimum=0.0,
+ maximum=0.5,
+ step=0.01,
+ value=from_setting_or_default(consts.LANGEVIN_STRENGTH, 0.1),
+ label="Langevin Strength",
+ info="Langevin strength for Langevin Euler sampler. Adjust to control the amount of noise.",
+ )
+ langevin_strength.change(
+ fn=lambda value: on_change_update_setting(consts.LANGEVIN_STRENGTH, value),
+ inputs=[langevin_strength],
+ )
+
+ with gr.Accordion(label="Gradient Estimation", open=False):
+ use_adaptive_steps = from_setting_or_default(consts.GE_USE_ADAPTIVE_STEPS, False)
+
+ adaptive_steps = gr.Checkbox(
+ label="Use Adaptive Steps",
+ value=use_adaptive_steps,
+ info="Modify the number of steps based on the noise schedule.",
+ )
+ use_timestep_adaptive_gamma = gr.Checkbox(
+ label="Timestep-Based Adaptive Gamma",
+ value=from_setting_or_default(consts.GE_USE_TIMESTEP_ADAPTIVE_GAMMA, False),
+ info="Adjust gamma during generation.",
+ )
+ gamma = gr.Slider(
+ minimum=consts.GE_MIN_GAMMA,
+ maximum=consts.GE_MAX_GAMMA,
+ step=0.05,
+ value=from_setting_or_default(consts.GE_GAMMA, consts.GE_DEFAULT_GAMMA),
+ label="Gamma",
+ info="Gamma value for gradient estimation. Higher values increase the amount of noise.",
+ interactive=not use_adaptive_steps,
+ )
+ gamma_offset = gr.Slider(
+ minimum=consts.GE_MIN_GAMMA_OFFSET,
+ maximum=consts.GE_MAX_GAMMA_OFFSET,
+ step=0.05,
+ value=from_setting_or_default(consts.GE_GAMMA_OFFSET, consts.GE_DEFAULT_GAMMA_OFFSET),
+ label="Gamma Offset",
+ info="Offset to add to the calculated gamma when using adaptive steps.",
+ interactive=use_adaptive_steps,
+ )
+ gamma.change(fn=lambda value: on_change_update_setting(consts.GE_GAMMA, value), inputs=[gamma])
+ gamma_offset.change(
+ fn=lambda value: on_change_update_setting(consts.GE_GAMMA_OFFSET, value), inputs=[gamma_offset]
+ )
+
+ # Update interactivity when adaptive steps checkbox changes
+ adaptive_steps.change(
+ fn=lambda value: (gr.Slider(interactive=not value), gr.Slider(interactive=value)),
+ inputs=[adaptive_steps],
+ outputs=[gamma, gamma_offset],
+ ).then(
+ fn=lambda value: on_change_update_setting(consts.GE_USE_ADAPTIVE_STEPS, value),
+ inputs=[adaptive_steps],
+ )
+
+ use_timestep_adaptive_gamma.change(
+ fn=lambda value: on_change_update_setting(consts.GE_USE_TIMESTEP_ADAPTIVE_GAMMA, value),
+ inputs=[use_timestep_adaptive_gamma],
+ )
+
+ validate_schedule = gr.Checkbox(
+ label="Validate Schedule",
+ value=from_setting_or_default(consts.GE_VALIDATE_SCHEDULE, False),
+ info="Validate the noise schedule (For debugging purposes).",
+ )
+
+ with gr.Accordion(label="Extended Reverse SDE", open=False):
+ gr.Markdown("Extended reverse SDE sampler.")
+ gr.Markdown("Max stage for extended reverse SDE.")
