2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wim.taymans@chello.be>
5 * gstevent.h: Header for GstEvent subsystem
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
23 #include <string.h> /* memcpy */
25 #include "gst_private.h"
26 #include "gstdata_private.h"
29 #include "gstmemchunk.h"
34 #ifndef GST_DISABLE_TRACE
35 /* #define GST_WITH_ALLOC_TRACE */
37 static GstAllocTrace *_event_trace;
40 static GstMemChunk *chunk;
44 GType _gst_event_type;
47 _gst_event_initialize (void)
49 /* register the type */
50 _gst_event_type = g_boxed_type_register_static ("GstEvent",
51 (GBoxedCopyFunc) gst_data_ref,
52 (GBoxedFreeFunc) gst_data_unref);
54 #ifndef GST_DISABLE_TRACE
55 _event_trace = gst_alloc_trace_register (GST_EVENT_TRACE_NAME);
58 chunk = gst_mem_chunk_new ("GstEventChunk", sizeof (GstEvent),
59 sizeof (GstEvent) * 50, 0);
63 _gst_event_copy (GstEvent *event)
67 copy = gst_mem_chunk_alloc (chunk);
68 #ifndef GST_DISABLE_TRACE
69 gst_alloc_trace_new (_event_trace, copy);
72 memcpy (copy, event, sizeof (GstEvent));
74 /* FIXME copy/ref additional fields */
75 switch (GST_EVENT_TYPE (event)) {
77 copy->event_data.structure.structure = gst_structure_copy (event->event_data.structure.structure);
86 _gst_event_free (GstEvent* event)
88 GST_CAT_INFO (GST_CAT_EVENT, "freeing event %p", event);
90 if (GST_EVENT_SRC (event)) {
91 gst_object_unref (GST_EVENT_SRC (event));
93 switch (GST_EVENT_TYPE (event)) {
95 gst_tag_list_free (event->event_data.structure.structure);
96 case GST_EVENT_NAVIGATION:
97 gst_structure_free (event->event_data.structure.structure);
101 _GST_DATA_DISPOSE (GST_DATA (event));
102 #ifndef GST_DISABLE_TRACE
103 gst_alloc_trace_free (_event_trace, event);
105 gst_mem_chunk_free (chunk, event);
109 * gst_event_masks_contains:
110 * @masks: The eventmask array to search
111 * @mask: the event mask to find
113 * See if the given eventmask is inside the eventmask array.
115 * Returns: TRUE if the eventmask is found inside the array
118 gst_event_masks_contains (const GstEventMask *masks, GstEventMask *mask)
120 g_return_val_if_fail (mask != NULL, FALSE);
125 while (masks->type) {
126 if (masks->type == mask->type &&
127 (masks->flags & mask->flags) == mask->flags)
137 gst_event_get_type (void)
139 return _gst_event_type;
144 * @type: The type of the new event
146 * Allocate a new event of the given type.
148 * Returns: A new event.
151 gst_event_new (GstEventType type)
155 event = gst_mem_chunk_alloc0 (chunk);
156 #ifndef GST_DISABLE_TRACE
157 gst_alloc_trace_new (_event_trace, event);
160 GST_CAT_INFO (GST_CAT_EVENT, "creating new event %p %d", event, type);
162 _GST_DATA_INIT (GST_DATA (event),
165 (GstDataFreeFunction) _gst_event_free,
166 (GstDataCopyFunction) _gst_event_copy);
168 GST_EVENT_TYPE (event) = type;
169 GST_EVENT_TIMESTAMP (event) = G_GINT64_CONSTANT (0);
170 GST_EVENT_SRC (event) = NULL;
176 * gst_event_new_seek:
177 * @type: The type of the seek event
178 * @offset: The offset of the seek
180 * Allocate a new seek event with the given parameters.
182 * Returns: A new seek event.
