Source/WebCore/platform/mediastream/MediaStreamDescriptor.h

/*
 * Copyright (C) 2011 Ericsson AB. All rights reserved.
 * 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.
 * 3. Neither the name of Ericsson nor the names of its contributors
 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER OR 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.
 */

#ifndef MediaStreamDescriptor_h
#define MediaStreamDescriptor_h

#if ENABLE(MEDIA_STREAM)

#include "MediaStreamComponent.h"
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>

namespace WebCore {

class MediaStreamDescriptorClient {
public:
    virtual ~MediaStreamDescriptorClient() { }

    virtual void streamEnded() = 0;
    virtual void addRemoteTrack(MediaStreamComponent*) = 0;
    virtual void removeRemoteTrack(MediaStreamComponent*) = 0;
};

class MediaStreamDescriptor : public RefCounted<MediaStreamDescriptor> {
public:
    class ExtraData : public RefCounted<ExtraData> {
    public:
        virtual ~ExtraData() { }
    };

    static PassRefPtr<MediaStreamDescriptor> create(const String& id, const MediaStreamSourceVector& audioSources, const MediaStreamSourceVector& videoSources)
    {
        return adoptRef(new MediaStreamDescriptor(id, audioSources, videoSources));
    }

    static PassRefPtr<MediaStreamDescriptor> create(const String& id, const MediaStreamComponentVector& audioComponents, const MediaStreamComponentVector& videoComponents)
    {
        return adoptRef(new MediaStreamDescriptor(id, audioComponents, videoComponents));
    }

    MediaStreamDescriptorClient* client() const { return m_client; }
    void setClient(MediaStreamDescriptorClient* client) { m_client = client; }

    String id() const { return m_id; }

    unsigned numberOfAudioComponents() const { return m_audioComponents.size(); }
    MediaStreamComponent* audioComponent(unsigned index) const { return m_audioComponents[index].get(); }
    void addAudioComponent(PassRefPtr<MediaStreamComponent> component) { m_audioComponents.append(component); }
    void removeAudioComponent(MediaStreamComponent* component)
    {
        size_t pos = m_audioComponents.find(component);
        if (pos != notFound)
            m_audioComponents.remove(pos);
    }

    unsigned numberOfVideoComponents() const { return m_videoComponents.size(); }
    MediaStreamComponent* videoComponent(unsigned index) const { return m_videoComponents[index].get(); }
    void addVideoComponent(PassRefPtr<MediaStreamComponent> component) { m_videoComponents.append(component); }
    void removeVideoComponent(MediaStreamComponent* component)
    {
        size_t pos = m_audioComponents.find(component);
        if (pos != notFound)
            m_audioComponents.remove(pos);
    }

    bool ended() const { return m_ended; }
    void setEnded() { m_ended = true; }

    PassRefPtr<ExtraData> extraData() const { return m_extraData; }
    void setExtraData(PassRefPtr<ExtraData> extraData) { m_extraData = extraData; }

private:
    MediaStreamDescriptor(const String& id, const MediaStreamSourceVector& audioSources, const MediaStreamSourceVector& videoSources)
        : m_client(0)
        , m_id(id)
        , m_ended(false)
    {
        ASSERT(m_id.length());
        for (size_t i = 0; i < audioSources.size(); i++)
            m_audioComponents.append(MediaStreamComponent::create(this, audioSources[i]));

        for (size_t i = 0; i < videoSources.size(); i++)
            m_videoComponents.append(MediaStreamComponent::create(this, videoSources[i]));

        if (!audioSources.size() && !videoSources.size())
            m_ended = true;
    }

    MediaStreamDescriptor(const String& id, const MediaStreamComponentVector& audioComponents, const MediaStreamComponentVector& videoComponents)
        : m_client(0)
        , m_id(id)
        , m_ended(false)
    {
        ASSERT(m_id.length());
        for (MediaStreamComponentVector::const_iterator iter = audioComponents.begin(); iter != audioComponents.end(); ++iter) {
            (*iter)->setStream(this);
            m_audioComponents.append((*iter));
        }
        for (MediaStreamComponentVector::const_iterator iter = videoComponents.begin(); iter != videoComponents.end(); ++iter) {
            (*iter)->setStream(this);
            m_videoComponents.append((*iter));
        }
    }

    MediaStreamDescriptorClient* m_client;
    String m_id;
    Vector<RefPtr<MediaStreamComponent> > m_audioComponents;
    Vector<RefPtr<MediaStreamComponent> > m_videoComponents;
    bool m_ended;

    RefPtr<ExtraData> m_extraData;
};

typedef Vector<RefPtr<MediaStreamDescriptor> > MediaStreamDescriptorVector;

} // namespace WebCore

#endif // ENABLE(MEDIA_STREAM)

#endif // MediaStreamDescriptor_h