X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=decklink_output.cpp;h=2285bb2a7ceed3b7ac1237224447f8c70ce78380;hb=1865abf9f8180e466513913c9433eb0e206c77f3;hp=544e2edd333017d080b989a859004ba0f04bd6e4;hpb=017c260b96736e797fee120107b85c4c7fc81aa1;p=nageru

diff --git a/decklink_output.cpp b/decklink_output.cpp
index 544e2ed..2285bb2 100644
--- a/decklink_output.cpp
+++ b/decklink_output.cpp
@@ -2,6 +2,7 @@
 #include <movit/util.h>
 #include <movit/resource_pool.h>  // Must be above the Xlib includes.
 #include <pthread.h>
+#include <unistd.h>
 
 #include <mutex>
 
@@ -11,6 +12,7 @@
 #include "decklink_output.h"
 #include "decklink_util.h"
 #include "flags.h"
+#include "metrics.h"
 #include "print_latency.h"
 #include "timebase.h"
 #include "v210_converter.h"
@@ -44,6 +46,8 @@ atomic<int64_t> metric_decklink_output_completed_frames_unknown{0};
 
 atomic<int64_t> metric_decklink_output_scheduled_samples{0};
 
+Summary metric_decklink_output_margin_seconds;
+
 }  // namespace
 
 DeckLinkOutput::DeckLinkOutput(ResourcePool *resource_pool, QSurface *surface, unsigned width, unsigned height, unsigned card_index)
@@ -72,6 +76,9 @@ DeckLinkOutput::DeckLinkOutput(ResourcePool *resource_pool, QSurface *surface, u
 		global_metrics.add("decklink_output_completed_frames", {{ "status", "unknown" }}, &metric_decklink_output_completed_frames_unknown);
 
 		global_metrics.add("decklink_output_scheduled_samples", &metric_decklink_output_scheduled_samples);
+		vector<double> quantiles{0.01, 0.1, 0.25, 0.5, 0.75, 0.9, 0.99};
+		metric_decklink_output_margin_seconds.init(quantiles, 60.0);
+		global_metrics.add("decklink_output_margin_seconds", &metric_decklink_output_margin_seconds);
 	});
 }
 
@@ -262,7 +269,7 @@ void DeckLinkOutput::send_frame(GLuint y_tex, GLuint cbcr_tex, YCbCrLumaCoeffici
 		last_frame_had_mode_mismatch = false;
 	}
 
-	unique_ptr<Frame> frame = move(get_frame());
+	unique_ptr<Frame> frame = get_frame();
 	if (global_flags.ten_bit_output) {
 		chroma_subsampler->create_v210(y_tex, cbcr_tex, width, height, frame->uyvy_tex);
 	} else {
@@ -372,6 +379,9 @@ void DeckLinkOutput::wait_for_frame(int64_t pts, int *dropped_frames, int64_t *f
 	*frame_timestamp = steady_clock::now() +
 		nanoseconds((target_time - stream_frame_time) * 1000000000 / TIMEBASE);
 
+	metric_decklink_output_margin_seconds.count_event(
+		(target_time - stream_frame_time) / double(TIMEBASE));
+
 	// If we're ahead of time, wait for the frame to (approximately) start.
 	if (stream_frame_time < target_time) {
 		should_quit.sleep_until(*frame_timestamp);
@@ -543,7 +553,15 @@ void DeckLinkOutput::present_thread_func()
 			++metric_decklink_output_inflight_frames;
 		}
 
-		glClientWaitSync(frame->fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
+		for ( ;; ) {
+			int err = glClientWaitSync(frame->fence.get(), /*flags=*/0, 0);
+			if (err == GL_TIMEOUT_EXPIRED) {
+				// NVIDIA likes to busy-wait; yield instead.
+				this_thread::sleep_for(milliseconds(1));
+			} else {
+				break;
+			}
+		}
 		check_error();
 		frame->fence.reset();