Added tool for reference less video analysis

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"
+
+std::vector<double> psnr_per_frame;
+std::vector<double> ssim_per_frame;
+std::string video_file =
+           webrtc::test::ResourcePath("reference_less_video_test_file", "y4m");

[kjellander_webrtc, 2016/11/28 15:02:08]

Please add tests for an invalid test file as well, to get coverage for the error
handling code.

+char video_file_name[200];
+
+TEST(ReferenceLessVideoAnalysisTest, MatchComputedMetrics) {
+  strcpy(video_file_name, video_file.c_str());
+  compute_metrics(video_file_name, &psnr_per_frame, &ssim_per_frame);
+
+  EXPECT_EQ(74, (int)psnr_per_frame.size());
+
+  EXPECT_FLOAT_EQ(27.2268, psnr_per_frame[1]);
+  EXPECT_FLOAT_EQ(24.980579, psnr_per_frame[5]);
+
+  EXPECT_FLOAT_EQ(0.983759, ssim_per_frame[1]);
+  EXPECT_FLOAT_EQ(0.979621, ssim_per_frame[5]);
+}
+
+TEST(ReferenceLessVideoAnalysisTest, MatchHeightWidthFps) {
+  int height = 0, width = 0, fps = 0;
+  strcpy(video_file_name, video_file.c_str());
+  get_height_width_fps(&height, &width, &fps, video_file_name);
+  EXPECT_EQ(height, 720);
+  EXPECT_EQ(width, 1280);
+  EXPECT_EQ(fps, 25);
+}
+
+TEST(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]);
+}
+
+

[kjellander_webrtc, 2016/11/28 15:02:08]

Remove blank lines.

+
+
+