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295 lines
9.5 KiB
C++
295 lines
9.5 KiB
C++
// This file is part of OpenCV project.
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// It is subject to the license terms in the LICENSE file found in the top-level directory
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// of this distribution and at http://opencv.org/license.html.
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#include "test_precomp.hpp"
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#include "opencv2/core/utils/filesystem.hpp"
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#include "opencv2/imgcodecs.hpp"
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#include "opencv2/videoio/utils.private.hpp"
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using namespace std;
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namespace opencv_test { namespace {
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struct ImageCollection
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{
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string dirname;
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string base;
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string ext;
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size_t first_idx;
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size_t last_idx;
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size_t width;
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public:
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ImageCollection(const char *dirname_template = "opencv_test_images")
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: first_idx(0), last_idx(0), width(0)
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{
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dirname = cv::tempfile(dirname_template);
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cv::utils::fs::createDirectory(dirname);
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}
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~ImageCollection()
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{
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cleanup();
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}
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void cleanup()
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{
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cv::utils::fs::remove_all(dirname);
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}
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void generate(size_t count, size_t first = 0, size_t width_ = 4, const string & base_ = "test", const string & ext_ = "png")
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{
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base = base_;
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ext = ext_;
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first_idx = first;
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last_idx = first + count - 1;
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width = width_;
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for (size_t idx = first_idx; idx <= last_idx; ++idx)
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{
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const string filename = getFilename(idx);
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imwrite(filename, getFrame(idx));
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}
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}
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string getFilename(size_t idx = 0) const
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{
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ostringstream buf;
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buf << dirname << "/" << base << setw(width) << setfill('0') << idx << "." << ext;
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return buf.str();
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}
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string getPatternFilename() const
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{
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ostringstream buf;
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buf << dirname << "/" << base << "%0" << width << "d" << "." << ext;
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return buf.str();
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}
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string getFirstFilename() const
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{
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return getFilename(first_idx);
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}
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Mat getFirstFrame() const
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{
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return getFrame(first_idx);
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}
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size_t getCount() const
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{
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return last_idx - first_idx + 1;
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}
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string getDirname() const
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{
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return dirname;
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}
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static Mat getFrame(size_t idx)
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{
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const int sz = 100; // 100x100 or bigger
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Mat res(sz, sz, CV_8UC3, Scalar::all(0));
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circle(res, Point(idx % 100), idx % 50, Scalar::all(255), 2, LINE_8);
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return res;
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}
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};
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//==================================================================================================
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TEST(videoio_images, basic_read)
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{
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ImageCollection col;
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col.generate(20);
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VideoCapture cap(col.getFirstFilename(), CAP_IMAGES);
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ASSERT_TRUE(cap.isOpened());
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size_t idx = 0;
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while (cap.isOpened()) // TODO: isOpened is always true, even if there are no more images
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{
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Mat img;
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const bool read_res = cap.read(img);
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if (!read_res)
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break;
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EXPECT_MAT_N_DIFF(img, col.getFrame(idx), 0);
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++idx;
