Add very special handling for the MJPG video format

[kaka/cakelight.git] / src / kaka / cakelight / VideoFrame.java

package kaka.cakelight;

import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.Size;
import org.opencv.imgproc.Imgproc;

import static kaka.cakelight.Main.saveFile;
import static kaka.cakelight.Main.timeIt;

public class VideoFrame {
    private byte[] data;
    private Configuration config;
//    private Mat colImage;
//    private Mat rowImage;
    private Mat converted;
    private Mat[] images;

    private VideoFrame(byte[] data) {
        this.data = data;
    }

    public static VideoFrame of(byte[] data, Configuration config) {
        VideoFrame frame = new VideoFrame(data);
        frame.config = config;
        if (config.video.mjpg) {
            frame.convertJpg();
        } else {
            frame.convert();
        }
        return frame;
    }

    private void convertJpg() {
        Mat src = new Mat(config.video.height, config.video.width, CvType.CV_8UC3); // 8-bit, unsigned, 3 channels
        src.put(0, 0, data);
//        save(src, "/home/kaka/test-src.data");

        converted = new Mat();
        Imgproc.cvtColor(src, converted, Imgproc.COLOR_BGR2RGB);

        Core.flip(converted, converted, 0); // up-side down
//        save(converted, "/home/kaka/test-converted.data");
        int mysteriousPixelShift = 18;
        converted = converted.submat( // crop mysterious pixel shift
                0,
                converted.rows(),
                mysteriousPixelShift,
                converted.cols() - mysteriousPixelShift
        );
//        save(converted, "/home/kaka/test-croppedAgain.data");
        model4(converted, Imgproc.INTER_AREA);
        src.release();
        converted.release();
    }

    private void convert() {
        /* TODO: how to do this?
        1) Resize to an image with the size of the number of leds and use config to define how many pixels deep into the screen to use.
        2) Resize to 16x9 and use 2 pixels of depth (or maybe 3) and interpolate for each led.
        3) Resize to 2 images where each led uses 2 pixels:
            vertical   - 16 x <#leds>
            horizontal - <#leds> x 9
        4) Resize to cols x rows first, then resize to a vertical and a horizontal like in (3).
         */
        Mat src = new Mat(config.video.height, config.video.width, CvType.CV_8UC2); // 8-bit, unsigned, 2 channels
        src.put(0, 0, data);

//        Mat converted = new Mat();
//        Mat resized = new Mat();
//
//        timeIt("total", () -> {
//            timeIt("yuyv2rgb", () -> Imgproc.cvtColor(src, converted, Imgproc.COLOR_YUV2RGB_YUYV)); // 3.5 - 4.0 ms
//            timeIt("resizing", () -> Imgproc.resize(converted, resized, new Size(config.leds.cols, config.leds.rows), 0, 0, Imgproc.INTER_AREA)); // INTER_AREA is the best for shrinking, but also the slowest (~1.5 ms)
//        });

        Mat cropped = src.submat(
                config.video.crop.top,
                config.video.height - config.video.crop.bottom,
                config.video.crop.left,
                config.video.width - config.video.crop.right
        );
        converted = new Mat();
        Imgproc.cvtColor(cropped, converted, config.video.format);
//        timeIt("model 1", () -> model1(converted, Imgproc.INTER_AREA));
//        timeIt("model 2", () -> model2(converted, Imgproc.INTER_AREA));
//        timeIt("model 3", () -> model3(converted, Imgproc.INTER_AREA));
        timeIt("model 4", () -> model4(converted, Imgproc.INTER_AREA));
//        save(converted, "/home/kaka/test-converted.data");
//        save(resized, "/home/kaka/test-resized.data");
        src.release();
        cropped.release();
    }

    private void model1(Mat src, int interpolation) {
        Mat resized = new Mat();
        Imgproc.resize(src, resized, new Size(config.leds.cols, config.leds.rows), 0, 0, interpolation);
    }

    private void model2(Mat src, int interpolation) {
        Mat resized = new Mat();
        Imgproc.resize(src, resized, new Size(16, 9), 0, 0, interpolation);
    }

    private void model3(Mat src, int interpolation) {
//        colImage = new Mat();
//        rowImage = new Mat();
//        Imgproc.resize(src, colImage, new Size(config.leds.cols, 9), 0, 0, interpolation);
//        Imgproc.resize(src, rowImage, new Size(16, config.leds.rows), 0, 0, interpolation);
    }

    private void model4(Mat src, int interpolation) {
        int width = 3 * src.cols() / 16;
        int height = 3 * src.rows() / 9;
        Mat[] cropped = new Mat[] {
                /* LEFT   */ src.submat(0, src.rows(), 0, width),
                /* RIGHT  */ src.submat(0, src.rows(), src.cols() - width, src.cols()),
                /* TOP    */ src.submat(0, height, 0, src.cols()),
                /* BOTTOM */ src.submat(src.rows() - height, src.rows(), 0, src.cols()),
        };
        images = new Mat[] {new Mat(), new Mat(), new Mat(), new Mat()};
//        Imgproc.resize(cropped[ListPosition.LEFT.ordinal()], images[ListPosition.LEFT.ordinal()], new Size(3, config.leds.rows), 0, 0, interpolation);
        Imgproc.resize(cropped[0], images[0], new Size(3, config.leds.rows), 0, 0, interpolation);
        Imgproc.resize(cropped[1], images[1], new Size(3, config.leds.rows), 0, 0, interpolation);
        Imgproc.resize(cropped[2], images[2], new Size(config.leds.cols, 3), 0, 0, interpolation);
        Imgproc.resize(cropped[3], images[3], new Size(config.leds.cols, 3), 0, 0, interpolation);
//        Imgproc.resize(src, colImage, new Size(config.leds.cols, 9), 0, 0, interpolation);
//        Imgproc.resize(src, rowImage, new Size(16, config.leds.rows), 0, 0, interpolation);
    }

