Files
BenNarum-SigmaWaveFormNode/sigma_waveform_node.py
T

602 lines
26 KiB
Python

import numpy as np
import torch
def loglinear_interp(t_steps, num_steps):
"""
Performs log-linear interpolation of a given array of decreasing numbers.
"""
xs = np.linspace(0, 1, len(t_steps))
ys = np.log(t_steps[::-1])
new_xs = np.linspace(0, 1, num_steps)
new_ys = np.interp(new_xs, xs, ys)
interped_ys = np.exp(new_ys)[::-1].copy()
return interped_ys
def RESDECoeffsSecondOrder(h):
"""
Calculate the coefficients for the RES solver.
"""
b1 = 1.0 - 0.5 * h
b2 = 0.5 * h
return b1, b2
class SigmaWaveFormNodeSimple:
def __init__(self):
self.steps = 200
self.amplitude = 3.0
self.frequency = 0.1
self.damping_factor = 0.03
self.waveform_type = "sine"
self.enable_unidirectional = True
@classmethod
def INPUT_TYPES(cls):
return {
"required": {
"steps": ("INT", {"default": 200, "min": 1, "max": 1000, "step": 1}),
"amplitude": ("FLOAT", {"default": 3.0, "min": 0.1, "max": 10.0, "step": 0.1}),
"frequency": ("FLOAT", {"default": 0.1, "min": 0.01, "max": 1.0, "step": 0.01}),
"damping_factor": ("FLOAT", {"default": 0.03, "min": 0.001, "max": 0.1, "step": 0.001}),
"waveform_type": (["sine", "sawtooth", "stepped", "square", "random"], {"default": "sine"}),
"enable_unidirectional": ("BOOLEAN", {"default": True, "description": "Whether to make the waveform unidirectional"}),
},
}
RETURN_TYPES = ("SIGMAS",)
RETURN_NAMES = ("sigmas",)
FUNCTION = "generate_sigma_sequence"
CATEGORY = "sampling/custom_sampling/schedulers"
def generate_sine_wave(self, t):
return self.amplitude * np.exp(-self.damping_factor * t) * np.sin(2 * np.pi * self.frequency * t)
def generate_sawtooth_wave(self, t):
return self.amplitude * np.exp(-self.damping_factor * t) * 2 * (t * self.frequency - np.floor(0.5 + t * self.frequency))
def generate_stepped_wave(self, t):
steps_per_segment = self.steps // 10
return np.repeat(np.linspace(self.amplitude, -self.amplitude, 10), steps_per_segment)
def generate_square_wave(self, t):
return self.amplitude * np.exp(-self.damping_factor * t) * np.sign(np.sin(2 * np.pi * self.frequency * t))
def generate_random_wave(self, t):
return self.amplitude * np.exp(-self.damping_factor * t) * (2 * np.random.rand(self.steps) - 1)
def make_unidirectional(self, sigma):
return sigma - np.min(sigma)
def generate_sigma_sequence(self, steps, amplitude, frequency, damping_factor, waveform_type, enable_unidirectional):
self.steps = steps
self.amplitude = amplitude
self.frequency = frequency
self.damping_factor = damping_factor
self.waveform_type = waveform_type
self.enable_unidirectional = enable_unidirectional
t = np.linspace(0, 1, steps)
if waveform_type == "sine":
sigma = self.generate_sine_wave(t)
elif waveform_type == "sawtooth":
sigma = self.generate_sawtooth_wave(t)
elif waveform_type == "stepped":
sigma = self.generate_stepped_wave(t)
elif waveform_type == "square":
sigma = self.generate_square_wave(t)
elif waveform_type == "random":
sigma = self.generate_random_wave(t)
else:
sigma = np.zeros(steps) # Default case
if enable_unidirectional:
sigma = self.make_unidirectional(sigma)
# Ensure sigma values are in the correct format
sigma_tensor = torch.tensor(sigma, dtype=torch.float64)
return (sigma_tensor,)
def update_parameters(self, steps=None, amplitude=None, frequency=None, damping_factor=None, waveform_type=None, enable_unidirectional=None):
if steps is not None:
self.steps = steps
if amplitude is not None:
self.amplitude = amplitude
if frequency is not None:
self.frequency = frequency
if damping_factor is not None:
