RgbFilter

Kotlin |Java

@UnstableApi
public final class RgbFilter implements RgbMatrix

Provides common color filters.

This effect assumes a linear working color space.

Summary

Public methods
`static RgbFilter`	`createGrayscaleFilter()` Creates a new grayscale `RgbFilter` instance.
`static RgbFilter`	`createInvertedFilter()` Creates a new inverted `RgbFilter` instance.
`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.
`BaseGlShaderProgram`	`toGlShaderProgram(Context context, boolean useHdr)` Returns a `GlShaderProgram` that applies the effect.

long

getDurationAfterEffectApplied(long durationUs)

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

`boolean`	`isNoOp(int inputWidth, int inputHeight)` Returns whether a `GlEffect` applies no change at every timestamp.
`abstract GlShaderProgram`	`toGlShaderProgram(Context context, boolean useHdr)` Returns a `GlShaderProgram` that applies the effect.

public static RgbFilter createGrayscaleFilter()

Creates a new grayscale RgbFilter instance.

public static RgbFilter createInvertedFilter()

Creates a new inverted RgbFilter instance.

public 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.

public 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`.