5 This file is part of PulseAudio.
7 Copyright 2004-2006 Lennart Poettering
8 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
10 PulseAudio is free software; you can redistribute it and/or modify
11 it under the terms of the GNU Lesser General Public License as
12 published by the Free Software Foundation; either version 2.1 of the
13 License, or (at your option) any later version.
15 PulseAudio is distributed in the hope that it will be useful, but
16 WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 Lesser General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public
21 License along with PulseAudio; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
30 #include <pulse/cdecl.h>
31 #include <pulse/sample.h>
32 #include <pulse/version.h>
35 * Global definitions */
39 /** The state of a connection context */
40 typedef enum pa_context_state {
41 PA_CONTEXT_UNCONNECTED, /**< The context hasn't been connected yet */
42 PA_CONTEXT_CONNECTING, /**< A connection is being established */
43 PA_CONTEXT_AUTHORIZING, /**< The client is authorizing itself to the daemon */
44 PA_CONTEXT_SETTING_NAME, /**< The client is passing its application name to the daemon */
45 PA_CONTEXT_READY, /**< The connection is established, the context is ready to execute operations */
46 PA_CONTEXT_FAILED, /**< The connection failed or was disconnected */
47 PA_CONTEXT_TERMINATED /**< The connection was terminated cleanly */
50 /** Return non-zero if the passed state is one of the connected states. \since 0.9.11 */
51 static inline int PA_CONTEXT_IS_GOOD(pa_context_state_t x) {
53 x == PA_CONTEXT_CONNECTING ||
54 x == PA_CONTEXT_AUTHORIZING ||
55 x == PA_CONTEXT_SETTING_NAME ||
56 x == PA_CONTEXT_READY;
60 #define PA_CONTEXT_UNCONNECTED PA_CONTEXT_UNCONNECTED
61 #define PA_CONTEXT_CONNECTING PA_CONTEXT_CONNECTING
62 #define PA_CONTEXT_AUTHORIZING PA_CONTEXT_AUTHORIZING
63 #define PA_CONTEXT_SETTING_NAME PA_CONTEXT_SETTING_NAME
64 #define PA_CONTEXT_READY PA_CONTEXT_READY
65 #define PA_CONTEXT_FAILED PA_CONTEXT_FAILED
66 #define PA_CONTEXT_IS_GOOD PA_CONTEXT_IS_GOOD
69 /** The state of a stream */
70 typedef enum pa_stream_state {
71 PA_STREAM_UNCONNECTED, /**< The stream is not yet connected to any sink or source */
72 PA_STREAM_CREATING, /**< The stream is being created */
73 PA_STREAM_READY, /**< The stream is established, you may pass audio data to it now */
74 PA_STREAM_FAILED, /**< An error occured that made the stream invalid */
75 PA_STREAM_TERMINATED /**< The stream has been terminated cleanly */
78 /** Return non-zero if the passed state is one of the connected states. \since 0.9.11 */
79 static inline int PA_STREAM_IS_GOOD(pa_stream_state_t x) {
81 x == PA_STREAM_CREATING ||
86 #define PA_STREAM_UNCONNECTED PA_STREAM_UNCONNECTED
87 #define PA_STREAM_CREATING PA_STREAM_CREATING
88 #define PA_STREAM_READY PA_STREAM_READY
89 #define PA_STREAM_FAILED PA_STREAM_FAILED
90 #define PA_STREAM_TERMINATED PA_STREAM_TERMINATED
91 #define PA_STREAM_IS_GOOD PA_STREAM_IS_GOOD
94 /** The state of an operation */
95 typedef enum pa_operation_state {
96 PA_OPERATION_RUNNING, /**< The operation is still running */
97 PA_OPERATION_DONE, /**< The operation has been completed */
98 PA_OPERATION_CANCELED /**< The operation has been canceled */
99 } pa_operation_state_t;
101 /** \cond fulldocs */
102 #define PA_OPERATION_RUNNING PA_OPERATION_RUNNING
103 #define PA_OPERATION_DONE PA_OPERATION_DONE
104 #define PA_OPERATION_CANCELED PA_OPERATION_CANCELED
107 /** An invalid index */
108 #define PA_INVALID_INDEX ((uint32_t) -1)
110 /** Some special flags for contexts. */
111 typedef enum pa_context_flags {
112 PA_CONTEXT_NOAUTOSPAWN = 1
113 /**< Disabled autospawning of the PulseAudio daemon if required */
114 } pa_context_flags_t;
116 /** \cond fulldocs */
117 /* Allow clients to check with #ifdef for those flags */
118 #define PA_CONTEXT_NOAUTOSPAWN PA_CONTEXT_NOAUTOSPAWN
121 /** The direction of a pa_stream object */
122 typedef enum pa_stream_direction {
123 PA_STREAM_NODIRECTION, /**< Invalid direction */
124 PA_STREAM_PLAYBACK, /**< Playback stream */
125 PA_STREAM_RECORD, /**< Record stream */
126 PA_STREAM_UPLOAD /**< Sample upload stream */
127 } pa_stream_direction_t;
129 /** \cond fulldocs */
130 #define PA_STREAM_NODIRECTION PA_STREAM_NODIRECTION
131 #define PA_STREAM_PLAYBACK PA_STREAM_PLAYBACK
132 #define PA_STREAM_RECORD PA_STREAM_RECORD
