Browser-wide audio mirroring for TabCapture API

content/browser/renderer_host/media/web_contents_capture_util.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_MEDIA_WEB_CONTENTS_CAPTURE_UTIL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_WEB_CONTENTS_CAPTURE_UTIL_H_
 
 #include <string>
 
 namespace content {
 
 class WebContentsCaptureUtil {
  public:
+  // Returns a new id after appending the device id scheme for virtual streams.
+  static std::string AppendWebContentsDeviceScheme(

[Alpha Left Google, 2012/11/28 01:04:47]

These ID manipulation really feels like a hack as we have different ways to
select device type etc, can you file a bug so we can clean this up?
 

[justinlin, 2012/11/28 14:30:31]

Yup, filed http://crbug.com/163100.
We should eventually do the same for video using StreamOptions, but right now
the plumbing really tricky (but I think a refactoring is coming up) and also the
device is only created after the peer connection is established.

+      const std::string& device_id_param);
+
+  static std::string StripWebContentsDeviceScheme(
+      const std::string& device_id_param);
+
+  // Check whether the device id indicates that this is a web contents stream.
+  static bool IsWebContentsDeviceId(const std::string& device_id);
+
   // Function to extract the target renderer id's from a tab media stream
   // request's device id.
   static bool ExtractTabCaptureTarget(const std::string& device_id,
                                       int* render_process_id,
                                       int* render_view_id);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_WEB_CONTENTS_CAPTURE_UTIL_H_