OIIO: added support for OIIO 1.x

OIIO 2.x uses std::unique_ptr while 1.x uses raw pointers. Olive can now handle
both, manually destroying the raw pointers when necessary if running on OIIO
1.x.

app/codec/oiio/oiiodecoder.cpp

@@ -139,6 +139,9 @@ void OIIODecoder::Close()
 {
   if (image_ != nullptr) {
     image_->close();
+#if OIIO_VERSION < 10903
+    OIIO::ImageInput::destroy(image_);
+#endif
     image_ = nullptr;
   }
 

app/codec/oiio/oiiodecoder.h

@@ -46,7 +46,11 @@ public:
   virtual bool SupportsVideo() override;
 
 private:
+#if OIIO_VERSION < 10903
+  OIIO::ImageInput* image_;
+#else
   std::unique_ptr<OIIO::ImageInput> image_;
+#endif
 
   int width_;
 

app/render/backend/videorenderbackend.cpp

@@ -211,6 +211,10 @@ const char *VideoRenderBackend::GetCachedFrame(const rational &time)
 
         in->close();
 
+#if OIIO_VERSION < 10903
+        OIIO::ImageInput::destroy(in);
+#endif
+
         return cache_frame_load_buffer_.constData();
       } else {
         qWarning() << "OIIO Error:" << OIIO::geterror().c_str();

app/render/backend/videorenderworker.cpp

@@ -226,12 +226,16 @@ void VideoRenderWorker::Download(QVariant texture, QString filename)
 
   std::string working_fn_std = filename.toStdString();
 
-  std::unique_ptr<OIIO::ImageOutput> out = OIIO::ImageOutput::create(working_fn_std);
+  auto out = OIIO::ImageOutput::create(working_fn_std);
 
   if (out) {
     out->open(working_fn_std, spec);
     out->write_image(format_info.oiio_desc, download_buffer_.data());
     out->close();
+
+#if OIIO_VERSION < 10903
+    OIIO::ImageOutput::destroy(out);
+#endif
   } else {
     qWarning() << "Failed to open output file:" << filename;
   }