From a33553ccfae5d2e7a355e666ed97aa34565d2091 Mon Sep 17 00:00:00 2001
From: Julian Picht <julian.picht@gmail.com>
Date: Tue, 20 Dec 2016 02:22:17 +0100
Subject: first shot at disambiguator

now it's past 2am and I need to sleeeeeeeep
---
 tools/disambiguate/.gitignore     |  2 +
 tools/disambiguate/Makefile       |  5 +++
 tools/disambiguate/disambiguate.c | 90 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 97 insertions(+)
 create mode 100644 tools/disambiguate/.gitignore
 create mode 100644 tools/disambiguate/Makefile
 create mode 100644 tools/disambiguate/disambiguate.c

(limited to 'tools')

diff --git a/tools/disambiguate/.gitignore b/tools/disambiguate/.gitignore
new file mode 100644
index 0000000..22f3a02
--- /dev/null
+++ b/tools/disambiguate/.gitignore
@@ -0,0 +1,2 @@
+disambiguate
+raw_light_data_from_watchman.csv
diff --git a/tools/disambiguate/Makefile b/tools/disambiguate/Makefile
new file mode 100644
index 0000000..dd5a42b
--- /dev/null
+++ b/tools/disambiguate/Makefile
@@ -0,0 +1,5 @@
+disambiguate: disambiguate.c
+	gcc -g -o $@ $^ -lm
+
+test: disambiguate
+	./disambiguate | head -n 100
diff --git a/tools/disambiguate/disambiguate.c b/tools/disambiguate/disambiguate.c
new file mode 100644
index 0000000..30034f9
--- /dev/null
+++ b/tools/disambiguate/disambiguate.c
@@ -0,0 +1,90 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+long times[64];
+int scores[64];
+
+void discard(long age) {
+	for (int i = 0; i < sizeof(times)/sizeof(times[0]); ++i) {
+		if (times[i] != 0 && times[i] < age) {
+			times[i] = 0;
+			scores[i] = 0;
+		}
+	}
+}
+
+int findNearest(long time) {
+	int diff = 1000; // max allowed diff for a match
+	int idx = -1;
+	for (int i = 0; i < sizeof(times)/sizeof(times[0]); ++i) {
+		if (times[i] == 0) continue;
+
+		int a = abs(times[i] - time);
+		if (a < diff) {
+			idx = i;
+			diff = a;
+		}
+
+	}
+
+	//printf("DIFF: %d %d\n", diff, idx);
+
+	return idx;
+}
+
+int main() {
+
+	FILE * f = fopen( "raw_light_data_from_watchman.csv", "r" );
+	if (f == NULL) {
+		fprintf(stderr, "ERROR OPENING INPUT FILE\n");
+		return -1;
+	}
+	memset(&times, 0, sizeof( times ));
+	memset(&scores, 0, sizeof( scores ));
+
+	long offset = 0, last = 0;
+
+	for (;;) {
+		char controller[10];
+		int sensor;
+		int unknown;
+		int length;
+		long time;
+		if (fscanf(f, "%s %d %d %d %li", controller, &sensor, &unknown, &length, &time) != 5) {
+			break;
+		}
+		/*if (time - last < 10000) {
+			offset += 0x100000000;
+		}*/
+		time += offset;
+		last = time;
+
+		if (length < 2750) continue;
+
+		discard(time - 10000000);
+		int idx = findNearest(time - 800000);
+		if (idx == -1) {
+			for (int i = 0; i < sizeof(times)/sizeof(times[0]); ++i) {
+				if (times[i] == 0) {
+//					printf("ADD: %d %li\n", i, time);
+					times[i] = time;
+					break;
+				}
+			}
+		} else {
+			double l = length;
+			char cc = round(l / 500) - 6;
+			printf("MATCH: %li %d %d (0b%d%d%d)\n", time - times[idx], scores[idx], length, (cc >> 2) & 0x1, (cc >> 1) & 0x1, cc & 0x1);
+			scores[idx]++;
+			if (scores[idx] >= 30) {
+				printf("MATCH: %li %d\n", time - times[idx], scores[idx]);
+				return 0;
+			}
+			times[idx] = time;
+		}
+	}
+	fclose(f);
+}
+
-- 
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