1 /* GStreamer |
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2 * |
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3 * gstv4lelement.h: base class for V4L elements |
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4 * |
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5 * Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net> |
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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 Library General Public |
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9 * License as published by the Free Software Foundation; either |
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10 * version 2 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 * Library 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 Library General Public |
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18 * License along with this library; if not, write to the |
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19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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20 * Boston, MA 02111-1307, USA. |
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21 */ |
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22 |
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23 #ifndef __GST_V4LELEMENT_H__ |
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24 #define __GST_V4LELEMENT_H__ |
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25 |
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26 /* Because of some really cool feature in video4linux1, also known as |
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27 * 'not including sys/types.h and sys/time.h', we had to include it |
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28 * ourselves. In all their intelligence, these people decided to fix |
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29 * this in the next version (video4linux2) in such a cool way that it |
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30 * breaks all compilations of old stuff... |
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31 * The real problem is actually that linux/time.h doesn't use proper |
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32 * macro checks before defining types like struct timeval. The proper |
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33 * fix here is to either fuck the kernel header (which is what we do |
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34 * by defining _LINUX_TIME_H, an innocent little hack) or by fixing it |
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35 * upstream, which I'll consider doing later on. If you get compiler |
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36 * errors here, check your linux/time.h && sys/time.h header setup. |
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37 */ |
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38 #include <sys/types.h> |
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39 #define _LINUX_TIME_H |
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40 #include <linux/videodev.h> |
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41 |
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42 #include <gst/gst.h> |
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43 #include <gst/base/gstpushsrc.h> |
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44 |
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45 |
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46 G_BEGIN_DECLS |
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47 |
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48 #define GST_TYPE_V4LELEMENT \ |
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49 (gst_v4lelement_get_type()) |
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50 #define GST_V4LELEMENT(obj) \ |
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51 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4LELEMENT,GstV4lElement)) |
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52 #define GST_V4LELEMENT_CLASS(klass) \ |
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53 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4LELEMENT,GstV4lElementClass)) |
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54 #define GST_IS_V4LELEMENT(obj) \ |
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55 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4LELEMENT)) |
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56 #define GST_IS_V4LELEMENT_CLASS(klass) \ |
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57 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4LELEMENT)) |
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58 #define GST_V4LELEMENT_GET_CLASS(klass) \ |
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59 (G_TYPE_INSTANCE_GET_CLASS ((klass), GST_TYPE_V4LELEMENT, GstV4lElementClass)) |
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60 |
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61 typedef struct _GstV4lElement GstV4lElement; |
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62 typedef struct _GstV4lElementClass GstV4lElementClass; |
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63 typedef struct _GstV4lXv GstV4lXv; |
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64 |
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65 struct _GstV4lElement { |
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66 GstPushSrc element; |
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67 |
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68 /* the video device */ |
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69 char *videodev; |
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70 |
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71 /* the video-device's file descriptor */ |
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72 gint video_fd; |
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73 |
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74 /* the video buffer (mmap()'ed) */ |
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75 guint8 *buffer; |
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76 |
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77 /* the video device's capabilities */ |
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78 struct video_capability vcap; |
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79 |
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80 /* the video device's window properties */ |
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81 struct video_window vwin; |
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82 |
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83 /* some more info about the current input's capabilities */ |
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84 struct video_channel vchan; |
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85 |
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86 /* lists... */ |
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87 GList *colors; |
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88 GList *norms; |
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89 GList *channels; |
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90 |
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91 /* X-overlay */ |
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92 GstV4lXv *xv; |
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93 gulong xwindow_id; |
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94 }; |
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95 |
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96 struct _GstV4lElementClass { |
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97 GstPushSrcClass parent_class; |
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98 |
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99 /* probed devices */ |
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100 GList *devices; |
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101 |
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102 /* actions */ |
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103 gboolean (*get_attribute) (GstElement *element, |
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104 const gchar *attr_name, |
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105 int *value); |
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106 gboolean (*set_attribute) (GstElement *element, |
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107 const gchar *attr_name, |
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108 const int value); |
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109 }; |
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110 |
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111 GType gst_v4lelement_get_type(void); |
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112 |
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113 |
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114 G_END_DECLS |
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115 |
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116 #endif /* __GST_V4LELEMENT_H__ */ |
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