1 files changed, 101 insertions, 0 deletions
diff --git a/third_party/libwebrtc/test/pc/e2e/analyzer/video/dvqa/pausable_state.cc b/third_party/libwebrtc/test/pc/e2e/analyzer/video/dvqa/pausable_state.cc
new file mode 100644
index 0000000000..ac191b8d89
--- /dev/null
+++ b/third_party/libwebrtc/test/pc/e2e/analyzer/video/dvqa/pausable_state.cc
@@ -0,0 +1,101 @@
+/*
+ *  Copyright (c) 2023 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 "test/pc/e2e/analyzer/video/dvqa/pausable_state.h"
+
+#include <cstdint>
+
+#include "api/units/time_delta.h"
+#include "api/units/timestamp.h"
+#include "rtc_base/checks.h"
+
+namespace webrtc {
+
+void PausableState::Pause() {
+  if (!IsPaused()) {
+    events_.push_back(Event{.time = clock_->CurrentTime(), .is_paused = true});
+  }
+}
+
+void PausableState::Resume() {
+  if (IsPaused()) {
+    events_.push_back(Event{.time = clock_->CurrentTime(), .is_paused = false});
+  }
+}
+
+bool PausableState::IsPaused() const {
+  return !events_.empty() && events_.back().is_paused;
+}
+
+bool PausableState::WasPausedAt(Timestamp time) const {
+  if (events_.empty()) {
+    return false;
+  }
+
+  int64_t pos = GetPos(time);
+  return pos != -1 && events_[pos].is_paused;
+}
+
+bool PausableState::WasResumedAfter(Timestamp time) const {
+  if (events_.empty()) {
+    return false;
+  }
+
+  int64_t pos = GetPos(time);
+  return (pos + 1 < static_cast<int64_t>(events_.size())) &&
+         !events_[pos + 1].is_paused;
+}
+
+Timestamp PausableState::GetLastEventTime() const {
+  if (events_.empty()) {
+    return Timestamp::PlusInfinity();
+  }
+
+  return events_.back().time;
+}
+
+TimeDelta PausableState::GetActiveDurationFrom(Timestamp time) const {
+  if (events_.empty()) {
+    return clock_->CurrentTime() - time;
+  }
+
+  int64_t pos = GetPos(time);
+  TimeDelta duration = TimeDelta::Zero();
+  for (int64_t i = pos; i < static_cast<int64_t>(events_.size()); ++i) {
+    if (i == -1 || !events_[i].is_paused) {
+      Timestamp start_time = (i == pos) ? time : events_[i].time;
+      Timestamp end_time = (i + 1 == static_cast<int64_t>(events_.size()))
+                               ? clock_->CurrentTime()
+                               : events_[i + 1].time;
+
+      duration += end_time - start_time;
+    }
+  }
+  return duration;
+}
+
+int64_t PausableState::GetPos(Timestamp time) const {
+  int64_t l = 0, r = events_.size() - 1;
+  while (l < r) {
+    int64_t pos = (l + r) / 2;
+    if (time < events_[pos].time) {
+      r = pos;
+    } else if (time >= events_[pos].time) {
+      l = pos + 1;
+    }
+  }
+  if (time < events_[l].time) {
+    return l - 1;
+  } else {
+    return l;
+  }
+}
+
+}  // namespace webrtc