third_party/WebKit/Source/modules/peerconnection/RTCStatsRequestImpl.cpp

/*
 * 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 "modules/peerconnection/RTCStatsRequestImpl.h"

#include "modules/mediastream/MediaStreamTrack.h"
#include "modules/peerconnection/RTCPeerConnection.h"
#include "modules/peerconnection/RTCStatsCallback.h"

namespace blink {

RTCStatsRequestImpl* RTCStatsRequestImpl::create(ExecutionContext* context,
                                                 RTCPeerConnection* requester,
                                                 RTCStatsCallback* callback,
                                                 MediaStreamTrack* selector) {
  RTCStatsRequestImpl* request =
      new RTCStatsRequestImpl(context, requester, callback, selector);
  request->suspendIfNeeded();
  return request;
}

RTCStatsRequestImpl::RTCStatsRequestImpl(ExecutionContext* context,
                                         RTCPeerConnection* requester,
                                         RTCStatsCallback* callback,
                                         MediaStreamTrack* selector)
    : ActiveDOMObject(context),
      m_successCallback(callback),
      m_component(selector ? selector->component() : 0),
      m_requester(requester) {
  DCHECK(m_requester);
}

RTCStatsRequestImpl::~RTCStatsRequestImpl() {}

RTCStatsResponseBase* RTCStatsRequestImpl::createResponse() {
  return RTCStatsResponse::create();
}

bool RTCStatsRequestImpl::hasSelector() {
  return m_component;
}

MediaStreamComponent* RTCStatsRequestImpl::component() {
  return m_component;
}

void RTCStatsRequestImpl::requestSucceeded(RTCStatsResponseBase* response) {
  bool shouldFireCallback =
      m_requester ? m_requester->shouldFireGetStatsCallback() : false;
  if (shouldFireCallback && m_successCallback)
    m_successCallback->handleEvent(static_cast<RTCStatsResponse*>(response));
  clear();
}

void RTCStatsRequestImpl::stop() {
  clear();
}

void RTCStatsRequestImpl::clear() {
  m_successCallback.clear();
  m_requester.clear();
}

DEFINE_TRACE(RTCStatsRequestImpl) {
  visitor->trace(m_successCallback);
  visitor->trace(m_component);
  visitor->trace(m_requester);
  RTCStatsRequest::trace(visitor);
  ActiveDOMObject::trace(visitor);
}

}  // namespace blink