summaryrefslogtreecommitdiff
path: root/src/pulse/introspect.h
blob: 43389b7364584d6f0393e3a490714dbe155c01b1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
#ifndef foointrospecthfoo
#define foointrospecthfoo

/***
  This file is part of PulseAudio.

  Copyright 2004-2006 Lennart Poettering
  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB

  PulseAudio is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as published
  by the Free Software Foundation; either version 2.1 of the License,
  or (at your option) any later version.

  PulseAudio 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
  General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/

#include <inttypes.h>

#include <pulse/operation.h>
#include <pulse/context.h>
#include <pulse/cdecl.h>
#include <pulse/gccmacro.h>
#include <pulse/channelmap.h>
#include <pulse/volume.h>
#include <pulse/proplist.h>
#include <pulse/format.h>
#include <pulse/version.h>

/** \page introspect Server Query and Control
 *
 * \section overv_sec Overview
 *
 * Sometimes it is necessary to query and modify global settings in the
 * server. For this, PulseAudio has the introspection API. It can list sinks,
 * sources, samples and other aspects of the server. It can also modify the
 * attributes of the server that will affect operations on a global level,
 * and not just the application's context.
 *
 * \section query_sec Querying
 *
 * All querying is done through callbacks. This approach is necessary to
 * maintain an asynchronous design. The client will request the information
 * and some time later, the server will respond with the desired data.
 *
 * Some objects can have multiple instances on the server. When requesting all
 * of these at once, the callback will be called multiple times, once for
 * each object. When the list has been exhausted, the callback will be called
 * without an information structure and the eol parameter set to a positive
 * value.
 *
 * Note that even if a single object is requested, and not the entire list,
 * the terminating call will still be made.
 *
 * If an error occurs, the callback will be invoked without an information
 * structure and eol set to a negative value..
 *
 * Data members in the information structures are only valid during the
 * duration of the callback. If they are required after the callback is
 * finished, a deep copy of the information structure must be performed.
 *
 * \subsection server_subsec Server Information
 *
 * The server can be queried about its name, the environment it's running on
 * and the currently active global defaults. Calling
 * pa_context_get_server_info() provides access to a pa_server_info structure
 * containing all of these.
 *
 * \subsection memstat_subsec Memory Usage
 *
 * Statistics about memory usage can be fetched using pa_context_stat(),
 * giving a pa_stat_info structure.
 *
 * \subsection sinksrc_subsec Sinks and Sources
 *
 * The server can have an arbitrary number of sinks and sources. Each sink
 * and source have both an index and a name associated with it. As such,
 * there are three ways to get access to them:
 *
 * \li By index - pa_context_get_sink_info_by_index() /
 *                pa_context_get_source_info_by_index()
 * \li By name - pa_context_get_sink_info_by_name() /
 *               pa_context_get_source_info_by_name()
 * \li All - pa_context_get_sink_info_list() /
 *           pa_context_get_source_info_list()
 *
 * All three method use the same callback and will provide a pa_sink_info or
 * pa_source_info structure.
 *
 * \subsection siso_subsec Sink Inputs and Source Outputs
 *
 * Sink inputs and source outputs are the representations of the client ends
 * of streams inside the server. I.e. they connect a client stream to one of
 * the global sinks or sources.
 *
 * Sink inputs and source outputs only have an index to identify them. As
 * such, there are only two ways to get information about them:
 *
 * \li By index - pa_context_get_sink_input_info() /
 *                pa_context_get_source_output_info()
 * \li All - pa_context_get_sink_input_info_list() /
 *           pa_context_get_source_output_info_list()
 *
 * The structure returned is the pa_sink_input_info or pa_source_output_info
 * structure.
 *
 * \subsection samples_subsec Samples
 *
 * The list of cached samples can be retrieved from the server. Three methods
 * exist for querying the sample cache list:
