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| from typing import Any, Callable, Dict | |
| import random | |
| import lightning.pytorch as pl | |
| import torch | |
| import torch.nn as nn | |
| import torch.optim as optim | |
| from torch.optim.lr_scheduler import LambdaLR | |
| class AudioSep(pl.LightningModule): | |
| def __init__( | |
| self, | |
| ss_model: nn.Module, | |
| waveform_mixer, | |
| query_encoder, | |
| loss_function, | |
| optimizer_type: str, | |
| learning_rate: float, | |
| lr_lambda_func, | |
| use_text_ratio=1.0, | |
| ): | |
| r"""Pytorch Lightning wrapper of PyTorch model, including forward, | |
| optimization of model, etc. | |
| Args: | |
| ss_model: nn.Module | |
| anchor_segment_detector: nn.Module | |
| loss_function: function or object | |
| learning_rate: float | |
| lr_lambda: function | |
| """ | |
| super().__init__() | |
| self.ss_model = ss_model | |
| self.waveform_mixer = waveform_mixer | |
| self.query_encoder = query_encoder | |
| self.query_encoder_type = self.query_encoder.encoder_type | |
| self.use_text_ratio = use_text_ratio | |
| self.loss_function = loss_function | |
| self.optimizer_type = optimizer_type | |
| self.learning_rate = learning_rate | |
| self.lr_lambda_func = lr_lambda_func | |
| def forward(self, x): | |
| pass | |
| def training_step(self, batch_data_dict, batch_idx): | |
| r"""Forward a mini-batch data to model, calculate loss function, and | |
| train for one step. A mini-batch data is evenly distributed to multiple | |
| devices (if there are) for parallel training. | |
| Args: | |
| batch_data_dict: e.g. | |
| 'audio_text': { | |
| 'text': ['a sound of dog', ...] | |
| 'waveform': (batch_size, 1, samples) | |
| } | |
| batch_idx: int | |
| Returns: | |
| loss: float, loss function of this mini-batch | |
| """ | |
| # [important] fix random seeds across devices | |
| random.seed(batch_idx) | |
| batch_audio_text_dict = batch_data_dict['audio_text'] | |
| batch_text = batch_audio_text_dict['text'] | |
| batch_audio = batch_audio_text_dict['waveform'] | |
| device = batch_audio.device | |
| mixtures, segments = self.waveform_mixer( | |
| waveforms=batch_audio | |
| ) | |
| # calculate text embed for audio-text data | |
| if self.query_encoder_type == 'CLAP': | |
| conditions = self.query_encoder.get_query_embed( | |
| modality='hybird', | |
| text=batch_text, | |
| audio=segments.squeeze(1), | |
| use_text_ratio=self.use_text_ratio, | |
| ) | |
| input_dict = { | |
| 'mixture': mixtures[:, None, :].squeeze(1), | |
| 'condition': conditions, | |
| } | |
| target_dict = { | |
| 'segment': segments.squeeze(1), | |
| } | |
| self.ss_model.train() | |
| sep_segment = self.ss_model(input_dict)['waveform'] | |
| sep_segment = sep_segment.squeeze() | |
| # (batch_size, 1, segment_samples) | |
| output_dict = { | |
| 'segment': sep_segment, | |
| } | |
| # Calculate loss. | |
| loss = self.loss_function(output_dict, target_dict) | |
| self.log_dict({"train_loss": loss}) | |
| return loss | |
| def test_step(self, batch, batch_idx): | |
| pass | |
| def configure_optimizers(self): | |
| r"""Configure optimizer. | |
| """ | |
| if self.optimizer_type == "AdamW": | |
| optimizer = optim.AdamW( | |
| params=self.ss_model.parameters(), | |
| lr=self.learning_rate, | |
| betas=(0.9, 0.999), | |
| eps=1e-08, | |
| weight_decay=0.0, | |
| amsgrad=True, | |
| ) | |
| else: | |
| raise NotImplementedError | |
| scheduler = LambdaLR(optimizer, self.lr_lambda_func) | |
| output_dict = { | |
| "optimizer": optimizer, | |
| "lr_scheduler": { | |
| 'scheduler': scheduler, | |
| 'interval': 'step', | |
| 'frequency': 1, | |
| } | |
| } | |
| return output_dict | |
| def get_model_class(model_type): | |
| if model_type == 'ResUNet30': | |
| from models.resunet import ResUNet30 | |
| return ResUNet30 | |
| else: | |
| raise NotImplementedError | |