1 files changed, 79 insertions, 0 deletions
diff --git a/src/lib/cuda_decoder.h b/src/lib/cuda_decoder.h
new file mode 100644
index 000000000..63983861f
--- /dev/null
+++ b/src/lib/cuda_decoder.h
@@ -0,0 +1,79 @@
+/*
+    Copyright (C) 2022 Carl Hetherington <cth@carlh.net>
+
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic 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.
+
+    DCP-o-matic 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 DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+
+#include "image.h"
+#include <dcp/array_data.h>
+extern "C" {
+#include <libavutil/pixfmt.h>
+}
+#include <nvjpeg2k.h>
+#include <boost/thread.hpp>
+#include <boost/thread/condition.hpp>
+#include <boost/thread/mutex.hpp>
+#include <memory>
+#include <queue>
+
+
+class CUDADecoder
+{
+public:
+	CUDADecoder();
+	~CUDADecoder();
+
+	CUDADecoder(CUDADecoder &) = delete;
+	CUDADecoder(CUDADecoder &&) = delete;
+
+	std::shared_ptr<Image> decode(std::shared_ptr<const dcp::Data> j2k_data, int reduce, AVPixelFormat pixel_format, Image::Alignment alignment);
+
+	static CUDADecoder* instance();
+
+private:
+	typedef uint64_t ID;
+
+	class QueueItem
+	{
+	public:
+		ID id;
+		std::shared_ptr<const dcp::Data> data;
+		int reduce;
+		AVPixelFormat pixel_format;
+		Image::Alignment alignment;
+	};
+
+	void thread();
+	std::shared_ptr<Image> decode_one(QueueItem const& input, nvjpeg2kHandle_t handle, nvjpeg2kDecodeState_t state, nvjpeg2kStream_t jpeg2k_stream);
+	void check_jpeg2k(std::string name, nvjpeg2kStatus_t status);
+
+	std::queue<QueueItem> _queue;
+	std::map<ID, std::shared_ptr<Image>> _output;
+	boost::condition _queue_empty_condition;
+	boost::condition _complete_condition;
+	boost::mutex _mutex;
+	boost::thread _thread;
+	ID _next_id = 0;
+	dcp::Size _allocation;
+	uint16_t* _device[3] = { nullptr, nullptr, nullptr };
+	size_t _pitch[3];
+	std::vector<uint16_t> _host[3];
+
+	static CUDADecoder* _instance;
+};
+