qandroidvideoframefactory.cpp

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// Copyright (C) 2024 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#include <QtFFmpegMediaPluginImpl/private/qandroidvideoframefactory_p.h>

#include <QtMultimedia/qvideoframe.h>

QT_BEGIN_NAMESPACE

namespace {

// This is due to a limitation of ImageReader. When limit is reached, we cannot acquire more frames

// until we close any of the previous image. That is why, When the limit is reached, we will do

// a copy of the frame data and immediately close the image.

constexpr int NATIVE_FRAME_LIMIT = 10;

QVideoFrame QAndroidVideoFrameFactory::createVideoFrame(QtJniTypes::Image frame,

                                                        QtVideo::Rotation rotation)

    const int currentCounter = m_framesCounter.fetch_add(1, std::memory_order_relaxed) + 1;

    auto frameAdapter = std::make_unique<QAndroidVideoFrameBuffer>(

            frame,

            shared_from_this(),

            currentCounter > NATIVE_FRAME_LIMIT ?

                QAndroidVideoFrameBuffer::MemoryPolicy::Copy

              : QAndroidVideoFrameBuffer::MemoryPolicy::Reuse,

            rotation);

    if (!frameAdapter->isParsed())

        return QVideoFrame{};

    const qint64 currentTimeStamp = frameAdapter->timestamp();

    QVideoFrame videoFrame(std::move(frameAdapter));

    if (m_lastTimestamp == 0)

        m_lastTimestamp = currentTimeStamp;

    videoFrame.setStartTime(m_lastTimestamp);

    videoFrame.setEndTime(currentTimeStamp);

    m_lastTimestamp = currentTimeStamp;

    return videoFrame;

void QAndroidVideoFrameFactory::onFrameReleased()

    const int currentCounter = m_framesCounter.fetch_sub(1, std::memory_order_relaxed);

    Q_ASSERT(currentCounter >= 0);

QT_END_NAMESPACE