 *
 * \li By index - pa_context_get_sample_info_by_index()
 * \li By name - pa_context_get_sample_info_by_name()
 * \li All - pa_context_get_sample_info_list()
 *
 * Note that this only retrieves information about the sample, not the sample
 * data itself.
 *
 * \subsection module_subsec Driver Modules
 *
 * PulseAudio driver modules are identified by index and are retrieved using either
 * pa_context_get_module_info() or pa_context_get_module_info_list(). The
 * information structure is called pa_module_info.
 *
 * \subsection client_subsec Clients
 *
 * PulseAudio clients are also identified by index and are retrieved using
 * either pa_context_get_client_info() or pa_context_get_client_info_list().
 * The information structure is called pa_client_info.
 *
 * \section ctrl_sec Control
 *
 * Some parts of the server are only possible to read, but most can also be
 * modified in different ways. Note that these changes will affect all
 * connected clients and not just the one issuing the request.
 *
 * \subsection sinksrc_subsec Sinks and Sources
 *
 * The most common change one would want to apply to sinks and sources is to
 * modify the volume of the audio. Identically to how sinks and sources can
 * be queried, there are two ways of identifying them:
 *
 * \li By index - pa_context_set_sink_volume_by_index() /
 *                pa_context_set_source_volume_by_index()
 * \li By name - pa_context_set_sink_volume_by_name() /
 *               pa_context_set_source_volume_by_name()
 *
 * It is also possible to mute a sink or source:
 *
 * \li By index - pa_context_set_sink_mute_by_index() /
 *                pa_context_set_source_mute_by_index()
 * \li By name - pa_context_set_sink_mute_by_name() /
 *               pa_context_set_source_mute_by_name()
 *
 * \subsection siso_subsec Sink Inputs and Source Outputs
 *
 * If an application desires to modify the volume of just a single stream
 * (commonly one of its own streams), this can be done by setting the volume
 * of its associated sink input or source output, using
 * pa_context_set_sink_input_volume() or pa_context_set_source_output_volume().
 *
 * It is also possible to remove sink inputs and source outputs, terminating
 * the streams associated with them:
 *
 * \li Sink input - pa_context_kill_sink_input()
 * \li Source output - pa_context_kill_source_output()
 *
 * It is strongly recommended that all volume changes are done as a direct
 * result of user input. With automated requests, such as those resulting
 * from misguided attempts of crossfading, PulseAudio can store the stream
 * volume at an inappropriate moment and restore it later. Besides, such
 * attempts lead to OSD popups in some desktop environments.
 *
 * As a special case of the general rule above, it is recommended that your
 * application leaves the task of saving and restoring the volume of its
 * streams to PulseAudio and does not attempt to do it by itself. PulseAudio
 * really knows better about events such as stream moving or headphone
 * plugging that would make the volume stored by the application inapplicable
 * to the new configuration.
 *
 * Another important case where setting a sink input volume may be a bad idea
 * is related to interpreters that interpret potentially untrusted scripts.
 * PulseAudio relies on your application not making malicious requests (such
 * as repeatedly setting the volume to 100%). Thus, script interpreters that
 * represent a security boundary must sandbox volume-changing requests coming
 * from their scripts. In the worst case, it may be necessary to apply the
 * script-requested volume to the script-produced sounds by altering the
 * samples in the script interpreter and not touching the sink or sink input
 * volume as seen by PulseAudio.
 *
 * If an application changes any volume, it should also listen to changes of
 * the same volume originating from outside the application (e.g., from the
 * system mixer application) and update its user interface accordingly. Use
 * \ref subscribe to get such notifications.
 *
 * \subsection module_subsec Modules
 *
 * Server modules can be remotely loaded and unloaded using
 * pa_context_load_module() and pa_context_unload_module().
 *
 * \subsection client_subsec Clients
 *
 * The only operation supported on clients is the possibility of kicking
 * them off the server using pa_context_kill_client().
 */

