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/>.
24 #include "ffmpeg_encoder.h"
30 #include "player_video.h"
31 #include "compose.hpp"
39 using std::make_shared;
40 using std::shared_ptr;
44 using boost::optional;
45 using namespace dcpomatic;
46 #if BOOST_VERSION >= 106100
47 using namespace boost::placeholders;
51 /** @param key Key to use to encrypt MP4 outputs */
52 FFmpegEncoder::FFmpegEncoder (
53 shared_ptr<const Film> film,
55 boost::filesystem::path output,
57 bool mixdown_to_stereo,
59 bool audio_stream_per_channel,
66 , _split_reels (split_reels)
67 , _audio_stream_per_channel (audio_stream_per_channel)
68 , _x264_crf (x264_crf)
70 _player->set_always_burn_open_subtitles ();
71 _player->set_play_referenced ();
73 int const ch = film->audio_channels ();
76 if (mixdown_to_stereo) {
77 _output_audio_channels = 2;
78 map = AudioMapping (ch, 2);
79 float const overall_gain = 2 / (4 + sqrt(2));
80 float const minus_3dB = 1 / sqrt(2);
82 map.set (dcp::Channel::LEFT, 0, 1);
83 map.set (dcp::Channel::RIGHT, 1, 1);
85 map.set (dcp::Channel::LEFT, 0, overall_gain);
86 map.set (dcp::Channel::RIGHT, 1, overall_gain);
87 map.set (dcp::Channel::CENTRE, 0, overall_gain * minus_3dB);
88 map.set (dcp::Channel::CENTRE, 1, overall_gain * minus_3dB);
89 map.set (dcp::Channel::LS, 0, overall_gain);
91 map.set (dcp::Channel::LEFT, 0, overall_gain);
92 map.set (dcp::Channel::RIGHT, 1, overall_gain);
93 map.set (dcp::Channel::CENTRE, 0, overall_gain * minus_3dB);
94 map.set (dcp::Channel::CENTRE, 1, overall_gain * minus_3dB);
95 map.set (dcp::Channel::LS, 0, overall_gain);
96 map.set (dcp::Channel::RS, 1, overall_gain);
98 /* XXX: maybe we should do something better for >6 channel DCPs */
100 /* Our encoders don't really want to encode any channel count between 9 and 15 inclusive,
101 * so let's just use 16 channel exports for any project with more than 8 channels.
103 _output_audio_channels = ch > 8 ? 16 : ch;
104 map = AudioMapping (ch, _output_audio_channels);
105 for (int i = 0; i < ch; ++i) {
110 _butler = std::make_shared<Butler>(
114 _output_audio_channels,
115 bind(&PlayerVideo::force, FFmpegFileEncoder::pixel_format(format)),
117 Image::Alignment::PADDED,
120 Butler::Audio::ENABLED
129 auto job = _job.lock ();
130 DCPOMATIC_ASSERT (job);
131 job->sub (_("Encoding"));
136 list<FileEncoderSet> file_encoders;
138 int const files = _split_reels ? _film->reels().size() : 1;
139 for (int i = 0; i < files; ++i) {
141 boost::filesystem::path filename = _output;
142 string extension = boost::filesystem::extension (filename);
143 filename = boost::filesystem::change_extension (filename, "");
146 /// TRANSLATORS: _reel%1 here is to be added to an export filename to indicate
147 /// which reel it is. Preserve the %1; it will be replaced with the reel number.
