Attempt to fix audio wedges by restarting all streams.

media/audio/audio_output_resampler.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_output_resampler.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 273 matching lines @@
   DCHECK(message_loop_->BelongsToCurrentThread());
 
   // No AudioOutputProxy objects should hold a reference to us when we get
   // to this stage.
   DCHECK(HasOneRef()) << "Only the AudioManager should hold a reference";
 
   dispatcher_->Shutdown();
   DCHECK(callbacks_.empty());
 }
 
+void AudioOutputResampler::CloseStreamsForWedgeFix() {
+  DCHECK(message_loop_->BelongsToCurrentThread());
+
+  // Stop and close all active streams.  Once all streams across all dispatchers
+  // have been closed the AudioManager will call RestartStreamsForWedgeFix().
+  for (CallbackMap::iterator it = callbacks_.begin(); it != callbacks_.end();
+       ++it) {
+    dispatcher_->StopStream(it->first);
+    dispatcher_->CloseStream(it->first);
+  }
+
+  // Close all idle streams as well.
+  dispatcher_->CloseStreamsForWedgeFix();
+}
+
+void AudioOutputResampler::RestartStreamsForWedgeFix() {
+  DCHECK(message_loop_->BelongsToCurrentThread());
+  for (CallbackMap::iterator it = callbacks_.begin(); it != callbacks_.end();
+       ++it) {
+    dispatcher_->OpenStream();
+    dispatcher_->StartStream(it->second, it->first);
+  }
+}
+
 OnMoreDataConverter::OnMoreDataConverter(const AudioParameters& input_params,
                                          const AudioParameters& output_params)
     : io_ratio_(static_cast<double>(input_params.GetBytesPerSecond()) /
                 output_params.GetBytesPerSecond()),
       source_callback_(NULL),
       input_bytes_per_second_(input_params.GetBytesPerSecond()),
       audio_converter_(input_params, output_params, false) {}
 
 OnMoreDataConverter::~OnMoreDataConverter() {
   // Ensure Stop() has been called so we don't end up with an AudioOutputStream
@@ skipping 57 matching lines @@
   if (frames > 0 && frames < dest->frames())
     dest->ZeroFramesPartial(frames, dest->frames() - frames);
   return frames > 0 ? 1 : 0;
 }
 
 void OnMoreDataConverter::OnError(AudioOutputStream* stream) {
   source_callback_->OnError(stream);
 }
 
 }  // namespace media