#!/usr/bin/env python3
import argparse
import logging
import sys
from itertools import chain
from pathlib import Path
from typing import Any, List, Optional, Sequence, Tuple, Union
import humanfriendly
import numpy as np
import torch
import yaml
from tqdm import trange
from typeguard import typechecked
from espnet2.enh.diffusion_enh import ESPnetDiffusionModel
from espnet2.enh.loss.criterions.tf_domain import FrequencyDomainMSE
from espnet2.enh.loss.criterions.time_domain import SISNRLoss
from espnet2.enh.loss.wrappers.pit_solver import PITSolver
from espnet2.fileio.sound_scp import SoundScpWriter
from espnet2.tasks.enh import EnhancementTask
from espnet2.tasks.enh_s2t import EnhS2TTask
from espnet2.torch_utils.device_funcs import to_device
from espnet2.torch_utils.set_all_random_seed import set_all_random_seed
from espnet2.train.abs_espnet_model import AbsESPnetModel
from espnet2.utils import config_argparse
from espnet2.utils.types import str2bool, str2triple_str, str_or_none
from espnet.utils.cli_utils import get_commandline_args
EPS = torch.finfo(torch.get_default_dtype()).eps
[docs]def get_train_config(train_config, model_file=None):
if train_config is None:
assert model_file is not None, (
"The argument 'model_file' must be provided "
"if the argument 'train_config' is not specified."
)
train_config = Path(model_file).parent / "config.yaml"
else:
train_config = Path(train_config)
return train_config
[docs]def recursive_dict_update(dict_org, dict_patch, verbose=False, log_prefix=""):
"""Update `dict_org` with `dict_patch` in-place recursively."""
for key, value in dict_patch.items():
if key not in dict_org:
if verbose:
logging.info(
"Overwriting config: [{}{}]: None -> {}".format(
log_prefix, key, value
)
)
dict_org[key] = value
elif isinstance(value, dict):
recursive_dict_update(
dict_org[key], value, verbose=verbose, log_prefix=f"{key}."
)
else:
if verbose and dict_org[key] != value:
logging.info(
"Overwriting config: [{}{}]: {} -> {}".format(
log_prefix, key, dict_org[key], value
)
)
dict_org[key] = value
[docs]def build_model_from_args_and_file(task, args, model_file, device):
model = task.build_model(args)
if not isinstance(model, AbsESPnetModel):
raise RuntimeError(
f"model must inherit {AbsESPnetModel.__name__}, but got {type(model)}"
)
model.to(device)
if model_file is not None:
if device == "cuda":
# NOTE(kamo): "cuda" for torch.load always indicates cuda:0
# in PyTorch<=1.4
device = f"cuda:{torch.cuda.current_device()}"
model.load_state_dict(torch.load(model_file, map_location=device))
return model
[docs]class SeparateSpeech:
"""SeparateSpeech class
Examples:
>>> import soundfile
>>> separate_speech = SeparateSpeech("enh_config.yml", "enh.pth")
>>> audio, rate = soundfile.read("speech.wav")
>>> separate_speech(audio)
[separated_audio1, separated_audio2, ...]
"""
@typechecked
def __init__(
self,
train_config: Union[Path, str, None] = None,
model_file: Union[Path, str, None] = None,
inference_config: Union[Path, str, None] = None,
segment_size: Optional[float] = None,
hop_size: Optional[float] = None,
normalize_segment_scale: bool = False,
show_progressbar: bool = False,
ref_channel: Optional[int] = None,
normalize_output_wav: bool = False,
device: str = "cpu",
dtype: str = "float32",
enh_s2t_task: bool = False,
):
task = EnhancementTask if not enh_s2t_task else EnhS2TTask
# 1. Build Enh model
if inference_config is None:
enh_model, enh_train_args = task.build_model_from_file(
train_config, model_file, device
)
else:
# Overwrite model attributes
train_config = get_train_config(train_config, model_file=model_file)
with train_config.open("r", encoding="utf-8") as f:
train_args = yaml.safe_load(f)
with Path(inference_config).open("r", encoding="utf-8") as f:
infer_args = yaml.safe_load(f)
if enh_s2t_task:
arg_list = ("enh_encoder", "enh_separator", "enh_decoder")
else:
arg_list = ("encoder", "separator", "decoder")
supported_keys = list(chain(*[[k, k + "_conf"] for k in arg_list]))
for k in infer_args.keys():
if k not in supported_keys:
raise ValueError(
"Only the following top-level keys are supported: %s"
% ", ".join(supported_keys)
)
recursive_dict_update(train_args, infer_args, verbose=True)
enh_train_args = argparse.Namespace(**train_args)
enh_model = build_model_from_args_and_file(
task, enh_train_args, model_file, device
)
if enh_s2t_task:
enh_model = enh_model.enh_model
enh_model.to(dtype=getattr(torch, dtype)).eval()