/** \file
 *
 * Routines for daemon introspection.
 *
 * See also \subpage introspect
 */

PA_C_DECL_BEGIN

/** @{ \name Sinks */

/** Stores information about a specific port of a sink.  Please
 * note that this structure can be extended as part of evolutionary
 * API updates at any time in any new release. \since 0.9.16 */
typedef struct pa_sink_port_info {
    const char *name;                   /**< Name of this port */
    const char *description;            /**< Description of this port */
    uint32_t priority;                  /**< The higher this value is, the more useful this port is as a default. */
    int available;                      /**< A flags (see #pa_port_available), indicating availability status of this port. \since 2.0 */
} pa_sink_port_info;

/** Stores information about sinks. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
typedef struct pa_sink_info {
    const char *name;                  /**< Name of the sink */
    uint32_t index;                    /**< Index of the sink */
    const char *description;           /**< Description of this sink */
    pa_sample_spec sample_spec;        /**< Sample spec of this sink */
    pa_channel_map channel_map;        /**< Channel map */
    uint32_t owner_module;             /**< Index of the owning module of this sink, or PA_INVALID_INDEX. */
    pa_cvolume volume;                 /**< Volume of the sink */
    int mute;                          /**< Mute switch of the sink */
    uint32_t monitor_source;           /**< Index of the monitor source connected to this sink. */
    const char *monitor_source_name;   /**< The name of the monitor source. */
    pa_usec_t latency;                 /**< Length of queued audio in the output buffer. */
    const char *driver;                /**< Driver name */
    pa_sink_flags_t flags;             /**< Flags */
    pa_proplist *proplist;             /**< Property list \since 0.9.11 */
    pa_usec_t configured_latency;      /**< The latency this device has been configured to. \since 0.9.11 */
    pa_volume_t base_volume;           /**< Some kind of "base" volume that refers to unamplified/unattenuated volume in the context of the output device. \since 0.9.15 */
    pa_sink_state_t state;             /**< State \since 0.9.15 */
    uint32_t n_volume_steps;           /**< Number of volume steps for sinks which do not support arbitrary volumes. \since 0.9.15 */
    uint32_t card;                     /**< Card index, or PA_INVALID_INDEX. \since 0.9.15 */
    uint32_t n_ports;                  /**< Number of entries in port array \since 0.9.16 */
    pa_sink_port_info** ports;         /**< Array of available ports, or NULL. Array is terminated by an entry set to NULL. The number of entries is stored in n_ports. \since 0.9.16 */
    pa_sink_port_info* active_port;    /**< Pointer to active port in the array, or NULL. \since 0.9.16 */
    uint8_t n_formats;                 /**< Number of formats supported by the sink. \since 1.0 */
    pa_format_info **formats;          /**< Array of formats supported by the sink. \since 1.0 */
} pa_sink_info;

/** Callback prototype for pa_context_get_sink_info_by_name() and friends */
typedef void (*pa_sink_info_cb_t)(pa_context *c, const pa_sink_info *i, int eol, void *userdata);

/** Get information about a sink by its name */
pa_operation* pa_context_get_sink_info_by_name(pa_context *c, const char *name, pa_sink_info_cb_t cb, void *userdata);

/** Get information about a sink by its index */
pa_operation* pa_context_get_sink_info_by_index(pa_context *c, uint32_t idx, pa_sink_info_cb_t cb, void *userdata);

/** Get the complete sink list */
pa_operation* pa_context_get_sink_info_list(pa_context *c, pa_sink_info_cb_t cb, void *userdata);

/** Set the volume of a sink device specified by its index */
pa_operation* pa_context_set_sink_volume_by_index(pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);

/** Set the volume of a sink device specified by its name */
pa_operation* pa_context_set_sink_volume_by_name(pa_context *c, const char *name, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);

/** Set the mute switch of a sink device specified by its index */
pa_operation* pa_context_set_sink_mute_by_index(pa_context *c, uint32_t idx, int mute, pa_context_success_cb_t cb, void *userdata);

/** Set the mute switch of a sink device specified by its name */
pa_operation* pa_context_set_sink_mute_by_name(pa_context *c, const char *name, int mute, pa_context_success_cb_t cb, void *userdata);

/** Suspend/Resume a sink. \since 0.9.7 */
pa_operation* pa_context_suspend_sink_by_name(pa_context *c, const char *sink_name, int suspend, pa_context_success_cb_t cb, void* userdata);

/** Suspend/Resume a sink. If idx is PA_INVALID_INDEX all sinks will be suspended. \since 0.9.7 */
pa_operation* pa_context_suspend_sink_by_index(pa_context *c, uint32_t idx, int suspend,  pa_context_success_cb_t cb, void* userdata);

/** Change the profile of a sink. \since 0.9.16 */
pa_operation* pa_context_set_sink_port_by_index(pa_context *c, uint32_t idx, const char*port, pa_context_success_cb_t cb, void *userdata);

/** Change the profile of a sink. \since 0.9.15 */
pa_operation* pa_context_set_sink_port_by_name(pa_context *c, const char*name, const char*port, pa_context_success_cb_t cb, void *userdata);

/** @} */

/** @{ \name Sources */

/** Stores information about a specific port of a source.  Please
 * note that this structure can be extended as part of evolutionary
 * API updates at any time in any new release. \since 0.9.16 */
typedef struct pa_source_port_info {
    const char *name;                   /**< Name of this port */
    const char *description;            /**< Description of this port */
    uint32_t priority;                  /**< The higher this value is, the more useful this port is as a default. */
    int available;                      /**< A flags (see #pa_port_available), indicating availability status of this port. \since 2.0 */
} pa_source_port_info;

