2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wim.taymans@chello.be>
5 * gstpad.h: Header for GstPad object
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
27 #include <parser.h> // NOTE: This is xml-config's fault
29 // Include compatability defines: if libxml hasn't already defined these,
30 // we have an old version 1.x
31 #ifndef xmlChildrenNode
32 #define xmlChildrenNode childs
33 #define xmlRootNode root
36 #include <gst/gstobject.h>
37 #include <gst/gstbuffer.h>
38 #include <gst/cothreads.h>
39 #include <gst/gstcaps.h>
44 #endif /* __cplusplus */
47 #define GST_TYPE_PAD (gst_pad_get_type ())
48 #define GST_PAD(obj) (GTK_CHECK_CAST ((obj), GST_TYPE_PAD,GstPad))
49 #define GST_PAD_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD,GstPadClass))
50 #define GST_IS_PAD(obj) (GTK_CHECK_TYPE ((obj), GST_TYPE_PAD))
51 #define GST_IS_PAD_CLASS(obj) (GTK_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD))
53 #define GST_TYPE_REAL_PAD (gst_real_pad_get_type ())
54 #define GST_REAL_PAD(obj) (GTK_CHECK_CAST ((obj), GST_TYPE_REAL_PAD,GstRealPad))
55 #define GST_REAL_PAD_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GST_TYPE_REAL_PAD,GstRealPadClass))
56 #define GST_IS_REAL_PAD(obj) (GTK_CHECK_TYPE ((obj), GST_TYPE_REAL_PAD))
57 #define GST_IS_REAL_PAD_CLASS(obj) (GTK_CHECK_CLASS_TYPE ((klass), GST_TYPE_REAL_PAD))
59 #define GST_TYPE_GHOST_PAD (gst_ghost_pad_get_type ())
60 #define GST_GHOST_PAD(obj) (GTK_CHECK_CAST ((obj), GST_TYPE_GHOST_PAD,GstGhostPad))
61 #define GST_GHOST_PAD_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GST_TYPE_GHOST_PAD,GstGhostPadClass))
62 #define GST_IS_GHOST_PAD(obj) (GTK_CHECK_TYPE ((obj), GST_TYPE_GHOST_PAD))
63 #define GST_IS_GHOST_PAD_CLASS(obj) (GTK_CHECK_CLASS_TYPE ((klass), GST_TYPE_GHOST_PAD))
66 typedef struct _GstPad GstPad;
67 typedef struct _GstPadClass GstPadClass;
68 typedef struct _GstRealPad GstRealPad;
69 typedef struct _GstRealPadClass GstRealPadClass;
70 typedef struct _GstGhostPad GstGhostPad;
71 typedef struct _GstGhostPadClass GstGhostPadClass;
72 typedef struct _GstPadTemplate GstPadTemplate;
73 typedef struct _GstPadTemplateClass GstPadTemplateClass;
78 GST_REGION_OFFSET_LEN,
83 /* this defines the functions used to chain buffers
84 * pad is the sink pad (so the same chain function can be used for N pads)
85 * buf is the buffer being passed */
86 typedef void (*GstPadChainFunction) (GstPad *pad,GstBuffer *buf);
87 typedef GstBuffer *(*GstPadGetFunction) (GstPad *pad);
88 typedef GstBuffer *(*GstPadGetRegionFunction) (GstPad *pad, GstRegionType type, guint64 offset, guint64 len);
89 typedef void (*GstPadQoSFunction) (GstPad *pad, glong qos_message);
91 typedef void (*GstPadPushFunction) (GstPad *pad, GstBuffer *buf);
92 typedef GstBuffer *(*GstPadPullFunction) (GstPad *pad);
93 typedef GstBuffer *(*GstPadPullRegionFunction) (GstPad *pad, GstRegionType type, guint64 offset, guint64 len);
94 typedef gboolean (*GstPadEOSFunction) (GstPad *pad);
103 GST_PAD_DISABLED = GST_OBJECT_FLAG_LAST,
106 GST_PAD_FLAG_LAST = GST_OBJECT_FLAG_LAST + 4,
112 gpointer element_private;
114 GstPadTemplate *padtemplate; /* the template for this pad */
117 struct _GstPadClass {
118 GstObjectClass parent_class;
125 GstPadDirection direction;
127 cothread_state *threadstate;
132 GstRegionType regiontype;
136 GstPadChainFunction chainfunc;
137 GstPadGetFunction getfunc;
