1 | /* GStreamer |
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2 | * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> |
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3 | * 2000 Wim Taymans <wtay@chello.be> |
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4 | * |
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5 | * gstplugin.h: Header for plugin subsystem |
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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 | |
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24 | #ifndef __GST_PLUGIN_H__ |
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25 | #define __GST_PLUGIN_H__ |
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26 | |
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27 | #include <gst/gstconfig.h> |
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28 | |
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29 | #include <gmodule.h> |
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30 | #include <gst/gstpluginfeature.h> |
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31 | #include <gst/gstmacros.h> |
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32 | |
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33 | G_BEGIN_DECLS |
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34 | |
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35 | GQuark gst_plugin_error_quark (void); |
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36 | #define GST_PLUGIN_ERROR gst_plugin_error_quark () |
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37 | |
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38 | typedef enum |
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39 | { |
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40 | GST_PLUGIN_ERROR_MODULE, |
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41 | GST_PLUGIN_ERROR_DEPENDENCIES, |
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42 | GST_PLUGIN_ERROR_NAME_MISMATCH |
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43 | } GstPluginError; |
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44 | |
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45 | #define GST_PLUGIN(plugin) ((GstPlugin *) (plugin)) |
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46 | |
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47 | typedef struct _GstPlugin GstPlugin; |
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48 | typedef struct _GstPluginDesc GstPluginDesc; |
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49 | |
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50 | /* Initialiser function: returns TRUE if plugin initialised successfully */ |
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51 | typedef gboolean (*GstPluginInitFunc) (GstPlugin *plugin); |
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52 | /* exiting function when plugin is unloaded */ |
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53 | typedef void (*GstPluginExitFunc) (GstPlugin *plugin); |
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54 | |
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55 | struct _GstPluginDesc { |
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56 | gint major_version; /* major version of core that plugin was compiled for */ |
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57 | gint minor_version; /* minor version of core that plugin was compiled for */ |
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58 | gchar *name; /* unique name of plugin */ |
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59 | gchar *description; /* description of plugin */ |
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60 | GstPluginInitFunc plugin_init; /* pointer to plugin_init function */ |
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61 | GstPluginExitFunc plugin_exit; /* pointer to exiting function */ |
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62 | gchar *version; /* version of the plugin */ |
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63 | gchar *license; /* effective license of plugin */ |
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64 | gchar *package; /* package plugin belongs to */ |
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65 | gchar *origin; /* URL to provider of plugin */ |
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66 | |
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67 | gpointer _gst_reserved[GST_PADDING]; |
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68 | }; |
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69 | |
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70 | struct _GstPlugin { |
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71 | GstPluginDesc desc; |
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72 | |
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73 | gchar * filename; |
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74 | GList * features; /* list of features provided */ |
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75 | gint numfeatures; |
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76 | |
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77 | gpointer manager; /* managing registry */ |
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78 | GModule * module; /* contains the module if plugin is loaded */ |
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79 | |
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80 | gpointer _gst_reserved[GST_PADDING]; |
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81 | }; |
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82 | |
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83 | #define GST_PLUGIN_DEFINE(major,minor,name,description,init,version,license,package,origin) \ |
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84 | GST_PLUGIN_EXPORT GstPluginDesc gst_plugin_desc = { \ |
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85 | major, \ |
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86 | minor, \ |
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87 | name, \ |
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88 | description, \ |
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89 | init, \ |
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90 | NULL, \ |
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91 | version, \ |
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92 | license, \ |
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93 | package, \ |
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94 | origin, \ |
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95 | GST_PADDING_INIT \ |
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96 | }; |
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97 | |
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98 | #define GST_PLUGIN_DEFINE_STATIC(major,minor,name,description,init,version,license,package,origin) \ |
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99 | static void GST_GNUC_CONSTRUCTOR \ |
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100 | _gst_plugin_static_init__ ##init (void) \ |
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101 | { \ |
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102 | static GstPluginDesc plugin_desc_ = { \ |
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103 | major, \ |
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104 | minor, \ |
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105 | name, \ |
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106 | description, \ |
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107 | init, \ |
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108 | NULL, \ |
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109 | version, \ |
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110 | license, \ |
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111 | package, \ |
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112 | origin, \ |
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113 | GST_PADDING_INIT \ |
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114 | }; \ |
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115 | _gst_plugin_register_static (&plugin_desc_); \ |
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116 | } |
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117 | |
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118 | #define GST_LICENSE_UNKNOWN "unknown" |
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119 | |
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120 | |
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121 | /* function for filters */ |
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122 | typedef gboolean (*GstPluginFilter) (GstPlugin *plugin, |
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123 | gpointer user_data); |
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124 | |
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125 | #define GST_TYPE_PLUGIN (gst_plugin_get_type()) |
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126 | GType gst_plugin_get_type (void); |
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127 | void _gst_plugin_initialize (void); |
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128 | void _gst_plugin_register_static (GstPluginDesc *desc); |
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129 | |
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130 | G_CONST_RETURN gchar* gst_plugin_get_name (GstPlugin *plugin); |
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131 | G_CONST_RETURN gchar* gst_plugin_get_description (GstPlugin *plugin); |
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132 | G_CONST_RETURN gchar* gst_plugin_get_filename (GstPlugin *plugin); |
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133 | G_CONST_RETURN gchar* gst_plugin_get_version (GstPlugin *plugin); |
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134 | G_CONST_RETURN gchar* gst_plugin_get_license (GstPlugin *plugin); |
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135 | G_CONST_RETURN gchar* gst_plugin_get_package (GstPlugin *plugin); |
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136 | G_CONST_RETURN gchar* gst_plugin_get_origin (GstPlugin *plugin); |
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137 | GModule * gst_plugin_get_module (GstPlugin *plugin); |
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138 | gboolean gst_plugin_is_loaded (GstPlugin *plugin); |
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139 | |
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140 | GList* gst_plugin_feature_filter (GstPlugin *plugin, |
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141 | GstPluginFeatureFilter filter, |
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142 | gboolean first, |
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143 | gpointer user_data); |
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144 | GList* gst_plugin_list_feature_filter (GList *list, |
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145 | GstPluginFeatureFilter filter, |
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146 | gboolean first, |
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147 | gpointer user_data); |
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148 | gboolean gst_plugin_name_filter (GstPlugin *plugin, const gchar *name); |
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149 | |
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150 | GList* gst_plugin_get_feature_list (GstPlugin *plugin); |
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151 | GstPluginFeature* gst_plugin_find_feature (GstPlugin *plugin, const gchar *name, GType type); |
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152 | |
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153 | gboolean gst_plugin_check_file (const gchar *filename, GError** error); |
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154 | GstPlugin * gst_plugin_load_file (const gchar *filename, GError** error); |
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155 | gboolean gst_plugin_unload_plugin (GstPlugin *plugin); |
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156 | |
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157 | void gst_plugin_add_feature (GstPlugin *plugin, GstPluginFeature *feature); |
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158 | |
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159 | /* shortcuts to load from the registry pool */ |
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160 | gboolean gst_plugin_load (const gchar *name); |
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161 | gboolean gst_library_load (const gchar *name); |
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162 | |
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163 | G_END_DECLS |
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164 | |
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165 | #endif /* __GST_PLUGIN_H__ */ |
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