1 files changed, 87 insertions, 0 deletions
diff --git a/src/lib/silence_decoder.cc b/src/lib/silence_decoder.cc
new file mode 100644
index 000000000..c8aa5c632
--- /dev/null
+++ b/src/lib/silence_decoder.cc
@@ -0,0 +1,87 @@
+/*
+    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 "silence_decoder.h"
+#include "null_content.h"
+#include "audio_buffers.h"
+
+using std::min;
+using std::cout;
+using boost::shared_ptr;
+
+SilenceDecoder::SilenceDecoder (shared_ptr<const Film> f, shared_ptr<NullContent> c)
+	: Decoder (f)
+	, AudioDecoder (f, c)
+{
+	
+}
+
+void
+SilenceDecoder::pass ()
+{
+	shared_ptr<const Film> film = _film.lock ();
+	assert (film);
+
+	Time const this_time = min (_audio_content->length() - _next_audio, TIME_HZ / 2);
+	cout << "silence emit " << this_time << " from " << _audio_content->length() << "\n";
+	shared_ptr<AudioBuffers> data (new AudioBuffers (film->dcp_audio_channels(), film->time_to_audio_frames (this_time)));
+	data->make_silent ();
+	audio (data, _next_audio);
+}
+
+void
+SilenceDecoder::seek (Time t)
+{
+	_next_audio = t;
+}
+
+void
+SilenceDecoder::seek_back ()
+{
+	boost::shared_ptr<const Film> f = _film.lock ();
+	if (!f) {
+		return;
+	}
+
+	_next_audio -= f->video_frames_to_time (2);
+}
+
+void
+SilenceDecoder::seek_forward ()
+{
+	boost::shared_ptr<const Film> f = _film.lock ();
+	if (!f) {
+		return;
+	}
+
+	_next_audio += f->video_frames_to_time (1);
+}
+
+Time
+SilenceDecoder::next () const
+{
+	return _next_audio;
+}
+
+bool
+SilenceDecoder::done () const
+{
+	return audio_done ();
+}
+