bug 1161276 - part 1 add bits-per-second interface to MediaRecorder r=roc,smaug

dom/media/MediaRecorder.cpp

@@ -965,7 +965,7 @@ MediaRecorder::Constructor(const GlobalObject& aGlobal,
   }
 
   nsRefPtr<MediaRecorder> object = new MediaRecorder(aStream, ownerWindow);
-  object->SetMimeType(aInitDict.mMimeType);
+  object->SetOptions(aInitDict);
   return object.forget();
 }
 
@@ -1001,10 +1001,22 @@ MediaRecorder::Constructor(const GlobalObject& aGlobal,
   nsRefPtr<MediaRecorder> object = new MediaRecorder(aSrcAudioNode,
                                                      aSrcOutput,
                                                      ownerWindow);
-  object->SetMimeType(aInitDict.mMimeType);
+  object->SetOptions(aInitDict);
   return object.forget();
 }
 
+void
+MediaRecorder::SetOptions(const MediaRecorderOptions& aInitDict)
+{
+  SetMimeType(aInitDict.mMimeType);
+  mAudioBitsPerSecond = aInitDict.mAudioBitsPerSecond.WasPassed() ?
+                        aInitDict.mAudioBitsPerSecond.Value() : 0;
+  mVideoBitsPerSecond = aInitDict.mVideoBitsPerSecond.WasPassed() ?
+                        aInitDict.mVideoBitsPerSecond.Value() : 0;
+  mBitsPerSecond = aInitDict.mBitsPerSecond.WasPassed() ?
+                   aInitDict.mBitsPerSecond.Value() : 0;
+}
+
 nsresult
 MediaRecorder::CreateAndDispatchBlobEvent(already_AddRefed<nsIDOMBlob>&& aBlob)
 {

dom/media/MediaRecorder.h

@@ -118,6 +118,7 @@ protected:
   bool CheckPrincipal();
   // Set encoded MIME type.
   void SetMimeType(const nsString &aMimeType);
+  void SetOptions(const MediaRecorderOptions& aInitDict);
 
   MediaRecorder(const MediaRecorder& x) = delete; // prevent bad usage
   // Remove session pointer.
@@ -144,6 +145,9 @@ protected:
   // It specifies the container format as well as the audio and video capture formats.
   nsString mMimeType;
 
+  uint32_t mAudioBitsPerSecond;
+  uint32_t mVideoBitsPerSecond;
+  uint32_t mBitsPerSecond;
 private:
   // Register MediaRecorder into Document to listen the activity changes.
   void RegisterActivityObserver();

dom/webidl/MediaRecorder.webidl

@@ -51,4 +51,7 @@ interface MediaRecorder : EventTarget {
 
 dictionary MediaRecorderOptions {
   DOMString mimeType = ""; // Default encoding mimeType.
+  unsigned long audioBitsPerSecond;
+  unsigned long videoBitsPerSecond;
+  unsigned long bitsPerSecond;
 };