Increase buffer threshold for switch between PCM_LINEAR and PCM_LOW_LATENCY

content/renderer/pepper/pepper_platform_audio_output_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/pepper/pepper_platform_audio_output_impl.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/message_loop_proxy.h"
 #include "build/build_config.h"
@@ skipping 95 matching lines @@
     int sample_rate,
     int frames_per_buffer,
     webkit::ppapi::PluginDelegate::PlatformAudioOutputClient* client) {
   DCHECK(client);
   // Make sure we don't call init more than once.
   DCHECK_EQ(0, stream_id_);
 
   client_ = client;
 
   media::AudioParameters::Format format;
-  const int kMaxFramesForLowLatency = 2048;
+  const int kMaxFramesForLowLatency = 2400;
   // Use the low latency back end if the client request is compatible, and
   // the sample count is low enough to justify using AUDIO_PCM_LOW_LATENCY.
   if (sample_rate == audio_hardware::GetOutputSampleRate() &&
       frames_per_buffer <= kMaxFramesForLowLatency &&
       frames_per_buffer % audio_hardware::GetOutputBufferSize() == 0) {
     format = media::AudioParameters::AUDIO_PCM_LOW_LATENCY;
   } else {
     format = media::AudioParameters::AUDIO_PCM_LINEAR;
   }
 
@@ skipping 30 matching lines @@
 
   filter_->Send(new AudioHostMsg_CloseStream(stream_id_));
   filter_->RemoveDelegate(stream_id_);
   stream_id_ = 0;
 
   Release();  // Release for the delegate, balances out the reference taken in
               // PepperPluginDelegateImpl::CreateAudio.
 }
 
 }  // namespace content