self.damping_factor = damping_factor
if waveform_type is not None:
self.waveform_type = waveform_type
if enable_unidirectional is not None:
self.enable_unidirectional = enable_unidirectional
return self.generate_sigma_sequence(
self.steps,
self.amplitude,
self.frequency,
self.damping_factor,
self.waveform_type,
self.enable_unidirectional
)
class SigmaWaveFormNode:
def __init__(self):
self.steps = 60
self.amplitude = 3.0
self.frequency = 0.1
self.damping_factor = 0.03
self.waveform_type = "sine"
self.enable_damping = True
self.min_sigma = 0.0
self.apply_fourier = False
self.horizontal_length = 0.1
self.enable_unidirectional = True
@classmethod
def INPUT_TYPES(cls):
return {
"required": {
"steps": ("INT", {"default": 60, "min": 1, "max": 1000, "step": 1}),
"amplitude": ("FLOAT", {"default": 3.0, "min": 0.1, "max": 100.0, "step": 0.1, "description": "Amplitude of the waveform"}),
"frequency": ("FLOAT", {"default": 0.1, "min": 0.01, "max": 10.0, "step": 0.01, "description": "Frequency of the waveform"}),
"waveform_type": (["sine", "sawtooth", "stepped", "square", "random", "triangle", "rectangular"], {"default": "sine", "description": "Type of the waveform"}),
"damping_factor": ("FLOAT", {"default": 0.03, "min": 0.0, "max": 0.1, "step": 0.001, "description": "Damping factor for the waveform"}),
"enable_damping": ("BOOLEAN", {"default": True, "description": "Whether to apply damping to the waveform"}),
"min_sigma": ("FLOAT", {"default": 0.0, "min": 0.0, "max": 10.0, "step": 0.1, "description": "Minimum sigma value"}),
"apply_fourier": ("BOOLEAN", {"default": False, "description": "Whether to apply Fourier transform to the waveform"}),
"horizontal_length": ("FLOAT", {"default": 0.1, "min": 0.00, "max": 1.0, "step": 0.01, "description": "Proportion of each horizontal segment length in the stepped waveform"}),
"enable_unidirectional": ("BOOLEAN", {"default": True, "description": "Whether to make the waveform unidirectional"}),
},
}
RETURN_TYPES = ("SIGMAS",)
RETURN_NAMES = ("sigmas",)
FUNCTION = "generate_sigma_sequence"
CATEGORY = "sampling/custom_sampling/schedulers"
def apply_damping(self, t, values):
if self.enable_damping:
return values * np.exp(-self.damping_factor * t)
return values
def generate_waveform(self, waveform_type, amplitude, frequency, t):
if waveform_type == "sine":
values = amplitude * np.sin(2 * np.pi * frequency * t)
elif waveform_type == "sawtooth":
values = amplitude * 2 * (t * frequency - np.floor(0.5 + t * frequency))
elif waveform_type == "stepped":
num_segments = int(1 / self.horizontal_length)
steps_per_segment = self.steps // num_segments
values = np.repeat(np.linspace(amplitude, -amplitude, num_segments), steps_per_segment)
values = np.resize(values, self.steps)
elif waveform_type == "square":
values = amplitude * np.sign(np.sin(2 * np.pi * frequency * t))
elif waveform_type == "random":
values = amplitude * (2 * np.random.rand(self.steps) - 1)
elif waveform_type == "triangle":
values = amplitude * (2 * np.abs(2 * (t * frequency - np.floor(t * frequency + 0.5))) - 1)
elif waveform_type == "rectangular":
values = amplitude * (np.mod(t * frequency, 1) < 0.5).astype(float)
else:
values = np.zeros(self.steps)
return values
def apply_fourier_transform(self, values):
fft_vals = np.fft.fft(values)
fft_vals[5:] = 0
values = np.fft.ifft(fft_vals).real
return values
def make_unidirectional(self, values):
return values - np.min(values) + self.min_sigma
def generate_sigma_sequence(self, steps, amplitude, frequency, waveform_type, damping_factor, enable_damping, min_sigma, apply_fourier, horizontal_length, enable_unidirectional):
