Source/WebCore/html/track/AudioTrack.cpp

/*
 * Copyright (C) 2011 Google Inc. All rights reserved.
 * Copyright (C) 2011-2020 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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#include "config.h"
#include "AudioTrack.h"

#if ENABLE(VIDEO)

#include "AudioTrackClient.h"
#include "AudioTrackList.h"
#include "AudioTrackPrivate.h"
#include <wtf/NeverDestroyed.h>

namespace WebCore {

const AtomString& AudioTrack::alternativeKeyword()
{
    static MainThreadNeverDestroyed<const AtomString> alternative("alternative", AtomString::ConstructFromLiteral);
    return alternative;
}

const AtomString& AudioTrack::descriptionKeyword()
{
    static MainThreadNeverDestroyed<const AtomString> description("description", AtomString::ConstructFromLiteral);
    return description;
}

const AtomString& AudioTrack::mainKeyword()
{
    static MainThreadNeverDestroyed<const AtomString> main("main", AtomString::ConstructFromLiteral);
    return main;
}

const AtomString& AudioTrack::mainDescKeyword()
{
    static MainThreadNeverDestroyed<const AtomString> mainDesc("main-desc", AtomString::ConstructFromLiteral);
    return mainDesc;
}

const AtomString& AudioTrack::translationKeyword()
{
    static MainThreadNeverDestroyed<const AtomString> translation("translation", AtomString::ConstructFromLiteral);
    return translation;
}

const AtomString& AudioTrack::commentaryKeyword()
{
    static MainThreadNeverDestroyed<const AtomString> commentary("commentary", AtomString::ConstructFromLiteral);
    return commentary;
}

AudioTrack::AudioTrack(ScriptExecutionContext* context, AudioTrackPrivate& trackPrivate)
    : MediaTrackBase(context, MediaTrackBase::AudioTrack, trackPrivate.id(), trackPrivate.label(), trackPrivate.language())
    , m_private(trackPrivate)
    , m_enabled(trackPrivate.enabled())
{
    m_private->setClient(*this);
    updateKindFromPrivate();
}

AudioTrack::~AudioTrack()
{
    m_private->clearClient();
}

void AudioTrack::setPrivate(AudioTrackPrivate& trackPrivate)
{
    if (m_private.ptr() == &trackPrivate)
        return;

    m_private->clearClient();
    m_private = trackPrivate;
    m_private->setEnabled(m_enabled);
    m_private->setClient(*this);
#if !RELEASE_LOG_DISABLED
    m_private->setLogger(logger(), logIdentifier());
#endif

    updateKindFromPrivate();
    setId(m_private->id());
}

void AudioTrack::setLanguage(const AtomString& language)
{
    TrackBase::setLanguage(language);

    m_clients.forEach([&] (auto& client) {
        client.audioTrackLanguageChanged(*this);
    });
}

bool AudioTrack::isValidKind(const AtomString& value) const
{
    return value == alternativeKeyword()
        || value == commentaryKeyword()
        || value == descriptionKeyword()
        || value == mainKeyword()
        || value == mainDescKeyword()
        || value == translationKeyword();
}

void AudioTrack::setEnabled(bool enabled)
{
    if (m_enabled == enabled)
        return;

    m_private->setEnabled(enabled);
    m_clients.forEach([this] (auto& client) {
        client.audioTrackEnabledChanged(*this);
    });
}

void AudioTrack::addClient(AudioTrackClient& client)
{
    ASSERT(!m_clients.contains(client));
    m_clients.add(client);
}

void AudioTrack::clearClient(AudioTrackClient& client)
{
    ASSERT(m_clients.contains(client));
    m_clients.remove(client);
}

size_t AudioTrack::inbandTrackIndex() const
{
    return m_private->trackIndex();
}

void AudioTrack::enabledChanged(bool enabled)
{
    if (m_enabled == enabled)
        return;

    m_enabled = enabled;

    m_clients.forEach([this] (auto& client) {
        client.audioTrackEnabledChanged(*this);
    });
}

void AudioTrack::idChanged(const AtomString& id)
{
    setId(id);
    m_clients.forEach([this] (auto& client) {
        client.audioTrackIdChanged(*this);
    });
}

void AudioTrack::labelChanged(const AtomString& label)
{
    setLabel(label);
    m_clients.forEach([this] (auto& client) {
        client.audioTrackLabelChanged(*this);
    });
}

void AudioTrack::languageChanged(const AtomString& language)
{
    setLanguage(language);
}

void AudioTrack::willRemove()
{
    m_clients.forEach([this] (auto& client) {
        client.willRemoveAudioTrack(*this);
    });
}

void AudioTrack::updateKindFromPrivate()
{
    switch (m_private->kind()) {
    case AudioTrackPrivate::Alternative:
        setKind(AudioTrack::alternativeKeyword());
        break;
    case AudioTrackPrivate::Description:
        setKind(AudioTrack::descriptionKeyword());
        break;
    case AudioTrackPrivate::Main:
        setKind(AudioTrack::mainKeyword());
        break;
    case AudioTrackPrivate::MainDesc:
        setKind(AudioTrack::mainDescKeyword());
        break;
    case AudioTrackPrivate::Translation:
        setKind(AudioTrack::translationKeyword());
        break;
    case AudioTrackPrivate::Commentary:
        setKind(AudioTrack::commentaryKeyword());
        break;
    case AudioTrackPrivate::None:
        setKind(emptyString());
        break;
    default:
        ASSERT_NOT_REACHED();
        break;
    }
}

#if !RELEASE_LOG_DISABLED
void AudioTrack::setLogger(const Logger& logger, const void* logIdentifier)
{
    TrackBase::setLogger(logger, logIdentifier);
    m_private->setLogger(logger, this->logIdentifier());
}
#endif

} // namespace WebCore

#endif