root/modules/videoio/test/test_video_io.cpp

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DEFINITIONS

This source file includes following definitions.
  1. fourccToString
  2. ImageTest
  3. VideoTest
  4. SpecificImageTest
  5. SpecificVideoTest
  6. run
  7. run
  8. run
  9. run
  10. TEST
  11. TEST
  12. TEST
  13. TEST

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#include "test_precomp.hpp"
#include "opencv2/videoio/videoio_c.h"

using namespace cv;
using namespace std;

namespace cvtest
{

string fourccToString(int fourcc)
{
    return format("%c%c%c%c", fourcc & 255, (fourcc >> 8) & 255, (fourcc >> 16) & 255, (fourcc >> 24) & 255);
}

#ifdef HAVE_MSMF
const VideoFormat g_specific_fmt_list[] =
{
        /*VideoFormat("wmv", CV_FOURCC_MACRO('d', 'v', '2', '5')),
        VideoFormat("wmv", CV_FOURCC_MACRO('d', 'v', '5', '0')),
        VideoFormat("wmv", CV_FOURCC_MACRO('d', 'v', 'c', ' ')),
        VideoFormat("wmv", CV_FOURCC_MACRO('d', 'v', 'h', '1')),
        VideoFormat("wmv", CV_FOURCC_MACRO('d', 'v', 'h', 'd')),
        VideoFormat("wmv", CV_FOURCC_MACRO('d', 'v', 's', 'd')),
        VideoFormat("wmv", CV_FOURCC_MACRO('d', 'v', 's', 'l')),
        VideoFormat("wmv", CV_FOURCC_MACRO('H', '2', '6', '3')),
        VideoFormat("wmv", CV_FOURCC_MACRO('M', '4', 'S', '2')),
        VideoFormat("avi", CV_FOURCC_MACRO('M', 'J', 'P', 'G')),
        VideoFormat("mp4", CV_FOURCC_MACRO('M', 'P', '4', 'S')),
        VideoFormat("mp4", CV_FOURCC_MACRO('M', 'P', '4', 'V')),
        VideoFormat("wmv", CV_FOURCC_MACRO('M', 'P', '4', '3')),
        VideoFormat("wmv", CV_FOURCC_MACRO('M', 'P', 'G', '1')),
        VideoFormat("wmv", CV_FOURCC_MACRO('M', 'S', 'S', '1')),
        VideoFormat("wmv", CV_FOURCC_MACRO('M', 'S', 'S', '2')),*/
#if !defined(_M_ARM)
        VideoFormat("wmv", CV_FOURCC_MACRO('W', 'M', 'V', '1')),
        VideoFormat("wmv", CV_FOURCC_MACRO('W', 'M', 'V', '2')),
#endif
        VideoFormat("wmv", CV_FOURCC_MACRO('W', 'M', 'V', '3')),
        VideoFormat("avi", CV_FOURCC_MACRO('H', '2', '6', '4')),
        //VideoFormat("wmv", CV_FOURCC_MACRO('W', 'V', 'C', '1')),
        VideoFormat()
};
#else
const VideoFormat g_specific_fmt_list[] =
{
    VideoFormat("avi", VideoWriter::fourcc('X', 'V', 'I', 'D')),
    VideoFormat("avi", VideoWriter::fourcc('M', 'P', 'E', 'G')),
    VideoFormat("avi", VideoWriter::fourcc('M', 'J', 'P', 'G')),
    //VideoFormat("avi", VideoWriter::fourcc('I', 'Y', 'U', 'V')),
    VideoFormat("mkv", VideoWriter::fourcc('X', 'V', 'I', 'D')),
    VideoFormat("mkv", VideoWriter::fourcc('M', 'P', 'E', 'G')),
    VideoFormat("mkv", VideoWriter::fourcc('M', 'J', 'P', 'G')),
#ifndef HAVE_GSTREAMER
    VideoFormat("mov", VideoWriter::fourcc('m', 'p', '4', 'v')),
#endif
    VideoFormat()
};
#endif

