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// Package name should be strictly defined as com.flashphoner.mixerlayout
package com.flashphoner.mixerlayout;

// Import mixer layout interface
import com.flashphoner.sdk.media.IVideoMixerLayout;
// Import YUV frame description
import com.flashphoner.sdk.media.YUVFrame;

// Import Java packages to use
import java.awt.*;
import java.util.ArrayList;

/**
public class* TestLayoutCustom implementsmixer IVideoMixerLayout {

    private static final int PADDING = 4;

    @Override
    public Layout[] computeLayout(YUVFrame[] yuvFrames, String[] strings, int canvasWidth, int canvasHeight) {layout implementation example
 */
public class TestLayout implements IVideoMixerLayout {

    // Pictures padding, should be even (or zero if no padding needed)
    private static final int PADDING = 4;

    /**
     * Function to compute layout, will be called by mixer before encoding output stream picture
     * This example computes grid layout
     * @param yuvFrames - incoming streams raw pictures array in YUV format
     * @param strings - incoming streams names array
     * @param canvasWidth - mixer output picture canwas width
     * @param canvasHeight - mixer output picture canwas heigth
     * @return array of pictures layouts
     */
    @Override
    public Layout[] computeLayout(YUVFrame[] yuvFrames, String[] strings, int canvasWidth, int canvasHeight) {
        // Declare picture layouts list to fill
        ArrayList<IVideoMixerLayout.Layout> layout = new ArrayList<>();

        // Find canvas center height
        int canvasCenter = canvasHeight / 2;
        // Find frame center
        int frameCenter = canvasCenter - (canvasHeight / yuvFrames.length) / 2;

        // Find every picture dimensions (this are the same for all the pictures because this is grid layout)
        ArrayList<IVideoMixerLayout.Layout>int layoutlayoutWidth = new ArrayList<>();

 canvasWidth / yuvFrames.length - PADDING;
        int canvasCenterlayoutHeight = canvasHeight / 2yuvFrames.length;

        int// frameCenterIterate =through canvasCenterincoming -stream (canvasHeight / yuvFrames.length) / 2;
pictures array
        int layoutWidth = canvasWidth // yuvFrames.length - PADDING;
        int layoutHeight = canvasHeight / yuvFrames.length;
Note: streams pictures order corresponds to stream names array, use this to reorder pictures if needed
        for (int c = 0; c < yuvFrames.length; c++) {
            // Use Java AWT Point and Dimension
            Point prevPoint = new Point();
            Dimension prevDimension = new Dimension();
            if (layout.size() > 0) {) {
                // Find previous picture location to calculate next one
                prevPoint.setLocation(layout.get(c - 1).getPoint());
                prevDimension.setSize(layout.get(c - 1).getDimension());
            }
            // Set starting point of the picture
            Point currentPoint = new Point((int) (prevPoint.getX() + prevDimension.getWidth() + PADDING),
                    frameCenter);
            // Create the picture layout passing starting point, dimensions and raw picture YUV frameCenter);
frames
            layout.add(new IVideoMixerLayout.Layout(currentPoint, new Dimension(layoutWidth,
                    layoutHeight), yuvFrames[c]));
        }
        // Return pictures layouts calculated as array
        return layout.toArray(new IVideoMixerLayout.Layout[layout.size()]);
    }
}