Split out counting unique rtp timestamps from packet_buffer
Bug: None
Change-Id: Ia6fd05f284e8304cf56ab9ddf944fb222a4c9573
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158676
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29656}
diff --git a/modules/video_coding/unique_timestamp_counter_unittest.cc b/modules/video_coding/unique_timestamp_counter_unittest.cc
new file mode 100644
index 0000000..16cf237
--- /dev/null
+++ b/modules/video_coding/unique_timestamp_counter_unittest.cc
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2019 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/unique_timestamp_counter.h"
+
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace {
+
+TEST(UniqueTimestampCounterTest, InitiallyZero) {
+ UniqueTimestampCounter counter;
+ EXPECT_EQ(counter.GetUniqueSeen(), 0);
+}
+
+TEST(UniqueTimestampCounterTest, CountsUniqueValues) {
+ UniqueTimestampCounter counter;
+ counter.Add(100);
+ counter.Add(100);
+ counter.Add(200);
+ counter.Add(150);
+ counter.Add(100);
+ EXPECT_EQ(counter.GetUniqueSeen(), 3);
+}
+
+TEST(UniqueTimestampCounterTest, ForgetsOldValuesAfter1000NewValues) {
+ const int kNumValues = 1500;
+ const int kMaxHistory = 1000;
+ const uint32_t value = 0xFFFFFFF0;
+ UniqueTimestampCounter counter;
+ for (int i = 0; i < kNumValues; ++i) {
+ counter.Add(value + 10 * i);
+ }
+ ASSERT_EQ(counter.GetUniqueSeen(), kNumValues);
+ // Slightly old values not affect number of seen unique values.
+ for (int i = kNumValues - kMaxHistory; i < kNumValues; ++i) {
+ counter.Add(value + 10 * i);
+ }
+ EXPECT_EQ(counter.GetUniqueSeen(), kNumValues);
+ // Very old value will be treated as unique.
+ counter.Add(value);
+ EXPECT_EQ(counter.GetUniqueSeen(), kNumValues + 1);
+}
+
+} // namespace
+} // namespace webrtc