Adds support for CoreAudioUtil::IsChannelLayoutSupported() (II)

media/audio/win/audio_manager_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/audio_io.h"
 
 #include <windows.h>
 #include <objbase.h>  // This has to be before initguid.h
 #include <initguid.h>
 #include <mmsystem.h>
@@ skipping 372 matching lines @@
     // TODO(henrika): Figure out the right thing to do here.
     if (hw_sample_rate && hw_buffer_size) {
       sample_rate = hw_sample_rate;
       buffer_size = hw_buffer_size;
     } else {
       use_input_params = true;
     }
   }
 
   if (input_params.IsValid()) {
+    if (CoreAudioUtil::IsSupported() &&
+        CoreAudioUtil::IsChannelLayoutSupported(eRender, eConsole,
+            input_params.channel_layout())) {
+      // Open up using the same channel layout as the source if it is
+      // supported by the hardware.
+      channel_layout = input_params.channel_layout();
+      VLOG(1) << "Hardware channel layout is not used; using same "
+              << "layout as the source instead (" << channel_layout << ")";
+    }
     input_channels = input_params.input_channels();
     if (use_input_params) {
       // If WASAPI isn't supported we'll fallback to WaveOut, which will take
       // care of resampling and bits per sample changes.  By setting these
       // equal to the input values, AudioOutputResampler will skip resampling
       // and bit per sample differences (since the input parameters will match
       // the output parameters).
       sample_rate = input_params.sample_rate();
       bits_per_sample = input_params.bits_per_sample();
       channel_layout = input_params.channel_layout();
@@ skipping 27 matching lines @@
   return new PCMWaveInAudioInputStream(this, params, kNumInputBuffers,
                                        xp_device_id);
 }
 
 /// static
 AudioManager* CreateAudioManager() {
   return new AudioManagerWin();
 }
 
 }  // namespace media