From aa646c58267a6bd2580f3cb30674f4ebd0ed6db7 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Sat, 11 Jul 2020 00:12:50 +0200
Subject: Allow creation of ATMOS sync on channel 14.

---
 src/bitstream.h | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 src/bitstream.h

(limited to 'src/bitstream.h')

diff --git a/src/bitstream.h b/src/bitstream.h
new file mode 100644
index 00000000..1295f79e
--- /dev/null
+++ b/src/bitstream.h
@@ -0,0 +1,61 @@
+/*
+    Copyright (C) 2020 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 <boost/crc.hpp>
+#include <boost/optional.hpp>
+#include <stdint.h>
+#include <vector>
+
+
+namespace dcp {
+
+class Bitstream
+{
+public:
+	void start_crc (uint16_t poly);
+	void write_bit (bool bit);
+	void write_from_byte (uint8_t byte, int bits = 8);
+	void write_from_word (uint32_t word, int bits = 32);
+	void write_crc ();
+
+	std::vector<bool> get() const {
+		return _data;
+	}
+
+private:
+	std::vector<bool> _data;
+	boost::optional<boost::crc_basic<16> > _crc;
+};
+
+}
-- 
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