PipeWire: pipewire/stream.h Source File

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stream.h
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1/* PipeWire */
2/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
3/* SPDX-License-Identifier: MIT */
4
5#ifndef PIPEWIRE_STREAM_H
6#define PIPEWIRE_STREAM_H
7
8#ifdef __cplusplus
9extern "C" {
10#endif
11
233
238struct pw_stream;
239
240#include <spa/buffer/buffer.h>
241#include <spa/param/param.h>
242#include <spa/pod/command.h>
243#include <spa/pod/event.h>
244
246enum pw_stream_state {
247 PW_STREAM_STATE_ERROR = -1,
248 PW_STREAM_STATE_UNCONNECTED = 0,
249 PW_STREAM_STATE_CONNECTING = 1,
250 PW_STREAM_STATE_PAUSED = 2,
251 PW_STREAM_STATE_STREAMING = 3
252};
253
256 struct pw_buffer {
257 struct spa_buffer *buffer;
258 void *user_data;
261 * cleanup should be performed in the remove_buffer
262 * event. The user data is returned unmodified each
263 * time a buffer is dequeued. */
264 uint64_t size;
268 uint64_t requested;
273 uint64_t time;
278};
279
280struct pw_stream_control {
281 const char *name;
282 uint32_t flags;
283 float def;
284 float min;
285 float max;
286 float *values;
287 uint32_t n_values;
288 uint32_t max_values;
289};
290
295
371struct pw_time {
372 int64_t now;
376 * the current time and calculate updated ticks and delay
377 * values. */
378 struct spa_fraction rate;
380 uint64_t ticks;
383 int64_t delay;
392 uint64_t queued;
395 uint64_t buffered;
398 uint32_t queued_buffers;
399 uint32_t avail_buffers;
400 uint64_t size;
404};
405
406#include <pipewire/port.h>
407
410struct pw_stream_events {
411#define PW_VERSION_STREAM_EVENTS 2
412 uint32_t version;
413
414 void (*destroy) (void *data);
415 /** when the stream state changes. Since 1.4 this also sets errno when the
416 * new state is PW_STREAM_STATE_ERROR */
417 void (*state_changed) (void *data, enum pw_stream_state old,
418 enum pw_stream_state state, const char *error);
419
421 void (*control_info) (void *data, uint32_t id, const struct pw_stream_control *control);
422
424 void (*io_changed) (void *data, uint32_t id, void *area, uint32_t size);
426 void (*param_changed) (void *data, uint32_t id, const struct spa_pod *param);
427
429 void (*add_buffer) (void *data, struct pw_buffer *buffer);
431 void (*remove_buffer) (void *data, struct pw_buffer *buffer);
432
437 void (*process) (void *data);
438
440 void (*drained) (void *data);
441
443 void (*command) (void *data, const struct spa_command *command);
444
449 void (*trigger_done) (void *data);
450};
451
453const char * pw_stream_state_as_string(enum pw_stream_state state);
454
456enum pw_stream_flags {
457 PW_STREAM_FLAG_NONE = 0,
458 PW_STREAM_FLAG_AUTOCONNECT = (1 << 0),
460 PW_STREAM_FLAG_INACTIVE = (1 << 1),
462 * called explicitly */
463 PW_STREAM_FLAG_MAP_BUFFERS = (1 << 2),
465 PW_STREAM_FLAG_DRIVER = (1 << 3),
466 PW_STREAM_FLAG_RT_PROCESS = (1 << 4),
469 PW_STREAM_FLAG_NO_CONVERT = (1 << 5),
470 PW_STREAM_FLAG_EXCLUSIVE = (1 << 6),
472 PW_STREAM_FLAG_DONT_RECONNECT = (1 << 7),
474 PW_STREAM_FLAG_ALLOC_BUFFERS = (1 << 8),
477 PW_STREAM_FLAG_TRIGGER = (1 << 9),
482 PW_STREAM_FLAG_ASYNC = (1 << 10),
489 PW_STREAM_FLAG_EARLY_PROCESS = (1 << 11),
494 PW_STREAM_FLAG_RT_TRIGGER_DONE = (1 << 12),
497};
498
501struct pw_stream *
502 pw_stream_new(struct pw_core *core,
503 const char *name,
504 struct pw_properties *props );
505
506struct pw_stream *
507 pw_stream_new_simple(struct pw_loop *loop,
508 const char *name,
509 struct pw_properties *props,
510 const struct pw_stream_events *events,
