RgbMatrix

Kotlin |Java

@UnstableApi
interface RgbMatrix : 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 functions
`FloatArray<Float>!`	`getMatrix(presentationTimeUs: Long, useHdr: Boolean)` Returns the 4x4 RGB transformation `matrix` to apply to the color values of each pixel in the frame with the given timestamp.
`BaseGlShaderProgram!`	`toGlShaderProgram(context: Context!, useHdr: Boolean)` Returns a `GlShaderProgram` that applies the effect.

Long

getDurationAfterEffectApplied(durationUs: Long)

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

Boolean

isNoOp(inputWidth: Int, inputHeight: Int)

Returns whether a GlEffect applies no change at every timestamp.

fun getMatrix(presentationTimeUs: Long, useHdr: Boolean): FloatArray<Float>!

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

Parameters
`presentationTimeUs: Long`	The timestamp of the frame to apply the matrix on.
`useHdr: Boolean`	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
`FloatArray<Float>!`	The `RgbMatrix` to apply to the frame.

fun toGlShaderProgram(context: Context!, useHdr: Boolean): BaseGlShaderProgram!

Returns a GlShaderProgram that applies the effect.

Parameters
`context: Context!`	A `Context`.
`useHdr: Boolean`	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`.