133 #define PA_STREAM_UPLOAD PA_STREAM_UPLOAD
136 /** Some special flags for stream connections. */
137 typedef enum pa_stream_flags {
139 PA_STREAM_START_CORKED = 0x0001U,
140 /**< Create the stream corked, requiring an explicit
141 * pa_stream_cork() call to uncork it. */
143 PA_STREAM_INTERPOLATE_TIMING = 0x0002U,
144 /**< Interpolate the latency for this stream. When enabled,
145 * pa_stream_get_latency() and pa_stream_get_time() will try to
146 * estimate the current record/playback time based on the local
147 * time that passed since the last timing info update. Using this
148 * option has the advantage of not requiring a whole roundtrip
149 * when the current playback/recording time is needed. Consider
150 * using this option when requesting latency information
151 * frequently. This is especially useful on long latency network
152 * connections. It makes a lot of sense to combine this option
153 * with PA_STREAM_AUTO_TIMING_UPDATE. */
155 PA_STREAM_NOT_MONOTONIC = 0x0004U,
156 /**< Don't force the time to increase monotonically. If this
157 * option is enabled, pa_stream_get_time() will not necessarily
158 * return always monotonically increasing time values on each
159 * call. This may confuse applications which cannot deal with time
160 * going 'backwards', but has the advantage that bad transport
161 * latency estimations that caused the time to to jump ahead can
162 * be corrected quickly, without the need to wait. (Please note
163 * that this flag was named PA_STREAM_NOT_MONOTONOUS in releases
164 * prior to 0.9.11. The old name is still defined too, for
165 * compatibility reasons. */
167 PA_STREAM_AUTO_TIMING_UPDATE = 0x0008U,
168 /**< If set timing update requests are issued periodically
169 * automatically. Combined with PA_STREAM_INTERPOLATE_TIMING you
170 * will be able to query the current time and latency with
171 * pa_stream_get_time() and pa_stream_get_latency() at all times
172 * without a packet round trip.*/
174 PA_STREAM_NO_REMAP_CHANNELS = 0x0010U,
175 /**< Don't remap channels by their name, instead map them simply
176 * by their index. Implies PA_STREAM_NO_REMIX_CHANNELS. Only
177 * supported when the server is at least PA 0.9.8. It is ignored
178 * on older servers.\since 0.9.8 */
180 PA_STREAM_NO_REMIX_CHANNELS = 0x0020U,
181 /**< When remapping channels by name, don't upmix or downmix them
182 * to related channels. Copy them into matching channels of the
183 * device 1:1. Only supported when the server is at least PA
184 * 0.9.8. It is ignored on older servers. \since 0.9.8 */
186 PA_STREAM_FIX_FORMAT = 0x0040U,
187 /**< Use the sample format of the sink/device this stream is being
188 * connected to, and possibly ignore the format the sample spec
189 * contains -- but you still have to pass a valid value in it as a
190 * hint to PulseAudio what would suit your stream best. If this is
191 * used you should query the used sample format after creating the
192 * stream by using pa_stream_get_sample_spec(). Also, if you
193 * specified manual buffer metrics it is recommended to update
194 * them with pa_stream_set_buffer_attr() to compensate for the
195 * changed frame sizes. Only supported when the server is at least
196 * PA 0.9.8. It is ignored on older servers. \since 0.9.8 */
198 PA_STREAM_FIX_RATE = 0x0080U,
199 /**< Use the sample rate of the sink, and possibly ignore the rate
200 * the sample spec contains. Usage similar to
201 * PA_STREAM_FIX_FORMAT.Only supported when the server is at least
202 * PA 0.9.8. It is ignored on older servers. \since 0.9.8 */
204 PA_STREAM_FIX_CHANNELS = 0x0100,
205 /**< Use the number of channels and the channel map of the sink,
206 * and possibly ignore the number of channels and the map the
207 * sample spec and the passed channel map contains. Usage similar
208 * to PA_STREAM_FIX_FORMAT. Only supported when the server is at
209 * least PA 0.9.8. It is ignored on older servers. \since 0.9.8 */
211 PA_STREAM_DONT_MOVE = 0x0200U,
212 /**< Don't allow moving of this stream to another
213 * sink/device. Useful if you use any of the PA_STREAM_FIX_ flags
214 * and want to make sure that resampling never takes place --
215 * which might happen if the stream is moved to another
216 * sink/source whith a different sample spec/channel map. Only
217 * supported when the server is at least PA 0.9.8. It is ignored
218 * on older servers. \since 0.9.8 */