self.device = device
self.dtype = dtype
self.enh_train_args = enh_train_args
self.enh_model = enh_model
# only used when processing long speech, i.e.
# segment_size is not None and hop_size is not None
self.segment_size = segment_size
self.hop_size = hop_size
self.normalize_segment_scale = normalize_segment_scale
self.normalize_output_wav = normalize_output_wav
self.show_progressbar = show_progressbar
self.num_spk = enh_model.num_spk
task = "enhancement" if self.num_spk == 1 else "separation"
# reference channel for processing multi-channel speech
if ref_channel is not None:
logging.info(
"Overwrite enh_model.separator.ref_channel with {}".format(ref_channel)
)
enh_model.separator.ref_channel = ref_channel
if hasattr(enh_model.separator, "beamformer"):
enh_model.separator.beamformer.ref_channel = ref_channel
self.ref_channel = ref_channel
else:
self.ref_channel = enh_model.ref_channel
self.segmenting = segment_size is not None and hop_size is not None
if self.segmenting:
logging.info("Perform segment-wise speech %s" % task)
logging.info(
"Segment length = {} sec, hop length = {} sec".format(
segment_size, hop_size
)
)
else:
logging.info("Perform direct speech %s on the input" % task)
@torch.no_grad()
@typechecked
def __call__(
self, speech_mix: Union[torch.Tensor, np.ndarray], fs: int = 8000, **kwargs
) -> List[Union[torch.Tensor, np.array]]:
"""Inference
Args:
speech_mix: Input speech data (Batch, Nsamples [, Channels])
fs: sample rate
Returns:
[separated_audio1, separated_audio2, ...]
"""
# Input as audio signal
if isinstance(speech_mix, np.ndarray):
speech_mix = torch.as_tensor(speech_mix)
assert speech_mix.dim() > 1, speech_mix.size()
batch_size = speech_mix.size(0)
speech_mix = speech_mix.to(getattr(torch, self.dtype))
# lengths: (B,)
lengths = speech_mix.new_full(
[batch_size], dtype=torch.long, fill_value=speech_mix.size(1)
)
# a. To device
speech_mix = to_device(speech_mix, device=self.device)
lengths = to_device(lengths, device=self.device)
###################################
# Normalize the signal variance
if getattr(self.enh_model, "normalize_variance_per_ch", False):
dim = 1
mix_std_ = torch.std(speech_mix, dim=dim, keepdim=True)
speech_mix = speech_mix / mix_std_ # RMS normalization
elif getattr(self.enh_model, "normalize_variance", False):
if speech_mix.ndim > 2:
dim = (1, 2)
else:
dim = 1
mix_std_ = torch.std(speech_mix, dim=dim, keepdim=True)
speech_mix = speech_mix / mix_std_ # RMS normalization
category = kwargs.get("utt2category", None)
if (
self.enh_model.categories
and category is not None
and category[0].item() not in self.enh_model.categories
):
raise ValueError(f"Category '{category}' is not listed in self.categories")
additional = {}
if category is not None:
cat = self.enh_model.categories[category[0].item()]
print(f"category: {cat}", flush=True)
if cat.endswith("_reverb"):
additional["mode"] = "dereverb"
else:
additional["mode"] = "no_dereverb"
if self.segmenting and lengths[0] > self.segment_size * fs:
# Segment-wise speech enhancement/separation
overlap_length = int(np.round(fs * (self.segment_size - self.hop_size)))
num_segments = int(
np.ceil((speech_mix.size(1) - overlap_length) / (self.hop_size * fs))
)
t = T = int(self.segment_size * fs)
pad_shape = speech_mix[:, :T].shape
enh_waves = []
range_ = trange if self.show_progressbar else range
for i in range_(num_segments):
st = int(i * self.hop_size * fs)
en = st + T
if en >= lengths[0]:
