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/*
* Copyright (C) 2013 Nokia Corporation and/or its subsidiary(-ies).
* Copyright (C) 2015 Ericsson AB. 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 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.
*/
#include "config.h"
#include "MediaStreamTrackPrivate.h"
#if ENABLE(MEDIA_STREAM)
#include "AudioSourceProvider.h"
#include "GraphicsContext.h"
#include "IntRect.h"
#include "MediaSourceSettings.h"
#include "UUID.h"
#include <wtf/NeverDestroyed.h>
namespace WebCore {
RefPtr<MediaStreamTrackPrivate> MediaStreamTrackPrivate::create(RefPtr<RealtimeMediaSource>&& source)
{
return adoptRef(new MediaStreamTrackPrivate(WTFMove(source), createCanonicalUUIDString()));
}
RefPtr<MediaStreamTrackPrivate> MediaStreamTrackPrivate::create(RefPtr<RealtimeMediaSource>&& source, const String& id)
{
return adoptRef(new MediaStreamTrackPrivate(WTFMove(source), id));
}
MediaStreamTrackPrivate::MediaStreamTrackPrivate(const MediaStreamTrackPrivate& other)
: RefCounted()
, m_source(&other.source())
, m_id(createCanonicalUUIDString())
, m_isEnabled(other.enabled())
, m_isEnded(other.ended())
{
m_source->addObserver(this);
}
MediaStreamTrackPrivate::MediaStreamTrackPrivate(RefPtr<RealtimeMediaSource>&& source, const String& id)
: RefCounted()
, m_source(source)
, m_id(id)
, m_isEnabled(true)
, m_isEnded(false)
{
m_source->addObserver(this);
}
MediaStreamTrackPrivate::~MediaStreamTrackPrivate()
{
m_source->removeObserver(this);
}
void MediaStreamTrackPrivate::addObserver(MediaStreamTrackPrivate::Observer& observer)
{
m_observers.append(&observer);
}
void MediaStreamTrackPrivate::removeObserver(MediaStreamTrackPrivate::Observer& observer)
{
size_t pos = m_observers.find(&observer);
if (pos != notFound)
m_observers.remove(pos);
}
const String& MediaStreamTrackPrivate::label() const
{
return m_source->name();
}
bool MediaStreamTrackPrivate::muted() const
{
return m_source->muted();
}
bool MediaStreamTrackPrivate::readonly() const
{
return m_source->readonly();
}
bool MediaStreamTrackPrivate::remote() const
{
return m_source->remote();
}
void MediaStreamTrackPrivate::setEnabled(bool enabled)
{
if (m_isEnabled == enabled)
return;
// Always update the enabled state regardless of the track being ended.
m_isEnabled = enabled;
for (auto& observer : m_observers)
observer->trackEnabledChanged(*this);
}
void MediaStreamTrackPrivate::endTrack()
{
if (m_isEnded)
return;
// Set m_isEnded to true before telling the source it can stop, so if this is the
// only track using the source and it does stop, we will only call each observer's
// trackEnded method once.
m_isEnded = true;
m_source->requestStop(this);
for (auto& observer : m_observers)
observer->trackEnded(*this);
}
RefPtr<MediaStreamTrackPrivate> MediaStreamTrackPrivate::clone()
{
return adoptRef(new MediaStreamTrackPrivate(*this));
}
RealtimeMediaSource::Type MediaStreamTrackPrivate::type() const
{
return m_source->type();
}
RefPtr<MediaConstraints> MediaStreamTrackPrivate::constraints() const
{
return m_constraints;
}
const RealtimeMediaSourceSettings& MediaStreamTrackPrivate::settings() const
{
return m_source->settings();
}
RefPtr<RealtimeMediaSourceCapabilities> MediaStreamTrackPrivate::capabilities() const
{
return m_source->capabilities();
}
void MediaStreamTrackPrivate::paintCurrentFrameInContext(GraphicsContext& context, const FloatRect& rect)
{
if (context.paintingDisabled() || m_source->type() != RealtimeMediaSource::Type::Video || ended())
return;
if (!m_source->muted())
m_source->paintCurrentFrameInContext(context, rect);
else {
GraphicsContextStateSaver stateSaver(context);
context.translate(rect.x(), rect.y() + rect.height());
IntRect paintRect(IntPoint(0, 0), IntSize(rect.width(), rect.height()));
context.fillRect(paintRect, Color::black);
}
}
void MediaStreamTrackPrivate::applyConstraints(const MediaConstraints&)
{
// FIXME: apply the new constraints to the track
// https://bugs.webkit.org/show_bug.cgi?id=122428
}
AudioSourceProvider* MediaStreamTrackPrivate::audioSourceProvider()
{
return m_source->audioSourceProvider();
}
void MediaStreamTrackPrivate::sourceStopped()
{
if (m_isEnded)
return;
m_isEnded = true;
for (auto& observer : m_observers)
observer->trackEnded(*this);
}
void MediaStreamTrackPrivate::sourceMutedChanged()
{
for (auto& observer : m_observers)
observer->trackMutedChanged(*this);
}
void MediaStreamTrackPrivate::sourceSettingsChanged()
{
for (auto& observer : m_observers)
observer->trackSettingsChanged(*this);
}
bool MediaStreamTrackPrivate::preventSourceFromStopping()
{
// Do not allow the source to stop if we are still using it.
return !m_isEnded;
}
} // namespace WebCore
#endif // ENABLE(MEDIA_STREAM)
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