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 | * gstelement.h: Header for GstElement |
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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_ELEMENT_H__ |
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25 | #define __GST_ELEMENT_H__ |
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26 | |
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27 | #include <gst/gstconfig.h> |
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28 | #include <gst/gsttypes.h> |
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29 | #include <gst/gstobject.h> |
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30 | #include <gst/gstpad.h> |
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31 | #include <gst/gstclock.h> |
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32 | #include <gst/gstplugin.h> |
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33 | #include <gst/gstpluginfeature.h> |
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34 | #include <gst/gstindex.h> |
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35 | #include <gst/gsttag.h> |
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36 | |
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37 | G_BEGIN_DECLS |
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38 | |
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39 | typedef struct _GstElementDetails GstElementDetails; |
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40 | |
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41 | /* FIXME: need translatable stuff in here (how handle in registry)? */ |
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42 | struct _GstElementDetails { |
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43 | gchar *longname; /* long, english name */ |
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44 | gchar *klass; /* type of element, as hierarchy */ |
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45 | gchar *description; /* insights of one form or another */ |
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46 | gchar *author; /* who wrote this thing? */ |
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47 | |
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48 | gpointer _gst_reserved[GST_PADDING]; |
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49 | }; |
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50 | #define GST_ELEMENT_DETAILS(longname,klass,description,author) \ |
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51 | { longname, klass, description, author, GST_PADDING_INIT } |
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52 | #define GST_IS_ELEMENT_DETAILS(details) ( \ |
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53 | (details) && ((details)->longname != NULL) && ((details)->klass != NULL) \ |
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54 | && ((details)->description != NULL) && ((details)->author != NULL)) |
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55 | |
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56 | #define GST_NUM_STATES 4 |
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57 | |
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58 | /* NOTE: this probably should be done with an #ifdef to decide |
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59 | * whether to safe-cast or to just do the non-checking cast. |
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60 | */ |
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61 | #define GST_STATE(obj) (GST_ELEMENT(obj)->current_state) |
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62 | #define GST_STATE_PENDING(obj) (GST_ELEMENT(obj)->pending_state) |
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63 | |
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64 | /* Note: using 8 bit shift mostly "just because", it leaves us enough room to grow <g> */ |
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65 | #define GST_STATE_TRANSITION(obj) ((GST_STATE(obj)<<8) | GST_STATE_PENDING(obj)) |
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66 | #define GST_STATE_NULL_TO_READY ((GST_STATE_NULL<<8) | GST_STATE_READY) |
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67 | #define GST_STATE_READY_TO_PAUSED ((GST_STATE_READY<<8) | GST_STATE_PAUSED) |
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68 | #define GST_STATE_PAUSED_TO_PLAYING ((GST_STATE_PAUSED<<8) | GST_STATE_PLAYING) |
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69 | #define GST_STATE_PLAYING_TO_PAUSED ((GST_STATE_PLAYING<<8) | GST_STATE_PAUSED) |
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70 | #define GST_STATE_PAUSED_TO_READY ((GST_STATE_PAUSED<<8) | GST_STATE_READY) |
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71 | #define GST_STATE_READY_TO_NULL ((GST_STATE_READY<<8) | GST_STATE_NULL) |
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72 | |
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73 | GST_EXPORT GType _gst_element_type; |
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74 | |
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75 | #define GST_TYPE_ELEMENT (_gst_element_type) |
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76 | #define GST_IS_ELEMENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_ELEMENT)) |
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77 | #define GST_IS_ELEMENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_ELEMENT)) |
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78 | #define GST_ELEMENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_ELEMENT, GstElementClass)) |
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79 | #define GST_ELEMENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_ELEMENT, GstElement)) |
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80 | #define GST_ELEMENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_ELEMENT, GstElementClass)) |
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81 | |
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82 | /* convenience functions */ |
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83 | #ifndef GST_DISABLE_DEPRECATED |
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84 | #ifdef G_HAVE_ISO_VARARGS |
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85 | #define GST_ELEMENT_QUERY_TYPE_FUNCTION(functionname, ...) \ |
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86 | GST_QUERY_TYPE_FUNCTION (GstElement*, functionname, __VA_ARGS__); |
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87 | #define GST_ELEMENT_FORMATS_FUNCTION(functionname, ...) \ |