# en - st < T (last segment)
en = lengths[0]
speech_seg = speech_mix.new_zeros(pad_shape)
t = en - st
speech_seg[:, :t] = speech_mix[:, st:en]
else:
t = T
speech_seg = speech_mix[:, st:en] # B x T [x C]
lengths_seg = speech_mix.new_full(
[batch_size], dtype=torch.long, fill_value=T
)
# b. Enhancement/Separation Forward
feats, f_lens = self.enh_model.encoder(speech_seg, lengths_seg)
if isinstance(self.enh_model, ESPnetDiffusionModel):
feats = [self.enh_model.enhance(feats)]
else:
feats, _, _ = self.enh_model.separator(feats, f_lens, additional)
processed_wav = [
self.enh_model.decoder(f, lengths_seg)[0] for f in feats
]
if speech_seg.dim() > 2:
# multi-channel speech
speech_seg_ = speech_seg[:, self.ref_channel]
else:
speech_seg_ = speech_seg
if self.normalize_segment_scale:
# normalize the scale to match the input mixture scale
mix_energy = torch.sqrt(
torch.mean(speech_seg_[:, :t].pow(2), dim=1, keepdim=True)
)
enh_energy = torch.sqrt(
torch.mean(
sum(processed_wav)[:, :t].pow(2), dim=1, keepdim=True
)
)
processed_wav = [
w * (mix_energy / enh_energy) for w in processed_wav
]
# List[torch.Tensor(num_spk, B, T)]
enh_waves.append(torch.stack(processed_wav, dim=0))
# c. Stitch the enhanced segments together
waves = enh_waves[0]
for i in range(1, num_segments):
# permutation between separated streams in last and current segments
perm = self.cal_permumation(
waves[:, :, -overlap_length:],
enh_waves[i][:, :, :overlap_length],
criterion="si_snr",
)
# repermute separated streams in current segment
for batch in range(batch_size):
enh_waves[i][:, batch] = enh_waves[i][perm[batch], batch]
if i == num_segments - 1:
enh_waves[i][:, :, t:] = 0
enh_waves_res_i = enh_waves[i][:, :, overlap_length:t]
else:
enh_waves_res_i = enh_waves[i][:, :, overlap_length:]
# overlap-and-add (average over the overlapped part)
waves[:, :, -overlap_length:] = (
waves[:, :, -overlap_length:] + enh_waves[i][:, :, :overlap_length]
) / 2
# concatenate the residual parts of the later segment
waves = torch.cat([waves, enh_waves_res_i], dim=2)
# ensure the stitched length is same as input
assert waves.size(2) == speech_mix.size(1), (waves.shape, speech_mix.shape)
waves = torch.unbind(waves, dim=0)
else:
# b. Enhancement/Separation Forward
feats, f_lens = self.enh_model.encoder(speech_mix, lengths)
if isinstance(self.enh_model, ESPnetDiffusionModel):
feats = [self.enh_model.enhance(feats)]
else:
feats, _, _ = self.enh_model.separator(feats, f_lens, additional)
waves = [self.enh_model.decoder(f, lengths)[0] for f in feats]
###################################
# De-normalize the signal variance
if getattr(self.enh_model, "normalize_variance_per_ch", False):
if mix_std_.ndim > 2:
mix_std_ = mix_std_[:, :, self.ref_channel]
waves = [w * mix_std_ for w in waves]
elif getattr(self.enh_model, "normalize_variance", False):
if mix_std_.ndim > 2:
mix_std_ = mix_std_.squeeze(2)
waves = [w * mix_std_ for w in waves]
assert len(waves) == self.num_spk, len(waves) == self.num_spk
assert len(waves[0]) == batch_size, (len(waves[0]), batch_size)
if self.normalize_output_wav:
waves = [
(w / abs(w).max(dim=1, keepdim=True)[0] * 0.9).cpu().numpy()
for w in waves
] # list[(batch, sample)]
else:
waves = [w.cpu().numpy() for w in waves]
return waves
[docs] @torch.no_grad()
def cal_permumation(self, ref_wavs, enh_wavs, criterion="si_snr"):
"""Calculate the permutation between seaprated streams in two adjacent segments.
