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Add ChannelMixingMatrix property unit tests.

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PiperOrigin-RevId: 505720834
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samrobinson 2023-01-30 17:47:40 +00:00 committed by christosts
parent f5e31989ab
commit c2b0d1b756
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libraries/transformer/src/test/java/androidx/media3/transformer/ChannelMixingMatrixTest.java Normal file
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/*
* Copyright 2023 The Android Open Source Project
*
* 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.
*/
package androidx.media3.transformer;
import static com.google.common.truth.Truth.assertThat;
import androidx.test.ext.junit.runners.AndroidJUnit4;
import org.junit.Test;
import org.junit.runner.RunWith;
/** Unit tests for {@link ChannelMixingMatrix}. */
@RunWith(AndroidJUnit4.class)
public class ChannelMixingMatrixTest {
@Test
public void allZeroValues_3To2_hasCorrectProperties() {
int inputCount = 3;
int outputCount = 2;
float[] coefficients =
new float[] {
0f, 0f,
0f, 0f,
0f, 0f,
};
ChannelMixingMatrix matrix = new ChannelMixingMatrix(inputCount, outputCount, coefficients);
assertThat(matrix.isZero()).isTrue();
assertThat(matrix.isSquare()).isFalse();
assertThat(matrix.isDiagonal()).isFalse();
}
@Test
public void allZeroValues_3To3_hasCorrectProperties() {
int inputCount = 3;
int outputCount = 3;
float[] coefficients =
new float[] {
0f, 0f, 0f,
0f, 0f, 0f,
0f, 0f, 0f,
};
ChannelMixingMatrix matrix = new ChannelMixingMatrix(inputCount, outputCount, coefficients);
assertThat(matrix.isZero()).isTrue();
assertThat(matrix.isSquare()).isTrue();
assertThat(matrix.isDiagonal()).isTrue();
}
@Test
public void allZeroValues_3To4_hasCorrectProperties() {
int inputCount = 3;
int outputCount = 4;
float[] coefficients =
new float[] {
0f, 0f, 0f, 0f,
0f, 0f, 0f, 0f,
0f, 0f, 0f, 0f,
};
ChannelMixingMatrix matrix = new ChannelMixingMatrix(inputCount, outputCount, coefficients);
assertThat(matrix.isZero()).isTrue();
assertThat(matrix.isSquare()).isFalse();
assertThat(matrix.isDiagonal()).isFalse();
}
@Test
public void oneNonZeroValue_3To4_hasCorrectProperties() {
int inputCount = 3;
int outputCount = 4;
float[] coefficients =
new float[] {
0f, 0f, 0f, 0f,
0f, 0f, 0f, 0.2f,
0f, 0f, 0f, 0f,
};
ChannelMixingMatrix matrix = new ChannelMixingMatrix(inputCount, outputCount, coefficients);
assertThat(matrix.isZero()).isFalse();
assertThat(matrix.isSquare()).isFalse();
assertThat(matrix.isDiagonal()).isFalse();
}
@Test
public void zeroValuesOnDiagonal_2To2_hasCorrectProperties() {
int inputCount = 2;
int outputCount = 2;
float[] coefficients =
new float[] {
0f, 1f,
2f, 0f,
};
ChannelMixingMatrix matrix = new ChannelMixingMatrix(inputCount, outputCount, coefficients);
assertThat(matrix.isZero()).isFalse();
assertThat(matrix.isSquare()).isTrue();
assertThat(matrix.isDiagonal()).isFalse();
}
@Test
public void nonZeroValuesOnDiagonal_4To4_hasCorrectProperties() {
int inputCount = 4;
int outputCount = 4;
float[] coefficients =
new float[] {
1f, 0f, 0f, 0f,
0f, 2f, 0f, 0f,
0f, 0f, 3f, 0f,
0f, 0f, 0f, 0f,
};
ChannelMixingMatrix matrix = new ChannelMixingMatrix(inputCount, outputCount, coefficients);
assertThat(matrix.isZero()).isFalse();
assertThat(matrix.isSquare()).isTrue();
assertThat(matrix.isDiagonal()).isTrue();
}
@Test
public void allNonZeroValues_2To4_hasCorrectProperties() {
int inputCount = 2;
int outputCount = 4;
float[] coefficients =
new float[] {
1f, 3f, 5f, 10f,
4f, 2f, 9f, 123f,
};
ChannelMixingMatrix matrix = new ChannelMixingMatrix(inputCount, outputCount, coefficients);
assertThat(matrix.isZero()).isFalse();
assertThat(matrix.isSquare()).isFalse();
assertThat(matrix.isDiagonal()).isFalse();
}
}