# Copyright 2021 Facebook. All rights reserved.
#
# 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.
# This code is modified by Zilliz.
import math
[docs]def round_width(width, multiplier, min_width=8, divisor=8, ceil=False):
"""
Round width of filters based on width multiplier
Args:
width ('int'):
The channel dimensions of the input.
multiplier ('float'):
The multiplication factor.
min_width ('int'):
The minimum width after multiplication.
divisor ('int'):
The new width should be dividable by divisor.
ceil ('bool'):
If True, use ceiling as the rounding method.
"""
if not multiplier:
return width
width *= multiplier
min_width = min_width or divisor
if ceil:
width_out = max(min_width, int(math.ceil(width / divisor)) * divisor)
else:
width_out = max(min_width, int(width + divisor / 2) // divisor * divisor)
if width_out < 0.9 * width:
width_out += divisor
return int(width_out)