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88 | GST_FORMATS_FUNCTION (GstElement*, functionname, __VA_ARGS__); |
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89 | #define GST_ELEMENT_EVENT_MASK_FUNCTION(functionname, ...) \ |
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90 | GST_EVENT_MASK_FUNCTION (GstElement*, functionname, __VA_ARGS__); |
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91 | #elif defined(G_HAVE_GNUC_VARARGS) |
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92 | #define GST_ELEMENT_QUERY_TYPE_FUNCTION(functionname, a...) \ |
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93 | GST_QUERY_TYPE_FUNCTION (GstElement*, functionname, a); |
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94 | #define GST_ELEMENT_FORMATS_FUNCTION(functionname, a...) \ |
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95 | GST_FORMATS_FUNCTION (GstElement*, functionname, a); |
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96 | #define GST_ELEMENT_EVENT_MASK_FUNCTION(functionname, a...) \ |
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97 | GST_EVENT_MASK_FUNCTION (GstElement*, functionname, a); |
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98 | #endif |
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99 | #endif |
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100 | |
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101 | typedef enum { |
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102 | /* element is complex (for some def.) and generally require a cothread */ |
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103 | GST_ELEMENT_COMPLEX = GST_OBJECT_FLAG_LAST, |
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104 | /* input and output pads aren't directly coupled to each other |
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105 | examples: queues, multi-output async readers, etc. */ |
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106 | GST_ELEMENT_DECOUPLED, |
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107 | /* this element should be placed in a thread if at all possible */ |
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108 | GST_ELEMENT_THREAD_SUGGESTED, |
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109 | /* this element, for some reason, has a loop function that performs |
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110 | * an infinite loop without calls to gst_element_yield () */ |
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111 | GST_ELEMENT_INFINITE_LOOP, |
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112 | /* there is a new loopfunction ready for placement */ |
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113 | GST_ELEMENT_NEW_LOOPFUNC, |
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114 | /* if this element can handle events */ |
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115 | GST_ELEMENT_EVENT_AWARE, |
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116 | /* use threadsafe property get/set implementation */ |
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117 | GST_ELEMENT_USE_THREADSAFE_PROPERTIES, |
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118 | |
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119 | /* private flags that can be used by the scheduler */ |
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120 | GST_ELEMENT_SCHEDULER_PRIVATE1, |
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121 | GST_ELEMENT_SCHEDULER_PRIVATE2, |
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122 | |
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123 | /* ignore state changes from parent */ |
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124 | GST_ELEMENT_LOCKED_STATE, |
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125 | |
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126 | /* element is in error */ |
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127 | GST_ELEMENT_IN_ERROR, |
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128 | |
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129 | /* use some padding for future expansion */ |
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130 | GST_ELEMENT_FLAG_LAST = GST_OBJECT_FLAG_LAST + 16 |
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131 | } GstElementFlags; |
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132 | |
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133 | #define GST_ELEMENT_IS_THREAD_SUGGESTED(obj) (GST_FLAG_IS_SET(obj,GST_ELEMENT_THREAD_SUGGESTED)) |
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134 | #define GST_ELEMENT_IS_EVENT_AWARE(obj) (GST_FLAG_IS_SET(obj,GST_ELEMENT_EVENT_AWARE)) |
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135 | #define GST_ELEMENT_IS_DECOUPLED(obj) (GST_FLAG_IS_SET(obj,GST_ELEMENT_DECOUPLED)) |
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136 | |
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137 | #define GST_ELEMENT_NAME(obj) (GST_OBJECT_NAME(obj)) |
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138 | #define GST_ELEMENT_PARENT(obj) (GST_OBJECT_PARENT(obj)) |
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139 | #define GST_ELEMENT_SCHED(obj) (((GstElement*)(obj))->sched) |
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140 | #define GST_ELEMENT_CLOCK(obj) (((GstElement*)(obj))->clock) |
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141 | #define GST_ELEMENT_PADS(obj) ((obj)->pads) |
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142 | |
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143 | /** |
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144 | * GST_ELEMENT_ERROR: |
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145 | * @el: the element that throws the error |
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146 | * @domain: like CORE, LIBRARY, RESOURCE or STREAM (see #GstError) |
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147 | * @code: error code defined for that domain (see #GstError) |
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148 | * @message: the message to display (format string and args enclosed in round brackets) |
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149 | * @debug: debugging information for the message (format string and args enclosed in round brackets) |
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150 | * |
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151 | * Utility function that elements can use in case they encountered a fatal |
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152 | * data processing error. The pipeline will throw an error signal and the |
