gstreamer/gst/gstevent.h
Wim Taymans 9286f126e2 Added a size event to optimize buffer sizes make filesrc update its blocksize when it receives a size event
Original commit message from CVS:
Added a size event to optimize buffer sizes
make filesrc update its blocksize when it receives a size event
2002-06-13 22:27:40 +00:00

149 lines
4.5 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* gstevent.h: Header for GstEvent subsystem
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_EVENT_H__
#define __GST_EVENT_H__
#include <gst/gsttypes.h>
#include <gst/gstdata.h>
#include <gst/gstcaps.h>
#include <gst/gstformat.h>
G_BEGIN_DECLS
typedef enum {
GST_EVENT_UNKNOWN,
GST_EVENT_EOS,
GST_EVENT_FLUSH,
GST_EVENT_EMPTY,
GST_EVENT_DISCONTINUOUS,
GST_EVENT_NEW_MEDIA,
GST_EVENT_QOS,
GST_EVENT_SEEK,
GST_EVENT_FILLER,
GST_EVENT_SIZE,
} GstEventType;
extern GType _gst_event_type;
#define GST_TYPE_EVENT (_gst_event_type)
#define GST_EVENT(event) ((GstEvent*)(event))
#define GST_IS_EVENT(event) (GST_DATA_TYPE(event) == GST_TYPE_EVENT)
#define GST_EVENT_TYPE(event) (GST_EVENT(event)->type)
#define GST_EVENT_TIMESTAMP(event) (GST_EVENT(event)->timestamp)
#define GST_EVENT_SRC(event) (GST_EVENT(event)->src)
#define GST_SEEK_FORMAT_SHIFT 0
#define GST_SEEK_METHOD_SHIFT 16
#define GST_SEEK_FLAGS_SHIFT 20
#define GST_SEEK_FORMAT_MASK 0x0000ffff
#define GST_SEEK_METHOD_MASK 0x000f0000
#define GST_SEEK_FLAGS_MASK 0xfff00000
/* seek events */
typedef enum {
GST_SEEK_METHOD_CUR = (1 << GST_SEEK_METHOD_SHIFT),
GST_SEEK_METHOD_SET = (2 << GST_SEEK_METHOD_SHIFT),
GST_SEEK_METHOD_END = (3 << GST_SEEK_METHOD_SHIFT),
GST_SEEK_FLAG_FLUSH = (1 << (GST_SEEK_FLAGS_SHIFT + 0)),
GST_SEEK_FLAG_ACCURATE = (1 << (GST_SEEK_FLAGS_SHIFT + 1)),
GST_SEEK_FLAG_KEY_UNIT = (1 << (GST_SEEK_FLAGS_SHIFT + 2)),
} GstSeekType;
typedef enum {
GST_SEEK_CERTAIN,
GST_SEEK_FUZZY,
} GstSeekAccuracy;
typedef struct
{
GstFormat format;
gint64 value;
} GstFormatValue;
#define GST_EVENT_SEEK_TYPE(event) (GST_EVENT(event)->event_data.seek.type)
#define GST_EVENT_SEEK_FORMAT(event) (GST_EVENT_SEEK_TYPE(event) & GST_SEEK_FORMAT_MASK)
#define GST_EVENT_SEEK_METHOD(event) (GST_EVENT_SEEK_TYPE(event) & GST_SEEK_METHOD_MASK)
#define GST_EVENT_SEEK_FLAGS(event) (GST_EVENT_SEEK_TYPE(event) & GST_SEEK_FLAGS_MASK)
#define GST_EVENT_SEEK_OFFSET(event) (GST_EVENT(event)->event_data.seek.offset)
#define GST_EVENT_SEEK_ACCURACY(event) (GST_EVENT(event)->event_data.seek.accuracy)
#define GST_EVENT_DISCONT_NEW_MEDIA(event) (GST_EVENT(event)->event_data.discont.new_media)
#define GST_EVENT_DISCONT_OFFSET(event,i) (GST_EVENT(event)->event_data.discont.offsets[i])
#define GST_EVENT_DISCONT_OFFSET_LEN(event) (GST_EVENT(event)->event_data.discont.noffsets)
#define GST_EVENT_SIZE_FORMAT(event) (GST_EVENT(event)->event_data.size.format)
#define GST_EVENT_SIZE_VALUE(event) (GST_EVENT(event)->event_data.size.value)
struct _GstEvent {
GstData data;
GstEventType type;
guint64 timestamp;
GstObject *src;
union {
struct {
GstSeekType type;
gint64 offset;
GstSeekAccuracy accuracy;
} seek;
struct {
GstFormatValue offsets[8];
gint noffsets;
gboolean new_media;
} discont;
struct {
GstFormat format;
gint64 value;
} size;
} event_data;
};
void _gst_event_initialize (void);
GstEvent* gst_event_new (GstEventType type);
GstEvent* gst_event_copy (GstEvent *event);
void gst_event_free (GstEvent *event);
/* seek event */
GstEvent* gst_event_new_seek (GstSeekType type, gint64 offset);
/* size events */
GstEvent* gst_event_new_size (GstFormat format, gint64 value);
/* discontinous event */
GstEvent* gst_event_new_discontinuous (gboolean new_media,
GstFormat format1, ...);
gboolean gst_event_discont_get_value (GstEvent *event, GstFormat format, gint64 *value);
#define gst_event_new_filler() gst_event_new(GST_EVENT_FILLER)
/* flush events */
#define gst_event_new_flush() gst_event_new(GST_EVENT_FLUSH)
G_END_DECLS
#endif /* __GST_EVENT_H__ */