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prepare using header

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This commit is contained in:
Ahmet Inan 2024-04-29 09:07:40 +02:00
parent c2efb8036f
commit 51c241b6fb
8 changed files with 74 additions and 21 deletions
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51
app/src/main/java/xdsopl/robot36/Decoder.java
View file

@ -6,8 +6,6 @@ Copyright 2024 Ahmet Inan <xdsopl@gmail.com>
package xdsopl.robot36;
import android.util.Log;
import java.util.ArrayList;
import java.util.Arrays;
@ -27,7 +25,7 @@ public class Decoder {
private final float[] last5msFrequencyOffsets;
private final float[] last9msFrequencyOffsets;
private final float[] last20msFrequencyOffsets;
private final float[] visCodeBitFreqs;
private final float[] visCodeBitFrequencies;
private final int scanLineReserveSamples;
private final int syncPulseToleranceSamples;
private final int scanLineToleranceSamples;
@ -48,6 +46,7 @@ public class Decoder {
private int lastSyncPulseIndex;
private int lastScanLineSamples;
private float lastFrequencyOffset;
private float leaderFreqOffset;
Decoder(PixelBuffer scopeBuffer, int sampleRate) {
this.scopeBuffer = scopeBuffer;
@ -69,7 +68,7 @@ public class Decoder {
visCodeBitSamples = (int) Math.round(visCodeBitSeconds * sampleRate);
double visCodeSeconds = 0.3;
visCodeSamples = (int) Math.round(visCodeSeconds * sampleRate);
visCodeBitFreqs = new float[10];
visCodeBitFrequencies = new float[10];
int scanLineCount = 4;
last5msScanLines = new int[scanLineCount];
last9msScanLines = new int[scanLineCount];
@ -218,27 +217,27 @@ public class Decoder {
preBreakFreq = preBreakFreq * halfBandWidth / leaderBreakSamples + centerFreq;
if (preBreakFreq < 1850 || preBreakFreq > 1950)
return false;
float postBreakFreq = 0;
float leaderFreq = 0;
for (int i = transitionSamples; i < leaderToneSamples - transitionSamples; ++i)
postBreakFreq += scanLineBuffer[syncPulseIndex + i];
float freqOffset = postBreakFreq / (leaderToneSamples - 2 * transitionSamples);
postBreakFreq = postBreakFreq * halfBandWidth / (leaderToneSamples - 2 * transitionSamples) + centerFreq;
if (postBreakFreq < 1850 || postBreakFreq > 1950)
leaderFreq += scanLineBuffer[syncPulseIndex + i];
leaderFreqOffset = leaderFreq / (leaderToneSamples - 2 * transitionSamples);
leaderFreq = leaderFreq * halfBandWidth / (leaderToneSamples - 2 * transitionSamples) + centerFreq;
if (leaderFreq < 1850 || leaderFreq > 1950)
return false;
Arrays.fill(visCodeBitFreqs, 0);
Arrays.fill(visCodeBitFrequencies, 0);
for (int j = 0; j < 10; ++j)
for (int i = transitionSamples; i < visCodeBitSamples - transitionSamples; ++i)
visCodeBitFreqs[j] += scanLineBuffer[syncPulseIndex + leaderToneSamples + visCodeBitSamples * j + i] - freqOffset;
visCodeBitFrequencies[j] += scanLineBuffer[syncPulseIndex + leaderToneSamples + visCodeBitSamples * j + i] - leaderFreqOffset;
for (int i = 0; i < 10; ++i)
visCodeBitFreqs[i] = visCodeBitFreqs[i] * halfBandWidth / (visCodeBitSamples - 2 * transitionSamples) + centerFreq;
if (visCodeBitFreqs[0] < 1150 || visCodeBitFreqs[0] > 1250 || visCodeBitFreqs[9] < 1150 || visCodeBitFreqs[9] > 1250)
visCodeBitFrequencies[i] = visCodeBitFrequencies[i] * halfBandWidth / (visCodeBitSamples - 2 * transitionSamples) + centerFreq;
if (visCodeBitFrequencies[0] < 1150 || visCodeBitFrequencies[0] > 1250 || visCodeBitFrequencies[9] < 1150 || visCodeBitFrequencies[9] > 1250)
return false;
for (int i = 1; i < 9; ++i)
if (visCodeBitFreqs[i] < 1050 || visCodeBitFreqs[i] > 1150 && visCodeBitFreqs[i] < 1250 || visCodeBitFreqs[i] > 1350)
if (visCodeBitFrequencies[i] < 1050 || visCodeBitFrequencies[i] > 1150 && visCodeBitFrequencies[i] < 1250 || visCodeBitFrequencies[i] > 1350)
return false;
visCode = 0;
for (int i = 0; i < 8; ++i)
visCode |= (visCodeBitFreqs[i + 1] < 1200 ? 1 : 0) << i;
visCode |= (visCodeBitFrequencies[i + 1] < 1200 ? 1 : 0) << i;
boolean check = true;
for (int i = 0; i < 8; ++i)
check ^= (visCode & 1 << i) != 0;
@ -326,8 +325,26 @@ public class Decoder {
return false;
}
}
if (detectHeader(last9msSyncPulses[last9msSyncPulses.length - 1]))
Log.d("Robot36", "VIS mode: " + findMode(visCode).getName());
if (detectHeader(last9msSyncPulses[last9msSyncPulses.length - 1])) {
Mode visMode = findMode(visCode);
if (visMode != rawMode) {
lastMode = visMode;
lastSyncPulseIndex = last9msSyncPulses[last9msSyncPulses.length - 1] + leaderToneSamples + visCodeSamples + visMode.getFirstSyncPulseIndex();
lastScanLineSamples = visMode.getScanLineSamples();
lastFrequencyOffset = leaderFreqOffset;
int shift = lastSyncPulseIndex - scanLineReserveSamples;
if (shift > scanLineReserveSamples) {
lastSyncPulseIndex -= shift;
adjustSyncPulses(last5msSyncPulses, shift);
adjustSyncPulses(last9msSyncPulses, shift);
adjustSyncPulses(last20msSyncPulses, shift);
int endSample = curSample;
curSample = 0;
for (int i = shift; i < endSample; ++i)
scanLineBuffer[curSample++] = scanLineBuffer[i];
}
}
}
if (lastSyncPulseIndex >= scanLineReserveSamples && curSample > lastSyncPulseIndex + (lastScanLineSamples * 5) / 4) {
copyLines(lastMode.decodeScanLine(pixelBuffer, scratchBuffer, scanLineBuffer, scopeBuffer.width, lastSyncPulseIndex, lastScanLineSamples, lastFrequencyOffset));
lastSyncPulseIndex += lastScanLineSamples;

