Clean up audio-related utility functions to compute buffer sizes

content/renderer/media/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 "content/renderer/media/audio_renderer_impl.h"
 
 #include <math.h>
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "content/common/child_process.h"
 #include "content/common/media/audio_messages.h"
+#include "content/renderer/media/audio_hardware.h"
 #include "content/renderer/render_thread_impl.h"
 #include "media/audio/audio_buffers_state.h"
 #include "media/audio/audio_util.h"
 #include "media/base/filter_host.h"
 
 AudioRendererImpl::AudioRendererImpl(media::AudioRendererSink* sink)
     : AudioRendererBase(),
       bytes_per_second_(0),
       stopped_(false),
       sink_(sink),
@@ skipping 40 matching lines @@
                                       sample_rate,
                                       bits_per_channel,
                                       0);
 
   bytes_per_second_ = audio_parameters_.GetBytesPerSecond();
 
   DCHECK(sink_.get());
 
   if (!is_initialized_) {
     sink_->Initialize(
-        media::SelectSamplesPerPacket(sample_rate),
+        audio_hardware::GetHighLatencyOutputBufferSize(sample_rate),
         audio_parameters_.channels,
         audio_parameters_.sample_rate,
         audio_parameters_.format,
         this);
 
     sink_->Start();
     is_initialized_ = true;
     return true;
   }
 
@@ skipping 142 matching lines @@
 
 void AudioRendererImpl::OnRenderError() {
   host()->DisableAudioRenderer();
 }
 
 void AudioRendererImpl::OnRenderEndOfStream() {
   // TODO(enal): schedule callback instead of polling.
   if (base::Time::Now() >= earliest_end_time_)
     SignalEndOfStream();
 }