/** Stores information about sources. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
typedef struct pa_source_info {
    const char *name;                   /**< Name of the source */
    uint32_t index;                     /**< Index of the source */
    const char *description;            /**< Description of this source */
    pa_sample_spec sample_spec;         /**< Sample spec of this source */
    pa_channel_map channel_map;         /**< Channel map */
    uint32_t owner_module;              /**< Owning module index, or PA_INVALID_INDEX. */
    pa_cvolume volume;                  /**< Volume of the source */
    int mute;                           /**< Mute switch of the sink */
    uint32_t monitor_of_sink;           /**< If this is a monitor source, the index of the owning sink, otherwise PA_INVALID_INDEX. */
    const char *monitor_of_sink_name;   /**< Name of the owning sink, or NULL. */
    pa_usec_t latency;                  /**< Length of filled record buffer of this source. */
    const char *driver;                 /**< Driver name */
    pa_source_flags_t flags;            /**< Flags */
    pa_proplist *proplist;              /**< Property list \since 0.9.11 */
    pa_usec_t configured_latency;       /**< The latency this device has been configured to. \since 0.9.11 */
    pa_volume_t base_volume;            /**< Some kind of "base" volume that refers to unamplified/unattenuated volume in the context of the input device. \since 0.9.15 */
    pa_source_state_t state;            /**< State \since 0.9.15 */
    uint32_t n_volume_steps;            /**< Number of volume steps for sources which do not support arbitrary volumes. \since 0.9.15 */
    uint32_t card;                      /**< Card index, or PA_INVALID_INDEX. \since 0.9.15 */
    uint32_t n_ports;                   /**< Number of entries in port array \since 0.9.16 */
    pa_source_port_info** ports;        /**< Array of available ports, or NULL. Array is terminated by an entry set to NULL. The number of entries is stored in n_ports. \since 0.9.16  */
    pa_source_port_info* active_port;   /**< Pointer to active port in the array, or NULL. \since 0.9.16  */
    uint8_t n_formats;                  /**< Number of formats supported by the source. \since 1.0 */
    pa_format_info **formats;           /**< Array of formats supported by the source. \since 1.0 */
} pa_source_info;

/** Callback prototype for pa_context_get_source_info_by_name() and friends */
typedef void (*pa_source_info_cb_t)(pa_context *c, const pa_source_info *i, int eol, void *userdata);

/** Get information about a source by its name */
pa_operation* pa_context_get_source_info_by_name(pa_context *c, const char *name, pa_source_info_cb_t cb, void *userdata);

/** Get information about a source by its index */
pa_operation* pa_context_get_source_info_by_index(pa_context *c, uint32_t idx, pa_source_info_cb_t cb, void *userdata);

/** Get the complete source list */
pa_operation* pa_context_get_source_info_list(pa_context *c, pa_source_info_cb_t cb, void *userdata);

/** Set the volume of a source device specified by its index */
pa_operation* pa_context_set_source_volume_by_index(pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);

/** Set the volume of a source device specified by its name */
pa_operation* pa_context_set_source_volume_by_name(pa_context *c, const char *name, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);

/** Set the mute switch of a source device specified by its index */
pa_operation* pa_context_set_source_mute_by_index(pa_context *c, uint32_t idx, int mute, pa_context_success_cb_t cb, void *userdata);

/** Set the mute switch of a source device specified by its name */
pa_operation* pa_context_set_source_mute_by_name(pa_context *c, const char *name, int mute, pa_context_success_cb_t cb, void *userdata);

/** Suspend/Resume a source. \since 0.9.7 */
pa_operation* pa_context_suspend_source_by_name(pa_context *c, const char *source_name, int suspend, pa_context_success_cb_t cb, void* userdata);

/** Suspend/Resume a source. If idx is PA_INVALID_INDEX, all sources will be suspended. \since 0.9.7 */
pa_operation* pa_context_suspend_source_by_index(pa_context *c, uint32_t idx, int suspend, pa_context_success_cb_t cb, void* userdata);

/** Change the profile of a source. \since 0.9.16 */
pa_operation* pa_context_set_source_port_by_index(pa_context *c, uint32_t idx, const char*port, pa_context_success_cb_t cb, void *userdata);

/** Change the profile of a source. \since 0.9.15 */
pa_operation* pa_context_set_source_port_by_name(pa_context *c, const char*name, const char*port, pa_context_success_cb_t cb, void *userdata);

/** @} */

/** @{ \name Server */

/** Server information. Please note that this structure can be
 * extended as part of evolutionary API updates at any time in any new
 * release. */
typedef struct pa_server_info {
    const char *user_name;              /**< User name of the daemon process */
    const char *host_name;              /**< Host name the daemon is running on */
    const char *server_version;         /**< Version string of the daemon */
    const char *server_name;            /**< Server package name (usually "pulseaudio") */
    pa_sample_spec sample_spec;         /**< Default sample specification */
    const char *default_sink_name;      /**< Name of default sink. */
    const char *default_source_name;    /**< Name of default source. */
    uint32_t cookie;                    /**< A random cookie for identifying this instance of PulseAudio. */
    pa_channel_map channel_map;         /**< Default channel map. \since 0.9.15 */
} pa_server_info;

/** Callback prototype for pa_context_get_server_info() */
typedef void (*pa_server_info_cb_t) (pa_context *c, const pa_server_info*i, void *userdata);

/** Get some information about the server */
pa_operation* pa_context_get_server_info(pa_context *c, pa_server_info_cb_t cb, void *userdata);

