add support for CAP_PROP_ORIENTATION_AUTO to AVFoundation backend

* extract rotateFrame as free function, rename to applyMetadataRotation * LegacyCapture::get() always return 0, if cap is null
2026-07-30 07:43:03 +04:00 · 2022-11-10 18:08:59 +01:00
parent 2aad039b4f
commit a462f49b99
8 changed files with 167 additions and 92 deletions
@@ -0,0 +1,76 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
+#include "test_precomp.hpp"
+
+using namespace std;
+
+namespace opencv_test { namespace {
+
+typedef TestWithParam<cv::VideoCaptureAPIs> VideoCaptureAPITests;
+
+// related issue: https://github.com/opencv/opencv/issues/15499
+TEST_P(VideoCaptureAPITests, mp4_orientation_meta_auto)
+{
+    cv::VideoCaptureAPIs api = GetParam();
+    if (!videoio_registry::hasBackend(api))
+        throw SkipTestException("backend " + std::to_string(int(api)) + " was not found");
+
+    string video_file = string(cvtest::TS::ptr()->get_data_path()) + "video/rotated_metadata.mp4";
+
+    VideoCapture cap;
+    EXPECT_NO_THROW(cap.open(video_file, api));
+    ASSERT_TRUE(cap.isOpened()) << "Can't open the video: " << video_file << " with backend " << api << std::endl;
+
+    // related issue: https://github.com/opencv/opencv/issues/22088
+    EXPECT_EQ(90, cap.get(CAP_PROP_ORIENTATION_META));
+
+    EXPECT_TRUE(cap.set(CAP_PROP_ORIENTATION_AUTO, true));
+
+    Size actual;
+    EXPECT_NO_THROW(actual = Size((int)cap.get(CAP_PROP_FRAME_WIDTH),
+                                    (int)cap.get(CAP_PROP_FRAME_HEIGHT)));
+    EXPECT_EQ(270, actual.width);
+    EXPECT_EQ(480, actual.height);
+
+    Mat frame;
+
+    cap >> frame;
+
+    ASSERT_EQ(270, frame.cols);
+    ASSERT_EQ(480, frame.rows);
+}
+
+// related issue: https://github.com/opencv/opencv/issues/15499
+TEST_P(VideoCaptureAPITests, mp4_orientation_no_rotation)
+{
+    cv::VideoCaptureAPIs api = GetParam();
+    if (!videoio_registry::hasBackend(api))
+        throw SkipTestException("backend " + std::to_string(int(api)) + " was not found");
+
+    string video_file = string(cvtest::TS::ptr()->get_data_path()) + "video/rotated_metadata.mp4";
+
+    VideoCapture cap;
+    EXPECT_NO_THROW(cap.open(video_file, api));
+    cap.set(CAP_PROP_ORIENTATION_AUTO, 0);
+    ASSERT_TRUE(cap.isOpened()) << "Can't open the video: " << video_file << " with backend " << api << std::endl;
+    ASSERT_FALSE(cap.get(CAP_PROP_ORIENTATION_AUTO));
+
+    Size actual;
+    EXPECT_NO_THROW(actual = Size((int)cap.get(CAP_PROP_FRAME_WIDTH),
+                                    (int)cap.get(CAP_PROP_FRAME_HEIGHT)));
+    EXPECT_EQ(480, actual.width);
+    EXPECT_EQ(270, actual.height);
+
+    Mat frame;
+
+    cap >> frame;
+
+    ASSERT_EQ(480, frame.cols);
+    ASSERT_EQ(270, frame.rows);
+}
+
+INSTANTIATE_TEST_CASE_P(videoio, VideoCaptureAPITests, testing::Values(CAP_FFMPEG, CAP_AVFOUNDATION));
+
+}} // namespace