1/* GStreamer
2 * Copyright (C) 1999,2000 Erik Walthinsen <[email protected]>
3 * 2000 Wim Taymans <[email protected]>
4 * 2005 Wim Taymans <[email protected]>
5 * 2011 Wim Taymans <[email protected]>
6 *
7 * gstquery.h: GstQuery API declaration
8 *
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
18 *
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
22 * Boston, MA 02110-1301, USA.
23 */
24
25
26#ifndef __GST_QUERY_H__
27#define __GST_QUERY_H__
28
29#include <glib.h>
30#include <glib-object.h>
31#include <gst/gstconfig.h>
32
33G_BEGIN_DECLS
34
35typedef struct _GstQuery GstQuery;
36
37#include <gst/gstminiobject.h>
38
39/**
40 * GstQueryTypeFlags:
41 * @GST_QUERY_TYPE_UPSTREAM: Set if the query can travel upstream.
42 * @GST_QUERY_TYPE_DOWNSTREAM: Set if the query can travel downstream.
43 * @GST_QUERY_TYPE_SERIALIZED: Set if the query should be serialized with data
44 * flow.
45 *
46 * #GstQueryTypeFlags indicate the aspects of the different #GstQueryType
47 * values. You can get the type flags of a #GstQueryType with the
48 * gst_query_type_get_flags() function.
49 */
50typedef enum {
51 GST_QUERY_TYPE_UPSTREAM = 1 << 0,
52 GST_QUERY_TYPE_DOWNSTREAM = 1 << 1,
53 GST_QUERY_TYPE_SERIALIZED = 1 << 2
54} GstQueryTypeFlags;
55
56/**
57 * GST_QUERY_TYPE_BOTH: (value 3) (type GstQueryTypeFlags)
58 *
59 * The same thing as #GST_QUERY_TYPE_UPSTREAM | #GST_QUERY_TYPE_DOWNSTREAM.
60 */
61#define GST_QUERY_TYPE_BOTH \
62 ((GstQueryTypeFlags)(GST_QUERY_TYPE_UPSTREAM | GST_QUERY_TYPE_DOWNSTREAM))
63
64#define GST_QUERY_NUM_SHIFT (8)
65
66/**
67 * GST_QUERY_MAKE_TYPE:
68 * @num: the query number to create
69 * @flags: the query flags
70 *
71 * when making custom query types, use this macro with the num and
72 * the given flags
73 */
74#define GST_QUERY_MAKE_TYPE(num,flags) \
75 (((num) << GST_QUERY_NUM_SHIFT) | (flags))
76
77#define FLAG(name) GST_QUERY_TYPE_##name
78
79
80/**
81 * GstQueryType:
82 * @GST_QUERY_UNKNOWN: unknown query type
83 * @GST_QUERY_POSITION: current position in stream
84 * @GST_QUERY_DURATION: total duration of the stream
85 * @GST_QUERY_LATENCY: latency of stream
86 * @GST_QUERY_JITTER: current jitter of stream
87 * @GST_QUERY_RATE: current rate of the stream
88 * @GST_QUERY_SEEKING: seeking capabilities
89 * @GST_QUERY_SEGMENT: segment start/stop positions
90 * @GST_QUERY_CONVERT: convert values between formats
91 * @GST_QUERY_FORMATS: query supported formats for convert
92 * @GST_QUERY_BUFFERING: query available media for efficient seeking.
93 * @GST_QUERY_CUSTOM: a custom application or element defined query.
94 * @GST_QUERY_URI: query the URI of the source or sink.
