Proof of concept using libvpx's y4minput.c

webrtc/tools/frame_analyzer/reference_less_video_analysis_unittest.cc

+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+#include <string.h>
+#include <stdio.h>
+#include <cstring>
+#include <iostream>
+#include <vector>
+
+#include "webrtc/test/gtest.h"
+#include "webrtc/test/testsupport/fileutils.h"
+#include "webrtc/tools/frame_analyzer/reference_less_video_analysis_lib.h"
+
+class ReferenceLessVideoAnalysisTest : public ::testing::Test {
+ public:
+  void SetUp() override {
+    video_file =
+           webrtc::test::ResourcePath("reference_less_video_test_file", "y4m");
+    compute_metrics(video_file, &psnr_per_frame, &ssim_per_frame);
+  }
+  std::string video_file;
+  std::vector<double> psnr_per_frame;
+  std::vector<double> ssim_per_frame;
+};
+
+TEST_F(ReferenceLessVideoAnalysisTest, MatchComputedMetrics) {
+  EXPECT_EQ(74, (int)psnr_per_frame.size());
+
+  ASSERT_NEAR(27.2f, psnr_per_frame[1], 0.1f);
+  ASSERT_NEAR(24.9f, psnr_per_frame[5], 0.1f);
+
+  ASSERT_NEAR(0.9f, ssim_per_frame[1], 0.1f);
+  ASSERT_NEAR(0.9f, ssim_per_frame[5], 0.1f);
+}
+
+TEST_F(ReferenceLessVideoAnalysisTest, MatchHeightWidthFps) {
+  int height = 0, width = 0, fps = 0;
+  get_height_width_fps(&height, &width, &fps, video_file.c_str());
+  EXPECT_EQ(height, 720);
+  EXPECT_EQ(width, 1280);
+  EXPECT_EQ(fps, 25);
+}
+
+TEST_F(ReferenceLessVideoAnalysisTest, MatchIdenticalFrameClusters) {
+  std::vector<int> identical_frame_clusters =
+      find_frame_clusters(psnr_per_frame, ssim_per_frame);
+  EXPECT_EQ(5, (int)identical_frame_clusters.size());
+  EXPECT_EQ(1, identical_frame_clusters[0]);
+  EXPECT_EQ(1, identical_frame_clusters[4]);
+}
+
+TEST_F(ReferenceLessVideoAnalysisTest, CheckFileExtension) {
+  EXPECT_TRUE(check_file_extension(video_file));
+}
+
+
+
+