/** @} */

/** @{ \name Modules */

/** Stores information about modules. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
typedef struct pa_module_info {
    uint32_t index;                     /**< Index of the module */
    const char*name,                    /**< Name of the module */
        *argument;                      /**< Argument string of the module */
    uint32_t n_used;                    /**< Usage counter or PA_INVALID_INDEX */
/** \cond fulldocs */
    int auto_unload;                    /**< \deprecated Non-zero if this is an autoloaded module. */
/** \endcond */
    pa_proplist *proplist;              /**< Property list \since 0.9.15 */
} pa_module_info;

/** Callback prototype for pa_context_get_module_info() and friends */
typedef void (*pa_module_info_cb_t) (pa_context *c, const pa_module_info*i, int eol, void *userdata);

/** Get some information about a module by its index */
pa_operation* pa_context_get_module_info(pa_context *c, uint32_t idx, pa_module_info_cb_t cb, void *userdata);

/** Get the complete list of currently loaded modules */
pa_operation* pa_context_get_module_info_list(pa_context *c, pa_module_info_cb_t cb, void *userdata);

/** Callback prototype for pa_context_load_module() */
typedef void (*pa_context_index_cb_t)(pa_context *c, uint32_t idx, void *userdata);

/** Load a module. */
pa_operation* pa_context_load_module(pa_context *c, const char*name, const char *argument, pa_context_index_cb_t cb, void *userdata);

/** Unload a module. */
pa_operation* pa_context_unload_module(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);

/** @} */

/** @{ \name Clients */

/** Stores information about clients. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
typedef struct pa_client_info {
    uint32_t index;                      /**< Index of this client */
    const char *name;                    /**< Name of this client */
    uint32_t owner_module;               /**< Index of the owning module, or PA_INVALID_INDEX. */
    const char *driver;                  /**< Driver name */
    pa_proplist *proplist;               /**< Property list \since 0.9.11 */
} pa_client_info;

/** Callback prototype for pa_context_get_client_info() and friends */
typedef void (*pa_client_info_cb_t) (pa_context *c, const pa_client_info*i, int eol, void *userdata);

/** Get information about a client by its index */
pa_operation* pa_context_get_client_info(pa_context *c, uint32_t idx, pa_client_info_cb_t cb, void *userdata);

/** Get the complete client list */
pa_operation* pa_context_get_client_info_list(pa_context *c, pa_client_info_cb_t cb, void *userdata);

/** Kill a client. */
pa_operation* pa_context_kill_client(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);

/** @} */

/** @{ \name Cards */

/** \deprecated Superseded by pa_card_profile_info2 \since 0.9.15 */
typedef struct pa_card_profile_info {
    const char *name;                   /**< Name of this profile */
    const char *description;            /**< Description of this profile */
    uint32_t n_sinks;                   /**< Number of sinks this profile would create */
    uint32_t n_sources;                 /**< Number of sources this profile would create */
    uint32_t priority;                  /**< The higher this value is, the more useful this profile is as a default. */
} pa_card_profile_info;

/** Stores information about a specific profile of a card. Please
 * note that this structure can be extended as part of evolutionary
 * API updates at any time in any new release. \since 5.0 */
typedef struct pa_card_profile_info2 {
    const char *name;                   /**< Name of this profile */
    const char *description;            /**< Description of this profile */
    uint32_t n_sinks;                   /**< Number of sinks this profile would create */
    uint32_t n_sources;                 /**< Number of sources this profile would create */
    uint32_t priority;                  /**< The higher this value is, the more useful this profile is as a default. */
    int available;
    /**< Is this profile available? If this is zero, meaning "unavailable",
     * then it makes no sense to try to activate this profile. If this is
     * non-zero, it's still not a guarantee that activating the profile will
     * result in anything useful, it just means that the server isn't aware of
     * any reason why the profile would definitely be useless. \since 5.0 */
} pa_card_profile_info2;

/** Stores information about a specific port of a card.  Please
 * note that this structure can be extended as part of evolutionary
 * API updates at any time in any new release. \since 2.0 */
typedef struct pa_card_port_info {
    const char *name;                   /**< Name of this port */
    const char *description;            /**< Description of this port */
    uint32_t priority;                  /**< The higher this value is, the more useful this port is as a default. */
    int available;                      /**< A #pa_port_available enum, indicating availability status of this port. */
    int direction;                      /**< A #pa_direction enum, indicating the direction of this port. */
    uint32_t n_profiles;                /**< Number of entries in profile array */
    pa_card_profile_info** profiles;    /**< \deprecated Superseded by profiles2 */
    pa_proplist *proplist;              /**< Property list */
    int64_t latency_offset;             /**< Latency offset of the port that gets added to the sink/source latency when the port is active. \since 3.0 */
    pa_card_profile_info2** profiles2;  /**< Array of pointers to available profiles, or NULL. Array is terminated by an entry set to NULL. \since 5.0 */
} pa_card_port_info;

