Upgrade AudioBus to support wrapping, interleaving.

media/audio/audio_util.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.
 
 // Software adjust volume of samples, allows each audio stream its own
 // volume without impacting master volume for chrome and other applications.
 
 // Implemented as templates to allow 8, 16 and 32 bit implementations.
 // 8 bit is unsigned and biased by 128.
 
@@ skipping 164 matching lines @@
           reinterpret_cast<int32*>(buf),
           sample_count,
           volume,
           channels);
       return true;
     }
   }
   return false;
 }
 
+// TODO(dalecurtis): Delete once everywhere is using the AudioBus version.
 bool DeinterleaveAudioChannel(void* source,
                               float* destination,
                               int channels,
                               int channel_index,
                               int bytes_per_sample,
                               size_t number_of_frames) {
   switch (bytes_per_sample) {
     case 1:
     {
       uint8* source8 = reinterpret_cast<uint8*>(source) + channel_index;
@@ skipping 57 matching lines @@
       if (sample > max_value)
         sample = max_value;
       else if (sample < min_value)
         sample = min_value;
 
       destination[j * channels + i] = static_cast<Format>(sample) + bias;
     }
   }
 }
 
+// TODO(dalecurtis): Delete once everywhere is using the AudioBus version.
 void InterleaveFloatToInt(const AudioBus* source, void* dst,
                           size_t number_of_frames, int bytes_per_sample) {
   switch (bytes_per_sample) {
     case 1:
       InterleaveFloatToInt<uint8, int32>(source, dst, number_of_frames);
       break;
     case 2:
       InterleaveFloatToInt<int16, int32>(source, dst, number_of_frames);
       break;
     case 4:
@@ skipping 275 matching lines @@
   //    out performance was degraded compared to XP.
   //  - The regression was fixed in Windows 7 and most configurations will work
   //    with 2, but some (e.g., some Sound Blasters) still need 3.
   //  - Some XP configurations (even multi-processor ones) also need 3.
   return (base::win::GetVersion() == base::win::VERSION_VISTA) ? 4 : 3;
 }
 
 #endif
 
 }  // namespace media