jfjoch_process: Increase performance by decompressing image outside of global lock, avoiding extra processing and avoiding extra compression (if writing)

2026-04-29 19:22:22 +02:00
parent b53572e7f1
commit 2317eed841
9 changed files with 155 additions and 50 deletions
@@ -269,6 +269,43 @@ bool JFJochHttpReader::LoadImage_i(std::shared_ptr<JFJochReaderDataset> &dataset
    }
 }

+std::shared_ptr<JFJochReaderRawImage> JFJochHttpReader::GetRawImage(int64_t image_number) {
+    if (addr.empty())
+        return {};
+
+    httplib::Client cli_cmd(addr);
+    auto res = cli_cmd.Get("/image_buffer/image.cbor?id=" + std::to_string(image_number));
+
+    if (!res || res->status != httplib::StatusCode::OK_200 || res->body.empty())
+        return {};
+
+    try {
+        auto msg =
+                CBORStream2Deserialize(reinterpret_cast<uint8_t *>(res->body.data()), res->body.size());
+
+        if (msg->msg_type != CBORImageType::IMAGE)
+            return {};
+
+        std::shared_ptr<JFJochReaderRawImage> image = std::make_shared<JFJochReaderRawImage>();
+        image->image_buffer.resize(msg->data_message->image.GetCompressedSize());
+        memcpy(image->image_buffer.data(),
+               msg->data_message->image.GetCompressed(),
+               msg->data_message->image.GetCompressedSize());
+        image->image = CompressedImage(
+            image->image_buffer.data(),
+            image->image_buffer.size(),
+            msg->data_message->image.GetWidth(),
+            msg->data_message->image.GetHeight(),
+            msg->data_message->image.GetMode(),
+            msg->data_message->image.GetCompressionAlgorithm()
+        );
+
+        return image;
+    } catch (std::exception &e) {
+        return {};
+    }
+}
+
 std::vector<float> JFJochHttpReader::GetPlot_i(const std::string &plot_type, float fill_value) const {
    if (addr.empty())
        return {};