media: Support better decoder switching

media/renderers/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 "media/renderers/audio_renderer_impl.h"
 
 #include <math.h>
 #include <stddef.h>
 #include <algorithm>
 #include <utility>
@@ skipping 338 matching lines @@
 
   // Trying to track down AudioClock crash, http://crbug.com/674856.
   // AudioRenderImpl should only be initialized once to avoid destroying
   // AudioClock while the audio thread is still using it.
   CHECK_EQ(audio_clock_.get(), nullptr);
 
   state_ = kInitializing;
   client_ = client;
 
   audio_buffer_stream_ = base::MakeUnique<AudioBufferStream>(
-      task_runner_, create_audio_decoders_cb_.Run(), media_log_);
+      task_runner_, create_audio_decoders_cb_, media_log_);
 
   audio_buffer_stream_->set_config_change_observer(base::Bind(
       &AudioRendererImpl::OnConfigChange, weak_factory_.GetWeakPtr()));
 
   // Always post |init_cb_| because |this| could be destroyed if initialization
   // failed.
   init_cb_ = BindToCurrentLoop(init_cb);
 
   auto output_device_info = sink_->GetOutputDeviceInfo();
   const AudioParameters& hw_params = output_device_info.output_params();
@@ skipping 639 matching lines @@
   // All channels with a zero mix are muted and can be ignored.
   std::vector<bool> channel_mask(audio_parameters_.channels(), false);
   for (size_t ch = 0; ch < matrix.size(); ++ch) {
     channel_mask[ch] = std::any_of(matrix[ch].begin(), matrix[ch].end(),
                                    [](float mix) { return !!mix; });
   }
   algorithm_->SetChannelMask(std::move(channel_mask));
 }
 
 }  // namespace media