Extract media::Clock::IsPlaying() into media::Pipeline::ClockState enum.

media/base/clock.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/base/clock.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/time/tick_clock.h"
 #include "media/base/buffers.h"
 
 namespace media {
 
-Clock::Clock(base::TickClock* clock) : clock_(clock) {
+Clock::Clock(base::TickClock* clock)
+    : clock_(clock),
+      playing_(false),
+      underflow_(false),
+      playback_rate_(1.0f),
+      max_time_(kNoTimestamp()),
+      duration_(kNoTimestamp()) {
   DCHECK(clock_);
-  Reset();
 }
 
 Clock::~Clock() {}
 
 bool Clock::IsPlaying() const {
   return playing_;
 }
 
 base::TimeDelta Clock::Play() {
   DCHECK(!playing_);
@@ skipping 68 matching lines @@
   now_us = static_cast<int64>(now_us * playback_rate_);
   return media_time_ + base::TimeDelta::FromMicroseconds(now_us);
 }
 
 base::TimeDelta Clock::ClampToValidTimeRange(base::TimeDelta time) const {
   if (duration_ == kNoTimestamp())
     return base::TimeDelta();
   return std::max(std::min(time, duration_), base::TimeDelta());
 }
 
-void Clock::EndOfStream() {
-  Pause();
-  SetTime(Duration(), Duration());
-}
-
 base::TimeDelta Clock::Duration() const {
   if (duration_ == kNoTimestamp())
     return base::TimeDelta();
   return duration_;
 }
 
 void Clock::UpdateReferencePoints() {
   UpdateReferencePoints(Elapsed());
 }
 
 void Clock::UpdateReferencePoints(base::TimeDelta current_time) {
   media_time_ = ClampToValidTimeRange(current_time);
   reference_ = clock_->NowTicks();
 }
 
 base::TimeDelta Clock::EstimatedElapsedTime() {
   return ClampToValidTimeRange(ElapsedViaProvidedTime(clock_->NowTicks()));
 }
 
-void Clock::Reset() {
-  playing_ = false;
-  playback_rate_ = 1.0f;
-  max_time_ = kNoTimestamp();
-  duration_ = kNoTimestamp();
-  media_time_ = base::TimeDelta();
-  reference_ = base::TimeTicks();
-  underflow_ = false;
-}
-
 }  // namespace media