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fix #3477:

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CV_CAP_PROP_SUPPORTED_PREVIEW_SIZES_STRING property is not supported
by all VideoCapture backends. Some backends can return 0.0 or -1.0.(cherry picked from commit c41e8006c7)
This commit is contained in:
Vladislav Vinogradov 2014-01-28 10:28:00 +04:00 committed by Alexander Smorkalov
parent 2c7cf52e3b
commit 5f88e2b496
1 changed files with 4 additions and 1 deletions
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3
modules/java/generator/src/cpp/VideoCapture.cpp
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@ -329,6 +329,9 @@ 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);
// 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);