}

class CV_VideoIOTest : public cvtest::BaseTest
{
protected:
    void ImageTest (const string& dir);
    void VideoTest (const string& dir, const cvtest::VideoFormat& fmt);
    void SpecificImageTest (const string& dir);
    void SpecificVideoTest (const string& dir, const cvtest::VideoFormat& fmt);

    CV_VideoIOTest() {}
    ~CV_VideoIOTest() {}
    virtual void run(int) = 0;
};

class CV_ImageTest : public CV_VideoIOTest
{
public:
    CV_ImageTest() {}
    ~CV_ImageTest() {}
    void run(int);
};

class CV_SpecificImageTest : public CV_VideoIOTest
{
public:
    CV_SpecificImageTest() {}
    ~CV_SpecificImageTest() {}
    void run(int);
};

class CV_VideoTest : public CV_VideoIOTest
{
public:
    CV_VideoTest() {}
    ~CV_VideoTest() {}
    void run(int);
};

class CV_SpecificVideoTest : public CV_VideoIOTest
{
public:
    CV_SpecificVideoTest() {}
    ~CV_SpecificVideoTest() {}
    void run(int);
};


void CV_VideoIOTest::ImageTest(const string& dir)
{
    string _name = dir + string("../cv/shared/baboon.png");
    ts->printf(ts->LOG, "reading image : %s\n", _name.c_str());

    Mat image = imread(_name);
    image.convertTo(image, CV_8UC3);

    if (image.empty())
    {
        ts->set_failed_test_info(ts->FAIL_MISSING_TEST_DATA);
        return;
    }

    const string exts[] = {
#ifdef HAVE_PNG
        "png",
#endif
#ifdef HAVE_TIFF
        "tiff",
#endif
#ifdef HAVE_JPEG
        "jpg",
#endif
#ifdef HAVE_JASPER
        "jp2",
#endif
#if 0 /*defined HAVE_OPENEXR && !defined __APPLE__*/
        "exr",
#endif
        "bmp",
        "ppm",
        "ras"
        };
    const size_t ext_num = sizeof(exts)/sizeof(exts[0]);

    for(size_t i = 0; i < ext_num; ++i)
    {
        string ext = exts[i];
        string full_name = cv::tempfile(ext.c_str());
        ts->printf(ts->LOG, " full_name : %s\n", full_name.c_str());

        imwrite(full_name, image);

        Mat loaded = imread(full_name);
        if (loaded.empty())
        {
            ts->printf(ts->LOG, "Reading failed at fmt=%s\n", ext.c_str());
            ts->set_failed_test_info(ts->FAIL_MISMATCH);
            continue;
        }

        const double thresDbell = 20;
        double psnr = cvtest::PSNR(loaded, image);
        if (psnr < thresDbell)
        {
            ts->printf(ts->LOG, "Reading image from file: too big difference (=%g) with fmt=%s\n", psnr, ext.c_str());
            ts->set_failed_test_info(ts->FAIL_BAD_ACCURACY);
            continue;
        }

        vector<uchar> from_file;

        FILE *f = fopen(full_name.c_str(), "rb");
        fseek(f, 0, SEEK_END);
        long len = ftell(f);
        from_file.resize((size_t)len);
        fseek(f, 0, SEEK_SET);
        from_file.resize(fread(&from_file[0], 1, from_file.size(), f));
        fclose(f);

        vector<uchar> buf;
        imencode("." + exts[i], image, buf);

        if (buf != from_file)
        {
            ts->printf(ts->LOG, "Encoding failed with fmt=%s\n", ext.c_str());
            ts->set_failed_test_info(ts->FAIL_MISMATCH);
            continue;
        }

        Mat buf_loaded = imdecode(Mat(buf), 1);

        if (buf_loaded.empty())
        {
            ts->printf(ts->LOG, "Decoding failed with fmt=%s\n", ext.c_str());
            ts->set_failed_test_info(ts->FAIL_MISMATCH);
            continue;
        }

        psnr = cvtest::PSNR(buf_loaded, image);

        if (psnr < thresDbell)
        {
            ts->printf(ts->LOG, "Decoding image from memory: too small PSNR (=%gdb) with fmt=%s\n", psnr, ext.c_str());
            ts->set_failed_test_info(ts->FAIL_MISMATCH);
            continue;
        }

