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/*
Copyright (C) 2017-2018 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ffmpeg_encoder.h"
#include "film.h"
#include "job.h"
#include "player.h"
#include "player_video.h"
#include "log.h"
#include "image.h"
#include "cross.h"
#include "butler.h"
#include "compose.hpp"
#include <iostream>
#include "i18n.h"
using std::string;
using std::runtime_error;
using std::cout;
using std::pair;
using std::list;
using std::map;
using boost::shared_ptr;
using boost::bind;
using boost::weak_ptr;
FFmpegEncoder::FFmpegEncoder (
shared_ptr<const Film> film,
weak_ptr<Job> job,
boost::filesystem::path output,
ExportFormat format,
bool mixdown_to_stereo,
bool split_reels,
int x264_crf
)
: Encoder (film, job)
, _history (1000)
{
int const files = split_reels ? film->reels().size() : 1;
for (int i = 0; i < files; ++i) {
boost::filesystem::path filename = output;
string extension = boost::filesystem::extension (filename);
filename = boost::filesystem::change_extension (filename, "");
if (files > 1) {
/// TRANSLATORS: _reel%1 here is to be added to an export filename to indicate
/// which reel it is. Preserve the %1; it will be replaced with the reel number.
filename = filename.string() + String::compose(_("_reel%1"), i + 1);
}
_file_encoders.push_back (
FileEncoderSet (
_film->frame_size(),
_film->video_frame_rate(),
_film->audio_frame_rate(),
mixdown_to_stereo ? 2 : film->audio_channels(),
format,
x264_crf,
_film->three_d(),
filename,
extension
)
);
}
_player->set_always_burn_open_subtitles ();
_player->set_play_referenced ();
int const ch = film->audio_channels ();
AudioMapping map;
if (mixdown_to_stereo) {
_output_audio_channels = 2;
map = AudioMapping (ch, 2);
float const overall_gain = 2 / (4 + sqrt(2));
float const minus_3dB = 1 / sqrt(2);
map.set (dcp::LEFT, 0, overall_gain);
map.set (dcp::RIGHT, 1, overall_gain);
map.set (dcp::CENTRE, 0, overall_gain * minus_3dB);
map.set (dcp::CENTRE, 1, overall_gain * minus_3dB);
map.set (dcp::LS, 0, overall_gain);
map.set (dcp::RS, 1, overall_gain);
} else {
_output_audio_channels = ch;
map = AudioMapping (ch, ch);
for (int i = 0; i < ch; ++i) {
map.set (i, i, 1);
}
}
_butler.reset (new Butler(_player, map, _output_audio_channels, bind(&PlayerVideo::force, _1, FFmpegFileEncoder::pixel_format(format)), true, false));
}
void
FFmpegEncoder::go ()
{
{
shared_ptr<Job> job = _job.lock ();
DCPOMATIC_ASSERT (job);
job->sub (_("Encoding"));
}
list<DCPTimePeriod> reel_periods = _film->reels ();
list<DCPTimePeriod>::const_iterator reel = reel_periods.begin ();
list<FileEncoderSet>::iterator encoder = _file_encoders.begin ();
DCPTime const video_frame = DCPTime::from_frames (1, _film->video_frame_rate ());
int const audio_frames = video_frame.frames_round(_film->audio_frame_rate());
float* interleaved = new float[_output_audio_channels * audio_frames];
shared_ptr<AudioBuffers> deinterleaved (new AudioBuffers (_output_audio_channels, audio_frames));
int const gets_per_frame = _film->three_d() ? 2 : 1;
for (DCPTime i; i < _film->length(); i += video_frame) {
if (_file_encoders.size() > 1 && !reel->contains(i)) {
/* Next reel and file */
++reel;
++encoder;
DCPOMATIC_ASSERT (reel != reel_periods.end());
DCPOMATIC_ASSERT (encoder != _file_encoders.end());
}
for (int j = 0; j < gets_per_frame; ++j) {
pair<shared_ptr<PlayerVideo>, DCPTime> v = _butler->get_video ();
encoder->get(v.first->eyes())->video(v.first, v.second);
}
_history.event ();
{
boost::mutex::scoped_lock lm (_mutex);
_last_time = i;
}
shared_ptr<Job> job = _job.lock ();
if (job) {
job->set_progress (float(i.get()) / _film->length().get());
}
_butler->get_audio (interleaved, audio_frames);
/* XXX: inefficient; butler interleaves and we deinterleave again */
float* p = interleaved;
for (int j = 0; j < audio_frames; ++j) {
for (int k = 0; k < _output_audio_channels; ++k) {
deinterleaved->data(k)[j] = *p++;
}
}
encoder->audio (deinterleaved);
}
delete[] interleaved;
BOOST_FOREACH (FileEncoderSet i, _file_encoders) {
i.flush ();
}
}
float
FFmpegEncoder::current_rate () const
{
return _history.rate ();
}
Frame
FFmpegEncoder::frames_done () const
{
boost::mutex::scoped_lock lm (_mutex);
return _last_time.frames_round (_film->video_frame_rate ());
}
FFmpegEncoder::FileEncoderSet::FileEncoderSet (
dcp::Size video_frame_size,
int video_frame_rate,
int audio_frame_rate,
int channels,
ExportFormat format,
int x264_crf,
bool three_d,
boost::filesystem::path output,
string extension
)
{
if (three_d) {
/// TRANSLATORS: L here is an abbreviation for "left", to indicate the left-eye part of a 3D export
_encoders[EYES_LEFT] = shared_ptr<FFmpegFileEncoder>(
new FFmpegFileEncoder(video_frame_size, video_frame_rate, audio_frame_rate, channels, format, x264_crf, String::compose("%1_%2%3", output.string(), _("L"), extension))
);
/// TRANSLATORS: R here is an abbreviation for "left", to indicate the left-eye part of a 3D export
_encoders[EYES_RIGHT] = shared_ptr<FFmpegFileEncoder>(
new FFmpegFileEncoder(video_frame_size, video_frame_rate, audio_frame_rate, channels, format, x264_crf, String::compose("%1_%2%3", output.string(), _("R"), extension))
);
} else {
_encoders[EYES_BOTH] = shared_ptr<FFmpegFileEncoder>(
new FFmpegFileEncoder(video_frame_size, video_frame_rate, audio_frame_rate, channels, format, x264_crf, String::compose("%1%2", output.string(), extension))
);
}
}
shared_ptr<FFmpegFileEncoder>
FFmpegEncoder::FileEncoderSet::get (Eyes eyes) const
{
map<Eyes, boost::shared_ptr<FFmpegFileEncoder> >::const_iterator i = _encoders.find (eyes);
DCPOMATIC_ASSERT (i != _encoders.end());
return i->second;
}
void
FFmpegEncoder::FileEncoderSet::flush ()
{
for (map<Eyes, boost::shared_ptr<FFmpegFileEncoder> >::iterator i = _encoders.begin(); i != _encoders.end(); ++i) {
i->second->flush ();
}
}
void
FFmpegEncoder::FileEncoderSet::audio (shared_ptr<AudioBuffers> a)
{
for (map<Eyes, boost::shared_ptr<FFmpegFileEncoder> >::iterator i = _encoders.begin(); i != _encoders.end(); ++i) {
i->second->audio (a);
}
}
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