95 * @GST_QUERY_ALLOCATION: the buffer allocation properties
96 * @GST_QUERY_SCHEDULING: the scheduling properties
97 * @GST_QUERY_ACCEPT_CAPS: the accept caps query
98 * @GST_QUERY_CAPS: the caps query
99 * @GST_QUERY_DRAIN: wait till all serialized data is consumed downstream
100 * @GST_QUERY_CONTEXT: query the pipeline-local context from
101 * downstream or upstream (since 1.2)
102 * @GST_QUERY_BITRATE: the bitrate query (since 1.16)
103 *
104 * Standard predefined Query types
105 */
106/* NOTE: don't forget to update the table in gstquery.c when changing
107 * this enum */
108typedef enum {
109 GST_QUERY_UNKNOWN = GST_QUERY_MAKE_TYPE (0, 0),
110 GST_QUERY_POSITION = GST_QUERY_MAKE_TYPE (10, FLAG(BOTH)),
111 GST_QUERY_DURATION = GST_QUERY_MAKE_TYPE (20, FLAG(BOTH)),
112 GST_QUERY_LATENCY = GST_QUERY_MAKE_TYPE (30, FLAG(BOTH)),
113 GST_QUERY_JITTER = GST_QUERY_MAKE_TYPE (40, FLAG(BOTH)),
114 GST_QUERY_RATE = GST_QUERY_MAKE_TYPE (50, FLAG(BOTH)),
115 GST_QUERY_SEEKING = GST_QUERY_MAKE_TYPE (60, FLAG(BOTH)),
116 GST_QUERY_SEGMENT = GST_QUERY_MAKE_TYPE (70, FLAG(BOTH)),
117 GST_QUERY_CONVERT = GST_QUERY_MAKE_TYPE (80, FLAG(BOTH)),
118 GST_QUERY_FORMATS = GST_QUERY_MAKE_TYPE (90, FLAG(BOTH)),
119 GST_QUERY_BUFFERING = GST_QUERY_MAKE_TYPE (110, FLAG(BOTH)),
120 GST_QUERY_CUSTOM = GST_QUERY_MAKE_TYPE (120, FLAG(BOTH)),
121 GST_QUERY_URI = GST_QUERY_MAKE_TYPE (130, FLAG(BOTH)),
122 GST_QUERY_ALLOCATION = GST_QUERY_MAKE_TYPE (140, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
123 GST_QUERY_SCHEDULING = GST_QUERY_MAKE_TYPE (150, FLAG(UPSTREAM)),
124 GST_QUERY_ACCEPT_CAPS = GST_QUERY_MAKE_TYPE (160, FLAG(BOTH)),
125 GST_QUERY_CAPS = GST_QUERY_MAKE_TYPE (170, FLAG(BOTH)),
126 GST_QUERY_DRAIN = GST_QUERY_MAKE_TYPE (180, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
127 GST_QUERY_CONTEXT = GST_QUERY_MAKE_TYPE (190, FLAG(BOTH)),
128 GST_QUERY_BITRATE = GST_QUERY_MAKE_TYPE (200, FLAG(DOWNSTREAM)),
129} GstQueryType;
130#undef FLAG
131
132GST_API GType _gst_query_type;
133
134#define GST_TYPE_QUERY (_gst_query_type)
135#define GST_IS_QUERY(obj) (GST_IS_MINI_OBJECT_TYPE (obj, GST_TYPE_QUERY))
136#define GST_QUERY_CAST(obj) ((GstQuery*)(obj))
137#define GST_QUERY(obj) (GST_QUERY_CAST(obj))
138
139/**
140 * GST_QUERY_TYPE:
141 * @query: the query to query
142 *
143 * Get the #GstQueryType of the query.
144 */
145#define GST_QUERY_TYPE(query) (((GstQuery*)(query))->type)
146
147/**
148 * GST_QUERY_TYPE_NAME:
149 * @query: the query to query
150 *
151 * Get a constant string representation of the #GstQueryType of the query.
152 */
153#define GST_QUERY_TYPE_NAME(query) (gst_query_type_get_name(GST_QUERY_TYPE(query)))
154
155/**
156 * GST_QUERY_IS_UPSTREAM:
157 * @ev: the query to query
158 *
159 * Check if an query can travel upstream.
160 */
161#define GST_QUERY_IS_UPSTREAM(ev) !!(GST_QUERY_TYPE (ev) & GST_QUERY_TYPE_UPSTREAM)
162/**
163 * GST_QUERY_IS_DOWNSTREAM:
164 * @ev: the query to query
165 *
166 * Check if an query can travel downstream.
167 */
168#define GST_QUERY_IS_DOWNSTREAM(ev) !!(GST_QUERY_TYPE (ev) & GST_QUERY_TYPE_DOWNSTREAM)
169/**
170 * GST_QUERY_IS_SERIALIZED:
171 * @ev: the query to query
172 *
173 * Check if an query is serialized with the data stream.
174 */
175#define GST_QUERY_IS_SERIALIZED(ev) !!(GST_QUERY_TYPE (ev) & GST_QUERY_TYPE_SERIALIZED)
176
177
178/**
179 * GstQuery:
180 * @mini_object: The parent #GstMiniObject type
181 * @type: the #GstQueryType
182 *
183 * The #GstQuery structure.
