chore: import upstream snapshot with attribution

modules/videoio/test/test_microphone.cpp

@@ -0,0 +1,41 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+// Usage: opencv_test_videoio --gtest_also_run_disabled_tests
+
+#include "test_precomp.hpp"
+
+namespace opencv_test { namespace {
+
+TEST(DISABLED_videoio_micro, basic)
+{
+    int cursize = 0;
+    int validSize = 0;
+    Mat frame;
+
+    std::vector<int> params { CAP_PROP_AUDIO_STREAM, 0, CAP_PROP_VIDEO_STREAM, -1 };
+    VideoCapture cap(0, cv::CAP_MSMF, params);
+    ASSERT_TRUE(cap.isOpened());
+
+    int samplesPerSecond = (int)cap.get(cv::CAP_PROP_AUDIO_SAMPLES_PER_SECOND);
+    const int audio_base_index = (int)cap.get(cv::CAP_PROP_AUDIO_BASE_INDEX);
+
+    const double cvTickFreq = cv::getTickFrequency();
+    int64 sysTimePrev = cv::getTickCount();
+    int64 sysTimeCurr = cv::getTickCount();
+
+    cout << "Audio would be captured for the next 10 seconds" << endl;
+    while ((sysTimeCurr-sysTimePrev)/cvTickFreq < 10)
+    {
+        if (cap.grab())
+        {
+            ASSERT_TRUE(cap.retrieve(frame, audio_base_index));
+            sysTimeCurr = cv::getTickCount();
+        }
+    }
+    validSize = samplesPerSecond*(int)((sysTimeCurr-sysTimePrev)/cvTickFreq);
+    cursize = (int)cap.get(cv::CAP_PROP_AUDIO_POS);
+    ASSERT_LT(validSize - cursize, cursize*0.05);
+}
+
+}} // namespace