Support MPEG2 decompression.

1 files changed, 74 insertions, 0 deletions

diff --git a/src/mpeg2_picture_asset.cc b/src/mpeg2_picture_asset.cc
new file mode 100644
index 00000000..6cd0b428
--- /dev/null
+++ b/src/mpeg2_picture_asset.cc
@@ -0,0 +1,74 @@
+/*
+    Copyright (C) 2023 Carl Hetherington <cth@carlh.net>
+
+    This file is part of libdcp.
+
+    libdcp 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.
+
+    libdcp 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 libdcp.  If not, see <http://www.gnu.org/licenses/>.
+
+    In addition, as a special exception, the copyright holders give
+    permission to link the code of portions of this program with the
+    OpenSSL library under certain conditions as described in each
+    individual source file, and distribute linked combinations
+    including the two.
+
+    You must obey the GNU General Public License in all respects
+    for all of the code used other than OpenSSL.  If you modify
+    file(s) with this exception, you may extend this exception to your
+    version of the file(s), but you are not obligated to do so.  If you
+    do not wish to do so, delete this exception statement from your
+    version.  If you delete this exception statement from all source
+    files in the program, then also delete it here.
+*/
+
+
+#include "mpeg2_picture_asset.h"
+
+
+using std::string;
+using namespace dcp;
+
+
+MPEG2PictureAsset::MPEG2PictureAsset(boost::filesystem::path file)
+	: PictureAsset(file)
+{
+
+}
+
+
+void
+MPEG2PictureAsset::read_video_descriptor(ASDCP::MPEG2::VideoDescriptor const& descriptor)
+{
+	_size.width = descriptor.StoredWidth;
+	_size.height = descriptor.StoredHeight;
+	_edit_rate = Fraction(descriptor.EditRate.Numerator, descriptor.EditRate.Denominator);
+	_intrinsic_duration = descriptor.ContainerDuration;
+	_frame_rate = Fraction(descriptor.SampleRate.Numerator, descriptor.SampleRate.Denominator);
+	_screen_aspect_ratio = Fraction(descriptor.AspectRatio.Numerator, descriptor.AspectRatio.Denominator);
+}
+
+
+string
+MPEG2PictureAsset::pkl_type (Standard standard) const
+{
+	DCP_ASSERT(standard == Standard::INTEROP);
+	return "application/x-smpte-mxf;asdcpKind=Picture";
+}
+
+
+string
+MPEG2PictureAsset::static_pkl_type(Standard standard)
+{
+	DCP_ASSERT(standard == Standard::INTEROP);
+	return "application/x-smpte-mxf;asdcpKind=Picture";
+}