220 PA_STREAM_VARIABLE_RATE = 0x0400U,
221 /**< Allow dynamic changing of the sampling rate during playback
222 * with pa_stream_update_sample_rate(). Only supported when the
223 * server is at least PA 0.9.8. It is ignored on older
224 * servers. \since 0.9.8 */
226 PA_STREAM_PEAK_DETECT = 0x0800U,
227 /**< Find peaks instead of resampling. \since 0.9.11 */
229 PA_STREAM_START_MUTED = 0x1000U,
230 /**< Create in muted state. If neither PA_STREAM_START_UNMUTED nor
231 * PA_STREAM_START_MUTED it is left to the server to decide
232 * whether to create the stream in muted or in unmuted
233 * state. \since 0.9.11 */
235 PA_STREAM_ADJUST_LATENCY = 0x2000U,
236 /**< Try to adjust the latency of the sink/source based on the
237 * requested buffer metrics and adjust buffer metrics
238 * accordingly. Also see pa_buffer_attr. This option may not be
239 * specified at the same time as PA_STREAM_EARLY_REQUESTS. \since
242 PA_STREAM_EARLY_REQUESTS = 0x4000U,
243 /**< Enable compatibility mode for legacy clients that rely on a
244 * "classic" hardware device fragment-style playback model. If
245 * this option is set, the minreq value of the buffer metrics gets
246 * a new meaning: instead of just specifying that no requests
247 * asking for less new data than this value will be made to the
248 * client it will also guarantee that requests are generated as
249 * early as this limit is reached. This flag should only be set in
250 * very few situations where compatiblity with a fragment-based
251 * playback model needs to be kept and the client applications
252 * cannot deal with data requests that are delayed to the latest
253 * moment possible. (Usually these are programs that use usleep()
254 * or a similar call in their playback loops instead of sleeping
255 * on the device itself.) Also see pa_buffer_attr. This option may
256 * not be specified at the same time as
257 * PA_STREAM_ADJUST_LATENCY. \since 0.9.12 */
259 PA_STREAM_DONT_INHIBIT_AUTO_SUSPEND = 0x8000U,
260 /**< If set this stream won't be taken into account when we it is
261 * checked whether the device this stream is connected to should
262 * auto-suspend. \since 0.9.15 */
264 PA_STREAM_START_UNMUTED = 0x10000U,
265 /**< Create in unmuted state. If neither PA_STREAM_START_UNMUTED
266 * nor PA_STREAM_START_MUTED it is left to the server to decide
267 * whether to create the stream in muted or in unmuted
268 * state. \since 0.9.15 */
270 PA_STREAM_FAIL_ON_SUSPEND = 0x20000U
271 /**< If the sink/source this stream is connected to is suspended
272 * during the creation of this stream, cause it to fail. If the
273 * sink/source is being suspended during creation of this stream,
274 * make sure this stream is terminated. \since 0.9.15 */
277 /** \cond fulldocs */
279 /* English is an evil language */
280 #define PA_STREAM_NOT_MONOTONOUS PA_STREAM_NOT_MONOTONIC
282 /* Allow clients to check with #ifdef for those flags */
283 #define PA_STREAM_START_CORKED PA_STREAM_START_CORKED
284 #define PA_STREAM_INTERPOLATE_TIMING PA_STREAM_INTERPOLATE_TIMING
285 #define PA_STREAM_NOT_MONOTONIC PA_STREAM_NOT_MONOTONIC
286 #define PA_STREAM_AUTO_TIMING_UPDATE PA_STREAM_AUTO_TIMING_UPDATE
287 #define PA_STREAM_NO_REMAP_CHANNELS PA_STREAM_NO_REMAP_CHANNELS
288 #define PA_STREAM_NO_REMIX_CHANNELS PA_STREAM_NO_REMIX_CHANNELS
289 #define PA_STREAM_FIX_FORMAT PA_STREAM_FIX_FORMAT
290 #define PA_STREAM_FIX_RATE PA_STREAM_FIX_RATE
291 #define PA_STREAM_FIX_CHANNELS PA_STREAM_FIX_CHANNELS
292 #define PA_STREAM_DONT_MOVE PA_STREAM_DONT_MOVE
293 #define PA_STREAM_VARIABLE_RATE PA_STREAM_VARIABLE_RATE
294 #define PA_STREAM_PEAK_DETECT PA_STREAM_PEAK_DETECT
295 #define PA_STREAM_START_MUTED PA_STREAM_START_MUTED
296 #define PA_STREAM_ADJUST_LATENCY PA_STREAM_ADJUST_LATENCY
297 #define PA_STREAM_EARLY_REQUESTS PA_STREAM_EARLY_REQUESTS
298 #define PA_STREAM_DONT_INHIBIT_AUTO_SUSPEND PA_STREAM_DONT_INHIBIT_AUTO_SUSPEND
299 #define PA_STREAM_START_UNMUTED PA_STREAM_START_UNMUTED
300 #define PA_STREAM_FAIL_ON_SUSPEND PA_STREAM_FAIL_ON_SUSPEND
304 /** Playback and record buffer metrics */
305 typedef struct pa_buffer_attr {
307 /**< Maximum length of the buffer. Setting this to (uint32_t) -1
308 * will initialize this to the maximum value supported by server,
309 * which is recommended. */
312 /**< Playback only: target length of the buffer. The server tries
313 * to assure that at least tlength bytes are always available in