138 GstPadGetRegionFunction getregionfunc;
139 GstPadQoSFunction qosfunc;
140 GstPadEOSFunction eosfunc;
142 GstPadPushFunction pushfunc;
143 GstPadPullFunction pullfunc;
144 GstPadPullRegionFunction pullregionfunc;
149 struct _GstRealPadClass {
150 GstPadClass parent_class;
152 /* signal callbacks */
153 void (*set_active) (GstPad *pad, gboolean active);
154 void (*caps_changed) (GstPad *pad, GstCaps *newcaps);
155 void (*eos) (GstPad *pad);
158 struct _GstGhostPad {
164 struct _GstGhostPadClass {
165 GstPadClass parent_class;
169 /***** helper macros *****/
171 #define GST_PAD_NAME(pad) (GST_OBJECT_NAME(pad))
172 #define GST_PAD_PARENT(pad) (GST_OBJECT_PARENT(pad))
173 #define GST_PAD_ELEMENT_PRIVATE(pad) (((GstPad *)(pad))->element_private)
174 #define GST_PAD_PADTEMPLATE(pad) (((GstPad *)(pad))->padtemplate)
177 #define GST_RPAD_DIRECTION(pad) (((GstRealPad *)(pad))->direction)
178 #define GST_RPAD_CAPS(pad) (((GstRealPad *)(pad))->caps)
179 #define GST_RPAD_PEER(pad) (((GstRealPad *)(pad))->peer)
180 #define GST_RPAD_BUFPEN(pad) (((GstRealPad *)(pad))->bufpen)
181 #define GST_RPAD_CHAINFUNC(pad) (((GstRealPad *)(pad))->chainfunc)
182 #define GST_RPAD_GETFUNC(pad) (((GstRealPad *)(pad))->getfunc)
183 #define GST_RPAD_GETREGIONFUNC(pad) (((GstRealPad *)(pad))->getregionfunc)
184 #define GST_RPAD_PUSHFUNC(pad) (((GstRealPad *)(pad))->pushfunc)
185 #define GST_RPAD_PULLFUNC(pad) (((GstRealPad *)(pad))->pullfunc)
186 #define GST_RPAD_PULLREGIONFUNC(pad) (((GstRealPad *)(pad))->pullregionfunc)
187 #define GST_RPAD_QOSFUNC(pad) (((GstRealPad *)(pad))->qosfunc)
188 #define GST_RPAD_EOSFUNC(pad) (((GstRealPad *)(pad))->eosfunc)
190 #define GST_RPAD_REGIONTYPE(pad) (((GstRealPad *)(pad))->regiontype)
191 #define GST_RPAD_OFFSET(pad) (((GstRealPad *)(pad))->offset)
192 #define GST_RPAD_LEN(pad) (((GstRealPad *)(pad))->len)
195 #define GST_GPAD_REALPAD(pad) (((GstGhostPad *)(pad))->realpad)
198 #define GST_PAD_REALIZE(pad) (GST_IS_REAL_PAD(pad) ? ((GstRealPad *)(pad)) : GST_GPAD_REALPAD(pad))
199 #define GST_PAD_DIRECTION(pad) GST_RPAD_DIRECTION(GST_PAD_REALIZE(pad))
200 #define GST_PAD_CAPS(pad) GST_RPAD_CAPS(GST_PAD_REALIZE(pad))
201 #define GST_PAD_PEER(pad) GST_RPAD_PEER(GST_PAD_REALIZE(pad))
203 /* Some check functions (unused?) */
204 #define GST_PAD_CONNECTED(pad) (GST_IS_REAL_PAD(pad) && GST_REAL_PAD(pad)->peer != NULL)
205 #define GST_PAD_CAN_PULL(pad) (GST_IS_REAL_PAD(pad) && GST_REAL_PAD(pad)->pullfunc != NULL)
208 /***** PadTemplate *****/
209 #define GST_TYPE_PADTEMPLATE (gst_padtemplate_get_type ())
210 #define GST_PADTEMPLATE(obj) (GTK_CHECK_CAST ((obj), GST_TYPE_PADTEMPLATE,GstPad))
211 #define GST_PADTEMPLATE_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GST_TYPE_PADTEMPLATE,GstPadClass))
212 #define GST_IS_PADTEMPLATE(obj) (GTK_CHECK_TYPE ((obj), GST_TYPE_PADTEMPLATE))
213 #define GST_IS_PADTEMPLATE_CLASS(obj) (GTK_CHECK_CLASS_TYPE ((klass), GST_TYPE_PADTEMPLATE))
221 struct _GstPadTemplate {
224 gchar *name_template;
225 GstPadDirection direction;
226 GstPadPresence presence;
230 struct _GstPadTemplateClass {
231 GstObjectClass parent_class;
233 /* signal callbacks */
234 void (*pad_created) (GstPadTemplate *templ, GstPad *pad);
239 typedef gpointer GstPadFactoryEntry;
240 typedef GstPadFactoryEntry GstPadFactory[];
242 #define GST_PAD_FACTORY_ALWAYS GINT_TO_POINTER(GST_PAD_ALWAYS)
243 #define GST_PAD_FACTORY_SOMETIMES GINT_TO_POINTER(GST_PAD_SOMETIMES)
