Add Atmos read/write and untested MXF decryption tool.1.0-templates

1 files changed, 109 insertions, 0 deletions

diff --git a/src/atmos_asset_writer.cc b/src/atmos_asset_writer.cc
new file mode 100644
index 00000000..eb0d608a
--- /dev/null
+++ b/src/atmos_asset_writer.cc
@@ -0,0 +1,109 @@
+/*
+    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 "atmos_asset_writer.h"
+#include "atmos_asset.h"
+#include "exceptions.h"
+#include "dcp_assert.h"
+#include "compose.hpp"
+#include "encryption_context.h"
+#include <asdcp/AS_DCP.h>
+
+using std::min;
+using std::max;
+using namespace dcp;
+
+struct AtmosAssetWriter::ASDCPState
+{
+	ASDCP::ATMOS::MXFWriter mxf_writer;
+	ASDCP::DCData::FrameBuffer frame_buffer;
+	ASDCP::WriterInfo writer_info;
+	ASDCP::ATMOS::AtmosDescriptor desc;
+};
+
+AtmosAssetWriter::AtmosAssetWriter (AtmosAsset* asset, boost::filesystem::path file)
+	: AssetWriter (asset, file, SMPTE)
+	, _state (new AtmosAssetWriter::ASDCPState)
+	, _asset (asset)
+{
+	_state->desc.EditRate = ASDCP::Rational (_asset->edit_rate().numerator, _asset->edit_rate().denominator);
+	_state->desc.FirstFrame = _asset->first_frame ();
+	_state->desc.MaxChannelCount = _asset->max_channel_count ();
+	_state->desc.MaxObjectCount = _asset->max_object_count ();
+
+	unsigned int c;
+	Kumu::hex2bin (_asset->atmos_id().c_str(), _state->desc.AtmosID, ASDCP::UUIDlen, &c);
+	DCP_ASSERT (c == ASDCP::UUIDlen);
+
+	_state->desc.AtmosVersion = 0;
+
+	_asset->fill_writer_info (&_state->writer_info, _asset->id(), SMPTE);
+}
+
+void
+AtmosAssetWriter::write (uint8_t const * data, int size)
+{
+	DCP_ASSERT (!_finalized);
+
+	if (!_started) {
+		Kumu::Result_t r = _state->mxf_writer.OpenWrite (_file.string().c_str(), _state->writer_info, _state->desc);
+		if (ASDCP_FAILURE (r)) {
+			boost::throw_exception (FileError ("could not open atmos MXF for writing", _file.string(), r));
+		}
+
+		_asset->set_file (_file);
+		_started = true;
+	}
+
+	_state->frame_buffer.Capacity (size);
+	_state->frame_buffer.Size (size);
+	memcpy (_state->frame_buffer.Data(), data, size);
+
+	ASDCP::Result_t const r = _state->mxf_writer.WriteFrame (_state->frame_buffer, _encryption_context->encryption(), _encryption_context->hmac());
+	if (ASDCP_FAILURE (r)) {
+		boost::throw_exception (MiscError (String::compose ("could not write atmos MXF frame (%1)", int (r))));
+	}
+
+	++_frames_written;
+}
+
+bool
+AtmosAssetWriter::finalize ()
+{
+	if (_started && ASDCP_FAILURE (_state->mxf_writer.Finalize())) {
+		boost::throw_exception (MiscError ("could not finalise atmos MXF"));
+	}
+
+	_asset->_intrinsic_duration = _frames_written;
+	return AssetWriter::finalize ();
+}