self.steps = steps
self.amplitude = amplitude
self.frequency = frequency
self.waveform_type = waveform_type
self.damping_factor = damping_factor
self.enable_damping = enable_damping
self.min_sigma = min_sigma
self.apply_fourier = apply_fourier
self.horizontal_length = horizontal_length
self.enable_unidirectional = enable_unidirectional
t = np.linspace(0, 1, steps)
sigma = self.generate_waveform(waveform_type, amplitude, frequency, t)
if enable_unidirectional:
sigma = self.make_unidirectional(sigma)
if enable_damping:
sigma = self.apply_damping(t, sigma)
if apply_fourier:
sigma = self.apply_fourier_transform(sigma)
sigma_tensor = torch.tensor(sigma, dtype=torch.float64)
return (sigma_tensor,)
def update_parameters(self, steps=None, amplitude=None, frequency=None, waveform_type=None, damping_factor=None, enable_damping=None, min_sigma=None, apply_fourier=None, horizontal_length=None, enable_unidirectional=None):
if steps is not None:
self.steps = steps
if amplitude is not None:
self.amplitude = amplitude
if frequency is not None:
self.frequency = frequency
if waveform_type is not None:
self.waveform_type = waveform_type
if damping_factor is not None:
self.damping_factor = damping_factor
if enable_damping is not None:
self.enable_damping = enable_damping
if min_sigma is not None:
self.min_sigma = min_sigma
if apply_fourier is not None:
self.apply_fourier = apply_fourier
if horizontal_length is not None:
self.horizontal_length = horizontal_length
if enable_unidirectional is not None:
self.enable_unidirectional = enable_unidirectional
return self.generate_sigma_sequence(
self.steps,
self.amplitude,
self.frequency,
self.waveform_type,
self.damping_factor,
self.enable_damping,
self.min_sigma,
self.apply_fourier,
self.horizontal_length,
self.enable_unidirectional
)
class SigmaWaveFormNodeAdvanced:
def __init__(self):
self.steps = 60
self.amplitude1 = 3.0
self.frequency1 = 0.1
self.amplitude2 = 3.0
self.frequency2 = 0.1
self.damping_factor = 0.03
self.waveform_type1 = "sine"
self.waveform_type2 = "sine"
self.blend_factor = 0.5
self.enable_damping = True
self.min_sigma = 0.0
self.apply_fourier = False
self.horizontal_length = 0.1
self.apply_loglinear = False
self.noise_fine_tune = 1.0
self.enable_unidirectional = True
@classmethod
def INPUT_TYPES(cls):
return {
"required": {
"steps": ("INT", {"default": 60, "min": 1, "max": 1000, "step": 1}),
"noise_fine_tune": ("FLOAT", {"default": 1.0, "min": 0.0, "max": 10.0, "step": 0.1, "description": "Fine-tuning factor for noise levels"}),
"waveform_type1": (["sine", "sawtooth", "stepped", "square", "random", "triangle", "rectangular"], {"default": "sine", "description": "Type of the first waveform"}),
"waveform_type2": (["sine", "sawtooth", "stepped", "square", "random", "triangle", "rectangular"], {"default": "sine", "description": "Type of the second waveform"}),
"blend_factor": ("FLOAT", {"default": 0.5, "min": 0.0, "max": 1.0, "step": 0.01, "description": "Blending factor between the two waveforms"}),
"amplitude1": ("FLOAT", {"default": 3.0, "min": 0.1, "max": 100.0, "step": 0.1, "description": "Amplitude of the first waveform"}),
"amplitude2": ("FLOAT", {"default": 3.0, "min": 0.1, "max": 100.0, "step": 0.1, "description": "Amplitude of the second waveform"}),
"frequency1": ("FLOAT", {"default": 0.1, "min": 0.01, "max": 10.0, "step": 0.01, "description": "Frequency of the first waveform"}),
"frequency2": ("FLOAT", {"default": 0.1, "min": 0.01, "max": 10.0, "step": 0.01, "description": "Frequency of the second waveform"}),
