Basics of FFmpeg examiner works.

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

diff --git a/src/lib/black_decoder.cc b/src/lib/black_decoder.cc
index ef7458711a0a95c79b7da5a2ed40b843f745efef..0b231edd355cdd4bc93d06c31bc849cb8f3f2a78 100644 (file)
--- a/src/lib/black_decoder.cc
+++ b/src/lib/black_decoder.cc
@@ -1,7 +1,31 @@
+/*
+    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+
+    This program 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.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
 #include "black_decoder.h"
+#include "image.h"
+#include "null_content.h"
 
-BlackDecoder::BlackDecoder (shared_ptr<NullContent> c)
-       : Decoder (c)
+using boost::shared_ptr;
+
+BlackDecoder::BlackDecoder (shared_ptr<const Film> f, shared_ptr<NullContent> c)
+       : Decoder (f)
+       , VideoDecoder (f, c)
 {
 
 }
@@ -9,5 +33,70 @@ BlackDecoder::BlackDecoder (shared_ptr<NullContent> c)
 void
 BlackDecoder::pass ()
 {
-       
+       if (!_image) {
+               _image.reset (new SimpleImage (AV_PIX_FMT_RGB24, video_size(), true));
+               _image->make_black ();
+               video (_image, false, _next_video);
+       } else {
+               video (_image, true, _next_video);
+       }
+}
+
+float
+BlackDecoder::video_frame_rate () const
+{
+       boost::shared_ptr<const Film> f = _film.lock ();
+       if (!f) {
+               return 24;
+       }
+
+       return f->dcp_video_frame_rate ();
+}
+
+ContentVideoFrame
+BlackDecoder::video_length () const
+{
+       return _video_content->length() * video_frame_rate() / TIME_HZ;
+}
+
+Time
+BlackDecoder::position () const
+{
+       return _next_video;
+}
+
+void
+BlackDecoder::seek (Time t)
+{
+       _next_video = t;
+}
+
+void
+BlackDecoder::seek_back ()
+{
+       boost::shared_ptr<const Film> f = _film.lock ();
+       if (!f) {
+               return;
+       }
+
+       _next_video -= f->video_frames_to_time (2);
+}
+
+void
+BlackDecoder::seek_forward ()
+{
+       boost::shared_ptr<const Film> f = _film.lock ();
+       if (!f) {
+               return;
+       }
+
+       _next_video += f->video_frames_to_time (1);
 }
+
+bool
+BlackDecoder::done () const
+{
+       return video_done ();
+}
+
+