X-Git-Url: https://git.sesse.net/?p=c64tapwav;a=blobdiff_plain;f=decode.cpp;h=0e88f9d85d73d55d5e5a55262c5f68f1b99acfcf;hp=1a5ee74856c5c635e37ea434213307114964be6c;hb=8bcb1606276bfbb87751e2c263a849b7c89bccb5;hpb=eb5c6ac462d461ce3929e9a82fdd5f33aa537923;ds=sidebyside

diff --git a/decode.cpp b/decode.cpp
index 1a5ee74..0e88f9d 100644
--- a/decode.cpp
+++ b/decode.cpp
@@ -1,8 +1,8 @@
 #include <stdio.h>
 #include <string.h>
 #include <math.h>
-#include <unistd.h>
 #include <assert.h>
+#include <limits.h>
 #include <vector>
 #include <algorithm>
 
@@ -41,7 +41,7 @@ double find_zerocrossing(const std::vector<short> &pcm, int x)
 
 	double upper = x;
 	double lower = x + 1;
-	while (upper - lower > 1e-6) {
+	while (lower - upper > 1e-3) {
 		double mid = 0.5f * (upper + lower);
 		if (lanczos_interpolate(pcm, mid) > 0) {
 			upper = mid;
@@ -60,6 +60,7 @@ struct pulse {
 	
 int main(int argc, char **argv)
 {
+	make_lanczos_weight_table();
 	std::vector<short> pcm;
 
 	while (!feof(stdin)) {
@@ -189,4 +190,20 @@ int main(int argc, char **argv)
 
 	fwrite(&hdr, sizeof(hdr), 1, stdout);
 	fwrite(tap_data.data(), tap_data.size(), 1, stdout);
+
+	// Output a debug raw file with pulse detection points.
+	fp = fopen("debug.raw", "wb");
+	short one = 32767;
+	short zero = 0;
+	unsigned pulsenum = 0;
+	for (unsigned i = 0; i < pcm.size(); ++i) {
+		unsigned next_pulse = (pulsenum >= pulses.size()) ? INT_MAX : int(pulses[pulsenum].time * SAMPLE_RATE);
+		if (i >= next_pulse) {
+			fwrite(&one, sizeof(one), 1, fp);
+			++pulsenum;
+		} else {
+			fwrite(&zero, sizeof(zero), 1, fp);
+		}
+	}
+	fclose(fp);
 }