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/*
* Copyright (C) 2020-2025 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. ``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
* 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 "RTCRtpScriptTransformer.h"
#if ENABLE(WEB_RTC)
#include "ContextDestructionObserverInlines.h"
#include "DedicatedWorkerGlobalScope.h"
#include "EventLoop.h"
#include "JSDOMPromiseDeferred.h"
#include "MessageWithMessagePorts.h"
#include "RTCEncodedStreamProducer.h"
#include "WorkerThread.h"
namespace WebCore {
ExceptionOr<Ref<RTCRtpScriptTransformer>> RTCRtpScriptTransformer::create(ScriptExecutionContext& context, MessageWithMessagePorts&& options)
{
if (!context.globalObject())
return Exception { ExceptionCode::InvalidStateError };
auto& globalObject = *JSC::jsCast<JSDOMGlobalObject*>(context.globalObject());
JSC::JSLockHolder lock(globalObject.vm());
auto producerOrException = RTCEncodedStreamProducer::create(context);
if (producerOrException.hasException())
return producerOrException.releaseException();
if (!options.message)
return Exception { ExceptionCode::InvalidStateError };
auto ports = MessagePort::entanglePorts(context, WTFMove(options.transferredPorts));
auto transformer = adoptRef(*new RTCRtpScriptTransformer(context, options.message.releaseNonNull(), WTFMove(ports), producerOrException.releaseReturnValue()));
transformer->suspendIfNeeded();
return transformer;
}
RTCRtpScriptTransformer::RTCRtpScriptTransformer(ScriptExecutionContext& context, Ref<SerializedScriptValue>&& options, Vector<Ref<MessagePort>>&& ports, Ref<RTCEncodedStreamProducer>&& streamProducer)
: ActiveDOMObject(&context)
, m_options(WTFMove(options))
, m_ports(WTFMove(ports))
, m_streamProducer(WTFMove(streamProducer))
{
}
RTCRtpScriptTransformer::~RTCRtpScriptTransformer() = default;
ReadableStream& RTCRtpScriptTransformer::readable()
{
return m_streamProducer->readable();
}
WritableStream& RTCRtpScriptTransformer::writable()
{
return m_streamProducer->writable();
}
void RTCRtpScriptTransformer::start(Ref<RTCRtpTransformBackend>&& backend)
{
m_isSender = backend->side() == RTCRtpTransformBackend::Side::Sender;
m_streamProducer->start(WTFMove(backend), backend->mediaType() == RTCRtpTransformBackend::MediaType::Video);
}
void RTCRtpScriptTransformer::clear(ClearCallback clearCallback)
{
m_streamProducer->clear(clearCallback == ClearCallback::Yes);
stopPendingActivity();
}
static std::optional<Exception> validateRid(const String& rid)
{
if (rid.isNull())
return { };
if (rid.isEmpty())
return Exception { ExceptionCode::NotAllowedError, "rid is empty"_s };
constexpr unsigned maxRidLength = 255;
if (rid.length() > maxRidLength)
return Exception { ExceptionCode::NotAllowedError, "rid is too long"_s };
auto foundBadCharacters = rid.find([](auto character) -> bool {
return !isASCIIDigit(character) && !isASCIIAlpha(character);
});
if (foundBadCharacters != notFound)
return Exception { ExceptionCode::NotAllowedError, "rid has a character that is not alpha numeric"_s };
return { };
}
void RTCRtpScriptTransformer::generateKeyFrame(const String& rid, Ref<DeferredPromise>&& promise)
{
RefPtr context = scriptExecutionContext();
if (!context || !m_streamProducer->isVideo() || !m_isSender) {
promise->reject(Exception { ExceptionCode::InvalidStateError, "Not attached to a valid video sender"_s });
return;
}
if (auto exception = validateRid(rid)) {
promise->reject(WTFMove(*exception));
return;
}
m_streamProducer->generateKeyFrame(*context, rid, WTFMove(promise));
}
void RTCRtpScriptTransformer::sendKeyFrameRequest(Ref<DeferredPromise>&& promise)
{
RefPtr context = scriptExecutionContext();
if (!context || !m_streamProducer->isVideo() || m_isSender) {
promise->reject(Exception { ExceptionCode::InvalidStateError, "Not attached to a valid video receiver"_s });
return;
}
m_streamProducer->sendKeyFrameRequest();
// FIXME: We should be able to know when the FIR request is sent to resolve the promise at this exact time.
context->eventLoop().queueTask(TaskSource::Networking, [promise = WTFMove(promise)]() mutable {
promise->resolve();
});
}
JSC::JSValue RTCRtpScriptTransformer::options(JSC::JSGlobalObject& globalObject)
{
return m_options->deserialize(globalObject, &globalObject, m_ports);
}
} // namespace WebCore
#endif // ENABLE(WEB_RTC)
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