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| # Copyright (c) 2023 Amphion. | |
| # | |
| # This source code is licensed under the MIT license found in the | |
| # LICENSE file in the root directory of this source tree. | |
| import torch | |
| from diffusers import DDIMScheduler, DDPMScheduler, PNDMScheduler | |
| from models.svc.base import SVCInference | |
| from models.svc.diffusion.diffusion_inference_pipeline import DiffusionInferencePipeline | |
| from models.svc.diffusion.diffusion_wrapper import DiffusionWrapper | |
| from modules.encoder.condition_encoder import ConditionEncoder | |
| class DiffusionInference(SVCInference): | |
| def __init__(self, args=None, cfg=None, infer_type="from_dataset"): | |
| SVCInference.__init__(self, args, cfg, infer_type) | |
| settings = { | |
| **cfg.model.diffusion.scheduler_settings, | |
| **cfg.inference.diffusion.scheduler_settings, | |
| } | |
| settings.pop("num_inference_timesteps") | |
| if cfg.inference.diffusion.scheduler.lower() == "ddpm": | |
| self.scheduler = DDPMScheduler(**settings) | |
| self.logger.info("Using DDPM scheduler.") | |
| elif cfg.inference.diffusion.scheduler.lower() == "ddim": | |
| self.scheduler = DDIMScheduler(**settings) | |
| self.logger.info("Using DDIM scheduler.") | |
| elif cfg.inference.diffusion.scheduler.lower() == "pndm": | |
| self.scheduler = PNDMScheduler(**settings) | |
| self.logger.info("Using PNDM scheduler.") | |
| else: | |
| raise NotImplementedError( | |
| "Unsupported scheduler type: {}".format( | |
| cfg.inference.diffusion.scheduler.lower() | |
| ) | |
| ) | |
| self.pipeline = DiffusionInferencePipeline( | |
| self.model[1], | |
| self.scheduler, | |
| cfg.inference.diffusion.scheduler_settings.num_inference_timesteps, | |
| ) | |
| def _build_model(self): | |
| self.cfg.model.condition_encoder.f0_min = self.cfg.preprocess.f0_min | |
| self.cfg.model.condition_encoder.f0_max = self.cfg.preprocess.f0_max | |
| self.condition_encoder = ConditionEncoder(self.cfg.model.condition_encoder) | |
| self.acoustic_mapper = DiffusionWrapper(self.cfg) | |
| model = torch.nn.ModuleList([self.condition_encoder, self.acoustic_mapper]) | |
| return model | |
| def _inference_each_batch(self, batch_data): | |
| device = self.accelerator.device | |
| for k, v in batch_data.items(): | |
| batch_data[k] = v.to(device) | |
| conditioner = self.model[0](batch_data) | |
| noise = torch.randn_like(batch_data["mel"], device=device) | |
| y_pred = self.pipeline(noise, conditioner) | |
| return y_pred | |