+ max_stage = gr.Slider(
+ minimum=1,
+ maximum=3,
+ step=1,
+ value=from_setting_or_default(consts.ER_MAX_STAGE, 3),
+ label="Max Stage",
+ )
+ max_stage.change(fn=lambda value: on_change_update_setting(consts.MAX_STAGE, value), inputs=[max_stage])
+
+ return [
+ euler_a_end,
+ dpm_2m_end,
+ ancestral_eta,
+ detail_strength,
+ langevin_strength,
+ max_stage,
+ adaptive_steps,
+ use_timestep_adaptive_gamma,
+ gamma,
+ gamma_offset,
+ validate_schedule,
+ ]
+
+ def get_values_and_apply(self, p: StableDiffusionProcessing, values: dict):
+ for key, value in values.items():
+ value = self.xyz_cache.pop(key, value)
+ setattr(p, key, value)
+ p.extra_generation_params[key] = value
+
+ def process_batch(
+ self,
+ p: StableDiffusionProcessing,
+ euler_a_end: float,
+ dpm_2m_end: float,
+ ancestral_eta: float,
+ detail_strength: float,
+ langevin_strength: float,
+ max_stage: int,
+ use_adaptive_steps: bool,
+ use_timestep_adaptive_gamma: bool,
+ gamma: float,
+ gamma_offset: float,
+ validate_schedule: bool,
+ batch_number: int,
+ prompts: list[str],
+ seeds: list[int],
+ subseeds: list[int],
+ ):
+ if p.sampler_name == "Adaptive Progressive":
+ self.get_values_and_apply(
+ p,
+ {
+ consts.AP_EULER_A_END: euler_a_end,
+ consts.AP_DPM_2M_END: dpm_2m_end,
+ consts.AP_ANCESTRAL_ETA: ancestral_eta,
+ consts.AP_DETAIL_STRENGTH: detail_strength,
+ },
+ )
+ elif p.sampler_name == "Langevin Euler":
+ self.get_values_and_apply(p, {consts.LANGEVIN_STRENGTH: langevin_strength})
+ elif p.sampler_name == "Gradient Estimation":
+ self.get_values_and_apply(
+ p,
+ {
+ consts.GE_GAMMA: gamma,
+ consts.GE_GAMMA_OFFSET: gamma_offset,
+ consts.GE_USE_ADAPTIVE_STEPS: use_adaptive_steps,
+ consts.GE_USE_TIMESTEP_ADAPTIVE_GAMMA: use_timestep_adaptive_gamma,
+ consts.GE_VALIDATE_SCHEDULE: validate_schedule,
+ },
+ )
+ elif p.sampler_name == "Extended Reverse SDE":
+ self.get_values_and_apply(p, {consts.ER_MAX_STAGE: max_stage})
+
+
+section = ("exs", "Extra Samplers")
+
+
+def on_settings():
+ opts.add_option(
+ consts.AP_EULER_A_END,
+ OptionInfo(
+ 0.35,
+ "Euler A End",
+ component=gr.Slider,
+ component_args={"minimum": 0.0, "maximum": 1.0, "step": 0.05},
+ section=section,
+ ),
+ )
+ opts.add_option(
+ consts.AP_DPM_2M_END,
+ OptionInfo(
+ 0.75,
+ "DPM++ 2M End",
+ component=gr.Slider,
+ component_args={"minimum": 0.0, "maximum": 1.0, "step": 0.05},
+ section=section,
+ ),
+ )
+ opts.add_option(
+ consts.AP_ANCESTRAL_ETA,
+ OptionInfo(
+ 0.4,
+ "Adaptive Progressive Eta",
+ component=gr.Slider,
+ component_args={"minimum": 0.0, "maximum": 1.0, "step": 0.01},
+ section=section,
+ ),
+ )
+ opts.add_option(
+ consts.AP_DETAIL_STRENGTH,
+ OptionInfo(
+ 1.5,
+ "Adaptive Progressive Detail Strength",
+ component=gr.Slider,
+ component_args={"minimum": 0.0, "maximum": 3.0, "step": 0.01},
+ section=section,
+ ),
+ )
+
+ opts.add_option(
+ consts.LANGEVIN_STRENGTH,
+ OptionInfo(
+ 0.1,
+ "Langevin Strength",
+ component=gr.Slider,
+ component_args={"minimum": 0.0, "maximum": 1.0, "step": 0.01},
+ section=section,
+ ),
+ )
+
+ opts.add_option(
+ consts.ER_MAX_STAGE,
+ OptionInfo(
+ 3,
+ "Extended Reverse Time Max Stage",
+ component=gr.Slider,
+ component_args={"minimum": 1, "maximum": 3, "step": 1},
+ section=section,
+ ),
+ )
+
+ opts.add_option(
+ consts.GE_GAMMA,
+ OptionInfo(
+ consts.GE_DEFAULT_GAMMA,
+ "Gradient Estimation Gamma",
+ component=gr.Slider,
+ component_args={"minimum": consts.GE_MIN_GAMMA, "maximum": consts.GE_MAX_GAMMA, "step": 0.1},
+ section=section,
+ ),
+ )
+
+ opts.add_option(
+ consts.GE_GAMMA_OFFSET,
+ OptionInfo(
+ consts.GE_DEFAULT_GAMMA_OFFSET,
+ "Gradient Estimation Gamma Offset",
+ component=gr.Slider,
+ component_args={"minimum": consts.GE_MIN_GAMMA_OFFSET, "maximum": consts.GE_MAX_GAMMA_OFFSET, "step": 0.1},
+ section=section,
+ ),
+ )
+
+ opts.add_option(
+ consts.GE_USE_ADAPTIVE_STEPS,
+ OptionInfo(
+ False,
+ "Use Adaptive Steps",
+ component=gr.Checkbox,
+ section=section,
+ ),
+ )
+
+ opts.add_option(
+ consts.GE_USE_TIMESTEP_ADAPTIVE_GAMMA,
+ OptionInfo(
+ False,
+ "Use Timestep Adaptive Gamma",
+ component=gr.Checkbox,
+ section=section,
+ ),
+ )
+
+
+on_ui_settings(on_settings)