184 */
185struct _GstQuery
186{
187 GstMiniObject mini_object;
188
189 /*< public > *//* with COW */
190 GstQueryType type;
191};
192
193/**
194 * GstBufferingMode:
195 * @GST_BUFFERING_STREAM: a small amount of data is buffered
196 * @GST_BUFFERING_DOWNLOAD: the stream is being downloaded
197 * @GST_BUFFERING_TIMESHIFT: the stream is being downloaded in a ringbuffer
198 * @GST_BUFFERING_LIVE: the stream is a live stream
199 *
200 * The different types of buffering methods.
201 */
202typedef enum {
203 GST_BUFFERING_STREAM,
204 GST_BUFFERING_DOWNLOAD,
205 GST_BUFFERING_TIMESHIFT,
206 GST_BUFFERING_LIVE
207} GstBufferingMode;
208
209#include <gst/gstiterator.h>
210#include <gst/gststructure.h>
211#include <gst/gstformat.h>
212#include <gst/gstpad.h>
213#include <gst/gstallocator.h>
214#include <gst/gsttoc.h>
215#include <gst/gstcontext.h>
216
217GST_API
218const gchar* gst_query_type_get_name (GstQueryType type);
219
220GST_API
221GQuark gst_query_type_to_quark (GstQueryType type);
222
223GST_API
224GstQueryTypeFlags
225 gst_query_type_get_flags (GstQueryType type);
226
227
228GST_API
229GType gst_query_get_type (void);
230
231/* refcounting */
232/**
233 * gst_query_ref:
234 * @q: a #GstQuery to increase the refcount of.
235 *
236 * Increases the refcount of the given query by one.
237 *
238 * Returns: @q
239 */
240static inline GstQuery *
241gst_query_ref (GstQuery * q)
242{
243 return GST_QUERY_CAST (gst_mini_object_ref (GST_MINI_OBJECT_CAST (q)));
244}
245
246/**
247 * gst_query_unref:
248 * @q: a #GstQuery to decrease the refcount of.
249 *
250 * Decreases the refcount of the query. If the refcount reaches 0, the query
251 * will be freed.
252 */
253static inline void
254gst_query_unref (GstQuery * q)
255{
256 gst_mini_object_unref (GST_MINI_OBJECT_CAST (q));
257}
258
259/**
260 * gst_clear_query: (skip)
261 * @query_ptr: a pointer to a #GstQuery reference
262 *
263 * Clears a reference to a #GstQuery.
264 *
265 * @query_ptr must not be %NULL.
266 *
267 * If the reference is %NULL then this function does nothing. Otherwise, the
268 * reference count of the query is decreased and the pointer is set to %NULL.
269 *
270 * Since: 1.16
271 */
272static inline void
273gst_clear_query (GstQuery ** query_ptr)
274{
275 gst_clear_mini_object ((GstMiniObject **) query_ptr);
276}
277
278/* copy query */
279/**
280 * gst_query_copy:
281 * @q: a #GstQuery to copy.
282 *
283 * Copies the given query using the copy function of the parent #GstStructure.
284 *
285 * Free-function: gst_query_unref
286 *
287 * Returns: (transfer full): a new copy of @q.
288 */
289static inline GstQuery *
290gst_query_copy (const GstQuery * q)
291{
292 return GST_QUERY_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (q)));
293}
294
295/**
296 * gst_query_is_writable:
297 * @q: a #GstQuery
298 *
299 * Tests if you can safely write data into a query's structure.
300 */
301#define gst_query_is_writable(q) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (q))
302/**
303 * gst_query_make_writable:
304 * @q: (transfer full): a #GstQuery to make writable
305 *
306 * Makes a writable query from the given query.
307 *
308 * Returns: (transfer full): a new writable query (possibly same as @q)
309 */
310#define gst_query_make_writable(q) GST_QUERY_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (q)))
311/**
312 * gst_query_replace:
313 * @old_query: (inout) (transfer full) (nullable): pointer to a pointer to a
314 * #GstQuery to be replaced.
315 * @new_query: (allow-none) (transfer none): pointer to a #GstQuery that will
316 * replace the query pointed to by @old_query.
317 *
318 * Modifies a pointer to a #GstQuery to point to a different #GstQuery. The
319 * modification is done atomically (so this is useful for ensuring thread safety
320 * in some cases), and the reference counts are updated appropriately (the old
321 * query is unreffed, the new one is reffed).
322 *
323 * Either @new_query or the #GstQuery pointed to by @old_query may be %NULL.