"horizontal_length": ("FLOAT", {"default": 0.1, "min": 0.01, "max": 1.0, "step": 0.01, "description": "Proportion of each horizontal segment length in the stepped waveform"}),
"min_sigma": ("FLOAT", {"default": 0.0, "min": 0.0, "max": 10.0, "step": 0.1, "description": "Minimum sigma value"}),
"apply_fourier": ("BOOLEAN", {"default": False, "description": "Whether to apply Fourier transform to the waveform"}),
"apply_loglinear": ("BOOLEAN", {"default": False, "description": "Whether to apply log-linear interpolation to the sigma values"}),
"enable_damping": ("BOOLEAN", {"default": True, "description": "Whether to apply damping to the waveform"}),
"damping_factor": ("FLOAT", {"default": 0.03, "min": 0.0, "max": 0.1, "step": 0.001, "description": "Damping factor for the waveform"}),
"enable_unidirectional": ("BOOLEAN", {"default": True, "description": "Whether to make the waveform unidirectional"})
},
}
RETURN_TYPES = ("SIGMAS",)
RETURN_NAMES = ("sigmas",)
FUNCTION = "generate_sigma_sequence"
CATEGORY = "sampling/custom_sampling/schedulers"
def apply_damping(self, t, values):
if self.enable_damping:
return values * np.exp(-self.damping_factor * t)
return values
def generate_waveform(self, waveform_type, amplitude, frequency, t):
if waveform_type == "sine":
values = amplitude * np.sin(2 * np.pi * frequency * t)
elif waveform_type == "sawtooth":
values = amplitude * 2 * (t * frequency - np.floor(0.5 + t * frequency))
elif waveform_type == "stepped":
num_segments = int(1 / self.horizontal_length)
steps_per_segment = self.steps // num_segments
values = np.repeat(np.linspace(amplitude, -amplitude, num_segments), steps_per_segment)
values = np.resize(values, self.steps)
elif waveform_type == "square":
values = amplitude * np.sign(np.sin(2 * np.pi * frequency * t))
elif waveform_type == "random":
values = amplitude * (2 * np.random.rand(self.steps) - 1)
elif waveform_type == "triangle":
values = amplitude * (2 * np.abs(2 * (t * frequency - np.floor(t * frequency + 0.5))) - 1)
elif waveform_type == "rectangular":
values = amplitude * (np.mod(t * frequency, 1) < 0.5).astype(float)
else:
values = np.zeros(self.steps)
return values
def apply_fourier_transform(self, values):
fft_vals = np.fft.fft(values)
fft_vals[5:] = 0
values = np.fft.ifft(fft_vals).real
return values
def make_unidirectional(self, values):
return values - np.min(values) + self.min_sigma
def refined_exponential_solver(self, sigma, steps):
"""
Apply the refined exponential solver for the sigma sequence.
"""
h = 1 / steps
b1, b2 = RESDECoeffsSecondOrder(h)
x = np.zeros(steps)
for n in range(steps - 1):
x[n + 1] = x[n] + h * (b1 * sigma[n] + b2 * sigma[n + 1])
return x
def generate_sigma_sequence(self, steps, amplitude1, frequency1, waveform_type1, amplitude2, frequency2, waveform_type2, blend_factor, damping_factor, enable_damping, min_sigma, apply_fourier, horizontal_length, apply_loglinear, noise_fine_tune, enable_unidirectional):
self.steps = steps
self.amplitude1 = amplitude1
self.frequency1 = frequency1
self.waveform_type1 = waveform_type1
self.amplitude2 = amplitude2
self.frequency2 = frequency2
self.waveform_type2 = waveform_type2
self.blend_factor = blend_factor
self.damping_factor = damping_factor
self.enable_damping = enable_damping
self.min_sigma = min_sigma
self.apply_fourier = apply_fourier
self.horizontal_length = horizontal_length
self.apply_loglinear = apply_loglinear
self.noise_fine_tune = noise_fine_tune
self.enable_unidirectional = enable_unidirectional
t = np.linspace(0, 1, steps)
