Making DesktopEnvironment a factory class used by ClientSession to create audio/video capturers and…

remoting/host/local_desktop_environment.cc

+// Copyright (c) 2012 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 "remoting/host/local_desktop_environment.h"
+
+#include "base/logging.h"
+#include "base/single_thread_task_runner.h"
+#include "remoting/capturer/video_frame_capturer.h"
+#include "remoting/host/audio_capturer.h"
+#include "remoting/host/event_executor.h"
+
+namespace remoting {
+
+LocalDesktopEnvironment::LocalDesktopEnvironment(
+    scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
+    const CreateEventExecutorCallback& create_event_executor_callback)
+    : caller_task_runner_(caller_task_runner),
+      create_event_executor_callback_(create_event_executor_callback),
+      audio_capturer_created_(false),
+      video_capturer_created_(false) {
+  DCHECK(caller_task_runner_->BelongsToCurrentThread());
+}
+
+LocalDesktopEnvironment::~LocalDesktopEnvironment() {
+  DCHECK(caller_task_runner_->BelongsToCurrentThread());
+}
+
+scoped_ptr<AudioCapturer> LocalDesktopEnvironment::CreateAudioCapturer(
+    scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner) {
+  DCHECK(caller_task_runner_->BelongsToCurrentThread());
+
+  scoped_ptr<AudioCapturer> audio_capturer;
+  if (!audio_capturer_created_) {
+    audio_capturer = AudioCapturer::Create();
+    audio_capturer_created_ = true;
+  }
+
+  return audio_capturer.Pass();
+}
+
+scoped_ptr<EventExecutor> LocalDesktopEnvironment::CreateEventExecutor(
+    scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner) {
+  DCHECK(caller_task_runner_->BelongsToCurrentThread());
+
+  scoped_ptr<EventExecutor> event_executor =
+      create_event_executor_callback_.Run(input_task_runner, ui_task_runner);
+  create_event_executor_callback_.Reset();
+  return event_executor.Pass();
+}
+
+scoped_ptr<VideoFrameCapturer> LocalDesktopEnvironment::CreateVideoCapturer(
+    scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner) {
+  DCHECK(caller_task_runner_->BelongsToCurrentThread());
+
+  scoped_ptr<VideoFrameCapturer> video_capturer;
+  if (!video_capturer_created_) {
+    video_capturer = VideoFrameCapturer::Create();
+    video_capturer_created_ = true;
+  }
+
+  return video_capturer.Pass();
+}
+
+}  // namespace remoting