2 Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 #include "audio_decoder.h"
22 #include "audio_buffers.h"
23 #include "audio_decoder_stream.h"
24 #include "audio_content.h"
26 #include "compose.hpp"
27 #include <boost/foreach.hpp>
34 using boost::shared_ptr;
35 using boost::optional;
37 AudioDecoder::AudioDecoder (Decoder* parent, shared_ptr<const AudioContent> content, shared_ptr<Log> log)
38 : DecoderPart (parent, log)
40 BOOST_FOREACH (AudioStreamPtr i, content->streams ()) {
41 _streams[i] = shared_ptr<AudioDecoderStream> (new AudioDecoderStream (content, i, parent, this, log));
46 AudioDecoder::emit (AudioStreamPtr stream, shared_ptr<const AudioBuffers> data, ContentTime time)
52 if (_streams.find (stream) == _streams.end ()) {
54 /* This method can be called with an unknown stream during the following sequence:
55 - Add KDM to some DCP content.
56 - Content gets re-examined.
57 - SingleStreamAudioContent::take_from_audio_examiner creates a new stream.
58 - Some content property change signal is delivered so Player::Changed is emitted.
59 - Film viewer to re-gets the frame.
60 - Player calls DCPDecoder pass which calls this method on the new stream.
62 At this point the AudioDecoder does not know about the new stream.
65 - Some other property change signal is delivered which marks the player's pieces invalid.
66 - Film viewer re-gets again.
69 In this situation it is fine for us to silently drop the audio.
75 _streams[stream]->audio (data, time);
76 _positions[stream] = time;
80 AudioDecoder::flush ()
82 for (StreamMap::const_iterator i = _streams.begin(); i != _streams.end(); ++i) {
88 AudioDecoder::set_fast ()
90 for (StreamMap::const_iterator i = _streams.begin(); i != _streams.end(); ++i) {
91 i->second->set_fast ();
96 AudioDecoder::position () const
98 optional<ContentTime> p;
99 for (map<AudioStreamPtr, ContentTime>::const_iterator i = _positions.begin(); i != _positions.end(); ++i) {
100 if (!p || i->second < *p) {