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/*
* Copyright (C) 2024 Igalia S.L
* Copyright (C) 2024 Metrological Group B.V.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* aint with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#pragma once
#if USE(GSTREAMER)
#include "GStreamerCommon.h"
#include "MediaPlayer.h"
#include <wtf/Forward.h>
#include <wtf/Noncopyable.h>
#include <wtf/Nonmovable.h>
#include <wtf/RefCounted.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/Vector.h>
namespace WebCore {
class MediaPlayerPrivateGStreamer;
enum class ElementRuntimeCharacteristics : uint8_t {
IsMediaStream = 1 << 0,
HasVideo = 1 << 1,
HasAudio = 1 << 2,
IsLiveStream = 1 << 3,
};
class GStreamerQuirkBase {
WTF_MAKE_TZONE_ALLOCATED(GStreamerQuirkBase);
public:
GStreamerQuirkBase() = default;
virtual ~GStreamerQuirkBase() = default;
virtual const ASCIILiteral identifier() const = 0;
// Interface of classes supplied to MediaPlayerPrivateGStreamer to store values that the quirks will need for their job.
class GStreamerQuirkState {
WTF_DEPRECATED_MAKE_FAST_ALLOCATED(GStreamerQuirkState);
// Prevent accidental https://en.wikipedia.org/wiki/Object_slicing.
WTF_MAKE_NONCOPYABLE(GStreamerQuirkState);
WTF_MAKE_NONMOVABLE(GStreamerQuirkState);
public:
GStreamerQuirkState()
{
}
virtual ~GStreamerQuirkState() = default;
};
};
class GStreamerQuirk : public GStreamerQuirkBase {
WTF_MAKE_TZONE_ALLOCATED(GStreamerQuirk);
public:
GStreamerQuirk() = default;
virtual ~GStreamerQuirk() = default;
virtual bool isPlatformSupported() const { return true; }
virtual GstElement* createAudioSink() { return nullptr; }
virtual GstElement* createWebAudioSink() { return nullptr; }
virtual void configureElement(GstElement*, const OptionSet<ElementRuntimeCharacteristics>&) { }
virtual std::optional<bool> isHardwareAccelerated(GstElementFactory*) { return std::nullopt; }
virtual std::optional<GstElementFactoryListType> audioVideoDecoderFactoryListType() const { return std::nullopt; }
virtual Vector<String> disallowedWebAudioDecoders() const { return { }; }
virtual unsigned getAdditionalPlaybinFlags() const { return 0; }
virtual bool shouldParseIncomingLibWebRTCBitStream() const { return true; }
virtual bool needsBufferingPercentageCorrection() const { return false; }
// Returns name of the queried GstElement, or nullptr if no element was queried.
virtual ASCIILiteral queryBufferingPercentage(MediaPlayerPrivateGStreamer*, const GRefPtr<GstQuery>&) const { return nullptr; }
virtual int correctBufferingPercentage(MediaPlayerPrivateGStreamer*, int originalBufferingPercentage, GstBufferingMode) const { return originalBufferingPercentage; }
virtual void resetBufferingPercentage(MediaPlayerPrivateGStreamer*, int) const { };
virtual void setupBufferingPercentageCorrection(MediaPlayerPrivateGStreamer*, GstState, GstState, GRefPtr<GstElement>&&) const { }
virtual bool needsCustomInstantRateChange() const { return false; }
// Note: Change these pairs and single return types as needed, or even use a struct, if more return fields
// have to be added in the future.
