Always return a configuration

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

package kaka.cakelight;

import org.opencv.imgproc.Imgproc;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.*;
import java.util.stream.Collectors;

public class Configuration {
    private List<Map.Entry<String, String>> settings = new ArrayList<>();
    public VideoConfiguration video;
    public LedConfiguration leds;
    public double gamma;

    private Configuration(Properties prop) {
        video = new VideoConfiguration(prop);
        leds = new LedConfiguration(prop);
        gamma = Double.parseDouble(get(prop,"gamma", "1"));
    }

    public static Configuration from(String propertiesFile) {
        Properties prop = new Properties();
        try (InputStream input = new FileInputStream(propertiesFile)) {
            prop.load(input);
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        return new Configuration(prop);
    }

    private String get(Properties prop, String name) {
        return addSetting(name, prop.getProperty(name));
    }

    private String get(Properties prop, String name, String dflt) {
        return addSetting(name, prop.getProperty(name, dflt));
    }

    private String addSetting(String name, String value) {
        settings.add(new AbstractMap.SimpleEntry<>(name, value));
        return value;
    }

    @Override
    public String toString() {
        return settings.stream().map(entry -> entry.getKey() + "=" + entry.getValue()).collect(Collectors.joining("\n"));
    }

    public class VideoConfiguration {
        public int width;
        public int height;
        public int bpp;
        public int format;
        public CropConfiguration crop;

        private VideoConfiguration(Properties prop) {
            width = Integer.parseInt(get(prop, "video.width", "720"));
            height = Integer.parseInt(get(prop, "video.height", "576"));
            bpp = Integer.parseInt(get(prop, "video.bpp", "2"));
            switch (get(prop, "video.format", "").toUpperCase()) {
                case "YUYV":
                    format = Imgproc.COLOR_YUV2BGR_YUYV;
                    break;
                case "YVYU":
                    format = Imgproc.COLOR_YUV2BGR_YVYU;
                    break;
                default:
                    format = Imgproc.COLOR_YUV2BGR_UYVY;
            }
            crop = new CropConfiguration(prop);
        }

        public class CropConfiguration {
            public int left, right, top, bottom;

            private CropConfiguration(Properties prop) {
                left = Integer.parseInt(get(prop, "video.crop.left", "0"));
                right = Integer.parseInt(get(prop, "video.crop.right", "0"));
                top = Integer.parseInt(get(prop, "video.crop.top", "0"));
                bottom = Integer.parseInt(get(prop, "video.crop.bottom", "0"));
            }
        }
    }

    public class LedConfiguration {
        public int cols;
        public int rows;
        public int brightness;
        public LedType type;

        private LedConfiguration(Properties prop) {
            cols = Integer.parseInt(get(prop, "leds.cols"));
            rows = Integer.parseInt(get(prop, "leds.rows"));
            brightness = Math.max(1, Math.min(31, Integer.parseInt(get(prop, "leds.brightness", "31"))));
            switch (get(prop, "leds.type", "").toUpperCase()) {
                case "WS2801":
                    type = LedType.WS2801;
                    break;
                case "APA102":
                default:
                    type = LedType.APA102;
            }
        }

        public int getCount() {
            return cols * 2 + rows * 2;
        }
    }

    public enum LedType {
        WS2801, APA102
    }
}