Adds support for CoreAudioUtil::IsChannelLayoutSupported()

media/audio/win/core_audio_util_win.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.
 
 // Utility methods for the Core Audio API on Windows.
 // Always ensure that Core Audio is supported before using these methods.
 // Use media::CoreAudioIsSupported() for this purpose.
 // Also, all methods must be called on a valid COM thread. This can be done
 // by using the base::win::ScopedCOMInitializer helper class.
 
@@ skipping 99 matching lines @@
   static HRESULT GetDefaultSharedModeMixFormat(EDataFlow data_flow,
                                                ERole role,
                                                WAVEFORMATPCMEX* format);
 
   // Returns true if the specified |client| supports the format in |format|
   // for the given |share_mode| (shared or exclusive).
   static bool IsFormatSupported(IAudioClient* client,
                                 AUDCLNT_SHAREMODE share_mode,
                                 const WAVEFORMATPCMEX* format);
 
+  // Returns true if the specified |channel_layout| is supported for the
+  // default IMMDevice where flow direction and role is define by |data_flow|
+  // and |role|. If this method returns true for a certain channel layout, it
+  // means that SharedModeInitialize() will succeed using a format based on
+  // the preferred format where the channel layout has been modified.
+  static bool IsChannelLayoutSupported(EDataFlow data_flow, ERole role,
+                                       ChannelLayout channel_layout);
+
   // For a shared-mode stream, the audio engine periodically processes the
   // data in the endpoint buffer at the period obtained in |device_period|.
   // For an exclusive mode stream, |device_period| corresponds to the minimum
   // time interval between successive processing by the endpoint device.
   // This period plus the stream latency between the buffer and endpoint device
   // represents the minimum possible latency that an audio application can
   // achieve. The time in |device_period| is expressed in 100-nanosecond units.
   static HRESULT GetDevicePeriod(IAudioClient* client,
                                  AUDCLNT_SHAREMODE share_mode,
                                  REFERENCE_TIME* device_period);
@@ skipping 41 matching lines @@
 
  private:
   CoreAudioUtil() {}
   ~CoreAudioUtil() {}
   DISALLOW_COPY_AND_ASSIGN(CoreAudioUtil);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_WIN_CORE_AUDIO_UTIL_WIN_H_