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153 | * application will be requested to stop further media processing. |
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154 | */ |
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155 | #define GST_ELEMENT_ERROR(el, domain, code, message, debug) G_STMT_START { \ |
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156 | gchar *__msg = _gst_element_error_printf message; \ |
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157 | gchar *__dbg = _gst_element_error_printf debug; \ |
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158 | if (__msg) \ |
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159 | GST_ERROR_OBJECT (el, "%s", __msg); \ |
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160 | if (__dbg) \ |
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161 | GST_ERROR_OBJECT (el, "%s", __dbg); \ |
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162 | gst_element_error_full (GST_ELEMENT(el), \ |
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163 | GST_ ## domain ## _ERROR, GST_ ## domain ## _ERROR_ ## code, \ |
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164 | __msg, __dbg, __FILE__, GST_FUNCTION, __LINE__); \ |
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165 | } G_STMT_END |
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166 | |
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167 | typedef struct _GstElementFactory GstElementFactory; |
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168 | typedef struct _GstElementFactoryClass GstElementFactoryClass; |
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169 | |
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170 | typedef void (*GstElementLoopFunction) (GstElement *element); |
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171 | typedef void (*GstElementPreRunFunction) (GstElement *element); |
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172 | typedef void (*GstElementPostRunFunction) (GstElement *element); |
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173 | |
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174 | struct _GstElement { |
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175 | GstObject object; |
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176 | |
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177 | /* element state and scheduling */ |
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178 | guint8 current_state; |
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179 | guint8 pending_state; |
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180 | GstElementLoopFunction loopfunc; |
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181 | |
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182 | GstScheduler *sched; |
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183 | gpointer sched_private; |
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184 | |
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185 | /* allocated clock */ |
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186 | GstClock *clock; |
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187 | GstClockTimeDiff base_time; /* NULL/READY: 0 - PAUSED: current time - PLAYING: difference to clock */ |
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188 | |
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189 | /* element pads */ |
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190 | guint16 numpads; |
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191 | guint16 numsrcpads; |
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192 | guint16 numsinkpads; |
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193 | GList *pads; |
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194 | |
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195 | GMutex *state_mutex; |
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196 | GCond *state_cond; |
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197 | |
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198 | GstElementPreRunFunction pre_run_func; |
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199 | GstElementPostRunFunction post_run_func; |
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200 | GAsyncQueue *prop_value_queue; |
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201 | GMutex *property_mutex; |
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202 | |
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203 | gpointer _gst_reserved[GST_PADDING]; |
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204 | }; |
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205 | |
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206 | struct _GstElementClass { |
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207 | GstObjectClass parent_class; |
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208 | |
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209 | /* the element details */ |
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210 | GstElementDetails details; |
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211 | |
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212 | /* factory that the element was created from */ |
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213 | GstElementFactory *elementfactory; |
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214 | |
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215 | /* templates for our pads */ |
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216 | GList *padtemplates; |
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217 | gint numpadtemplates; |
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218 | |
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219 | /* signal callbacks */ |
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220 | void (*state_change) (GstElement *element, GstElementState old, GstElementState state); |
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221 | void (*new_pad) (GstElement *element, GstPad *pad); |
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222 | void (*pad_removed) (GstElement *element, GstPad *pad); |
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223 | void (*error) (GstElement *element, GstElement *source, GError *error, gchar *debug); |
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224 | void (*eos) (GstElement *element); |
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225 | void (*found_tag) (GstElement *element, GstElement *source, const GstTagList *tag_list); |
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226 | |
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227 | /* local pointers for get/set */ |
