Setting audio volume is no longer ignored on low latency audio path for Mac.

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"
@@ skipping 268 matching lines @@
 
   int 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_->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_);
+
   // Handle channel order for 5.1 audio.
   // TODO(dalecurtis): Channel downmixing, upmixing, should be done in mixer;
   // volume adjust should use SSE optimized vector_fmul() prior to interleave.
   if (format_.mChannelsPerFrame == 6) {
     if (format_.mBitsPerChannel == 8) {
       SwizzleCoreAudioLayout5_1(reinterpret_cast<uint8*>(audio_data), filled);
     } else if (format_.mBitsPerChannel == 16) {
       SwizzleCoreAudioLayout5_1(reinterpret_cast<int16*>(audio_data), filled);
     } else if (format_.mBitsPerChannel == 32) {
       SwizzleCoreAudioLayout5_1(reinterpret_cast<int32*>(audio_data), filled);
@@ skipping 117 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