Remove "high"-latency audio code path

media/filters/reference_audio_renderer.cc

Index: media/filters/reference_audio_renderer.cc
diff --git a/media/filters/reference_audio_renderer.cc b/media/filters/reference_audio_renderer.cc
deleted file mode 100644
index 558fcda7bb470b8452b7488a531c1bb534e023a7..0000000000000000000000000000000000000000
--- a/media/filters/reference_audio_renderer.cc
+++ /dev/null
@@ -1,110 +0,0 @@
-// 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/reference_audio_renderer.h"
-
-#include <math.h>
-
-#include "base/bind.h"
-#include "base/synchronization/waitable_event.h"
-
-namespace media {
-
-ReferenceAudioRenderer::ReferenceAudioRenderer(AudioManager* audio_manager)
-    : AudioRendererBase(),
-      audio_manager_(audio_manager),
-      bytes_per_second_(0),
-      has_buffered_data_(true),
-      buffer_capacity_(0) {
-}
-
-ReferenceAudioRenderer::~ReferenceAudioRenderer() {
-  // Close down the audio device.
-  if (controller_) {
-      base::WaitableEvent closed_event(true, false);
-      controller_->Close(base::Bind(&base::WaitableEvent::Signal,
-                                    base::Unretained(&closed_event)));
-      closed_event.Wait();
-  }
-}
-
-void ReferenceAudioRenderer::SetPlaybackRate(float rate) {
-  // TODO(fbarchard): limit rate to reasonable values
-  AudioRendererBase::SetPlaybackRate(rate);
-
-  if (controller_ && rate > 0.0f)
-    controller_->Play();
-}
-
-void ReferenceAudioRenderer::SetVolume(float volume) {
-  if (controller_)
-    controller_->SetVolume(volume);
-}
-
-void ReferenceAudioRenderer::OnCreated(AudioOutputController* controller) {
-  NOTIMPLEMENTED();
-}
-
-void ReferenceAudioRenderer::OnPlaying(AudioOutputController* controller) {
-  NOTIMPLEMENTED();
-}
-
-void ReferenceAudioRenderer::OnPaused(AudioOutputController* controller) {
-  NOTIMPLEMENTED();
-}
-
-void ReferenceAudioRenderer::OnError(AudioOutputController* controller,
-                                     int error_code) {
-  NOTIMPLEMENTED();
-}
-
-void ReferenceAudioRenderer::OnMoreData(AudioOutputController* controller,
-                                        AudioBuffersState buffers_state) {
-  // TODO(fbarchard): Waveout_output_win.h should handle zero length buffers
-  //                  without clicking.
-  uint32 pending_bytes = static_cast<uint32>(ceil(buffers_state.total_bytes() *
-                                                  GetPlaybackRate()));
-  base::TimeDelta delay = base::TimeDelta::FromMicroseconds(
-      base::Time::kMicrosecondsPerSecond * pending_bytes /
-      bytes_per_second_);
-  has_buffered_data_ = buffers_state.pending_bytes != 0;
-  uint32 read = FillBuffer(buffer_.get(), buffer_capacity_, delay);
-  controller->EnqueueData(buffer_.get(), read);
-}
-
-void ReferenceAudioRenderer::OnRenderEndOfStream() {
-  // We cannot signal end of stream as long as we have buffered data.
-  // In such case eventually host would playback all the data, and OnMoreData()
-  // would be called with buffers_state.pending_bytes == 0. At that moment
-  // we'll call SignalEndOfStream();
-  if (!has_buffered_data_)
-    SignalEndOfStream();
-}
-
-bool ReferenceAudioRenderer::OnInitialize(int bits_per_channel,
-                                          ChannelLayout channel_layout,
-                                          int sample_rate) {
-  int samples_per_packet = sample_rate / 10;
-  int hardware_buffer_size = samples_per_packet *
-      ChannelLayoutToChannelCount(channel_layout) * bits_per_channel / 8;
-
-  // Allocate audio buffer based on hardware buffer size.
-  buffer_capacity_ = 3 * hardware_buffer_size;
-  buffer_.reset(new uint8[buffer_capacity_]);
-
-  AudioParameters params(AudioParameters::AUDIO_PCM_LINEAR, channel_layout,
-                         sample_rate, bits_per_channel, samples_per_packet);
-  bytes_per_second_ = params.GetBytesPerSecond();
-
-  controller_ = AudioOutputController::Create(audio_manager_, this, params,
-                                              buffer_capacity_);
-  return controller_ != NULL;
-}
-
-void ReferenceAudioRenderer::OnStop() {
-  if (controller_)
-    controller_->Pause();
-}
-
-}  // namespace media