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# Copyright 2025 The Scenic Authors.
#
# 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.
"""Unit tests for functions in video_utils.py."""
from absl.testing import absltest
from absl.testing import parameterized
import numpy as np
from scenic.common_lib import video_utils
class VideoUtilsTest(parameterized.TestCase):
"""Test video utils."""
@parameterized.named_parameters([
('n_sampled_frames_32', 32, (32, 32, 224, 224, 3)),
('n_sampled_frames_18', 18, (32, 19, 224, 224, 3)),
])
def test_sample_frames_uniformly(self, n_sampled_frames, output_shape):
"""Test frame sampling."""
input_shape = (32, 128, 224, 224, 3)
self.assertSequenceEqual(
output_shape,
video_utils.sample_frames_uniformly(
np.zeros(input_shape), n_sampled_frames).shape)
if __name__ == '__main__':
absltest.main()
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