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/****************************************************************************
**
** Copyright (C) 2022 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
******************************************************************************/
#ifndef QLINUXMEDIADEVICE_H
#define QLINUXMEDIADEVICE_H
#include <linux/v4l2-mediabus.h>
#include <QtCore/qglobal.h>
#include <QtCore/QString>
QT_BEGIN_NAMESPACE
class QSize;
class QRect;
class QLinuxMediaDevice
{
public:
QLinuxMediaDevice(const QString &devicePath);
~QLinuxMediaDevice();
QString model();
QString deviceName();
bool resetLinks();
struct media_link *parseLink(const QString &link);
struct media_pad *parsePad(const QString &pad);
bool enableLink(struct media_link *link);
bool disableLink(struct media_link *link);
struct media_entity *getEntity(const QString &name);
int openVideoDevice(const QString &name);
class CaptureSubDevice
{
public:
CaptureSubDevice(QLinuxMediaDevice *mediaDevice, const QString &name);
bool setFormat(const QSize &size, uint32_t pixelFormat = V4L2_PIX_FMT_ABGR32); //TODO: fix to match output device
bool clearBuffers();
bool requestBuffer();
bool queueBuffer(int dmabufFd, const QSize &bufferSize);
bool dequeueBuffer();
bool streamOn();
bool streamOff();
private:
int m_subdevFd = -1;
};
class OutputSubDevice
{
public:
OutputSubDevice(QLinuxMediaDevice *mediaDevice, const QString &name);
bool setFormat(const QSize &size, uint32_t pixelFormat, uint32_t bytesPerLine);
bool clearBuffers();
bool requestBuffer();
bool queueBuffer(int dmabufFd, uint bytesUsed, uint length);
bool streamOn();
bool streamOff();
private:
int m_subdevFd = -1;
};
static int openVideoDevice(media_pad *pad);
static bool setSubdevFormat(struct media_pad *pad, const QSize &size, uint32_t mbusFormat = MEDIA_BUS_FMT_ARGB8888_1X32);
static bool setSubdevAlpha(int subdevFd, qreal alpha);
static bool setSubdevSelection(struct media_pad *pad, const QRect &geometry, uint target);
static bool setSubdevCrop(struct media_pad *pad, const QRect &geometry);
static bool setSubdevCompose(struct media_pad *pad, const QRect &geometry);
private:
static bool streamOn(int subDeviceFd, v4l2_buf_type bufferType);
static bool streamOff(int subDeviceFd, v4l2_buf_type bufferType);
struct media_device *m_mediaDevice = nullptr;
const struct media_device_info *m_info = nullptr;
};
QT_END_NAMESPACE
#endif // QLINUXMEDIADEVICE_H
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