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228 | void (*set_property) (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); |
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229 | void (*get_property) (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); |
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230 | |
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231 | /* vtable*/ |
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232 | gboolean (*release_locks) (GstElement *element); |
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233 | |
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234 | /* query/convert/events functions */ |
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235 | const GstEventMask* (*get_event_masks) (GstElement *element); |
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236 | gboolean (*send_event) (GstElement *element, GstEvent *event); |
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237 | const GstFormat* (*get_formats) (GstElement *element); |
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238 | gboolean (*convert) (GstElement *element, |
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239 | GstFormat src_format, gint64 src_value, |
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240 | GstFormat *dest_format, gint64 *dest_value); |
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241 | const GstQueryType* (*get_query_types) (GstElement *element); |
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242 | gboolean (*query) (GstElement *element, GstQueryType type, |
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243 | GstFormat *format, gint64 *value); |
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244 | |
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245 | /* change the element state */ |
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246 | GstElementStateReturn (*change_state) (GstElement *element); |
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247 | |
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248 | /* request/release pads */ |
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249 | GstPad* (*request_new_pad) (GstElement *element, GstPadTemplate *templ, const gchar* name); |
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250 | void (*release_pad) (GstElement *element, GstPad *pad); |
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251 | |
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252 | /* set/get clocks */ |
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253 | GstClock* (*get_clock) (GstElement *element); |
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254 | void (*set_clock) (GstElement *element, GstClock *clock); |
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255 | |
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256 | /* index */ |
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257 | GstIndex* (*get_index) (GstElement *element); |
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258 | void (*set_index) (GstElement *element, GstIndex *index); |
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259 | |
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260 | GstElementStateReturn (*set_state) (GstElement *element, GstElementState state); |
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261 | |
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262 | /* FIXME 0.9: move up to signals */ |
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263 | void (*no_more_pads) (GstElement *element); |
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264 | |
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265 | gpointer _gst_reserved[GST_PADDING - 1]; |
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266 | }; |
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267 | |
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268 | void gst_element_class_add_pad_template (GstElementClass *klass, GstPadTemplate *templ); |
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269 | void gst_element_class_install_std_props (GstElementClass *klass, |
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270 | const gchar *first_name, ...); |
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271 | void gst_element_class_set_details (GstElementClass *klass, |
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272 | const GstElementDetails *details); |
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273 | |
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274 | #define gst_element_default_deep_notify gst_object_default_deep_notify |
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275 | |
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276 | void gst_element_default_error (GObject *object, GstObject *orig, GError *error, gchar *debug); |
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277 | |
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278 | GType gst_element_get_type (void); |
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279 | void gst_element_set_loop_function (GstElement *element, |
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280 | GstElementLoopFunction loop); |
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281 | |
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282 | #define gst_element_get_name(elem) gst_object_get_name(GST_OBJECT(elem)) |
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283 | #define gst_element_set_name(elem,name) gst_object_set_name(GST_OBJECT(elem),name) |
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284 | #define gst_element_get_parent(elem) gst_object_get_parent(GST_OBJECT(elem)) |
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285 | #define gst_element_set_parent(elem,parent) gst_object_set_parent(GST_OBJECT(elem),parent) |
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286 | |
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287 | /* threadsafe versions of their g_object_* counterparts */ |
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288 | void gst_element_set (GstElement *element, const gchar *first_property_name, ...); |
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289 | void gst_element_get (GstElement *element, const gchar *first_property_name, ...); |
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290 | void gst_element_set_valist (GstElement *element, const gchar *first_property_name, |
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291 | va_list var_args); |
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292 | void gst_element_get_valist (GstElement *element, const gchar *first_property_name, |
