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39
40#include "qmemoryvideobuffer_p.h"
41
42#include "qabstractvideobuffer_p.h"
43#include <qbytearray.h>
44
45QT_BEGIN_NAMESPACE
46
47class QMemoryVideoBufferPrivate : public QAbstractVideoBufferPrivate
48{
49public:
50 QMemoryVideoBufferPrivate()
51 : bytesPerLine(0)
52 , mapMode(QAbstractVideoBuffer::NotMapped)
53 {
54 }
55
56 int bytesPerLine;
57 QAbstractVideoBuffer::MapMode mapMode;
58 QByteArray data;
59};
60
61/*!
62 \class QMemoryVideoBuffer
63 \brief The QMemoryVideoBuffer class provides a system memory allocated video data buffer.
64 \internal
65
66 QMemoryVideoBuffer is the default video buffer for allocating system memory. It may be used to
67 allocate memory for a QVideoFrame without implementing your own QAbstractVideoBuffer.
68*/
69
70/*!
71 Constructs a video buffer with an image stride of \a bytesPerLine from a byte \a array.
72*/
73QMemoryVideoBuffer::QMemoryVideoBuffer(const QByteArray &array, int bytesPerLine)
74 : QAbstractVideoBuffer(*new QMemoryVideoBufferPrivate, NoHandle)
75{
76 Q_D(QMemoryVideoBuffer);
77
78 d->data = array;
79 d->bytesPerLine = bytesPerLine;
80}
81
82/*!
83 Destroys a system memory allocated video buffer.
84*/
85QMemoryVideoBuffer::~QMemoryVideoBuffer()
86{
87}
88
89/*!
90 \reimp
91*/
92QAbstractVideoBuffer::MapMode QMemoryVideoBuffer::mapMode() const
93{
94 return d_func()->mapMode;
95}
96
97/*!
98 \reimp
99*/
100uchar *QMemoryVideoBuffer::map(MapMode mode, int *numBytes, int *bytesPerLine)
101{
102 Q_D(QMemoryVideoBuffer);
103
104 if (d->mapMode == NotMapped && d->data.data() && mode != NotMapped) {
105 d->mapMode = mode;
106
107 if (numBytes)
108 *numBytes = d->data.size();
109
110 if (bytesPerLine)
111 *bytesPerLine = d->bytesPerLine;
112
113 return reinterpret_cast<uchar *>(d->data.data());
114 } else {
115 return nullptr;
116 }
117}
118
119/*!
120 \reimp
121*/
122void QMemoryVideoBuffer::unmap()
123{
124 d_func()->mapMode = NotMapped;
125}
126
127QT_END_NAMESPACE
128