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/*
* 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