Framework to display disabled mute button when audio fails....

media/base/pipeline_impl.cc

 // Copyright (c) 2008-2009 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.
 //
 // TODO(scherkus): clean up PipelineImpl... too many crazy function names,
 // potential deadlocks, etc...
 
 #include "base/compiler_specific.h"
 #include "base/condition_variable.h"
 #include "base/stl_util-inl.h"
@@ skipping 670 matching lines @@
   // Transition to ended, executing the callback if present.
   state_ = kEnded;
   if (ended_callback_.get()) {
     ended_callback_->Run();
   }
 }
 
 void PipelineImpl::BroadcastMessageTask(FilterMessage message) {
   DCHECK_EQ(MessageLoop::current(), message_loop_);
 
+  // TODO(kylep): This is a horribly ugly hack, but we have no better way to log
+  // that audio is not and will not be working.

[awong, 2009/08/14 20:33:10]

File a bug about this and put the bug number into the comment.  Place on
MStone:4.

[kylep, 2009/08/14 20:48:02]

Bug filed: http://crbug.com/19384

+  if (message == media::kMsgDisableAudio)
+    rendered_mime_types_.erase(mime_type::kMajorTypeAudio);

[scherkus (not reviewing), 2009/08/14 20:34:44]

is this valid?

I think erase takes an iterator, but I could be wrong... I always forget which
operations take iterator vs. value

[kylep, 2009/08/14 20:48:02]

Yeah, I looked it up. It takes either an iterator or the element you want to
erase.

[scherkus (not reviewing), 2009/08/14 22:28:17]

What if the element doesn't exist?  I have this feeling STL will explode.  Maybe
write a unit test ;)

+
   // Broadcast the message to all filters.
   for (FilterVector::iterator iter = filters_.begin();
        iter != filters_.end();
        ++iter) {
     (*iter)->OnReceivedMessage(message);
   }
 }
 
 void PipelineImpl::FilterStateTransitionTask() {
   DCHECK_EQ(MessageLoop::current(), message_loop_);
@@ skipping 210 matching lines @@
 
   // Reset the pipeline, which will decrement a reference to this object.
   // We will get destroyed as soon as the remaining tasks finish executing.
   // To be safe, we'll set our pipeline reference to NULL.
   filters_.clear();
   filter_types_.clear();
   STLDeleteElements(&filter_threads_);
 }
 
 }  // namespace media