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diff --git a/media/libvpx/libvpx/test/timestamp_test.cc b/media/libvpx/libvpx/test/timestamp_test.cc
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+/*
+ * Copyright (c) 2019 The WebM 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 "test/codec_factory.h"
+#include "test/encode_test_driver.h"
+#include "test/util.h"
+#include "test/video_source.h"
+#include "third_party/googletest/src/include/gtest/gtest.h"
+
+namespace {
+
+const int kVideoSourceWidth = 320;
+const int kVideoSourceHeight = 240;
+const int kFramesToEncode = 3;
+
+// A video source that exposes functions to set the timebase, framerate and
+// starting pts.
+class DummyTimebaseVideoSource : public ::libvpx_test::DummyVideoSource {
+ public:
+ // Parameters num and den set the timebase for the video source.
+ DummyTimebaseVideoSource(int num, int den)
+ : timebase_({ num, den }), framerate_numerator_(30),
+ framerate_denominator_(1), starting_pts_(0) {
+ SetSize(kVideoSourceWidth, kVideoSourceHeight);
+ set_limit(kFramesToEncode);
+ }
+
+ void SetFramerate(int numerator, int denominator) {
+ framerate_numerator_ = numerator;
+ framerate_denominator_ = denominator;
+ }
+
+ // Returns one frames duration in timebase units as a double.
+ double FrameDuration() const {
+ return (static_cast<double>(timebase_.den) / timebase_.num) /
+ (static_cast<double>(framerate_numerator_) / framerate_denominator_);
+ }
+
+ virtual vpx_codec_pts_t pts() const {
+ return static_cast<vpx_codec_pts_t>(frame_ * FrameDuration() +
+ starting_pts_ + 0.5);
+ }
+
+ virtual unsigned long duration() const {
+ return static_cast<unsigned long>(FrameDuration() + 0.5);
+ }
+
+ virtual vpx_rational_t timebase() const { return timebase_; }
+
+ void set_starting_pts(int64_t starting_pts) { starting_pts_ = starting_pts; }
+
+ private:
+ vpx_rational_t timebase_;
+ int framerate_numerator_;
+ int framerate_denominator_;
+ int64_t starting_pts_;
+};
+
+class TimestampTest
+ : public ::libvpx_test::EncoderTest,
+ public ::libvpx_test::CodecTestWithParam<libvpx_test::TestMode> {
+ protected:
+ TimestampTest() : EncoderTest(GET_PARAM(0)) {}
+ virtual ~TimestampTest() {}
+
+ virtual void SetUp() {
+ InitializeConfig();
+ SetMode(GET_PARAM(1));
+ }
+};
+
+// Tests encoding in millisecond timebase.
+TEST_P(TimestampTest, EncodeFrames) {
+ DummyTimebaseVideoSource video(1, 1000);
+ ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
+}
+
+TEST_P(TimestampTest, TestMicrosecondTimebase) {
+ // Set the timebase to microseconds.
+ DummyTimebaseVideoSource video(1, 1000000);
+ video.set_limit(1);
+ ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
+}
+
+TEST_P(TimestampTest, TestVpxRollover) {
+ DummyTimebaseVideoSource video(1, 1000);
+ video.set_starting_pts(922337170351ll);
+ ASSERT_NO_FATAL_FAILURE(RunLoop(&video));
+}
+
+VP8_INSTANTIATE_TEST_SUITE(TimestampTest,
+ ::testing::Values(::libvpx_test::kTwoPassGood));
+VP9_INSTANTIATE_TEST_SUITE(TimestampTest,
+ ::testing::Values(::libvpx_test::kTwoPassGood));
+} // namespace