From 2aafe47a589ad9f3e52dde26ec987602fae3ab6d Mon Sep 17 00:00:00 2001
From: WangCunzheng <113966965+WangCunzheng@users.noreply.github.com>
Date: Mon, 18 Nov 2024 21:34:23 +0800
Subject: [PATCH] Create scheduler.py

---
 train/SD15/scheduler.py | 515 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 515 insertions(+)
 create mode 100644 train/SD15/scheduler.py

diff --git a/train/SD15/scheduler.py b/train/SD15/scheduler.py
new file mode 100644
index 0000000..ec17346
--- /dev/null
+++ b/train/SD15/scheduler.py
@@ -0,0 +1,515 @@
+from diffusers import TCDScheduler, DPMSolverSinglestepScheduler
+from diffusers.schedulers.scheduling_tcd import *
+from diffusers.schedulers.scheduling_dpmsolver_singlestep import *
+
+class TDDScheduler(DPMSolverSinglestepScheduler):
+    @register_to_config
+    def __init__(
+        self,
+        num_train_timesteps: int = 1000,
+        beta_start: float = 0.0001,
+        beta_end: float = 0.02,
+        beta_schedule: str = "linear",
+        trained_betas: Optional[np.ndarray] = None,
+        solver_order: int = 1,
+        prediction_type: str = "epsilon",
+        thresholding: bool = False,
+        dynamic_thresholding_ratio: float = 0.995,
+        sample_max_value: float = 1.0,
+        algorithm_type: str = "dpmsolver++",
+        solver_type: str = "midpoint",
+        lower_order_final: bool = False,
+        use_karras_sigmas: Optional[bool] = False,
+        final_sigmas_type: Optional[str] = "zero",  # "zero", "sigma_min"
+        lambda_min_clipped: float = -float("inf"),
+        variance_type: Optional[str] = None,
+        tdd_train_step: int = 250,
+        special_jump: bool = False,
+        t_l: int = -1
+    ):
+        self.t_l = t_l
+        self.special_jump = special_jump
+        self.tdd_train_step = tdd_train_step
+        if algorithm_type == "dpmsolver":
+            deprecation_message = "algorithm_type `dpmsolver` is deprecated and will be removed in a future version. Choose from `dpmsolver++` or `sde-dpmsolver++` instead"
+            deprecate("algorithm_types=dpmsolver", "1.0.0", deprecation_message)
+
+        if trained_betas is not None:
+            self.betas = torch.tensor(trained_betas, dtype=torch.float32)
+        elif beta_schedule == "linear":
+            self.betas = torch.linspace(beta_start, beta_end, num_train_timesteps, dtype=torch.float32)
+        elif beta_schedule == "scaled_linear":
+            # this schedule is very specific to the latent diffusion model.
+            self.betas = torch.linspace(beta_start**0.5, beta_end**0.5, num_train_timesteps, dtype=torch.float32) ** 2
+        elif beta_schedule == "squaredcos_cap_v2":
+            # Glide cosine schedule
+            self.betas = betas_for_alpha_bar(num_train_timesteps)
+        else:
+            raise NotImplementedError(f"{beta_schedule} does is not implemented for {self.__class__}")
+
+        self.alphas = 1.0 - self.betas
+        self.alphas_cumprod = torch.cumprod(self.alphas, dim=0)
+        # Currently we only support VP-type noise schedule
+        self.alpha_t = torch.sqrt(self.alphas_cumprod)
+        self.sigma_t = torch.sqrt(1 - self.alphas_cumprod)
+        self.lambda_t = torch.log(self.alpha_t) - torch.log(self.sigma_t)
+        self.sigmas = ((1 - self.alphas_cumprod) / self.alphas_cumprod) ** 0.5
+
+        # standard deviation of the initial noise distribution
+        self.init_noise_sigma = 1.0
+
+        # settings for DPM-Solver
+        if algorithm_type not in ["dpmsolver", "dpmsolver++"]:
+            if algorithm_type == "deis":
+                self.register_to_config(algorithm_type="dpmsolver++")
+            else:
+                raise NotImplementedError(f"{algorithm_type} does is not implemented for {self.__class__}")
+        if solver_type not in ["midpoint", "heun"]:
+            if solver_type in ["logrho", "bh1", "bh2"]:
+                self.register_to_config(solver_type="midpoint")
+            else:
+                raise NotImplementedError(f"{solver_type} does is not implemented for {self.__class__}")
+
+        if algorithm_type != "dpmsolver++" and final_sigmas_type == "zero":
+            raise ValueError(
+                f"`final_sigmas_type` {final_sigmas_type} is not supported for `algorithm_type` {algorithm_type}. Please chooose `sigma_min` instead."
