Attempt to fix audio wedges by restarting all streams.

media/audio/audio_manager_base.cc

 // 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.
 
 #include "media/audio/audio_manager_base.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 401 matching lines @@
   const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
   int buffer_size = 0;
   std::string buffer_size_str(cmd_line->GetSwitchValueASCII(
       switches::kAudioBufferSize));
   if (base::StringToInt(buffer_size_str, &buffer_size) && buffer_size > 0)
     return buffer_size;
 
   return 0;
 }
 
+void AudioManagerBase::FixWedgedAudio() {
+  DCHECK(message_loop_->BelongsToCurrentThread());
+  // Close all active streams across all dispatchers.

[scherkus (not reviewing), 2013/12/02 21:49:37]

these two comments aren't very helpful

it'd be more helpful to explain why we need two separate for loops instead of
calling CloseSFWF() and RestartSFWF() back-to-back in the same loop

[DaleCurtis, 2013/12/02 22:52:08]

Done.

+  for (AudioOutputDispatchers::iterator it = output_dispatchers_.begin();
+       it != output_dispatchers_.end(); ++it) {
+    (*it)->dispatcher->CloseStreamsForWedgeFix();
+  }
+  // Recreate all active streams across all dispatchers.
+  for (AudioOutputDispatchers::iterator it = output_dispatchers_.begin();
+       it != output_dispatchers_.end(); ++it) {
+    (*it)->dispatcher->RestartStreamsForWedgeFix();
+  }
+}
+
 }  // namespace media