sigma1 = self.generate_waveform(waveform_type1, amplitude1, frequency1, t)
sigma2 = self.generate_waveform(waveform_type2, amplitude2, frequency2, t)
sigma = blend_factor * sigma1 + (1 - blend_factor) * sigma2
if self.enable_unidirectional:
sigma = self.make_unidirectional(sigma)
if enable_damping:
sigma = self.apply_damping(t, sigma)
if apply_fourier:
sigma = self.apply_fourier_transform(sigma)
if apply_loglinear:
sigma = loglinear_interp(sigma, steps)
sigma *= noise_fine_tune
sigma = self.refined_exponential_solver(sigma, steps)
sigma_tensor = torch.tensor(sigma, dtype=torch.float64)
return (sigma_tensor,)
def update_parameters(self, amplitude1=None, frequency1=None, amplitude2=None, frequency2=None, blend_factor=None, damping_factor=None, horizontal_length=None, apply_loglinear=None, noise_fine_tune=None, enable_unidirectional=None):
if amplitude1 is not None:
self.amplitude1 = amplitude1
if frequency1 is not None:
self.frequency1 = frequency1
if amplitude2 is not None:
self.amplitude2 = amplitude2
if frequency2 is not None:
self.frequency2 = frequency2
if blend_factor is not None:
self.blend_factor = blend_factor
if damping_factor is not None:
self.damping_factor = damping_factor
if horizontal_length is not None:
self.horizontal_length = horizontal_length
if apply_loglinear is not None:
self.apply_loglinear = apply_loglinear
if noise_fine_tune is not None:
self.noise_fine_tune = noise_fine_tune
if enable_unidirectional is not None:
self.enable_unidirectional = enable_unidirectional
self.generate_sigma_sequence(
self.steps,
self.amplitude1,
self.frequency1,
self.waveform_type1,
self.amplitude2,
self.frequency2,
self.waveform_type2,
self.blend_factor,
self.damping_factor,
self.enable_damping,
self.min_sigma,
self.apply_fourier,
self.horizontal_length,
self.apply_loglinear,
self.noise_fine_tune,
self.enable_unidirectional
)
import numpy as np
import torch
class FourierFilterNode:
def __init__(self):
self.filter_type = "lowpass"
self.cutoff_frequency = 0.1
self.apply_inverse_fourier = True
@classmethod
def INPUT_TYPES(cls):
return {
"required": {
"sigmas": ("SIGMAS", {"description": "Input sigma sequence"}),
"filter_type": (["lowpass", "highpass", "bandpass", "bandstop"], {"default": "lowpass", "description": "Type of frequency filter to apply"}),
"cutoff_frequency": ("FLOAT", {"default": 0.1, "min": 0.01, "max": 0.5, "step": 0.01, "description": "Cutoff frequency for the filter"}),
"apply_inverse_fourier": ("BOOLEAN", {"default": True, "description": "Whether to apply inverse Fourier transform"}),
},
}
RETURN_TYPES = ("SIGMAS",)
RETURN_NAMES = ("filtered_sigmas",)
FUNCTION = "apply_filter"
CATEGORY = "sampling/custom_sampling/filters"
def apply_filter(self, sigmas, filter_type, cutoff_frequency, apply_inverse_fourier):
self.filter_type = filter_type
self.cutoff_frequency = cutoff_frequency
self.apply_inverse_fourier = apply_inverse_fourier
# Convert input tensor to numpy array
sigma = sigmas.numpy()
# Apply Fourier Transform
fft_vals = np.fft.fft(sigma)
# Apply the selected filter
filtered_fft_vals = self.apply_frequency_filter(fft_vals, filter_type, cutoff_frequency)
# Optionally apply inverse Fourier transform
if apply_inverse_fourier:
filtered_sigma = np.fft.ifft(filtered_fft_vals).real
else:
filtered_sigma = filtered_fft_vals
# Convert filtered result back to tensor
filtered_sigma_tensor = torch.tensor(filtered_sigma, dtype=torch.float32)
return (filtered_sigma_tensor,)
def apply_frequency_filter(self, fft_vals, filter_type, cutoff_frequency):
freqs = np.fft.fftfreq(len(fft_vals))
