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# Copyright (C) 2020 Arm Limited or its 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
#
# 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.
# Description:
# Defines the class Shape4D.
from collections import namedtuple
from .numeric_util import full_shape
from .numeric_util import round_up_divide
class Shape4D(namedtuple("Shape4D", ["batch", "height", "width", "depth"])):
"""
4D Shape (in NHWC format)
"""
def __new__(cls, n=1, h=1, w=1, c=1):
assert n is not None
if isinstance(n, list):
assert h == 1 and w == 1 and c == 1
tmp = full_shape(4, n, 1)
self = super(Shape4D, cls).__new__(cls, tmp[0], tmp[1], tmp[2], tmp[3])
else:
self = super(Shape4D, cls).__new__(cls, n, h, w, c)
return self
@classmethod
def from_list(cls, shape, base=1):
tmp = full_shape(4, shape, base)
return cls(tmp[0], tmp[1], tmp[2], tmp[3])
@classmethod
def from_hwc(cls, h, w, c):
return cls(1, h, w, c)
def with_batch(self, new_batch):
return Shape4D(new_batch, self.height, self.width, self.depth)
def with_height(self, new_height):
return Shape4D(self.batch, new_height, self.width, self.depth)
def with_width(self, new_width):
return Shape4D(self.batch, self.height, new_width, self.depth)
def with_hw(self, new_height, new_width):
return Shape4D(self.batch, new_height, new_width, self.depth)
def with_depth(self, new_depth):
return Shape4D(self.batch, self.height, self.width, new_depth)
def add(self, n, h, w, c):
return Shape4D(self.batch + n, self.height + h, self.width + w, self.depth + c)
def __add__(self, rhs):
return Shape4D(self.batch + rhs.batch, self.height + rhs.height, self.width + rhs.width, self.depth + rhs.depth)
def __sub__(self, rhs):
return Shape4D(self.batch - rhs.batch, self.height - rhs.height, self.width - rhs.width, self.depth - rhs.depth)
def __floordiv__(self, rhs):
return Shape4D(
self.batch // rhs.batch, self.height // rhs.height, self.width // rhs.width, self.depth // rhs.depth
)
def __mod__(self, rhs):
return Shape4D(self.batch % rhs.batch, self.height % rhs.height, self.width % rhs.width, self.depth % rhs.depth)
def __str__(self):
return f"<Shape4D {list(self)}>"
def div_round_up(self, rhs):
return Shape4D(
round_up_divide(self.batch, rhs.batch),
round_up_divide(self.height, rhs.height),
round_up_divide(self.width, rhs.width),
round_up_divide(self.depth, rhs.depth),
)
def elements(self):
return self.batch * self.width * self.height * self.depth
def elements_wh(self):
return self.width * self.height
def is_empty(self):
return (self.batch + self.width + self.height + self.depth) == 0
def as_list(self):
return list(self)
def get_hw_as_list(self):
return list([self.height, self.width])
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