+            )
+
+        # setable values
+        self.num_inference_steps = None
+        timesteps = np.linspace(0, num_train_timesteps - 1, num_train_timesteps, dtype=np.float32)[::-1].copy()
+        self.timesteps = torch.from_numpy(timesteps)
+        self.model_outputs = [None] * solver_order
+        self.sample = None
+        self.order_list = self.get_order_list(num_train_timesteps)
+        self._step_index = None
+        self._begin_index = None
+        self.sigmas = self.sigmas.to("cpu")  # to avoid too much CPU/GPU communication
+
+    def set_timesteps(self, num_inference_steps: int, device: Union[str, torch.device] = None):
+        self.num_inference_steps = num_inference_steps
+        # Clipping the minimum of all lambda(t) for numerical stability.
+        # This is critical for cosine (squaredcos_cap_v2) noise schedule.
+        #original_steps = self.config.original_inference_steps
+        if True:
+            original_steps=self.tdd_train_step
+            k = 1000 / original_steps
+            tcd_origin_timesteps = np.asarray(list(range(1, int(original_steps) + 1))) * k - 1
+        else:
+            tcd_origin_timesteps = np.asarray(list(range(0, int(self.config.num_train_timesteps))))
+        # TCD Inference Steps Schedule
+        tcd_origin_timesteps = tcd_origin_timesteps[::-1].copy()
+        # Select (approximately) evenly spaced indices from tcd_origin_timesteps.
+        inference_indices = np.linspace(0, len(tcd_origin_timesteps), num=num_inference_steps, endpoint=False)
+        inference_indices = np.floor(inference_indices).astype(np.int64)
+        timesteps = tcd_origin_timesteps[inference_indices]
+        if self.special_jump:
+            if self.tdd_train_step == 50:
+                #timesteps = np.array([999., 879., 759., 499., 259.])
+                print(timesteps)
+            elif self.tdd_train_step == 250:
+                if num_inference_steps == 5:
+                    timesteps = np.array([999., 875., 751., 499., 251.])
+                elif num_inference_steps == 6:
+                    timesteps = np.array([999., 875., 751., 627., 499., 251.])
+                elif num_inference_steps == 7:
+                    timesteps = np.array([999., 875., 751., 627., 499., 375., 251.])
+
+        sigmas = np.array(((1 - self.alphas_cumprod) / self.alphas_cumprod) ** 0.5)
+        if self.config.use_karras_sigmas:
+            log_sigmas = np.log(sigmas)
+            sigmas = np.flip(sigmas).copy()
+            sigmas = self._convert_to_karras(in_sigmas=sigmas, num_inference_steps=num_inference_steps)
+            timesteps = np.array([self._sigma_to_t(sigma, log_sigmas) for sigma in sigmas]).round()
+        else:
+            sigmas = np.interp(timesteps, np.arange(0, len(sigmas)), sigmas)
+
+        if self.config.final_sigmas_type == "sigma_min":
+            sigma_last = ((1 - self.alphas_cumprod[0]) / self.alphas_cumprod[0]) ** 0.5
+        elif self.config.final_sigmas_type == "zero":
+            sigma_last = 0
+        else:
+            raise ValueError(
+                f" `final_sigmas_type` must be one of `sigma_min` or `zero`, but got {self.config.final_sigmas_type}"
+            )
+        sigmas = np.concatenate([sigmas, [sigma_last]]).astype(np.float32)
+
+        self.sigmas = torch.from_numpy(sigmas).to(device=device)
+
+        self.timesteps = torch.from_numpy(timesteps).to(device=device, dtype=torch.int64)
+        self.model_outputs = [None] * self.config.solver_order
+        self.sample = None
+
+        if not self.config.lower_order_final and num_inference_steps % self.config.solver_order != 0:
+            logger.warning(
+                "Changing scheduler {self.config} to have `lower_order_final` set to True to handle uneven amount of inference steps. Please make sure to always use an even number of `num_inference steps when using `lower_order_final=False`."
