1 files changed, 90 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/video_coding/utility/framerate_controller_deprecated_unittest.cc b/third_party/libwebrtc/modules/video_coding/utility/framerate_controller_deprecated_unittest.cc
new file mode 100644
index 0000000000..eabf0529db
--- /dev/null
+++ b/third_party/libwebrtc/modules/video_coding/utility/framerate_controller_deprecated_unittest.cc
@@ -0,0 +1,90 @@
+/*
+ *  Copyright (c) 2018 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 "modules/video_coding/utility/framerate_controller_deprecated.h"
+
+#include <stddef.h>
+
+#include "test/gtest.h"
+
+namespace webrtc {
+
+TEST(FramerateControllerDeprecated, KeepTargetFramerate) {
+  const float input_framerate_fps = 20;
+  const float target_framerate_fps = 5;
+  const float max_abs_framerate_error_fps = target_framerate_fps * 0.1f;
+  const size_t input_duration_secs = 3;
+  const size_t num_input_frames = input_duration_secs * input_framerate_fps;
+
+  FramerateControllerDeprecated framerate_controller(target_framerate_fps);
+  size_t num_dropped_frames = 0;
+  for (size_t frame_num = 0; frame_num < num_input_frames; ++frame_num) {
+    const uint32_t timestamp_ms =
+        static_cast<uint32_t>(1000 * frame_num / input_framerate_fps);
+    if (framerate_controller.DropFrame(timestamp_ms)) {
+      ++num_dropped_frames;
+    } else {
+      framerate_controller.AddFrame(timestamp_ms);
+    }
+  }
+
+  const float output_framerate_fps =
+      static_cast<float>(num_input_frames - num_dropped_frames) /
+      input_duration_secs;
+  EXPECT_NEAR(output_framerate_fps, target_framerate_fps,
+              max_abs_framerate_error_fps);
+}
+
+TEST(FramerateControllerDeprecated, DoNotDropAnyFramesIfTargerEqualsInput) {
+  const float input_framerate_fps = 30;
+  const size_t input_duration_secs = 3;
+  const size_t num_input_frames = input_duration_secs * input_framerate_fps;
+
+  FramerateControllerDeprecated framerate_controller(input_framerate_fps);
+  size_t num_dropped_frames = 0;
+  for (size_t frame_num = 0; frame_num < num_input_frames; ++frame_num) {
+    const uint32_t timestamp_ms =
+        static_cast<uint32_t>(1000 * frame_num / input_framerate_fps);
+    if (framerate_controller.DropFrame(timestamp_ms)) {
+      ++num_dropped_frames;
+    } else {
+      framerate_controller.AddFrame(timestamp_ms);
+    }
+  }
+
+  EXPECT_EQ(num_dropped_frames, 0U);
+}
+
+TEST(FramerateControllerDeprecated, DoNotDropFrameWhenTimestampJumpsBackward) {
+  FramerateControllerDeprecated framerate_controller(30);
+  ASSERT_FALSE(framerate_controller.DropFrame(66));
+  framerate_controller.AddFrame(66);
+  EXPECT_FALSE(framerate_controller.DropFrame(33));
+}
+
+TEST(FramerateControllerDeprecated, DropFrameIfItIsTooCloseToPreviousFrame) {
+  FramerateControllerDeprecated framerate_controller(30);
+  ASSERT_FALSE(framerate_controller.DropFrame(33));
+  framerate_controller.AddFrame(33);
+  EXPECT_TRUE(framerate_controller.DropFrame(34));
+}
+
+TEST(FramerateControllerDeprecated, FrameDroppingStartsFromSecondInputFrame) {
+  const float input_framerate_fps = 23;
+  const float target_framerate_fps = 19;
+  const uint32_t input_frame_duration_ms =
+      static_cast<uint32_t>(1000 / input_framerate_fps);
+  FramerateControllerDeprecated framerate_controller(target_framerate_fps);
+  ASSERT_FALSE(framerate_controller.DropFrame(1 * input_frame_duration_ms));
+  framerate_controller.AddFrame(1 * input_frame_duration_ms);
+  EXPECT_TRUE(framerate_controller.DropFrame(2 * input_frame_duration_ms));
+}
+
+}  // namespace webrtc