Add a metric for general Futatabi player health (how much buffer there is left).

[nageru] / futatabi / player.cpp

diff --git a/futatabi/player.cpp b/futatabi/player.cpp
index 94438a0c9713dff414bbff2f3594f6666ff38b11..19868f486944fcf51bab9fec200437ab9fe9d88e 100644 (file)
--- a/futatabi/player.cpp
+++ b/futatabi/player.cpp
@@ -242,6 +242,7 @@ void Player::play_playlist_once()
                        }
 
                        steady_clock::duration time_behind = steady_clock::now() - next_frame_start;
+                       metric_player_ahead_seconds.count_event(-duration<double>(time_behind).count());
                        if (stream_output != FILE_STREAM_OUTPUT && 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()));
@@ -534,6 +535,10 @@ Player::Player(JPEGFrameView *destination, Player::StreamOutput stream_output, A
                global_metrics.add("http_output_frames", { { "type", "refresh" } }, &metric_refresh_frame);
                global_metrics.add("http_dropped_frames", { { "type", "interpolated" } }, &metric_dropped_interpolated_frame);
                global_metrics.add("http_dropped_frames", { { "type", "unconditional" } }, &metric_dropped_unconditional_frame);
+
+               vector<double> quantiles{ 0.01, 0.1, 0.25, 0.5, 0.75, 0.9, 0.99 };
+               metric_player_ahead_seconds.init(quantiles, 60.0);
+               global_metrics.add("player_ahead_seconds", &metric_player_ahead_seconds);
        }
 }