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/*
* Copyright (C) 2022 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.
*/
#pragma once
#if ENABLE(WEB_CODECS)
#include "ActiveDOMObject.h"
#include "EventTarget.h"
#include "JSDOMPromiseDeferredForward.h"
#include "VideoDecoder.h"
#include "WebCodecsCodecState.h"
#include "WebCodecsEncodedVideoChunkType.h"
#include "WebCodecsVideoDecoderSupport.h"
#include <wtf/Deque.h>
#include <wtf/Vector.h>
namespace WebCore {
class WebCodecsEncodedVideoChunk;
class WebCodecsErrorCallback;
class WebCodecsVideoFrameOutputCallback;
class WebCodecsVideoDecoder
: public RefCounted<WebCodecsVideoDecoder>
, public ActiveDOMObject
, public EventTarget {
WTF_MAKE_ISO_ALLOCATED(WebCodecsVideoDecoder);
public:
~WebCodecsVideoDecoder();
struct Init {
RefPtr<WebCodecsVideoFrameOutputCallback> output;
RefPtr<WebCodecsErrorCallback> error;
};
static Ref<WebCodecsVideoDecoder> create(ScriptExecutionContext&, Init&&);
WebCodecsCodecState state() const { return m_state; }
size_t decodeQueueSize() const { return m_decodeQueueSize; }
ExceptionOr<void> configure(ScriptExecutionContext&, WebCodecsVideoDecoderConfig&&);
ExceptionOr<void> decode(Ref<WebCodecsEncodedVideoChunk>&&);
ExceptionOr<void> flush(Ref<DeferredPromise>&&);
ExceptionOr<void> reset();
ExceptionOr<void> close();
static void isConfigSupported(ScriptExecutionContext&, WebCodecsVideoDecoderConfig&&, Ref<DeferredPromise>&&);
using RefCounted::ref;
using RefCounted::deref;
private:
WebCodecsVideoDecoder(ScriptExecutionContext&, Init&&);
// ActiveDOMObject API.
void stop() final;
const char* activeDOMObjectName() const final;
void suspend(ReasonForSuspension) final;
bool virtualHasPendingActivity() const final;
// EventTarget
void refEventTarget() final { ref(); }
void derefEventTarget() final { deref(); }
EventTargetInterface eventTargetInterface() const final { return WebCodecsVideoDecoderEventTargetInterfaceType; }
ScriptExecutionContext* scriptExecutionContext() const final { return ActiveDOMObject::scriptExecutionContext(); }
ExceptionOr<void> closeDecoder(Exception&&);
ExceptionOr<void> resetDecoder(const Exception&);
void setInternalDecoder(UniqueRef<VideoDecoder>&&);
void scheduleDequeueEvent();
void queueControlMessageAndProcess(Function<void()>&&);
void processControlMessageQueue();
WebCodecsCodecState m_state { WebCodecsCodecState::Unconfigured };
size_t m_decodeQueueSize { 0 };
size_t m_beingDecodedQueueSize { 0 };
Ref<WebCodecsVideoFrameOutputCallback> m_output;
Ref<WebCodecsErrorCallback> m_error;
std::unique_ptr<VideoDecoder> m_internalDecoder;
bool m_dequeueEventScheduled { false };
Deque<Ref<DeferredPromise>> m_pendingFlushPromises;
size_t m_clearFlushPromiseCount { 0 };
bool m_isKeyChunkRequired { false };
Deque<Function<void()>> m_controlMessageQueue;
bool m_isMessageQueueBlocked { false };
bool m_isFlushing { false };
};
}
#endif
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