Allow AudioOutputDevice objects to be initialized with a specific hardware output device and store …

media/base/output_device.h

Index: media/base/output_device.h
diff --git a/media/base/output_device.h b/media/base/output_device.h
index c5ac7917746feeeb2833344274f33ba028b7950c..719e8e371cb4af862de92d77e6187e89571f1592 100644
--- a/media/base/output_device.h
+++ b/media/base/output_device.h
@@ -19,10 +19,8 @@ enum SwitchOutputDeviceResult {
   SWITCH_OUTPUT_DEVICE_RESULT_SUCCESS = 0,
   SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_FOUND,
   SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_AUTHORIZED,
-  SWITCH_OUTPUT_DEVICE_RESULT_ERROR_OBSOLETE,
-  SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_SUPPORTED,
-  SWITCH_OUTPUT_DEVICE_RESULT_LAST =
-      SWITCH_OUTPUT_DEVICE_RESULT_ERROR_NOT_SUPPORTED,
+  SWITCH_OUTPUT_DEVICE_RESULT_ERROR_INTERNAL,
+  SWITCH_OUTPUT_DEVICE_RESULT_LAST = SWITCH_OUTPUT_DEVICE_RESULT_ERROR_INTERNAL,
 };
 
 typedef base::Callback<void(SwitchOutputDeviceResult)> SwitchOutputDeviceCB;
@@ -47,6 +45,11 @@ class OutputDevice {
                                   const GURL& security_origin,
                                   const SwitchOutputDeviceCB& callback) = 0;
 
+  // Returns the device's audio output parameters.
+  // If the parameters are not available, this method blocks until they
+  // become available. Must never be called on the IO thread.
+  virtual AudioParameters GetOutputParameters() = 0;
+
  protected:
   virtual ~OutputDevice() {}
 };