X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=print_latency.cpp;fp=print_latency.cpp;h=0b0a1ae483e9bb2ce3ce6df15413942f89870b82;hb=63a912898083c06cc75f336f8d9a367a707e378a;hp=0000000000000000000000000000000000000000;hpb=112ce67402abfb6163403697c8a4f0fb736101ca;p=nageru

diff --git a/print_latency.cpp b/print_latency.cpp
new file mode 100644
index 0000000..0b0a1ae
--- /dev/null
+++ b/print_latency.cpp
@@ -0,0 +1,30 @@
+#include "print_latency.h"
+#include "flags.h"
+
+#include <stdio.h>
+#include <chrono>
+#include <string>
+
+using namespace std;
+using namespace std::chrono;
+
+void print_latency(const string &header, const ReceivedTimestamps &received_ts, bool is_b_frame, int *frameno)
+{
+	if (received_ts.max_ts == steady_clock::time_point::min())
+		return;
+
+	// 101 is chosen so that it's prime, which is unlikely to get the same frame type every time.
+	if (global_flags.print_video_latency && (++*frameno % 101) == 0) {
+		const steady_clock::time_point now = steady_clock::now();
+		printf("%-60s %4.0f ms (lowest-latency input), %4.0f ms (highest-latency input)",
+			header.c_str(),
+			1e3 * std::chrono::duration<double>(now - received_ts.max_ts).count(),
+			1e3 * std::chrono::duration<double>(now - received_ts.min_ts).count());
+
+		if (is_b_frame) {
+			printf("  [on B-frame; potential extra latency]\n");
+		} else {
+			printf("\n");
+		}
+	}
+}