314 * the per-stream server-side playback buffer. It is recommended
315 * to set this to (uint32_t) -1, which will initialize this to a
316 * value that is deemed sensible by the server. However, this
317 * value will default to something like 2s, i.e. for applications
318 * that have specific latency requirements this value should be
319 * set to the maximum latency that the application can deal
320 * with. When PA_STREAM_ADJUST_LATENCY is not set this value will
321 * influence only the per-stream playback buffer size. When
322 * PA_STREAM_ADJUST_LATENCY is set the overall latency of the sink
323 * plus the playback buffer size is configured to this value. Set
324 * PA_STREAM_ADJUST_LATENCY if you are interested in adjusting the
325 * overall latency. Don't set it if you are interested in
326 * configuring the server-sider per-stream playback buffer
330 /**< Playback only: pre-buffering. The server does not start with
331 * playback before at least prebug bytes are available in the
332 * buffer. It is recommended to set this to (uint32_t) -1, which
333 * will initialize this to the same value as tlength, whatever
334 * that may be. Initialize to 0 to enable manual start/stop
335 * control of the stream. This means that playback will not stop
336 * on underrun and playback will not start automatically. Instead
337 * pa_stream_corked() needs to be called explicitly. If you set
338 * this value to 0 you should also set PA_STREAM_START_CORKED. */
341 /**< Playback only: minimum request. The server does not request
342 * less than minreq bytes from the client, instead waits until the
343 * buffer is free enough to request more bytes at once. It is
344 * recommended to set this to (uint32_t) -1, which will initialize
345 * this to a value that is deemed sensible by the server. This
346 * should be set to a value that gives PulseAudio enough time to
347 * move the data from the per-stream playback buffer into the
348 * hardware playback buffer. */
351 /**< Recording only: fragment size. The server sends data in
352 * blocks of fragsize bytes size. Large values deminish
353 * interactivity with other operations on the connection context
354 * but decrease control overhead. It is recommended to set this to
355 * (uint32_t) -1, which will initialize this to a value that is
356 * deemed sensible by the server. However, this value will default
357 * to something like 2s, i.e. for applications that have specific
358 * latency requirements this value should be set to the maximum
359 * latency that the application can deal with. If
360 * PA_STREAM_ADJUST_LATENCY is set the overall source latency will
361 * be adjusted according to this value. If it is not set the
362 * source latency is left unmodified. */
366 /** Error values as used by pa_context_errno(). Use pa_strerror() to convert these values to human readable strings */
368 PA_OK = 0, /**< No error */
369 PA_ERR_ACCESS, /**< Access failure */
370 PA_ERR_COMMAND, /**< Unknown command */
371 PA_ERR_INVALID, /**< Invalid argument */
372 PA_ERR_EXIST, /**< Entity exists */
373 PA_ERR_NOENTITY, /**< No such entity */
374 PA_ERR_CONNECTIONREFUSED, /**< Connection refused */
375 PA_ERR_PROTOCOL, /**< Protocol error */
376 PA_ERR_TIMEOUT, /**< Timeout */
377 PA_ERR_AUTHKEY, /**< No authorization key */
378 PA_ERR_INTERNAL, /**< Internal error */
379 PA_ERR_CONNECTIONTERMINATED, /**< Connection terminated */
380 PA_ERR_KILLED, /**< Entity killed */
381 PA_ERR_INVALIDSERVER, /**< Invalid server */
382 PA_ERR_MODINITFAILED, /**< Module initialization failed */
383 PA_ERR_BADSTATE, /**< Bad state */
384 PA_ERR_NODATA, /**< No data */
385 PA_ERR_VERSION, /**< Incompatible protocol version */
386 PA_ERR_TOOLARGE, /**< Data too large */
387 PA_ERR_NOTSUPPORTED, /**< Operation not supported \since 0.9.5 */
388 PA_ERR_UNKNOWN, /**< The error code was unknown to the client */
389 PA_ERR_NOEXTENSION, /**< Extension does not exist. \since 0.9.12 */
390 PA_ERR_OBSOLETE, /**< Obsolete functionality. \since 0.9.15 */
391 PA_ERR_NOTIMPLEMENTED, /**< Missing implementation. \since 0.9.15 */
392 PA_ERR_FORKED, /**< The caler forked without calling execve() and tried to reuse the context. \since 0.9.15 */
393 PA_ERR_MAX /**< Not really an error but the first invalid error code */
396 /** \cond fulldocs */
398 #define PA_ERR_ACCESS PA_ERR_ACCESS
399 #define PA_ERR_COMMAND PA_ERR_COMMAND
400 #define PA_ERR_INVALID PA_ERR_INVALID
