videoio(v4l2): use logging, update handling of EBUSY, device closing

- DEBUG logging compilation is enabled for all videoio backends - eliminate output through perror(), stderr

videoio(v4l2): use logging, update handling of EBUSY, device closing
- DEBUG logging compilation is enabled for all videoio backends - eliminate output through perror(), stderr
501ff7f0 · Alexander Alekhin · 373160ce · 501ff7f0 · 501ff7f0
Commit 501ff7f0 authored Nov 22, 2019 by Alexander Alekhin
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cap_v4l.cpp modules/videoio/src/cap_v4l.cpp +0 -0

precomp.hpp modules/videoio/src/precomp.hpp +6 -0

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--- a/modules/videoio/src/cap_v4l.cpp
+++ b/modules/videoio/src/cap_v4l.cpp
--- a/modules/videoio/src/precomp.hpp
+++ b/modules/videoio/src/precomp.hpp
@@ -48,6 +48,12 @@
 #include "opencv2/core/private.hpp"

 #include <opencv2/core/utils/configuration.private.hpp>
+#include <opencv2/core/utils/logger.defines.hpp>
+#ifdef NDEBUG
+#define CV_LOG_STRIP_LEVEL CV_LOG_LEVEL_DEBUG + 1
+#else
+#define CV_LOG_STRIP_LEVEL CV_LOG_LEVEL_VERBOSE + 1
+#endif
 #include <opencv2/core/utils/logger.hpp>

 #include "opencv2/imgcodecs.hpp"