2 Copyright (C) 2016-2021 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/>.
22 #ifndef DCPOMATIC_AUDIO_RING_BUFFERS_H
23 #define DCPOMATIC_AUDIO_RING_BUFFERS_H
26 #include "audio_buffers.h"
28 #include "dcpomatic_time.h"
29 #include <boost/thread.hpp>
33 class AudioRingBuffers
38 AudioRingBuffers (AudioBuffers const&) = delete;
39 AudioRingBuffers& operator= (AudioBuffers const&) = delete;
41 void put (std::shared_ptr<const AudioBuffers> data, dcpomatic::DCPTime time, int frame_rate);
42 boost::optional<dcpomatic::DCPTime> get (float* out, int channels, int frames);
43 boost::optional<dcpomatic::DCPTime> peek () const;
46 /** @return number of frames currently available */
50 mutable boost::mutex _mutex;
51 std::list<std::pair<std::shared_ptr<const AudioBuffers>, dcpomatic::DCPTime> > _buffers;
52 int _used_in_head = 0;