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75 lines
2.6 KiB
C
75 lines
2.6 KiB
C
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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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* 2005 Wim Taymans <wim@fluendo.com>
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*
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* gstpushsrc.h:
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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_PUSHSRC_H__
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#define __GST_PUSHSRC_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasesrc.h>
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G_BEGIN_DECLS
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#define GST_TYPE_PUSHSRC (gst_pushsrc_get_type())
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#define GST_PUSHSRC(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PUSHSRC,GstPushSrc))
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#define GST_PUSHSRC_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PUSHSRC,GstPushSrcClass))
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#define GST_PUSHSRC_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_PUSHSRC, GstPushSrcClass))
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#define GST_IS_PUSHSRC(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PUSHSRC))
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#define GST_IS_PUSHSRC_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PUSHSRC))
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/* base class for block based sources
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*
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* This class is mostly usefull for elements that cannot do
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* random access, or at least very slowly. The source usually
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* prefers to push out a fixed size buffer.
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*
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* Classes extending this base class will usually be scheduled
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* in a push based mode. It the peer accepts to operate without
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* offsets and withing the limits of the allowed block size, this
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* class can operate in getrange based mode automatically.
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*
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* The subclass should extend the methods from the baseclass in
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* addition to the create method.
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*
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* Seeking, flushing, scheduling and sync is all handled by this
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* base class.
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*/
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typedef struct _GstPushSrc GstPushSrc;
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typedef struct _GstPushSrcClass GstPushSrcClass;
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struct _GstPushSrc {
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GstBaseSrc parent;
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};
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struct _GstPushSrcClass {
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GstBaseSrcClass parent_class;
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/* ask the subclass to create a buffer */
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GstFlowReturn (*create) (GstPushSrc *src, GstBuffer **buf);
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};
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GType gst_pushsrc_get_type(void);
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G_END_DECLS
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#endif /* __GST_PUSHSRC_H__ */
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