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 /** @file src/encoder.h
21 * @brief Parent class for classes which can encode video and audio frames.
27 using namespace boost;
29 int const Encoder::_history_size = 25;
31 /** @param f Film that we are encoding.
34 Encoder::Encoder (shared_ptr<const Film> f, shared_ptr<const Options> o)
37 , _just_skipped (false)
44 /** @return an estimate of the current number of frames we are encoding per second,
48 Encoder::current_frames_per_second () const
50 boost::mutex::scoped_lock lock (_history_mutex);
51 if (int (_time_history.size()) < _history_size) {
56 gettimeofday (&now, 0);
58 return _history_size / (seconds (now) - seconds (_time_history.back ()));
61 /** @return true if the last frame to be processed was skipped as it already existed */
63 Encoder::skipping () const
65 boost::mutex::scoped_lock (_history_mutex);
69 /** @return Index of last frame to be successfully encoded */
71 Encoder::last_frame () const
73 boost::mutex::scoped_lock (_history_mutex);
77 /** Should be called when a frame has been encoded successfully.
78 * @param n Frame index.
81 Encoder::frame_done (int n)
83 boost::mutex::scoped_lock lock (_history_mutex);
84 _just_skipped = false;
88 gettimeofday (&tv, 0);
89 _time_history.push_front (tv);
90 if (int (_time_history.size()) > _history_size) {
91 _time_history.pop_back ();
95 /** Called by a subclass when it has just skipped the processing
96 of a frame because it has already been done.
99 Encoder::frame_skipped ()
101 boost::mutex::scoped_lock lock (_history_mutex);
102 _just_skipped = true;