| // 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 COBALT_MEDIA_CAST_SENDER_AUDIO_SENDER_H_ |
| #define COBALT_MEDIA_CAST_SENDER_AUDIO_SENDER_H_ |
| |
| #include <memory> |
| |
| #include "base/callback.h" |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/threading/non_thread_safe.h" |
| #include "base/time/tick_clock.h" |
| #include "base/time/time.h" |
| #include "media/base/audio_bus.h" |
| #include "media/cast/cast_config.h" |
| #include "media/cast/cast_sender.h" |
| #include "media/cast/sender/frame_sender.h" |
| |
| namespace cobalt { |
| namespace media { |
| namespace cast { |
| |
| class AudioEncoder; |
| |
| // Not thread safe. Only called from the main cast thread. |
| // This class owns all objects related to sending audio, objects that create RTP |
| // packets, congestion control, audio encoder, parsing and sending of |
| // RTCP packets. |
| // Additionally it posts a bunch of delayed tasks to the main thread for various |
| // timeouts. |
| class AudioSender : public FrameSender, |
| public base::NonThreadSafe, |
| public base::SupportsWeakPtr<AudioSender> { |
| public: |
| AudioSender(scoped_refptr<CastEnvironment> cast_environment, |
| const FrameSenderConfig& audio_config, |
| const StatusChangeCallback& status_change_cb, |
| CastTransport* const transport_sender); |
| |
| ~AudioSender() final; |
| |
| // Note: It is not guaranteed that |audio_frame| will actually be encoded and |
| // sent, if AudioSender detects too many frames in flight. Therefore, clients |
| // should be careful about the rate at which this method is called. |
| void InsertAudio(std::unique_ptr<AudioBus> audio_bus, |
| const base::TimeTicks& recorded_time); |
| |
| protected: |
| int GetNumberOfFramesInEncoder() const final; |
| base::TimeDelta GetInFlightMediaDuration() const final; |
| |
| private: |
| // Called by the |audio_encoder_| with the next EncodedFrame to send. |
| void OnEncodedAudioFrame(int encoder_bitrate, |
| std::unique_ptr<SenderEncodedFrame> encoded_frame, |
| int samples_skipped); |
| |
| // Encodes AudioBuses into EncodedFrames. |
| std::unique_ptr<AudioEncoder> audio_encoder_; |
| |
| // The number of audio samples enqueued in |audio_encoder_|. |
| int samples_in_encoder_; |
| |
| // NOTE: Weak pointers must be invalidated before all other member variables. |
| base::WeakPtrFactory<AudioSender> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AudioSender); |
| }; |
| |
| } // namespace cast |
| } // namespace media |
| } // namespace cobalt |
| |
| #endif // COBALT_MEDIA_CAST_SENDER_AUDIO_SENDER_H_ |