Rearrange encoder threading.

Soon we'll add a new encoder type, and the existing structure was
already creaking a bit at the seams while handling local and remote
encodes.  Here we split out an encoder thread and introduce the concept
of a "sync" thread (which blocks while the encoding is happening).
Later we'll have another type which submits the encode request to a
GPU and receives the reply back later.

1 files changed, 53 insertions, 0 deletions

diff --git a/src/lib/j2k_encoder_thread.h b/src/lib/j2k_encoder_thread.h
new file mode 100644
index 000000000..b03b6f356
--- /dev/null
+++ b/src/lib/j2k_encoder_thread.h
@@ -0,0 +1,53 @@
+/*
+    Copyright (C) 2023 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/>.
+
+*/
+
+
+#ifndef DCPOMATIC_J2K_ENCODER_THREAD
+#define DCPOMATIC_J2K_ENCODER_THREAD
+
+
+#include <boost/thread.hpp>
+
+
+class J2KEncoder;
+
+
+class J2KEncoderThread
+{
+public:
+	J2KEncoderThread(J2KEncoder& encoder);
+
+	J2KEncoderThread(J2KEncoderThread const&) = delete;
+	J2KEncoderThread& operator=(J2KEncoderThread const&) = delete;
+
+	void start();
+	void stop();
+
+	virtual void run() = 0;
+
+protected:
+	J2KEncoder& _encoder;
+
+private:
+	boost::thread _thread;
+};
+
+
+#endif