2 Copyright (C) 2017-2018 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 "ffmpeg_encoder.h"
25 #include "player_video.h"
30 #include "compose.hpp"
36 using std::runtime_error;
40 using boost::shared_ptr;
42 using boost::weak_ptr;
44 FFmpegEncoder::FFmpegEncoder (
45 shared_ptr<const Film> film,
47 boost::filesystem::path output,
49 bool mixdown_to_stereo,
56 int const files = split_reels ? film->reels().size() : 1;
57 for (int i = 0; i < files; ++i) {
59 boost::filesystem::path filename = output;
61 string extension = boost::filesystem::extension (filename);
62 filename = boost::filesystem::change_extension (filename, "");
63 /// TRANSLATORS: _reel%1.%2 here is to be added to an export filename to indicate
64 /// which reel it is. Preserve the %1 and %2; %1 will be replaced with the reel number
65 /// and %2 with the file extension.
66 filename = filename.string() + String::compose(_("_reel%1%2"), i + 1, extension);
69 _file_encoders.push_back (
70 shared_ptr<FFmpegFileEncoder>(
71 new FFmpegFileEncoder(
73 _film->video_frame_rate(),
74 _film->audio_frame_rate(),
75 mixdown_to_stereo ? 2 : film->audio_channels(),
85 _player->set_always_burn_open_subtitles ();
86 _player->set_play_referenced ();
88 int const ch = film->audio_channels ();
91 if (mixdown_to_stereo) {
92 _output_audio_channels = 2;
93 map = AudioMapping (ch, 2);
94 float const overall_gain = 2 / (4 + sqrt(2));
95 float const minus_3dB = 1 / sqrt(2);
96 map.set (dcp::LEFT, 0, overall_gain);
97 map.set (dcp::RIGHT, 1, overall_gain);
98 map.set (dcp::CENTRE, 0, overall_gain * minus_3dB);
99 map.set (dcp::CENTRE, 1, overall_gain * minus_3dB);
100 map.set (dcp::LS, 0, overall_gain);
101 map.set (dcp::RS, 1, overall_gain);
103 _output_audio_channels = ch;
104 map = AudioMapping (ch, ch);
105 for (int i = 0; i < ch; ++i) {
110 _butler.reset (new Butler (_player, film->log(), map, _output_audio_channels, bind(&PlayerVideo::force, _1, FFmpegFileEncoder::pixel_format(format)), true, false));
117 shared_ptr<Job> job = _job.lock ();
118 DCPOMATIC_ASSERT (job);
119 job->sub (_("Encoding"));
122 list<DCPTimePeriod> reel_periods = _film->reels ();
123 list<DCPTimePeriod>::const_iterator reel = reel_periods.begin ();
124 list<shared_ptr<FFmpegFileEncoder> >::iterator encoder = _file_encoders.begin ();
126 DCPTime const video_frame = DCPTime::from_frames (1, _film->video_frame_rate ());
127 int const audio_frames = video_frame.frames_round(_film->audio_frame_rate());
128 float* interleaved = new float[_output_audio_channels * audio_frames];
129 shared_ptr<AudioBuffers> deinterleaved (new AudioBuffers (_output_audio_channels, audio_frames));
130 for (DCPTime i; i < _film->length(); i += video_frame) {
132 if (_file_encoders.size() > 1 && !reel->contains(i)) {
133 /* Next reel and file */
136 DCPOMATIC_ASSERT (reel != reel_periods.end());
137 DCPOMATIC_ASSERT (encoder != _file_encoders.end());
140 pair<shared_ptr<PlayerVideo>, DCPTime> v = _butler->get_video ();
141 (*encoder)->video (v.first, v.second);
146 boost::mutex::scoped_lock lm (_mutex);
150 shared_ptr<Job> job = _job.lock ();
152 job->set_progress (float(i.get()) / _film->length().get());
155 _butler->get_audio (interleaved, audio_frames);
156 /* XXX: inefficient; butler interleaves and we deinterleave again */
157 float* p = interleaved;
158 for (int j = 0; j < audio_frames; ++j) {
159 for (int k = 0; k < _output_audio_channels; ++k) {
160 deinterleaved->data(k)[j] = *p++;
163 (*encoder)->audio (deinterleaved);
165 delete[] interleaved;
167 BOOST_FOREACH (shared_ptr<FFmpegFileEncoder> i, _file_encoders) {
173 FFmpegEncoder::current_rate () const
175 return _history.rate ();
179 FFmpegEncoder::frames_done () const
181 boost::mutex::scoped_lock lm (_mutex);
182 return _last_time.frames_round (_film->video_frame_rate ());