    }

    ts->printf(ts->LOG, "end test function : ImagesTest \n");
    ts->set_failed_test_info(ts->OK);
}


void CV_VideoIOTest::VideoTest(const string& dir, const cvtest::VideoFormat& fmt)
{
    string src_file = dir + "../cv/shared/video_for_test.avi";
    string tmp_name = cv::tempfile((cvtest::fourccToString(fmt.fourcc) + "."  + fmt.ext).c_str());

    ts->printf(ts->LOG, "reading video : %s and converting it to %s\n", src_file.c_str(), tmp_name.c_str());

    CvCapture* cap = cvCaptureFromFile(src_file.c_str());

    if (!cap)
    {
        ts->set_failed_test_info(ts->FAIL_MISMATCH);
        return;
    }

    CvVideoWriter* writer = 0;
    vector<Mat> frames;

    for(;;)
    {
        IplImage* img = cvQueryFrame( cap );

        if (!img)
            break;

        frames.push_back(cv::cvarrToMat(img, true));

        if (writer == NULL)
        {
            writer = cvCreateVideoWriter(tmp_name.c_str(), fmt.fourcc, 24, cvGetSize(img));
            if (writer == NULL)
            {
                ts->printf(ts->LOG, "can't create writer (with fourcc : %s)\n",
                           cvtest::fourccToString(fmt.fourcc).c_str());
                cvReleaseCapture( &cap );
                ts->set_failed_test_info(ts->FAIL_MISMATCH);
                return;
            }
        }

        cvWriteFrame(writer, img);
    }

    cvReleaseVideoWriter( &writer );
    cvReleaseCapture( &cap );

    CvCapture *saved = cvCaptureFromFile(tmp_name.c_str());
    if (!saved)
    {
        ts->set_failed_test_info(ts->FAIL_MISMATCH);
        return;
    }

    const double thresDbell = 20;

    for(int i = 0;; i++)
    {
        IplImage* ipl1 = cvQueryFrame( saved );

        if (!ipl1)
            break;

        Mat img = frames[i];
        Mat img1 = cv::cvarrToMat(ipl1);

        double psnr = cvtest::PSNR(img1, img);
        if (psnr < thresDbell)
        {
            ts->printf(ts->LOG, "Too low frame %d psnr = %gdb\n", i, psnr);
            ts->set_failed_test_info(ts->FAIL_MISMATCH);

            //imwrite("original.png", img);
            //imwrite("after_test.png", img1);
            //Mat diff;
            //absdiff(img, img1, diff);
            //imwrite("diff.png", diff);

            break;
        }
    }

    cvReleaseCapture( &saved );

    ts->printf(ts->LOG, "end test function : ImagesVideo \n");
}

void CV_VideoIOTest::SpecificImageTest(const string& dir)
{
    const size_t IMAGE_COUNT = 10;

    for (size_t i = 0; i < IMAGE_COUNT; ++i)
    {
        stringstream s; s << i;
        string file_path = dir+"../python/images/QCIF_0"+s.str()+".bmp";
        Mat image = imread(file_path);

        if (image.empty())
        {
            ts->set_failed_test_info(ts->FAIL_MISSING_TEST_DATA);
            return;
        }

        resize(image, image, Size(968, 757), 0.0, 0.0, INTER_CUBIC);

        stringstream s_digit; s_digit << i;

        string full_name = cv::tempfile((s_digit.str() + ".bmp").c_str());
        ts->printf(ts->LOG, " full_name : %s\n", full_name.c_str());

        imwrite(full_name, image);

        Mat loaded = imread(full_name);
        if (loaded.empty())
        {
            ts->printf(ts->LOG, "Reading failed at fmt=bmp\n");
            ts->set_failed_test_info(ts->FAIL_MISMATCH);
            continue;
        }

        const double thresDbell = 20;
        double psnr = cvtest::PSNR(loaded, image);
        if (psnr < thresDbell)
        {
            ts->printf(ts->LOG, "Reading image from file: too big difference (=%g) with fmt=bmp\n", psnr);
            ts->set_failed_test_info(ts->FAIL_BAD_ACCURACY);
            continue;
        }

        vector<uchar> from_file;

