Audio pause and seek better

BUG=39885

Pause for audio is now in effect in less than 200ms.

Seek for audio is also much better as we play also very short amount
after seek.

Review URL: http://codereview.chromium.org/2931014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@52560 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 6 insertions, 4 deletions

diff --git a/media/audio/audio_output_controller.cc b/media/audio/audio_output_controller.cc
index 11ee96c..74e2261 100644
--- a/media/audio/audio_output_controller.cc
+++ b/media/audio/audio_output_controller.cc
@@ -212,9 +212,7 @@ void AudioOutputController::DoPlay() {
   }
 
   // We start the AudioOutputStream lazily.
-  if (old_state == kCreated) {
-    stream_->Start(this);
-  }
+  stream_->Start(this);
 
   // Tell the event handler that we are now playing.
   handler_->OnPlaying(this);
@@ -228,12 +226,16 @@ void AudioOutputController::DoPause() {
     return;
 
   // Sets the |state_| to kPaused so we don't draw more audio data.
-  // TODO(hclam): Actually pause the audio device.
   {
     AutoLock auto_lock(lock_);
     state_ = kPaused;
   }
 
+  // Then we stop the audio device. This is not the perfect solution because
+  // it discards all the internal buffer in the audio device.
+  // TODO(hclam): Actually pause the audio device.
+  stream_->Stop();
+
   handler_->OnPaused(this);
 }