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// Copyright 2017 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 <memory>
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/threading/thread.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "media/base/audio_bus.h"
#include "media/base/audio_parameters.h"
namespace content {
// Base interface for an AudioTrackEncoder. This class and its subclasses are
// used by AudioTrackRecorder to encode audio before output. These are private
// classes and should not be used outside of AudioTrackRecorder.
// AudioTrackEncoder is created and destroyed on ATR's main thread (usually the
// main render thread) but otherwise should operate entirely on
// |encoder_thread_|, which is owned by AudioTrackRecorder. Be sure to delete
// |encoder_thread_| before deleting the AudioTrackEncoder using it.
class AudioTrackEncoder : public base::RefCountedThreadSafe<AudioTrackEncoder> {
using OnEncodedAudioCB =
base::Callback<void(const media::AudioParameters& params,
std::unique_ptr<std::string> encoded_data,
base::TimeTicks capture_time)>;
explicit AudioTrackEncoder(OnEncodedAudioCB on_encoded_audio_cb);
virtual void OnSetFormat(const media::AudioParameters& params) = 0;
virtual void EncodeAudio(std::unique_ptr<media::AudioBus> audio_bus,
base::TimeTicks capture_time) = 0;
void set_paused(bool paused) { paused_ = paused; }
friend class base::RefCountedThreadSafe<AudioTrackEncoder>;
virtual ~AudioTrackEncoder();
bool paused_;
const OnEncodedAudioCB on_encoded_audio_cb_;
// The original input audio parameters.
media::AudioParameters input_params_;
} // namespace content