324 *
325 * Returns: %TRUE if @new_query was different from @old_query
326 */
327static inline gboolean
328gst_query_replace (GstQuery **old_query, GstQuery *new_query)
329{
330 return gst_mini_object_replace ((GstMiniObject **) old_query, (GstMiniObject *) new_query);
331}
332
333/**
334 * gst_query_take:
335 * @old_query: (inout) (transfer full) (nullable): pointer to a
336 * pointer to a #GstQuery to be stolen.
337 * @new_query: (allow-none) (transfer full): pointer to a #GstQuery that will
338 * replace the query pointed to by @old_query.
339 *
340 * Modifies a pointer to a #GstQuery to point to a different #GstQuery. This
341 * function is similar to gst_query_replace() except that it takes ownership of
342 * @new_query.
343 *
344 * Either @new_query or the #GstQuery pointed to by @old_query may be %NULL.
345 *
346 * Returns: %TRUE if @new_query was different from @old_query
347 *
348 * Since: 1.16
349 */
350static inline gboolean
351gst_query_take (GstQuery **old_query, GstQuery *new_query)
352{
353 return gst_mini_object_take ((GstMiniObject **) old_query,
354 (GstMiniObject *) new_query);
355}
356
357/* application specific query */
358
359GST_API
360GstQuery * gst_query_new_custom (GstQueryType type, GstStructure *structure) G_GNUC_MALLOC;
361
362GST_API
363const GstStructure *
364 gst_query_get_structure (GstQuery *query);
365
366GST_API
367GstStructure * gst_query_writable_structure (GstQuery *query);
368
369/* position query */
370
371GST_API
372GstQuery* gst_query_new_position (GstFormat format) G_GNUC_MALLOC;
373
374GST_API
375void gst_query_set_position (GstQuery *query, GstFormat format, gint64 cur);
376
377GST_API
378void gst_query_parse_position (GstQuery *query, GstFormat *format, gint64 *cur);
379
380/* duration query */
381
382GST_API
383GstQuery* gst_query_new_duration (GstFormat format) G_GNUC_MALLOC;
384
385GST_API
386void gst_query_set_duration (GstQuery *query, GstFormat format, gint64 duration);
387
388GST_API
389void gst_query_parse_duration (GstQuery *query, GstFormat *format, gint64 *duration);
390
391/* latency query */
392
393GST_API
394GstQuery* gst_query_new_latency (void) G_GNUC_MALLOC;
395
396GST_API
397void gst_query_set_latency (GstQuery *query, gboolean live, GstClockTime min_latency,
398 GstClockTime max_latency);
399
400GST_API
401void gst_query_parse_latency (GstQuery *query, gboolean *live, GstClockTime *min_latency,
402 GstClockTime *max_latency);
403
404/* convert query */
405
406GST_API
407GstQuery* gst_query_new_convert (GstFormat src_format, gint64 value, GstFormat dest_format) G_GNUC_MALLOC;
408
409GST_API
410void gst_query_set_convert (GstQuery *query, GstFormat src_format, gint64 src_value,
411 GstFormat dest_format, gint64 dest_value);
412
413GST_API
414void gst_query_parse_convert (GstQuery *query, GstFormat *src_format, gint64 *src_value,
415 GstFormat *dest_format, gint64 *dest_value);
416/* segment query */
417
418GST_API
419GstQuery* gst_query_new_segment (GstFormat format) G_GNUC_MALLOC;
420
421GST_API
422void gst_query_set_segment (GstQuery *query, gdouble rate, GstFormat format,
423 gint64 start_value, gint64 stop_value);
424
425GST_API
426void gst_query_parse_segment (GstQuery *query, gdouble *rate, GstFormat *format,
427 gint64 *start_value, gint64 *stop_value);
428
429/* seeking query */
430
431GST_API
432GstQuery* gst_query_new_seeking (GstFormat format) G_GNUC_MALLOC;
433
434GST_API
435void gst_query_set_seeking (GstQuery *query, GstFormat format,
436 gboolean seekable,
437 gint64 segment_start,
438 gint64 segment_end);
439
440GST_API
441void gst_query_parse_seeking (GstQuery *query, GstFormat *format,
442 gboolean *seekable,
443 gint64 *segment_start,
444 gint64 *segment_end);
445/* formats query */
446
447GST_API
448GstQuery* gst_query_new_formats (void) G_GNUC_MALLOC;
449
450GST_API
451void gst_query_set_formats (GstQuery *query, gint n_formats, ...);
452
453GST_API
454void gst_query_set_formatsv (GstQuery *query, gint n_formats, const GstFormat *formats);
455
456GST_API
457void gst_query_parse_n_formats (GstQuery *query, guint *n_formats);
458
459GST_API
460void gst_query_parse_nth_format (GstQuery *query, guint nth, GstFormat *format);
461
462/* buffering query */
463
464GST_API
