Creating the audio_modem component

components/copresence/public/whispernet_client.h

-// Copyright 2014 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 COMPONENTS_COPRESENCE_PUBLIC_WHISPERNET_CLIENT_H_
-#define COMPONENTS_COPRESENCE_PUBLIC_WHISPERNET_CLIENT_H_
-
-#include <string>
-
-#include "components/copresence/public/copresence_constants.h"
-
-namespace media {
-class AudioBusRefCounted;
-}
-
-namespace copresence {
-
-// The interface that the whispernet client needs to implement. These methods
-// provide us the ability to use the audio medium in copresence. Currently since
-// the only medium that copresence uses is audio, the implementation of this
-// interface is required.
-class WhispernetClient {
- public:
-  // Initialize the whispernet client and call the callback when done. The
-  // parameter indicates whether we succeeded or failed.
-  virtual void Initialize(const SuccessCallback& init_callback) = 0;
-  // Copresence will call this before making any calls to its destructors.
-  virtual void Shutdown() = 0;
-
-  // Fires an event to request a token encode.
-  virtual void EncodeToken(const std::string& token, AudioType type) = 0;
-  // Fires an event to request a decode for the given samples.
-  virtual void DecodeSamples(AudioType type,
-                             const std::string& samples,
-                             const size_t token_length[2]) = 0;
-  // Fires an event to request detection of a whispernet broadcast.
-  virtual void DetectBroadcast() = 0;
-
-  // Callback registreation methods. These are the callbacks that will be
-  // registered by Copresence to receive data.
-  virtual void RegisterTokensCallback(
-      const TokensCallback& tokens_callback) = 0;
-  virtual void RegisterSamplesCallback(
-      const SamplesCallback& samples_callback) = 0;
-  virtual void RegisterDetectBroadcastCallback(
-      const SuccessCallback& db_callback) = 0;
-
-  // Don't cache these callbacks, as they may become invalid at any time.
-  // Always invoke callbacks directly through these accessors.
-  virtual TokensCallback GetTokensCallback() = 0;
-  virtual SamplesCallback GetSamplesCallback() = 0;
-  virtual SuccessCallback GetDetectBroadcastCallback() = 0;
-  virtual SuccessCallback GetInitializedCallback() = 0;
-
-  virtual ~WhispernetClient() {}
-};
-
-}  // namespace copresence
-
-#endif  // COMPONENTS_COPRESENCE_PUBLIC_WHISPERNET_CLIENT_H_