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c11c932f88
Original commit message from CVS: * docs/design/part-element-sink.txt: * docs/design/part-element-source.txt: * gst/base/gstbasesink.c: (gst_basesink_class_init), (gst_basesink_event), (gst_basesink_activate): * gst/base/gstbasesink.h: * gst/base/gstbasesrc.c: (gst_basesrc_init), (gst_basesrc_unlock), (gst_basesrc_activate): * gst/base/gstbasesrc.h: * gst/gstelement.c: (gst_element_pads_activate): Some more documentation. Fixed scheduling decision in _pads_activate().
101 lines
3.3 KiB
C
101 lines
3.3 KiB
C
/* 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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* gstbasesink.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_BASESINK_H__
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#define __GST_BASESINK_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_BASESINK (gst_basesink_get_type())
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#define GST_BASESINK(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_BASESINK,GstBaseSink))
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#define GST_BASESINK_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_BASESINK,GstBaseSinkClass))
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#define GST_BASESINK_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BASESINK, GstBaseSinkClass))
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#define GST_IS_BASESINK(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_BASESINK))
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#define GST_IS_BASESINK_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_BASESINK))
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#define GST_BASESINK_CLOCK(obj) (GST_BASESINK (obj)->clock)
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#define GST_BASESINK_PAD(obj) (GST_BASESINK (obj)->sinkpad)
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typedef struct _GstBaseSink GstBaseSink;
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typedef struct _GstBaseSinkClass GstBaseSinkClass;
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/* a base class for implementing chain based sinks
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*
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* Preroll, EOS, state changes are all handled.
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*/
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struct _GstBaseSink {
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GstElement element;
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GstPad *sinkpad;
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GstActivateMode pad_mode;
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/*< protected >*/ /* with PREROLL_LOCK */
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GQueue *preroll_queue;
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gint preroll_queue_max_len;
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guint64 offset;
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gboolean has_loop;
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gboolean has_chain;
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GstClock *clock;
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GstClockID clock_id;
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GstClockTime end_time;
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gboolean eos;
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gboolean need_preroll;
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gboolean have_preroll;
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};
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struct _GstBaseSinkClass {
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GstElementClass parent_class;
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/* get caps from subclass */
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GstCaps* (*get_caps) (GstBaseSink *sink);
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/* notify subclass of new caps */
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gboolean (*set_caps) (GstBaseSink *sink, GstCaps *caps);
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/* allocate a new buffer with given caps */
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GstBuffer* (*buffer_alloc) (GstBaseSink *sink, guint64 offset, guint size,
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GstCaps *caps);
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/* get the start and end times for syncing on this buffer */
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void (*get_times) (GstBaseSink *sink, GstBuffer *buffer,
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GstClockTime *start, GstClockTime *end);
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/* unlock any pending access to the resource. subclasses should unlock
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* any function ASAP. */
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gboolean (*unlock) (GstBaseSink *sink);
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/* notify subclass of event, preroll buffer or real buffer */
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gboolean (*event) (GstBaseSink *sink, GstEvent *event);
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GstFlowReturn (*preroll) (GstBaseSink *sink, GstBuffer *buffer);
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GstFlowReturn (*render) (GstBaseSink *sink, GstBuffer *buffer);
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};
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GType gst_basesink_get_type(void);
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G_END_DECLS
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#endif /* __GST_BASESINK_H__ */
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