filtered_fft_vals = np.copy(fft_vals)
if filter_type == "lowpass":
filtered_fft_vals[np.abs(freqs) > cutoff_frequency] = 0
elif filter_type == "highpass":
filtered_fft_vals[np.abs(freqs) < cutoff_frequency] = 0
elif filter_type == "bandpass":
band = (cutoff_frequency, cutoff_frequency * 2) # Example band range, can be adjusted
filtered_fft_vals[(np.abs(freqs) < band[0]) | (np.abs(freqs) > band[1])] = 0
elif filter_type == "bandstop":
band = (cutoff_frequency, cutoff_frequency * 2) # Example band range, can be adjusted
filtered_fft_vals[(np.abs(freqs) > band[0]) & (np.abs(freqs) < band[1])] = 0
return filtered_fft_vals
class AttenuatorNode:
def __init__(self):
self.attenuation_factor = 1.0
@classmethod
def INPUT_TYPES(cls):
return {
"required": {
"sigmas": ("SIGMAS", {"description": "Input sigma sequence"}),
"attenuation_factor": ("FLOAT", {"default": 1.0, "min": -10.0, "max": 10.0, "step": 0.1, "description": "Factor by which to attenuate the sigma sequence"}),
},
}
RETURN_TYPES = ("SIGMAS",)
RETURN_NAMES = ("attenuated_sigmas",)
FUNCTION = "apply_attenuation"
CATEGORY = "sampling/custom_sampling/attenuators"
def apply_attenuation(self, sigmas, attenuation_factor):
self.attenuation_factor = attenuation_factor
# Apply attenuation
attenuated_sigma = sigmas * attenuation_factor
return (attenuated_sigma,)
class PhaseLockedLoopNode:
def __init__(self):
self.lock_factor = 0.5
self.frequency_range = 1.0
@classmethod
def INPUT_TYPES(cls):
return {
"required": {
"input_sigmas": ("SIGMAS", {"description": "Input sigma sequence"}),
"reference_sigmas": ("SIGMAS", {"description": "Reference sigma sequence"}),
"lock_factor": ("FLOAT", {"default": 0.5, "min": 0.0, "max": 1.0, "step": 0.01, "description": "Factor by which to lock the phase"}),
"frequency_range": ("FLOAT", {"default": 1.0, "min": 0.1, "max": 10.0, "step": 0.1, "description": "Frequency range for the PLL"}),
},
}
RETURN_TYPES = ("SIGMAS",)
RETURN_NAMES = ("locked_sigmas",)
FUNCTION = "lock_phase"
CATEGORY = "sampling/custom_sampling/phase_locked_loop"
def lock_phase(self, input_sigmas, reference_sigmas, lock_factor, frequency_range):
self.lock_factor = lock_factor
self.frequency_range = frequency_range
# Convert tensors to numpy arrays
input_sigma = input_sigmas.numpy()
reference_sigma = reference_sigmas.numpy()
# Initialize output signal
locked_sigma = np.zeros_like(input_sigma)
# Phase Locked Loop logic (simplified example)
phase_error = 0
for i in range(len(input_sigma)):
phase_error += reference_sigma[i] - input_sigma[i]
correction = self.lock_factor * phase_error
locked_sigma[i] = input_sigma[i] + correction
# Apply frequency range limits
locked_sigma = np.clip(locked_sigma, -self.frequency_range, self.frequency_range)
# Convert the locked sigma back to a tensor
locked_sigma_tensor = torch.tensor(locked_sigma, dtype=torch.float32)
return (locked_sigma_tensor,)
# Node class mappings
NODE_CLASS_MAPPINGS = {
"SigmaWaveFormNodeSimple": SigmaWaveFormNodeSimple,
"SigmaWaveFormNode": SigmaWaveFormNode,
"SigmaWaveFormNodeAdvanced": SigmaWaveFormNodeAdvanced,
"FourierFilterNode": FourierFilterNode,
"PhaseLockedLoopNode": PhaseLockedLoopNode,
"AttenuatorNode": AttenuatorNode
}
# Node display name mappings
NODE_DISPLAY_NAME_MAPPINGS = {
"SigmaWaveFormNodeSimple": "Sigma Waveform Node Simple",
"SigmaWaveFormNode": "Sigma Waveform Node",
"SigmaWaveFormNodeAdvanced": "Sigma Waveform Node Advanced",
"FourierFilterNode": "Fourier Filter Node",
"PhaseLockedLoopNode": "Phase Locked Loop Node",
"AttenuatorNode": "Attenuator Node"
}