From c41e8006c7e9a3e796b5f78d3bfc5a97a9e87c4c Mon Sep 17 00:00:00 2001 From: Vladislav Vinogradov Date: Tue, 28 Jan 2014 10:28:00 +0400 Subject: [PATCH] fix #3477: CV_CAP_PROP_SUPPORTED_PREVIEW_SIZES_STRING property is not supported by all VideoCapture backends. Some backends can return 0.0 or -1.0. --- modules/java/generator/src/cpp/VideoCapture.cpp | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/modules/java/generator/src/cpp/VideoCapture.cpp b/modules/java/generator/src/cpp/VideoCapture.cpp index a9d0a56c1c..e4a8bc25a9 100644 --- a/modules/java/generator/src/cpp/VideoCapture.cpp +++ b/modules/java/generator/src/cpp/VideoCapture.cpp @@ -329,7 +329,10 @@ JNIEXPORT jstring JNICALL Java_org_opencv_highgui_VideoCapture_n_1getSupportedPr VideoCapture* me = (VideoCapture*) self; //TODO: check for NULL union {double prop; const char* name;} u; u.prop = me->get(CV_CAP_PROP_SUPPORTED_PREVIEW_SIZES_STRING); - return env->NewStringUTF(u.name); + // VideoCapture::get can return 0.0 or -1.0 if it doesn't support + // CV_CAP_PROP_SUPPORTED_PREVIEW_SIZES_STRING + if (u.prop != 0.0 && u.prop != -1.0) + return env->NewStringUTF(u.name); } catch(const std::exception &e) { throwJavaException(env, &e, method_name); } catch (...) {