blob: 02367fdc0eefcc9261644948e91b43cb3854da05 [file] [log] [blame]
/*
* Copyright 2021 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.
*/
#include "pc/jsep_transport_collection.h"
#include <algorithm>
#include <map>
#include <type_traits>
#include <utility>
#include "p2p/base/p2p_constants.h"
#include "rtc_base/logging.h"
namespace webrtc {
void BundleManager::Update(const cricket::SessionDescription* description) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
bundle_groups_.clear();
for (const cricket::ContentGroup* new_bundle_group :
description->GetGroupsByName(cricket::GROUP_TYPE_BUNDLE)) {
bundle_groups_.push_back(
std::make_unique<cricket::ContentGroup>(*new_bundle_group));
RTC_DLOG(LS_VERBOSE) << "Establishing bundle group "
<< new_bundle_group->ToString();
}
established_bundle_groups_by_mid_.clear();
for (const auto& bundle_group : bundle_groups_) {
for (const std::string& content_name : bundle_group->content_names()) {
established_bundle_groups_by_mid_[content_name] = bundle_group.get();
}
}
}
const cricket::ContentGroup* BundleManager::LookupGroupByMid(
const std::string& mid) const {
auto it = established_bundle_groups_by_mid_.find(mid);
return it != established_bundle_groups_by_mid_.end() ? it->second : nullptr;
}
bool BundleManager::IsFirstMidInGroup(const std::string& mid) const {
auto group = LookupGroupByMid(mid);
if (!group) {
return true; // Unbundled MIDs are considered group leaders
}
return mid == *(group->FirstContentName());
}
cricket::ContentGroup* BundleManager::LookupGroupByMid(const std::string& mid) {
auto it = established_bundle_groups_by_mid_.find(mid);
return it != established_bundle_groups_by_mid_.end() ? it->second : nullptr;
}
void BundleManager::DeleteMid(const cricket::ContentGroup* bundle_group,
const std::string& mid) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
RTC_LOG(LS_VERBOSE) << "Deleting mid " << mid << " from bundle group "
<< bundle_group->ToString();
// Remove the rejected content from the `bundle_group`.
// The const pointer arg is used to identify the group, we verify
// it before we use it to make a modification.
auto bundle_group_it = std::find_if(
bundle_groups_.begin(), bundle_groups_.end(),
[bundle_group](std::unique_ptr<cricket::ContentGroup>& group) {
return bundle_group == group.get();
});
RTC_DCHECK(bundle_group_it != bundle_groups_.end());
(*bundle_group_it)->RemoveContentName(mid);
established_bundle_groups_by_mid_.erase(
established_bundle_groups_by_mid_.find(mid));
}
void BundleManager::DeleteGroup(const cricket::ContentGroup* bundle_group) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
RTC_DLOG(LS_VERBOSE) << "Deleting bundle group " << bundle_group->ToString();
auto bundle_group_it = std::find_if(
bundle_groups_.begin(), bundle_groups_.end(),
[bundle_group](std::unique_ptr<cricket::ContentGroup>& group) {
return bundle_group == group.get();
});
RTC_DCHECK(bundle_group_it != bundle_groups_.end());
auto mid_list = (*bundle_group_it)->content_names();
for (const auto& content_name : mid_list) {
DeleteMid(bundle_group, content_name);
}
bundle_groups_.erase(bundle_group_it);
}
void JsepTransportCollection::RegisterTransport(
const std::string& mid,
std::unique_ptr<cricket::JsepTransport> transport) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
SetTransportForMid(mid, transport.get());
jsep_transports_by_name_[mid] = std::move(transport);
RTC_DCHECK(IsConsistent());
}
std::vector<cricket::JsepTransport*> JsepTransportCollection::Transports() {
RTC_DCHECK_RUN_ON(&sequence_checker_);
std::vector<cricket::JsepTransport*> result;
for (auto& kv : jsep_transports_by_name_) {
result.push_back(kv.second.get());
}
return result;
}
void JsepTransportCollection::DestroyAllTransports() {
RTC_DCHECK_RUN_ON(&sequence_checker_);
for (const auto& jsep_transport : jsep_transports_by_name_) {
map_change_callback_(jsep_transport.first, nullptr);
}
jsep_transports_by_name_.clear();
RTC_DCHECK(IsConsistent());
}
const cricket::JsepTransport* JsepTransportCollection::GetTransportByName(