401 #define PA_ERR_EXIST PA_ERR_EXIST
402 #define PA_ERR_NOENTITY PA_ERR_NOENTITY
403 #define PA_ERR_CONNECTIONREFUSED PA_ERR_CONNECTIONREFUSED
404 #define PA_ERR_PROTOCOL PA_ERR_PROTOCOL
405 #define PA_ERR_TIMEOUT PA_ERR_TIMEOUT
406 #define PA_ERR_AUTHKEY PA_ERR_AUTHKEY
407 #define PA_ERR_INTERNAL PA_ERR_INTERNAL
408 #define PA_ERR_CONNECTIONTERMINATED PA_ERR_CONNECTIONTERMINATED
409 #define PA_ERR_KILLED PA_ERR_KILLED
410 #define PA_ERR_INVALIDSERVER PA_ERR_INVALIDSERVER
411 #define PA_ERR_MODINITFAILED PA_ERR_MODINITFAILED
412 #define PA_ERR_BADSTATE PA_ERR_BADSTATE
413 #define PA_ERR_NODATA PA_ERR_NODATA
414 #define PA_ERR_VERSION PA_ERR_VERSION
415 #define PA_ERR_TOOLARGE PA_ERR_TOOLARGE
416 #define PA_ERR_NOTSUPPORTED PA_ERR_NOTSUPPORTED
417 #define PA_ERR_UNKNOWN PA_ERR_UNKNOWN
418 #define PA_ERR_NOEXTENSION PA_ERR_NOEXTENSION
419 #define PA_ERR_OBSOLETE PA_ERR_OBSOLETE
420 #define PA_ERR_NOTIMPLEMENTED PA_ERR_NOTIMPLEMENTED
421 #define PA_ERR_FORKED PA_ERR_FORKED
422 #define PA_ERR_MAX PA_ERR_MAX
425 /** Subscription event mask, as used by pa_context_subscribe() */
426 typedef enum pa_subscription_mask {
427 PA_SUBSCRIPTION_MASK_NULL = 0x0000U,
430 PA_SUBSCRIPTION_MASK_SINK = 0x0001U,
433 PA_SUBSCRIPTION_MASK_SOURCE = 0x0002U,
434 /**< Source events */
436 PA_SUBSCRIPTION_MASK_SINK_INPUT = 0x0004U,
437 /**< Sink input events */
439 PA_SUBSCRIPTION_MASK_SOURCE_OUTPUT = 0x0008U,
440 /**< Source output events */
442 PA_SUBSCRIPTION_MASK_MODULE = 0x0010U,
443 /**< Module events */
445 PA_SUBSCRIPTION_MASK_CLIENT = 0x0020U,
446 /**< Client events */
448 PA_SUBSCRIPTION_MASK_SAMPLE_CACHE = 0x0040U,
449 /**< Sample cache events */
451 PA_SUBSCRIPTION_MASK_SERVER = 0x0080U,
452 /**< Other global server changes. */
454 /** \cond fulldocs */
455 PA_SUBSCRIPTION_MASK_AUTOLOAD = 0x0100U,
456 /**< \deprecated Autoload table events. */
459 PA_SUBSCRIPTION_MASK_CARD = 0x0200U,
460 /**< Card events. \since 0.9.15 */
462 PA_SUBSCRIPTION_MASK_ALL = 0x02ffU
463 /**< Catch all events */
464 } pa_subscription_mask_t;
466 /** Subscription event types, as used by pa_context_subscribe() */
467 typedef enum pa_subscription_event_type {
468 PA_SUBSCRIPTION_EVENT_SINK = 0x0000U,
469 /**< Event type: Sink */
471 PA_SUBSCRIPTION_EVENT_SOURCE = 0x0001U,
472 /**< Event type: Source */
474 PA_SUBSCRIPTION_EVENT_SINK_INPUT = 0x0002U,
475 /**< Event type: Sink input */
477 PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT = 0x0003U,
478 /**< Event type: Source output */
480 PA_SUBSCRIPTION_EVENT_MODULE = 0x0004U,
481 /**< Event type: Module */
483 PA_SUBSCRIPTION_EVENT_CLIENT = 0x0005U,
484 /**< Event type: Client */
486 PA_SUBSCRIPTION_EVENT_SAMPLE_CACHE = 0x0006U,
487 /**< Event type: Sample cache item */
489 PA_SUBSCRIPTION_EVENT_SERVER = 0x0007U,
490 /**< Event type: Global server change, only occuring with PA_SUBSCRIPTION_EVENT_CHANGE. */
492 /** \cond fulldocs */
493 PA_SUBSCRIPTION_EVENT_AUTOLOAD = 0x0008U,
494 /**< \deprecated Event type: Autoload table changes. */
497 PA_SUBSCRIPTION_EVENT_CARD = 0x0009U,
498 /**< Event type: Card \since 0.9.15 */
500 PA_SUBSCRIPTION_EVENT_FACILITY_MASK = 0x000FU,
501 /**< A mask to extract the event type from an event value */
503 PA_SUBSCRIPTION_EVENT_NEW = 0x0000U,
504 /**< A new object was created */
506 PA_SUBSCRIPTION_EVENT_CHANGE = 0x0010U,
507 /**< A property of the object was modified */
509 PA_SUBSCRIPTION_EVENT_REMOVE = 0x0020U,
510 /**< An object was removed */
512 PA_SUBSCRIPTION_EVENT_TYPE_MASK = 0x0030U
513 /**< A mask to extract the event operation from an event value */
515 } pa_subscription_event_type_t;
517 /** Return one if an event type t matches an event mask bitfield */
518 #define pa_subscription_match_flags(m, t) (!!((m) & (1 << ((t) & PA_SUBSCRIPTION_EVENT_FACILITY_MASK))))
520 /** \cond fulldocs */
521 #define PA_SUBSCRIPTION_MASK_NULL PA_SUBSCRIPTION_MASK_NULL
522 #define PA_SUBSCRIPTION_MASK_SINK PA_SUBSCRIPTION_MASK_SINK
523 #define PA_SUBSCRIPTION_MASK_SOURCE PA_SUBSCRIPTION_MASK_SOURCE
524 #define PA_SUBSCRIPTION_MASK_SINK_INPUT PA_SUBSCRIPTION_MASK_SINK_INPUT
525 #define PA_SUBSCRIPTION_MASK_SOURCE_OUTPUT PA_SUBSCRIPTION_MASK_SOURCE_OUTPUT
526 #define PA_SUBSCRIPTION_MASK_MODULE PA_SUBSCRIPTION_MASK_MODULE
527 #define PA_SUBSCRIPTION_MASK_CLIENT PA_SUBSCRIPTION_MASK_CLIENT
528 #define PA_SUBSCRIPTION_MASK_SAMPLE_CACHE PA_SUBSCRIPTION_MASK_SAMPLE_CACHE
