| // 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. |
| |
| #ifndef CONTENT_RENDERER_MEDIA_RECORDER_AUDIO_TRACK_ENCODER_H_ |
| #define CONTENT_RENDERER_MEDIA_RECORDER_AUDIO_TRACK_ENCODER_H_ |
| |
| #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> { |
| public: |
| 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; } |
| |
| protected: |
| friend class base::RefCountedThreadSafe<AudioTrackEncoder>; |
| |
| virtual ~AudioTrackEncoder(); |
| |
| bool paused_; |
| |
| const OnEncodedAudioCB on_encoded_audio_cb_; |
| |
| THREAD_CHECKER(encoder_thread_checker_); |
| |
| // The original input audio parameters. |
| media::AudioParameters input_params_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AudioTrackEncoder); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_RENDERER_MEDIA_RECORDER_AUDIO_TRACK_ENCODER_H_ |