Add vector_math::FMUL. Replace audio_util::AdjustVolume.

media/audio/mac/audio_low_latency_output_mac.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/mac/audio_low_latency_output_mac.h"
 
 #include <CoreServices/CoreServices.h>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/mac/mac_logging.h"
-#include "media/audio/audio_util.h"
 #include "media/audio/mac/audio_manager_mac.h"
 #include "media/base/media_switches.h"
 
 namespace media {
 
 static std::ostream& operator<<(std::ostream& os,
                                 const AudioStreamBasicDescription& format) {
   os << "sample rate       : " << format.mSampleRate << std::endl
      << "format ID         : " << format.mFormatID << std::endl
      << "format flags      : " << format.mFormatFlags << std::endl
@@ skipping 253 matching lines @@
       memset(audio_data, 0, number_of_frames * format_.mBytesPerFrame);
       return noErr;
     }
 
     frames_filled = source_->OnMoreData(
         audio_bus_.get(), AudioBuffersState(0, hardware_pending_bytes));
   }
 
   // Note: If this ever changes to output raw float the data must be clipped and
   // sanitized since it may come from an untrusted source such as NaCl.
+  audio_bus_->Scale(volume_);
   audio_bus_->ToInterleaved(
       frames_filled, format_.mBitsPerChannel / 8, audio_data);
-  uint32 filled = frames_filled * format_.mBytesPerFrame;
-
-  // Perform in-place, software-volume adjustments.
-  media::AdjustVolume(audio_data,
-                      filled,
-                      audio_bus_->channels(),
-                      format_.mBitsPerChannel / 8,
-                      volume_);
 
   return noErr;
 }
 
 // DefaultOutputUnit callback
 OSStatus AUAudioOutputStream::InputProc(void* user_data,
                                         AudioUnitRenderActionFlags*,
                                         const AudioTimeStamp* output_time_stamp,
                                         UInt32,
                                         UInt32 number_of_frames,
@@ skipping 105 matching lines @@
   if (now_ns > output_time_ns)
     return 0;
 
   double delay_frames = static_cast<double>
       (1e-9 * (output_time_ns - now_ns) * format_.mSampleRate);
 
   return (delay_frames + hardware_latency_frames_);
 }
 
 }  // namespace media