529 #define PA_SUBSCRIPTION_MASK_SERVER PA_SUBSCRIPTION_MASK_SERVER
530 #define PA_SUBSCRIPTION_MASK_AUTOLOAD PA_SUBSCRIPTION_MASK_AUTOLOAD
531 #define PA_SUBSCRIPTION_MASK_CARD PA_SUBSCRIPTION_MASK_CARD
532 #define PA_SUBSCRIPTION_MASK_ALL PA_SUBSCRIPTION_MASK_ALL
533 #define PA_SUBSCRIPTION_EVENT_SINK PA_SUBSCRIPTION_EVENT_SINK
534 #define PA_SUBSCRIPTION_EVENT_SOURCE PA_SUBSCRIPTION_EVENT_SOURCE
535 #define PA_SUBSCRIPTION_EVENT_SINK_INPUT PA_SUBSCRIPTION_EVENT_SINK_INPUT
536 #define PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT PA_SUBSCRIPTION_EVENT_SOURCE_OUTPUT
537 #define PA_SUBSCRIPTION_EVENT_MODULE PA_SUBSCRIPTION_EVENT_MODULE
538 #define PA_SUBSCRIPTION_EVENT_CLIENT PA_SUBSCRIPTION_EVENT_CLIENT
539 #define PA_SUBSCRIPTION_EVENT_SAMPLE_CACHE PA_SUBSCRIPTION_EVENT_SAMPLE_CACHE
540 #define PA_SUBSCRIPTION_EVENT_SERVER PA_SUBSCRIPTION_EVENT_SERVER
541 #define PA_SUBSCRIPTION_EVENT_AUTOLOAD PA_SUBSCRIPTION_EVENT_AUTOLOAD
542 #define PA_SUBSCRIPTION_EVENT_CARD PA_SUBSCRIPTION_EVENT_CARD
543 #define PA_SUBSCRIPTION_EVENT_FACILITY_MASK PA_SUBSCRIPTION_EVENT_FACILITY_MASK
544 #define PA_SUBSCRIPTION_EVENT_NEW PA_SUBSCRIPTION_EVENT_NEW
545 #define PA_SUBSCRIPTION_EVENT_CHANGE PA_SUBSCRIPTION_EVENT_CHANGE
546 #define PA_SUBSCRIPTION_EVENT_REMOVE PA_SUBSCRIPTION_EVENT_REMOVE
547 #define PA_SUBSCRIPTION_EVENT_TYPE_MASK PA_SUBSCRIPTION_EVENT_TYPE_MASK
550 /** A structure for all kinds of timing information of a stream. See
551 * pa_stream_update_timing_info() and pa_stream_get_timing_info(). The
552 * total output latency a sample that is written with
553 * pa_stream_write() takes to be played may be estimated by
554 * sink_usec+buffer_usec+transport_usec. (where buffer_usec is defined
555 * as pa_bytes_to_usec(write_index-read_index)) The output buffer
556 * which buffer_usec relates to may be manipulated freely (with
557 * pa_stream_write()'s seek argument, pa_stream_flush() and friends),
558 * the buffers sink_usec and source_usec relate to are first-in
559 * first-out (FIFO) buffers which cannot be flushed or manipulated in
560 * any way. The total input latency a sample that is recorded takes to
561 * be delivered to the application is:
562 * source_usec+buffer_usec+transport_usec-sink_usec. (Take care of
563 * sign issues!) When connected to a monitor source sink_usec contains
564 * the latency of the owning sink. The two latency estimations
565 * described here are implemented in pa_stream_get_latency(). Please
566 * note that this structure can be extended as part of evolutionary
567 * API updates at any time in any new release.*/
568 typedef struct pa_timing_info {
569 struct timeval timestamp;
570 /**< The time when this timing info structure was current */
572 int synchronized_clocks;
573 /**< Non-zero if the local and the remote machine have
574 * synchronized clocks. If synchronized clocks are detected
575 * transport_usec becomes much more reliable. However, the code
576 * that detects synchronized clocks is very limited und unreliable
580 /**< Time in usecs a sample takes to be played on the sink. For
581 * playback streams and record streams connected to a monitor
584 pa_usec_t source_usec;
585 /**< Time in usecs a sample takes from being recorded to being
586 * delivered to the application. Only for record streams. */
588 pa_usec_t transport_usec;
589 /**< Estimated time in usecs a sample takes to be transferred
590 * to/from the daemon. For both playback and record streams. */
593 /**< Non-zero when the stream is currently not underrun and data
594 * is being passed on to the device. Only for playback
595 * streams. This field does not say whether the data is actually
596 * already being played. To determine this check whether
597 * since_underrun (converted to usec) is larger than sink_usec.*/
599 int write_index_corrupt;
600 /**< Non-zero if write_index is not up-to-date because a local
601 * write command that corrupted it has been issued in the time
602 * since this latency info was current . Only write commands with
603 * SEEK_RELATIVE_ON_READ and SEEK_RELATIVE_END can corrupt
607 /**< Current write index into the playback buffer in bytes. Think
608 * twice before using this for seeking purposes: it might be out
609 * of date a the time you want to use it. Consider using
610 * PA_SEEK_RELATIVE instead. */
612 int read_index_corrupt;
613 /**< Non-zero if read_index is not up-to-date because a local
