Support MPEG2 decompression.

1 files changed, 77 insertions, 0 deletions

diff --git a/src/mono_mpeg2_picture_asset.cc b/src/mono_mpeg2_picture_asset.cc
new file mode 100644
index 00000000..548e936a
--- /dev/null
+++ b/src/mono_mpeg2_picture_asset.cc
@@ -0,0 +1,77 @@
+/*
+    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 "filesystem.h"
+#include "mono_mpeg2_picture_asset.h"
+#include "mono_mpeg2_picture_asset_reader.h"
+#include <asdcp/AS_DCP.h>
+
+
+using std::shared_ptr;
+using namespace dcp;
+
+
+MonoMPEG2PictureAsset::MonoMPEG2PictureAsset(boost::filesystem::path file)
+	: MPEG2PictureAsset(file)
+{
+	Kumu::FileReaderFactory factory;
+	ASDCP::MPEG2::MXFReader reader(factory);
+	auto const result = reader.OpenRead(dcp::filesystem::fix_long_path(file).string().c_str());
+	if (ASDCP_FAILURE(result)) {
+		boost::throw_exception(MXFFileError("could not open MXF file for reading", file.string(), result));
+	}
+
+	ASDCP::MPEG2::VideoDescriptor desc;
+	if (ASDCP_FAILURE(reader.FillVideoDescriptor(desc))) {
+		boost::throw_exception(ReadError("could not read video MXF information"));
+	}
+
+	read_video_descriptor(desc);
+
+	ASDCP::WriterInfo info;
+	if (ASDCP_FAILURE(reader.FillWriterInfo(info))) {
+		boost::throw_exception(ReadError("could not read video MXF information"));
+	}
+
+	_id = read_writer_info(info);
+}
+
+
+shared_ptr<MonoMPEG2PictureAssetReader>
+MonoMPEG2PictureAsset::start_read () const
+{
+	/* Can't use make_shared here as the MonoMPEG2PictureAssetReader constructor is private */
+	return shared_ptr<MonoMPEG2PictureAssetReader>(new MonoMPEG2PictureAssetReader(this, key(), standard()));
+
+}