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293 | va_list var_args); |
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294 | void gst_element_set_property (GstElement *element, const gchar *property_name, |
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295 | const GValue *value); |
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296 | void gst_element_get_property (GstElement *element, const gchar *property_name, |
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297 | GValue *value); |
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298 | |
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299 | void gst_element_enable_threadsafe_properties (GstElement *element); |
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300 | void gst_element_disable_threadsafe_properties (GstElement *element); |
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301 | void gst_element_set_pending_properties (GstElement *element); |
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302 | |
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303 | /* clocking */ |
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304 | gboolean gst_element_requires_clock (GstElement *element); |
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305 | gboolean gst_element_provides_clock (GstElement *element); |
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306 | GstClock* gst_element_get_clock (GstElement *element); |
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307 | void gst_element_set_clock (GstElement *element, GstClock *clock); |
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308 | GstClockReturn gst_element_clock_wait (GstElement *element, |
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309 | GstClockID id, GstClockTimeDiff *jitter); |
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310 | GstClockTime gst_element_get_time (GstElement *element); |
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311 | gboolean gst_element_wait (GstElement *element, GstClockTime timestamp); |
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312 | void gst_element_set_time (GstElement *element, GstClockTime time); |
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313 | void gst_element_set_time_delay (GstElement *element, GstClockTime time, GstClockTime delay); |
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314 | |
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315 | void gst_element_adjust_time (GstElement *element, GstClockTimeDiff diff); |
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316 | |
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317 | /* indexs */ |
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318 | gboolean gst_element_is_indexable (GstElement *element); |
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319 | void gst_element_set_index (GstElement *element, GstIndex *index); |
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320 | GstIndex* gst_element_get_index (GstElement *element); |
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321 | |
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322 | |
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323 | gboolean gst_element_release_locks (GstElement *element); |
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324 | |
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325 | void gst_element_yield (GstElement *element); |
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326 | gboolean gst_element_interrupt (GstElement *element); |
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327 | void gst_element_set_scheduler (GstElement *element, GstScheduler *sched); |
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328 | GstScheduler* gst_element_get_scheduler (GstElement *element); |
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329 | |
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330 | void gst_element_add_pad (GstElement *element, GstPad *pad); |
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331 | void gst_element_remove_pad (GstElement *element, GstPad *pad); |
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332 | GstPad * gst_element_add_ghost_pad (GstElement *element, GstPad *pad, const gchar *name); |
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333 | #ifndef GST_DISABLE_DEPRECATED |
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334 | void gst_element_remove_ghost_pad (GstElement *element, GstPad *pad); |
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335 | #endif |
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336 | void gst_element_no_more_pads (GstElement *element); |
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337 | |
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338 | GstPad* gst_element_get_pad (GstElement *element, const gchar *name); |
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339 | GstPad* gst_element_get_static_pad (GstElement *element, const gchar *name); |
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340 | GstPad* gst_element_get_request_pad (GstElement *element, const gchar *name); |
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341 | void gst_element_release_request_pad (GstElement *element, GstPad *pad); |
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342 | |
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343 | G_CONST_RETURN GList* |
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344 | gst_element_get_pad_list (GstElement *element); |
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345 | GstPad* gst_element_get_compatible_pad (GstElement *element, GstPad *pad); |
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346 | GstPad* gst_element_get_compatible_pad_filtered (GstElement *element, GstPad *pad, |
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347 | const GstCaps *filtercaps); |
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348 | |
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349 | GstPadTemplate* gst_element_class_get_pad_template (GstElementClass *element_class, const gchar *name); |
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350 | GList* gst_element_class_get_pad_template_list (GstElementClass *element_class); |
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351 | GstPadTemplate* gst_element_get_pad_template (GstElement *element, const gchar *name); |
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352 | GList* gst_element_get_pad_template_list (GstElement *element); |
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353 | GstPadTemplate* gst_element_get_compatible_pad_template (GstElement *element, GstPadTemplate *compattempl); |
