Use a template as a basis for Frames.

1 files changed, 75 insertions, 0 deletions

diff --git a/src/frame.h b/src/frame.h
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+/*
+    Copyright (C) 2016 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 "decryption_context.h"
+#include "exceptions.h"
+#include <asdcp/KM_fileio.h>
+#include <asdcp/AS_DCP.h>
+#include <boost/noncopyable.hpp>
+
+namespace dcp {
+
+template <class R, class B>
+class Frame : public boost::noncopyable
+{
+public:
+	Frame (R* reader, int n, boost::shared_ptr<const DecryptionContext> c)
+	{
+		/* XXX: unfortunate guesswork on this buffer size */
+		_buffer = new B (Kumu::Megabyte);
+
+		if (ASDCP_FAILURE (reader->ReadFrame (n, *_buffer, c->decryption()))) {
+			boost::throw_exception (DCPReadError ("could not read frame"));
+		}
+	}
+
+	~Frame ()
+	{
+		delete _buffer;
+	}
+
+	uint8_t const * data () const
+	{
+		return _buffer->RoData ();
+	}
+
+	int size () const
+	{
+		return _buffer->Size ();
+	}
+
+private:
+	B* _buffer;
+};
+
+}