+            )
+            self.register_to_config(lower_order_final=True)
+
+        if not self.config.lower_order_final and self.config.final_sigmas_type == "zero":
+            logger.warning(
+                " `last_sigmas_type='zero'` is not supported for `lower_order_final=False`. Changing scheduler {self.config} to have `lower_order_final` set to True."
+            )
+            self.register_to_config(lower_order_final=True)
+
+        self.order_list = self.get_order_list(num_inference_steps)
+
+        # add an index counter for schedulers that allow duplicated timesteps
+        self._step_index = None
+        self._begin_index = None
+        self.sigmas = self.sigmas.to("cpu")  # to avoid too much CPU/GPU communication
+
+    def set_timesteps_s(self, eta: float = 0.0):
+        # Clipping the minimum of all lambda(t) for numerical stability.
+        # This is critical for cosine (squaredcos_cap_v2) noise schedule.
+        num_inference_steps = self.num_inference_steps
+        device = self.timesteps.device
+        if True:
+            original_steps=self.tdd_train_step
+            k = 1000 / original_steps
+            tcd_origin_timesteps = np.asarray(list(range(1, int(original_steps) + 1))) * k - 1
+        else:
+            tcd_origin_timesteps = np.asarray(list(range(0, int(self.config.num_train_timesteps))))
+        # TCD Inference Steps Schedule
+        tcd_origin_timesteps = tcd_origin_timesteps[::-1].copy()
+        # Select (approximately) evenly spaced indices from tcd_origin_timesteps.
+        inference_indices = np.linspace(0, len(tcd_origin_timesteps), num=num_inference_steps, endpoint=False)
+        inference_indices = np.floor(inference_indices).astype(np.int64)
+        timesteps = tcd_origin_timesteps[inference_indices]
+        if self.special_jump:
+            if self.tdd_train_step == 50:
+                timesteps = np.array([999., 879., 759., 499., 259.])
+            elif self.tdd_train_step == 250:
+                if num_inference_steps == 5:
+                    timesteps = np.array([999., 875., 751., 499., 251.])
+                elif num_inference_steps == 6:
+                    timesteps = np.array([999., 875., 751., 627., 499., 251.])
+                elif num_inference_steps == 7:
+                    timesteps = np.array([999., 875., 751., 627., 499., 375., 251.])
+
+        timesteps_s = np.floor((1 - eta) * timesteps).astype(np.int64)
+
+        sigmas_s = np.array(((1 - self.alphas_cumprod) / self.alphas_cumprod) ** 0.5)
+        if self.config.use_karras_sigmas:
+            print("have not write")
+            pass
+        else:
+            sigmas_s = np.interp(timesteps_s, np.arange(0, len(sigmas_s)), sigmas_s)
+  
+        if self.config.final_sigmas_type == "sigma_min":
+            sigma_last = ((1 - self.alphas_cumprod[0]) / self.alphas_cumprod[0]) ** 0.5
+        elif self.config.final_sigmas_type == "zero":
+            sigma_last = 0
+        else:
+            raise ValueError(
+                f" `final_sigmas_type` must be one of `sigma_min` or `zero`, but got {self.config.final_sigmas_type}"
+            )
+        
+        sigmas_s = np.concatenate([sigmas_s, [sigma_last]]).astype(np.float32)
+        self.sigmas_s = torch.from_numpy(sigmas_s).to(device=device)
+        self.timesteps_s = torch.from_numpy(timesteps_s).to(device=device, dtype=torch.int64)
+
+    def step(
+        self,
+        model_output: torch.FloatTensor,
+        timestep: int,
+        sample: torch.FloatTensor,
+        eta: float,
+        generator: Optional[torch.Generator] = None,
+        return_dict: bool = True,
+    ) -> Union[SchedulerOutput, Tuple]:
+        if self.num_inference_steps is None:
+            raise ValueError(
+                "Number of inference steps is 'None', you need to run 'set_timesteps' after creating the scheduler"
+            )
+
+        if self.step_index is None:
+            self._init_step_index(timestep)
+
+        if self.step_index == 0:
+            self.set_timesteps_s(eta)
+
+        model_output = self.convert_model_output(model_output, sample=sample)
+        for i in range(self.config.solver_order - 1):
+            self.model_outputs[i] = self.model_outputs[i + 1]
+        self.model_outputs[-1] = model_output
+
+        order = self.order_list[self.step_index]
+
+        #  For img2img denoising might start with order>1 which is not possible
+        #  In this case make sure that the first two steps are both order=1
+        while self.model_outputs[-order] is None:
+            order -= 1
+
+        # For single-step solvers, we use the initial value at each time with order = 1.