185 gst_event_new_seek (GstSeekType type, gint64 offset)
189 event = gst_event_new (GST_EVENT_SEEK);
191 GST_EVENT_SEEK_TYPE (event) = type;
192 GST_EVENT_SEEK_OFFSET (event) = offset;
193 GST_EVENT_SEEK_ENDOFFSET (event) = -1;
199 * gst_event_new_discontinuous_valist:
200 * @new_media: A flag indicating a new media type starts
201 * @format1: The format of the discont value
202 * @var_args: more discont values and formats
204 * Allocate a new discontinuous event with the given format/value pairs. Note
205 * that the values are of type gint64 - you may not use simple integers such
206 * as "0" when calling this function, always cast them like "(gint64) 0".
207 * Terminate the list with #GST_FORMAT_UNDEFINED.
209 * Returns: A new discontinuous event.
212 gst_event_new_discontinuous_valist (gboolean new_media, GstFormat format1, va_list var_args)
217 event = gst_event_new (GST_EVENT_DISCONTINUOUS);
218 GST_EVENT_DISCONT_NEW_MEDIA (event) = new_media;
220 while (format1 != GST_FORMAT_UNDEFINED && count < 8) {
222 GST_EVENT_DISCONT_OFFSET (event, count).format = format1 & GST_SEEK_FORMAT_MASK;
223 GST_EVENT_DISCONT_OFFSET (event, count).value = va_arg (var_args, gint64);
225 format1 = va_arg (var_args, GstFormat);
230 GST_EVENT_DISCONT_OFFSET_LEN (event) = count;
236 * gst_event_new_discontinuous:
237 * @new_media: A flag indicating a new media type starts
238 * @format1: The format of the discont value
239 * @...: more discont values and formats
241 * Allocate a new discontinuous event with the given format/value pairs. Note
242 * that the values are of type gint64 - you may not use simple integers such
243 * as "0" when calling this function, always cast them like "(gint64) 0".
244 * Terminate the list with #GST_FORMAT_UNDEFINED.
246 * Returns: A new discontinuous event.
249 gst_event_new_discontinuous (gboolean new_media, GstFormat format1, ...)
254 va_start (var_args, format1);
256 event = gst_event_new_discontinuous_valist (new_media, format1, var_args);
264 * gst_event_discont_get_value:
265 * @event: The event to query
266 * @format: The format of the discont value
267 * @value: A pointer to the value
269 * Get the value for the given format in the dicont event.
271 * Returns: TRUE if the discont event caries the specified format/value pair.
274 gst_event_discont_get_value (GstEvent *event, GstFormat format, gint64 *value)
278 g_return_val_if_fail (event != NULL, FALSE);
279 g_return_val_if_fail (value != NULL, FALSE);
281 n = GST_EVENT_DISCONT_OFFSET_LEN (event);
283 for (i = 0; i < n; i++) {
284 if (GST_EVENT_DISCONT_OFFSET(event,i).format == format) {
285 *value = GST_EVENT_DISCONT_OFFSET(event,i).value;
295 * gst_event_new_size:
296 * @format: The format of the size value
297 * @value: The value of the size event
299 * Create a new size event with the given values.
301 * Returns: The new size event.
304 gst_event_new_size (GstFormat format, gint64 value)
308 event = gst_event_new (GST_EVENT_SIZE);
310 GST_EVENT_SIZE_FORMAT (event) = format;
311 GST_EVENT_SIZE_VALUE (event) = value;
318 * gst_event_new_segment_seek:
319 * @type: The type of the seek event
320 * @start: The start offset of the seek
321 * @stop: The stop offset of the seek
323 * Allocate a new segment seek event with the given parameters.
325 * Returns: A new segment seek event.
328 gst_event_new_segment_seek (GstSeekType type, gint64 start, gint64 stop)
332 g_return_val_if_fail (start < stop, NULL);
334 event = gst_event_new (GST_EVENT_SEEK_SEGMENT);
336 GST_EVENT_SEEK_TYPE (event) = type;
337 GST_EVENT_SEEK_OFFSET (event) = start;
338 GST_EVENT_SEEK_ENDOFFSET (event) = stop;