1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 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 "v4lvideobuffer.h" |
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43 |
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44 #include <linux/types.h> |
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45 #include <sys/time.h> |
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46 #include <sys/ioctl.h> |
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47 #include <sys/poll.h> |
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48 #include <unistd.h> |
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49 #include <fcntl.h> |
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50 #include <errno.h> |
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51 #include <string.h> |
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52 #include <stdlib.h> |
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53 #include <sys/mman.h> |
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54 |
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55 |
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56 V4LVideoBuffer::V4LVideoBuffer(unsigned char *buffer, int fd, v4l2_buffer buf) |
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57 : QAbstractVideoBuffer(NoHandle) |
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58 , m_buffer(buffer) |
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59 , m_length(buf.bytesused) |
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60 , m_fd(fd) |
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61 , m_bytesPerLine(0) |
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62 , m_mode(NotMapped) |
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63 , m_buf(buf) |
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64 { |
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65 } |
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66 |
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67 V4LVideoBuffer::~V4LVideoBuffer() |
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68 { |
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69 ioctl(m_fd, VIDIOC_QBUF, &m_buf); |
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70 } |
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71 |
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72 void V4LVideoBuffer::setBytesPerLine(int bytesPerLine) |
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73 { |
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74 m_bytesPerLine = bytesPerLine; |
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75 } |
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76 |
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77 QAbstractVideoBuffer::MapMode V4LVideoBuffer::mapMode() const |
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78 { |
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79 return m_mode; |
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80 } |
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81 |
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82 uchar *V4LVideoBuffer::map(MapMode mode, int *numBytes, int *bytesPerLine) |
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83 { |
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84 if (mode != NotMapped && m_mode == NotMapped) { |
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85 if (numBytes) |
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86 *numBytes = m_length; |
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87 |
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88 m_mode = mode; |
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89 |
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90 if(bytesPerLine) |
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91 *bytesPerLine = m_bytesPerLine; |
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92 |
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93 return m_buffer; |
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94 } else { |
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95 return 0; |
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96 } |
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97 } |
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98 void V4LVideoBuffer::unmap() |
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99 { |
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100 m_mode = NotMapped; |
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101 } |
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102 |
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