Source/WebKit/WebProcess/GPU/media/RemoteLegacyCDMFactory.cpp

/*
 * Copyright (C) 2020 Apple Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions
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#include "config.h"
#include "RemoteLegacyCDMFactory.h"

#if ENABLE(GPU_PROCESS) && ENABLE(LEGACY_ENCRYPTED_MEDIA)

#include "GPUProcessConnection.h"
#include "MediaPlayerPrivateRemote.h"
#include "RemoteLegacyCDM.h"
#include "RemoteLegacyCDMFactoryProxyMessages.h"
#include "RemoteLegacyCDMSession.h"
#include "WebProcess.h"
#include <WebCore/LegacyCDM.h>
#include <WebCore/Settings.h>

namespace WebKit {

using namespace WebCore;

RemoteLegacyCDMFactory::RemoteLegacyCDMFactory(WebProcess& process)
    : m_process(process)
{
}

RemoteLegacyCDMFactory::~RemoteLegacyCDMFactory() = default;

void RemoteLegacyCDMFactory::registerFactory()
{
    LegacyCDM::clearFactories();
    LegacyCDM::registerCDMFactory(
        [weakThis = makeWeakPtr(this)] (LegacyCDM* privateCDM) -> std::unique_ptr<WebCore::CDMPrivateInterface> {
            if (weakThis)
                return weakThis->createCDM(privateCDM);
            return nullptr;
        },
        [weakThis = makeWeakPtr(this)] (const String& keySystem) {
            return weakThis ? weakThis->supportsKeySystem(keySystem) : false;
        },
        [weakThis = makeWeakPtr(this)] (const String& keySystem, const String& mimeType) {
            return weakThis ? weakThis->supportsKeySystemAndMimeType(keySystem, mimeType) : false;
        }
    );
}

const char* RemoteLegacyCDMFactory::supplementName()
{
    return "RemoteLegacyCDMFactory";
}

GPUProcessConnection& RemoteLegacyCDMFactory::gpuProcessConnection()
{
    return m_process.ensureGPUProcessConnection();
}

bool RemoteLegacyCDMFactory::supportsKeySystem(const String& keySystem)
{
    auto foundInCache = m_supportsKeySystemCache.find(keySystem);
    if (foundInCache != m_supportsKeySystemCache.end())
        return foundInCache->value;

    bool supported = false;
    gpuProcessConnection().connection().sendSync(Messages::RemoteLegacyCDMFactoryProxy::SupportsKeySystem(keySystem, WTF::nullopt), Messages::RemoteLegacyCDMFactoryProxy::SupportsKeySystem::Reply(supported), { });
    m_supportsKeySystemCache.set(keySystem, supported);
    return supported;
}

bool RemoteLegacyCDMFactory::supportsKeySystemAndMimeType(const String& keySystem, const String& mimeType)
{
    auto key = std::make_pair(keySystem, mimeType);
    auto foundInCache = m_supportsKeySystemAndMimeTypeCache.find(key);
    if (foundInCache != m_supportsKeySystemAndMimeTypeCache.end())
        return foundInCache->value;

    bool supported = false;
    gpuProcessConnection().connection().sendSync(Messages::RemoteLegacyCDMFactoryProxy::SupportsKeySystem(keySystem, mimeType), Messages::RemoteLegacyCDMFactoryProxy::SupportsKeySystem::Reply(supported), { });
    m_supportsKeySystemAndMimeTypeCache.set(key, supported);
    return supported;
}

std::unique_ptr<CDMPrivateInterface> RemoteLegacyCDMFactory::createCDM(WebCore::LegacyCDM* cdm)
{
    if (!cdm) {
        ASSERT_NOT_REACHED();
        return nullptr;
    }

    Optional<MediaPlayerPrivateRemoteIdentifier> playerId;
    if (auto player = cdm->mediaPlayer())
        playerId = gpuProcessConnection().mediaPlayerManager().findRemotePlayerId(player->playerPrivate());

    RemoteLegacyCDMIdentifier id;
    gpuProcessConnection().connection().sendSync(Messages::RemoteLegacyCDMFactoryProxy::CreateCDM(cdm->keySystem(), WTFMove(playerId)), Messages::RemoteLegacyCDMFactoryProxy::CreateCDM::Reply(id), { });
    if (!id)
        return nullptr;
    auto remoteCDM = RemoteLegacyCDM::create(makeWeakPtr(this), id);
    m_cdms.set(id, makeWeakPtr(remoteCDM.get()));
    return remoteCDM;
}

void RemoteLegacyCDMFactory::addSession(RemoteLegacyCDMSessionIdentifier id, std::unique_ptr<RemoteLegacyCDMSession>&& session)
{
    ASSERT(!m_sessions.contains(id));
    m_sessions.set(id, WTFMove(session));
}

void RemoteLegacyCDMFactory::removeSession(RemoteLegacyCDMSessionIdentifier id)
{
    ASSERT(m_sessions.contains(id));
    m_sessions.remove(id);
}

RemoteLegacyCDM* RemoteLegacyCDMFactory::findCDM(CDMPrivateInterface* privateInterface) const
{
    for (auto& cdm : m_cdms.values()) {
        if (privateInterface == cdm.get())
            return cdm.get();
    }
    return nullptr;
}

void RemoteLegacyCDMFactory::didReceiveSessionMessage(IPC::Connection& connection, IPC::Decoder& decoder)
{
    if (auto* session = m_sessions.get(makeObjectIdentifier<RemoteLegacyCDMSessionIdentifierType>(decoder.destinationID())))
        session->didReceiveMessage(connection, decoder);
}


}

#endif