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213 lines
6.5 KiB
C
213 lines
6.5 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/gstformat.h>
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#include <gst/gstobject.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_SEEK_SEGMENT,
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GST_EVENT_SEGMENT_DONE,
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GST_EVENT_SIZE,
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GST_EVENT_RATE,
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GST_EVENT_FILLER,
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GST_EVENT_TS_OFFSET
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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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typedef enum {
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GST_EVENT_FLAG_NONE = 0,
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/* indicates negative rates are supported */
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GST_RATE_FLAG_NEGATIVE = (1 << 1)
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} GstEventFlag;
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typedef struct
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{
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GstEventType type;
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GstEventFlag flags;
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} GstEventMask;
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#ifdef G_HAVE_ISO_VARARGS
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#define GST_EVENT_MASK_FUNCTION(functionname, ...) \
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static const GstEventMask* \
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functionname (GstPad *pad) \
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{ \
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static const GstEventMask masks[] = { \
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__VA_ARGS__, \
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{ 0, } \
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}; \
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return masks; \
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}
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#elif defined(G_HAVE_GNUC_VARARGS)
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#define GST_EVENT_MASK_FUNCTION(functionname, a...) \
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static const GstEventMask* \
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functionname (GstPad *pad) \
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{ \
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static const GstEventMask masks[] = { \
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a, \
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{ 0, } \
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}; \
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return masks; \
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}
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#endif
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/* seek events, extends GstEventFlag */
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typedef enum {
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/* | with some format */
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/* | with one of these */
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GST_SEEK_METHOD_CUR = (1 << (GST_SEEK_METHOD_SHIFT + 0)),
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GST_SEEK_METHOD_SET = (1 << (GST_SEEK_METHOD_SHIFT + 1)),
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GST_SEEK_METHOD_END = (1 << (GST_SEEK_METHOD_SHIFT + 2)),
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/* | with optional seek flags */
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/* seek flags */
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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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GST_SEEK_FLAG_SEGMENT_LOOP = (1 << (GST_SEEK_FLAGS_SHIFT + 3))
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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_ENDOFFSET(event) (GST_EVENT(event)->event_data.seek.endoffset)
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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_NEW_MEDIA(event) (GST_EVENT(event)->event_data.discont.new_media)
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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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#define GST_EVENT_SIZE_FORMAT(event) (GST_EVENT(event)->event_data.size.format)
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#define GST_EVENT_SIZE_VALUE(event) (GST_EVENT(event)->event_data.size.value)
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#define GST_EVENT_RATE_VALUE(event) (GST_EVENT(event)->event_data.rate.value)
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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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gint64 endoffset;
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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 new_media;
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} discont;
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struct {
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GstFormat format;
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gint64 value;
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} size;
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struct {
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gdouble value;
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} rate;
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} event_data;
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};
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void _gst_event_initialize (void);
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void gst_event_print_stats (void);
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GstEvent* gst_event_new (GstEventType type);
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/* refcounting */
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#define gst_event_ref(ev) gst_data_ref (GST_DATA (ev))
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#define gst_event_ref_by_count(ev,c) gst_data_ref_by_count (GST_DATA (ev), c)
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#define gst_event_unref(ev) gst_data_unref (GST_DATA (ev))
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/* copy buffer */
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#define gst_event_copy(ev) GST_EVENT (gst_data_copy (GST_DATA (ev)))
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/* seek event */
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GstEvent* gst_event_new_seek (GstSeekType type, gint64 offset);
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GstEvent* gst_event_new_segment_seek (GstSeekType type, gint64 start, gint64 stop);
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/* size events */
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GstEvent* gst_event_new_size (GstFormat format, gint64 value);
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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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