Add a virtual beamforming audio device on ChromeOS.

chromecast/renderer/media/chromecast_media_renderer_factory.cc

 // Copyright 2015 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 "chromecast/renderer/media/chromecast_media_renderer_factory.h"
 
 #include "base/command_line.h"
 #include "chromecast/media/base/switching_media_renderer.h"
 #include "chromecast/media/cma/filters/cma_renderer.h"
 #include "chromecast/renderer/media/media_pipeline_proxy.h"
@@ skipping 28 matching lines @@
     ::media::AudioParameters input_audio_params;
     // TODO(servolk): Audio parameters are hardcoded for now, but in the future
     // either we need to obtain AudioHardwareConfig from RenderThreadImpl,
     // or media renderer needs to figure out optimal audio parameters itself.
     const int kDefaultSamplingRate = 48000;
     const int kDefaultBitsPerSample = 16;
     // About 20ms of stereo (2 channels) 16bit (2 byte) audio
     int buffer_size = kDefaultSamplingRate * 20 * 2 * 2 / 1000;
     ::media::AudioParameters output_audio_params(
         ::media::AudioParameters::AUDIO_PCM_LOW_LATENCY,
-        ::media::CHANNEL_LAYOUT_STEREO,
-        kDefaultSamplingRate, kDefaultBitsPerSample,
-        buffer_size, ::media::AudioParameters::NO_EFFECTS);
+        ::media::CHANNEL_LAYOUT_STEREO, kDefaultSamplingRate,
+        kDefaultBitsPerSample, buffer_size);
 
     audio_config_.reset(new ::media::AudioHardwareConfig(input_audio_params,
                                                          output_audio_params));
 
     default_render_factory_.reset(new ::media::DefaultRendererFactory(
         media_log_, /*gpu_factories*/ nullptr, *audio_config_));
   }
 
   DCHECK(default_render_factory_);
   // TODO(erickung): crbug.com/443956. Need to provide right LoadType.
   LoadType cma_load_type = kLoadTypeMediaSource;
   scoped_ptr<MediaPipeline> cma_media_pipeline(
       new MediaPipelineProxy(
           render_frame_id_,
           content::RenderThread::Get()->GetIOMessageLoopProxy(),
           cma_load_type));
   scoped_ptr<CmaRenderer> cma_renderer(new CmaRenderer(
       cma_media_pipeline.Pass(), video_renderer_sink, gpu_factories_));
   scoped_ptr<::media::Renderer> default_media_render(
       default_render_factory_->CreateRenderer(
           media_task_runner, media_task_runner, audio_renderer_sink,
           video_renderer_sink));
   scoped_ptr<SwitchingMediaRenderer> media_renderer(new SwitchingMediaRenderer(
       default_media_render.Pass(), cma_renderer.Pass()));
   return media_renderer.Pass();
 }
 
 }  // namespace media
 }  // namespace chromecast