2
app/src/main/java/xdsopl/robot36/Mode.java
View file

@ -11,6 +11,8 @@ public interface Mode {
int getCode();
int getFirstSyncPulseIndex();
int getScanLineSamples();
boolean decodeScanLine(PixelBuffer pixelBuffer, float[] scratchBuffer, float[] scanLineBuffer, int scopeBufferWidth, int syncPulseIndex, int scanLineSamples, float frequencyOffset);

7
app/src/main/java/xdsopl/robot36/PaulDon.java
View file

@ -9,6 +9,7 @@ package xdsopl.robot36;
public class PaulDon implements Mode {
private final ExponentialMovingAverage lowPassFilter;
private final int horizontalPixels;
private final int firstSyncPulseIndex;
private final int scanLineSamples;
private final int channelSamples;
private final int beginSamples;
@ -27,6 +28,7 @@ public class PaulDon implements Mode {
this.horizontalPixels = horizontalPixels;
double syncPulseSeconds = 0.02;
double syncPorchSeconds = 0.00208;
firstSyncPulseIndex = (int) Math.round(syncPulseSeconds * sampleRate);
double scanLineSeconds = syncPulseSeconds + syncPorchSeconds + 4 * (channelSeconds);
scanLineSamples = (int) Math.round(scanLineSeconds * sampleRate);
channelSamples = (int) Math.round(channelSeconds * sampleRate);
@ -58,6 +60,11 @@ public class PaulDon implements Mode {
return code;
}
@Override
public int getFirstSyncPulseIndex() {
return firstSyncPulseIndex;
}
@Override
public int getScanLineSamples() {
return scanLineSamples;