465GstQuery* gst_query_new_buffering (GstFormat format) G_GNUC_MALLOC;
466
467GST_API
468void gst_query_set_buffering_percent (GstQuery *query, gboolean busy, gint percent);
469
470GST_API
471void gst_query_parse_buffering_percent (GstQuery *query, gboolean *busy, gint *percent);
472
473GST_API
474void gst_query_set_buffering_stats (GstQuery *query, GstBufferingMode mode,
475 gint avg_in, gint avg_out,
476 gint64 buffering_left);
477
478GST_API
479void gst_query_parse_buffering_stats (GstQuery *query, GstBufferingMode *mode,
480 gint *avg_in, gint *avg_out,
481 gint64 *buffering_left);
482
483GST_API
484void gst_query_set_buffering_range (GstQuery *query, GstFormat format,
485 gint64 start, gint64 stop,
486 gint64 estimated_total);
487
488GST_API
489void gst_query_parse_buffering_range (GstQuery *query, GstFormat *format,
490 gint64 *start, gint64 *stop,
491 gint64 *estimated_total);
492
493GST_API
494gboolean gst_query_add_buffering_range (GstQuery *query,
495 gint64 start, gint64 stop);
496
497GST_API
498guint gst_query_get_n_buffering_ranges (GstQuery *query);
499
500GST_API
501gboolean gst_query_parse_nth_buffering_range (GstQuery *query,
502 guint index, gint64 *start,
503 gint64 *stop);
504
505/* URI query */
506
507GST_API
508GstQuery * gst_query_new_uri (void) G_GNUC_MALLOC;
509
510GST_API
511void gst_query_parse_uri (GstQuery *query, gchar **uri);
512
513GST_API
514void gst_query_set_uri (GstQuery *query, const gchar *uri);
515
516GST_API
517void gst_query_parse_uri_redirection (GstQuery *query, gchar **uri);
518
519GST_API
520void gst_query_set_uri_redirection (GstQuery *query, const gchar *uri);
521
522GST_API
523void gst_query_parse_uri_redirection_permanent (GstQuery *query, gboolean * permanent);
524
525GST_API
526void gst_query_set_uri_redirection_permanent (GstQuery *query, gboolean permanent);
527
528/* allocation query */
529
530GST_API
531GstQuery * gst_query_new_allocation (GstCaps *caps, gboolean need_pool) G_GNUC_MALLOC;
532
533GST_API
534void gst_query_parse_allocation (GstQuery *query, GstCaps **caps, gboolean *need_pool);
535
536/* pools */
537
538GST_API
539void gst_query_add_allocation_pool (GstQuery *query, GstBufferPool *pool,
540 guint size, guint min_buffers,
541 guint max_buffers);
542
543GST_API
544guint gst_query_get_n_allocation_pools (GstQuery *query);
545
546GST_API
547void gst_query_parse_nth_allocation_pool (GstQuery *query, guint index,
548 GstBufferPool **pool,
549 guint *size, guint *min_buffers,
550 guint *max_buffers);
551
552GST_API
553void gst_query_set_nth_allocation_pool (GstQuery *query, guint index,
554 GstBufferPool *pool,
555 guint size, guint min_buffers,
556 guint max_buffers);
557
558GST_API
559void gst_query_remove_nth_allocation_pool (GstQuery *query, guint index);
560
561/* allocators */
562
563GST_API
564void gst_query_add_allocation_param (GstQuery *query, GstAllocator *allocator,
565 const GstAllocationParams *params);
566
567GST_API
568guint gst_query_get_n_allocation_params (GstQuery *query);
569
570GST_API
571void gst_query_parse_nth_allocation_param (GstQuery *query, guint index,
572 GstAllocator **allocator,
573 GstAllocationParams *params);
574
575GST_API
576void gst_query_set_nth_allocation_param (GstQuery *query, guint index,
577 GstAllocator *allocator,
578 const GstAllocationParams *params);
579
580GST_API
581void gst_query_remove_nth_allocation_param (GstQuery *query, guint index);
582
583/* metadata */
584
585GST_API
586void gst_query_add_allocation_meta (GstQuery *query, GType api, const GstStructure *params);
587
588GST_API
589guint gst_query_get_n_allocation_metas (GstQuery *query);
590
591GST_API
592GType gst_query_parse_nth_allocation_meta (GstQuery *query, guint index,
593 const GstStructure **params);
594
595GST_API
596void gst_query_remove_nth_allocation_meta (GstQuery *query, guint index);
597
598GST_API
599gboolean gst_query_find_allocation_meta (GstQuery *query, GType api, guint *index);
600
601
602/* scheduling query */
603/**
604 * GstSchedulingFlags:
605 * @GST_SCHEDULING_FLAG_SEEKABLE: if seeking is possible
606 * @GST_SCHEDULING_FLAG_SEQUENTIAL: if sequential access is recommended
607 * @GST_SCHEDULING_FLAG_BANDWIDTH_LIMITED: if bandwidth is limited and buffering possible (since 1.2)
608 *
609 * The different scheduling flags.
