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Add RgbAdjustment class to build RgbaMatrices
* Add RgbaMatrix interface implementation. * Add Builder class for easy adjustments. * Adjust existing RgbaMatrixPixelTests to use new RgbAdjustment class. PiperOrigin-RevId: 465545429
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...droid_libs/media/libraries/effect/src/main/java/androidx/media3/effect/RgbAdjustment.java
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| /* | ||
| * Copyright 2022 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. | ||
| */ | ||
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| package androidx.media3.effect; | ||
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| import static com.google.android.exoplayer2.util.Assertions.checkArgument; | ||
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| import android.opengl.Matrix; | ||
| import com.google.errorprone.annotations.CanIgnoreReturnValue; | ||
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| /** Scales the red, green, and blue color channels of a frame. */ | ||
| public final class RgbAdjustment implements RgbaMatrix { | ||
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| /** A builder for {@link RgbAdjustment} instances. */ | ||
| public static final class Builder { | ||
| private float redScale; | ||
| private float greenScale; | ||
| private float blueScale; | ||
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| /** Creates a new instance with default values. */ | ||
| public Builder() { | ||
| redScale = 1; | ||
| greenScale = 1; | ||
| blueScale = 1; | ||
| } | ||
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| /** | ||
| * Scales the red channel of the frame by {@param redScale}. | ||
| * | ||
| * @param redScale The scale to apply to the red channel. Needs to be non-negative and the | ||
| * default value is {@code 1}. | ||
| */ | ||
| @CanIgnoreReturnValue | ||
| public Builder setRedScale(float redScale) { | ||
| checkArgument(0 <= redScale, "Red scale needs to be non-negative."); | ||
| this.redScale = redScale; | ||
| return this; | ||
| } | ||
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| /** | ||
| * Scales the green channel of the frame by {@param greenScale}. | ||
| * | ||
| * @param greenScale The scale to apply to the green channel. Needs to be non-negative and the | ||
| * default value is {@code 1}. | ||
| */ | ||
| @CanIgnoreReturnValue | ||
| public Builder setGreenScale(float greenScale) { | ||
| checkArgument(0 <= greenScale, "Green scale needs to be non-negative."); | ||
| this.greenScale = greenScale; | ||
| return this; | ||
| } | ||
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| /** | ||
| * Scales the blue channel of the frame by {@param blueScale}. | ||
| * | ||
| * @param blueScale The scale to apply to the blue channel. Needs to be non-negative and the | ||
| * default value is {@code 1}. | ||
| */ | ||
| @CanIgnoreReturnValue | ||
| public Builder setBlueScale(float blueScale) { | ||
| checkArgument(0 <= blueScale, "Blue scale needs to be non-negative."); | ||
| this.blueScale = blueScale; | ||
| return this; | ||
| } | ||
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| /** Creates a new {@link RgbAdjustment} instance. */ | ||
| public RgbAdjustment build() { | ||
| float[] rgbaMatrix = new float[16]; | ||
| Matrix.setIdentityM(rgbaMatrix, /* smOffset= */ 0); | ||
| Matrix.scaleM( | ||
| rgbaMatrix, | ||
| /* smOffset= */ 0, | ||
| /* x= */ redScale, | ||
| /* y= */ greenScale, | ||
| /* z= */ blueScale); | ||
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| return new RgbAdjustment(rgbaMatrix); | ||
| } | ||
| } | ||
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| private final float[] rgbaMatrix; | ||
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| private RgbAdjustment(float[] rgbaMatrix) { | ||
| this.rgbaMatrix = rgbaMatrix; | ||
| } | ||
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| @Override | ||
| public float[] getMatrix(long presentationTimeUs) { | ||
| return rgbaMatrix; | ||
| } | ||
| } |
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...ta/src/test/assets/media/bitmap/sample_mp4_first_frame/increase_red_channel.png
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