511 void *data );
512
514void pw_stream_destroy(struct pw_stream *stream);
515
516void pw_stream_add_listener(struct pw_stream *stream,
517 struct spa_hook *listener,
518 const struct pw_stream_events *events,
519 void *data);
520
523enum pw_stream_state pw_stream_get_state(struct pw_stream *stream, const char **error);
524
525const char *pw_stream_get_name(struct pw_stream *stream);
526
527struct pw_core *pw_stream_get_core(struct pw_stream *stream);
528
529const struct pw_properties *pw_stream_get_properties(struct pw_stream *stream);
530
531int pw_stream_update_properties(struct pw_stream *stream, const struct spa_dict *dict);
532
538int
539 pw_stream_connect(struct pw_stream *stream,
540 enum pw_direction direction,
541 uint32_t target_id,
551 enum pw_stream_flags flags,
552 const struct spa_pod **params,
555 uint32_t n_params );
556
559uint32_t
560 pw_stream_get_node_id(struct pw_stream *stream);
561
563int pw_stream_disconnect(struct pw_stream *stream);
564
566int pw_stream_set_error(struct pw_stream *stream,
567 int res,
568 const char *error,
569 ...) SPA_PRINTF_FUNC(3, 4);
570
572int
573 pw_stream_update_params(struct pw_stream *stream,
574 const struct spa_pod **params,
575 uint32_t n_params );
576
581int pw_stream_set_param(struct pw_stream *stream,
582 uint32_t id,
583 const struct spa_pod *param );
584
586const struct pw_stream_control *pw_stream_get_control(struct pw_stream *stream, uint32_t id);
587
589int pw_stream_set_control(struct pw_stream *stream, uint32_t id, uint32_t n_values, float *values, ...);
590
592int pw_stream_get_time_n(struct pw_stream *stream, struct pw_time *time, size_t size);
593
596uint64_t pw_stream_get_nsec(struct pw_stream *stream);
597
600struct pw_loop *pw_stream_get_data_loop(struct pw_stream *stream);
601
604 SPA_DEPRECATED
605int pw_stream_get_time(struct pw_stream *stream, struct pw_time *time);
606
609struct pw_buffer *pw_stream_dequeue_buffer(struct pw_stream *stream);
610
612int pw_stream_queue_buffer(struct pw_stream *stream, struct pw_buffer *buffer);
613
616int pw_stream_return_buffer(struct pw_stream *stream, struct pw_buffer *buffer);
617
619int pw_stream_set_active(struct pw_stream *stream, bool active);
620
627int pw_stream_flush(struct pw_stream *stream, bool drain);
628
633bool pw_stream_is_driving(struct pw_stream *stream);
634
648bool pw_stream_is_lazy(struct pw_stream *stream);
649
679int pw_stream_trigger_process(struct pw_stream *stream);
680
683int pw_stream_emit_event(struct pw_stream *stream, const struct spa_event *event);
684
691int pw_stream_set_rate(struct pw_stream *stream, double rate);
692
696
697#ifdef __cplusplus
698}
699#endif
700
701#endif /* PIPEWIRE_STREAM_H */
buffer.h
spa/buffer/buffer.h
id
uint32_t id
Definition core.h:432
res
uint32_t int int res
Definition core.h:433
pw_direction
#define pw_direction
The direction of a port.
Definition port.h:51
pw_stream_flags
pw_stream_flags
Extra flags that can be used in pw_stream_connect()
Definition stream.h:462
pw_stream_update_properties
int pw_stream_update_properties(struct pw_stream *stream, const struct spa_dict *dict)
Definition stream.c:1799
pw_stream_get_state
enum pw_stream_state pw_stream_get_state(struct pw_stream *stream, const char **error)
Get the current stream state.
Definition stream.c:1777
pw_stream_connect
int pw_stream_connect(struct pw_stream *stream, enum pw_direction direction, uint32_t target_id, enum pw_stream_flags flags, const struct spa_pod **params, uint32_t n_params)
Connect a stream for input or output on port_path.