614 * pause or flush request that corrupted it has been issued in the
615 * time since this latency info was current. */
618 /**< Current read index into the playback buffer in bytes. Think
619 * twice before using this for seeking purposes: it might be out
620 * of date a the time you want to use it. Consider using
621 * PA_SEEK_RELATIVE_ON_READ instead. */
623 pa_usec_t configured_sink_usec;
624 /**< The configured latency for the sink. \since 0.9.11 */
626 pa_usec_t configured_source_usec;
627 /**< The configured latency for the source. \since 0.9.11 */
629 int64_t since_underrun;
630 /**< Bytes that were handed to the sink since the last underrun
631 * happened, or since playback started again after the last
632 * underrun. playing will tell you which case it is. \since
637 /** A structure for the spawn api. This may be used to integrate auto
638 * spawned daemons into your application. For more information see
639 * pa_context_connect(). When spawning a new child process the
640 * waitpid() is used on the child's PID. The spawn routine will not
641 * block or ignore SIGCHLD signals, since this cannot be done in a
642 * thread compatible way. You might have to do this in
643 * prefork/postfork. */
644 typedef struct pa_spawn_api {
645 void (*prefork)(void);
646 /**< Is called just before the fork in the parent process. May be
649 void (*postfork)(void);
650 /**< Is called immediately after the fork in the parent
651 * process. May be NULL.*/
653 void (*atfork)(void);
654 /**< Is called immediately after the fork in the child
655 * process. May be NULL. It is not safe to close all file
656 * descriptors in this function unconditionally, since a UNIX
657 * socket (created using socketpair()) is passed to the new
661 /** Seek type for pa_stream_write(). */
662 typedef enum pa_seek_mode {
663 PA_SEEK_RELATIVE = 0,
664 /**< Seek relatively to the write index */
666 PA_SEEK_ABSOLUTE = 1,
667 /**< Seek relatively to the start of the buffer queue */
669 PA_SEEK_RELATIVE_ON_READ = 2,
670 /**< Seek relatively to the read index. */
672 PA_SEEK_RELATIVE_END = 3
673 /**< Seek relatively to the current end of the buffer queue. */
676 /** \cond fulldocs */
677 #define PA_SEEK_RELATIVE PA_SEEK_RELATIVE
678 #define PA_SEEK_ABSOLUTE PA_SEEK_ABSOLUTE
679 #define PA_SEEK_RELATIVE_ON_READ PA_SEEK_RELATIVE_ON_READ
680 #define PA_SEEK_RELATIVE_END PA_SEEK_RELATIVE_END
683 /** Special sink flags. */
684 typedef enum pa_sink_flags {
685 PA_SINK_HW_VOLUME_CTRL = 0x0001U,
686 /**< Supports hardware volume control */
688 PA_SINK_LATENCY = 0x0002U,
689 /**< Supports latency querying */
691 PA_SINK_HARDWARE = 0x0004U,
692 /**< Is a hardware sink of some kind, in contrast to
693 * "virtual"/software sinks \since 0.9.3 */
695 PA_SINK_NETWORK = 0x0008U,
696 /**< Is a networked sink of some kind. \since 0.9.7 */
698 PA_SINK_HW_MUTE_CTRL = 0x0010U,
699 /**< Supports hardware mute control \since 0.9.11 */
701 PA_SINK_DECIBEL_VOLUME = 0x0020U,
702 /**< Volume can be translated to dB with pa_sw_volume_to_dB()
705 PA_SINK_FLAT_VOLUME = 0x0040U,
706 /**< This sink is in flat volume mode, i.e. always the maximum of
707 * the volume of all connected inputs. \since 0.9.15 */
709 PA_SINK_DYNAMIC_LATENCY = 0x0080U
710 /**< The latency can be adjusted dynamically depending on the
711 * needs of the connected streams. \since 0.9.15 */
714 /** \cond fulldocs */
715 #define PA_SINK_HW_VOLUME_CTRL PA_SINK_HW_VOLUME_CTRL
716 #define PA_SINK_LATENCY PA_SINK_LATENCY
717 #define PA_SINK_HARDWARE PA_SINK_HARDWARE
718 #define PA_SINK_NETWORK PA_SINK_NETWORK
719 #define PA_SINK_HW_MUTE_CTRL PA_SINK_HW_MUTE_CTRL
720 #define PA_SINK_DECIBEL_VOLUME PA_SINK_DECIBEL_VOLUME
721 #define PA_SINK_FLAT_VOLUME PA_SINK_FLAT_VOLUME
722 #define PA_SINK_DYNAMIC_LATENCY PA_SINK_DYNAMIC_LATENCY
725 /** Sink state. \since 0.9.15 */
726 typedef enum pa_sink_state { /* enum serialized in u8 */
727 PA_SINK_INVALID_STATE = -1,
728 /**< This state is used when the server does not support sink state introspection \since 0.9.15 */
731 /**< Running, sink is playing and used by at least one non-corked sink-input \since 0.9.15 */
734 /**< When idle, the sink is playing but there is no non-corked sink-input attached to it \since 0.9.15 */
736 PA_SINK_SUSPENDED = 2,
737 /**< When suspended, actual sink access can be closed, for instance \since 0.9.15 */
739 /** \cond fulldocs */
