WebRtcMediaStreamTrackMap added

content/renderer/media/webrtc/webrtc_media_stream_track_adapter_map.cc

+// Copyright (c) 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/renderer/media/webrtc/webrtc_media_stream_track_adapter_map.h"
+
+#include <utility>
+
+#include "content/renderer/media/webrtc/peer_connection_dependency_factory.h"
+
+namespace content {
+
+WebRtcMediaStreamTrackAdapterMap::AdapterEntry::AdapterEntry(
+    const scoped_refptr<WebRtcMediaStreamTrackAdapter>& adapter)
+    : adapter(adapter) {}
+
+WebRtcMediaStreamTrackAdapterMap::AdapterEntry::AdapterEntry(
+    AdapterEntry&& other)
+    : adapter(other.adapter) {
+  other.adapter = nullptr;
+}
+
+WebRtcMediaStreamTrackAdapterMap::AdapterEntry::~AdapterEntry() {
+  DCHECK(!adapter || !adapter->is_initialized());
+}
+
+WebRtcMediaStreamTrackAdapterMap::AdapterRef::AdapterRef(
+    const scoped_refptr<WebRtcMediaStreamTrackAdapterMap>& map,
+    Type type,
+    const MapEntryIterator& it)
+    : map_(map), type_(type), it_(it), adapter_(entry()->adapter) {
+  DCHECK(map_);
+  DCHECK(adapter_);
+}
+
+WebRtcMediaStreamTrackAdapterMap::AdapterRef::~AdapterRef() {
+  DCHECK(map_->main_thread_->BelongsToCurrentThread());
+  base::AutoLock scoped_lock(map_->lock_);
+  adapter_ = nullptr;
+  if (entry()->adapter->HasOneRef()) {
+    entry()->adapter->Dispose();
+    if (type_ == Type::kLocal)
+      map_->local_track_adapters_.erase(it_);
+    else
+      map_->remote_track_adapters_.erase(it_);
+  }
+}
+
+WebRtcMediaStreamTrackAdapterMap::WebRtcMediaStreamTrackAdapterMap(
+    PeerConnectionDependencyFactory* const factory,
+    const scoped_refptr<base::SingleThreadTaskRunner>& main_thread)
+    : factory_(factory), main_thread_(main_thread) {
+  DCHECK(factory_);
+  DCHECK(main_thread_);
+}
+
+WebRtcMediaStreamTrackAdapterMap::~WebRtcMediaStreamTrackAdapterMap() {
+  DCHECK(local_track_adapters_.empty());
+  DCHECK(remote_track_adapters_.empty());
+}
+
+std::unique_ptr<WebRtcMediaStreamTrackAdapterMap::AdapterRef>
+WebRtcMediaStreamTrackAdapterMap::GetLocalTrackAdapter(const std::string& id) {
+  return GetTrackAdapter(AdapterRef::Type::kLocal, id);
+}
+
+std::unique_ptr<WebRtcMediaStreamTrackAdapterMap::AdapterRef>
+WebRtcMediaStreamTrackAdapterMap::GetOrCreateLocalTrackAdapter(
+    const blink::WebMediaStreamTrack& web_track) {
+  DCHECK(!web_track.IsNull());
+  DCHECK(main_thread_->BelongsToCurrentThread());
+  return GetOrCreateTrackAdapter(
+      AdapterRef::Type::kLocal,
+      base::Bind(&WebRtcMediaStreamTrackAdapter::CreateLocalTrackAdapter,
+                 factory_, main_thread_, web_track),
+      web_track.Id().Utf8());
+}
+
+size_t WebRtcMediaStreamTrackAdapterMap::GetLocalTrackCount() const {
+  base::AutoLock scoped_lock(lock_);
+  return local_track_adapters_.size();
+}
+
+std::unique_ptr<WebRtcMediaStreamTrackAdapterMap::AdapterRef>
+WebRtcMediaStreamTrackAdapterMap::GetRemoteTrackAdapter(const std::string& id) {
+  return GetTrackAdapter(AdapterRef::Type::kRemote, id);
+}
+
+std::unique_ptr<WebRtcMediaStreamTrackAdapterMap::AdapterRef>
+WebRtcMediaStreamTrackAdapterMap::GetOrCreateRemoteTrackAdapter(
+    webrtc::MediaStreamTrackInterface* webrtc_track) {
+  DCHECK(webrtc_track);
+  DCHECK(factory_->GetWebRtcSignalingThread()->BelongsToCurrentThread());
+  return GetOrCreateTrackAdapter(
+      AdapterRef::Type::kRemote,
+      base::Bind(&WebRtcMediaStreamTrackAdapter::CreateRemoteTrackAdapter,
+                 factory_, main_thread_, webrtc_track),
+      webrtc_track->id());
+}
+
+size_t WebRtcMediaStreamTrackAdapterMap::GetRemoteTrackCount() const {
+  base::AutoLock scoped_lock(lock_);
+  return remote_track_adapters_.size();
+}
+
+std::unique_ptr<WebRtcMediaStreamTrackAdapterMap::AdapterRef>
+WebRtcMediaStreamTrackAdapterMap::GetTrackAdapter(
+    WebRtcMediaStreamTrackAdapterMap::AdapterRef::Type type,
+    const std::string& id) {
+  std::map<std::string, AdapterEntry>* track_adapters =
+      type == AdapterRef::Type::kLocal ? &local_track_adapters_
+                                       : &remote_track_adapters_;
+  base::AutoLock scoped_lock(lock_);
+  auto it = track_adapters->find(id);
+  if (it == track_adapters->end())
+    return nullptr;
+  return base::WrapUnique(new AdapterRef(this, type, it));
+}
+
+std::unique_ptr<WebRtcMediaStreamTrackAdapterMap::AdapterRef>
+WebRtcMediaStreamTrackAdapterMap::GetOrCreateTrackAdapter(
+    AdapterRef::Type type,
+    base::Callback<scoped_refptr<WebRtcMediaStreamTrackAdapter>()>
+        create_adapter_callback,
+    const std::string& id) {
+  std::map<std::string, AdapterEntry>* track_adapters =
+      type == AdapterRef::Type::kLocal ? &local_track_adapters_
+                                       : &remote_track_adapters_;
+  base::AutoLock scoped_lock(lock_);
+  auto it = track_adapters->find(id);
+  if (it == track_adapters->end()) {
+    scoped_refptr<WebRtcMediaStreamTrackAdapter> adapter =
+        create_adapter_callback.Run();
+    it =
+        track_adapters->insert(std::make_pair(id, AdapterEntry(adapter))).first;
+  }
+  return base::WrapUnique(new AdapterRef(this, type, it));
+}
+
+}  // namespace content