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media / cast / encoding / audio_encoder.h [blame]
// Copyright 2014 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_CAST_ENCODING_AUDIO_ENCODER_H_
#define MEDIA_CAST_ENCODING_AUDIO_ENCODER_H_
#include <memory>
#include "base/memory/scoped_refptr.h"
#include "base/threading/thread_checker.h"
#include "media/base/audio_bus.h"
#include "media/cast/cast_environment.h"
#include "media/cast/common/sender_encoded_frame.h"
#include "media/cast/constants.h"
namespace base {
class TimeTicks;
}
namespace media {
enum class AudioCodec;
namespace cast {
class AudioEncoder {
public:
// Callback to deliver each SenderEncodedFrame, plus the number of audio
// samples skipped since the last frame.
using FrameEncodedCallback =
base::RepeatingCallback<void(std::unique_ptr<SenderEncodedFrame>, int)>;
AudioEncoder(const scoped_refptr<CastEnvironment>& cast_environment,
int num_channels,
int sampling_rate,
int bitrate,
AudioCodec codec,
FrameEncodedCallback frame_encoded_callback);
AudioEncoder(const AudioEncoder&) = delete;
AudioEncoder& operator=(const AudioEncoder&) = delete;
virtual ~AudioEncoder();
OperationalStatus InitializationResult() const;
int GetSamplesPerFrame() const;
base::TimeDelta GetFrameDuration() const;
int GetBitrate() const;
void InsertAudio(std::unique_ptr<AudioBus> audio_bus,
base::TimeTicks recorded_time);
private:
class ImplBase;
class OpusImpl;
class Pcm16Impl;
class AppleAacImpl;
const scoped_refptr<CastEnvironment> cast_environment_;
scoped_refptr<ImplBase> impl_;
// Used to ensure only one thread invokes InsertAudio().
THREAD_CHECKER(insert_thread_checker_);
};
} // namespace cast
} // namespace media
#endif // MEDIA_CAST_ENCODING_AUDIO_ENCODER_H_