// Returning processed and didInstantRateChange.
virtual std::pair<bool, bool> applyCustomInstantRateChange(
bool isPipelinePlaying, bool isPipelineWaitingPreroll, float playbackRate, bool mute, GstElement* pipeline) const;
// Returning forwardToAllPads.
virtual bool analyzeWebKitMediaSrcCustomEvent(GRefPtr<GstEvent>) const;
// Returning rate.
virtual std::optional<double> processWebKitMediaSrcCustomEvent(GRefPtr<GstEvent>, bool handledByAnyStream, bool handledByAllTheStreams) const;
// Subclass must return true if it wants to override the default behaviour of sibling platforms.
virtual bool processWebAudioSilentBuffer(GstBuffer* buffer) const
{
GST_BUFFER_FLAG_SET(buffer, GST_BUFFER_FLAG_GAP);
GST_BUFFER_FLAG_SET(buffer, GST_BUFFER_FLAG_DROPPABLE);
return false;
}
};
class GStreamerHolePunchQuirk : public GStreamerQuirkBase {
WTF_MAKE_TZONE_ALLOCATED(GStreamerHolePunchQuirk);
public:
GStreamerHolePunchQuirk() = default;
virtual ~GStreamerHolePunchQuirk() = default;
virtual GstElement* createHolePunchVideoSink(bool, const MediaPlayer*) { return nullptr; }
virtual bool setHolePunchVideoRectangle(GstElement*, const IntRect&) { return false; }
virtual bool requiresClockSynchronization() const { return true; }
};
class GStreamerQuirksManager : public RefCounted<GStreamerQuirksManager> {
friend NeverDestroyed<GStreamerQuirksManager>;
WTF_MAKE_TZONE_ALLOCATED(GStreamerQuirksManager);
public:
static GStreamerQuirksManager& singleton();
static RefPtr<GStreamerQuirksManager> createForTesting()
{
return adoptRef(*new GStreamerQuirksManager(true, false));
}
bool isEnabled() const;
GstElement* createAudioSink();
GstElement* createWebAudioSink();
void configureElement(GstElement*, OptionSet<ElementRuntimeCharacteristics>&&);
std::optional<bool> isHardwareAccelerated(GstElementFactory*) const;
GstElementFactoryListType audioVideoDecoderFactoryListType() const;
Vector<String> disallowedWebAudioDecoders() const;
bool supportsVideoHolePunchRendering() const;
GstElement* createHolePunchVideoSink(bool isLegacyPlaybin, const MediaPlayer*);
void setHolePunchVideoRectangle(GstElement*, const IntRect&);
bool sinksRequireClockSynchronization() const;
void setHolePunchEnabledForTesting(bool);
unsigned getAdditionalPlaybinFlags() const;
bool shouldParseIncomingLibWebRTCBitStream() const;
bool needsBufferingPercentageCorrection() const;
// Returns name of the queried GstElement, or nullptr if no element was queried.
ASCIILiteral queryBufferingPercentage(MediaPlayerPrivateGStreamer*, const GRefPtr<GstQuery>&) const;
int correctBufferingPercentage(MediaPlayerPrivateGStreamer*, int originalBufferingPercentage, GstBufferingMode) const;
void resetBufferingPercentage(MediaPlayerPrivateGStreamer*, int bufferingPercentage) const;
void setupBufferingPercentageCorrection(MediaPlayerPrivateGStreamer*, GstState currentState, GstState newState, GRefPtr<GstElement>&&) const;
void processWebAudioSilentBuffer(GstBuffer*) const;
bool needsCustomInstantRateChange() const;
// Returning processed and didInstantRateChange.
std::pair<bool, bool> applyCustomInstantRateChange(
bool isPipelinePlaying, bool isPipelineWaitingPreroll, float playbackRate, bool mute, GstElement* pipeline) const;
bool processCustomInstantRateChangeEvent() const;
// Returning forwardToAllPads.
bool analyzeWebKitMediaSrcCustomEvent(GRefPtr<GstEvent>) const;
// Returning rate.
std::optional<double> processWebKitMediaSrcCustomEvent(GRefPtr<GstEvent>, bool handledByAnyStream, bool handledByAllStreams) const;
private:
GStreamerQuirksManager(bool, bool);
Vector<std::unique_ptr<GStreamerQuirk>> m_quirks;
std::unique_ptr<GStreamerHolePunchQuirk> m_holePunchQuirk;
bool m_isForTesting { false };
};
} // namespace WebCore
#endif // USE(GSTREAMER)
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