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#!/usr/bin/env python3
# Copyright 2023 (authors: Feiteng Li)
#
# See ../../../../LICENSE for clarification regarding multiple authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from typing import Dict, List, Tuple, Union
import matplotlib.pyplot as plt
import numpy as np
import torch
def visualize(
predicts: Tuple[torch.Tensor],
batch: Dict[str, Union[List, torch.Tensor]],
output_dir: str,
limit: int = 4,
) -> None:
text_tokens = batch["text_tokens"].to("cpu").detach().numpy()
text_tokens_lens = batch["text_tokens_lens"].to("cpu").detach().numpy()
audio_features = batch["audio_features"].to("cpu").detach().numpy()
audio_features_lens = (
batch["audio_features_lens"].to("cpu").detach().numpy()
)
assert text_tokens.ndim == 2
utt_ids, texts = batch["utt_id"], batch["text"]
encoder_outputs = predicts[0].to("cpu").type(torch.float32).detach().numpy()
decoder_outputs = predicts[1]
if isinstance(decoder_outputs, list):
decoder_outputs = decoder_outputs[-1]
decoder_outputs = (
decoder_outputs.to("cpu").type(torch.float32).detach().numpy()
)
vmin, vmax = 0, 1024 # Encodec
if decoder_outputs.dtype == np.float32:
vmin, vmax = -6, 0 # Fbank
num_figures = 3
for b, (utt_id, text) in enumerate(zip(utt_ids[:limit], texts[:limit])):
_ = plt.figure(figsize=(14, 8 * num_figures))
S = text_tokens_lens[b]
T = audio_features_lens[b]
# encoder
plt.subplot(num_figures, 1, 1)
plt.title(f"Text: {text}")
plt.imshow(
X=np.transpose(encoder_outputs[b]),
cmap=plt.get_cmap("jet"),
aspect="auto",
interpolation="nearest",
)
plt.gca().invert_yaxis()
plt.axvline(x=S - 0.4, linewidth=2, color="r")
plt.xlabel("Encoder Output")
plt.colorbar()
# decoder
plt.subplot(num_figures, 1, 2)
plt.imshow(
X=np.transpose(decoder_outputs[b]),
cmap=plt.get_cmap("jet"),
aspect="auto",
interpolation="nearest",
vmin=vmin,
vmax=vmax,
)
plt.gca().invert_yaxis()
plt.axvline(x=T - 0.4, linewidth=2, color="r")
plt.xlabel("Decoder Output")
plt.colorbar()
# target
plt.subplot(num_figures, 1, 3)
plt.imshow(
X=np.transpose(audio_features[b]),
cmap=plt.get_cmap("jet"),
aspect="auto",
interpolation="nearest",
vmin=vmin,
vmax=vmax,
)
plt.gca().invert_yaxis()
plt.axvline(x=T - 0.4, linewidth=2, color="r")
plt.xlabel("Decoder Target")
plt.colorbar()
plt.savefig(f"{output_dir}/{utt_id}.png")
plt.close()
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