+        if order == 1:
+            self.sample = sample
+
+        prev_sample = self.singlestep_dpm_solver_update(self.model_outputs, sample=self.sample, order=order)
+
+        if eta > 0:
+            if self.step_index != self.num_inference_steps - 1:
+
+                alpha_prod_s = self.alphas_cumprod[self.timesteps_s[self.step_index + 1]]
+                alpha_prod_t_prev = self.alphas_cumprod[self.timesteps[self.step_index + 1]]
+
+                noise = randn_tensor(
+                    model_output.shape, generator=generator, device=model_output.device, dtype=prev_sample.dtype
+                )
+                prev_sample = (alpha_prod_t_prev / alpha_prod_s).sqrt() * prev_sample + (
+                    1 - alpha_prod_t_prev / alpha_prod_s
+                ).sqrt() * noise
+
+        # upon completion increase step index by one
+        self._step_index += 1
+
+        if not return_dict:
+            return (prev_sample,)
+
+        return SchedulerOutput(prev_sample=prev_sample)
+
+    def dpm_solver_first_order_update(
+        self,
+        model_output: torch.FloatTensor,
+        *args,
+        sample: torch.FloatTensor = None,
+        **kwargs,
+    ) -> torch.FloatTensor:
+        timestep = args[0] if len(args) > 0 else kwargs.pop("timestep", None)
+        prev_timestep = args[1] if len(args) > 1 else kwargs.pop("prev_timestep", None)
+        if sample is None:
+            if len(args) > 2:
+                sample = args[2]
+            else:
+                raise ValueError(" missing `sample` as a required keyward argument")
+        if timestep is not None:
+            deprecate(
+                "timesteps",
+                "1.0.0",
+                "Passing `timesteps` is deprecated and has no effect as model output conversion is now handled via an internal counter `self.step_index`",
+            )
+
+        if prev_timestep is not None:
+            deprecate(
+                "prev_timestep",
+                "1.0.0",
+                "Passing `prev_timestep` is deprecated and has no effect as model output conversion is now handled via an internal counter `self.step_index`",
+            )
+        sigma_t, sigma_s = self.sigmas_s[self.step_index + 1], self.sigmas[self.step_index]
+        alpha_t, sigma_t = self._sigma_to_alpha_sigma_t(sigma_t)
+        alpha_s, sigma_s = self._sigma_to_alpha_sigma_t(sigma_s)
+        lambda_t = torch.log(alpha_t) - torch.log(sigma_t)
+        lambda_s = torch.log(alpha_s) - torch.log(sigma_s)
+        h = lambda_t - lambda_s
+        if self.config.algorithm_type == "dpmsolver++":
+            x_t = (sigma_t / sigma_s) * sample - (alpha_t * (torch.exp(-h) - 1.0)) * model_output
+        elif self.config.algorithm_type == "dpmsolver":
+            x_t = (alpha_t / alpha_s) * sample - (sigma_t * (torch.exp(h) - 1.0)) * model_output
+        return x_t
+
+    def singlestep_dpm_solver_second_order_update(
+        self,
+        model_output_list: List[torch.FloatTensor],
+        *args,
+        sample: torch.FloatTensor = None,
+        **kwargs,
+    ) -> torch.FloatTensor:
+        timestep_list = args[0] if len(args) > 0 else kwargs.pop("timestep_list", None)
+        prev_timestep = args[1] if len(args) > 1 else kwargs.pop("prev_timestep", None)
+        if sample is None:
+            if len(args) > 2:
+                sample = args[2]
+            else:
+                raise ValueError(" missing `sample` as a required keyward argument")
+        if timestep_list is not None:
+            deprecate(
+                "timestep_list",
+                "1.0.0",
+                "Passing `timestep_list` is deprecated and has no effect as model output conversion is now handled via an internal counter `self.step_index`",
+            )
+
+        if prev_timestep is not None:
+            deprecate(
+                "prev_timestep",
+                "1.0.0",
+                "Passing `prev_timestep` is deprecated and has no effect as model output conversion is now handled via an internal counter `self.step_index`",
+            )
+        sigma_t, sigma_s0, sigma_s1 = (
+            self.sigmas_s[self.step_index + 1],
+            self.sigmas[self.step_index],
+            self.sigmas[self.step_index - 1],
