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39
40#include "avfvideowidget.h"
41
42#import <AVFoundation/AVFoundation.h>
43#import <QuartzCore/CATransaction.h>
44
45#if defined(Q_OS_MACOS)
46#import <AppKit/AppKit.h>
47#else
48#import <UIKit/UIKit.h>
49#endif
50
51#include <QtCore/QDebug>
52#include <QtGui/QResizeEvent>
53#include <QtGui/QPaintEvent>
54#include <QtGui/QPainter>
55
56QT_USE_NAMESPACE
57
58AVFVideoWidget::AVFVideoWidget(QWidget *parent)
59    : QWidget(parent)
60    , m_aspectRatioMode(Qt::KeepAspectRatio)
61    , m_playerLayer(nullptr)
62    , m_nativeView(nullptr)
63{
64    setAutoFillBackground(false);
65}
66
67AVFVideoWidget::~AVFVideoWidget()
68{
69#ifdef QT_DEBUG_AVF
70    qDebug() << Q_FUNC_INFO;
71#endif
72
73    if (m_playerLayer) {
74        [m_playerLayer removeFromSuperlayer];
75        [m_playerLayer release];
76    }
77}
78
79QSize AVFVideoWidget::sizeHint() const
80{
81    return m_nativeSize;
82}
83
84Qt::AspectRatioMode AVFVideoWidget::aspectRatioMode() const
85{
86    return m_aspectRatioMode;
87}
88
89void AVFVideoWidget::setAspectRatioMode(Qt::AspectRatioMode mode)
90{
91    if (m_aspectRatioMode != mode) {
92        m_aspectRatioMode = mode;
93
94        updateAspectRatio();
95    }
96}
97
98void AVFVideoWidget::setPlayerLayer(AVPlayerLayer *layer)
99{
100    if (m_playerLayer == layer)
101        return;
102
103    if (!m_nativeView) {
104        //make video widget a native window
105#if defined(Q_OS_OSX)
106        m_nativeView = (NSView*)this->winId();
107        [m_nativeView setWantsLayer:YES];
108#else
109        m_nativeView = (UIView*)this->winId();
110#endif
111    }
112
113    if (m_playerLayer) {
114        [m_playerLayer removeFromSuperlayer];
115        [m_playerLayer release];
116    }
117
118    m_playerLayer = layer;
119
120    CALayer *nativeLayer = [m_nativeView layer];
121
122    if (layer) {
123        [layer retain];
124
125        m_nativeSize = QSize(m_playerLayer.bounds.size.width,
126                             m_playerLayer.bounds.size.height);
127
128        updateAspectRatio();
129        [nativeLayer addSublayer:m_playerLayer];
130        updatePlayerLayerBounds(this->size());
131    }
132#ifdef QT_DEBUG_AVF
133    NSArray *sublayers = [nativeLayer sublayers];
134    qDebug() << "playerlayer: " << "at z:" << [m_playerLayer zPosition]
135                << " frame: " << m_playerLayer.frame.size.width << "x"  << m_playerLayer.frame.size.height;
136    qDebug() << "superlayer: " << "at z:" << [nativeLayer zPosition]
137                << " frame: " << nativeLayer.frame.size.width << "x"  << nativeLayer.frame.size.height;
138    int i = 0;
139    for (CALayer *layer in sublayers) {
140        qDebug() << "layer " << i << ": at z:" << [layer zPosition]
141                    << " frame: " << layer.frame.size.width << "x"  << layer.frame.size.height;
142        i++;
143    }
144#endif
145
146}
147
148void AVFVideoWidget::resizeEvent(QResizeEvent *event)
149{
150    updatePlayerLayerBounds(event->size());
151    QWidget::resizeEvent(event);
152}
153
154void AVFVideoWidget::paintEvent(QPaintEvent *event)
155{
156    QPainter painter(this);
157    painter.fillRect(rect(), Qt::black);
158
159    QWidget::paintEvent(event);
160}
161
162void AVFVideoWidget::updateAspectRatio()
163{
164    if (m_playerLayer) {
165        switch (m_aspectRatioMode) {
166        case Qt::IgnoreAspectRatio:
167            [m_playerLayer setVideoGravity:AVLayerVideoGravityResize];
168            break;
169        case Qt::KeepAspectRatio:
170            [m_playerLayer setVideoGravity:AVLayerVideoGravityResizeAspect];
171            break;
172        case Qt::KeepAspectRatioByExpanding:
173            [m_playerLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
174            break;
175        default:
176            break;
177        }
178    }
179}
180
181void AVFVideoWidget::updatePlayerLayerBounds(const QSize &size)
182{
183    [CATransaction begin];
184    [CATransaction setDisableActions: YES]; // disable animation/flicks
185    m_playerLayer.bounds = QRect(QPoint(0, 0), size).toCGRect();
186    [CATransaction commit];
187}
188