ts: test case list is printed after cmd line parsing, refactored

modules/core/include/opencv2/core/utility.hpp

@@ -457,6 +457,18 @@ Returns empty string if feature is not defined
 */
 CV_EXPORTS_W String getHardwareFeatureName(int feature);
 
+/** @brief Returns list of CPU features enabled during compilation.
+
+Returned value is a string containing space separated list of CPU features with following markers:
+
+- no markers - baseline features
+- prefix `*` - features enabled in dispatcher
+- suffix `?` - features enabled but not available in HW
+
+Example: `SSE SSE2 SSE3 *SSE4.1 *SSE4.2 *FP16 *AVX *AVX2 *AVX512-SKX?`
+*/
+CV_EXPORTS std::string getCPUFeaturesLine();
+
 /** @brief Returns the number of logical CPUs available for the process.
  */
 CV_EXPORTS_W int getNumberOfCPUs();

modules/core/src/system.cpp

@@ -654,6 +654,27 @@ String getHardwareFeatureName(int feature)
     return name ? String(name) : String();
 }
 
+std::string getCPUFeaturesLine()
+{
+    const int features[] = { CV_CPU_BASELINE_FEATURES, CV_CPU_DISPATCH_FEATURES };
+    const int sz = sizeof(features) / sizeof(features[0]);
+    std::string result;
+    std::string prefix;
+    for (int i = 1; i < sz; ++i)
+    {
+        if (features[i] == 0)
+        {
+            prefix = "*";
+            continue;
+        }
+        if (i != 1) result.append(" ");
+        result.append(prefix);
+        result.append(getHWFeatureNameSafe(features[i]));
+        if (!checkHardwareSupport(features[i])) result.append("?");
+    }
+    return result;
+}
+
 volatile bool useOptimizedFlag = true;
 
 void setUseOptimized( bool flag )