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/*
* Copyright 2019 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef PC_AUDIO_RTP_RECEIVER_H_
#define PC_AUDIO_RTP_RECEIVER_H_
#include <stdint.h>
#include <string>
#include <vector>
#include "absl/types/optional.h"
#include "api/crypto/frame_decryptor_interface.h"
#include "api/dtls_transport_interface.h"
#include "api/frame_transformer_interface.h"
#include "api/media_stream_interface.h"
#include "api/media_types.h"
#include "api/rtp_parameters.h"
#include "api/rtp_receiver_interface.h"
#include "api/scoped_refptr.h"
#include "api/sequence_checker.h"
#include "api/task_queue/pending_task_safety_flag.h"
#include "api/transport/rtp/rtp_source.h"
#include "media/base/media_channel.h"
#include "pc/audio_track.h"
#include "pc/jitter_buffer_delay.h"
#include "pc/media_stream_track_proxy.h"
#include "pc/remote_audio_source.h"
#include "pc/rtp_receiver.h"
#include "rtc_base/system/no_unique_address.h"
#include "rtc_base/thread.h"
#include "rtc_base/thread_annotations.h"
namespace webrtc {
class AudioRtpReceiver : public ObserverInterface,
public AudioSourceInterface::AudioObserver,
public RtpReceiverInternal {
public:
// The constructor supports optionally passing the voice channel to the
// instance at construction time without having to call `SetMediaChannel()`
// on the worker thread straight after construction.
// However, when using that, the assumption is that right after construction,
// a call to either `SetupUnsignaledMediaChannel` or `SetupMediaChannel`
// will be made, which will internally start the source on the worker thread.
AudioRtpReceiver(
rtc::Thread* worker_thread,
std::string receiver_id,
std::vector<std::string> stream_ids,
bool is_unified_plan,
cricket::VoiceMediaReceiveChannelInterface* voice_channel = nullptr);
// TODO(https://crbug.com/webrtc/9480): Remove this when streams() is removed.
AudioRtpReceiver(
rtc::Thread* worker_thread,
const std::string& receiver_id,
const std::vector<rtc::scoped_refptr<MediaStreamInterface>>& streams,
bool is_unified_plan,
cricket::VoiceMediaReceiveChannelInterface* media_channel = nullptr);
virtual ~AudioRtpReceiver();
// ObserverInterface implementation
void OnChanged() override;
// AudioSourceInterface::AudioObserver implementation
void OnSetVolume(double volume) override;
rtc::scoped_refptr<AudioTrackInterface> audio_track() const { return track_; }
// RtpReceiverInterface implementation
rtc::scoped_refptr<MediaStreamTrackInterface> track() const override {
return track_;
}
rtc::scoped_refptr<DtlsTransportInterface> dtls_transport() const override;
std::vector<std::string> stream_ids() const override;
std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams()
const override;
cricket::MediaType media_type() const override {
return cricket::MEDIA_TYPE_AUDIO;
}
std::string id() const override { return id_; }
RtpParameters GetParameters() const override;
void SetFrameDecryptor(
rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor) override;
rtc::scoped_refptr<FrameDecryptorInterface> GetFrameDecryptor()
const override;
// RtpReceiverInternal implementation.
void Stop() override;
void SetupMediaChannel(uint32_t ssrc) override;
void SetupUnsignaledMediaChannel() override;
absl::optional<uint32_t> ssrc() const override;
void NotifyFirstPacketReceived() override;
void set_stream_ids(std::vector<std::string> stream_ids) override;
void set_transport(
rtc::scoped_refptr<DtlsTransportInterface> dtls_transport) override;
void SetStreams(const std::vector<rtc::scoped_refptr<MediaStreamInterface>>&
streams) override;
void SetObserver(RtpReceiverObserverInterface* observer) override;
void SetJitterBufferMinimumDelay(
absl::optional<double> delay_seconds) override;
void SetMediaChannel(
cricket::MediaReceiveChannelInterface* media_channel) override;
std::vector<RtpSource> GetSources() const override;
int AttachmentId() const override { return attachment_id_; }
void SetDepacketizerToDecoderFrameTransformer(
rtc::scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer)
override;
private:
void RestartMediaChannel(absl::optional<uint32_t> ssrc)
RTC_RUN_ON(&signaling_thread_checker_);
void RestartMediaChannel_w(absl::optional<uint32_t> ssrc,
bool track_enabled,
MediaSourceInterface::SourceState state)
RTC_RUN_ON(worker_thread_);
void Reconfigure(bool track_enabled) RTC_RUN_ON(worker_thread_);
void SetOutputVolume_w(double volume) RTC_RUN_ON(worker_thread_);
RTC_NO_UNIQUE_ADDRESS SequenceChecker signaling_thread_checker_;
rtc::Thread* const worker_thread_;
const std::string id_;
const rtc::scoped_refptr<RemoteAudioSource> source_;
const rtc::scoped_refptr<AudioTrackProxyWithInternal<AudioTrack>> track_;
cricket::VoiceMediaReceiveChannelInterface* media_channel_
RTC_GUARDED_BY(worker_thread_) = nullptr;
absl::optional<uint32_t> signaled_ssrc_ RTC_GUARDED_BY(worker_thread_);
std::vector<rtc::scoped_refptr<MediaStreamInterface>> streams_
RTC_GUARDED_BY(&signaling_thread_checker_);
bool cached_track_enabled_ RTC_GUARDED_BY(&signaling_thread_checker_);
double cached_volume_ RTC_GUARDED_BY(worker_thread_) = 1.0;
RtpReceiverObserverInterface* observer_
RTC_GUARDED_BY(&signaling_thread_checker_) = nullptr;
bool received_first_packet_ RTC_GUARDED_BY(&signaling_thread_checker_) =
false;
const int attachment_id_;
rtc::scoped_refptr<FrameDecryptorInterface> frame_decryptor_
RTC_GUARDED_BY(worker_thread_);
rtc::scoped_refptr<DtlsTransportInterface> dtls_transport_
RTC_GUARDED_BY(&signaling_thread_checker_);
// Stores and updates the playout delay. Handles caching cases if
// `SetJitterBufferMinimumDelay` is called before start.
JitterBufferDelay delay_ RTC_GUARDED_BY(worker_thread_);
rtc::scoped_refptr<FrameTransformerInterface> frame_transformer_
RTC_GUARDED_BY(worker_thread_);
const rtc::scoped_refptr<PendingTaskSafetyFlag> worker_thread_safety_;
};
} // namespace webrtc
#endif // PC_AUDIO_RTP_RECEIVER_H_
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