740 /* PRIVATE: Server-side values -- DO NOT USE THIS ON THE CLIENT
741 * SIDE! These values are *not* considered part of the official PA
742 * API/ABI. If you use them your application might break when PA
743 * is upgraded. Also, please note that these values are not useful
744 * on the client side anyway. */
747 /**< Initialization state */
749 PA_SINK_UNLINKED = -3
750 /**< The state when the sink is getting unregistered and removed from client access */
755 /** Returns non-zero if sink is playing: running or idle. \since 0.9.15 */
756 static inline int PA_SINK_IS_OPENED(pa_sink_state_t x) {
757 return x == PA_SINK_RUNNING || x == PA_SINK_IDLE;
760 /** \cond fulldocs */
761 #define PA_SINK_INVALID_STATE PA_SINK_INVALID_STATE
762 #define PA_SINK_RUNNING PA_SINK_RUNNING
763 #define PA_SINK_IDLE PA_SINK_IDLE
764 #define PA_SINK_SUSPENDED PA_SINK_SUSPENDED
765 #define PA_SINK_INIT PA_SINK_INIT
766 #define PA_SINK_UNLINKED PA_SINK_UNLINKED
767 #define PA_SINK_IS_OPENED PA_SINK_IS_OPENED
770 /** Special source flags. */
771 typedef enum pa_source_flags {
772 PA_SOURCE_HW_VOLUME_CTRL = 0x0001U,
773 /**< Supports hardware volume control */
775 PA_SOURCE_LATENCY = 0x0002U,
776 /**< Supports latency querying */
778 PA_SOURCE_HARDWARE = 0x0004U,
779 /**< Is a hardware source of some kind, in contrast to
780 * "virtual"/software source \since 0.9.3 */
782 PA_SOURCE_NETWORK = 0x0008U,
783 /**< Is a networked source of some kind. \since 0.9.7 */
785 PA_SOURCE_HW_MUTE_CTRL = 0x0010U,
786 /**< Supports hardware mute control \since 0.9.11 */
788 PA_SOURCE_DECIBEL_VOLUME = 0x0020U,
789 /**< Volume can be translated to dB with pa_sw_volume_to_dB()
792 PA_SOURCE_DYNAMIC_LATENCY = 0x0040U
793 /**< The latency can be adjusted dynamically depending on the
794 * needs of the connected streams. \since 0.9.15 */
797 /** \cond fulldocs */
798 #define PA_SOURCE_HW_VOLUME_CTRL PA_SOURCE_HW_VOLUME_CTRL
799 #define PA_SOURCE_LATENCY PA_SOURCE_LATENCY
800 #define PA_SOURCE_HARDWARE PA_SOURCE_HARDWARE
801 #define PA_SOURCE_NETWORK PA_SOURCE_NETWORK
802 #define PA_SOURCE_HW_MUTE_CTRL PA_SOURCE_HW_MUTE_CTRL
803 #define PA_SOURCE_DECIBEL_VOLUME PA_SOURCE_DECIBEL_VOLUME
804 #define PA_SOURCE_DYNAMIC_LATENCY PA_SOURCE_DYNAMIC_LATENCY
807 /** Source state. \since 0.9.15 */
808 typedef enum pa_source_state {
809 PA_SOURCE_INVALID_STATE = -1,
810 /**< This state is used when the server does not support source state introspection \since 0.9.15 */
812 PA_SOURCE_RUNNING = 0,
813 /**< Running, source is recording and used by at least one non-corked source-output \since 0.9.15 */
816 /**< When idle, the source is still recording but there is no non-corked source-output \since 0.9.15 */
818 PA_SOURCE_SUSPENDED = 2,
819 /**< When suspended, actual source access can be closed, for instance \since 0.9.15 */
821 /** \cond fulldocs */
822 /* PRIVATE: Server-side values -- DO NOT USE THIS ON THE CLIENT
823 * SIDE! These values are *not* considered part of the official PA
824 * API/ABI. If you use them your application might break when PA
825 * is upgraded. Also, please note that these values are not useful
826 * on the client side anyway. */
829 /**< Initialization state */
831 PA_SOURCE_UNLINKED = -3
832 /**< The state when the source is getting unregistered and removed from client access */
837 /** Returns non-zero if source is recording: running or idle. \since 0.9.15 */
838 static inline int PA_SOURCE_IS_OPENED(pa_source_state_t x) {
839 return x == PA_SOURCE_RUNNING || x == PA_SOURCE_IDLE;
842 /** \cond fulldocs */
843 #define PA_SOURCE_INVALID_STATE PA_SOURCE_INVALID_STATE
844 #define PA_SOURCE_RUNNING PA_SOURCE_RUNNING
845 #define PA_SOURCE_IDLE PA_SOURCE_IDLE
846 #define PA_SOURCE_SUSPENDED PA_SOURCE_SUSPENDED
847 #define PA_SOURCE_INIT PA_SOURCE_INIT
848 #define PA_SOURCE_UNLINKED PA_SOURCE_UNLINKED
849 #define PA_SOURCE_IS_OPENED PA_SOURCE_IS_OPENED
852 /** A generic free() like callback prototype */
853 typedef void (*pa_free_cb_t)(void *p);
855 /** A stream policy/meta event requesting that an application should
856 * cork a specific stream. See pa_stream_event_cb_t for more
857 * information, \since 0.9.15 */
858 #define PA_STREAM_EVENT_REQUEST_CORK "request-cork"
860 /** A stream policy/meta event requesting that an application should
861 * cork a specific stream. See pa_stream_event_cb_t for more
862 * information, \since 0.9.15 */
863 #define PA_STREAM_EVENT_REQUEST_UNCORK "request-uncork"