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/*
* Copyright (C) 2018 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(MEDIA_RECORDER)
#include "ActiveDOMObject.h"
#include "EventTarget.h"
#include "ExceptionOr.h"
#include "MediaRecorderPrivateOptions.h"
#include "MediaStream.h"
#include "MediaStreamTrackPrivate.h"
#include "Timer.h"
#include <wtf/Deque.h>
#include <wtf/UniqueRef.h>
namespace WebCore {
class Blob;
class Document;
class MediaRecorderPrivate;
class MediaRecorder final
: public ActiveDOMObject
, public RefCounted<MediaRecorder>
, public EventTarget
, private MediaStreamPrivateObserver
, private MediaStreamTrackPrivateObserver {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(MediaRecorder);
public:
void ref() const final { RefCounted::ref(); }
void deref() const final { RefCounted::deref(); }
enum class RecordingState { Inactive, Recording, Paused };
~MediaRecorder();
static bool isTypeSupported(Document&, const String&);
using Options = MediaRecorderPrivateOptions;
static ExceptionOr<Ref<MediaRecorder>> create(Document&, Ref<MediaStream>&&, Options&& = { });
using CreatorFunction = ExceptionOr<std::unique_ptr<MediaRecorderPrivate>> (*)(MediaStreamPrivate&, const Options&);
WEBCORE_EXPORT static void setCustomPrivateRecorderCreator(CreatorFunction);
RecordingState state() const { return m_state; }
const String& mimeType() const { return m_options.mimeType; }
ExceptionOr<void> startRecording(std::optional<unsigned>);
void stopRecording();
ExceptionOr<void> requestData();
ExceptionOr<void> pauseRecording();
ExceptionOr<void> resumeRecording();
unsigned videoBitsPerSecond() const { return m_videoBitsPerSecond; }
unsigned audioBitsPerSecond() const { return m_audioBitsPerSecond; }
MediaStream& stream() { return m_stream.get(); }
USING_CAN_MAKE_WEAKPTR(EventTarget);
private:
MediaRecorder(Document&, Ref<MediaStream>&&, Options&&);
static ExceptionOr<std::unique_ptr<MediaRecorderPrivate>> createMediaRecorderPrivate(MediaStreamPrivate&, const Options&);
Document* document() const;
// EventTarget
void refEventTarget() final { ref(); }
void derefEventTarget() final { deref(); }
enum EventTargetInterfaceType eventTargetInterface() const final { return EventTargetInterfaceType::MediaRecorder; }
ScriptExecutionContext* scriptExecutionContext() const final { return ActiveDOMObject::scriptExecutionContext(); }
// ActiveDOMObject.
void suspend(ReasonForSuspension) final;
void stop() final;
bool virtualHasPendingActivity() const final;
void stopRecordingInternal(CompletionHandler<void()>&& = [] { });
void dispatchError(Exception&&);
enum class TakePrivateRecorder : bool { No, Yes };
using FetchDataCallback = Function<void(RefPtr<FragmentedSharedBuffer>&&, const String& mimeType, double)>;
void fetchData(FetchDataCallback&&, TakePrivateRecorder);
enum class ReturnDataIfEmpty : bool { No, Yes };
ExceptionOr<void> requestDataInternal(ReturnDataIfEmpty);
// MediaStream::Observer
void didAddTrack(MediaStreamTrackPrivate&) final { handleTrackChange(); }
void didRemoveTrack(MediaStreamTrackPrivate&) final { handleTrackChange(); }
void handleTrackChange();
// MediaStreamTrackPrivateObserver
void trackEnded(MediaStreamTrackPrivate&) final;
void trackMutedChanged(MediaStreamTrackPrivate&) final;
void trackEnabledChanged(MediaStreamTrackPrivate&) final;
void trackSettingsChanged(MediaStreamTrackPrivate&) final { };
void computeInitialBitRates() { computeBitRates(nullptr); }
void updateBitRates() { computeBitRates(&m_stream->privateStream()); }
void computeBitRates(const MediaStreamPrivate*);
static CreatorFunction m_customCreator;
Options m_options;
Ref<MediaStream> m_stream;
std::unique_ptr<MediaRecorderPrivate> m_private;
RecordingState m_state { RecordingState::Inactive };
Vector<Ref<MediaStreamTrackPrivate>> m_tracks;
static constexpr unsigned m_mimimumTimeSlice { 100 };
std::optional<unsigned> m_timeSlice;
Timer m_timeSliceTimer;
bool m_isActive { true };
bool m_isFetchingData { false };
Deque<FetchDataCallback> m_pendingFetchDataTasks;
unsigned m_audioBitsPerSecond { 0 };
unsigned m_videoBitsPerSecond { 0 };
std::optional<Seconds> m_nextFireInterval;
};
} // namespace WebCore
#endif // ENABLE(MEDIA_RECORDER)
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