        FILE *f = fopen(full_name.c_str(), "rb");
        fseek(f, 0, SEEK_END);
        long len = ftell(f);
        from_file.resize((size_t)len);
        fseek(f, 0, SEEK_SET);
        from_file.resize(fread(&from_file[0], 1, from_file.size(), f));
        fclose(f);

        vector<uchar> buf;
        imencode(".bmp", image, buf);

        if (buf != from_file)
        {
            ts->printf(ts->LOG, "Encoding failed with fmt=bmp\n");
            ts->set_failed_test_info(ts->FAIL_MISMATCH);
            continue;
        }

        Mat buf_loaded = imdecode(Mat(buf), 1);

        if (buf_loaded.empty())
        {
            ts->printf(ts->LOG, "Decoding failed with fmt=bmp\n");
            ts->set_failed_test_info(ts->FAIL_MISMATCH);
            continue;
        }

        psnr = cvtest::PSNR(buf_loaded, image);

        if (psnr < thresDbell)
        {
            ts->printf(ts->LOG, "Decoding image from memory: too small PSNR (=%gdb) with fmt=bmp\n", psnr);
            ts->set_failed_test_info(ts->FAIL_MISMATCH);
            continue;
        }
    }

    ts->printf(ts->LOG, "end test function : SpecificImageTest \n");
    ts->set_failed_test_info(ts->OK);
}


void CV_VideoIOTest::SpecificVideoTest(const string& dir, const cvtest::VideoFormat& fmt)
{
    string ext = fmt.ext;
    int fourcc = fmt.fourcc;

    string fourcc_str = cvtest::fourccToString(fourcc);
    const string video_file = cv::tempfile((fourcc_str + "." + ext).c_str());

    Size frame_size(968 & -2, 757 & -2);
    VideoWriter writer(video_file, fourcc, 25, frame_size, true);

    if (!writer.isOpened())
    {
        // call it repeatedly for easier debugging
        VideoWriter writer2(video_file, fourcc, 25, frame_size, true);
        ts->printf(ts->LOG, "Creating a video in %s...\n", video_file.c_str());
        ts->printf(ts->LOG, "Cannot create VideoWriter object with codec %s.\n", fourcc_str.c_str());
        ts->set_failed_test_info(ts->FAIL_MISMATCH);
        return;
    }

    const size_t IMAGE_COUNT = 30;
    vector<Mat> images;

    for( size_t i = 0; i < IMAGE_COUNT; ++i )
    {
        string file_path = format("%s../python/images/QCIF_%02d.bmp", dir.c_str(), i);
        Mat img = imread(file_path, IMREAD_COLOR);

        if (img.empty())
        {
            ts->printf(ts->LOG, "Creating a video in %s...\n", video_file.c_str());
            ts->printf(ts->LOG, "Error: cannot read frame from %s.\n", file_path.c_str());
            ts->printf(ts->LOG, "Continue creating the video file...\n");
            ts->set_failed_test_info(ts->FAIL_INVALID_TEST_DATA);
            break;
        }

        for (int k = 0; k < img.rows; ++k)
            for (int l = 0; l < img.cols; ++l)
                if (img.at<Vec3b>(k, l) == Vec3b::all(0))
                    img.at<Vec3b>(k, l) = Vec3b(0, 255, 0);
                else img.at<Vec3b>(k, l) = Vec3b(0, 0, 255);

        resize(img, img, frame_size, 0.0, 0.0, INTER_CUBIC);

        images.push_back(img);
        writer << img;
    }

    writer.release();
    VideoCapture cap(video_file);

    size_t FRAME_COUNT = (size_t)cap.get(CAP_PROP_FRAME_COUNT);

    size_t allowed_extra_frames = 0;

    // Hack! Newer FFmpeg versions in this combination produce a file
    // whose reported duration is one frame longer than needed, and so
    // the calculated frame count is also off by one. Ideally, we'd want
    // to fix both writing (to produce the correct duration) and reading
    // (to correctly report frame count for such files), but I don't know
    // how to do either, so this is a workaround for now.
    // See also the same hack in CV_PositioningTest::run.
    if (fourcc == VideoWriter::fourcc('M', 'P', 'E', 'G') && ext == "mkv")
        allowed_extra_frames = 1;

