X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Fwx%2Fvideo_view.cc;h=387d4052fd87b1f02298b8c6ba8dbac083b43dc8;hb=a70ec9be6a312c63e7655b3a266cbf353e8e1795;hp=eb85079c3795285adf4f5548ff94f86ea4f5e91d;hpb=ac25cd82d5d29c79b46033a742aaea33c700a524;p=dcpomatic.git

diff --git a/src/wx/video_view.cc b/src/wx/video_view.cc
index eb85079c3..387d4052f 100644
--- a/src/wx/video_view.cc
+++ b/src/wx/video_view.cc
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2019 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2019-2021 Carl Hetherington <cth@carlh.net>
 
     This file is part of DCP-o-matic.
 
@@ -18,11 +18,158 @@
 
 */
 
+
 #include "video_view.h"
+#include "wx_util.h"
+#include "film_viewer.h"
+#include "lib/butler.h"
+#include "lib/dcpomatic_log.h"
+#include <boost/optional.hpp>
+#include <sys/time.h>
+
+
+using std::pair;
+using std::shared_ptr;
+using boost::optional;
+
+
+static constexpr int TOO_MANY_DROPPED_FRAMES = 20;
+static constexpr int TOO_MANY_DROPPED_PERIOD = 5.0;
+
+
+VideoView::VideoView (FilmViewer* viewer)
+	: _viewer (viewer)
+	, _state_timer ("viewer")
+{
+
+}
+
 
 void
 VideoView::clear ()
 {
+	boost::mutex::scoped_lock lm (_mutex);
 	_player_video.first.reset ();
 	_player_video.second = dcpomatic::DCPTime ();
 }
+
+
+/** Could be called from any thread.
+ *  @param non_blocking true to return false quickly if no video is available quickly.
+ *  @return FAIL if there's no frame, AGAIN if the method should be called again, or SUCCESS
+ *  if there is a frame.
+ */
+VideoView::NextFrameResult
+VideoView::get_next_frame (bool non_blocking)
+{
+	if (length() == dcpomatic::DCPTime()) {
+		return FAIL;
+	}
+
+	auto butler = _viewer->butler ();
+	if (!butler) {
+		return FAIL;
+	}
+	add_get ();
+
+	boost::mutex::scoped_lock lm (_mutex);
+
+	do {
+		Butler::Error e;
+		auto pv = butler->get_video (!non_blocking, &e);
+		if (e.code == Butler::Error::DIED) {
+			LOG_ERROR ("Butler died with %1", e.summary());
+		}
+		if (!pv.first) {
+			return e.code == Butler::Error::AGAIN ? AGAIN : FAIL;
+		}
+		_player_video = pv;
+	} while (
+		_player_video.first &&
+		_three_d &&
+		_eyes != _player_video.first->eyes() &&
+		_player_video.first->eyes() != Eyes::BOTH
+		);
+
+	if (_player_video.first && _player_video.first->error()) {
+		++_errored;
+	}
+
+	return SUCCESS;
+}
+
+
+dcpomatic::DCPTime
+VideoView::one_video_frame () const
+{
+	return dcpomatic::DCPTime::from_frames (1, video_frame_rate());
+}
+
+
+/** @return Time in ms until the next frame is due, or empty if nothing is due */
+optional<int>
+VideoView::time_until_next_frame () const
+{
+	if (length() == dcpomatic::DCPTime()) {
+		/* There's no content, so this doesn't matter */
+		return optional<int>();
+	}
+
+	auto const next = position() + one_video_frame();
+	auto const time = _viewer->audio_time().get_value_or(position());
+	if (next < time) {
+		return 0;
+	}
+	return (next.seconds() - time.seconds()) * 1000;
+}
+
+
+void
+VideoView::start ()
+{
+	boost::mutex::scoped_lock lm (_mutex);
+	_dropped = 0;
+	_errored = 0;
+	gettimeofday(&_dropped_check_period_start, nullptr);
+}
+
+
+bool
+VideoView::reset_metadata (shared_ptr<const Film> film, dcp::Size player_video_container_size)
+{
+	auto pv = player_video ();
+	if (!pv.first) {
+		return false;
+	}
+
+	if (!pv.first->reset_metadata(film, player_video_container_size)) {
+		return false;
+	}
+
+	update ();
+	return true;
+}
+
+
+void
+VideoView::add_dropped ()
+{
+	bool too_many = false;
+
+	{
+		boost::mutex::scoped_lock lm (_mutex);
+		++_dropped;
+		if (_dropped > TOO_MANY_DROPPED_FRAMES) {
+			struct timeval now;
+			gettimeofday (&now, nullptr);
+			double const elapsed = seconds(now) - seconds(_dropped_check_period_start);
+			too_many = elapsed < TOO_MANY_DROPPED_PERIOD;
+			_dropped = 0;
+			_dropped_check_period_start = now;
+		}
+	}
+
+	if (too_many) {
+		emit (boost::bind(boost::ref(TooManyDropped)));
+	}
+}