Brightness

Kotlin |Java

@UnstableApi
public final class Brightness implements RgbMatrix

Modifies brightness of an input frame.

Summary

Public constructors
`Brightness(@FloatRange(from = "-1", to = 1) float brightness)` Modifies brightness by adding a constant value to red, green, and blue values.

Public methods
`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.
`boolean`	`isNoOp(int inputWidth, int inputHeight)` Returns whether a `GlEffect` applies no change at every timestamp.

long

getDurationAfterEffectApplied(long durationUs)

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

abstract GlShaderProgram

toGlShaderProgram(Context context, boolean useHdr)

Returns a GlShaderProgram that applies the effect.

BaseGlShaderProgram

toGlShaderProgram(Context context, boolean useHdr)

Returns a GlShaderProgram that applies the effect.

public Brightness(@FloatRange(from = "-1", to = 1) float brightness)

Modifies brightness by adding a constant value to red, green, and blue values.

Parameters
`@FloatRange(from = "-1", to = 1) float brightness`	The constant value to add to red, green, and blue values. Should be greater than or equal to `-1f`, and less than or equal to `1f`. `0` means to leave brightness unchanged.

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 boolean isNoOp(int inputWidth, int inputHeight)

Returns whether a GlEffect applies no change at every timestamp.

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

Parameters
`int inputWidth`	The input frame width, in pixels.
`int inputHeight`	The input frame height, in pixels.