Make Atmos content work more like other content. Now its MXFsencrypt-atmos

are re-written, meaning that they can be encrypted.

This commit is mostly just for the backend.  We also need a fair
few checks/restrictions in the UI:

- any present atmos content dictates the project frame rate
- no mixed edit rates of atmos content
- probably some other things I haven't thought of

1 files changed, 54 insertions, 0 deletions

diff --git a/src/lib/atmos_decoder.cc b/src/lib/atmos_decoder.cc
new file mode 100644
index 000000000..4ebb07f8a
--- /dev/null
+++ b/src/lib/atmos_decoder.cc
@@ -0,0 +1,54 @@
+/*
+    Copyright (C) 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 "atmos_decoder.h"
+#include "content.h"
+#include "dcpomatic_assert.h"
+#include "dcpomatic_time.h"
+#include "decoder.h"
+#include "film.h"
+
+
+using boost::shared_ptr;
+
+
+AtmosDecoder::AtmosDecoder (Decoder* parent, shared_ptr<const Content> content)
+	: DecoderPart (parent)
+	, _content (content)
+{
+
+}
+
+
+void
+AtmosDecoder::seek ()
+{
+	_position = boost::none;
+}
+
+
+void
+AtmosDecoder::emit (shared_ptr<const Film> film, shared_ptr<const dcp::AtmosFrame> data, Frame frame, AtmosMetadata metadata)
+{
+	Data (ContentAtmos(data, frame, metadata));
+	/* There's no fiddling with frame rates when we are using Atmos; the DCP rate must be the same as the Atmos one */
+	_position = dcpomatic::ContentTime::from_frames (frame, film->video_frame_rate());
+}