2 Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "silence_decoder.h"
21 #include "null_content.h"
22 #include "audio_buffers.h"
26 using boost::shared_ptr;
28 SilenceDecoder::SilenceDecoder (shared_ptr<const Film> f, shared_ptr<NullContent> c)
36 SilenceDecoder::pass ()
38 shared_ptr<const Film> film = _film.lock ();
41 Time const this_time = min (_audio_content->length() - _next_audio, TIME_HZ / 2);
42 cout << "silence emit " << this_time << " from " << _audio_content->length() << "\n";
43 shared_ptr<AudioBuffers> data (new AudioBuffers (film->dcp_audio_channels(), film->time_to_audio_frames (this_time)));
45 audio (data, _next_audio);
49 SilenceDecoder::seek (Time t)
55 SilenceDecoder::seek_back ()
57 boost::shared_ptr<const Film> f = _film.lock ();
62 _next_audio -= f->video_frames_to_time (2);
66 SilenceDecoder::seek_forward ()
68 boost::shared_ptr<const Film> f = _film.lock ();
73 _next_audio += f->video_frames_to_time (1);
77 SilenceDecoder::position () const
83 SilenceDecoder::done () const