const std::string& transport_name) const {
RTC_DCHECK_RUN_ON(&sequence_checker_);
auto it = jsep_transports_by_name_.find(transport_name);
return (it == jsep_transports_by_name_.end()) ? nullptr : it->second.get();
}
cricket::JsepTransport* JsepTransportCollection::GetTransportByName(
const std::string& transport_name) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
auto it = jsep_transports_by_name_.find(transport_name);
return (it == jsep_transports_by_name_.end()) ? nullptr : it->second.get();
}
cricket::JsepTransport* JsepTransportCollection::GetTransportForMid(
const std::string& mid) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
auto it = mid_to_transport_.find(mid);
return it == mid_to_transport_.end() ? nullptr : it->second;
}
const cricket::JsepTransport* JsepTransportCollection::GetTransportForMid(
const std::string& mid) const {
RTC_DCHECK_RUN_ON(&sequence_checker_);
auto it = mid_to_transport_.find(mid);
return it == mid_to_transport_.end() ? nullptr : it->second;
}
bool JsepTransportCollection::SetTransportForMid(
const std::string& mid,
cricket::JsepTransport* jsep_transport) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
RTC_DCHECK(jsep_transport);
auto it = mid_to_transport_.find(mid);
if (it != mid_to_transport_.end() && it->second == jsep_transport)
return true;
pending_mids_.push_back(mid);
// The map_change_callback must be called before destroying the
// transport, because it removes references to the transport
// in the RTP demuxer.
bool result = map_change_callback_(mid, jsep_transport);
if (it == mid_to_transport_.end()) {
mid_to_transport_.insert(std::make_pair(mid, jsep_transport));
} else {
auto old_transport = it->second;
it->second = jsep_transport;
MaybeDestroyJsepTransport(old_transport);
}
RTC_DCHECK(IsConsistent());
return result;
}
void JsepTransportCollection::RemoveTransportForMid(const std::string& mid) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
RTC_DCHECK(IsConsistent());
bool ret = map_change_callback_(mid, nullptr);
// Calling OnTransportChanged with nullptr should always succeed, since it is
// only expected to fail when adding media to a transport (not removing).
RTC_DCHECK(ret);
auto old_transport = GetTransportForMid(mid);
if (old_transport) {
mid_to_transport_.erase(mid);
MaybeDestroyJsepTransport(old_transport);
}
RTC_DCHECK(IsConsistent());
}
void JsepTransportCollection::RollbackTransports() {
RTC_DCHECK_RUN_ON(&sequence_checker_);
for (auto&& mid : pending_mids_) {
RemoveTransportForMid(mid);
}
pending_mids_.clear();
}
void JsepTransportCollection::CommitTransports() {
RTC_DCHECK_RUN_ON(&sequence_checker_);
pending_mids_.clear();
}
bool JsepTransportCollection::TransportInUse(
cricket::JsepTransport* jsep_transport) const {
RTC_DCHECK_RUN_ON(&sequence_checker_);
for (const auto& kv : mid_to_transport_) {
if (kv.second == jsep_transport) {
return true;
}
}
return false;
}
void JsepTransportCollection::MaybeDestroyJsepTransport(
cricket::JsepTransport* transport) {
RTC_DCHECK_RUN_ON(&sequence_checker_);
// Don't destroy the JsepTransport if there are still media sections referring
// to it.
if (TransportInUse(transport)) {
return;
}
for (const auto& it : jsep_transports_by_name_) {
if (it.second.get() == transport) {
jsep_transports_by_name_.erase(it.first);
state_change_callback_();
break;
}
}
RTC_DCHECK(IsConsistent());
}
bool JsepTransportCollection::IsConsistent() {
RTC_DCHECK_RUN_ON(&sequence_checker_);
for (const auto& it : jsep_transports_by_name_) {
if (!TransportInUse(it.second.get())) {
RTC_LOG(LS_ERROR) << "Transport registered with mid " << it.first
<< " is not in use, transport " << it.second.get();
return false;
}
const auto& lookup = mid_to_transport_.find(it.first);
if (lookup->second != it.second.get()) {
// Not an error, but unusual.
RTC_DLOG(LS_INFO) << "Note: Mid " << it.first << " was registered to "
<< it.second.get() << " but currently maps to "
<< lookup->second;
}
}
return true;
}
} // namespace webrtc