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354 | |
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355 | gboolean gst_element_link (GstElement *src, GstElement *dest); |
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356 | gboolean gst_element_link_many (GstElement *element_1, |
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357 | GstElement *element_2, ...); |
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358 | gboolean gst_element_link_filtered (GstElement *src, GstElement *dest, |
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359 | const GstCaps *filtercaps); |
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360 | void gst_element_unlink (GstElement *src, GstElement *dest); |
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361 | void gst_element_unlink_many (GstElement *element_1, |
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362 | GstElement *element_2, ...); |
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363 | |
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364 | gboolean gst_element_link_pads (GstElement *src, const gchar *srcpadname, |
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365 | GstElement *dest, const gchar *destpadname); |
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366 | gboolean gst_element_link_pads_filtered (GstElement *src, const gchar *srcpadname, |
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367 | GstElement *dest, const gchar *destpadname, |
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368 | const GstCaps *filtercaps); |
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369 | void gst_element_unlink_pads (GstElement *src, const gchar *srcpadname, |
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370 | GstElement *dest, const gchar *destpadname); |
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371 | |
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372 | G_CONST_RETURN GstEventMask* |
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373 | gst_element_get_event_masks (GstElement *element); |
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374 | gboolean gst_element_send_event (GstElement *element, GstEvent *event); |
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375 | gboolean gst_element_seek (GstElement *element, GstSeekType seek_type, |
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376 | guint64 offset); |
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377 | G_CONST_RETURN GstQueryType* |
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378 | gst_element_get_query_types (GstElement *element); |
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379 | gboolean gst_element_query (GstElement *element, GstQueryType type, |
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380 | GstFormat *format, gint64 *value); |
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381 | G_CONST_RETURN GstFormat* |
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382 | gst_element_get_formats (GstElement *element); |
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383 | gboolean gst_element_convert (GstElement *element, |
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384 | GstFormat src_format, gint64 src_value, |
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385 | GstFormat *dest_format, gint64 *dest_value); |
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386 | |
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387 | void gst_element_found_tags (GstElement *element, const GstTagList *tag_list); |
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388 | void gst_element_found_tags_for_pad (GstElement *element, GstPad *pad, GstClockTime timestamp, |
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389 | GstTagList *list); |
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390 | |
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391 | void gst_element_set_eos (GstElement *element); |
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392 | |
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393 | gchar * _gst_element_error_printf (const gchar *format, ...); |
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394 | void gst_element_error_full (GstElement *element, GQuark domain, gint code, |
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395 | gchar *message, gchar *debug, |
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396 | const gchar *file, const gchar *function, gint line); |
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397 | |
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398 | gboolean gst_element_is_locked_state (GstElement *element); |
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399 | void gst_element_set_locked_state (GstElement *element, gboolean locked_state); |
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400 | gboolean gst_element_sync_state_with_parent (GstElement *element); |
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401 | |
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402 | GstElementState gst_element_get_state (GstElement *element); |
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403 | GstElementStateReturn gst_element_set_state (GstElement *element, GstElementState state); |
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404 | |
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405 | void gst_element_wait_state_change (GstElement *element); |
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406 | |
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407 | G_CONST_RETURN gchar* gst_element_state_get_name (GstElementState state); |
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408 | |
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409 | GstElementFactory* gst_element_get_factory (GstElement *element); |
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410 | |
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411 | GstBin* gst_element_get_managing_bin (GstElement *element); |
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412 | |
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413 | |
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414 | /* |
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415 | * |
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416 | * factories stuff |
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417 | * |
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418 | **/ |
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419 | |
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420 | #define GST_TYPE_ELEMENT_FACTORY (gst_element_factory_get_type()) |
