merged encoder and decoder code into one folder since they can share quite a bit of code

app/codec/oiio/oiiodecoder.h

@@ -0,0 +1,65 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2019 Olive Team
+
+  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 3 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, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#ifndef OIIODECODER_H
+#define OIIODECODER_H
+
+#include <OpenImageIO/imageio.h>
+
+#include "codec/decoder.h"
+#include "render/pixelservice.h"
+
+class OIIODecoder : public Decoder
+{
+public:
+  OIIODecoder();
+
+  virtual QString id() override;
+
+  virtual bool Probe(Footage *f) override;
+
+  virtual bool Open() override;
+
+  virtual FramePtr RetrieveVideo(const rational &timecode) override;
+
+  virtual void Close() override;
+
+  virtual int64_t GetTimestampFromTime(const rational &time) override;
+
+  virtual bool SupportsVideo() override;
+
+private:
+  std::unique_ptr<OIIO::ImageInput> image_;
+
+  int width_;
+
+  int height_;
+
+  olive::PixelFormat pix_fmt_;
+
+  PixelFormatInfo pix_fmt_info_;
+
+  bool is_rgba_;
+
+  FramePtr frame_;
+
+};
+
+#endif // OIIODECODER_H