init commit for the EEG setup

egs/tokenizer/CODEC/encodec/encodec.py

@@ -26,6 +26,7 @@ from loss import (
     FeatureLoss,
     GeneratorAdversarialLoss,
     MelSpectrogramReconstructionLoss,
+    SpectrogramReconstructionLoss,
     WavReconstructionLoss,
 )
 from torch import nn
@@ -79,7 +80,7 @@ class Encodec(nn.Module):
         )
         self.feature_match_loss = FeatureLoss()
         self.wav_reconstruction_loss = WavReconstructionLoss()
-        self.mel_reconstruction_loss = MelSpectrogramReconstructionLoss(
+        self.spec_reconstruction_loss = SpectrogramReconstructionLoss(
             sampling_rate=self.sampling_rate
         )
 
@@ -170,7 +171,7 @@ class Encodec(nn.Module):
             wav_reconstruction_loss = self.wav_reconstruction_loss(
                 x=speech, x_hat=speech_hat
             )
-            mel_reconstruction_loss = self.mel_reconstruction_loss(
+            mel_reconstruction_loss = self.spec_reconstruction_loss(
                 x=speech, x_hat=speech_hat
             )
 

egs/tokenizer/CODEC/encodec/loss.py

@@ -14,7 +14,7 @@ from typing import List, Tuple, Union
 
 import torch
 import torch.nn.functional as F
-from torchaudio.transforms import MelSpectrogram
+from torchaudio.transforms import MelSpectrogram, Spectrogram
 
 
 class GeneratorAdversarialLoss(torch.nn.Module):
@@ -295,6 +295,80 @@ class MelSpectrogramReconstructionLoss(torch.nn.Module):
         return mel_loss
 
 
+class SpectrogramReconstructionLoss(torch.nn.Module):
+    """Spec Reconstruction loss designed for EEG signals."""
+
+    def __init__(
+        self,
+        sampling_rate: int = 22050,
+        return_spec: bool = False,
+    ):
+        super().__init__()
+        self.wav_to_specs = []
+        for i in range(5, 10):
+            s = 2**i // 8
+            self.wav_to_specs.append(
+                Spectrogram(
+                    sample_rate=sampling_rate,
+                    n_fft=s,
+                    win_length=s,
+                    hop_length=s // 4,
+                    normalized=True,
+                    center=False,
+                    pad_mode=None,
+                    power=None,
+                )
+            )
+        self.return_mel = return_spec
+
+    def forward(
+        self,
+        x_hat: torch.Tensor,
+        x: torch.Tensor,
+    ) -> Union[torch.Tensor, Tuple[torch.Tensor, Tuple[torch.Tensor, torch.Tensor]]]:
+        """Calculate Mel-spectrogram loss.
+
+        Args:
+            x_hat (Tensor): Generated waveform tensor (B, 1, T).
+            x (Tensor): Groundtruth waveform tensor (B, 1, T).
+            spec (Optional[Tensor]): Groundtruth linear amplitude spectrum tensor
+                (B, T, n_fft // 2 + 1).  if provided, use it instead of groundtruth
+                waveform.
+
+        Returns:
+            Tensor: Mel-spectrogram loss value.
+
+        """
+        mel_loss = 0.0
+
+        for i, wav_to_spec in enumerate(self.wav_to_specs):
+            s = 2 ** (i + 5)
+            wav_to_spec.to(x.device)
+
+            mel_hat = wav_to_spec(x_hat.squeeze(1))
+            mel = wav_to_spec(x.squeeze(1))
+
+            mel_loss += (
+                F.l1_loss(mel_hat, mel, reduce=True, reduction="mean")
+                + (
+                    (
+                        (torch.log(mel.abs() + 1e-7) - torch.log(mel_hat.abs() + 1e-7))
+                        ** 2
+                    ).mean(dim=-2)
+                    ** 0.5
+                ).mean()
+            )
+
+        # mel_hat = self.wav_to_spec(x_hat.squeeze(1))
+        # mel = self.wav_to_spec(x.squeeze(1))
+        # mel_loss = F.l1_loss(mel_hat, mel) + F.mse_loss(mel_hat, mel)
+
+        if self.return_mel:
+            return mel_loss, (mel_hat, mel)
+
+        return mel_loss
+
+
 class WavReconstructionLoss(torch.nn.Module):
     """Wav Reconstruction loss."""
 

