third_party/blink/renderer/modules/mediastream/user_media_controller.cc

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1.  Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 * 2.  Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "third_party/blink/renderer/modules/mediastream/user_media_controller.h"
#include "third_party/blink/renderer/core/dom/document.h"

namespace blink {

const char UserMediaController::kSupplementName[] = "UserMediaController";

UserMediaController::UserMediaController(LocalFrame& frame)
    : Supplement<LocalFrame>(frame),
      ExecutionContextLifecycleObserver(frame.GetDocument()) {}

void UserMediaController::Trace(Visitor* visitor) {
  Supplement<LocalFrame>::Trace(visitor);
  ExecutionContextLifecycleObserver::Trace(visitor);
  visitor->Trace(client_);
}

UserMediaClient* UserMediaController::Client() {
  if (!client_) {
    client_ = MakeGarbageCollected<UserMediaClient>(
        GetFrame(), GetFrame()->GetTaskRunner(TaskType::kInternalMedia));
  }

  return client_;
}

void UserMediaController::ContextDestroyed() {
  if (!client_)
    return;
  client_->ContextDestroyed();
}

void ProvideUserMediaTo(LocalFrame& frame) {
  UserMediaController::ProvideTo(
      frame, MakeGarbageCollected<UserMediaController>(frame));
}

}  // namespace blink