2 Copyright (C) 2012-2014 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 /** @file src/lib/audio_decoder.h
21 * @brief Parent class for audio decoders.
24 #ifndef DCPOMATIC_AUDIO_DECODER_H
25 #define DCPOMATIC_AUDIO_DECODER_H
29 #include "audio_content.h"
30 #include "content_audio.h"
35 /** @class AudioDecoder.
36 * @brief Parent class for audio decoders.
38 class AudioDecoder : public virtual Decoder
41 AudioDecoder (boost::shared_ptr<const AudioContent>);
43 boost::shared_ptr<const AudioContent> audio_content () const {
44 return _audio_content;
47 /** Try to fetch some audio from a specific place in this content.
48 * @param frame Frame to start from.
49 * @param length Frames to get.
50 * @param accurate true to try hard to return frames from exactly `frame', false if we don't mind nearby frames.
51 * @return Time-stamped audio data which may or may not be from the location (and of the length) requested.
53 boost::shared_ptr<ContentAudio> get_audio (AudioFrame time, AudioFrame length, bool accurate);
57 void seek (ContentTime time, bool accurate);
58 void audio (boost::shared_ptr<const AudioBuffers>, ContentTime);
60 void reset_decoded_audio ();
61 void add (boost::shared_ptr<const AudioBuffers>);
63 boost::shared_ptr<const AudioContent> _audio_content;
64 boost::shared_ptr<Resampler> _resampler;
65 boost::shared_ptr<AudioProcessor> _processor;
66 boost::optional<AudioFrame> _audio_position;
67 /** Currently-available decoded audio data */
68 ContentAudio _decoded_audio;
69 /** The time of an accurate seek after which we have not yet received any actual
70 data at the seek time.
72 boost::optional<ContentTime> _seek_reference;