package io.swtc.proccessing;

/*
*
* Soon to be deprecated!
*
* */

@Deprecated
public class AutoGainProcessor {

    public float[] calculateAutoGains(int[] pixels) {
        long rSum = 0, gSum = 0, bSum = 0;

        int step = 8;
        int sampledCount = 0;

        for (int i = 0; i < pixels.length; i += step) {
            int pixel = pixels[i];
            rSum += (pixel >> 16) & 0xFF;
            gSum += (pixel >> 8) & 0xFF;
            bSum += pixel & 0xFF;
            sampledCount++;
        }

        if (sampledCount == 0) return new float[]{1f, 1f, 1f};

        float rAvg = (float) rSum / sampledCount;
        float gAvg = (float) gSum / sampledCount;
        float bAvg = (float) bSum / sampledCount;

        float grayAvg = (rAvg + gAvg + bAvg) / 3.0f;

        if (grayAvg < 1.0f) return new float[]{1.0f, 1.0f, 1.0f};

        return new float[]{
                Math.min(2.0f, grayAvg / rAvg),
                Math.min(2.0f, grayAvg / gAvg),
                Math.min(2.0f, grayAvg / bAvg)
        };
    }
}