RgbMatrix

Kotlin |Java

@UnstableApi
public interface RgbMatrix extends GlEffect

Known direct subclasses

`Brightness`	Modifies brightness of an input frame.
`Contrast`	A `RgbMatrix` to control the contrast of video frames.
`RgbAdjustment`	Scales the red, green, and blue color channels of a frame.
`RgbFilter`	Provides common color filters.

Specifies a 4x4 RGB color transformation matrix to apply to each frame in the fragment shader.

Summary

Public methods
`abstract float[]`	`getMatrix(long presentationTimeUs, boolean useHdr)` Returns the 4x4 RGB transformation `matrix` to apply to the color values of each pixel in the frame with the given timestamp.
`default BaseGlShaderProgram`	`toGlShaderProgram(Context context, boolean useHdr)` Returns a `GlShaderProgram` that applies the effect.

default long

getDurationAfterEffectApplied(long durationUs)

Returns the expected duration of the output stream when the effect is applied given a input durationUs.

default boolean

isNoOp(int inputWidth, int inputHeight)

Returns whether a GlEffect applies no change at every timestamp.

abstract float[] getMatrix(long presentationTimeUs, boolean useHdr)

Returns the 4x4 RGB transformation matrix to apply to the color values of each pixel in the frame with the given timestamp.

Parameters
`long presentationTimeUs`	The timestamp of the frame to apply the matrix on.
`boolean 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 `toGlShaderProgram`.

Returns
`float[]`	The `RgbMatrix` to apply to the frame.

default BaseGlShaderProgram toGlShaderProgram(Context context, boolean useHdr)

Returns a GlShaderProgram that applies the effect.

Parameters
`Context context`	A `Context`.
`boolean useHdr`	Whether input textures come from an HDR source. If `true`, colors will be in linear RGB BT.2020. If `false`, colors will be in linear RGB BT.709.

Throws
`androidx.media3.common.VideoFrameProcessingException`	If an error occurs while creating the `GlShaderProgram`.