wehub-resource-sync
95 lines
2.9 KiB
Python
95 lines
2.9 KiB
Python
#
|
|
# SPDX-FileCopyrightText: Copyright (c) 1993-2024 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
|
|
# SPDX-License-Identifier: Apache-2.0
|
|
#
|
|
# 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 pathlib import Path
|
|
|
|
from polygraphy import mod, util
|
|
from polygraphy.mod.trt_importer import lazy_import_trt
|
|
from polygraphy.logger import G_LOGGER
|
|
|
|
trt = lazy_import_trt()
|
|
|
|
@mod.export()
|
|
def FileReader(
|
|
filepath,
|
|
BaseClass=None,
|
|
):
|
|
"""
|
|
Class that supplies data to TensorRT from a stream. This may help reduce memory usage during deserialization.
|
|
|
|
Args:
|
|
filepath (str):
|
|
The path to the serialized file.
|
|
|
|
"""
|
|
BaseClass = util.default(BaseClass, trt.IStreamReader)
|
|
|
|
class FileReaderClass(BaseClass):
|
|
"""
|
|
Class that supplies data to TensorRT from a stream. This may help reduce memory usage during deserialization.
|
|
"""
|
|
|
|
def __init__(self):
|
|
# Must explicitly initialize parent for any trampoline class! Will mysteriously segfault without this.
|
|
BaseClass.__init__(self) # type: ignore
|
|
|
|
self.filepath = filepath
|
|
|
|
if not Path(self.filepath).exists():
|
|
G_LOGGER.error(f"File at {self.filepath} does not exist!")
|
|
|
|
self.mode = 'rb'
|
|
self.file = open(self.filepath, self.mode)
|
|
if not self.file:
|
|
G_LOGGER.error(f"Failed to open file at {self.filepath}!")
|
|
|
|
self.make_func = FileReader
|
|
|
|
def read(self, size: int) -> bytes:
|
|
return self.file.read(size)
|
|
|
|
def seek(self, offset: int, whence: int = 0) -> int:
|
|
"""
|
|
Seek to a position in the stream. Required for IStreamReaderV2.
|
|
|
|
Args:
|
|
offset: The offset to seek to
|
|
whence: How to interpret the offset (0=absolute, 1=relative to current, 2=relative to end)
|
|
|
|
Returns:
|
|
The new absolute position
|
|
"""
|
|
return self.file.seek(offset, whence)
|
|
|
|
def free(self):
|
|
if self.file:
|
|
self.file.close()
|
|
|
|
def __enter__(self):
|
|
return self
|
|
|
|
def __exit__(self, exc_type, exc_value, traceback):
|
|
self.free()
|
|
|
|
def __repr__(self):
|
|
return util.make_repr(
|
|
"FileReader",
|
|
self.filepath,
|
|
BaseClass=BaseClass,
|
|
)[0]
|
|
|
|
return FileReaderClass()
|