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/* 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/gstminiobject.h>
#include <gst/gstformat.h>
#include <gst/gstobject.h>
#include <gst/gststructure.h>
G_BEGIN_DECLS
/**
* GstEventType:
* @GST_EVENT_UNKNOWN:
* @GST_EVENT_EOS:
* @GST_EVENT_FLUSH:
* @GST_EVENT_DISCONTINUOUS:
* @GST_EVENT_QOS:
* @GST_EVENT_SEEK:
* @GST_EVENT_SIZE:
* @GST_EVENT_RATE:
* @GST_EVENT_NAVIGATION:
* @GST_EVENT_TAG:
*/
typedef enum {
GST_EVENT_UNKNOWN = 0,
GST_EVENT_EOS = 1,
GST_EVENT_FLUSH = 2,
GST_EVENT_DISCONTINUOUS = 3,
GST_EVENT_QOS = 4,
GST_EVENT_SEEK = 5,
GST_EVENT_SIZE = 8,
GST_EVENT_RATE = 9,
GST_EVENT_NAVIGATION = 10,
GST_EVENT_TAG = 11
} GstEventType;
#define GST_EVENT_ANY GST_EVENT_NAVIGATION
#define GST_EVENT_TRACE_NAME "GstEvent"
typedef struct _GstEvent GstEvent;
typedef struct _GstEventClass GstEventClass;
#define GST_TYPE_EVENT (gst_event_get_type())
#define GST_IS_EVENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_EVENT))
#define GST_IS_EVENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_EVENT))
#define GST_EVENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_EVENT, GstEventClass))
#define GST_EVENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_EVENT, GstEvent))
#define GST_EVENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_EVENT, GstEventClass))
#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_EVENT_IS_INTERRUPT(event) (GST_EVENT_TYPE (event) == GST_EVENT_INTERRUPT)
#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
typedef enum {
GST_EVENT_FLAG_NONE = 0,
/* indicates negative rates are supported */
GST_RATE_FLAG_NEGATIVE = (1 << 1)
} GstEventFlag;
typedef struct
{
GstEventType type;
GstEventFlag flags;
} GstEventMask;
#ifdef G_HAVE_ISO_VARARGS
#define GST_EVENT_MASK_FUNCTION(type,functionname, ...) \
static const GstEventMask* \
functionname (type pad) \
{ \
static const GstEventMask masks[] = { \
__VA_ARGS__, \
{ 0, } \
}; \
return masks; \
}
#elif defined(G_HAVE_GNUC_VARARGS)
#define GST_EVENT_MASK_FUNCTION(type,functionname, a...) \
static const GstEventMask* \
functionname (type pad) \
{ \
static const GstEventMask masks[] = { \
a, \
{ 0, } \
}; \
return masks; \
}
#endif
/* seek events, extends GstEventFlag */
typedef enum {
/* | with some format */
/* | with one of these */
GST_SEEK_METHOD_CUR = (1 << (GST_SEEK_METHOD_SHIFT + 0)),
GST_SEEK_METHOD_SET = (1 << (GST_SEEK_METHOD_SHIFT + 1)),
GST_SEEK_METHOD_END = (1 << (GST_SEEK_METHOD_SHIFT + 2)),
/* | with optional seek flags */
/* seek flags */
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)),
GST_SEEK_FLAG_SEGMENT_LOOP = (1 << (GST_SEEK_FLAGS_SHIFT + 3))
} GstSeekType;
typedef enum {
GST_SEEK_CERTAIN,
GST_SEEK_FUZZY
} GstSeekAccuracy;
typedef struct
{
GstFormat format;
gint64 start_value;
gint64 end_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_ENDOFFSET(event) (GST_EVENT(event)->event_data.seek.endoffset)
#define GST_EVENT_SEEK_ACCURACY(event) (GST_EVENT(event)->event_data.seek.accuracy)
#define GST_EVENT_DISCONT_RATE(event) (GST_EVENT(event)->event_data.discont.rate)
#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_FLUSH_DONE(event) (GST_EVENT(event)->event_data.flush.done)
#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)
#define GST_EVENT_RATE_VALUE(event) (GST_EVENT(event)->event_data.rate.value)
struct _GstEvent {
GstMiniObject mini_object;
/*< public >*/ /* with COW */
GstEventType type;
guint64 timestamp;
GstObject *src;
union {
struct {
GstSeekType type;
gint64 offset;
gint64 endoffset;
GstSeekAccuracy accuracy;
} seek;
struct {
GstFormatValue offsets[8];
gint noffsets;
gdouble rate;
} discont;
struct {
gboolean done;
} flush;
struct {
GstFormat format;
gint64 value;
} size;
struct {
gdouble value;
} rate;
struct {
GstStructure *structure;
} structure;
} event_data;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
struct _GstEventClass {
GstMiniObjectClass mini_object_class;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
void _gst_event_initialize (void);
GType gst_event_get_type (void);
GstEvent* gst_event_new (GstEventType type);
/* refcounting */
#define gst_event_ref(ev) GST_EVENT (gst_mini_object_ref (GST_MINI_OBJECT (ev)))
#define gst_event_unref(ev) gst_mini_object_unref (GST_MINI_OBJECT (ev))
/* copy buffer */
#define gst_event_copy(ev) GST_EVENT (gst_mini_object_copy (GST_MINI_OBJECT (ev)))
gboolean gst_event_masks_contains (const GstEventMask *masks, GstEventMask *mask);
/* seek event */
GstEvent* gst_event_new_seek (GstSeekType type, gint64 offset);
GstEvent* gst_event_new_segment_seek (GstSeekType type, gint64 start, gint64 stop);
/* size events */
GstEvent* gst_event_new_size (GstFormat format, gint64 value);
/* discontinous event */
GstEvent* gst_event_new_discontinuous (gdouble rate,
GstFormat format1, ...);
GstEvent* gst_event_new_discontinuous_valist (gdouble rate,
GstFormat format1,
va_list var_args);
gboolean gst_event_discont_get_value (GstEvent *event, GstFormat format,
gint64 *start_value, gint64 *end_value);
#define gst_event_new_filler() gst_event_new(GST_EVENT_FILLER)
#define gst_event_new_eos() gst_event_new(GST_EVENT_EOS)
/* flush events */
GstEvent* gst_event_new_flush (gboolean done);
G_END_DECLS
#endif /* __GST_EVENT_H__ */
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