6589def397
This makes SetChannel() consistently make 2 invokes instead of a multiple of senders+receivers (previous minimum was 4 but could be larger). * Stop() doesn't hop to the worker thread. * SetMediaChannel(), an already-required step on the worker thread for senders and *sometimes* for receivers[1], is now consistently required for both. This simplifies transceiver teardown and enables the next bullet. * Transceiver stops all senders and receivers in one go rather than ping ponging between threads. [1] When not required, it was done implicitly inside of Stop(). See changes in `RtpTransceiver::SetChannel` Bug: webrtc:13540 Change-Id: Ied61636c8ef09d782bf519524fff2a31e15219a8 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/249797 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org> Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org> Cr-Commit-Position: refs/heads/main@{#36057}
111 lines
4.3 KiB
C++
111 lines
4.3 KiB
C++
/*
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* Copyright 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// This file contains classes that implement RtpReceiverInterface.
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// An RtpReceiver associates a MediaStreamTrackInterface with an underlying
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// transport (provided by cricket::VoiceChannel/cricket::VideoChannel)
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#ifndef PC_RTP_RECEIVER_H_
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#define PC_RTP_RECEIVER_H_
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#include <stdint.h>
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#include <string>
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#include <vector>
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#include "absl/types/optional.h"
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#include "api/crypto/frame_decryptor_interface.h"
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#include "api/dtls_transport_interface.h"
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#include "api/media_stream_interface.h"
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#include "api/media_types.h"
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#include "api/rtp_parameters.h"
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#include "api/rtp_receiver_interface.h"
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#include "api/scoped_refptr.h"
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#include "api/video/video_frame.h"
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#include "api/video/video_sink_interface.h"
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#include "api/video/video_source_interface.h"
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#include "media/base/media_channel.h"
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#include "media/base/video_broadcaster.h"
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#include "pc/video_track_source.h"
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#include "rtc_base/ref_counted_object.h"
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#include "rtc_base/thread.h"
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namespace webrtc {
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// Internal class used by PeerConnection.
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class RtpReceiverInternal : public RtpReceiverInterface {
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public:
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// Call on the signaling thread, to let the receiver know that the the
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// embedded source object should enter a stopped/ended state and the track's
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// state set to `kEnded`, a final state that cannot be reversed.
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virtual void Stop() = 0;
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// Call on the signaling thread to set the source's state to `ended` before
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// clearing the media channel (`SetMediaChannel(nullptr)`) on the worker
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// thread.
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// The difference between `Stop()` and `SetSourceEnded()` is that the latter
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// does not change the state of the associated track.
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// NOTE: Calling this function should be followed with a call to
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// `SetMediaChannel(nullptr)` on the worker thread, to complete the operation.
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virtual void SetSourceEnded() = 0;
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// Sets the underlying MediaEngine channel associated with this RtpSender.
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// A VoiceMediaChannel should be used for audio RtpSenders and
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// a VideoMediaChannel should be used for video RtpSenders.
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// NOTE:
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// * SetMediaChannel(nullptr) must be called before the media channel is
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// destroyed.
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// * This method must be invoked on the worker thread.
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virtual void SetMediaChannel(cricket::MediaChannel* media_channel) = 0;
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// Configures the RtpReceiver with the underlying media channel, with the
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// given SSRC as the stream identifier.
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virtual void SetupMediaChannel(uint32_t ssrc) = 0;
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// Configures the RtpReceiver with the underlying media channel to receive an
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// unsignaled receive stream.
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virtual void SetupUnsignaledMediaChannel() = 0;
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virtual void set_transport(
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rtc::scoped_refptr<DtlsTransportInterface> dtls_transport) = 0;
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// This SSRC is used as an identifier for the receiver between the API layer
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// and the WebRtcVideoEngine, WebRtcVoiceEngine layer.
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virtual uint32_t ssrc() const = 0;
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// Call this to notify the RtpReceiver when the first packet has been received
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// on the corresponding channel.
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virtual void NotifyFirstPacketReceived() = 0;
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// Set the associated remote media streams for this receiver. The remote track
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// will be removed from any streams that are no longer present and added to
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// any new streams.
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virtual void set_stream_ids(std::vector<std::string> stream_ids) = 0;
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// TODO(https://crbug.com/webrtc/9480): Remove SetStreams() in favor of
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// set_stream_ids() as soon as downstream projects are no longer dependent on
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// stream objects.
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virtual void SetStreams(
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const std::vector<rtc::scoped_refptr<MediaStreamInterface>>& streams) = 0;
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// Returns an ID that changes if the attached track changes, but
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// otherwise remains constant. Used to generate IDs for stats.
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// The special value zero means that no track is attached.
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virtual int AttachmentId() const = 0;
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protected:
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static int GenerateUniqueId();
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static std::vector<rtc::scoped_refptr<MediaStreamInterface>>
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CreateStreamsFromIds(std::vector<std::string> stream_ids);
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};
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} // namespace webrtc
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#endif // PC_RTP_RECEIVER_H_
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