9
app/src/main/java/xdsopl/robot36/RGBDecoder.java
View file

@ -9,6 +9,7 @@ package xdsopl.robot36;
public class RGBDecoder implements Mode {
private final ExponentialMovingAverage lowPassFilter;
private final int horizontalPixels;
private final int firstSyncPulseIndex;
private final int scanLineSamples;
private final int beginSamples;
private final int redBeginSamples;
@ -21,10 +22,11 @@ public class RGBDecoder implements Mode {
private final String name;
private final int code;
RGBDecoder(String name, int code, int horizontalPixels, double scanLineSeconds, double beginSeconds, double redBeginSeconds, double redEndSeconds, double greenBeginSeconds, double greenEndSeconds, double blueBeginSeconds, double blueEndSeconds, double endSeconds, int sampleRate) {
RGBDecoder(String name, int code, int horizontalPixels, double firstSyncPulseSeconds, double scanLineSeconds, double beginSeconds, double redBeginSeconds, double redEndSeconds, double greenBeginSeconds, double greenEndSeconds, double blueBeginSeconds, double blueEndSeconds, double endSeconds, int sampleRate) {
this.name = name;
this.code = code;
this.horizontalPixels = horizontalPixels;
firstSyncPulseIndex = (int) Math.round(firstSyncPulseSeconds * sampleRate);
scanLineSamples = (int) Math.round(scanLineSeconds * sampleRate);
beginSamples = (int) Math.round(beginSeconds * sampleRate);
redBeginSamples = (int) Math.round(redBeginSeconds * sampleRate) - beginSamples;
@ -51,6 +53,11 @@ public class RGBDecoder implements Mode {
return code;
}
@Override
public int getFirstSyncPulseIndex() {
return firstSyncPulseIndex;
}
@Override
public int getScanLineSamples() {
return scanLineSamples;

7
app/src/main/java/xdsopl/robot36/RGBModes.java
View file

@ -19,12 +19,13 @@ public final class RGBModes {
double blueEndSeconds = blueBeginSeconds + channelSeconds;
double redBeginSeconds = blueEndSeconds + separatorSeconds;
double redEndSeconds = redBeginSeconds + channelSeconds;
return new RGBDecoder("Martin " + name, code, 320, scanLineSeconds, greenBeginSeconds, redBeginSeconds, redEndSeconds, greenBeginSeconds, greenEndSeconds, blueBeginSeconds, blueEndSeconds, redEndSeconds, sampleRate);
return new RGBDecoder("Martin " + name, code, 320, syncPulseSeconds, scanLineSeconds, greenBeginSeconds, redBeginSeconds, redEndSeconds, greenBeginSeconds, greenEndSeconds, blueBeginSeconds, blueEndSeconds, redEndSeconds, sampleRate);
}
public static RGBDecoder Scottie(String name, int code, double channelSeconds, int sampleRate) {
double syncPulseSeconds = 0.009;
double separatorSeconds = 0.0015;
double firstSyncPulseSeconds = 2 * (syncPulseSeconds + separatorSeconds + channelSeconds);
double scanLineSeconds = syncPulseSeconds + 3 * (channelSeconds + separatorSeconds);
double blueEndSeconds = -syncPulseSeconds;
double blueBeginSeconds = blueEndSeconds - channelSeconds;
@ -32,7 +33,7 @@ public final class RGBModes {
double greenBeginSeconds = greenEndSeconds - channelSeconds;
double redBeginSeconds = separatorSeconds;
double redEndSeconds = redBeginSeconds + channelSeconds;
return new RGBDecoder("Scottie " + name, code, 320, scanLineSeconds, greenBeginSeconds, redBeginSeconds, redEndSeconds, greenBeginSeconds, greenEndSeconds, blueBeginSeconds, blueEndSeconds, redEndSeconds, sampleRate);
return new RGBDecoder("Scottie " + name, code, 320, firstSyncPulseSeconds, scanLineSeconds, greenBeginSeconds, redBeginSeconds, redEndSeconds, greenBeginSeconds, greenEndSeconds, blueBeginSeconds, blueEndSeconds, redEndSeconds, sampleRate);
}
public static RGBDecoder Wraase_SC2_180(int sampleRate) {
@ -46,6 +47,6 @@ public final class RGBModes {
double greenEndSeconds = greenBeginSeconds + channelSeconds;
double blueBeginSeconds = greenEndSeconds;
double blueEndSeconds = blueBeginSeconds + channelSeconds;
return new RGBDecoder("Wraase SC2-180", 55, 320, scanLineSeconds, redBeginSeconds, redBeginSeconds, redEndSeconds, greenBeginSeconds, greenEndSeconds, blueBeginSeconds, blueEndSeconds, blueEndSeconds, sampleRate);
return new RGBDecoder("Wraase SC2-180", 55, 320, syncPulseSeconds, scanLineSeconds, redBeginSeconds, redBeginSeconds, redEndSeconds, greenBeginSeconds, greenEndSeconds, blueBeginSeconds, blueEndSeconds, blueEndSeconds, sampleRate);
}
}

