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;
39 using boost::shared_ptr;
41 using boost::weak_ptr;
44 FFmpegEncoder::FFmpegEncoder (shared_ptr<const Film> film, weak_ptr<Job> job, boost::filesystem::path output, ExportFormat format, bool mixdown_to_stereo, int x264_crf)
48 _film->video_frame_rate(),
49 _film->audio_frame_rate(),
50 mixdown_to_stereo ? 2 : film->audio_channels(),
58 _player->set_always_burn_open_subtitles ();
59 _player->set_play_referenced ();
61 int const ch = film->audio_channels ();
64 if (mixdown_to_stereo) {
65 _output_audio_channels = 2;
66 map = AudioMapping (ch, 2);
67 float const overall_gain = 2 / (4 + sqrt(2));
68 float const minus_3dB = 1 / sqrt(2);
69 map.set (dcp::LEFT, 0, overall_gain);
70 map.set (dcp::RIGHT, 1, overall_gain);
71 map.set (dcp::CENTRE, 0, overall_gain * minus_3dB);
72 map.set (dcp::CENTRE, 1, overall_gain * minus_3dB);
73 map.set (dcp::LS, 0, overall_gain);
74 map.set (dcp::RS, 1, overall_gain);
76 _output_audio_channels = ch;
77 map = AudioMapping (ch, ch);
78 for (int i = 0; i < ch; ++i) {
83 _butler.reset (new Butler (_player, film->log(), map, _output_audio_channels));
90 shared_ptr<Job> job = _job.lock ();
91 DCPOMATIC_ASSERT (job);
92 job->sub (_("Encoding"));
95 DCPTime const video_frame = DCPTime::from_frames (1, _film->video_frame_rate ());
96 int const audio_frames = video_frame.frames_round(_film->audio_frame_rate());
97 float* interleaved = new float[_output_audio_channels * audio_frames];
98 shared_ptr<AudioBuffers> deinterleaved (new AudioBuffers (_output_audio_channels, audio_frames));
99 for (DCPTime i; i < _film->length(); i += video_frame) {
100 pair<shared_ptr<PlayerVideo>, DCPTime> v = _butler->get_video ();
101 _file_encoder.video (v.first, v.second);
106 boost::mutex::scoped_lock lm (_mutex);
110 shared_ptr<Job> job = _job.lock ();
112 job->set_progress (float(i.get()) / _film->length().get());
115 _butler->get_audio (interleaved, audio_frames);
116 /* XXX: inefficient; butler interleaves and we deinterleave again */
117 float* p = interleaved;
118 for (int j = 0; j < audio_frames; ++j) {
119 for (int k = 0; k < _output_audio_channels; ++k) {
120 deinterleaved->data(k)[j] = *p++;
123 _file_encoder.audio (deinterleaved);
125 delete[] interleaved;
127 _file_encoder.flush ();
131 FFmpegEncoder::current_rate () const
133 return _history.rate ();
137 FFmpegEncoder::frames_done () const
139 boost::mutex::scoped_lock lm (_mutex);
140 return _last_time.frames_round (_film->video_frame_rate ());