chromium/media/audio/audio_debug_recording_manager.h

// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_AUDIO_AUDIO_DEBUG_RECORDING_MANAGER_H_
#define MEDIA_AUDIO_AUDIO_DEBUG_RECORDING_MANAGER_H_

#include <map>
#include <memory>
#include <utility>

#include "base/functional/callback.h"
#include "base/gtest_prod_util.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "media/audio/audio_debug_recording_helper.h"
#include "media/base/audio_parameters.h"
#include "media/base/media_export.h"

namespace base {
class SingleThreadTaskRunner;
}

namespace media {

// A manager for audio debug recording that handles registration of data
// sources and hands them a recorder (AudioDebugRecordingHelper) to feed data
// to. The recorder will unregister with the manager automatically when deleted.
// When debug recording is enabled, it is enabled on all recorders and
// constructs a unique file name for each recorder by using a running ID.
// A somewhat simplified diagram of the the debug recording infrastructure,
// interfaces omitted:
//
//                                AudioDebugFileWriter
//                                        ^
//                                        | owns
//                        owns            |                     owns
//   OnMoreDataConverter  ---->  AudioDebugRecordingHelper <---------
//            ^                           ^                          |
//            | owns several              | raw pointer to several   |
//            |                   AudioDebugRecordingManager         |
//   AudioOutputResampler                 ^                          |
//            ^                           |      AudioInputStreamDataInterceptor
//            |                           |                          ^
//            | owns several              | owns        owns several |
//             ------------------  AudioManagerBase  ----------------
//
// AudioDebugRecordingManager is created when
// AudioManager::InitializeDebugRecording() is called. That is done in
// AudioManager::Create() in WebRTC enabled builds, but not in non WebRTC
// enabled builds. If AudioDebugRecordingManager is not created, neither is
// AudioDebugRecordingHelper or AudioDebugFileWriter. In this case the pointers
// to AudioDebugRecordingManager and AudioDebugRecordingHelper are null.

class MEDIA_EXPORT AudioDebugRecordingManager { … };

}  // namespace media

#endif  // MEDIA_AUDIO_AUDIO_DEBUG_RECORDING_MANAGER_H_