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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
#include "ExceptionOr.h"
#include "MediaRecorderPrivateOptions.h"
#include "RealtimeMediaSource.h"
#include <wtf/CompletionHandler.h>
#include <wtf/Forward.h>
#include <wtf/ThreadSafeWeakPtr.h>
#if ENABLE(MEDIA_RECORDER)
namespace WTF {
class MediaTime;
}
namespace WebCore {
class AudioStreamDescription;
class MediaSample;
class MediaStreamPrivate;
class MediaStreamTrackPrivate;
class PlatformAudioData;
class FragmentedSharedBuffer;
struct MediaRecorderPrivateOptions;
class MediaRecorderPrivate
: public ThreadSafeRefCountedAndCanMakeThreadSafeWeakPtr<MediaRecorderPrivate>
, public RealtimeMediaSource::AudioSampleObserver
, public RealtimeMediaSource::VideoFrameObserver {
public:
virtual ~MediaRecorderPrivate();
struct AudioVideoSelectedTracks {
MediaStreamTrackPrivate* audioTrack { nullptr };
MediaStreamTrackPrivate* videoTrack { nullptr };
};
WEBCORE_EXPORT static AudioVideoSelectedTracks selectTracks(MediaStreamPrivate&);
using FetchDataCallback = CompletionHandler<void(RefPtr<FragmentedSharedBuffer>&&, const String& mimeType, double)>;
virtual void fetchData(FetchDataCallback&&) = 0;
virtual const String& mimeType() const = 0;
void stop(CompletionHandler<void()>&&);
void pause(CompletionHandler<void()>&&);
void resume(CompletionHandler<void()>&&);
using StartRecordingCallback = CompletionHandler<void(ExceptionOr<String>&&, unsigned, unsigned)>;
virtual void startRecording(StartRecordingCallback&& callback) { callback(String(mimeType()), 0, 0); }
void trackMutedChanged(MediaStreamTrackPrivate& track) { checkTrackState(track); }
void trackEnabledChanged(MediaStreamTrackPrivate& track) { checkTrackState(track); }
struct BitRates {
unsigned audio;
unsigned video;
};
static BitRates computeBitRates(const MediaRecorderPrivateOptions&, const MediaStreamPrivate* = nullptr);
protected:
MediaRecorderPrivate() = default;
void setAudioSource(RefPtr<RealtimeMediaSource>&&);
void setVideoSource(RefPtr<RealtimeMediaSource>&&);
void checkTrackState(const MediaStreamTrackPrivate&);
bool shouldMuteAudio() const { return m_shouldMuteAudio; }
bool shouldMuteVideo() const { return m_shouldMuteVideo; }
private:
virtual void stopRecording(CompletionHandler<void()>&&) = 0;
virtual void pauseRecording(CompletionHandler<void()>&&) = 0;
virtual void resumeRecording(CompletionHandler<void()>&&) = 0;
bool m_shouldMuteAudio { false };
bool m_shouldMuteVideo { false };
RefPtr<RealtimeMediaSource> m_audioSource;
RefPtr<RealtimeMediaSource> m_videoSource;
RefPtr<RealtimeMediaSource> m_pausedAudioSource;
RefPtr<RealtimeMediaSource> m_pausedVideoSource;
};
inline void MediaRecorderPrivate::setAudioSource(RefPtr<RealtimeMediaSource>&& audioSource)
{
if (m_audioSource)
m_audioSource->removeAudioSampleObserver(*this);
m_audioSource = WTFMove(audioSource);
if (m_audioSource)
m_audioSource->addAudioSampleObserver(*this);
}
inline void MediaRecorderPrivate::setVideoSource(RefPtr<RealtimeMediaSource>&& videoSource)
{
if (m_videoSource)
m_videoSource->removeVideoFrameObserver(*this);
m_videoSource = WTFMove(videoSource);
if (m_videoSource)
m_videoSource->addVideoFrameObserver(*this);
}
inline MediaRecorderPrivate::~MediaRecorderPrivate()
{
// Subclasses should stop observing sonner than here. Otherwise they might be called from a background thread while half destroyed
ASSERT(!m_audioSource);
ASSERT(!m_videoSource);
if (m_audioSource)
m_audioSource->removeAudioSampleObserver(*this);
if (m_videoSource)
m_videoSource->removeVideoFrameObserver(*this);
}
} // namespace WebCore
#endif // ENABLE(MEDIA_RECORDER)
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