Args:
ref_wavs (List[torch.Tensor]): [(Batch, Nsamples)]
enh_wavs (List[torch.Tensor]): [(Batch, Nsamples)]
criterion (str): one of ("si_snr", "mse", "corr)
Returns:
perm (torch.Tensor): permutation for enh_wavs (Batch, num_spk)
"""
criterion_class = {"si_snr": SISNRLoss, "mse": FrequencyDomainMSE}[criterion]
pit_solver = PITSolver(criterion=criterion_class())
_, _, others = pit_solver(ref_wavs, enh_wavs)
perm = others["perm"]
return perm
[docs] @staticmethod
def from_pretrained(
model_tag: Optional[str] = None,
**kwargs: Optional[Any],
):
"""Build SeparateSpeech instance from the pretrained model.
Args:
model_tag (Optional[str]): Model tag of the pretrained models.
Currently, the tags of espnet_model_zoo are supported.
Returns:
SeparateSpeech: SeparateSpeech instance.
"""
if model_tag is not None:
try:
from espnet_model_zoo.downloader import ModelDownloader
except ImportError:
logging.error(
"`espnet_model_zoo` is not installed. "
"Please install via `pip install -U espnet_model_zoo`."
)
raise
d = ModelDownloader()
kwargs.update(**d.download_and_unpack(model_tag))
return SeparateSpeech(**kwargs)
[docs]def humanfriendly_or_none(value: str):
if value in ("none", "None", "NONE"):
return None
return humanfriendly.parse_size(value)
[docs]@typechecked
def inference(
output_dir: str,
batch_size: int,
dtype: str,
fs: int,
ngpu: int,
seed: int,
num_workers: int,
log_level: Union[int, str],
data_path_and_name_and_type: Sequence[Tuple[str, str, str]],
key_file: Optional[str],
train_config: Optional[str],
model_file: Optional[str],
model_tag: Optional[str],
inference_config: Optional[str],
allow_variable_data_keys: bool,
segment_size: Optional[float],
hop_size: Optional[float],
normalize_segment_scale: bool,
show_progressbar: bool,
ref_channel: Optional[int],
normalize_output_wav: bool,
enh_s2t_task: bool,
):
if batch_size > 1:
raise NotImplementedError("batch decoding is not implemented")
if ngpu > 1:
raise NotImplementedError("only single GPU decoding is supported")
logging.basicConfig(
level=log_level,
format="%(asctime)s (%(module)s:%(lineno)d) %(levelname)s: %(message)s",
)
if ngpu >= 1:
device = "cuda"
else:
device = "cpu"
# 1. Set random-seed
set_all_random_seed(seed)
# 2. Build separate_speech
separate_speech_kwargs = dict(
train_config=train_config,
model_file=model_file,
inference_config=inference_config,
segment_size=segment_size,
hop_size=hop_size,
normalize_segment_scale=normalize_segment_scale,
show_progressbar=show_progressbar,
ref_channel=ref_channel,
normalize_output_wav=normalize_output_wav,
device=device,
dtype=dtype,
enh_s2t_task=enh_s2t_task,
)
separate_speech = SeparateSpeech.from_pretrained(
model_tag=model_tag,
**separate_speech_kwargs,
)
# 3. Build data-iterator
loader = EnhancementTask.build_streaming_iterator(
data_path_and_name_and_type,
dtype=dtype,
batch_size=batch_size,
key_file=key_file,
num_workers=num_workers,
preprocess_fn=EnhancementTask.build_preprocess_fn(
separate_speech.enh_train_args, False
),
collate_fn=EnhancementTask.build_collate_fn(
separate_speech.enh_train_args, False
),
allow_variable_data_keys=allow_variable_data_keys,
inference=True,
)
# 4. Start for-loop
output_dir: Path = Path(output_dir).expanduser().resolve()
writers = []
for i in range(separate_speech.num_spk):
writers.append(
SoundScpWriter(f"{output_dir}/wavs/{i + 1}", f"{output_dir}/spk{i + 1}.scp")
)
import tqdm
for i, (keys, batch) in tqdm.tqdm(enumerate(loader)):
logging.info(f"[{i}] Enhancing {keys}")
assert isinstance(batch, dict), type(batch)
assert all(isinstance(s, str) for s in keys), keys
_bs = len(next(iter(batch.values())))
assert len(keys) == _bs, f"{len(keys)} != {_bs}"
batch = {k: v for k, v in batch.items() if not k.endswith("_lengths")}
waves = separate_speech(**batch, fs=fs)
for spk, w in enumerate(waves):
for b in range(batch_size):
writers[spk][keys[b]] = fs, w[b]
for writer in writers:
writer.close()
[docs]def get_parser():
parser = config_argparse.ArgumentParser(
description="Frontend inference",
formatter_class=argparse.ArgumentDefaultsHelpFormatter,
)
