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1 /* GStreamer |
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2 * Copyright (C) <2005> Julien Moutte <julien@moutte.net> |
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3 * |
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4 * This library is free software; you can redistribute it and/or |
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5 * modify it under the terms of the GNU Library General Public |
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6 * License as published by the Free Software Foundation; either |
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7 * version 2 of the License, or (at your option) any later version. |
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8 * |
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9 * This library is distributed in the hope that it will be useful, |
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10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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12 * Library General Public License for more details. |
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13 * |
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14 * You should have received a copy of the GNU Library General Public |
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15 * License along with this library; if not, write to the |
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16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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17 * Boston, MA 02111-1307, USA. |
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18 */ |
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19 |
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20 #ifndef __GST_XIMAGESINK_H__ |
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21 #define __GST_XIMAGESINK_H__ |
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22 |
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23 #include <gst/video/gstvideosink.h> |
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24 |
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25 #ifdef HAVE_XSHM |
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26 #include <sys/types.h> |
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27 #include <sys/ipc.h> |
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28 #include <sys/shm.h> |
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29 #endif /* HAVE_XSHM */ |
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30 |
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31 #include <X11/Xlib.h> |
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32 #include <X11/Xutil.h> |
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33 |
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34 #ifdef HAVE_XSHM |
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35 #include <X11/extensions/XShm.h> |
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36 #endif /* HAVE_XSHM */ |
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37 |
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38 #include <string.h> |
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39 #include <math.h> |
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40 |
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41 G_BEGIN_DECLS |
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42 |
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43 #define GST_TYPE_XIMAGESINK \ |
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44 (gst_ximagesink_get_type()) |
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45 #define GST_XIMAGESINK(obj) \ |
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46 (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_XIMAGESINK, GstXImageSink)) |
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47 #define GST_XIMAGESINK_CLASS(klass) \ |
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48 (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_XIMAGESINK, GstXImageSinkClass)) |
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49 #define GST_IS_XIMAGESINK(obj) \ |
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50 (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_XIMAGESINK)) |
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51 #define GST_IS_XIMAGESINK_CLASS(klass) \ |
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52 (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_XIMAGESINK)) |
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53 |
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54 typedef struct _GstXContext GstXContext; |
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55 typedef struct _GstXWindow GstXWindow; |
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56 |
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57 typedef struct _GstXImageBuffer GstXImageBuffer; |
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58 typedef struct _GstXImageBufferClass GstXImageBufferClass; |
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59 |
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60 typedef struct _GstXImageSink GstXImageSink; |
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61 typedef struct _GstXImageSinkClass GstXImageSinkClass; |
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62 |
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63 /** |
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64 * GstXContext: |
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65 * @disp: the X11 Display of this context |
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66 * @screen: the default Screen of Display @disp |
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67 * @screen_num: the Screen number of @screen |
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68 * @visual: the default Visual of Screen @screen |
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69 * @root: the root Window of Display @disp |
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70 * @white: the value of a white pixel on Screen @screen |
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71 * @black: the value of a black pixel on Screen @screen |
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72 * @depth: the color depth of Display @disp |
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73 * @bpp: the number of bits per pixel on Display @disp |
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74 * @endianness: the endianness of image bytes on Display @disp |
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75 * @width: the width in pixels of Display @disp |
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76 * @height: the height in pixels of Display @disp |
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77 * @widthmm: the width in millimeters of Display @disp |
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78 * @heightmm: the height in millimeters of Display @disp |
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79 * @par: the pixel aspect ratio calculated from @width, @widthmm and @height, |
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80 * @heightmm ratio |
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81 * @use_xshm: used to known wether of not XShm extension is usable or not even |
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82 * if the Extension is present |
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83 * @caps: the #GstCaps that Display @disp can accept |
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84 * |
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85 * Structure used to store various informations collected/calculated for a |
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86 * Display. |
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87 */ |
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88 struct _GstXContext { |
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89 Display *disp; |
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90 |
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91 Screen *screen; |
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92 gint screen_num; |
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93 |
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94 Visual *visual; |
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95 |
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96 Window root; |
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97 |
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98 gulong white, black; |
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99 |
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100 gint depth; |
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101 gint bpp; |
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102 gint endianness; |
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103 |
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104 gint width, height; |
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105 gint widthmm, heightmm; |
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106 GValue *par; /* calculated pixel aspect ratio */ |
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107 |
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108 gboolean use_xshm; |
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109 |
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110 GstCaps *caps; |
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111 }; |
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112 |
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113 /** |
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114 * GstXWindow: |
