Show a volume indicator as audio is being recorded.

Per UX input from Cole, this matches the implementation in the android voice actions app.

Changes in this CL:
- Instead of the old mic icon use the recently added mic-volume-empty, mic-volume-full and mask images for the volume indicator.
- Extended the endpointer code to return the audio RMS level (copied from the original source).
- SpeechRecognizer receives the above calculated RMS level and computes a volume level in the [0.0-1.0] range.
- SpeechInputManager receives the above computed volume level and passes it to SpeechInputBubbleController for display, which passes it to SpeechInputBubble.
- SpeechInputBubbleBase creates the appropriate skia bitmap for the volume indicator and passes to the platform specific code for display.
- As part of the above SpeechInputBubbleController addition for volume level, I wrote a single function to process all calls received by it and handled in the UI thread for simplicity.

BUG=53598
TEST=updated existing tests. Also test manually, use speech input and verify the audio level changes appropriately in the UI as mic is moved near and far.

Review URL: http://codereview.chromium.org/3384005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@59638 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 13 insertions, 2 deletions

diff --git a/chrome/browser/speech/speech_input_bubble_views.cc b/chrome/browser/speech/speech_input_bubble_views.cc
index a3dd616..d41c79b 100644
--- a/chrome/browser/speech/speech_input_bubble_views.cc
+++ b/chrome/browser/speech/speech_input_bubble_views.cc
@@ -40,6 +40,7 @@ class ContentView
 
   void UpdateLayout(SpeechInputBubbleBase::DisplayMode mode,
                     const string16& message_text);
+  void SetImage(const SkBitmap& image);
 
   // views::ButtonListener methods.
   virtual void ButtonPressed(views::Button* source, const views::Event& event);
@@ -78,7 +79,7 @@ ContentView::ContentView(SpeechInputBubbleDelegate* delegate)
 
   icon_ = new views::ImageView();
   icon_->SetImage(*ResourceBundle::GetSharedInstance().GetBitmapNamed(
-      IDR_SPEECH_INPUT_RECORDING));
+      IDR_SPEECH_INPUT_MIC_EMPTY));
   icon_->SetHorizontalAlignment(views::ImageView::CENTER);
   AddChildView(icon_);
 
@@ -104,10 +105,14 @@ void ContentView::UpdateLayout(SpeechInputBubbleBase::DisplayMode mode,
   } else {
     icon_->SetImage(*ResourceBundle::GetSharedInstance().GetBitmapNamed(
         (mode == SpeechInputBubbleBase::DISPLAY_MODE_RECORDING) ?
-        IDR_SPEECH_INPUT_RECORDING : IDR_SPEECH_INPUT_PROCESSING));
+        IDR_SPEECH_INPUT_MIC_EMPTY : IDR_SPEECH_INPUT_PROCESSING));
   }
 }
 
+void ContentView::SetImage(const SkBitmap& image) {
+  icon_->SetImage(image);
+}
+
 void ContentView::ButtonPressed(views::Button* source,
                                 const views::Event& event) {
   if (source == cancel_) {
@@ -203,6 +208,7 @@ class SpeechInputBubbleImpl
 
   // SpeechInputBubbleBase methods.
   virtual void UpdateLayout();
+  virtual void SetImage(const SkBitmap& image);
 
   // Returns the screen rectangle to use as the info bubble's target.
   // |element_rect| is the html element's bounds in page coordinates.
@@ -324,6 +330,11 @@ void SpeechInputBubbleImpl::UpdateLayout() {
     info_bubble_->SizeToContents();
 }
 
+void SpeechInputBubbleImpl::SetImage(const SkBitmap& image) {
+  if (bubble_content_)
+    bubble_content_->SetImage(image);
+}
+
 }  // namespace
 
 SpeechInputBubble* SpeechInputBubble::CreateNativeBubble(