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;
41 using boost::shared_ptr;
43 using boost::weak_ptr;
44 using boost::optional;
45 using namespace dcpomatic;
46 #if BOOST_VERSION >= 106100
47 using namespace boost::placeholders;
50 /** @param key Key to use to encrypt MP4 outputs */
51 FFmpegEncoder::FFmpegEncoder (
52 shared_ptr<const Film> film,
54 boost::filesystem::path output,
56 bool mixdown_to_stereo,
58 bool audio_stream_per_channel,
65 , _split_reels (split_reels)
66 , _audio_stream_per_channel (audio_stream_per_channel)
67 , _x264_crf (x264_crf)
69 _player->set_always_burn_open_subtitles ();
70 _player->set_play_referenced ();
72 int const ch = film->audio_channels ();
75 if (mixdown_to_stereo) {
76 _output_audio_channels = 2;
77 map = AudioMapping (ch, 2);
78 float const overall_gain = 2 / (4 + sqrt(2));
79 float const minus_3dB = 1 / sqrt(2);
81 map.set (dcp::LEFT, 0, 1);
82 map.set (dcp::RIGHT, 1, 1);
84 map.set (dcp::LEFT, 0, overall_gain);
85 map.set (dcp::RIGHT, 1, overall_gain);
86 map.set (dcp::CENTRE, 0, overall_gain * minus_3dB);
87 map.set (dcp::CENTRE, 1, overall_gain * minus_3dB);
88 map.set (dcp::LS, 0, overall_gain);
90 map.set (dcp::LEFT, 0, overall_gain);
91 map.set (dcp::RIGHT, 1, overall_gain);
92 map.set (dcp::CENTRE, 0, overall_gain * minus_3dB);
93 map.set (dcp::CENTRE, 1, overall_gain * minus_3dB);
94 map.set (dcp::LS, 0, overall_gain);
95 map.set (dcp::RS, 1, overall_gain);
97 /* XXX: maybe we should do something better for >6 channel DCPs */
99 /* Our encoders don't really want to encode any channel count between 9 and 15 inclusive,
100 * so let's just use 16 channel exports for any project with more than 8 channels.
102 _output_audio_channels = ch > 8 ? 16 : ch;
103 map = AudioMapping (ch, _output_audio_channels);
104 for (int i = 0; i < ch; ++i) {
110 new Butler(_film, _player, map, _output_audio_channels, bind(&PlayerVideo::force, _1, FFmpegFileEncoder::pixel_format(format)), VIDEO_RANGE_VIDEO, true, false)
119 shared_ptr<Job> job = _job.lock ();
120 DCPOMATIC_ASSERT (job);
121 job->sub (_("Encoding"));
126 list<FileEncoderSet> file_encoders;
128 int const files = _split_reels ? _film->reels().size() : 1;
129 for (int i = 0; i < files; ++i) {
131 boost::filesystem::path filename = _output;
132 string extension = boost::filesystem::extension (filename);
133 filename = boost::filesystem::change_extension (filename, "");
136 /// TRANSLATORS: _reel%1 here is to be added to an export filename to indicate
137 /// which reel it is. Preserve the %1; it will be replaced with the reel number.
