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;
47 /** @param key Key to use to encrypt MP4 outputs */
48 FFmpegEncoder::FFmpegEncoder (
49 shared_ptr<const Film> film,
51 boost::filesystem::path output,
53 bool mixdown_to_stereo,
55 bool audio_stream_per_channel,
57 #ifdef DCPOMATIC_VARIANT_SWAROOP
58 , optional<dcp::Key> key
65 _player->set_always_burn_open_subtitles ();
66 _player->set_play_referenced ();
68 int const ch = film->audio_channels ();
71 if (mixdown_to_stereo) {
72 _output_audio_channels = 2;
73 map = AudioMapping (ch, 2);
74 float const overall_gain = 2 / (4 + sqrt(2));
75 float const minus_3dB = 1 / sqrt(2);
77 map.set (dcp::LEFT, 0, 1);
78 map.set (dcp::RIGHT, 1, 1);
80 map.set (dcp::LEFT, 0, overall_gain);
81 map.set (dcp::RIGHT, 1, overall_gain);
82 map.set (dcp::CENTRE, 0, overall_gain * minus_3dB);
83 map.set (dcp::CENTRE, 1, overall_gain * minus_3dB);
84 map.set (dcp::LS, 0, overall_gain);
86 map.set (dcp::LEFT, 0, overall_gain);
87 map.set (dcp::RIGHT, 1, overall_gain);
88 map.set (dcp::CENTRE, 0, overall_gain * minus_3dB);
89 map.set (dcp::CENTRE, 1, overall_gain * minus_3dB);
90 map.set (dcp::LS, 0, overall_gain);
91 map.set (dcp::RS, 1, overall_gain);
93 /* XXX: maybe we should do something better for >6 channel DCPs */
95 /* Our encoders don't really want to encode any channel count between 9 and 15 inclusive,
96 * so let's just use 16 channel exports for any project with more than 8 channels.
98 _output_audio_channels = ch > 8 ? 16 : ch;
99 map = AudioMapping (ch, _output_audio_channels);
100 for (int i = 0; i < ch; ++i) {
105 _butler.reset (new Butler(_player, map, _output_audio_channels, bind(&PlayerVideo::force, _1, FFmpegFileEncoder::pixel_format(format)), true, false));
107 int const files = split_reels ? film->reels().size() : 1;
108 for (int i = 0; i < files; ++i) {
110 boost::filesystem::path filename = output;
111 string extension = boost::filesystem::extension (filename);
112 filename = boost::filesystem::change_extension (filename, "");
115 /// TRANSLATORS: _reel%1 here is to be added to an export filename to indicate
116 /// which reel it is. Preserve the %1; it will be replaced with the reel number.
117 filename = filename.string() + String::compose(_("_reel%1"), i + 1);
120 _file_encoders.push_back (
123 _film->video_frame_rate(),
124 _film->audio_frame_rate(),
125 _output_audio_channels,
127 audio_stream_per_channel,
132 #ifdef DCPOMATIC_VARIANT_SWAROOP
146 shared_ptr<Job> job = _job.lock ();
147 DCPOMATIC_ASSERT (job);
148 job->sub (_("Encoding"));
153 list<DCPTimePeriod> reel_periods = _film->reels ();
154 list<DCPTimePeriod>::const_iterator reel = reel_periods.begin ();
155 list<FileEncoderSet>::iterator encoder = _file_encoders.begin ();
157 DCPTime const video_frame = DCPTime::from_frames (1, _film->video_frame_rate ());
158 int const audio_frames = video_frame.frames_round(_film->audio_frame_rate());
159 float* interleaved = new float[_output_audio_channels * audio_frames];
160 shared_ptr<AudioBuffers> deinterleaved (new AudioBuffers (_output_audio_channels, audio_frames));
161 int const gets_per_frame = _film->three_d() ? 2 : 1;
162 for (DCPTime i; i < _film->length(); i += video_frame) {
164 if (_file_encoders.size() > 1 && !reel->contains(i)) {
