101 lines
3.5 KiB
C
101 lines
3.5 KiB
C
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/*
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* Copyright 2020 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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#ifndef PC_TRANSCEIVER_LIST_H_
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#define PC_TRANSCEIVER_LIST_H_
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#include <algorithm>
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#include <map>
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#include <string>
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#include <vector>
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#include "pc/rtp_transceiver.h"
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namespace webrtc {
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typedef rtc::scoped_refptr<RtpTransceiverProxyWithInternal<RtpTransceiver>>
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RtpTransceiverProxyRefPtr;
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// Captures partial state to be used for rollback. Applicable only in
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// Unified Plan.
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class TransceiverStableState {
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public:
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TransceiverStableState() {}
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void set_newly_created();
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void SetMSectionIfUnset(absl::optional<std::string> mid,
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absl::optional<size_t> mline_index);
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void SetRemoteStreamIdsIfUnset(const std::vector<std::string>& ids);
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absl::optional<std::string> mid() const { return mid_; }
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absl::optional<size_t> mline_index() const { return mline_index_; }
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absl::optional<std::vector<std::string>> remote_stream_ids() const {
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return remote_stream_ids_;
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}
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bool has_m_section() const { return has_m_section_; }
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bool newly_created() const { return newly_created_; }
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private:
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absl::optional<std::string> mid_;
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absl::optional<size_t> mline_index_;
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absl::optional<std::vector<std::string>> remote_stream_ids_;
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// Indicates that mid value from stable state has been captured and
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// that rollback has to restore the transceiver. Also protects against
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// subsequent overwrites.
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bool has_m_section_ = false;
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// Indicates that the transceiver was created as part of applying a
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// description to track potential need for removing transceiver during
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// rollback.
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bool newly_created_ = false;
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};
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class TransceiverList {
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public:
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std::vector<RtpTransceiverProxyRefPtr> List() const { return transceivers_; }
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void Add(RtpTransceiverProxyRefPtr transceiver) {
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transceivers_.push_back(transceiver);
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}
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void Remove(RtpTransceiverProxyRefPtr transceiver) {
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transceivers_.erase(
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std::remove(transceivers_.begin(), transceivers_.end(), transceiver),
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transceivers_.end());
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}
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RtpTransceiverProxyRefPtr FindBySender(
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rtc::scoped_refptr<RtpSenderInterface> sender) const;
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RtpTransceiverProxyRefPtr FindByMid(const std::string& mid) const;
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RtpTransceiverProxyRefPtr FindByMLineIndex(size_t mline_index) const;
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// Find or create the stable state for a transceiver.
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TransceiverStableState* StableState(RtpTransceiverProxyRefPtr transceiver) {
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return &(transceiver_stable_states_by_transceivers_[transceiver]);
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}
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void DiscardStableStates() {
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transceiver_stable_states_by_transceivers_.clear();
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}
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std::map<RtpTransceiverProxyRefPtr, TransceiverStableState>& StableStates() {
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return transceiver_stable_states_by_transceivers_;
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}
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private:
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std::vector<RtpTransceiverProxyRefPtr> transceivers_;
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// Holds changes made to transceivers during applying descriptors for
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// potential rollback. Gets cleared once signaling state goes to stable.
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std::map<RtpTransceiverProxyRefPtr, TransceiverStableState>
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transceiver_stable_states_by_transceivers_;
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// Holds remote stream ids for transceivers from stable state.
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std::map<RtpTransceiverProxyRefPtr, std::vector<std::string>>
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remote_stream_ids_by_transceivers_;
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};
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} // namespace webrtc
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#endif // PC_TRANSCEIVER_LIST_H_
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