author | hgs |
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changeset 20 | 7e3786c5ed27 |
parent 16 | 8e837d1bf446 |
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permissions | -rw-r--r-- |
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/* GStreamer |
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> |
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* 2000 Wim Taymans <wtay@chello.be> |
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* |
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* gstinterface.h: Declarations of interface stuff |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Library General Public |
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* License as published by the Free Software Foundation; either |
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* version 2 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Library General Public License for more details. |
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* |
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* You should have received a copy of the GNU Library General Public |
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* License along with this library; if not, write to the |
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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* Boston, MA 02111-1307, USA. |
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*/ |
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#ifndef __GST_IMPLEMENTS_INTERFACE_H__ |
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#define __GST_IMPLEMENTS_INTERFACE_H__ |
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#include <gst/gstelement.h> |
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G_BEGIN_DECLS |
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#define GST_TYPE_IMPLEMENTS_INTERFACE \ |
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(gst_implements_interface_get_type ()) |
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#define GST_IMPLEMENTS_INTERFACE(obj) \ |
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_IMPLEMENTS_INTERFACE, \ |
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GstImplementsInterface)) |
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#define GST_IS_IMPLEMENTS_INTERFACE(obj) \ |
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_IMPLEMENTS_INTERFACE)) |
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#define GST_IMPLEMENTS_INTERFACE_GET_CLASS(inst) \ |
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(G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_IMPLEMENTS_INTERFACE, \ |
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GstImplementsInterfaceClass)) |
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/** |
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* GstImplementsInterface: |
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* |
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* Opaque #GstImplementsInterface structure. |
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*/ |
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typedef struct _GstImplementsInterface GstImplementsInterface; |
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typedef struct _GstImplementsInterfaceClass GstImplementsInterfaceClass; |
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/* This small extra virtual function is here to provide an |
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* interface functionality on a per-instance basis rather |
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* than a per-class basis, which is the case for glib. |
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*/ |
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struct _GstImplementsInterfaceClass { |
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GTypeInterface parent; |
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/* virtual functions */ |
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gboolean (* supported) (GstImplementsInterface *iface, |
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GType iface_type); |
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gpointer _gst_reserved[GST_PADDING]; |
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}; |
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#define GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_CAST(obj, type, cast_t) \ |
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((cast_t *) gst_implements_interface_cast ((obj), (type))) |
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#define GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_TYPE(obj, type) \ |
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(gst_implements_interface_check ((obj), (type))) |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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GType gst_implements_interface_get_type (void); |
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/* wrapper functions to check for functionality implementation */ |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_element_implements_interface (GstElement *element, |
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GType iface_type); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gpointer gst_implements_interface_cast (gpointer from, |
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GType type); |
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#ifdef __SYMBIAN32__ |
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IMPORT_C |
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#endif |
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gboolean gst_implements_interface_check (gpointer from, |
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GType type); |
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G_END_DECLS |
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#endif /* __GST_IMPLEMENTS_INTERFACE_H__ */ |