610 */
611typedef enum {
612 GST_SCHEDULING_FLAG_SEEKABLE = (1 << 0),
613 GST_SCHEDULING_FLAG_SEQUENTIAL = (1 << 1),
614 GST_SCHEDULING_FLAG_BANDWIDTH_LIMITED = (1 << 2)
615} GstSchedulingFlags;
616
617GST_API
618GstQuery * gst_query_new_scheduling (void) G_GNUC_MALLOC;
619
620GST_API
621void gst_query_set_scheduling (GstQuery *query, GstSchedulingFlags flags,
622 gint minsize, gint maxsize, gint align);
623
624GST_API
625void gst_query_parse_scheduling (GstQuery *query, GstSchedulingFlags *flags,
626 gint *minsize, gint *maxsize, gint *align);
627
628GST_API
629void gst_query_add_scheduling_mode (GstQuery *query, GstPadMode mode);
630
631GST_API
632guint gst_query_get_n_scheduling_modes (GstQuery *query);
633
634GST_API
635GstPadMode gst_query_parse_nth_scheduling_mode (GstQuery *query, guint index);
636
637GST_API
638gboolean gst_query_has_scheduling_mode (GstQuery *query, GstPadMode mode);
639
640GST_API
641gboolean gst_query_has_scheduling_mode_with_flags (GstQuery * query, GstPadMode mode,
642 GstSchedulingFlags flags);
643
644/* accept-caps query */
645
646GST_API
647GstQuery * gst_query_new_accept_caps (GstCaps *caps) G_GNUC_MALLOC;
648
649GST_API
650void gst_query_parse_accept_caps (GstQuery *query, GstCaps **caps);
651
652GST_API
653void gst_query_set_accept_caps_result (GstQuery *query, gboolean result);
654
655GST_API
656void gst_query_parse_accept_caps_result (GstQuery *query, gboolean *result);
657
658/* caps query */
659
660GST_API
661GstQuery * gst_query_new_caps (GstCaps *filter) G_GNUC_MALLOC;
662
663GST_API
664void gst_query_parse_caps (GstQuery *query, GstCaps **filter);
665
666GST_API
667void gst_query_set_caps_result (GstQuery *query, GstCaps *caps);
668
669GST_API
670void gst_query_parse_caps_result (GstQuery *query, GstCaps **caps);
671
672/* drain query */
673
674GST_API
675GstQuery * gst_query_new_drain (void) G_GNUC_MALLOC;
676
677/* context query */
678
679GST_API
680GstQuery * gst_query_new_context (const gchar * context_type) G_GNUC_MALLOC;
681
682GST_API
683gboolean gst_query_parse_context_type (GstQuery * query, const gchar ** context_type);
684
685GST_API
686void gst_query_set_context (GstQuery *query, GstContext *context);
687
688GST_API
689void gst_query_parse_context (GstQuery *query, GstContext **context);
690
691/* bitrate query */
692
693GST_API
694GstQuery * gst_query_new_bitrate (void) G_GNUC_MALLOC;
695
696GST_API
697void gst_query_set_bitrate (GstQuery * query, guint nominal_bitrate);
698
699GST_API
700void gst_query_parse_bitrate (GstQuery * query, guint * nominal_bitrate);
701
702#ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
703G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstQuery, gst_query_unref)
704#endif
705
706G_END_DECLS
707
708#endif /* __GST_QUERY_H__ */
709
710