# Note(kamo): Use '_' instead of '-' as separator.
# '-' is confusing if written in yaml.
parser.add_argument(
"--log_level",
type=lambda x: x.upper(),
default="INFO",
choices=("CRITICAL", "ERROR", "WARNING", "INFO", "DEBUG", "NOTSET"),
help="The verbose level of logging",
)
parser.add_argument("--output_dir", type=str, required=True)
parser.add_argument(
"--ngpu",
type=int,
default=0,
help="The number of gpus. 0 indicates CPU mode",
)
parser.add_argument("--seed", type=int, default=0, help="Random seed")
parser.add_argument(
"--dtype",
default="float32",
choices=["float16", "float32", "float64"],
help="Data type",
)
parser.add_argument(
"--fs", type=humanfriendly_or_none, default=8000, help="Sampling rate"
)
parser.add_argument(
"--num_workers",
type=int,
default=1,
help="The number of workers used for DataLoader",
)
group = parser.add_argument_group("Input data related")
group.add_argument(
"--data_path_and_name_and_type",
type=str2triple_str,
required=True,
action="append",
)
group.add_argument("--key_file", type=str_or_none)
group.add_argument("--allow_variable_data_keys", type=str2bool, default=False)
group = parser.add_argument_group("Output data related")
group.add_argument(
"--normalize_output_wav",
type=str2bool,
default=False,
help="Whether to normalize the predicted wav to [-1~1]",
)
group = parser.add_argument_group("The model configuration related")
group.add_argument(
"--train_config",
type=str,
help="Training configuration file",
)
group.add_argument(
"--model_file",
type=str,
help="Model parameter file",
)
group.add_argument(
"--model_tag",
type=str,
help="Pretrained model tag. If specify this option, train_config and "
"model_file will be overwritten",
)
group.add_argument(
"--inference_config",
type=str_or_none,
default=None,
help="Optional configuration file for overwriting enh model attributes "
"during inference",
)
group.add_argument(
"--enh_s2t_task",
type=str2bool,
default=False,
help="enhancement and asr joint model",
)
group = parser.add_argument_group("Data loading related")
group.add_argument(
"--batch_size",
type=int,
default=1,
help="The batch size for inference",
)
group = parser.add_argument_group("SeparateSpeech related")
group.add_argument(
"--segment_size",
type=float,
default=None,
help="Segment length in seconds for segment-wise speech enhancement/separation",
)
group.add_argument(
"--hop_size",
type=float,
default=None,
help="Hop length in seconds for segment-wise speech enhancement/separation",
)
group.add_argument(
"--normalize_segment_scale",
type=str2bool,
default=True,
help="Whether to normalize the energy of the separated streams in each segment",
)
group.add_argument(
"--show_progressbar",
type=str2bool,
default=False,
help="Whether to show a progress bar when performing segment-wise speech "
"enhancement/separation",
)
group.add_argument(
"--ref_channel",
type=int,
default=None,
help="If not None, this will overwrite the ref_channel defined in the "
"separator module (for multi-channel speech processing)",
)
return parser
[docs]def main(cmd=None):
print(get_commandline_args(), file=sys.stderr)
parser = get_parser()
args = parser.parse_args(cmd)
kwargs = vars(args)
kwargs.pop("config", None)
inference(**kwargs)
if __name__ == "__main__":
main()