| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #include "qvideosink.h" |
| 5 | |
| 6 | #include "qvideoframeformat.h" |
| 7 | #include "qvideoframe.h" |
| 8 | #include "qmediaplayer.h" |
| 9 | #include "qmediacapturesession.h" |
| 10 | |
| 11 | #include <qvariant.h> |
| 12 | #include <qpainter.h> |
| 13 | #include <qmatrix4x4.h> |
| 14 | #include <QDebug> |
| 15 | #include <private/qplatformmediaintegration_p.h> |
| 16 | #include <private/qplatformvideosink_p.h> |
| 17 | |
| 18 | QT_BEGIN_NAMESPACE |
| 19 | |
| 20 | class QVideoSinkPrivate { |
| 21 | public: |
| 22 | QVideoSinkPrivate(QVideoSink *q) |
| 23 | : q_ptr(q) |
| 24 | { |
| 25 | auto maybeVideoSink = QPlatformMediaIntegration::instance()->createVideoSink(q); |
| 26 | if (maybeVideoSink) { |
| 27 | videoSink = maybeVideoSink.value(); |
| 28 | } else { |
| 29 | qWarning() << "Failed to create QVideoSink"<< maybeVideoSink.error(); |
| 30 | } |
| 31 | } |
| 32 | ~QVideoSinkPrivate() |
| 33 | { |
| 34 | delete videoSink; |
| 35 | } |
| 36 | void unregisterSource() |
| 37 | { |
| 38 | if (!source) |
| 39 | return; |
| 40 | auto *old = source; |
| 41 | source = nullptr; |
| 42 | if (auto *player = qobject_cast<QMediaPlayer *>(object: old)) |
| 43 | player->setVideoSink(nullptr); |
| 44 | else if (auto *capture = qobject_cast<QMediaCaptureSession *>(object: old)) |
| 45 | capture->setVideoSink(nullptr); |
| 46 | } |
| 47 | |
| 48 | QVideoSink *q_ptr = nullptr; |
| 49 | QPlatformVideoSink *videoSink = nullptr; |
| 50 | QObject *source = nullptr; |
| 51 | QRhi *rhi = nullptr; |
| 52 | }; |
| 53 | |
| 54 | /*! |
| 55 | \class QVideoSink |
| 56 | |
| 57 | \brief The QVideoSink class represents a generic sink for video data. |
| 58 | \inmodule QtMultimedia |
| 59 | \ingroup multimedia |
| 60 | \ingroup multimedia_video |
| 61 | |
| 62 | The QVideoSink class can be used to retrieve video data on a frame by frame |
| 63 | basis from Qt Multimedia. |
| 64 | |
| 65 | QVideoSink will provide individual video frames to the application developer |
| 66 | through the videoFrameChanged() signal. |
| 67 | |
| 68 | The video frame can then be used to read out the data of those frames and handle them |
| 69 | further. When using QPainter, the QVideoFrame can be drawing using the paint() method |
| 70 | in QVideoSink. |
| 71 | |
| 72 | QVideoFrame objects can consume a significant amount of memory or system resources and |
| 73 | should thus not be held for longer than required by the application. |
| 74 | |
| 75 | \sa QMediaPlayer, QMediaCaptureSession |
| 76 | |
| 77 | */ |
| 78 | |
| 79 | /*! |
| 80 | Constructs a new QVideoSink object with \a parent. |
| 81 | */ |
| 82 | QVideoSink::QVideoSink(QObject *parent) |
| 83 | : QObject(parent), |
| 84 | d(new QVideoSinkPrivate(this)) |
| 85 | { |
| 86 | qRegisterMetaType<QVideoFrame>(); |
| 87 | } |
| 88 | |
| 89 | /*! |
| 90 | Destroys the object. |
| 91 | */ |
| 92 | QVideoSink::~QVideoSink() |
| 93 | { |
| 94 | disconnect(receiver: this); |
| 95 | d->unregisterSource(); |
| 96 | delete d; |
| 97 | } |
| 98 | |
| 99 | /*! |
| 100 | Returns the QRhi instance being used to create texture data in the video frames. |
| 101 | */ |
| 102 | QRhi *QVideoSink::rhi() const |
| 103 | { |
| 104 | return d->rhi; |
| 105 | } |
| 106 | |
| 107 | /*! |
| 108 | \internal |
| 109 | Sets the QRhi instance being used to create texture data in the video frames |
| 110 | to \a rhi. |
| 111 | */ |
| 112 | void QVideoSink::setRhi(QRhi *rhi) |
| 113 | { |
| 114 | if (d->rhi == rhi) |
| 115 | return; |
| 116 | d->rhi = rhi; |
| 117 | if (d->videoSink) |
| 118 | d->videoSink->setRhi(rhi); |
| 119 | } |
| 120 | |
| 121 | /*! |
| 122 | \internal |
| 123 | */ |
| 124 | QPlatformVideoSink *QVideoSink::platformVideoSink() const |
| 125 | { |
| 126 | return d->videoSink; |
| 127 | } |
| 128 | |
| 129 | /*! |
| 130 | Returns the current video frame. |
| 131 | */ |
| 132 | QVideoFrame QVideoSink::videoFrame() const |
| 133 | { |
| 134 | return d->videoSink ? d->videoSink->currentVideoFrame() : QVideoFrame{}; |
| 135 | } |
| 136 | |
| 137 | /*! |
| 138 | \fn void QVideoSink::videoFrameChanged(const QVideoFrame &frame) const |
| 139 | |
| 140 | Signals when the video \a frame changes. |
| 141 | */ |
| 142 | /*! |
| 143 | Sets the current video \a frame. |
| 144 | */ |
| 145 | void QVideoSink::setVideoFrame(const QVideoFrame &frame) |
| 146 | { |
| 147 | if (d->videoSink) |
| 148 | d->videoSink->setVideoFrame(frame); |
| 149 | } |
| 150 | |
| 151 | /*! |
| 152 | \property QVideoSink::subtitleText |
| 153 | |
| 154 | Returns the current subtitle text. |
| 155 | */ |
| 156 | QString QVideoSink::subtitleText() const |
| 157 | { |
| 158 | return d->videoSink ? d->videoSink->subtitleText() : QString{}; |
| 159 | } |
| 160 | |
| 161 | /*! |
| 162 | Sets the current \a subtitle text. |
| 163 | */ |
| 164 | void QVideoSink::setSubtitleText(const QString &subtitle) |
| 165 | { |
| 166 | if (d->videoSink) |
| 167 | d->videoSink->setSubtitleText(subtitle); |
| 168 | } |
| 169 | |
| 170 | /*! |
| 171 | \property QVideoSink::videoSize |
| 172 | |
| 173 | Returns the size of the video currently being played back. If no video is |
| 174 | being played, this method returns an invalid size. |
| 175 | */ |
| 176 | QSize QVideoSink::videoSize() const |
| 177 | { |
| 178 | return d->videoSink ? d->videoSink->nativeSize() : QSize{}; |
| 179 | } |
| 180 | |
| 181 | void QVideoSink::setSource(QObject *source) |
| 182 | { |
| 183 | if (d->source == source) |
| 184 | return; |
| 185 | if (source) |
| 186 | d->unregisterSource(); |
| 187 | d->source = source; |
| 188 | } |
| 189 | |
| 190 | QT_END_NAMESPACE |
| 191 | |
| 192 | #include "moc_qvideosink.cpp" |
| 193 | |
| 194 | |
| 195 |