| // 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 { |
| 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, |
| Codec 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_ |