chore: import upstream snapshot with attribution

2026-07-13 12:06:04 +08:00
commit 86c9b1c39f
7743 changed files with 3316339 additions and 0 deletions
@@ -0,0 +1,57 @@
+#include <opencv2/core.hpp>
+#include <opencv2/videoio.hpp>
+#include <opencv2/highgui.hpp>
+#include <iostream>
+
+using namespace cv;
+using namespace std;
+
+int main(int, char**)
+{
+    Mat frame;
+    vector<Mat> audioData;
+    VideoCapture cap;
+    vector<int> params {    CAP_PROP_AUDIO_STREAM, 0,
+                            CAP_PROP_VIDEO_STREAM, -1   };
+
+    cap.open(0, CAP_MSMF, params);
+    if (!cap.isOpened())
+    {
+        cerr << "ERROR! Can't to open microphone" << endl;
+        return -1;
+    }
+
+    const int audioBaseIndex = (int)cap.get(CAP_PROP_AUDIO_BASE_INDEX);
+    const int numberOfChannels = (int)cap.get(CAP_PROP_AUDIO_TOTAL_CHANNELS);
+    cout << "CAP_PROP_AUDIO_DATA_DEPTH: " << depthToString((int)cap.get(CAP_PROP_AUDIO_DATA_DEPTH)) << endl;
+    cout << "CAP_PROP_AUDIO_SAMPLES_PER_SECOND: " << cap.get(CAP_PROP_AUDIO_SAMPLES_PER_SECOND) << endl;
+    cout << "CAP_PROP_AUDIO_TOTAL_CHANNELS: " << numberOfChannels << endl;
+    cout << "CAP_PROP_AUDIO_TOTAL_STREAMS: " << cap.get(CAP_PROP_AUDIO_TOTAL_STREAMS) << endl;
+
+    const double cvTickFreq = getTickFrequency();
+    int64 sysTimeCurr = getTickCount();
+    int64 sysTimePrev = sysTimeCurr;
+    while ((sysTimeCurr-sysTimePrev)/cvTickFreq < 10)
+    {
+        if (cap.grab())
+        {
+            for (int nCh = 0; nCh < numberOfChannels; nCh++)
+            {
+                cap.retrieve(frame, audioBaseIndex+nCh);
+                audioData.push_back(frame);
+                sysTimeCurr = getTickCount();
+            }
+        }
+        else
+        {
+            cerr << "Grab error" << endl;
+            break;
+        }
+    }
+    int numberOfSamles = 0;
+    for (auto item : audioData)
+        numberOfSamles+=item.cols;
+    cout << "Number of samples: " << numberOfSamles << endl;
+
+    return 0;
+}