replay: fix qcam download error (#22777)

* fix qcam download error

* test loading qlog/qcamera

selfdrive/ui/replay/filereader.cc

@@ -52,7 +52,7 @@ std::string FileReader::download(const std::string &url, std::atomic<bool> *abor
       std::ostringstream oss;
       result.resize(remote_file_size);
       oss.rdbuf()->pubsetbuf(result.data(), result.size());
-      int chunks = chunk_size_ > 0 ? std::min(1, (int)std::nearbyint(remote_file_size / (float)chunk_size_)) : 1;
+      int chunks = chunk_size_ > 0 ? std::max(1, (int)std::nearbyint(remote_file_size / (float)chunk_size_)) : 1;
       if (httpMultiPartDownload(url, oss, chunks, remote_file_size, abort)) {
         return result;
       }

selfdrive/ui/replay/route.h

@@ -28,7 +28,7 @@ public:
   inline const QString &name() const { return route_.str; }
   inline const RouteIdentifier &identifier() const { return route_; }
   inline const std::map<int, SegmentFile> &segments() const { return segments_; }
-  inline const SegmentFile &at(int n) { return segments_.at(n); }
+  inline SegmentFile &at(int n) { return segments_.at(n); }
   static RouteIdentifier parseRoute(const QString &str);
 
 protected:

selfdrive/ui/replay/tests/test_replay.cc

@@ -57,9 +57,14 @@ TEST_CASE("FileReader") {
 }
 
 TEST_CASE("Segment") {
+  auto test_qlog = GENERATE(false, true);
   Route demo_route(DEMO_ROUTE);
   REQUIRE(demo_route.load());
   REQUIRE(demo_route.segments().size() == 11);
+  if (test_qlog) {
+    demo_route.at(0).road_cam = "";
+    demo_route.at(0).rlog = "";
+  }
 
   QEventLoop loop;
   Segment segment(0, demo_route.at(0), false, false, false);