Use an enum instead of a bool to specify blocking/non-blocking.

[dcpomatic.git] / src / wx / video_view.cc

diff --git a/src/wx/video_view.cc b/src/wx/video_view.cc
index eb85079c3795285adf4f5548ff94f86ea4f5e91d..1c645f11f688bd6adab4924c07ad9b0fcd25811c 100644 (file)
--- 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 +18,171 @@
 
 */
 
+
 #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::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 ? Butler::Behaviour::NON_BLOCKING : Butler::Behaviour::BLOCKING, &e);
+               if (e.code == Butler::Error::Code::DIED) {
+                       LOG_ERROR ("Butler died with %1", e.summary());
+               }
+               if (!pv.first) {
+                       return e.code == Butler::Error::Code::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)));
+       }
+}
+
+
+wxColour
+VideoView::pad_colour () const
+{
+       if (_viewer->pad_black()) {
+               return wxColour(0, 0, 0);
+       } else if (gui_is_dark()) {
+               return wxColour(50, 50, 50);
+       } else {
+               return wxColour(240, 240, 240);
+       }
+}
+