egs/tokenizer/CODEC/encodec/train.py

@@ -32,13 +32,14 @@ import torch.nn as nn
 from codec_datamodule import CodecDataModule
 from encodec import Encodec
 from lhotse.utils import fix_random_seed
+from PIL import Image
 from scheduler import WarmupCosineLrScheduler
 from torch import nn
 from torch.cuda.amp import GradScaler, autocast
 from torch.nn.parallel import DistributedDataParallel as DDP
 from torch.optim import Optimizer
 from torch.utils.tensorboard import SummaryWriter
-from utils import MetricsTracker, save_checkpoint
+from utils import MetricsTracker, plot_curve, plot_feature, save_checkpoint
 
 from icefall import diagnostics
 from icefall.checkpoint import load_checkpoint
@@ -155,6 +156,20 @@ def get_parser():
         help="Whether to use half precision training.",
     )
 
+    parser.add_argument(
+        "--sampling-rate",
+        type=int,
+        default=128,
+        help="The sampling rate of the biomarker.",
+    )
+
+    parser.add_argument(
+        "--chunk-size",
+        type=int,
+        default=180,
+        help="The chunk size of the biomarker (in second).",
+    )
+
     return parser
 
 
@@ -202,8 +217,7 @@ def get_params() -> AttributeDict:
             "log_interval": 50,
             "valid_interval": 200,
             "env_info": get_env_info(),
-            "sampling_rate": 24000,
+            "wave_normalization": False,
-            "audio_normalization": False,
             "lambda_adv": 3.0,  # loss scaling coefficient for adversarial loss
             "lambda_wav": 0.1,  # loss scaling coefficient for waveform loss
             "lambda_feat": 4.0,  # loss scaling coefficient for feat loss
@@ -352,27 +366,27 @@ def prepare_input(
     is_training: bool = True,
 ):
     """Parse batch data"""
-    audio = batch["audio"].to(device, memory_format=torch.contiguous_format)
+    wave = batch["audio"].to(device, memory_format=torch.contiguous_format)
     features = batch["features"].to(device, memory_format=torch.contiguous_format)
-    audio_lens = batch["audio_lens"].to(device)
+    wave_lens = batch["audio_lens"].to(device)
     features_lens = batch["features_lens"].to(device)
 
     if is_training:
-        audio_dims = audio.size(-1)
+        audio_dims = wave.size(-1)
         start_idx = random.randint(0, max(0, audio_dims - params.sampling_rate))
-        audio = audio[:, start_idx : params.sampling_rate + start_idx]
+        wave = wave[:, start_idx : params.sampling_rate + start_idx]
     else:
         # NOTE(zengrui): a very coarse setup
-        audio = audio[
+        wave = wave[
             :, params.sampling_rate : params.sampling_rate + params.sampling_rate
         ]
 
-    if params.audio_normalization:
+    if params.wave_normalization:
-        mean = audio.mean(dim=-1, keepdim=True)
+        mean = wave.mean(dim=-1, keepdim=True)
-        std = audio.std(dim=-1, keepdim=True)
+        std = wave.std(dim=-1, keepdim=True)
-        audio = (audio - mean) / (std + 1e-7)
+        wave = (wave - mean) / (std + 1e-7)
 
