Added new video posiitioning test

modules/highgui/test/test_video_pos.cpp

@@ -0,0 +1,167 @@
+/*M///////////////////////////////////////////////////////////////////////////////////////
+//
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+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                          License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
+// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
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+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors "as is" and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+//M*/
+
+#include "test_precomp.hpp"
+#include "opencv2/highgui/highgui.hpp"
+
+#ifdef HAVE_FFMPEG
+
+#include "ffmpeg_codecs.hpp"
+
+using namespace cv;
+using namespace std;
+
+class CV_PositioningTest : public cvtest::BaseTest
+{
+public:
+    void CreateTestVideo(const string& format, int codec);
+    void run(int);
+};
+
+void CV_PositioningTest::CreateTestVideo(const string& format, int codec)
+{
+ const size_t frame_count = 2500;
+
+ stringstream s; s << codec;
+
+ cv::VideoWriter writer(ts->get_data_path()+"video/test_video_"+s.str()+format, codec, 25, cv::Size(640, 480), false);
+
+ for (size_t i = 0; i < frame_count; ++i)
+ {
+   cv::Mat mat(480, 640, CV_8UC1);
+   size_t n = 32, tmp = i;
+   vector<char> tmp_code; tmp_code.clear();
+
+    while ( tmp > 1 )
+    {
+        tmp_code.push_back(tmp%2);
+        tmp /= 2;
+    }
+    tmp_code.push_back(1);
+
+    vector<char> i_code(n);
+    for (size_t j = 0; j < n; ++j)
+    {
+    char val = j < n - tmp_code.size() ? 0 : tmp_code.at(j+tmp_code.size()-n);
+    i_code.push_back(val);
+    }
+
+    const size_t w = 480/n;
+
+    for (size_t j = 0; j < n; ++j)
+    {
+        for (size_t k = w*j; k < w*(j+1); ++k)
+        mat.row(k) = i_code[j] ? 255*cv::Mat::ones(1, 640, CV_8UC1) : cv::Mat::zeros(1, 640, CV_8UC1);
+    }
+
+    writer << mat;
+
+    //imshow("test image", mat); waitKey();
+
+ }
+
+ writer.~VideoWriter();
+}
+
+void CV_PositioningTest::run(int)
+{
+    const size_t n_codec = sizeof(codec_bmp_tags)/sizeof(codec_bmp_tags[0]);
+
+    const string format[] =  {"avi", "mov", "mp4", "mpg", "wmv"};
+    const size_t n_format = sizeof(format)/sizeof(format[0]);
+
+    for (size_t i = 0; i < n_format; ++i)
+    for (size_t j = 0; j < n_codec; ++j)
+    {
+     CreateTestVideo(format[i], codec_bmp_tags[j].tag);
+
+     stringstream s; s << codec_bmp_tags[j].tag;
+	
+    cv::VideoCapture cap(ts->get_data_path()+"video/test_video_"+s.str()+format[i]);
+	cap.set(CV_CAP_PROP_POS_FRAMES, 0.0);
+
+	int N = cap.get(CV_CAP_PROP_FRAME_COUNT);
+
+	vector <int> idx;
+
+	RNG rng(N);
+	idx.clear();
+	for( int i = 0; i < N-1; i++ )
+	idx.push_back(rng.uniform(0, N));
+    idx.push_back(N-1);
+	swap(idx.at(rng.uniform(0, N-1)), idx.at(N-1));
+
+    for (int i = 0; i < N; ++i)
+	{
+		cap.set(CV_CAP_PROP_POS_FRAMES, (double)idx[i]);
+
+		cv::Mat img;  cap.retrieve(img);
+
+		const double thresh = 128.0;
+
+		const size_t n = 32, w = img.rows/n;
+
+		int index = 0, deg = n-1;
+
+		for (size_t j = 0; j < n; ++j)
+		{
+			cv::Mat mat = img.rowRange(w*j, w*(j+1)-1);
+			Scalar mat_mean = cv::mean(mat);
+			if (mat_mean[0] > thresh)
+			{
+				index += (2<<deg);
+			}
+
+			deg--;
+		}
+
+		if (index != idx[i])
+		{
+            ts->printf(ts->LOG, "Required position: %d   Returned position: %d\n   FAILED", idx[i], index);
+		}
+	}
+    }
+}
+
+TEST(Highgui_Positioning, regression) { CV_PositioningTest test; test.safe_run(); }
+
+#endif