third_party/WebKit/Source/platform/exported/WebMediaStream.cpp

/*
 * Copyright (C) 2013 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,
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "public/platform/WebMediaStream.h"

#include "platform/UUID.h"
#include "platform/mediastream/MediaStreamComponent.h"
#include "platform/mediastream/MediaStreamDescriptor.h"
#include "platform/mediastream/MediaStreamSource.h"
#include "public/platform/WebMediaStreamSource.h"
#include "public/platform/WebMediaStreamTrack.h"
#include "public/platform/WebString.h"
#include "wtf/PtrUtil.h"
#include "wtf/Vector.h"
#include <memory>

namespace blink {

namespace {

class ExtraDataContainer : public MediaStreamDescriptor::ExtraData {
 public:
  ExtraDataContainer(std::unique_ptr<WebMediaStream::ExtraData> extraData)
      : m_extraData(std::move(extraData)) {}

  WebMediaStream::ExtraData* getExtraData() { return m_extraData.get(); }

 private:
  std::unique_ptr<WebMediaStream::ExtraData> m_extraData;
};

}  // namespace

WebMediaStream::WebMediaStream(MediaStreamDescriptor* mediaStreamDescriptor)
    : m_private(mediaStreamDescriptor) {}

void WebMediaStream::reset() {
  m_private.reset();
}

WebString WebMediaStream::id() const {
  return m_private->id();
}

WebMediaStream::ExtraData* WebMediaStream::getExtraData() const {
  MediaStreamDescriptor::ExtraData* data = m_private->getExtraData();
  if (!data)
    return 0;
  return static_cast<ExtraDataContainer*>(data)->getExtraData();
}

void WebMediaStream::setExtraData(ExtraData* extraData) {
  m_private->setExtraData(
      WTF::wrapUnique(new ExtraDataContainer(WTF::wrapUnique(extraData))));
}

void WebMediaStream::audioTracks(
    WebVector<WebMediaStreamTrack>& webTracks) const {
  size_t numberOfTracks = m_private->numberOfAudioComponents();
  WebVector<WebMediaStreamTrack> result(numberOfTracks);
  for (size_t i = 0; i < numberOfTracks; ++i)
    result[i] = m_private->audioComponent(i);
  webTracks.swap(result);
}

void WebMediaStream::videoTracks(
    WebVector<WebMediaStreamTrack>& webTracks) const {
  size_t numberOfTracks = m_private->numberOfVideoComponents();
  WebVector<WebMediaStreamTrack> result(numberOfTracks);
  for (size_t i = 0; i < numberOfTracks; ++i)
    result[i] = m_private->videoComponent(i);
  webTracks.swap(result);
}

void WebMediaStream::addTrack(const WebMediaStreamTrack& track) {
  ASSERT(!isNull());
  m_private->addRemoteTrack(track);
}

void WebMediaStream::removeTrack(const WebMediaStreamTrack& track) {
  ASSERT(!isNull());
  m_private->removeRemoteTrack(track);
}

WebMediaStream& WebMediaStream::operator=(
    MediaStreamDescriptor* mediaStreamDescriptor) {
  m_private = mediaStreamDescriptor;
  return *this;
}

WebMediaStream::operator MediaStreamDescriptor*() const {
  return m_private.get();
}

void WebMediaStream::initialize(
    const WebVector<WebMediaStreamTrack>& audioTracks,
    const WebVector<WebMediaStreamTrack>& videoTracks) {
  initialize(createCanonicalUUIDString(), audioTracks, videoTracks);
}

void WebMediaStream::initialize(
    const WebString& label,
    const WebVector<WebMediaStreamTrack>& audioTracks,
    const WebVector<WebMediaStreamTrack>& videoTracks) {
  MediaStreamComponentVector audio, video;
  for (size_t i = 0; i < audioTracks.size(); ++i) {
    MediaStreamComponent* component = audioTracks[i];
    audio.append(component);
  }
  for (size_t i = 0; i < videoTracks.size(); ++i) {
    MediaStreamComponent* component = videoTracks[i];
    video.append(component);
  }
  m_private = MediaStreamDescriptor::create(label, audio, video);
}

void WebMediaStream::assign(const WebMediaStream& other) {
  m_private = other.m_private;
}

}  // namespace blink