/** Stores information about cards. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release.  \since 0.9.15 */
typedef struct pa_card_info {
    uint32_t index;                      /**< Index of this card */
    const char *name;                    /**< Name of this card */
    uint32_t owner_module;               /**< Index of the owning module, or PA_INVALID_INDEX. */
    const char *driver;                  /**< Driver name */
    uint32_t n_profiles;                 /**< Number of entries in profile array */
    pa_card_profile_info* profiles;      /**< \deprecated Superseded by profiles2 */
    pa_card_profile_info* active_profile; /**< \deprecated Superseded by active_profile2 */
    pa_proplist *proplist;               /**< Property list */
    uint32_t n_ports;                    /**< Number of entries in port array */
    pa_card_port_info **ports;           /**< Array of pointers to ports, or NULL. Array is terminated by an entry set to NULL. */
    pa_card_profile_info2** profiles2;    /**< Array of pointers to available profiles, or NULL. Array is terminated by an entry set to NULL. \since 5.0 */
    pa_card_profile_info2* active_profile2; /**< Pointer to active profile in the array, or NULL. \since 5.0 */
} pa_card_info;

/** Callback prototype for pa_context_get_card_info_...() \since 0.9.15 */
typedef void (*pa_card_info_cb_t) (pa_context *c, const pa_card_info*i, int eol, void *userdata);

/** Get information about a card by its index \since 0.9.15 */
pa_operation* pa_context_get_card_info_by_index(pa_context *c, uint32_t idx, pa_card_info_cb_t cb, void *userdata);

/** Get information about a card by its name \since 0.9.15 */
pa_operation* pa_context_get_card_info_by_name(pa_context *c, const char *name, pa_card_info_cb_t cb, void *userdata);

/** Get the complete card list \since 0.9.15 */
pa_operation* pa_context_get_card_info_list(pa_context *c, pa_card_info_cb_t cb, void *userdata);

/** Change the profile of a card. \since 0.9.15 */
pa_operation* pa_context_set_card_profile_by_index(pa_context *c, uint32_t idx, const char*profile, pa_context_success_cb_t cb, void *userdata);

/** Change the profile of a card. \since 0.9.15 */
pa_operation* pa_context_set_card_profile_by_name(pa_context *c, const char*name, const char*profile, pa_context_success_cb_t cb, void *userdata);

/** Set the latency offset of a port. \since 3.0 */
pa_operation* pa_context_set_port_latency_offset(pa_context *c, const char *card_name, const char *port_name, int64_t offset, pa_context_success_cb_t cb, void *userdata);

/** @} */

/** @{ \name Sink Inputs */

/** Stores information about sink inputs. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
typedef struct pa_sink_input_info {
    uint32_t index;                      /**< Index of the sink input */
    const char *name;                    /**< Name of the sink input */
    uint32_t owner_module;               /**< Index of the module this sink input belongs to, or PA_INVALID_INDEX when it does not belong to any module. */
    uint32_t client;                     /**< Index of the client this sink input belongs to, or PA_INVALID_INDEX when it does not belong to any client. */
    uint32_t sink;                       /**< Index of the connected sink */
    pa_sample_spec sample_spec;          /**< The sample specification of the sink input. */
    pa_channel_map channel_map;          /**< Channel map */
    pa_cvolume volume;                   /**< The volume of this sink input. */
    pa_usec_t buffer_usec;               /**< Latency due to buffering in sink input, see pa_timing_info for details. */
    pa_usec_t sink_usec;                 /**< Latency of the sink device, see pa_timing_info for details. */
    const char *resample_method;         /**< The resampling method used by this sink input. */
    const char *driver;                  /**< Driver name */
    int mute;                            /**< Stream muted \since 0.9.7 */
    pa_proplist *proplist;               /**< Property list \since 0.9.11 */
    int corked;                          /**< Stream corked \since 1.0 */
    int has_volume;                      /**< Stream has volume. If not set, then the meaning of this struct's volume member is unspecified. \since 1.0 */
    int volume_writable;                 /**< The volume can be set. If not set, the volume can still change even though clients can't control the volume. \since 1.0 */
    pa_format_info *format;              /**< Stream format information. \since 1.0 */
} pa_sink_input_info;

/** Callback prototype for pa_context_get_sink_input_info() and friends */
typedef void (*pa_sink_input_info_cb_t) (pa_context *c, const pa_sink_input_info *i, int eol, void *userdata);

