java.lang.Object
- com.google.android.exoplayer2.effect.Crop

All Implemented Interfaces:

GlEffect, GlMatrixTransformation, MatrixTransformation, Effect
```
public final class Crop
extends Object
implements MatrixTransformation
```
Specifies a crop to apply in the vertex shader.
The background color of the output frame will be black, with alpha = 0 if applicable.

Constructor Summary

Constructors
Constructor	Description
`Crop(float left, float right, float bottom, float top)`	Crops a smaller (or larger) frame, per normalized device coordinates (NDC), where the input frame corresponds to the square ranging from -1 to 1 on the x and y axes.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Pair<Integer,Integer>`	`configure(int inputWidth, int inputHeight)`	Configures the input and output dimensions.
`Matrix`	`getMatrix(long presentationTimeUs)`	Returns the 3x3 transformation `Matrix` to apply to the frame with the given timestamp.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface com.google.android.exoplayer2.effect.GlMatrixTransformation
toGlTextureProcessor

Methods inherited from interface com.google.android.exoplayer2.effect.MatrixTransformation
getGlMatrixArray

- Constructor Detail
  - Crop
```
public Crop(float left,
            float right,
            float bottom,
            float top)
```
    Crops a smaller (or larger) frame, per normalized device coordinates (NDC), where the input frame corresponds to the square ranging from -1 to 1 on the x and y axes.
    left and bottom default to -1, and right and top default to 1, which corresponds to not applying any crop. To crop to a smaller subset of the input frame, use values between -1 and 1. To crop to a larger frame, use values below -1 and above 1.
    
    Parameters:
    
    left - The left edge of the output frame, in NDC. Must be less than right.
    
    right - The right edge of the output frame, in NDC. Must be greater than left.
    
    bottom - The bottom edge of the output frame, in NDC. Must be less than top.
    
    top - The top edge of the output frame, in NDC. Must be greater than bottom.
- Method Detail
  - configure
```
public Pair<Integer,Integer> configure(int inputWidth,
                                             int inputHeight)
```
    Description copied from interface: GlMatrixTransformation
    
    Configures the input and output dimensions.
    Must be called before GlMatrixTransformation.getGlMatrixArray(long).
    
    Specified by:
    
    configure in interface GlMatrixTransformation
    
    Parameters:
    
    inputWidth - The input frame width, in pixels.
    
    inputHeight - The input frame height, in pixels.
    
    Returns:
    
    The output frame width and height, in pixels.
  - getMatrix
```
public Matrix getMatrix(long presentationTimeUs)
```
    Description copied from interface: MatrixTransformation
    
    Returns the 3x3 transformation Matrix to apply to the frame with the given timestamp.
    
    Specified by:
    
    getMatrix in interface MatrixTransformation

Class Crop

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

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

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

Constructor Detail

Crop

Method Detail

configure

getMatrix