Add Reader classes to permit much more efficient DCP reading.

1 files changed, 49 insertions, 0 deletions

diff --git a/src/sound_asset_reader.cc b/src/sound_asset_reader.cc
new file mode 100644
index 00000000..816f5add
--- /dev/null
+++ b/src/sound_asset_reader.cc
@@ -0,0 +1,49 @@
+/*
+    Copyright (C) 2016 Carl Hetherington <cth@carlh.net>
+
+    This program 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.
+
+    This program 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 this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include "sound_asset_reader.h"
+#include "sound_asset.h"
+#include "sound_frame.h"
+#include "exceptions.h"
+#include "AS_DCP.h"
+
+using boost::shared_ptr;
+using namespace dcp;
+
+SoundAssetReader::SoundAssetReader (SoundAsset const * asset)
+	: AssetReader (asset)
+{
+	_reader = new ASDCP::PCM::MXFReader ();
+	Kumu::Result_t const r = _reader->OpenRead (asset->file().string().c_str());
+	if (ASDCP_FAILURE (r)) {
+		delete _reader;
+		boost::throw_exception (FileError ("could not open MXF file for reading", asset->file(), r));
+	}
+}
+
+SoundAssetReader::~SoundAssetReader ()
+{
+	delete _reader;
+}
+
+shared_ptr<const SoundFrame>
+SoundAssetReader::get_frame (int n) const
+{
+	return shared_ptr<const SoundFrame> (new SoundFrame (_reader, n, _decryption_context));
+}