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421 | #define GST_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_ELEMENT_FACTORY,\ |
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422 | GstElementFactory)) |
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423 | #define GST_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_ELEMENT_FACTORY,\ |
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424 | GstElementFactoryClass)) |
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425 | #define GST_IS_ELEMENT_FACTORY(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_ELEMENT_FACTORY)) |
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426 | #define GST_IS_ELEMENT_FACTORY_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_ELEMENT_FACTORY)) |
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427 | |
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428 | struct _GstElementFactory { |
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429 | GstPluginFeature parent; |
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430 | |
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431 | GType type; /* unique GType of element or 0 if not loaded */ |
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432 | |
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433 | GstElementDetails details; |
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434 | |
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435 | GList * padtemplates; |
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436 | guint numpadtemplates; |
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437 | |
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438 | /* URI interface stuff */ |
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439 | guint uri_type; |
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440 | gchar ** uri_protocols; |
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441 | |
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442 | GList * interfaces; /* interfaces this element implements */ |
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443 | |
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444 | gpointer _gst_reserved[GST_PADDING]; |
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445 | }; |
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446 | |
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447 | struct _GstElementFactoryClass { |
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448 | GstPluginFeatureClass parent_class; |
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449 | |
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450 | gpointer _gst_reserved[GST_PADDING]; |
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451 | }; |
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452 | |
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453 | GType gst_element_factory_get_type (void); |
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454 | |
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455 | gboolean gst_element_register (GstPlugin *plugin, |
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456 | const gchar *name, |
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457 | guint rank, |
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458 | GType type); |
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459 | |
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460 | GstElementFactory * gst_element_factory_find (const gchar *name); |
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461 | GType gst_element_factory_get_element_type (GstElementFactory *factory); |
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462 | G_CONST_RETURN gchar * gst_element_factory_get_longname (GstElementFactory *factory); |
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463 | G_CONST_RETURN gchar * gst_element_factory_get_klass (GstElementFactory *factory); |
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464 | G_CONST_RETURN gchar * gst_element_factory_get_description (GstElementFactory *factory); |
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465 | G_CONST_RETURN gchar * gst_element_factory_get_author (GstElementFactory *factory); |
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466 | guint gst_element_factory_get_num_pad_templates (GstElementFactory *factory); |
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467 | G_CONST_RETURN GList * gst_element_factory_get_pad_templates (GstElementFactory *factory); |
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468 | guint gst_element_factory_get_uri_type (GstElementFactory *factory); |
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469 | gchar ** gst_element_factory_get_uri_protocols (GstElementFactory *factory); |
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470 | |
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471 | GstElement* gst_element_factory_create (GstElementFactory *factory, |
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472 | const gchar *name); |
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473 | GstElement* gst_element_factory_make (const gchar *factoryname, const gchar *name); |
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474 | |
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475 | gboolean gst_element_factory_can_src_caps (GstElementFactory *factory, |
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476 | const GstCaps *caps); |
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477 | gboolean gst_element_factory_can_sink_caps (GstElementFactory *factory, |
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478 | const GstCaps *caps); |
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479 | |
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480 | void __gst_element_factory_add_pad_template (GstElementFactory *elementfactory, |
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481 | GstPadTemplate *templ); |
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482 | void __gst_element_factory_add_interface (GstElementFactory *elementfactory, |
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483 | const gchar *interfacename); |
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484 | |
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485 | |
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486 | G_END_DECLS |
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487 | |
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488 | |
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489 | #endif /* __GST_ELEMENT_H__ */ |
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490 | |
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