138 filename = filename.string() + String::compose(_("_reel%1"), i + 1);
141 file_encoders.push_back (
144 _film->video_frame_rate(),
145 _film->audio_frame_rate(),
146 _output_audio_channels,
148 _audio_stream_per_channel,
157 list<DCPTimePeriod> reel_periods = _film->reels ();
158 list<DCPTimePeriod>::const_iterator reel = reel_periods.begin ();
159 list<FileEncoderSet>::iterator encoder = file_encoders.begin ();
161 DCPTime const video_frame = DCPTime::from_frames (1, _film->video_frame_rate ());
162 int const audio_frames = video_frame.frames_round(_film->audio_frame_rate());
163 float* interleaved = new float[_output_audio_channels * audio_frames];
164 shared_ptr<AudioBuffers> deinterleaved (new AudioBuffers (_output_audio_channels, audio_frames));
165 int const gets_per_frame = _film->three_d() ? 2 : 1;
166 for (DCPTime i; i < _film->length(); i += video_frame) {
168 if (file_encoders.size() > 1 && !reel->contains(i)) {
169 /* Next reel and file */
172 DCPOMATIC_ASSERT (reel != reel_periods.end());
173 DCPOMATIC_ASSERT (encoder != file_encoders.end());
176 for (int j = 0; j < gets_per_frame; ++j) {
178 pair<shared_ptr<PlayerVideo>, DCPTime> v = _butler->get_video (true, &e);
181 throw DecodeError(String::compose("Error during decoding: %1", e.summary()));
183 shared_ptr<FFmpegFileEncoder> fe = encoder->get (v.first->eyes());
185 fe->video(v.first, v.second);
192 boost::mutex::scoped_lock lm (_mutex);
196 shared_ptr<Job> job = _job.lock ();
198 job->set_progress (float(i.get()) / _film->length().get());
203 _butler->get_audio (interleaved, audio_frames);
204 /* XXX: inefficient; butler interleaves and we deinterleave again */
205 float* p = interleaved;
206 for (int j = 0; j < audio_frames; ++j) {
207 for (int k = 0; k < _output_audio_channels; ++k) {
208 deinterleaved->data(k)[j] = *p++;
211 encoder->audio (deinterleaved);
213 delete[] interleaved;
215 BOOST_FOREACH (FileEncoderSet i, file_encoders) {
221 FFmpegEncoder::current_rate () const
223 return _history.rate ();
227 FFmpegEncoder::frames_done () const
229 boost::mutex::scoped_lock lm (_mutex);
230 return _last_time.frames_round (_film->video_frame_rate ());
233 FFmpegEncoder::FileEncoderSet::FileEncoderSet (
234 dcp::Size video_frame_size,
235 int video_frame_rate,
236 int audio_frame_rate,
239 bool audio_stream_per_channel,
242 boost::filesystem::path output,
247 /// TRANSLATORS: L here is an abbreviation for "left", to indicate the left-eye part of a 3D export
248 _encoders[EYES_LEFT] = shared_ptr<FFmpegFileEncoder>(
249 new FFmpegFileEncoder(
250 video_frame_size, video_frame_rate, audio_frame_rate, channels, format,
251 audio_stream_per_channel, x264_crf, String::compose("%1_%2%3", output.string(), _("L"), extension))
253 /// TRANSLATORS: R here is an abbreviation for "right", to indicate the right-eye part of a 3D export
254 _encoders[EYES_RIGHT] = shared_ptr<FFmpegFileEncoder>(
255 new FFmpegFileEncoder(
256 video_frame_size, video_frame_rate, audio_frame_rate, channels, format,
257 audio_stream_per_channel, x264_crf, String::compose("%1_%2%3", output.string(), _("R"), extension))
260 _encoders[EYES_BOTH] = shared_ptr<FFmpegFileEncoder>(
261 new FFmpegFileEncoder(
262 video_frame_size, video_frame_rate, audio_frame_rate, channels, format,
263 audio_stream_per_channel, x264_crf, String::compose("%1%2", output.string(), extension))
268 shared_ptr<FFmpegFileEncoder>
269 FFmpegEncoder::FileEncoderSet::get (Eyes eyes) const
271 if (_encoders.size() == 1) {
272 /* We are doing a 2D export... */
273 if (eyes == EYES_LEFT) {
274 /* ...but we got some 3D data; put the left eye into the output... */
276 } else if (eyes == EYES_RIGHT) {
277 /* ...and ignore the right eye.*/
278 return shared_ptr<FFmpegFileEncoder>();
282 map<Eyes, boost::shared_ptr<FFmpegFileEncoder> >::const_iterator i = _encoders.find (eyes);
283 DCPOMATIC_ASSERT (i != _encoders.end());
288 FFmpegEncoder::FileEncoderSet::flush ()
290 for (map<Eyes, boost::shared_ptr<FFmpegFileEncoder> >::iterator i = _encoders.begin(); i != _encoders.end(); ++i) {
296 FFmpegEncoder::FileEncoderSet::audio (shared_ptr<AudioBuffers> a)
298 for (map<Eyes, boost::shared_ptr<FFmpegFileEncoder> >::iterator i = _encoders.begin(); i != _encoders.end(); ++i) {
299 i->second->audio (a);