Tries to avoid crash in media::CoreAudioUtil::CreateDeviceEnumerator

media/audio/win/core_audio_util_win.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/win/core_audio_util_win.h"
 
 #include <audioclient.h>
 #include <devicetopology.h>
 #include <functiondiscoverykeys_devpkey.h>
 
@@ skipping 212 matching lines @@
   DVLOG(2) << ((data_flow == eCapture) ? "[in ] " : "[out] ")
            << "number of devices: " << number_of_active_devices;
   return static_cast<int>(number_of_active_devices);
 }
 
 ScopedComPtr<IMMDeviceEnumerator> CoreAudioUtil::CreateDeviceEnumerator() {
   DCHECK(IsSupported());
   ScopedComPtr<IMMDeviceEnumerator> device_enumerator;
   HRESULT hr = device_enumerator.CreateInstance(__uuidof(MMDeviceEnumerator),
                                                 NULL, CLSCTX_INPROC_SERVER);
+  if (hr == CO_E_NOTINITIALIZED) {
+    LOG(ERROR) << "CoCreateInstance fails with CO_E_NOTINITIALIZED";
+    // We have seen crashes which indicates that this method can in fact
+    // fail with CO_E_NOTINITIALIZED in combination with certain 3rd party
+    // modules. Calling CoInitializeEx is an attempt to resolve the reported
+    // issues. See http://crbug.com/378465 for details.
+    hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
+    if (SUCCEEDED(hr)) {
+      hr = device_enumerator.CreateInstance(__uuidof(MMDeviceEnumerator),
+                                            NULL, CLSCTX_INPROC_SERVER);
+    }
+  }
   CHECK(SUCCEEDED(hr));
   return device_enumerator;
 }
 
 ScopedComPtr<IMMDevice> CoreAudioUtil::CreateDefaultDevice(EDataFlow data_flow,
                                                            ERole role) {
   DCHECK(IsSupported());
   ScopedComPtr<IMMDevice> endpoint_device;
 
   // Create the IMMDeviceEnumerator interface.
@@ skipping 587 matching lines @@
     return false;
 
   // Using the AUDCLNT_BUFFERFLAGS_SILENT flag eliminates the need to
   // explicitly write silence data to the rendering buffer.
   DVLOG(2) << "filling up " << num_frames_to_fill << " frames with silence";
   return SUCCEEDED(render_client->ReleaseBuffer(num_frames_to_fill,
                                                 AUDCLNT_BUFFERFLAGS_SILENT));
 }
 
 }  // namespace media