Oops: commit piece.cc.

diff --git a/src/lib/piece.cc b/src/lib/piece.cc
new file mode 100644 (file)
index 0000000..a34b399
--- /dev/null
+++ b/src/lib/piece.cc
@@ -0,0 +1,169 @@
+/*
+    Copyright (C) 2013-2020 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 "audio_stream.h"
+#include "content.h"
+#include "piece.h"
+#include <boost/foreach.hpp>
+
+
+using std::copy;
+using std::list;
+using boost::shared_ptr;
+
+
+Piece::Piece (shared_ptr<Content> c, shared_ptr<Decoder> d, FrameRateChange f)
+       : _frc (f)
+       , _done (false)
+{
+       _content.push_back (c);
+       _decoder.push_back (d);
+
+       if (c->audio) {
+               BOOST_FOREACH (AudioStreamPtr i, c->audio->streams()) {
+                       _stream_last_push_end[i] = c->position();
+               }
+       }
+}
+
+
+void
+Piece::update_pull_to (DCPTime& pull_to) const
+{
+       if (_done) {
+               return;
+       }
+
+       for (map<AudioStreamPtr, DCPTime>::const_iterator i = _stream_last_push_end.begin(); i != _stream_last_push_end.end(); ++i) {
+               if (i->second < pull_to) {
+                       pull_to = i->second;
+               }
+       }
+}
+
+
+void
+Piece::set_last_push_end (AudioStreamPtr stream, DCPTime end)
+{
+       DCPOMATIC_ASSERT (_stream_last_push_end.find(stream) != _stream_last_push_end.end());
+       _stream_last_push_end[stream] = end;
+}
+
+
+DCPTime
+Piece::position () const
+{
+       return _content[0]->position();
+}
+
+
+DCPTime
+Piece::end (shared_ptr<const Film> film) const
+{
+       return _content[0]->end(film);
+}
+
+
+DCPTime
+Piece::content_video_to_dcp (Frame f) const
+{
+       /* It might seem more logical here to convert s to a ContentTime (using the FrameRateChange)
+          then convert that ContentTime to frames at the content's rate.  However this fails for
+          situations like content at 29.9978733fps, DCP at 30fps.  The accuracy of the Time type is not
+          enough to distinguish between the two with low values of time (e.g. 3200 in Time units).
+
+          Instead we convert the DCPTime using the DCP video rate then account for any skip/repeat.
+       */
+
+       DCPTime const d = DCPTime::from_frames(f * _frc.factor(), _frc.dcp) - DCPTime(_content[0]->trim_start(), _frc);
+       return d + position();
+}
+
+
+DCPTime
+Piece::resampled_audio_to_dcp (shared_ptr<const Film> film, Frame f) const
+{
+       /* See comment in dcp_to_content_video */
+       return DCPTime::from_frames(f, film->audio_frame_rate()) - DCPTime(_content[0]->trim_start(), frc) + position();
+}
+
+
+ContentTime
+Piece::dcp_to_content_time (shared_ptr<const Film> film, DCPTime t) const
+{
+       DCPTime s = t - position();
+       s = min (_content[0]->length_after_trim(_film), s);
+       return max (ContentTime(), ContentTime(s, _frc) + _content[0]->trim_start());
+}
+
+
+DCPTime
+Piece::content_time_to_dcp (ContentTime t) const
+{
+       return max (DCPTime(), DCPTime(t - _content[0]->trim_start(), _frc) + position());
+}
+
+
+void
+Piece::add_fonts (list<shared_ptr<Font> >& fonts) const
+{
+       BOOST_FOREACH (shared_ptr<Content> i, _content) {
+               BOOST_FOREACH (shared_ptr<TextContent> j, i->text) {
+                       /* XXX: things may go wrong if there are duplicate font IDs
+                          with different font files.
+                          */
+                       list<shared_ptr<Font> > f = j->fonts ();
+                       copy (f.begin(), f.end(), back_inserter(fonts));
+               }
+       }
+}
+
+
+optional<DCPTime>
+Piece::position (shared_ptr<const Film> film)
+{
+       if (_done) {
+               return optional<DCPTime>();
+       }
+
+       DCPTime const t = content_time_to_dcp (max(_decoder[0]->position(), _content[0]->trim_start()));
+       if (t > end(film)) {
+               _done = true;
+               return optional<DCPTime>();
+       }
+
+       return t;
+}
+
+
+bool
+Piece::has_text () const
+{
+       return !_decoder[0].text.empty();
+}
+
+
+void
+Piece::pass () const
+{
+       _done = _decoder[0]->pass();
+}
+