Forward output glitch information from stream WebRTC log

media/audio/audio_manager.h

 // 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.
 
 #ifndef MEDIA_AUDIO_AUDIO_MANAGER_H_
 #define MEDIA_AUDIO_AUDIO_MANAGER_H_
 
 #include <memory>
 #include <string>
 
+#include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "base/strings/string16.h"
 #include "build/build_config.h"
 #include "media/audio/audio_device_name.h"
 #include "media/audio/audio_logging.h"
 #include "media/base/audio_parameters.h"
 
 namespace base {
@@ skipping 104 matching lines @@
   // Audio worker thread (see GetWorkerTaskRunner()).
   virtual void GetAudioInputDeviceNames(AudioDeviceNames* device_names) = 0;
 
   // Appends a list of available output devices to |device_names|,
   // which must initially be empty.
   //
   // Not threadsafe; in production this should only be called from the
   // Audio worker thread (see GetWorkerTaskRunner()).
   virtual void GetAudioOutputDeviceNames(AudioDeviceNames* device_names) = 0;
 
+  // Log callback used for sending log messages from a stream to the object
+  // that manages the stream.
+  using StatisticsCallback =

[DaleCurtis, 2016/05/19 20:34:37]

Again, this should just be a base::Callback(string).

[Henrik Grunell, 2016/05/23 17:13:54]

Done.

+      base::Callback<void(AudioOutputStream*, const std::string&, int)>;
+
   // Factory for all the supported stream formats. |params| defines parameters
   // of the audio stream to be created.
   //
   // |params.sample_per_packet| is the requested buffer allocation which the
   // audio source thinks it can usually fill without blocking. Internally two
   // or three buffers are created, one will be locked for playback and one will
   // be ready to be filled in the call to AudioSourceCallback::OnMoreData().
   //
   // To create a stream for the default output device, pass an empty string
   // for |device_id|, otherwise the specified audio device will be opened.
   //
   // Returns NULL if the combination of the parameters is not supported, or if
   // we have reached some other platform specific limit.
   //
   // |params.format| can be set to AUDIO_PCM_LOW_LATENCY and that has two
   // effects:
   // 1- Instead of triple buffered the audio will be double buffered.
   // 2- A low latency driver or alternative audio subsystem will be used when
   //    available.
   //
   // Do not free the returned AudioOutputStream. It is owned by AudioManager.
   virtual AudioOutputStream* MakeAudioOutputStream(
       const AudioParameters& params,
-      const std::string& device_id) = 0;
+      const std::string& device_id,
+      const StatisticsCallback& statistics_callback) = 0;
 
   // Creates new audio output proxy. A proxy implements
   // AudioOutputStream interface, but unlike regular output stream
   // created with MakeAudioOutputStream() it opens device only when a
   // sound is actually playing.
   virtual AudioOutputStream* MakeAudioOutputStreamProxy(
       const AudioParameters& params,
       const std::string& device_id) = 0;
 
   // Factory to create audio recording streams.
@@ skipping 79 matching lines @@
   friend class base::DeleteHelper<AudioManager>;
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner_;
   DISALLOW_COPY_AND_ASSIGN(AudioManager);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_MANAGER_H_