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115 * @win: the Window ID of this X11 window |
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116 * @width: the width in pixels of Window @win |
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117 * @height: the height in pixels of Window @win |
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118 * @internal: used to remember if Window @win was created internally or passed |
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119 * through the #GstXOverlay interface |
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120 * @gc: the Graphical Context of Window @win |
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121 * |
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122 * Structure used to store informations about a Window. |
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123 */ |
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124 struct _GstXWindow { |
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125 Window win; |
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126 gint width, height; |
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127 gboolean internal; |
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128 GC gc; |
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129 }; |
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130 |
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131 /** |
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132 * GstXImageBuffer: |
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133 * @ximagesink: a reference to our #GstXImageSink |
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134 * @ximage: the XImage of this buffer |
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135 * @width: the width in pixels of XImage @ximage |
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136 * @height: the height in pixels of XImage @ximage |
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137 * @size: the size in bytes of XImage @ximage |
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138 * |
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139 * Subclass of #GstBuffer containing additional information about an XImage. |
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140 */ |
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141 struct _GstXImageBuffer { |
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142 GstBuffer buffer; |
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143 |
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144 /* Reference to the ximagesink we belong to */ |
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145 GstXImageSink *ximagesink; |
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146 |
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147 XImage *ximage; |
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148 |
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149 #ifdef HAVE_XSHM |
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150 XShmSegmentInfo SHMInfo; |
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151 #endif /* HAVE_XSHM */ |
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152 |
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153 gint width, height; |
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154 size_t size; |
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155 }; |
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156 |
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157 /** |
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158 * GstXImageSink: |
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159 * @display_name: the name of the Display we want to render to |
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160 * @xcontext: our instance's #GstXContext |
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161 * @xwindow: the #GstXWindow we are rendering to |
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162 * @ximage: internal #GstXImage used to store incoming buffers and render when |
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163 * not using the buffer_alloc optimization mechanism |
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164 * @cur_image: a reference to the last #GstXImage that was put to @xwindow. It |
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165 * is used when Expose events are received to redraw the latest video frame |
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166 * @event_thread: a thread listening for events on @xwindow and handling them |
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167 * @running: used to inform @event_thread if it should run/shutdown |
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168 * @fps_n: the framerate fraction numerator |
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169 * @fps_d: the framerate fraction denominator |
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170 * @x_lock: used to protect X calls as we are not using the XLib in threaded |
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171 * mode |
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172 * @flow_lock: used to protect data flow routines from external calls such as |
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173 * events from @event_thread or methods from the #GstXOverlay interface |
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174 * @par: used to override calculated pixel aspect ratio from @xcontext |
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175 * @pool_lock: used to protect the buffer pool |
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176 * @buffer_pool: a list of #GstXImageBuffer that could be reused at next buffer |
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177 * allocation call |
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178 * @synchronous: used to store if XSynchronous should be used or not (for |
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179 * debugging purpose only) |
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180 * @keep_aspect: used to remember if reverse negotiation scaling should respect |
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181 * aspect ratio |
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182 * @handle_events: used to know if we should handle select XEvents or not |
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183 * |
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184 * The #GstXImageSink data structure. |
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185 */ |
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186 struct _GstXImageSink { |
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187 /* Our element stuff */ |
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188 GstVideoSink videosink; |
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189 |
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190 char *display_name; |
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191 |
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192 GstXContext *xcontext; |
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193 GstXWindow *xwindow; |
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194 GstXImageBuffer *ximage; |
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195 GstXImageBuffer *cur_image; |
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196 |
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197 GThread *event_thread; |
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198 gboolean running; |
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199 |
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200 /* Framerate numerator and denominator */ |
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201 gint fps_n; |
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202 gint fps_d; |
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203 |
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204 GMutex *x_lock; |
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205 GMutex *flow_lock; |
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206 |
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207 /* object-set pixel aspect ratio */ |
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208 GValue *par; |
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209 |
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210 GMutex *pool_lock; |
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211 GSList *buffer_pool; |
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212 |
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213 gboolean synchronous; |
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214 gboolean keep_aspect; |
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215 gboolean handle_events; |
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216 gboolean handle_expose; |
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217 }; |
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218 |
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219 struct _GstXImageSinkClass { |
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220 GstVideoSinkClass parent_class; |
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221 }; |
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222 |
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223 GType gst_ximagesink_get_type(void); |
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224 |
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225 G_END_DECLS |
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226 |
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227 #endif /* __GST_XIMAGESINK_H__ */ |