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}
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EXPECT_EQ(col.getCount(), idx);
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}
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TEST(videoio_images, basic_write)
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{
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// writer should create files: test0000.png, ... test0019.png
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ImageCollection col;
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col.generate(1);
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VideoWriter wri(col.getFirstFilename(), CAP_IMAGES, 0, 0, col.getFrame(0).size());
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ASSERT_TRUE(wri.isOpened());
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size_t idx = 0;
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while (wri.isOpened())
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{
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wri << col.getFrame(idx);
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Mat actual = imread(col.getFilename(idx));
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EXPECT_MAT_N_DIFF(col.getFrame(idx), actual, 0);
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if (++idx >= 20)
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break;
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}
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wri.release();
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ASSERT_FALSE(wri.isOpened());
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}
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TEST(videoio_images, bad)
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{
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ImageCollection col;
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{
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ostringstream buf; buf << col.getDirname() << "/missing0000.png";
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VideoCapture cap(buf.str(), CAP_IMAGES);
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EXPECT_FALSE(cap.isOpened());
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Mat img;
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EXPECT_FALSE(cap.read(img));
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}
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}
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TEST(videoio_images, seek)
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{
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// check files: test0005.png, ..., test0024.png
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// seek to valid and invalid frame numbers
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// position is zero-based: valid frame numbers are 0, ..., 19
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const int count = 20;
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ImageCollection col;
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col.generate(count, 5);
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VideoCapture cap(col.getFirstFilename(), CAP_IMAGES);
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ASSERT_TRUE(cap.isOpened());
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EXPECT_EQ((size_t)count, (size_t)cap.get(CAP_PROP_FRAME_COUNT));
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vector<int> positions { count / 2, 0, 1, count - 1, count, count + 100, -1, -100 };
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for (const auto &pos : positions)
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{
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Mat img;
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const bool res = cap.set(CAP_PROP_POS_FRAMES, pos);
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if (pos >= count || pos < 0) // invalid position
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{
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// EXPECT_FALSE(res); // TODO: backend clamps invalid value to valid range, actual result is 'true'
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}
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else
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{
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EXPECT_TRUE(res);
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EXPECT_GE(1., cap.get(CAP_PROP_POS_AVI_RATIO));
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EXPECT_NEAR((double)pos / (count - 1), cap.get(CAP_PROP_POS_AVI_RATIO), 1e-2);
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EXPECT_EQ(pos, static_cast<decltype(pos)>(cap.get(CAP_PROP_POS_FRAMES)));
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EXPECT_TRUE(cap.read(img));
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EXPECT_MAT_N_DIFF(img, col.getFrame(col.first_idx + pos), 0);
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}
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}
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}
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TEST(videoio_images, pattern_overflow)
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{
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// check files: test0.png, ..., test11.png
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ImageCollection col;
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col.generate(12, 0, 1);
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{
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VideoCapture cap(col.getFirstFilename(), CAP_IMAGES);
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ASSERT_TRUE(cap.isOpened());
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for (size_t idx = col.first_idx; idx <= col.last_idx; ++idx)
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{
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Mat img;
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EXPECT_TRUE(cap.read(img));
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EXPECT_MAT_N_DIFF(img, col.getFrame(idx), 0);
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}
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}
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{
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VideoCapture cap(col.getPatternFilename(), CAP_IMAGES);
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ASSERT_TRUE(cap.isOpened());
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for (size_t idx = col.first_idx; idx <= col.last_idx; ++idx)
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{
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Mat img;
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EXPECT_TRUE(cap.read(img));
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EXPECT_MAT_N_DIFF(img, col.getFrame(idx), 0);
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}
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}
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}
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TEST(videoio_images, pattern_max)
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{
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// max supported number width for starting image is 9 digits
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// but following images can be read as well
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// test999999999.png ; test1000000000.png
