kopia lustrzana https://github.com/xdsopl/robot36
Fixing end of line
Marek Ossowski
rodzic
46f376e101
commit
11a94e6e35
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@ -1,10 +1,10 @@
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package xdsopl.robot36;
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import android.graphics.Bitmap;
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public abstract class BaseMode implements Mode {
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@Override
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public Bitmap postProcessScopeImage(Bitmap bmp) {
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return bmp;
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}
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}
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package xdsopl.robot36;
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import android.graphics.Bitmap;
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public abstract class BaseMode implements Mode {
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@Override
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public Bitmap postProcessScopeImage(Bitmap bmp) {
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return bmp;
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}
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}
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@ -1,131 +1,131 @@
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package xdsopl.robot36;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Rect;
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/**
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* HF Fax, IOC 576, 120 lines per minute
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*/
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public class HFFax extends BaseMode {
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private final ExponentialMovingAverage lowPassFilter;
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private final String name;
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private final int sampleRate;
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private final float[] cumulated;
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private int horizontalShift = 0;
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HFFax(int sampleRate) {
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this.name = "HF Fax";
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lowPassFilter = new ExponentialMovingAverage();
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this.sampleRate = sampleRate;
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cumulated = new float[getWidth()];
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}
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private float freqToLevel(float frequency, float offset) {
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return 0.5f * (frequency - offset + 1.f);
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}
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@Override
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public String getName() {
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return name;
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}
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@Override
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public int getVISCode() {
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return -1;
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}
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@Override
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public int getWidth() {
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return 640;
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}
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@Override
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public int getHeight() {
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return 1200;
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}
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@Override
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public int getFirstPixelSampleIndex() {
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return 0;
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}
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@Override
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public int getFirstSyncPulseIndex() {
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return -1;
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}
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@Override
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public int getScanLineSamples() {
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return sampleRate / 2;
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}
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@Override
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public void resetState() {
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}
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@Override
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public Bitmap postProcessScopeImage(Bitmap bmp) {
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int realWidth = 1808;
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int realHorizontalShift = horizontalShift * realWidth / getWidth();
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Bitmap bmpMutable = Bitmap.createBitmap(realWidth, bmp.getHeight(), Bitmap.Config.ARGB_8888);
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Canvas canvas = new Canvas(bmpMutable);
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if (horizontalShift > 0) {
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canvas.drawBitmap(
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bmp,
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new Rect(0, 0, horizontalShift, bmp.getHeight()),
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new Rect(realWidth - realHorizontalShift, 0, realWidth, bmp.getHeight()),
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null);
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}
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canvas.drawBitmap(
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bmp,
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new Rect(horizontalShift, 0, getWidth(), bmp.getHeight()),
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new Rect(0, 1, realWidth - realHorizontalShift, bmp.getHeight() + 1),
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null);
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return bmpMutable;
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}
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@Override
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public boolean decodeScanLine(PixelBuffer pixelBuffer, float[] scratchBuffer, float[] scanLineBuffer, int scopeBufferWidth, int syncPulseIndex, int scanLineSamples, float frequencyOffset) {
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if (syncPulseIndex < 0 || syncPulseIndex + scanLineSamples > scanLineBuffer.length)
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return false;
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int horizontalPixels = getWidth();
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lowPassFilter.cutoff(horizontalPixels, 2 * scanLineSamples, 2);
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lowPassFilter.reset();
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for (int i = 0; i < scanLineSamples; ++i)
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scratchBuffer[i] = lowPassFilter.avg(scanLineBuffer[i]);
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lowPassFilter.reset();
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for (int i = scanLineSamples - 1; i >= 0; --i)
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scratchBuffer[i] = freqToLevel(lowPassFilter.avg(scratchBuffer[i]), frequencyOffset);
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for (int i = 0; i < horizontalPixels; ++i) {
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int position = (i * scanLineSamples) / horizontalPixels;
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int color = ColorConverter.GRAY(scratchBuffer[position]);
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pixelBuffer.pixels[i] = color;
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//accumulate recent values, forget old
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float decay = 0.99f;
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cumulated[i] = cumulated[i] * decay + Color.luminance(color) * (1 - decay);
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}
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//try to detect "sync": thick white margin
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int bestIndex = 0;
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float bestValue = 0;
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for (int x = 0; x < getWidth(); ++x)
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{
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float val = cumulated[x];
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if (val > bestValue)
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{
