Make default media::Renderer::playback_rate = 0.

BUG=616959

Review-Url: https://codereview.chromium.org/2305113002
Cr-Commit-Position: refs/heads/master@{#416997}

chromecast/media/cma/pipeline/audio_video_pipeline_impl_unittest.cc

@@ -136,6 +136,7 @@ class PipelineHelper {
     eos_[STREAM_VIDEO] = !media_pipeline_.HasVideo();
     base::TimeDelta start_time = base::TimeDelta::FromMilliseconds(0);
     media_pipeline_.StartPlayingFrom(start_time);
+    media_pipeline_.SetPlaybackRate(1.0);
   }
   void SetCdm() { media_pipeline_.SetCdm(cdm_context_.get()); }
   void Flush(const base::Closure& flush_cb) { media_pipeline_.Flush(flush_cb); }

chromecast/media/cma/pipeline/media_pipeline_impl.cc

@@ -83,7 +83,7 @@ struct MediaPipelineImpl::FlushTask {
 MediaPipelineImpl::MediaPipelineImpl()
     : cdm_context_(nullptr),
       backend_state_(BACKEND_STATE_UNINITIALIZED),
-      playback_rate_(1.0f),
+      playback_rate_(0),
       audio_decoder_(nullptr),
       video_decoder_(nullptr),
       pending_time_update_task_(false),

media/base/android/media_source_player.cc

@@ -71,6 +71,7 @@ MediaSourcePlayer::MediaSourcePlayer(
                  weak_factory_.GetWeakPtr())));
 
   demuxer_->Initialize(this);
+  interpolator_.SetPlaybackRate(1.0);
   interpolator_.SetUpperBound(base::TimeDelta());
   weak_this_ = weak_factory_.GetWeakPtr();
 }

media/base/renderer.h

@@ -49,7 +49,7 @@ class MEDIA_EXPORT Renderer {
   // Starts rendering from |time|.
   virtual void StartPlayingFrom(base::TimeDelta time) = 0;
 
-  // Updates the current playback rate. The default playback rate should be 1.
+  // Updates the current playback rate. The default playback rate should be 0.
   virtual void SetPlaybackRate(double playback_rate) = 0;
 
   // Sets the output volume. The default volume should be 1.

media/base/time_delta_interpolator.cc

@@ -18,7 +18,7 @@ TimeDeltaInterpolator::TimeDeltaInterpolator(base::TickClock* tick_clock)
     : tick_clock_(tick_clock),
       interpolating_(false),
       upper_bound_(kNoTimestamp),
-      playback_rate_(1.0) {
+      playback_rate_(0) {
   DCHECK(tick_clock_);
 }
 

media/base/time_delta_interpolator.h

@@ -40,6 +40,7 @@ class MEDIA_EXPORT TimeDeltaInterpolator {
   base::TimeDelta StopInterpolating();
 
   // Sets a new rate at which to interpolate.
+  // The default rate is 0.
   //
   // |tick_clock| will be queried for a new reference time value.
   void SetPlaybackRate(double playback_rate);

media/base/time_delta_interpolator_unittest.cc

@@ -11,7 +11,9 @@ namespace media {
 
 class TimeDeltaInterpolatorTest : public ::testing::Test {
  public:
-  TimeDeltaInterpolatorTest() : interpolator_(&test_tick_clock_) {}
+  TimeDeltaInterpolatorTest() : interpolator_(&test_tick_clock_) {
+    interpolator_.SetPlaybackRate(1.0);
+  }
 
  protected:
   void AdvanceSystemTime(base::TimeDelta delta) {