165 /* Next reel and file */
168 DCPOMATIC_ASSERT (reel != reel_periods.end());
169 DCPOMATIC_ASSERT (encoder != _file_encoders.end());
172 for (int j = 0; j < gets_per_frame; ++j) {
174 pair<shared_ptr<PlayerVideo>, DCPTime> v = _butler->get_video (true, &e);
177 throw ProgrammingError(__FILE__, __LINE__, String::compose("butler returned no video; error was %1", e.summary()));
179 shared_ptr<FFmpegFileEncoder> fe = encoder->get (v.first->eyes());
181 fe->video(v.first, v.second);
188 boost::mutex::scoped_lock lm (_mutex);
192 shared_ptr<Job> job = _job.lock ();
194 job->set_progress (float(i.get()) / _film->length().get());
199 _butler->get_audio (interleaved, audio_frames);
200 /* XXX: inefficient; butler interleaves and we deinterleave again */
201 float* p = interleaved;
202 for (int j = 0; j < audio_frames; ++j) {
203 for (int k = 0; k < _output_audio_channels; ++k) {
204 deinterleaved->data(k)[j] = *p++;
207 encoder->audio (deinterleaved);
209 delete[] interleaved;
211 BOOST_FOREACH (FileEncoderSet i, _file_encoders) {
217 FFmpegEncoder::current_rate () const
219 return _history.rate ();
223 FFmpegEncoder::frames_done () const
225 boost::mutex::scoped_lock lm (_mutex);
226 return _last_time.frames_round (_film->video_frame_rate ());
229 FFmpegEncoder::FileEncoderSet::FileEncoderSet (
230 dcp::Size video_frame_size,
231 int video_frame_rate,
232 int audio_frame_rate,
235 bool audio_stream_per_channel,
238 boost::filesystem::path output,
240 #ifdef DCPOMATIC_VARIANT_SWAROOP
241 , optional<dcp::Key> key
242 , optional<string> id
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)
252 #ifdef DCPOMATIC_VARIANT_SWAROOP
257 /// TRANSLATORS: R here is an abbreviation for "right", to indicate the right-eye part of a 3D export
258 _encoders[EYES_RIGHT] = shared_ptr<FFmpegFileEncoder>(
259 new FFmpegFileEncoder(
260 video_frame_size, video_frame_rate, audio_frame_rate, channels, format,
261 audio_stream_per_channel, x264_crf, String::compose("%1_%2%3", output.string(), _("R"), extension)
262 #ifdef DCPOMATIC_VARIANT_SWAROOP
268 _encoders[EYES_BOTH] = shared_ptr<FFmpegFileEncoder>(
269 new FFmpegFileEncoder(
270 video_frame_size, video_frame_rate, audio_frame_rate, channels, format,
271 audio_stream_per_channel, x264_crf, String::compose("%1%2", output.string(), extension)
272 #ifdef DCPOMATIC_VARIANT_SWAROOP
280 shared_ptr<FFmpegFileEncoder>
281 FFmpegEncoder::FileEncoderSet::get (Eyes eyes) const
283 if (_encoders.size() == 1) {
284 /* We are doing a 2D export... */
285 if (eyes == EYES_LEFT) {
286 /* ...but we got some 3D data; put the left eye into the output... */
288 } else if (eyes == EYES_RIGHT) {
289 /* ...and ignore the right eye.*/
290 return shared_ptr<FFmpegFileEncoder>();
294 map<Eyes, boost::shared_ptr<FFmpegFileEncoder> >::const_iterator i = _encoders.find (eyes);
295 DCPOMATIC_ASSERT (i != _encoders.end());
300 FFmpegEncoder::FileEncoderSet::flush ()
302 for (map<Eyes, boost::shared_ptr<FFmpegFileEncoder> >::iterator i = _encoders.begin(); i != _encoders.end(); ++i) {
308 FFmpegEncoder::FileEncoderSet::audio (shared_ptr<AudioBuffers> a)
310 for (map<Eyes, boost::shared_ptr<FFmpegFileEncoder> >::iterator i = _encoders.begin(); i != _encoders.end(); ++i) {
311 i->second->audio (a);