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bestIndex = x;
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bestValue = val;
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}
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}
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horizontalShift = bestIndex;
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pixelBuffer.width = horizontalPixels;
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pixelBuffer.height = 1;
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return true;
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}
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}
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package xdsopl.robot36;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Color;
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import android.graphics.Rect;
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/**
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* HF Fax, IOC 576, 120 lines per minute
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*/
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public class HFFax extends BaseMode {
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private final ExponentialMovingAverage lowPassFilter;
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private final String name;
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private final int sampleRate;
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private final float[] cumulated;
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private int horizontalShift = 0;
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HFFax(int sampleRate) {
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this.name = "HF Fax";
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lowPassFilter = new ExponentialMovingAverage();
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this.sampleRate = sampleRate;
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cumulated = new float[getWidth()];
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}
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private float freqToLevel(float frequency, float offset) {
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return 0.5f * (frequency - offset + 1.f);
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}
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@Override
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public String getName() {
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return name;
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}
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@Override
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public int getVISCode() {
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return -1;
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}
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@Override
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public int getWidth() {
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return 640;
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}
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@Override
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public int getHeight() {
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return 1200;
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}
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@Override
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public int getFirstPixelSampleIndex() {
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return 0;
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}
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@Override
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public int getFirstSyncPulseIndex() {
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return -1;
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}
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@Override
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public int getScanLineSamples() {
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return sampleRate / 2;
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}
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@Override
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public void resetState() {
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}
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@Override
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public Bitmap postProcessScopeImage(Bitmap bmp) {
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int realWidth = 1808;
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int realHorizontalShift = horizontalShift * realWidth / getWidth();
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Bitmap bmpMutable = Bitmap.createBitmap(realWidth, bmp.getHeight(), Bitmap.Config.ARGB_8888);
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Canvas canvas = new Canvas(bmpMutable);
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if (horizontalShift > 0) {
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canvas.drawBitmap(
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bmp,
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new Rect(0, 0, horizontalShift, bmp.getHeight()),
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new Rect(realWidth - realHorizontalShift, 0, realWidth, bmp.getHeight()),
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null);
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}
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canvas.drawBitmap(
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bmp,
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new Rect(horizontalShift, 0, getWidth(), bmp.getHeight()),
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new Rect(0, 1, realWidth - realHorizontalShift, bmp.getHeight() + 1),
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null);
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return bmpMutable;
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}
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@Override
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public boolean decodeScanLine(PixelBuffer pixelBuffer, float[] scratchBuffer, float[] scanLineBuffer, int scopeBufferWidth, int syncPulseIndex, int scanLineSamples, float frequencyOffset) {
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if (syncPulseIndex < 0 || syncPulseIndex + scanLineSamples > scanLineBuffer.length)
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return false;
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int horizontalPixels = getWidth();
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lowPassFilter.cutoff(horizontalPixels, 2 * scanLineSamples, 2);
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lowPassFilter.reset();
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for (int i = 0; i < scanLineSamples; ++i)
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scratchBuffer[i] = lowPassFilter.avg(scanLineBuffer[i]);
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lowPassFilter.reset();
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for (int i = scanLineSamples - 1; i >= 0; --i)
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scratchBuffer[i] = freqToLevel(lowPassFilter.avg(scratchBuffer[i]), frequencyOffset);
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for (int i = 0; i < horizontalPixels; ++i) {
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int position = (i * scanLineSamples) / horizontalPixels;
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int color = ColorConverter.GRAY(scratchBuffer[position]);
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pixelBuffer.pixels[i] = color;
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//accumulate recent values, forget old
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float decay = 0.99f;
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cumulated[i] = cumulated[i] * decay + Color.luminance(color) * (1 - decay);
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}
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//try to detect "sync": thick white margin
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int bestIndex = 0;
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float bestValue = 0;
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for (int x = 0; x < getWidth(); ++x)
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{
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float val = cumulated[x];
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if (val > bestValue)
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{
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bestIndex = x;
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bestValue = val;
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}
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}
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horizontalShift = bestIndex;
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pixelBuffer.width = horizontalPixels;
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pixelBuffer.height = 1;
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return true;
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}
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}
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