244 #define GST_PAD_FACTORY_REQUEST GINT_TO_POINTER(GST_PAD_REQUEST)
246 #define GST_PAD_FACTORY_SRC GINT_TO_POINTER(GST_PAD_SRC)
247 #define GST_PAD_FACTORY_SINK GINT_TO_POINTER(GST_PAD_SINK)
249 #define GST_PAD_FACTORY_CAPS(a...) GINT_TO_POINTER(1),##a,NULL
252 GtkType gst_pad_get_type (void);
253 GtkType gst_real_pad_get_type (void);
254 GtkType gst_ghost_pad_get_type (void);
256 GstPad* gst_pad_new (gchar *name, GstPadDirection direction);
257 #define gst_pad_destroy(pad) gst_object_destroy (GST_OBJECT (pad))
258 GstPad* gst_pad_new_from_template (GstPadTemplate *templ, gchar *name);
260 GstPadDirection gst_pad_get_direction (GstPad *pad);
262 void gst_pad_set_chain_function (GstPad *pad, GstPadChainFunction chain);
263 void gst_pad_set_get_function (GstPad *pad, GstPadGetFunction get);
264 void gst_pad_set_getregion_function (GstPad *pad, GstPadGetRegionFunction getregion);
265 void gst_pad_set_qos_function (GstPad *pad, GstPadQoSFunction qos);
266 void gst_pad_set_eos_function (GstPad *pad, GstPadEOSFunction eos);
268 void gst_pad_set_caps_list (GstPad *pad, GList *caps);
269 GList* gst_pad_get_caps_list (GstPad *pad);
270 GstCaps* gst_pad_get_caps_by_name (GstPad *pad, gchar *name);
271 gboolean gst_pad_check_compatibility (GstPad *srcpad, GstPad *sinkpad);
273 void gst_pad_set_element_private (GstPad *pad, gpointer priv);
274 gpointer gst_pad_get_element_private (GstPad *pad);
276 void gst_pad_set_name (GstPad *pad, const gchar *name);
277 const gchar* gst_pad_get_name (GstPad *pad);
279 void gst_pad_set_parent (GstPad *pad, GstObject *parent);
280 GstObject* gst_pad_get_parent (GstPad *pad);
282 void gst_pad_add_ghost_pad (GstPad *pad, GstPad *ghostpad);
283 void gst_pad_remove_ghost_pad (GstPad *pad, GstPad *ghostpad);
284 GList* gst_pad_get_ghost_pad_list (GstPad *pad);
286 GstPad* gst_pad_get_peer (GstPad *pad);
288 void gst_pad_connect (GstPad *srcpad, GstPad *sinkpad);
289 void gst_pad_disconnect (GstPad *srcpad, GstPad *sinkpad);
292 void gst_pad_push (GstPad *pad, GstBuffer *buf);
294 #define gst_pad_push(pad,buf) G_STMT_START{ \
295 if ((pad)->peer->pushfunc) ((pad)->peer->pushfunc)((pad)->peer,(buf)); \
299 GstBuffer* gst_pad_pull (GstPad *pad);
300 GstBuffer* gst_pad_pullregion (GstPad *pad, GstRegionType type, guint64 offset, guint64 len);
302 #define gst_pad_pull(pad) \
303 (((pad)->peer->pullfunc) ? ((pad)->peer->pullfunc)((pad)->peer) : NULL)
304 #define gst_pad_pullregion(pad,type,offset,len) \
305 (((pad)->peer->pullregionfunc) ? ((pad)->peer->pullregionfunc)((pad)->peer,(type),(offset),(len)) : NULL)
308 #define gst_pad_eos(pad) (GST_RPAD_EOSFUNC(GST_RPAD_PEER(pad))(GST_PAD(GST_RPAD_PEER(pad))))
309 gboolean gst_pad_set_eos (GstPad *pad);
311 void gst_pad_handle_qos (GstPad *pad, glong qos_message);
313 void gst_pad_load_and_connect (xmlNodePtr self, GstObject *parent);
317 GstPad * gst_ghost_pad_new (gchar *name,GstPad *pad);
321 /* templates and factories */
322 GtkType gst_padtemplate_get_type (void);
324 GstPadTemplate* gst_padtemplate_new (GstPadFactory *factory);
325 GstPadTemplate* gst_padtemplate_create (gchar *name_template,
326 GstPadDirection direction, GstPadPresence presence,
329 xmlNodePtr gst_padtemplate_save_thyself (GstPadTemplate *templ, xmlNodePtr parent);
330 GstPadTemplate* gst_padtemplate_load_thyself (xmlNodePtr parent);
334 #endif /* __cplusplus */
337 #endif /* __GST_PAD_H__ */