+        )
+
+        alpha_t, sigma_t = self._sigma_to_alpha_sigma_t(sigma_t)
+        alpha_s0, sigma_s0 = self._sigma_to_alpha_sigma_t(sigma_s0)
+        alpha_s1, sigma_s1 = self._sigma_to_alpha_sigma_t(sigma_s1)
+
+        lambda_t = torch.log(alpha_t) - torch.log(sigma_t)
+        lambda_s0 = torch.log(alpha_s0) - torch.log(sigma_s0)
+        lambda_s1 = torch.log(alpha_s1) - torch.log(sigma_s1)
+
+        m0, m1 = model_output_list[-1], model_output_list[-2]
+
+        h, h_0 = lambda_t - lambda_s1, lambda_s0 - lambda_s1
+        r0 = h_0 / h
+        D0, D1 = m1, (1.0 / r0) * (m0 - m1)
+        if self.config.algorithm_type == "dpmsolver++":
+            # See https://arxiv.org/abs/2211.01095 for detailed derivations
+            if self.config.solver_type == "midpoint":
+                x_t = (
+                    (sigma_t / sigma_s1) * sample
+                    - (alpha_t * (torch.exp(-h) - 1.0)) * D0
+                    - 0.5 * (alpha_t * (torch.exp(-h) - 1.0)) * D1
+                )
+            elif self.config.solver_type == "heun":
+                x_t = (
+                    (sigma_t / sigma_s1) * sample
+                    - (alpha_t * (torch.exp(-h) - 1.0)) * D0
+                    + (alpha_t * ((torch.exp(-h) - 1.0) / h + 1.0)) * D1
+                )
+        elif self.config.algorithm_type == "dpmsolver":
+            # See https://arxiv.org/abs/2206.00927 for detailed derivations
+            if self.config.solver_type == "midpoint":
+                x_t = (
+                    (alpha_t / alpha_s1) * sample
+                    - (sigma_t * (torch.exp(h) - 1.0)) * D0
+                    - 0.5 * (sigma_t * (torch.exp(h) - 1.0)) * D1
+                )
+            elif self.config.solver_type == "heun":
+                x_t = (
+                    (alpha_t / alpha_s1) * sample
+                    - (sigma_t * (torch.exp(h) - 1.0)) * D0
+                    - (sigma_t * ((torch.exp(h) - 1.0) / h - 1.0)) * D1
+                )
+        return x_t
+
+    def singlestep_dpm_solver_update(
+        self,
+        model_output_list: List[torch.FloatTensor],
+        *args,
+        sample: torch.FloatTensor = None,
+        order: int = None,
+        **kwargs,
+    ) -> torch.FloatTensor:
+        timestep_list = args[0] if len(args) > 0 else kwargs.pop("timestep_list", None)
+        prev_timestep = args[1] if len(args) > 1 else kwargs.pop("prev_timestep", None)
+        if sample is None:
+            if len(args) > 2:
+                sample = args[2]
+            else:
+                raise ValueError(" missing`sample` as a required keyward argument")
+        if order is None:
+            if len(args) > 3:
+                order = args[3]
+            else:
+                raise ValueError(" missing `order` as a required keyward argument")
+        if timestep_list is not None:
+            deprecate(
+                "timestep_list",
+                "1.0.0",
+                "Passing `timestep_list` is deprecated and has no effect as model output conversion is now handled via an internal counter `self.step_index`",
+            )
+
+        if prev_timestep is not None:
+            deprecate(
+                "prev_timestep",
+                "1.0.0",
+                "Passing `prev_timestep` is deprecated and has no effect as model output conversion is now handled via an internal counter `self.step_index`",
+            )
+
+        if order == 1:
+            return self.dpm_solver_first_order_update(model_output_list[-1], sample=sample)
+        elif order == 2:
+            return self.singlestep_dpm_solver_second_order_update(model_output_list, sample=sample)
+        else:
+            raise ValueError(f"Order must be 1, 2, got {order}")
+
+    def convert_model_output(
+        self,
+        model_output: torch.FloatTensor,
+        *args,
+        sample: torch.FloatTensor = None,
+        **kwargs,
+    ) -> torch.FloatTensor:
+        """
+        Convert the model output to the corresponding type the DPMSolver/DPMSolver++ algorithm needs. DPM-Solver is
+        designed to discretize an integral of the noise prediction model, and DPM-Solver++ is designed to discretize an
+        integral of the data prediction model.
