add functions for heif_unci_image_parameters processing

Author: farindk

libheif/api/libheif/heif_uncompressed.cc

@@ -27,6 +27,54 @@
 #include <memory>
 
 
+struct heif_unci_image_parameters* heif_unci_image_parameters_alloc()
+{
+  auto* params = new heif_unci_image_parameters();
+
+  params->version = 1;
+
+  // --- version 1
+
+  params->image_width = 0;
+  params->image_height = 0;
+
+  // TODO: should we define that tile size = 0 means no tiling?
+  params->tile_width = 0;
+  params->tile_height = 0;
+
+  params->compression = heif_unci_compression_off;
+
+  return params;
+}
+
+
+void heif_unci_image_parameters_copy(struct heif_unci_image_parameters* dst,
+                                     const struct heif_unci_image_parameters* src)
+{
+  if (src == nullptr || dst == nullptr) {
+    return;
+  }
+
+  int min_version = std::min(src->version, dst->version);
+
+  switch (min_version) {
+    case 1:
+      dst->image_width = src->image_width;
+      dst->image_height = src->image_height;
+      dst->tile_width = src->tile_width;
+      dst->tile_height = src->tile_height;
+      dst->compression = src->compression;
+      break;
+  }
+}
+
+
+void heif_unci_image_parameters_release(struct heif_unci_image_parameters* params)
+{
+  delete params;
+}
+
+
 struct heif_error heif_context_add_unci_image(struct heif_context* ctx,
                                               const struct heif_unci_image_parameters* parameters,
                                               const struct heif_encoding_options* encoding_options,

libheif/image-items/unc_image.cc

@@ -283,16 +283,19 @@ Result<Encoder::CodedImageData> ImageItem_uncompressed::encode(const std::shared
 Result<Encoder::CodedImageData> ImageItem_uncompressed::encode_static(const std::shared_ptr<HeifPixelImage>& src_image,
                                                                const struct heif_encoding_options& options)
 {
-  heif_unci_image_parameters parameters{};
-  parameters.image_width = src_image->get_width();
-  parameters.image_height = src_image->get_height();
-  parameters.tile_width = parameters.image_width;
-  parameters.tile_height = parameters.image_height;
+  auto parameters = std::unique_ptr<heif_unci_image_parameters,
+                                    void (*)(heif_unci_image_parameters*)>(heif_unci_image_parameters_alloc(),
+                                                                           heif_unci_image_parameters_release);
+
+  parameters->image_width = src_image->get_width();
+  parameters->image_height = src_image->get_height();
+  parameters->tile_width = parameters->image_width;
+  parameters->tile_height = parameters->image_height;
 
 
   // --- generate configuration property boxes
 
-  Result<unciHeaders> genHeadersResult = generate_headers(src_image, &parameters, &options);
+  Result<unciHeaders> genHeadersResult = generate_headers(src_image, parameters.get(), &options);
   if (genHeadersResult.error) {
     return genHeadersResult.error;
   }