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gstreamer/gst/gstevent.h
David Schleef ad3863ac5e docs/random/ds/0.9-suggested-changes: random notes 
Original commit message from CVS:
* docs/random/ds/0.9-suggested-changes: random notes
* gst/elements/gstfakesrc.c: (gst_fakesrc_get_formats),
(gst_fakesrc_get_query_types), (gst_fakesrc_get_event_mask):
Replace GST_PAD_EVENT_MASK_FUNCTION() (et al.) with its
expansion.
* gst/elements/gstfilesink.c: (gst_filesink_get_formats),
(gst_filesink_get_query_types): same
* gst/elements/gstfilesrc.c: (gst_filesrc_get_event_mask),
(gst_filesrc_get_query_types), (gst_filesrc_get_formats): same
* gst/gstcaps.h: deprecate GST_DEBUG_CAPS(), and fix the macro
to use new GST_PTR_FORMAT.
* gst/gstelement.h: deprecate function factory macros
GST_ELEMENT_QUERY_TYPE_FUNCTION(), GST_ELEMENT_EVENT_MASK_FUNCTION().
These are our last variadic macros that can't be replaced with
inlines.  Celebrate!  Also fix a typo in an #ifdef that was
attempting to deprecate gst_element_clock_wait().
* gst/gstevent.h: same
* gst/gstpad.c: (gst_pad_link_intersect), (gst_pad_link_fixate),
(gst_pad_try_set_caps): replace GST_DEBUG_CAPS() with GST_DEBUG()
* gst/gstpad.h: deprecate function factory macros similar to above.
2004-02-04 19:38:33 +00:00

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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/gsttypes.h>
#include <gst/gstdata.h>
#include <gst/gstformat.h>
#include <gst/gstobject.h>
#include <gst/gststructure.h>
G_BEGIN_DECLS
typedef enum {
GST_EVENT_UNKNOWN = 0,
GST_EVENT_EOS = 1,
GST_EVENT_FLUSH = 2,
GST_EVENT_EMPTY = 3,
GST_EVENT_DISCONTINUOUS = 4,
/*GST_EVENT_NEW_MEDIA = 5, <- removed */
GST_EVENT_QOS = 6,
GST_EVENT_SEEK = 7,
GST_EVENT_SEEK_SEGMENT = 8,
GST_EVENT_SEGMENT_DONE = 9,
GST_EVENT_SIZE = 10,
GST_EVENT_RATE = 11,
GST_EVENT_FILLER = 12,
GST_EVENT_TS_OFFSET = 13,
GST_EVENT_INTERRUPT = 14,
GST_EVENT_NAVIGATION = 15,
GST_EVENT_TAG = 16
} GstEventType;
extern GType _gst_event_type;
#define GST_EVENT_TRACE_NAME "GstEvent"
#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_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;
#ifndef GST_DISABLE_DEPRECATED
#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
#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 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_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)
#define GST_EVENT_RATE_VALUE(event) (GST_EVENT(event)->event_data.rate.value)
struct _GstEvent {
GstData data;
GstEventType type;
guint64 timestamp;
GstObject *src;
union {
struct {
GstSeekType type;
gint64 offset;
gint64 endoffset;
GstSeekAccuracy accuracy;
} seek;
struct {
GstFormatValue offsets[8];
gint noffsets;
gboolean new_media;
} discont;
struct {
GstFormat format;
gint64 value;
} size;
struct {
gdouble value;
} rate;
struct {
GstStructure *structure;
} structure;
} event_data;
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_data_ref (GST_DATA (ev)))
#define gst_event_ref_by_count(ev,c) GST_EVENT (gst_data_ref_by_count (GST_DATA (ev), c))
#define gst_event_unref(ev) gst_data_unref (GST_DATA (ev))
/* copy buffer */
#define gst_event_copy(ev) GST_EVENT (gst_data_copy (GST_DATA (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 (gboolean new_media,
GstFormat format1, ...);
GstEvent* gst_event_new_discontinuous_valist (gboolean new_media,
GstFormat format1,
va_list var_args);
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__ */
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