From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Thu, 27 Sep 2018 19:02:56 +0000 (+0200)
Subject: Drop frames if the player runs too far behind.
X-Git-Tag: 1.8.0~76^2~87
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=1aab0848ee4807a0369656edd9eb42ce5adb56ae;p=nageru

Drop frames if the player runs too far behind.
---

diff --git a/player.cpp b/player.cpp
index 1eea8d7..1e57ded 100644
--- a/player.cpp
+++ b/player.cpp
@@ -97,6 +97,13 @@ void Player::thread_func(bool also_output_to_stream)
 			int64_t in_pts = lrint(in_pts_origin + TIMEBASE * frameno * speed / output_framerate);
 			pts = lrint(out_pts);
 
+			steady_clock::duration time_behind = steady_clock::now() - next_frame_start;
+			if (time_behind >= milliseconds(200)) {
+				fprintf(stderr, "WARNING: %ld ms behind, dropping a frame (no matter the type).\n",
+					lrint(1e3 * duration<double>(time_behind).count()));
+				continue;
+			}
+
 			int64_t in_pts_lower, in_pts_upper;
 
 			// Find the frame immediately before and after this point.
@@ -171,6 +178,12 @@ void Player::thread_func(bool also_output_to_stream)
 				continue;
 			}
 
+			if (time_behind >= milliseconds(100)) {
+				fprintf(stderr, "WARNING: %ld ms behind, dropping an interpolated frame.\n",
+					lrint(1e3 * duration<double>(time_behind).count()));
+				continue;
+			}
+
 			double alpha = double(in_pts - in_pts_lower) / (in_pts_upper - in_pts_lower);
 
 			if (video_stream == nullptr) {