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/*
* Copyright (c) 2015 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 AUDIO_AUDIO_RECEIVE_STREAM_H_
#define AUDIO_AUDIO_RECEIVE_STREAM_H_
#include <cstddef>
#include <cstdint>
#include <map>
#include <memory>
#include <optional>
#include <string>
#include <vector>
#include "absl/strings/string_view.h"
#include "api/audio/audio_frame.h"
#include "api/audio/audio_mixer.h"
#include "api/audio_codecs/audio_format.h"
#include "api/crypto/frame_decryptor_interface.h"
#include "api/environment/environment.h"
#include "api/frame_transformer_interface.h"
#include "api/neteq/neteq_factory.h"
#include "api/rtp_headers.h"
#include "api/scoped_refptr.h"
#include "api/sequence_checker.h"
#include "api/transport/rtp/rtp_source.h"
#include "audio/audio_state.h"
#include "call/audio_receive_stream.h"
#include "call/audio_state.h"
#include "call/syncable.h"
#include "rtc_base/system/no_unique_address.h"
#include "rtc_base/thread_annotations.h"
namespace webrtc {
class PacketRouter;
class RtpStreamReceiverControllerInterface;
class RtpStreamReceiverInterface;
namespace voe {
class ChannelReceiveInterface;
} // namespace voe
class AudioReceiveStreamImpl final : public webrtc::AudioReceiveStreamInterface,
public AudioMixer::Source,
public Syncable {
public:
AudioReceiveStreamImpl(
const Environment& env,
PacketRouter* packet_router,
NetEqFactory* neteq_factory,
const webrtc::AudioReceiveStreamInterface::Config& config,
const scoped_refptr<webrtc::AudioState>& audio_state);
// For unit tests, which need to supply a mock channel receive.
AudioReceiveStreamImpl(
const Environment& env,
PacketRouter* packet_router,
const webrtc::AudioReceiveStreamInterface::Config& config,
const scoped_refptr<webrtc::AudioState>& audio_state,
std::unique_ptr<voe::ChannelReceiveInterface> channel_receive);
AudioReceiveStreamImpl() = delete;
AudioReceiveStreamImpl(const AudioReceiveStreamImpl&) = delete;
AudioReceiveStreamImpl& operator=(const AudioReceiveStreamImpl&) = delete;
// Destruction happens on the worker thread. Prior to destruction the caller
// must ensure that a registration with the transport has been cleared. See
// `RegisterWithTransport` for details.
// TODO(tommi): As a further improvement to this, performing the full
// destruction on the network thread could be made the default.
~AudioReceiveStreamImpl() override;
// Called on the network thread to register/unregister with the network
// transport.
void RegisterWithTransport(
RtpStreamReceiverControllerInterface* receiver_controller);
// If registration has previously been done (via `RegisterWithTransport`) then
// `UnregisterFromTransport` must be called prior to destruction, on the
// network thread.
void UnregisterFromTransport();
// webrtc::AudioReceiveStreamInterface implementation.
void Start() override;
void Stop() override;
bool IsRunning() const override;
void SetDepacketizerToDecoderFrameTransformer(
scoped_refptr<webrtc::FrameTransformerInterface> frame_transformer)
override;
void SetDecoderMap(std::map<int, SdpAudioFormat> decoder_map) override;
void SetNackHistory(int history_ms) override;
void SetRtcpMode(RtcpMode mode) override;
void SetNonSenderRttMeasurement(bool enabled) override;
void SetFrameDecryptor(
scoped_refptr<webrtc::FrameDecryptorInterface> frame_decryptor) override;
webrtc::AudioReceiveStreamInterface::Stats GetStats(
bool get_and_clear_legacy_stats) const override;
void SetSink(AudioSinkInterface* sink) override;
void SetGain(float gain) override;
bool SetBaseMinimumPlayoutDelayMs(int delay_ms) override;
int GetBaseMinimumPlayoutDelayMs() const override;
std::vector<webrtc::RtpSource> GetSources() const override;
AudioMixer::Source* source() override { return this; }
// AudioMixer::Source
AudioFrameInfo GetAudioFrameWithInfo(int sample_rate_hz,
AudioFrame* audio_frame) override;
int Ssrc() const override;
int PreferredSampleRate() const override;
// Syncable
uint32_t id() const override;
std::optional<Syncable::Info> GetInfo() const override;
bool GetPlayoutRtpTimestamp(uint32_t* rtp_timestamp,
int64_t* time_ms) const override;
void SetEstimatedPlayoutNtpTimestampMs(int64_t ntp_timestamp_ms,
int64_t time_ms) override;
bool SetMinimumPlayoutDelay(int delay_ms) override;
void DeliverRtcp(const uint8_t* packet, size_t length);
void SetSyncGroup(absl::string_view sync_group);
void SetLocalSsrc(uint32_t local_ssrc);
uint32_t local_ssrc() const;
uint32_t remote_ssrc() const override {
// The remote_ssrc member variable of config_ will never change and can be
// considered const.
return config_.rtp.remote_ssrc;
}
// Returns a reference to the currently set sync group of the stream.
// Must be called on the packet delivery thread.
const std::string& sync_group() const;
// TODO(tommi): Remove this method.
void ReconfigureForTesting(
const webrtc::AudioReceiveStreamInterface::Config& config);
private:
internal::AudioState* audio_state() const;
RTC_NO_UNIQUE_ADDRESS SequenceChecker worker_thread_checker_;
// TODO(bugs.webrtc.org/11993): This checker conceptually represents
// operations that belong to the network thread. The Call class is currently
// moving towards handling network packets on the network thread and while
// that work is ongoing, this checker may in practice represent the worker
// thread, but still serves as a mechanism of grouping together concepts
// that belong to the network thread. Once the packets are fully delivered
// on the network thread, this comment will be deleted.
RTC_NO_UNIQUE_ADDRESS SequenceChecker packet_sequence_checker_{
SequenceChecker::kDetached};
webrtc::AudioReceiveStreamInterface::Config config_;
scoped_refptr<webrtc::AudioState> audio_state_;
const std::unique_ptr<voe::ChannelReceiveInterface> channel_receive_;
bool playing_ RTC_GUARDED_BY(worker_thread_checker_) = false;
std::unique_ptr<RtpStreamReceiverInterface> rtp_stream_receiver_
RTC_GUARDED_BY(packet_sequence_checker_);
};
} // namespace webrtc
#endif // AUDIO_AUDIO_RECEIVE_STREAM_H_
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