2 Copyright (C) 2012 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 "audio_decoder.h"
21 #include "audio_buffers.h"
22 #include "exceptions.h"
24 #include "resampler.h"
28 using std::stringstream;
32 using boost::optional;
33 using boost::shared_ptr;
35 AudioDecoder::AudioDecoder (shared_ptr<const Film> film, shared_ptr<const AudioContent> content)
37 , _audio_content (content)
44 AudioDecoder::audio (shared_ptr<const AudioBuffers> data, AudioContent::Frame frame)
47 _audio_position = frame + data->frames ();
50 /** This is a bit odd, but necessary when we have (e.g.) FFmpegDecoders with no audio.
51 * The player needs to know that there is no audio otherwise it will keep trying to
52 * pass() the decoder to get it to emit audio.
55 AudioDecoder::has_audio () const
57 return _audio_content->audio_channels () > 0;