Contrast (ExoPlayer library)

Package com.google.android.exoplayer2.effect

Class Contrast

• java.lang.Object

• • com.google.android.exoplayer2.effect.Contrast

• All Implemented Interfaces:GlEffect, RgbMatrix, Effect

[@Deprecated](https://developer.android.com/reference/java/lang/Deprecated.html "class or interface in java.lang")public classContrastextends[Object](https://developer.android.com/reference/java/lang/Object.html "class or interface in java.lang")implements[RgbMatrix](RgbMatrix.html "interface in com.google.android.exoplayer2.effect")

Deprecated. com.google.android.exoplayer2 is deprecated. Please migrate to androidx.media3 (which contains the same ExoPlayer code). See the migration guide for more details, including a script to help with the migration.

A RgbMatrix to control the contrast of video frames.

Constructor Summary

Constructors | Constructor | Description | | --- | --- | | Contrast​(float contrast) | Deprecated.

Creates a new instance for the given contrast value. |

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods | Modifier and Type | Method | Description | | --- | --- | --- | | float[] | getMatrix​(long presentationTimeUs, boolean useHdr) | Deprecated.

Returns the 4x4 RGB transformation matrix to apply to the color values of each pixel in the frame with the given timestamp. | | boolean | isNoOp​(int inputWidth, int inputHeight) | Deprecated.

Returns whether a GlEffect applies no change at every timestamp. |

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Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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Methods inherited from interface com.google.android.exoplayer2.effect.RgbMatrix

toGlShaderProgram

Constructor Detail

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Contrast

public Contrast​(@FloatRange(from=-1.0,to=1.0)
                float contrast)

Deprecated.

Creates a new instance for the given contrast value.

Contrast values range from -1 (all gray pixels) to 1 (maximum difference of colors). 0 means to add no contrast and leaves the frames unchanged.

Method Detail

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getMatrix

public float[] getMatrix​(long presentationTimeUs,
                         boolean useHdr)

Deprecated.

Description copied from interface: RgbMatrix

Returns the 4x4 RGB transformation matrix to apply to the color values of each pixel in the frame with the given timestamp. Specified by:getMatrix in interface RgbMatrixParameters:presentationTimeUs - The timestamp of the frame to apply the matrix on.useHdr - If true, colors will be in linear RGB BT.2020. If false, colors will be in linear RGB BT.709. Must be consistent with useHdr in RgbMatrix.toGlShaderProgram(Context, boolean).Returns:The RgbMatrix to apply to the frame.

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isNoOp

public boolean isNoOp​(int inputWidth,
                      int inputHeight)

Deprecated.

Description copied from interface: GlEffect

Returns whether a GlEffect applies no change at every timestamp.

This can be used as a hint to skip this instance.

Specified by:isNoOp in interface GlEffectParameters:inputWidth - The input frame width, in pixels.inputHeight - The input frame height, in pixels.