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Diffstat (limited to 'Documentation/guides/application-developer.rst')
| -rw-r--r-- | Documentation/guides/application-developer.rst | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/Documentation/guides/application-developer.rst b/Documentation/guides/application-developer.rst index 41a7d883..cafb24b1 100644 --- a/Documentation/guides/application-developer.rst +++ b/Documentation/guides/application-developer.rst @@ -109,10 +109,18 @@ the Camera Manager reports as available to applications. Camera devices are stored by the CameraManager in a list accessible by index, or can be retrieved by name through the ``CameraManager::get()`` function. The code below retrieves the name of the first available camera and gets the camera -by name from the Camera Manager. +by name from the Camera Manager, after making sure that at least one camera is +available. .. code:: cpp + 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); |