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#include "test_precomp.hpp"
#include "opencv2/videoio.hpp"
using namespace cv;
using namespace std;
class CV_PositioningTest : public cvtest::BaseTest
{
public:
CV_PositioningTest()
{
framesize = Size(640, 480);
}
Mat drawFrame(int i)
{
Mat mat = Mat::zeros(framesize, CV_8UC3);
mat = Scalar(fabs(cos(i*0.08)*255), fabs(sin(i*0.05)*255), i);
putText(mat, format("%03d", i), Point(10, 350), 0, 10, Scalar(128, 255, 255), 15);
return mat;
}
string getFilename(const cvtest::VideoFormat& fmt)
{
return cv::tempfile((cvtest::fourccToString(fmt.fourcc) + "." + fmt.ext).c_str());
}
bool CreateTestVideo(const cvtest::VideoFormat& fmt, int framecount, string filename)
{
VideoWriter writer(filename, fmt.fourcc, 25, framesize, true);
if( !writer.isOpened() )
return false;
for (int i = 0; i < framecount; ++i)
{
Mat img = drawFrame(i);
writer << img;
}
return true;
}
void run(int)
{
int n_frames = 100;
for( int testcase = 0; ; testcase++ )
{
const cvtest::VideoFormat& fmt = cvtest::g_specific_fmt_list[testcase];
if( fmt.empty() )
break;
string filename = getFilename(fmt);
ts->printf(ts->LOG, "\nFile: %s\n", filename.c_str());
if( !CreateTestVideo(fmt, n_frames, filename) )
{
ts->printf(ts->LOG, "\nError: cannot create video file");
ts->set_failed_test_info(ts->FAIL_INVALID_OUTPUT);
return;
}
VideoCapture cap(filename);
if (!cap.isOpened())
{
ts->printf(ts->LOG, "\nError: cannot read video file.");
ts->set_failed_test_info(ts->FAIL_INVALID_TEST_DATA);
return;
}
int N0 = (int)cap.get(CAP_PROP_FRAME_COUNT);
cap.set(CAP_PROP_POS_FRAMES, 0);
int N = (int)cap.get(CAP_PROP_FRAME_COUNT);
// See the same hack in CV_VideoIOTest::SpecificVideoTest for explanation.
int allowed_extra_frames = 0;
if (fmt.fourcc == VideoWriter::fourcc('M', 'P', 'E', 'G') && fmt.ext == "mkv")
allowed_extra_frames = 1;
if (N < n_frames || N > n_frames + allowed_extra_frames || N != N0)
{
ts->printf(ts->LOG, "\nError: returned frame count (N0=%d, N=%d) is different from the reference number %d\n", N0, N, n_frames);
ts->set_failed_test_info(ts->FAIL_INVALID_OUTPUT);
return;
}
for (int k = 0; k < n_frames; ++k)
{
int idx = theRNG().uniform(0, n_frames);
if( !cap.set(CAP_PROP_POS_FRAMES, idx) )
{
ts->printf(ts->LOG, "\nError: cannot seek to frame %d.\n", idx);
ts->set_failed_test_info(ts->FAIL_INVALID_OUTPUT);
return;
}
int idx1 = (int)cap.get(CAP_PROP_POS_FRAMES);
Mat img; cap >> img;
Mat img0 = drawFrame(idx);
if( idx != idx1 )
{
ts->printf(ts->LOG, "\nError: the current position (%d) after seek is different from specified (%d)\n",
idx1, idx);
ts->printf(ts->LOG, "Saving both frames ...\n");
ts->set_failed_test_info(ts->FAIL_INVALID_OUTPUT);
return;
}
if (img.empty())
{
ts->printf(ts->LOG, "\nError: cannot read a frame at position %d.\n", idx);
ts->set_failed_test_info(ts->FAIL_INVALID_OUTPUT);
return;
}
double err = cvtest::PSNR(img, img0);
if( err < 20 )
{
ts->printf(ts->LOG, "The frame read after positioning to %d is incorrect (PSNR=%g)\n", idx, err);
ts->printf(ts->LOG, "Saving both frames ...\n");
ts->set_failed_test_info(ts->FAIL_INVALID_OUTPUT);
return;
}
}
}
}
Size framesize;
};
#if BUILD_WITH_VIDEO_INPUT_SUPPORT && BUILD_WITH_VIDEO_OUTPUT_SUPPORT && defined HAVE_FFMPEG
TEST(Videoio_Video, seek_random_synthetic) { CV_PositioningTest test; test.safe_run(); }
#endif