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/*
* Copyright (C) 2017-2020 Apple 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, 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 "TrackPrivateBase.h"
#include <wtf/SharedTask.h>
#include <wtf/TZoneMallocInlines.h>
#if ENABLE(VIDEO)
#include "Logging.h"
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(TrackPrivateBase);
std::optional<AtomString> TrackPrivateBase::trackUID() const
{
return std::nullopt;
}
std::optional<bool> TrackPrivateBase::defaultEnabled() const
{
return std::nullopt;
}
bool TrackPrivateBase::operator==(const TrackPrivateBase& track) const
{
return id() == track.id()
&& label() == track.label()
&& language() == track.language()
&& trackIndex() == track.trackIndex()
&& trackUID() == track.trackUID()
&& defaultEnabled() == track.defaultEnabled()
&& startTimeVariance() == track.startTimeVariance();
}
void TrackPrivateBase::notifyClients(Task&& task)
{
Ref sharedTask = createSharedTask<void(TrackPrivateBaseClient&)>(WTFMove(task));
// We ensure not to hold the lock for too long by making a copy (which are cheap)
// as we could potentially get a re-entrant call which would cause a deadlock.
Vector<ClientRecord> clients;
{
Locker locker { m_lock };
clients = m_clients;
}
for (auto& tuple : clients) {
auto& [dispatcher, weakClient, mainThread] = tuple;
if (dispatcher) {
dispatcher->get()([weakClient = WTFMove(weakClient), sharedTask] {
if (weakClient)
sharedTask->run(*weakClient);
});
}
}
}
void TrackPrivateBase::notifyMainThreadClient(Task&& task)
{
// There will only ever be one main thread client.
// We call the first one found.
Vector<ClientRecord> clients;
{
Locker locker { m_lock };
clients = m_clients;
}
for (auto& tuple : clients) {
auto& [dispatcher, weakClient, isMainThread] = tuple;
if (dispatcher && isMainThread) {
dispatcher->get()([weakClient = WTFMove(weakClient), task = WTFMove(task)] {
if (weakClient)
task(*weakClient);
});
break;
}
}
}
size_t TrackPrivateBase::addClient(TrackPrivateBaseClient::Dispatcher&& dispatcher, TrackPrivateBaseClient& client)
{
Locker locker { m_lock };
size_t index = m_clients.size();
m_clients.append(std::make_tuple(SharedDispatcher::create(WTFMove(dispatcher)), WeakPtr { client }, isMainThread()));
return index;
}
void TrackPrivateBase::removeClient(uint32_t index)
{
Locker locker { m_lock };
if (m_clients.size() > index)
return;
m_clients[index] = std::make_tuple<RefPtr<SharedDispatcher>, WeakPtr<TrackPrivateBaseClient>, bool>({ }, { }, false);
}
bool TrackPrivateBase::hasClients() const
{
Locker locker { m_lock };
return m_clients.size();
}
bool TrackPrivateBase::hasOneClient() const
{
Locker locker { m_lock };
return m_clients.size() == 1;
}
#if !RELEASE_LOG_DISABLED
static uint64_t s_uniqueId = 0;
void TrackPrivateBase::setLogger(const Logger& logger, uint64_t logIdentifier)
{
m_logger = &logger;
m_logIdentifier = childLogIdentifier(logIdentifier, ++s_uniqueId);
}
WTFLogChannel& TrackPrivateBase::logChannel() const
{
return LogMedia;
}
#endif
} // namespace WebCore
#endif
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