diff options
Diffstat (limited to 'simple-cam.cpp')
| -rw-r--r-- | simple-cam.cpp | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/simple-cam.cpp b/simple-cam.cpp index 95e472b..1a60602 100644 --- a/simple-cam.cpp +++ b/simple-cam.cpp @@ -163,13 +163,21 @@ int main() * Application lock usage of Camera by 'acquiring' them. * Once done with it, application shall similarly 'release' the Camera. * - * As an example, use the first available camera in the system. + * As an example, use the first available camera in the system after + * making sure that at least one camera is available. * * Cameras can be obtained by their ID or their index, to demonstrate * this, the following code gets the ID of the first camera; then gets * the camera associated with that ID (which is of course the same as * cm->cameras()[0]). */ + if (cm->cameras().empty()) { + std::cout << "No cameras were identified on the system." + << std::endl; + cm->stop(); + return EXIT_FAILURE; + } + std::string cameraId = cm->cameras()[0]->id(); camera = cm->get(cameraId); camera->acquire(); @@ -386,13 +394,6 @@ int main() for (std::unique_ptr<Request> &request : requests) camera->queueRequest(request.get()); - if (!cm->cameras().size()) { - std::cout << "No cameras were identified on the system." - << std::endl; - cm->stop(); - return EXIT_FAILURE; - } - /* * -------------------------------------------------------------------- * Run an EventLoop |