Initial commit. Working.

2026-09-29 10:08:05 +01:00
commit 8e9d1e294c
10 changed files with 585 additions and 0 deletions
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+//=============================================================================
+// fc2view — minimal live viewer for Point Grey / FLIR FlyCapture2 cameras.
+//
+// The vendor GUI (FlyCap2) can't run on Ubuntu 24.04 (dead GTK2 deps), so
+// this is a small native replacement built on OpenCV. It connects to the
+// first camera on the bus, streams frames into a window, and lets you save
+// snapshots.
+//
+//   Keys:  q or Esc  quit
+//          s          save a snapshot (PNG, native bit depth) to $PWD
+//
+// Build:  g++ fc2view.cpp -I/usr/include/flycapture \
+//             $(pkg-config --cflags --libs opencv4) -lflycapture -o fc2view
+//=============================================================================
+
+#include "FlyCapture2.h"
+#include <opencv2/opencv.hpp>
+
+#include <ctime>
+#include <iomanip>
+#include <iostream>
+#include <sstream>
+
+using namespace FlyCapture2;
+
+static void printError(const Error &e) { e.PrintErrorTrace(); }
+
+// Timestamped filename like fc2-<serial>-20260929-142530.png
+static std::string snapshotName(unsigned int serial)
+{
+    std::time_t t = std::time(nullptr);
+    std::tm tm = *std::localtime(&t);
+    std::ostringstream s;
+    s << "fc2-" << serial << "-"
+      << std::put_time(&tm, "%Y%m%d-%H%M%S") << ".png";
+    return s.str();
+}
+
+int main()
+{
+    BusManager busMgr;
+    unsigned int numCameras = 0;
+    Error error = busMgr.GetNumOfCameras(&numCameras);
+    if (error != PGRERROR_OK) { printError(error); return 1; }
+    if (numCameras == 0)
+    {
+        std::cerr << "No FlyCapture2 cameras detected. Check `lsusb` for "
+                     "1e10:xxxx and your 'flirimaging' group membership.\n";
+        return 1;
+    }
+
+    PGRGuid guid;
+    error = busMgr.GetCameraFromIndex(0, &guid);
+    if (error != PGRERROR_OK) { printError(error); return 1; }
+
+    Camera cam;
+    error = cam.Connect(&guid);
+    if (error != PGRERROR_OK) { printError(error); return 1; }
+
+    CameraInfo camInfo;
+    if (cam.GetCameraInfo(&camInfo) == PGRERROR_OK)
+    {
+        std::cout << "Connected: " << camInfo.modelName
+                  << "  serial " << camInfo.serialNumber
+                  << "  (" << camInfo.sensorResolution << ")\n";
+    }
+
+    error = cam.StartCapture();
+    if (error != PGRERROR_OK) { printError(error); cam.Disconnect(); return 1; }
+
+    const std::string win = "fc2view";
+    cv::namedWindow(win, cv::WINDOW_NORMAL);
+    std::cout << "Streaming. Keys: 'q'/Esc quit, 's' save snapshot.\n";
+
+    Image rawImage, bgrImage;
+    while (true)
+    {
+        error = cam.RetrieveBuffer(&rawImage);
+        if (error != PGRERROR_OK) { printError(error); continue; }
+
+        // Convert whatever the sensor delivers (mono, Bayer, ...) to 8-bit BGR
+        // so it maps straight onto an OpenCV CV_8UC3 Mat with no reordering.
+        error = rawImage.Convert(PIXEL_FORMAT_BGR, &bgrImage);
+        if (error != PGRERROR_OK) { printError(error); continue; }
+
+        cv::Mat frame(bgrImage.GetRows(), bgrImage.GetCols(), CV_8UC3,
+                      bgrImage.GetData(), bgrImage.GetStride());
+        if (frame.empty()) continue;
+
+        cv::imshow(win, frame);
+
+        int key = cv::waitKey(1) & 0xFF;
+        if (key == 'q' || key == 27) break;          // q or Esc
+        if (key == 's')
+        {
+            // Save the raw frame so native bit depth (e.g. Mono16 on a SWIR
+            // sensor) is preserved, not the 8-bit display copy.
+            std::string name = snapshotName(camInfo.serialNumber);
+            PNGOption png;
+            if (rawImage.Save(name.c_str(), &png) == PGRERROR_OK)
+                std::cout << "Saved " << name << "\n";
+            else
+                std::cerr << "Failed to save " << name << "\n";
+        }
+    }
+
+    cam.StopCapture();
+    cam.Disconnect();
+    cv::destroyAllWindows();
+    return 0;
+}