    private Color wrappedGetLedColor(ListPosition listPosition, int xy) {
        Color c = getLedColor(listPosition, xy);
        double[] hsv = c.toHSV();
        double saturation = config.video.saturation >= 0.5
                ? hsv[1] + (config.video.saturation - 0.5) * 2 * (1 - hsv[1])
                : hsv[1] - (1 - config.video.saturation * 2) * hsv[1];
        return Color.hsv(hsv[0], saturation, hsv[2]);
    }

    private Color getLedColor(ListPosition listPosition, int xy) {
        // TODO: maybe use highest value from pixels? 100 % from 1st, 66 % from 2nd, 33 % from 3rd. colors might be strange.
        switch (listPosition) {
            case LEFT:
                return interpolatedRowColor(images[0], xy, 0, 1, 2);
//                return interpolatedRowColor(xy, 0, 1, 2);
            case RIGHT:
                return interpolatedRowColor(images[1], xy, 2, 1, 0);
//                return interpolatedRowColor(xy, 15, 14, 13);
            case TOP:
                return interpolatedColColor(images[2], xy, 0, 1, 2);
//                return interpolatedColColor(xy, 0, 1, 2);
            case BOTTOM:
                return interpolatedColColor(images[3], xy, 2, 1, 0);
//                return interpolatedColColor(xy, 8, 7, 6);
        }
        return null;
    }

    //    private Color interpolatedRowColor(int y, int x1, int x2, int x3) {
    private Color interpolatedRowColor(Mat rowImage, int y, int x1, int x2, int x3) {
        return pixelToColor(rowImage, x3, y).interpolate(pixelToColor(rowImage, x2, y), 0.65).interpolate(pixelToColor(rowImage, x1, y), 0.65);
    }

//    private Color interpolatedColColor(int x, int y1, int y2, int y3) {
    private Color interpolatedColColor(Mat colImage, int x, int y1, int y2, int y3) {
        return pixelToColor(colImage, x, y3).interpolate(pixelToColor(colImage, x, y2), 0.65).interpolate(pixelToColor(colImage, x, y1), 0.65);
    }

    private Color pixelToColor(Mat image, int x, int y) {
        byte[] rgb = new byte[3];
        image.get(y, x, rgb);
        return Color.rgb(rgb[0] & 0xff, rgb[1] & 0xff, rgb[2] & 0xff);
    }

    private void save(Mat mat, String filepath) {
        byte[] data = new byte[mat.cols() * mat.rows() * mat.channels()];
        mat.get(0, 0, data);
        saveFile(data, filepath);
    }

    public byte[] getData() {
        byte[] buff = new byte[(int) (converted.total() * converted.channels())];
        converted.get(0, 0, buff);
        return buff;
    }

//    public Mat getColImage() {
//        return colImage;
//    }

//    public Mat getRowImage() {
//        return rowImage;
//    }

    public Mat getConvertedImage() {
        return converted;
    }

    /**
     * Creates a LED frame going counter-clockwise from the bottom-left corner, sans the corners.
     */
    public LedFrame getLedFrame() {
        LedFrame frame = LedFrame.from(config);
        int led = 0;

        if (config.video.list.bottom)
            for (int i = 0; i < config.leds.cols; i++)      frame.setLedColor(led++, wrappedGetLedColor(ListPosition.BOTTOM, i));
	else
	    for (int i = 0; i < config.leds.cols; i++)      frame.setLedColor(led++, Color.BLACK);

        if (config.video.list.right)
            for (int i = config.leds.rows - 1; i >= 0; i--) frame.setLedColor(led++, wrappedGetLedColor(ListPosition.RIGHT, i));
        else
            for (int i = config.leds.rows - 1; i >= 0; i--) frame.setLedColor(led++, Color.BLACK);

        if (config.video.list.top)
            for (int i = config.leds.cols - 1; i >= 0; i--) frame.setLedColor(led++, wrappedGetLedColor(ListPosition.TOP, i));
        else
            for (int i = config.leds.cols - 1; i >= 0; i--) frame.setLedColor(led++, Color.BLACK);

        if (config.video.list.left)
            for (int i = 0; i < config.leds.rows; i++)      frame.setLedColor(led++, wrappedGetLedColor(ListPosition.LEFT, i));
        else
            for (int i = 0; i < config.leds.rows; i++)      frame.setLedColor(led++, Color.BLACK);

        return frame;
    }

    private enum ListPosition {
        LEFT,
        RIGHT,
        TOP,
        BOTTOM
    }
}