-    return audio, audio_lens, features, features_lens
+    return wave, wave_lens, features, features_lens
 
 
 def train_discriminator(weight, global_step, threshold=0, value=0.0):
@@ -623,17 +637,29 @@ def train_one_epoch(
                     if speech_hat_i.dim() > 1:
                         speech_hat_i = speech_hat_i.squeeze(0)
                         speech_i = speech_i.squeeze(0)
-                    tb_writer.add_audio(
+                    # tb_writer.add_audio(
-                        f"train/speech_hat_",
+                    #     f"train/speech_hat_",
-                        speech_hat_i,
+                    #     speech_hat_i,
+                    #     params.batch_idx_train,
+                    #     params.sampling_rate,
+                    # )
+                    # tb_writer.add_audio(
+                    #     f"train/speech_",
+                    #     speech_i,
+                    #     params.batch_idx_train,
+                    #     params.sampling_rate,
+                    # )
+                    tb_writer.add_image(
+                        "train/speech_hat_",
+                        np.array(Image.open(plot_curve(speech_hat_i, params.sampling_rate))),
                         params.batch_idx_train,
-                        params.sampling_rate,
+                        dataformats="HWC",
                     )
-                    tb_writer.add_audio(
+                    tb_writer.add_image(
-                        f"train/speech_",
+                        "train/speech_",
-                        speech_i,
+                        np.array(Image.open(plot_curve(speech_i, params.sampling_rate))),
                         params.batch_idx_train,
-                        params.sampling_rate,
+                        dataformats="HWC",
                     )
                     # tb_writer.add_image(
                     #     "train/mel_hat_",
@@ -675,18 +701,31 @@ def train_one_epoch(
                     if speech_hat_i.dim() > 1:
                         speech_hat_i = speech_hat_i.squeeze(0)
                         speech_i = speech_i.squeeze(0)
-                    tb_writer.add_audio(
+                    # tb_writer.add_audio(
+                    #     f"train/valid_speech_hat_{index}",
+                    #     speech_hat_i,
+                    #     params.batch_idx_train,
+                    #     params.sampling_rate,
+                    # )
+                    # tb_writer.add_audio(
+                    #     f"train/valid_speech_{index}",
+                    #     speech_i,
+                    #     params.batch_idx_train,
+                    #     params.sampling_rate,
+                    # )
+                    tb_writer.add_image(
                         f"train/valid_speech_hat_{index}",
-                        speech_hat_i,
+                        np.array(Image.open(plot_curve(speech_hat_i, params.sampling_rate))),
                         params.batch_idx_train,
-                        params.sampling_rate,
+                        dataformats="HWC",
                     )
-                    tb_writer.add_audio(
+                    tb_writer.add_image(
                         f"train/valid_speech_{index}",
-                        speech_i,
+                        np.array(Image.open(plot_curve(speech_i, params.sampling_rate))),
                         params.batch_idx_train,
-                        params.sampling_rate,
+                        dataformats="HWC",
                     )
+                    
 
     loss_value = tot_loss["generator_loss"] / tot_loss["samples"]
     params.train_loss = loss_value
@@ -1164,11 +1203,19 @@ def run(rank, world_size, args):
         cleanup_dist()
 
 
+def override_sampling_rate(args) -> int:
+    logging.info(
+        f"Overriding sampling rate from {args.sampling_rate} to {args.sampling_rate * args.chunk_size}"
+    )
+    return int(args.sampling_rate * args.chunk_size)
+
+
 def main():
     parser = get_parser()
     CodecDataModule.add_arguments(parser)
     args = parser.parse_args()
     args.exp_dir = Path(args.exp_dir)
+    args.sampling_rate = override_sampling_rate(args)
 
     world_size = args.world_size
     assert world_size >= 1

egs/tokenizer/CODEC/encodec/utils.py

@@ -118,6 +118,20 @@ def plot_feature(spectrogram):
     plt.close()
     return data
 
+def plot_curve(speech: torch.Tensor, sampling_rate: int) -> bytes:
+    import io
+
+    import matplotlib.pyplot as plt
+    import numpy as np
+
+    plt.figure()
+    plt.plot(np.arange(sampling_rate) / sampling_rate, speech.detach().cpu().numpy().T)
+    buf = io.BytesIO()
+    plt.savefig(buf, format="jpeg")
+    buf.seek(0)
+    plt.close()
+    return buf
+
 
 class MetricsTracker(collections.defaultdict):
     def __init__(self):