1 | /* |
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2 | Copyright (C) 2005 by Jasem Mutlaq <mutlaqja@ikarustech.com> |
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3 | |
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4 | Based on V4L 2 Example |
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5 | http://v4l2spec.bytesex.org/spec-single/v4l2.html#CAPTURE-EXAMPLE |
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6 | |
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7 | This library is free software; you can redistribute it and/or |
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8 | modify it under the terms of the GNU Lesser General Public |
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9 | License as published by the Free Software Foundation; either |
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10 | version 2.1 of the License, or (at your option) any later version. |
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11 | |
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12 | This library is distributed in the hope that it will be useful, |
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13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 | Lesser General Public License for more details. |
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16 | |
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17 | You should have received a copy of the GNU Lesser General Public |
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18 | License along with this library; if not, write to the Free Software |
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19 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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20 | |
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21 | */ |
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22 | |
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23 | #ifndef V4L2_BASE_H |
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24 | #define V4L2_BASE_H |
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25 | |
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26 | #include <stdio.h> |
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27 | #include <stdlib.h> |
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28 | #include "videodev2.h" |
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29 | #include "eventloop.h" |
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30 | #include "indidevapi.h" |
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31 | |
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32 | #define VIDEO_COMPRESSION_LEVEL 4 |
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33 | |
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34 | class V4L2_Base |
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35 | { |
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36 | public: |
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37 | V4L2_Base(); |
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38 | virtual ~V4L2_Base(); |
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39 | |
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40 | typedef enum { IO_METHOD_READ, IO_METHOD_MMAP, IO_METHOD_USERPTR } io_method; |
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41 | |
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42 | struct buffer |
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43 | { |
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44 | void * start; |
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45 | size_t length; |
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46 | }; |
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47 | |
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48 | /* Connection */ |
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49 | virtual int connectCam(const char * devpath, char *errmsg, int pixelFormat = -1 , int width = -1, int height = -1); |
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50 | virtual void disconnectCam(); |
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51 | char * getDeviceName(); |
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52 | |
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53 | /* Image settings */ |
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54 | int getBrightness(); |
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55 | int getContrast(); |
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56 | int getColor(); |
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57 | int getHue(); |
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58 | int getWhiteness(); |
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59 | void setContrast(int val); |
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60 | void setBrightness(int val); |
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61 | void setColor(int val); |
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62 | void setHue(int val); |
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63 | void setWhiteness(int val); |
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64 | |
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65 | /* Updates */ |
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66 | void callFrame(void *p); |
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67 | void setPictureSettings(); |
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68 | void getPictureSettings(); |
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69 | |
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70 | /* Image Size */ |
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71 | int getWidth(); |
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72 | int getHeight(); |
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73 | virtual int setSize(int x, int y); |
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74 | virtual void getMaxMinSize(int & x_max, int & y_max, int & x_min, int & y_min); |
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75 | |
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76 | /* Frame rate */ |
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77 | void setFPS(int fps); |
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78 | int getFPS(); |
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79 | |
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80 | void allocBuffers(); |
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81 | unsigned char * getY(); |
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82 | unsigned char * getU(); |
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83 | unsigned char * getV(); |
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84 | unsigned char * getColorBuffer(); |
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85 | |
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86 | void registerCallback(WPF *fp, void *ud); |
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87 | |
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88 | int start_capturing(char *errmsg); |
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89 | int stop_capturing(char *errmsg); |
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90 | static void newFrame(int fd, void *p); |
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91 | |
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92 | void enumerate_ctrl (void); |
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93 | void enumerate_menu (void); |
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94 | int queryINTControls(INumberVectorProperty *nvp); |
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95 | int setINTControl(unsigned int ctrl_id, double new_value, char *errmsg); |
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96 | |
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97 | int query_ctrl(unsigned int ctrl_id, double & ctrl_min, double & ctrl_max, double & ctrl_step, double & ctrl_value, char *errmsg); |
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98 | |
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99 | protected: |
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100 | |
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101 | int xioctl(int fd, int request, void *arg); |
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102 | int read_frame(char *errsg); |
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103 | int uninit_device(char *errmsg); |
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104 | int open_device(const char *devpath, char *errmsg); |
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105 | int init_device(char *errmsg, int pixelFormat , int width, int height); |
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106 | int init_mmap(char *errmsg); |
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107 | int errno_exit(const char *s, char *errmsg); |
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108 | |
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109 | void close_device(void); |
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110 | void init_userp(unsigned int buffer_size); |
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111 | void init_read(unsigned int buffer_size); |
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112 | |
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113 | void findMinMax(); |
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114 | |
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115 | struct v4l2_capability cap; |
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116 | struct v4l2_cropcap cropcap; |
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117 | struct v4l2_crop crop; |
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118 | struct v4l2_format fmt; |
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119 | |
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120 | struct v4l2_queryctrl queryctrl; |
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121 | struct v4l2_querymenu querymenu; |
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122 | |
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123 | WPF *callback; |
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124 | void *uptr; |
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125 | char dev_name[64]; |
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126 | io_method io; |
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127 | int fd; |
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128 | struct buffer *buffers; |
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129 | unsigned int n_buffers; |
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130 | |
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131 | bool dropFrame; |
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132 | |
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133 | |
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134 | int frameRate; |
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135 | int xmax, xmin, ymax, ymin; |
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136 | int selectCallBackID; |
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137 | unsigned char * YBuf,*UBuf,*VBuf, *colorBuffer, *rgb24_buffer; |
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138 | |
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139 | }; |
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140 | |
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141 | #endif |
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