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138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wim.taymans@chello.be>
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*
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* gstevent.h: Header for GstEvent subsystem
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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_EVENT_H__
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#define __GST_EVENT_H__
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#include <gst/gsttypes.h>
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#include <gst/gstdata.h>
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#include <gst/gstcaps.h>
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#include <gst/gstformat.h>
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G_BEGIN_DECLS
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typedef enum {
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GST_EVENT_UNKNOWN,
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GST_EVENT_EOS,
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GST_EVENT_FLUSH,
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GST_EVENT_EMPTY,
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GST_EVENT_DISCONTINUOUS,
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GST_EVENT_NEW_MEDIA,
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GST_EVENT_QOS,
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GST_EVENT_SEEK,
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GST_EVENT_FILLER,
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} GstEventType;
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extern GType _gst_event_type;
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#define GST_TYPE_EVENT (_gst_event_type)
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#define GST_EVENT(event) ((GstEvent*)(event))
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#define GST_IS_EVENT(event) (GST_DATA_TYPE(event) == GST_TYPE_EVENT)
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#define GST_EVENT_TYPE(event) (GST_EVENT(event)->type)
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#define GST_EVENT_TIMESTAMP(event) (GST_EVENT(event)->timestamp)
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#define GST_EVENT_SRC(event) (GST_EVENT(event)->src)
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#define GST_SEEK_FORMAT_SHIFT 0
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#define GST_SEEK_METHOD_SHIFT 16
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#define GST_SEEK_FLAGS_SHIFT 20
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#define GST_SEEK_FORMAT_MASK 0x0000ffff
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#define GST_SEEK_METHOD_MASK 0x000f0000
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#define GST_SEEK_FLAGS_MASK 0xfff00000
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/* seek events */
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typedef enum {
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GST_SEEK_METHOD_CUR = (1 << GST_SEEK_METHOD_SHIFT),
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GST_SEEK_METHOD_SET = (2 << GST_SEEK_METHOD_SHIFT),
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GST_SEEK_METHOD_END = (3 << GST_SEEK_METHOD_SHIFT),
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GST_SEEK_FLAG_FLUSH = (1 << (GST_SEEK_FLAGS_SHIFT + 0)),
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GST_SEEK_FLAG_ACCURATE = (1 << (GST_SEEK_FLAGS_SHIFT + 1)),
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GST_SEEK_FLAG_KEY_UNIT = (1 << (GST_SEEK_FLAGS_SHIFT + 2)),
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} GstSeekType;
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typedef enum {
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GST_SEEK_CERTAIN,
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GST_SEEK_FUZZY,
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} GstSeekAccuracy;
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typedef struct
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{
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GstFormat format;
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gint64 value;
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} GstFormatValue;
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#define GST_EVENT_SEEK_TYPE(event) (GST_EVENT(event)->event_data.seek.type)
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#define GST_EVENT_SEEK_FORMAT(event) (GST_EVENT_SEEK_TYPE(event) & GST_SEEK_FORMAT_MASK)
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#define GST_EVENT_SEEK_METHOD(event) (GST_EVENT_SEEK_TYPE(event) & GST_SEEK_METHOD_MASK)
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#define GST_EVENT_SEEK_FLAGS(event) (GST_EVENT_SEEK_TYPE(event) & GST_SEEK_FLAGS_MASK)
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#define GST_EVENT_SEEK_OFFSET(event) (GST_EVENT(event)->event_data.seek.offset)
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#define GST_EVENT_SEEK_ACCURACY(event) (GST_EVENT(event)->event_data.seek.accuracy)
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#define GST_EVENT_DISCONT_FLUSH(event) (GST_EVENT(event)->event_data.discont.flush)
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#define GST_EVENT_DISCONT_OFFSET(event,i) (GST_EVENT(event)->event_data.discont.offsets[i])
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#define GST_EVENT_DISCONT_OFFSET_LEN(event) (GST_EVENT(event)->event_data.discont.noffsets)
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struct _GstEvent {
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GstData data;
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GstEventType type;
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guint64 timestamp;
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GstObject *src;
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union {
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struct {
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GstSeekType type;
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gint64 offset;
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GstSeekAccuracy accuracy;
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} seek;
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struct {
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GstFormatValue offsets[8];
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gint noffsets;
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gboolean flush;
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} discont;
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} event_data;
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};
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void _gst_event_initialize (void);
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GstEvent* gst_event_new (GstEventType type);
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GstEvent* gst_event_copy (GstEvent *event);
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void gst_event_free (GstEvent *event);
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/* seek event */
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GstEvent* gst_event_new_seek (GstSeekType type, gint64 offset);
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/* discontinous event */
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GstEvent* gst_event_new_discontinuous (gboolean new_media,
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GstFormat format1, ...);
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gboolean gst_event_discont_get_value (GstEvent *event, GstFormat format, gint64 *value);
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#define gst_event_new_filler() gst_event_new(GST_EVENT_FILLER)
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/* flush events */
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#define gst_event_new_flush() gst_event_new(GST_EVENT_FLUSH)
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G_END_DECLS
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#endif /* __GST_EVENT_H__ */
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