148 filename = filename.string() + String::compose(_("_reel%1"), i + 1);
151 file_encoders.push_back (
154 _film->video_frame_rate(),
155 _film->audio_frame_rate(),
156 _output_audio_channels,
158 _audio_stream_per_channel,
167 auto reel_periods = _film->reels ();
168 auto reel = reel_periods.begin ();
169 auto encoder = file_encoders.begin ();
171 auto const video_frame = DCPTime::from_frames (1, _film->video_frame_rate ());
172 int const audio_frames = video_frame.frames_round(_film->audio_frame_rate());
173 std::vector<float> interleaved(_output_audio_channels * audio_frames);
174 auto deinterleaved = make_shared<AudioBuffers>(_output_audio_channels, audio_frames);
175 int const gets_per_frame = _film->three_d() ? 2 : 1;
176 for (DCPTime i; i < _film->length(); i += video_frame) {
178 if (file_encoders.size() > 1 && !reel->contains(i)) {
179 /* Next reel and file */
182 DCPOMATIC_ASSERT (reel != reel_periods.end());
183 DCPOMATIC_ASSERT (encoder != file_encoders.end());
186 for (int j = 0; j < gets_per_frame; ++j) {
188 auto v = _butler->get_video (Butler::Behaviour::BLOCKING, &e);
191 auto fe = encoder->get (v.first->eyes());
193 fe->video(v.first, v.second - reel->from);
196 if (e.code != Butler::Error::Code::FINISHED) {
197 throw DecodeError(String::compose("Error during decoding: %1", e.summary()));
205 boost::mutex::scoped_lock lm (_mutex);
209 auto job = _job.lock ();
211 job->set_progress (float(i.get()) / _film->length().get());
216 _butler->get_audio (Butler::Behaviour::BLOCKING, interleaved.data(), audio_frames);
217 /* XXX: inefficient; butler interleaves and we deinterleave again */
218 float* p = interleaved.data();
219 for (int j = 0; j < audio_frames; ++j) {
220 for (int k = 0; k < _output_audio_channels; ++k) {
221 deinterleaved->data(k)[j] = *p++;
224 encoder->audio (deinterleaved);
227 for (auto i: file_encoders) {
233 FFmpegEncoder::current_rate () const
235 return _history.rate ();
239 FFmpegEncoder::frames_done () const
241 boost::mutex::scoped_lock lm (_mutex);
242 return _last_time.frames_round (_film->video_frame_rate ());
245 FFmpegEncoder::FileEncoderSet::FileEncoderSet (
246 dcp::Size video_frame_size,
247 int video_frame_rate,
248 int audio_frame_rate,
251 bool audio_stream_per_channel,
254 boost::filesystem::path output,
259 /// TRANSLATORS: L here is an abbreviation for "left", to indicate the left-eye part of a 3D export
260 _encoders[Eyes::LEFT] = make_shared<FFmpegFileEncoder>(
261 video_frame_size, video_frame_rate, audio_frame_rate, channels, format,
262 audio_stream_per_channel, x264_crf, String::compose("%1_%2%3", output.string(), _("L"), extension)
264 /// TRANSLATORS: R here is an abbreviation for "right", to indicate the right-eye part of a 3D export
265 _encoders[Eyes::RIGHT] = make_shared<FFmpegFileEncoder>(
266 video_frame_size, video_frame_rate, audio_frame_rate, channels, format,
267 audio_stream_per_channel, x264_crf, String::compose("%1_%2%3", output.string(), _("R"), extension)
270 _encoders[Eyes::BOTH] = make_shared<FFmpegFileEncoder>(
271 video_frame_size, video_frame_rate, audio_frame_rate, channels, format,
272 audio_stream_per_channel, x264_crf, String::compose("%1%2", output.string(), extension)
277 shared_ptr<FFmpegFileEncoder>
278 FFmpegEncoder::FileEncoderSet::get (Eyes eyes) const
280 if (_encoders.size() == 1) {
281 /* We are doing a 2D export... */
282 if (eyes == Eyes::LEFT) {
283 /* ...but we got some 3D data; put the left eye into the output... */
285 } else if (eyes == Eyes::RIGHT) {
286 /* ...and ignore the right eye.*/
291 auto i = _encoders.find (eyes);
292 DCPOMATIC_ASSERT (i != _encoders.end());
297 FFmpegEncoder::FileEncoderSet::flush ()
299 for (auto& i: _encoders) {
305 FFmpegEncoder::FileEncoderSet::audio (shared_ptr<AudioBuffers> a)
307 for (auto& i: _encoders) {