X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fdecoder.cc;h=0f2bc4358008e62123e8e042a8247c142e317c71;hb=36ce958a516567d8481163692c028a88c6ce0df7;hp=61e63460bae8469d4650e6fa65932ef8b4a74fef;hpb=602fd58eff38fdfccc489b9f77b3ff0ca0009566;p=dcpomatic.git

diff --git a/src/lib/decoder.cc b/src/lib/decoder.cc
index 61e63460b..0f2bc4358 100644
--- a/src/lib/decoder.cc
+++ b/src/lib/decoder.cc
@@ -1,77 +1,103 @@
 /*
-    Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2012-2018 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    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.
 
-    This program is distributed in the hope that it will be useful,
+    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 this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
-/** @file  src/decoder.cc
- *  @brief Parent class for decoders of content.
- */
-
-#include <iostream>
-#include <stdint.h>
-#include <boost/lexical_cast.hpp>
-#include "film.h"
-#include "format.h"
-#include "job.h"
-#include "options.h"
-#include "exceptions.h"
-#include "image.h"
-#include "util.h"
-#include "log.h"
 #include "decoder.h"
-#include "delay_line.h"
-#include "subtitle.h"
-#include "filter_graph.h"
-
-using std::string;
-using std::stringstream;
-using std::min;
-using std::pair;
-using std::list;
-using boost::shared_ptr;
+#include "video_decoder.h"
+#include "audio_decoder.h"
+#include "text_decoder.h"
+#include <boost/optional.hpp>
+#include <iostream>
+
+using std::cout;
 using boost::optional;
+using boost::shared_ptr;
+using boost::weak_ptr;
+using namespace dcpomatic;
+
+Decoder::Decoder (weak_ptr<const Film> film)
+	: _film (film)
+{
+
+}
+
+/** @return Earliest time of content that the next pass() will emit */
+ContentTime
+Decoder::position () const
+{
+	optional<ContentTime> pos;
+	shared_ptr<const Film> f = film();
+
+	if (video && !video->ignore() && (!pos || video->position(f).get_value_or(ContentTime()) < *pos)) {
+		pos = video->position(f);
+	}
+
+	if (audio && !audio->ignore() && (!pos || audio->position(f).get_value_or(ContentTime()) < *pos)) {
+		pos = audio->position(f);
+	}
+
+	/* Only decide position based on subtitle sources if there is nothing else
+	   to go on.  Otherwise we can have problems with muxed sources which have
+	   (for example) video, audio and a subtitle.  If the subtitle data runs out
+	   before the video/audio the position() call will return the position of the
+	   end of the subs.  This causes this file to be pass()ed in favour of others,
+	   which can cause bugs like #1581.
+	*/
+	if (!pos) {
+		BOOST_FOREACH (shared_ptr<TextDecoder> i, text) {
+			if (!i->ignore() && (!pos || i->position(f) < *pos)) {
+				pos = i->position(f);
+			}
+		}
+	}
+
+	return pos.get_value_or(ContentTime());
+}
 
-/** @param f Film.
- *  @param o Options.
- *  @param j Job that we are running within, or 0
- */
-Decoder::Decoder (boost::shared_ptr<Film> f, boost::shared_ptr<const DecodeOptions> o, Job* j)
-	: _film (f)
-	, _opt (o)
-	, _job (j)
+void
+Decoder::seek (ContentTime, bool)
 {
-	_film_connection = f->Changed.connect (bind (&Decoder::film_changed, this, _1));
+	if (video) {
+		video->seek ();
+	}
+	if (audio) {
+		audio->seek ();
+	}
+	BOOST_FOREACH (shared_ptr<TextDecoder> i, text) {
+		i->seek ();
+	}
 }
 
-/** Seek.
- *  @param p Position as a source timestamp in seconds.
- *  @return true on error.
- */
-bool
-Decoder::seek (double p)
+shared_ptr<TextDecoder>
+Decoder::only_text () const
 {
-	throw DecodeError ("decoder does not support seek");
+	DCPOMATIC_ASSERT (text.size() < 2);
+	if (text.empty ()) {
+		return shared_ptr<TextDecoder> ();
+	}
+	return text.front ();
 }
 
-/** Seek so that the next frame we will produce is the same as the last one.
- *  @return true on error.
- */
-bool
-Decoder::seek_to_last ()
+shared_ptr<const Film>
+Decoder::film () const
 {
-	throw DecodeError ("decoder does not support seek");
+	shared_ptr<const Film> f = _film.lock ();
+	DCPOMATIC_ASSERT (f);
+	return f;
 }