improved render channel count system

app/common/oiioutils.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 OIIOUTILS_H
+#define OIIOUTILS_H
+
+#include <OpenImageIO/imagebuf.h>
+#include <OpenImageIO/typedesc.h>
+
+#include "codec/frame.h"
+#include "render/videoparams.h"
+
+OLIVE_NAMESPACE_ENTER
+
+class OIIOUtils {
+public:
+  static OIIO::TypeDesc::BASETYPE GetOIIOBaseTypeFromFormat(VideoParams::Format format)
+  {
+    switch (format) {
+    case VideoParams::kFormatUnsigned8:
+      return OIIO::TypeDesc::UINT8;
+    case VideoParams::kFormatUnsigned16:
+      return OIIO::TypeDesc::UINT16;
+    case VideoParams::kFormatFloat16:
+      return OIIO::TypeDesc::HALF;
+    case VideoParams::kFormatFloat32:
+      return OIIO::TypeDesc::FLOAT;
+    case VideoParams::kFormatInvalid:
+    case VideoParams::kFormatCount:
+      break;
+    }
+
+    return OIIO::TypeDesc::UNKNOWN;
+  }
+
+  static void FrameToBuffer(const Frame *frame, OIIO::ImageBuf* buf);
+
+  static void BufferToFrame(OIIO::ImageBuf* buf, Frame* frame);
+
+  static VideoParams::Format GetFormatFromOIIOBasetype(OIIO::TypeDesc::BASETYPE type);
+
+  static rational GetPixelAspectRatioFromOIIO(const OIIO::ImageSpec& spec);
+
+};
+
+OLIVE_NAMESPACE_EXIT
+
+#endif // OIIOUTILS_H