    // Hack! Some GStreamer encoding pipelines drop last frame in the video
    int allowed_frame_frop = 0;
#ifdef HAVE_GSTREAMER
    allowed_frame_frop = 1;
#endif

    if (FRAME_COUNT < IMAGE_COUNT - allowed_frame_frop || FRAME_COUNT > IMAGE_COUNT + allowed_extra_frames)
    {
        ts->printf(ts->LOG, "\nFrame count checking for video_%s.%s...\n", fourcc_str.c_str(), ext.c_str());
        ts->printf(ts->LOG, "Video codec: %s\n", fourcc_str.c_str());
        if (allowed_extra_frames != 0)
            ts->printf(ts->LOG, "Required frame count: %d-%d; Returned frame count: %d\n",
                       IMAGE_COUNT, IMAGE_COUNT + allowed_extra_frames, FRAME_COUNT);
        else
            ts->printf(ts->LOG, "Required frame count: %d; Returned frame count: %d\n", IMAGE_COUNT, FRAME_COUNT);
        ts->printf(ts->LOG, "Error: Incorrect frame count in the video.\n");
        ts->printf(ts->LOG, "Continue checking...\n");
        ts->set_failed_test_info(ts->FAIL_BAD_ACCURACY);
        return;
    }

    for (int i = 0; (size_t)i < IMAGE_COUNT-allowed_frame_frop; i++)
    {
        Mat frame; cap >> frame;
        if (frame.empty())
        {
            ts->printf(ts->LOG, "\nVideo file directory: %s\n", ".");
            ts->printf(ts->LOG, "File name: video_%s.%s\n", fourcc_str.c_str(), ext.c_str());
            ts->printf(ts->LOG, "Video codec: %s\n", fourcc_str.c_str());
            ts->printf(ts->LOG, "Error: cannot read the next frame with index %d.\n", i+1);
            ts->set_failed_test_info(ts->FAIL_MISSING_TEST_DATA);
            break;
        }

        Mat img = images[i];

        const double thresDbell = 40;
        double psnr = cvtest::PSNR(img, frame);

        if (psnr > thresDbell)
        {
            ts->printf(ts->LOG, "\nReading frame from the file video_%s.%s...\n", fourcc_str.c_str(), ext.c_str());
            ts->printf(ts->LOG, "Frame index: %d\n", i+1);
            ts->printf(ts->LOG, "Difference between saved and original images: %g\n", psnr);
            ts->printf(ts->LOG, "Maximum allowed difference: %g\n", thresDbell);
            ts->printf(ts->LOG, "Error: too big difference between saved and original images.\n");
            break;
        }
    }
}

void CV_ImageTest::run(int)
{
    ImageTest(ts->get_data_path());
}

void CV_SpecificImageTest::run(int)
{
    SpecificImageTest(ts->get_data_path());
}

void CV_VideoTest::run(int)
{
    for (int i = 0; ; ++i)
    {
        const cvtest::VideoFormat& fmt = cvtest::g_specific_fmt_list[i];
        if( fmt.empty() )
            break;
        VideoTest(ts->get_data_path(), fmt);
    }
}

void CV_SpecificVideoTest::run(int)
{
    for (int i = 0; ; ++i)
    {
        const cvtest::VideoFormat& fmt = cvtest::g_specific_fmt_list[i];
        if( fmt.empty() )
            break;
        SpecificVideoTest(ts->get_data_path(), fmt);
    }
}

#ifdef HAVE_JPEG
TEST(Videoio_Image, regression) { CV_ImageTest test; test.safe_run(); }
#endif

#if BUILD_WITH_VIDEO_INPUT_SUPPORT && BUILD_WITH_VIDEO_OUTPUT_SUPPORT && !defined(__APPLE__)
TEST(Videoio_Video, regression) { CV_VideoTest test; test.safe_run(); }
TEST(Videoio_Video, write_read) { CV_SpecificVideoTest test; test.safe_run(); }
#endif

TEST(Videoio_Image, write_read) { CV_SpecificImageTest test; test.safe_run(); }

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