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// 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_AUDIO_MODEM_PUBLIC_WHISPERNET_CLIENT_H_
#define COMPONENTS_AUDIO_MODEM_PUBLIC_WHISPERNET_CLIENT_H_
#include <string>
#include "base/memory/ref_counted.h"
#include "components/audio_modem/public/audio_modem_types.h"
#include "media/base/audio_bus.h"
namespace audio_modem {
// Generic callback to indicate a boolean success or failure.
using SuccessCallback = base::Callback<void(bool)>;
// Callback to receive encoded samples from Whispernet.
// AudioType type: Type of audio encoding - AUDIBLE or INAUDIBLE.
// const std::string& token: The token that we encoded.
// const scoped_refptr<media::AudioBusRefCounted>& samples - Encoded samples.
using SamplesCallback =
base::Callback<void(AudioType,
const std::string&,
const scoped_refptr<media::AudioBusRefCounted>&)>;
// A client for the Whispernet audio library,
// responsible for the actual encoding and decoding of tokens.
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;
// Fires an event to request a token encode.
virtual void EncodeToken(const std::string& token,
AudioType type,
const TokenParameters token_params[2]) = 0;
// Fires an event to request a decode for the given samples.
virtual void DecodeSamples(AudioType type,
const std::string& samples,
const TokenParameters token_params[2]) = 0;
// Callback registration methods. The modem will set these to receive data.
virtual void RegisterTokensCallback(
const TokensCallback& tokens_callback) = 0;
virtual void RegisterSamplesCallback(
const SamplesCallback& samples_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 GetInitializedCallback() = 0;
virtual ~WhispernetClient() {}
};
} // namespace audio_modem
#endif // COMPONENTS_AUDIO_MODEM_PUBLIC_WHISPERNET_CLIENT_H_
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