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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 "GStreamerQuirks.h"
#include "MediaPlayerPrivateGStreamer.h"
#include <wtf/Vector.h>
namespace WebCore {
class GStreamerQuirkBroadcomBase : public GStreamerQuirk {
public:
GStreamerQuirkBroadcomBase();
bool needsBufferingPercentageCorrection() const { return true; }
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;
protected:
class MovingAverage {
public:
MovingAverage(size_t length)
: m_values(length)
{
// Ensure that the sum in accumulate() can't ever overflow, considering that the highest value
// for stored percentages is 100.
ASSERT(length < INT_MAX / 100);
}
void reset(int value)
{
ASSERT(value <= 100);
for (size_t i = 0; i < m_values.size(); i++)
m_values[i] = value;
}
int accumulate(int value)
{
ASSERT(value <= 100);
int sum = 0;
for (size_t i = 1; i < m_values.size(); i++) {
m_values[i - 1] = m_values[i];
sum += m_values[i - 1];
}
m_values[m_values.size() - 1] = value;
sum += value;
return sum / m_values.size();
}
private:
Vector<int> m_values;
};
using GStreamerQuirkBase::GStreamerQuirkState;
class GStreamerQuirkBroadcomBaseState : public GStreamerQuirkState {
public:
GStreamerQuirkBroadcomBaseState() = default;
virtual ~GStreamerQuirkBroadcomBaseState() = default;
GRefPtr<GstElement> m_audfilter;
GRefPtr<GstElement> m_vidfilter;
GRefPtr<GstElement> m_multiqueue;
GRefPtr<GstElement> m_queue2;
MovingAverage m_streamBufferingLevelMovingAverage { 10 };
};
virtual GStreamerQuirkBroadcomBaseState& ensureState(MediaPlayerPrivateGStreamer*) const;
};
} // namespace WebCore
#endif // USE(GSTREAMER)
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