/** Get some information about a sink input by its index */
pa_operation* pa_context_get_sink_input_info(pa_context *c, uint32_t idx, pa_sink_input_info_cb_t cb, void *userdata);

/** Get the complete sink input list */
pa_operation* pa_context_get_sink_input_info_list(pa_context *c, pa_sink_input_info_cb_t cb, void *userdata);

/** Move the specified sink input to a different sink. \since 0.9.5 */
pa_operation* pa_context_move_sink_input_by_name(pa_context *c, uint32_t idx, const char *sink_name, pa_context_success_cb_t cb, void* userdata);

/** Move the specified sink input to a different sink. \since 0.9.5 */
pa_operation* pa_context_move_sink_input_by_index(pa_context *c, uint32_t idx, uint32_t sink_idx, pa_context_success_cb_t cb, void* userdata);

/** Set the volume of a sink input stream */
pa_operation* pa_context_set_sink_input_volume(pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);

/** Set the mute switch of a sink input stream \since 0.9.7 */
pa_operation* pa_context_set_sink_input_mute(pa_context *c, uint32_t idx, int mute, pa_context_success_cb_t cb, void *userdata);

/** Kill a sink input. */
pa_operation* pa_context_kill_sink_input(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);

/** @} */

/** @{ \name Source Outputs */

/** Stores information about source outputs. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
typedef struct pa_source_output_info {
    uint32_t index;                      /**< Index of the source output */
    const char *name;                    /**< Name of the source output */
    uint32_t owner_module;               /**< Index of the module this source output belongs to, or PA_INVALID_INDEX when it does not belong to any module. */
    uint32_t client;                     /**< Index of the client this source output belongs to, or PA_INVALID_INDEX when it does not belong to any client. */
    uint32_t source;                     /**< Index of the connected source */
    pa_sample_spec sample_spec;          /**< The sample specification of the source output */
    pa_channel_map channel_map;          /**< Channel map */
    pa_usec_t buffer_usec;               /**< Latency due to buffering in the source output, see pa_timing_info for details. */
    pa_usec_t source_usec;               /**< Latency of the source device, see pa_timing_info for details. */
    const char *resample_method;         /**< The resampling method used by this source output. */
    const char *driver;                  /**< Driver name */
    pa_proplist *proplist;               /**< Property list \since 0.9.11 */
    int corked;                          /**< Stream corked \since 1.0 */
    pa_cvolume volume;                   /**< The volume of this source output \since 1.0 */
    int mute;                            /**< Stream muted \since 1.0 */
    int has_volume;                      /**< Stream has volume. If not set, then the meaning of this struct's volume member is unspecified. \since 1.0 */
    int volume_writable;                 /**< The volume can be set. If not set, the volume can still change even though clients can't control the volume. \since 1.0 */
    pa_format_info *format;              /**< Stream format information. \since 1.0 */
} pa_source_output_info;

/** Callback prototype for pa_context_get_source_output_info() and friends */
typedef void (*pa_source_output_info_cb_t) (pa_context *c, const pa_source_output_info *i, int eol, void *userdata);

/** Get information about a source output by its index */
pa_operation* pa_context_get_source_output_info(pa_context *c, uint32_t idx, pa_source_output_info_cb_t cb, void *userdata);

/** Get the complete list of source outputs */
pa_operation* pa_context_get_source_output_info_list(pa_context *c, pa_source_output_info_cb_t cb, void *userdata);

/** Move the specified source output to a different source. \since 0.9.5 */
pa_operation* pa_context_move_source_output_by_name(pa_context *c, uint32_t idx, const char *source_name, pa_context_success_cb_t cb, void* userdata);

/** Move the specified source output to a different source. \since 0.9.5 */
pa_operation* pa_context_move_source_output_by_index(pa_context *c, uint32_t idx, uint32_t source_idx, pa_context_success_cb_t cb, void* userdata);

/** Set the volume of a source output stream \since 1.0 */
pa_operation* pa_context_set_source_output_volume(pa_context *c, uint32_t idx, const pa_cvolume *volume, pa_context_success_cb_t cb, void *userdata);

/** Set the mute switch of a source output stream \since 1.0 */
pa_operation* pa_context_set_source_output_mute(pa_context *c, uint32_t idx, int mute, pa_context_success_cb_t cb, void *userdata);

/** Kill a source output. */
pa_operation* pa_context_kill_source_output(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void *userdata);

/** @} */

/** @{ \name Statistics */

/** Memory block statistics. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
typedef struct pa_stat_info {
    uint32_t memblock_total;           /**< Currently allocated memory blocks */
    uint32_t memblock_total_size;      /**< Current total size of allocated memory blocks */
    uint32_t memblock_allocated;       /**< Allocated memory blocks during the whole lifetime of the daemon. */
    uint32_t memblock_allocated_size;  /**< Total size of all memory blocks allocated during the whole lifetime of the daemon. */
    uint32_t scache_size;              /**< Total size of all sample cache entries. */
} pa_stat_info;

