Speed some operations by re-using the last PlayerVideo but with

[dcpomatic.git] / src / lib / video_decoder.cc

diff --git a/src/lib/video_decoder.cc b/src/lib/video_decoder.cc
index 906f92ef1637b3c6fd57ec460c92cbe7f8f32574..3625e074fba0460fc63729a00bc30c446f7d769b 100644 (file)
--- a/src/lib/video_decoder.cc
+++ b/src/lib/video_decoder.cc
@@ -1,79 +1,106 @@
+/*
+    Copyright (C) 2012-2018 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    DCP-o-matic is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
 #include "video_decoder.h"
-#include "subtitle.h"
-#include "film.h"
 #include "image.h"
+#include "raw_image_proxy.h"
+#include "film.h"
 #include "log.h"
-#include "options.h"
-#include "job.h"
+#include "compose.hpp"
+#include <boost/foreach.hpp>
+#include <iostream>
+
+#include "i18n.h"
 
+using std::cout;
+using std::list;
+using std::max;
+using std::back_inserter;
 using boost::shared_ptr;
 using boost::optional;
 
-VideoDecoder::VideoDecoder (shared_ptr<Film> f, shared_ptr<const Options> o, Job* j)
-       : Decoder (f, o, j)
-       , _video_frame (0)
+VideoDecoder::VideoDecoder (Decoder* parent, shared_ptr<const Content> c, shared_ptr<Log> log)
+       : DecoderPart (parent, log)
+       , _content (c)
 {
 
 }
 
-/** Called by subclasses to tell the world that some video data is ready.
- *  We find a subtitle then emit it for listeners.
- *  @param frame to decode; caller manages memory.
+/** Called by decoder classes when they have a video frame ready.
+ *  @param frame Frame index within the content; this does not take into account 3D
+ *  so for 3D_ALTERNATE this value goes:
+ *     0: frame 0 left
+ *     1: frame 0 right
+ *     2: frame 1 left
+ *     3: frame 1 right
+ *  and so on.
  */
 void
-VideoDecoder::emit_video (shared_ptr<Image> image)
+VideoDecoder::emit (shared_ptr<const ImageProxy> image, Frame frame)
 {
-       shared_ptr<Subtitle> sub;
-       if (_timed_subtitle && _timed_subtitle->displayed_at (double (video_frame()) / _film->frames_per_second())) {
-               sub = _timed_subtitle->subtitle ();
+       if (ignore ()) {
+               return;
        }
 
-       signal_video (image, sub);
-}
-
-void
-VideoDecoder::repeat_last_video ()
-{
-       if (!_last_image) {
-               _last_image.reset (new CompactImage (pixel_format(), native_size()));
-               _last_image->make_black ();
+       switch (_content->video->frame_type ()) {
+       case VIDEO_FRAME_TYPE_2D:
+               Data (ContentVideo (image, frame, EYES_BOTH, PART_WHOLE));
+               break;
+       case VIDEO_FRAME_TYPE_3D:
+       {
+               /* We receive the same frame index twice for 3D; hence we know which
+                  frame this one is.
+               */
+               bool const same = (_last_emitted && _last_emitted.get() == frame);
+               Data (ContentVideo (image, frame, same ? EYES_RIGHT : EYES_LEFT, PART_WHOLE));
+               _last_emitted = frame;
+               break;
        }
-
-       signal_video (_last_image, _last_subtitle);
-}
-
-void
-VideoDecoder::signal_video (shared_ptr<Image> image, shared_ptr<Subtitle> sub)
-{
-       TIMING ("Decoder emits %1", _video_frame);
-       Video (image, sub);
-       ++_video_frame;
-
-       _last_image = image;
-       _last_subtitle = sub;
-}
-
-void
-VideoDecoder::emit_subtitle (shared_ptr<TimedSubtitle> s)
-{
-       _timed_subtitle = s;
-       
-       if (_timed_subtitle && _opt->apply_crop) {
-               Position const p = _timed_subtitle->subtitle()->position ();
-               _timed_subtitle->subtitle()->set_position (Position (p.x - _film->crop().left, p.y - _film->crop().top));
+       case VIDEO_FRAME_TYPE_3D_ALTERNATE:
+               Data (ContentVideo (image, frame / 2, (frame % 2) ? EYES_RIGHT : EYES_LEFT, PART_WHOLE));
+               frame /= 2;
+               break;
+       case VIDEO_FRAME_TYPE_3D_LEFT_RIGHT:
+               Data (ContentVideo (image, frame, EYES_LEFT, PART_LEFT_HALF));
+               Data (ContentVideo (image, frame, EYES_RIGHT, PART_RIGHT_HALF));
+               break;
+       case VIDEO_FRAME_TYPE_3D_TOP_BOTTOM:
+               Data (ContentVideo (image, frame, EYES_LEFT, PART_TOP_HALF));
+               Data (ContentVideo (image, frame, EYES_RIGHT, PART_BOTTOM_HALF));
+               break;
+       case VIDEO_FRAME_TYPE_3D_LEFT:
+               Data (ContentVideo (image, frame, EYES_LEFT, PART_WHOLE));
+               break;
+       case VIDEO_FRAME_TYPE_3D_RIGHT:
+               Data (ContentVideo (image, frame, EYES_RIGHT, PART_WHOLE));
+               break;
+       default:
+               DCPOMATIC_ASSERT (false);
        }
-}
 
-void
-VideoDecoder::set_subtitle_stream (optional<SubtitleStream> s)
-{
-       _subtitle_stream = s;
+       _position = ContentTime::from_frames (frame, _content->active_video_frame_rate ());
 }
 
 void
-VideoDecoder::set_progress () const
+VideoDecoder::seek ()
 {
-       if (_job && _film->dcp_length()) {
-               _job->set_progress (float (_video_frame) / _film->length().get());
-       }
+       _position = ContentTime();
+       _last_emitted.reset ();
 }