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_buffers.h
21 * @brief AudioBuffers class.
24 #ifndef DCPOMATIC_AUDIO_BUFFERS_H
25 #define DCPOMATIC_AUDIO_BUFFERS_H
27 #include <boost/shared_ptr.hpp>
29 /** @class AudioBuffers
30 * @brief A class to hold multi-channel audio data in float format.
35 AudioBuffers (int channels, int frames);
36 AudioBuffers (AudioBuffers const &);
37 AudioBuffers (boost::shared_ptr<const AudioBuffers>);
40 AudioBuffers & operator= (AudioBuffers const &);
42 boost::shared_ptr<AudioBuffers> clone () const;
43 boost::shared_ptr<AudioBuffers> channel (int) const;
45 void ensure_size (int);
47 float** data () const {
51 float* data (int) const;
53 int channels () const {
61 void set_frames (int f);
64 void make_silent (int c);
65 void make_silent (int from, int frames);
67 void apply_gain (float);
69 void copy_from (AudioBuffers const * from, int frames_to_copy, int read_offset, int write_offset);
70 void copy_channel_from (AudioBuffers const * from, int from_channel, int to_channel);
71 void move (int from, int to, int frames);
72 void accumulate_channel (AudioBuffers const * from, int from_channel, int to_channel, float gain = 1);
73 void accumulate_frames (AudioBuffers const *, int read_offset, int write_offset, int frames);
76 void allocate (int, int);
79 /** Number of channels */
81 /** Number of frames (where a frame is one sample across all channels) */
83 /** Number of frames that _data can hold */
84 int _allocated_frames;
85 /** Audio data (so that, e.g. _data[2][6] is channel 2, sample 6) */