5
app/src/main/java/xdsopl/robot36/RawDecoder.java
View file

@ -31,6 +31,11 @@ public class RawDecoder implements Mode {
return -1;
}
@Override
public int getFirstSyncPulseIndex() {
return -1;
}
@Override
public int getScanLineSamples() {
return -1;

7
app/src/main/java/xdsopl/robot36/Robot_36_Color.java
View file

@ -9,6 +9,7 @@ package xdsopl.robot36;
public class Robot_36_Color implements Mode {
private final ExponentialMovingAverage lowPassFilter;
private final int horizontalPixels;
private final int firstSyncPulseIndex;
private final int scanLineSamples;
private final int luminanceSamples;
private final int separatorSamples;
@ -29,6 +30,7 @@ public class Robot_36_Color implements Mode {
double separatorSeconds = 0.0045;
double porchSeconds = 0.0015;
double chrominanceSeconds = 0.044;
firstSyncPulseIndex = (int) Math.round(syncPulseSeconds * sampleRate);
double scanLineSeconds = syncPulseSeconds + syncPorchSeconds + luminanceSeconds + separatorSeconds + porchSeconds + chrominanceSeconds;
scanLineSamples = (int) Math.round(scanLineSeconds * sampleRate);
luminanceSamples = (int) Math.round(luminanceSeconds * sampleRate);
@ -61,6 +63,11 @@ public class Robot_36_Color implements Mode {
return 8;
}
@Override
public int getFirstSyncPulseIndex() {
return firstSyncPulseIndex;
}
@Override
public int getScanLineSamples() {
return scanLineSamples;

7
app/src/main/java/xdsopl/robot36/Robot_72_Color.java
View file

@ -9,6 +9,7 @@ package xdsopl.robot36;
public class Robot_72_Color implements Mode {
private final ExponentialMovingAverage lowPassFilter;
private final int horizontalPixels;
private final int firstSyncPulseIndex;
private final int scanLineSamples;
private final int luminanceSamples;
private final int chrominanceSamples;
@ -27,6 +28,7 @@ public class Robot_72_Color implements Mode {
double separatorSeconds = 0.0045;
double porchSeconds = 0.0015;
double chrominanceSeconds = 0.069;
firstSyncPulseIndex = (int) Math.round(syncPulseSeconds * sampleRate);
double scanLineSeconds = syncPulseSeconds + syncPorchSeconds + luminanceSeconds + 2 * (separatorSeconds + porchSeconds + chrominanceSeconds);
scanLineSamples = (int) Math.round(scanLineSeconds * sampleRate);
luminanceSamples = (int) Math.round(luminanceSeconds * sampleRate);
@ -59,6 +61,11 @@ public class Robot_72_Color implements Mode {
return 12;
}
@Override
public int getFirstSyncPulseIndex() {
return firstSyncPulseIndex;
}
@Override
public int getScanLineSamples() {
return scanLineSamples;