+
+        <Tip>
+
+        The algorithm and model type are decoupled. You can use either DPMSolver or DPMSolver++ for both noise
+        prediction and data prediction models.
+
+        </Tip>
+
+        Args:
+            model_output (`torch.FloatTensor`):
+                The direct output from the learned diffusion model.
+            sample (`torch.FloatTensor`):
+                A current instance of a sample created by the diffusion process.
+
+        Returns:
+            `torch.FloatTensor`:
+                The converted model output.
+        """
+        timestep = args[0] if len(args) > 0 else kwargs.pop("timestep", None)
+        if sample is None:
+            if len(args) > 1:
+                sample = args[1]
+            else:
+                raise ValueError("missing `sample` as a required keyward argument")
+        if timestep is not None:
+            deprecate(
+                "timesteps",
+                "1.0.0",
+                "Passing `timesteps` is deprecated and has no effect as model output conversion is now handled via an internal counter `self.step_index`",
+            )
+        # DPM-Solver++ needs to solve an integral of the data prediction model.
+        if self.config.algorithm_type == "dpmsolver++":
+            if self.config.prediction_type == "epsilon":
+                # DPM-Solver and DPM-Solver++ only need the "mean" output.
+                if self.config.variance_type in ["learned_range"]:
+                    model_output = model_output[:, :3]
+                sigma = self.sigmas[self.step_index]
+                alpha_t, sigma_t = self._sigma_to_alpha_sigma_t(sigma)
+                x0_pred = (sample - sigma_t * model_output) / alpha_t
+            elif self.config.prediction_type == "sample":
+                x0_pred = model_output
+            elif self.config.prediction_type == "v_prediction":
+                sigma = self.sigmas[self.step_index]
+                alpha_t, sigma_t = self._sigma_to_alpha_sigma_t(sigma)
+                x0_pred = alpha_t * sample - sigma_t * model_output
+            else:
+                raise ValueError(
+                    f"prediction_type given as {self.config.prediction_type} must be one of `epsilon`, `sample`, or"
+                    " `v_prediction` for the DPMSolverSinglestepScheduler."
+                )
+
+            if self.step_index <= self.t_l:
+                if self.config.thresholding:
+                    x0_pred = self._threshold_sample(x0_pred)
+
+            return x0_pred
+        # DPM-Solver needs to solve an integral of the noise prediction model.
+        elif self.config.algorithm_type == "dpmsolver":
+            if self.config.prediction_type == "epsilon":
+                # DPM-Solver and DPM-Solver++ only need the "mean" output.
+                if self.config.variance_type in ["learned_range"]:
+                    model_output = model_output[:, :3]
+                return model_output
+            elif self.config.prediction_type == "sample":
+                sigma = self.sigmas[self.step_index]
+                alpha_t, sigma_t = self._sigma_to_alpha_sigma_t(sigma)
+                epsilon = (sample - alpha_t * model_output) / sigma_t
+                return epsilon
+            elif self.config.prediction_type == "v_prediction":
+                sigma = self.sigmas[self.step_index]
+                alpha_t, sigma_t = self._sigma_to_alpha_sigma_t(sigma)
+                epsilon = alpha_t * model_output + sigma_t * sample
+                return epsilon
+            else:
+                raise ValueError(
+                    f"prediction_type given as {self.config.prediction_type} must be one of `epsilon`, `sample`, or"
+                    " `v_prediction` for the DPMSolverSinglestepScheduler."
+                )