Mixing audio with different latency requirements

content/renderer/media/track_audio_renderer.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/track_audio_renderer.h"
 
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/trace_event/trace_event.h"
 #include "content/renderer/media/audio_device_factory.h"
 #include "content/renderer/media/media_stream_audio_track.h"
-#include "content/renderer/media/webrtc_audio_renderer.h"
 #include "media/base/audio_bus.h"
+#include "media/base/audio_latency.h"
 #include "media/base/audio_shifter.h"
 
 namespace content {
 
 namespace {
 
 enum LocalRendererSinkStates {
   kSinkStarted = 0,
   kSinkNeverStarted,
   kSinkStatesMax  // Must always be last!
@@ skipping 277 matching lines @@
   const media::OutputDeviceInfo& device_info = sink_->GetOutputDeviceInfo();
   if (device_info.device_status() != media::OUTPUT_DEVICE_STATUS_OK)
     return;
 
   // Output parameters consist of the same channel layout and sample rate as the
   // source, but having the buffer duration preferred by the hardware.
   const media::AudioParameters& hardware_params = device_info.output_params();
   media::AudioParameters sink_params(
       hardware_params.format(), source_params_.channel_layout(),
       source_params_.sample_rate(), source_params_.bits_per_sample(),
-      WebRtcAudioRenderer::GetOptimalBufferSize(
+      media::AudioLatency::GetRtcBufferSize(
           source_params_.sample_rate(), hardware_params.frames_per_buffer()));
   DVLOG(1) << ("TrackAudioRenderer::MaybeStartSink() -- Starting sink.  "
                "source_params_={")
            << source_params_.AsHumanReadableString() << "}, hardware_params_={"
            << hardware_params.AsHumanReadableString() << "}, sink parameters={"
            << sink_params.AsHumanReadableString() << '}';
   sink_->Initialize(sink_params, this);
   sink_->Start();
   sink_->SetVolume(volume_);
   sink_->Play();  // Not all the sinks play on start.
@@ skipping 56 matching lines @@
   if (source_params_.IsValid()) {
     prior_elapsed_render_time_ =
         ComputeTotalElapsedRenderTime(prior_elapsed_render_time_,
                                       num_samples_rendered_,
                                       source_params_.sample_rate());
     num_samples_rendered_ = 0;
   }
 }
 
 }  // namespace content