Use larger buffer sizes for lower power on Linux.

media/filters/audio_renderer_impl.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/filters/audio_renderer_impl.h"
 
 #include <math.h>
 
 #include <algorithm>
 
@@ skipping 260 matching lines @@
         stream->audio_decoder_config().channel_layout(),
         ChannelLayoutToChannelCount(
             stream->audio_decoder_config().channel_layout()),
         0,
         stream->audio_decoder_config().samples_per_second(),
         stream->audio_decoder_config().bits_per_channel(),
         buffer_size);
     buffer_converter_.reset();
   } else {
     // TODO(rileya): Support hardware config changes
-    audio_parameters_ = hardware_config_->GetOutputConfig();
+    const AudioParameters& hw_params = hardware_config_->GetOutputConfig();

[no longer working on chromium, 2014/04/14 08:51:50]

why not add a GetHighLatencyConfigue() method to hardware config?

[DaleCurtis, 2014/04/16 00:39:46]

I wanted it to be clear that this is only adjusting the buffer size and no other
parameters.

+    audio_parameters_.Reset(hw_params.format(),
+                            hw_params.channel_layout(),
+                            hw_params.channels(),
+                            hw_params.input_channels(),
+                            hw_params.sample_rate(),
+                            hw_params.bits_per_sample(),
+                            hardware_config_->GetHighLatencyBufferSize());
   }
 
   audio_buffer_stream_.Initialize(
       stream,
       statistics_cb,
       base::Bind(&AudioRendererImpl::OnAudioBufferStreamInitialized,
                  weak_factory_.GetWeakPtr()));
 }
 
 void AudioRendererImpl::OnAudioBufferStreamInitialized(bool success) {
@@ skipping 454 matching lines @@
   splicer_->SetSpliceTimestamp(splice_timestamp);
 }
 
 void AudioRendererImpl::OnConfigChange() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   DCHECK(expecting_config_changes_);
   buffer_converter_->ResetTimestampState();
 }
 
 }  // namespace media