/** Callback prototype for pa_context_stat() */
typedef void (*pa_stat_info_cb_t) (pa_context *c, const pa_stat_info *i, void *userdata);

/** Get daemon memory block statistics */
pa_operation* pa_context_stat(pa_context *c, pa_stat_info_cb_t cb, void *userdata);

/** @} */

/** @{ \name Cached Samples */

/** Stores information about sample cache entries. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
typedef struct pa_sample_info {
    uint32_t index;                       /**< Index of this entry */
    const char *name;                     /**< Name of this entry */
    pa_cvolume volume;                    /**< Default volume of this entry */
    pa_sample_spec sample_spec;           /**< Sample specification of the sample */
    pa_channel_map channel_map;           /**< The channel map */
    pa_usec_t duration;                   /**< Duration of this entry */
    uint32_t bytes;                       /**< Length of this sample in bytes. */
    int lazy;                             /**< Non-zero when this is a lazy cache entry. */
    const char *filename;                 /**< In case this is a lazy cache entry, the filename for the sound file to be loaded on demand. */
    pa_proplist *proplist;                /**< Property list for this sample. \since 0.9.11 */
} pa_sample_info;

/** Callback prototype for pa_context_get_sample_info_by_name() and friends */
typedef void (*pa_sample_info_cb_t)(pa_context *c, const pa_sample_info *i, int eol, void *userdata);

/** Get information about a sample by its name */
pa_operation* pa_context_get_sample_info_by_name(pa_context *c, const char *name, pa_sample_info_cb_t cb, void *userdata);

/** Get information about a sample by its index */
pa_operation* pa_context_get_sample_info_by_index(pa_context *c, uint32_t idx, pa_sample_info_cb_t cb, void *userdata);

/** Get the complete list of samples stored in the daemon. */
pa_operation* pa_context_get_sample_info_list(pa_context *c, pa_sample_info_cb_t cb, void *userdata);

/** @} */

/** \cond fulldocs */

/** @{ \name Autoload Entries */

/** \deprecated Type of an autoload entry. */
typedef enum pa_autoload_type {
    PA_AUTOLOAD_SINK = 0,
    PA_AUTOLOAD_SOURCE = 1
} pa_autoload_type_t;

/** \deprecated Stores information about autoload entries. Please note that this structure
 * can be extended as part of evolutionary API updates at any time in
 * any new release. */
typedef struct pa_autoload_info {
    uint32_t index;               /**< Index of this autoload entry */
    const char *name;             /**< Name of the sink or source */
    pa_autoload_type_t type;      /**< Type of the autoload entry */
    const char *module;           /**< Module name to load */
    const char *argument;         /**< Argument string for module */
} pa_autoload_info;

/** \deprecated Callback prototype for pa_context_get_autoload_info_by_name() and friends */
typedef void (*pa_autoload_info_cb_t)(pa_context *c, const pa_autoload_info *i, int eol, void *userdata);

/** \deprecated Get info about a specific autoload entry. */
pa_operation* pa_context_get_autoload_info_by_name(pa_context *c, const char *name, pa_autoload_type_t type, pa_autoload_info_cb_t cb, void *userdata) PA_GCC_DEPRECATED;

/** \deprecated Get info about a specific autoload entry. */
pa_operation* pa_context_get_autoload_info_by_index(pa_context *c, uint32_t idx, pa_autoload_info_cb_t cb, void *userdata) PA_GCC_DEPRECATED;

/** \deprecated Get the complete list of autoload entries. */
pa_operation* pa_context_get_autoload_info_list(pa_context *c, pa_autoload_info_cb_t cb, void *userdata) PA_GCC_DEPRECATED;

/** \deprecated Add a new autoload entry. */
pa_operation* pa_context_add_autoload(pa_context *c, const char *name, pa_autoload_type_t type, const char *module, const char*argument, pa_context_index_cb_t, void* userdata) PA_GCC_DEPRECATED;

/** \deprecated Remove an autoload entry. */
pa_operation* pa_context_remove_autoload_by_name(pa_context *c, const char *name, pa_autoload_type_t type, pa_context_success_cb_t cb, void* userdata) PA_GCC_DEPRECATED;

/** \deprecated Remove an autoload entry. */
pa_operation* pa_context_remove_autoload_by_index(pa_context *c, uint32_t idx, pa_context_success_cb_t cb, void* userdata) PA_GCC_DEPRECATED;

/** @} */

/** \endcond */

PA_C_DECL_END

#endif