mirror of
https://github.com/Anjok07/ultimatevocalremovergui.git
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149 lines
4.3 KiB
Python
149 lines
4.3 KiB
Python
# Copyright (c) Facebook, Inc. and its affiliates.
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# All rights reserved.
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#
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# This source code is licensed under the license found in the
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# LICENSE file in the root directory of this source tree.
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"""
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Utilities to save and load models.
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"""
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from contextlib import contextmanager
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import functools
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import hashlib
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import inspect
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import io
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from pathlib import Path
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import warnings
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from omegaconf import OmegaConf
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from diffq import DiffQuantizer, UniformQuantizer, restore_quantized_state
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import torch
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def get_quantizer(model, args, optimizer=None):
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"""Return the quantizer given the XP quantization args."""
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quantizer = None
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if args.diffq:
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quantizer = DiffQuantizer(
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model, min_size=args.min_size, group_size=args.group_size)
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if optimizer is not None:
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quantizer.setup_optimizer(optimizer)
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elif args.qat:
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quantizer = UniformQuantizer(
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model, bits=args.qat, min_size=args.min_size)
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return quantizer
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def load_model(path_or_package, strict=False):
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"""Load a model from the given serialized model, either given as a dict (already loaded)
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or a path to a file on disk."""
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if isinstance(path_or_package, dict):
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package = path_or_package
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elif isinstance(path_or_package, (str, Path)):
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with warnings.catch_warnings():
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warnings.simplefilter("ignore")
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path = path_or_package
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package = torch.load(path, 'cpu')
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else:
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raise ValueError(f"Invalid type for {path_or_package}.")
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klass = package["klass"]
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args = package["args"]
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kwargs = package["kwargs"]
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if strict:
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model = klass(*args, **kwargs)
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else:
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sig = inspect.signature(klass)
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for key in list(kwargs):
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if key not in sig.parameters:
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warnings.warn("Dropping inexistant parameter " + key)
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del kwargs[key]
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model = klass(*args, **kwargs)
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state = package["state"]
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set_state(model, state)
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return model
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def get_state(model, quantizer, half=False):
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"""Get the state from a model, potentially with quantization applied.
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If `half` is True, model are stored as half precision, which shouldn't impact performance
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but half the state size."""
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if quantizer is None:
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dtype = torch.half if half else None
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state = {k: p.data.to(device='cpu', dtype=dtype) for k, p in model.state_dict().items()}
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else:
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state = quantizer.get_quantized_state()
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state['__quantized'] = True
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return state
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def set_state(model, state, quantizer=None):
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"""Set the state on a given model."""
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if state.get('__quantized'):
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if quantizer is not None:
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quantizer.restore_quantized_state(model, state['quantized'])
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else:
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restore_quantized_state(model, state)
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else:
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model.load_state_dict(state)
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return state
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def save_with_checksum(content, path):
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"""Save the given value on disk, along with a sha256 hash.
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Should be used with the output of either `serialize_model` or `get_state`."""
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buf = io.BytesIO()
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torch.save(content, buf)
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sig = hashlib.sha256(buf.getvalue()).hexdigest()[:8]
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path = path.parent / (path.stem + "-" + sig + path.suffix)
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path.write_bytes(buf.getvalue())
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def serialize_model(model, training_args, quantizer=None, half=True):
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args, kwargs = model._init_args_kwargs
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klass = model.__class__
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state = get_state(model, quantizer, half)
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return {
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'klass': klass,
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'args': args,
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'kwargs': kwargs,
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'state': state,
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'training_args': OmegaConf.to_container(training_args, resolve=True),
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}
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def copy_state(state):
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return {k: v.cpu().clone() for k, v in state.items()}
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@contextmanager
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def swap_state(model, state):
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"""
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Context manager that swaps the state of a model, e.g:
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# model is in old state
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with swap_state(model, new_state):
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# model in new state
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# model back to old state
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"""
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old_state = copy_state(model.state_dict())
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model.load_state_dict(state, strict=False)
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try:
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yield
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finally:
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model.load_state_dict(old_state)
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def capture_init(init):
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@functools.wraps(init)
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def __init__(self, *args, **kwargs):
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self._init_args_kwargs = (args, kwargs)
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init(self, *args, **kwargs)
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return __init__
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