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ImageCollection col;
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col.generate(2, 1000000000 - 1);
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{
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VideoCapture cap(col.getFirstFilename(), CAP_IMAGES);
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ASSERT_TRUE(cap.isOpened());
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Mat img;
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EXPECT_TRUE(cap.read(img));
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EXPECT_MAT_N_DIFF(img, col.getFrame(col.first_idx), 0);
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EXPECT_TRUE(cap.read(img));
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EXPECT_MAT_N_DIFF(img, col.getFrame(col.first_idx + 1), 0);
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}
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{
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VideoWriter wri(col.getFirstFilename(), CAP_IMAGES, 0, 0, col.getFirstFrame().size());
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ASSERT_TRUE(wri.isOpened());
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Mat img = col.getFrame(0);
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wri.write(img);
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wri.write(img);
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Mat actual;
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actual = imread(col.getFilename(col.first_idx));
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EXPECT_MAT_N_DIFF(actual, img, 0);
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actual = imread(col.getFilename(col.first_idx));
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EXPECT_MAT_N_DIFF(actual, img, 0);
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}
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}
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TEST(videoio_images, extract_pattern)
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{
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unsigned offset = 0;
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// Min and max values
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EXPECT_EQ("%01d.png", cv::icvExtractPattern("0.png", &offset));
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EXPECT_EQ(0u, offset);
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EXPECT_EQ("%09d.png", cv::icvExtractPattern("999999999.png", &offset));
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EXPECT_EQ(999999999u, offset);
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// Regular usage - start, end, middle
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EXPECT_EQ("abc%04ddef.png", cv::icvExtractPattern("abc0048def.png", &offset));
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EXPECT_EQ(48u, offset);
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EXPECT_EQ("%05dabcdef.png", cv::icvExtractPattern("00049abcdef.png", &offset));
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EXPECT_EQ(49u, offset);
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EXPECT_EQ("abcdef%06d.png", cv::icvExtractPattern("abcdef000050.png", &offset));
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EXPECT_EQ(50u, offset);
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// Minus handling (should not handle)
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EXPECT_EQ("abcdef-%01d.png", cv::icvExtractPattern("abcdef-8.png", &offset));
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EXPECT_EQ(8u, offset);
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// Two numbers (should select first)
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// TODO: shouldn't it be last number?
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EXPECT_EQ("%01d-abcdef-8.png", cv::icvExtractPattern("7-abcdef-8.png", &offset));
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EXPECT_EQ(7u, offset);
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// Paths (should select filename)
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EXPECT_EQ("images005/abcdef%03d.png", cv::icvExtractPattern("images005/abcdef006.png", &offset));
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EXPECT_EQ(6u, offset);
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// TODO: fix
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// EXPECT_EQ("images03\\abcdef%02d.png", cv::icvExtractPattern("images03\\abcdef04.png", &offset));
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// EXPECT_EQ(4, offset);
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EXPECT_EQ("/home/user/test/0/3348/../../3442/./0/1/3/4/5/14304324234/%01d.png",
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cv::icvExtractPattern("/home/user/test/0/3348/../../3442/./0/1/3/4/5/14304324234/2.png", &offset));
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EXPECT_EQ(2u, offset);
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// Patterns '%0?[0-9][du]'
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EXPECT_EQ("test%d.png", cv::icvExtractPattern("test%d.png", &offset));
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EXPECT_EQ(0u, offset);
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EXPECT_EQ("test%0d.png", cv::icvExtractPattern("test%0d.png", &offset));
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EXPECT_EQ(0u, offset);
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EXPECT_EQ("test%09d.png", cv::icvExtractPattern("test%09d.png", &offset));
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EXPECT_EQ(0u, offset);
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EXPECT_EQ("test%5u.png", cv::icvExtractPattern("test%5u.png", &offset));
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EXPECT_EQ(0u, offset);
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// Invalid arguments
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EXPECT_THROW(cv::icvExtractPattern(string(), &offset), cv::Exception);
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// TODO: fix?
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// EXPECT_EQ(0u, offset);
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EXPECT_THROW(cv::icvExtractPattern("test%010d.png", &offset), cv::Exception);
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EXPECT_EQ(0u, offset);
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EXPECT_THROW(cv::icvExtractPattern("1000000000.png", &offset), cv::Exception);
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EXPECT_EQ(0u, offset);
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EXPECT_THROW(cv::icvExtractPattern("1.png", NULL), cv::Exception);
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}
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// TODO: should writer overwrite files?
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// TODO: is clamping good for seeking?
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// TODO: missing files? E.g. 3, 4, 6, 7, 8 (should it finish OR jump over OR return empty frame?)
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// TODO: non-numbered files (https://github.com/opencv/opencv/pull/23815)
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// TODO: when opening with pattern (e.g. test%01d.png), first frame can be only 0 (test0.png)
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}} // opencv_test::<anonymous>::
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