io.straas.android.sdk.streaming

Class BaseImageFilter

java.lang.Object

io.straas.android.sdk.streaming.BaseImageFilter

Direct Known Subclasses:

SkinBeautifyFilter

public class BaseImageFilter
extends Object

BaseImageFilter is a base filter for Straas streaming SDK. You can extend this class and override methods by OpenGLES to build a filter. This filter can be used by StreamManager.setFilter(BaseImageFilter).

You can use mShapeCoordinate as shape coordinate buffer and mTextureCoordinate as texture coordinate buffer and mIndicesOrder as indices order buffer to draw a picture with default direction. To change direction, you can use the information of the variables to create your own coordinates and order.

Field Summary

Fields

Modifier and Type	Field and Description
protected static int	COORDS_PER_VERTEX How many elements per shape vertex in mShapeCoordinate.
protected int	mHeight Output video height.
protected ShortBuffer	mIndicesOrder Order of drawing indices by default.
protected FloatBuffer	mShapeCoordinate Shape coordinate by default.
protected FloatBuffer	mTextureCoordinate Texture coordinate by default.
protected int	mWidth Output video width.
protected static int	TEXTURE_COORDS_PER_VERTEX How many elements per texture vertex in mTextureCoordinate.

Constructor Summary

Constructors

Constructor and Description
BaseImageFilter()

Method Summary

Modifier and Type	Method and Description
void	onDestroy() Called when this filter destroys.
void	onDraw(int imageTexture, int targetFrameBuffer) Override this method by OpenGLES to define how the drawing occurs.
void	onInit(int width, int height) Called when initializing.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

COORDS_PER_VERTEX

protected static final int COORDS_PER_VERTEX

How many elements per shape vertex in mShapeCoordinate.

See Also:

Constant Field Values

TEXTURE_COORDS_PER_VERTEX

protected static final int TEXTURE_COORDS_PER_VERTEX

How many elements per texture vertex in mTextureCoordinate.

See Also:

Constant Field Values

mWidth

protected int mWidth

Output video width. This variable will be set to output video width after onInit(int, int).

mHeight

protected int mHeight

Output video height. This variable will be set to output video height after onInit(int, int).

mIndicesOrder

protected ShortBuffer mIndicesOrder

Order of drawing indices by default. This will be set to {0, 1, 2, 0, 2, 3} after onInit(int, int) finishes.

mShapeCoordinate

protected FloatBuffer mShapeCoordinate

Shape coordinate by default. This will be set to {-1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f} after onInit(int, int) finishes. Two elements represent a vertex(X, Y) and we use four vertex to draw a rectangle image.

mTextureCoordinate

protected FloatBuffer mTextureCoordinate

Texture coordinate by default. This will be set to {0.0f, 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f} after onInit(int, int) finishes. Two elements represent a vertex(X, Y) and we use four vertex to draw a rectangle image.

Constructor Detail

BaseImageFilter

public BaseImageFilter()

Method Detail

onInit

public void onInit(int width,
                   int height)

Called when initializing.

Parameters:

width - output video width

height - output video height

onDraw

public void onDraw(int imageTexture,
                   int targetFrameBuffer)

Override this method by OpenGLES to define how the drawing occurs. This method does nothing by default.

Parameters:

imageTexture - origin texture name. see OpenGLES glGenTextures

targetFrameBuffer - target frame buffer object name. see OpenGLES glGenFramebuffers

onDestroy

public void onDestroy()

Called when this filter destroys.