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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the Qt Mobility Components. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include "qmemoryvideobuffer_p.h" |
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43 |
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44 #include "qabstractvideobuffer_p.h" |
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45 #include <qbytearray.h> |
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46 |
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47 QT_BEGIN_NAMESPACE |
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48 |
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49 class QMemoryVideoBufferPrivate : public QAbstractVideoBufferPrivate |
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50 { |
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51 public: |
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52 QMemoryVideoBufferPrivate() |
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53 : bytesPerLine(0) |
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54 , mapMode(QAbstractVideoBuffer::NotMapped) |
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55 { |
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56 } |
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57 |
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58 int bytesPerLine; |
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59 QAbstractVideoBuffer::MapMode mapMode; |
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60 QByteArray data; |
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61 }; |
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62 |
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63 /*! |
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64 \class QMemoryVideoBuffer |
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65 \brief The QMemoryVideoBuffer class provides a system memory allocated video data buffer. |
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66 \internal |
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67 |
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68 QMemoryVideoBuffer is the default video buffer for allocating system memory. It may be used to |
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69 allocate memory for a QVideoFrame without implementing your own QAbstractVideoBuffer. |
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70 */ |
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71 |
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72 /*! |
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73 Constructs a video buffer with an image stride of \a bytesPerLine from a byte \a array. |
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74 */ |
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75 QMemoryVideoBuffer::QMemoryVideoBuffer(const QByteArray &array, int bytesPerLine) |
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76 : QAbstractVideoBuffer(*new QMemoryVideoBufferPrivate, NoHandle) |
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77 { |
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78 Q_D(QMemoryVideoBuffer); |
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79 |
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80 d->data = array; |
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81 d->bytesPerLine = bytesPerLine; |
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82 } |
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83 |
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84 /*! |
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85 Destroys a system memory allocated video buffer. |
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86 */ |
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87 QMemoryVideoBuffer::~QMemoryVideoBuffer() |
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88 { |
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89 } |
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90 |
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91 /*! |
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92 \reimp |
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93 */ |
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94 QAbstractVideoBuffer::MapMode QMemoryVideoBuffer::mapMode() const |
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95 { |
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96 return d_func()->mapMode; |
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97 } |
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98 |
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99 /*! |
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100 \reimp |
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101 */ |
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102 uchar *QMemoryVideoBuffer::map(MapMode mode, int *numBytes, int *bytesPerLine) |
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103 { |
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104 Q_D(QMemoryVideoBuffer); |
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105 |
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106 if (d->mapMode == NotMapped && d->data.data() && mode != NotMapped) { |
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107 d->mapMode = mode; |
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108 |
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109 if (numBytes) |
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110 *numBytes = d->data.size(); |
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111 |
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112 if (bytesPerLine) |
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113 *bytesPerLine = d->bytesPerLine; |
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114 |
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115 return reinterpret_cast<uchar *>(d->data.data()); |
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116 } else { |
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117 return 0; |
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118 } |
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119 } |
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120 |
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121 /*! |
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122 \reimp |
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123 */ |
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124 void QMemoryVideoBuffer::unmap() |
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125 { |
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126 d_func()->mapMode = NotMapped; |
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127 } |
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128 |
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129 QT_END_NAMESPACE |