Definition stream.c:1902
pw_stream_dequeue_buffer
struct pw_buffer * pw_stream_dequeue_buffer(struct pw_stream *stream)
Get a buffer that can be filled for playback streams or consumed for capture streams.
Definition stream.c:2458
pw_stream_get_node_id
uint32_t pw_stream_get_node_id(struct pw_stream *stream)
Get the node ID of the stream.
Definition stream.c:2192
pw_stream_get_nsec
uint64_t pw_stream_get_nsec(struct pw_stream *stream)
Get the current time in nanoseconds.
Definition stream.c:2434
pw_stream_emit_event
int pw_stream_emit_event(struct pw_stream *stream, const struct spa_event *event)
Emit an event from this stream.
Definition stream.c:2638
pw_stream_set_control
int pw_stream_set_control(struct pw_stream *stream, uint32_t id, uint32_t n_values, float *values,...)
Set control values.
Definition stream.c:2274
pw_stream_return_buffer
int pw_stream_return_buffer(struct pw_stream *stream, struct pw_buffer *buffer)
Return a buffer to the queue without using it.
Definition stream.c:2528
pw_stream_get_data_loop
struct pw_loop * pw_stream_get_data_loop(struct pw_stream *stream)
Get the data loop that is doing the processing of this stream.
Definition stream.c:2442
pw_stream_is_driving
bool pw_stream_is_driving(struct pw_stream *stream)
Check if the stream is driving.
Definition stream.c:2602
pw_stream_flush
int pw_stream_flush(struct pw_stream *stream, bool drain)
Flush a stream.
Definition stream.c:2585
pw_stream_new
struct pw_stream * pw_stream_new(struct pw_core *core, const char *name, struct pw_properties *props)
Create a new unconnected Stream.
Definition stream.c:1577
pw_stream_get_time
int pw_stream_get_time(struct pw_stream *stream, struct pw_time *time)
Query the time on the stream, deprecated since 0.3.50, use pw_stream_get_time_n() to get the fields a...
Definition stream.c:2379
pw_stream_set_rate
int pw_stream_set_rate(struct pw_stream *stream, double rate)
Adjust the rate of the stream.
Definition stream.c:2669
pw_stream_get_control
const struct pw_stream_control * pw_stream_get_control(struct pw_stream *stream, uint32_t id)
Get control values.
Definition stream.c:2335
pw_stream_state_as_string
const char * pw_stream_state_as_string(enum pw_stream_state state)
Convert a stream state to a readable string.
Definition stream.c:1643
pw_stream_set_param
int pw_stream_set_param(struct pw_stream *stream, uint32_t id, const struct spa_pod *param)
Set a parameter on the stream.
Definition stream.c:2262
pw_stream_state
pw_stream_state
The state of a stream.
Definition stream.h:251
pw_stream_set_error
int pw_stream_set_error(struct pw_stream *stream, int res, const char *error,...)
Set the stream in error state.
Definition stream.c:2206
pw_stream_disconnect
int pw_stream_disconnect(struct pw_stream *stream)
Disconnect stream.
Definition stream.c:2198
pw_stream_update_params
int pw_stream_update_params(struct pw_stream *stream, const struct spa_pod **params, uint32_t n_params)
Update the param exposed on the stream.
Definition stream.c:2232
pw_stream_set_active
int pw_stream_set_active(struct pw_stream *stream, bool active)
Activate or deactivate the stream.
Definition stream.c:2349
pw_stream_trigger_process
int pw_stream_trigger_process(struct pw_stream *stream)
Trigger a push/pull on the stream.
Definition stream.c:2646
pw_stream_queue_buffer
int pw_stream_queue_buffer(struct pw_stream *stream, struct pw_buffer *buffer)
Submit a buffer for playback or recycle a buffer for capture.
Definition stream.c:2486
pw_stream_is_lazy
bool pw_stream_is_lazy(struct pw_stream *stream)
Check if the graph is using lazy scheduling.
Definition stream.c:2608
pw_stream_get_name
const char * pw_stream_get_name(struct pw_stream *stream)
Definition stream.c:1787
pw_stream_new_simple
struct pw_stream * pw_stream_new_simple(struct pw_loop *loop, const char *name, struct pw_properties *props, const struct pw_stream_events *events, void *data)
Definition stream.c:1599
pw_stream_get_properties
const struct pw_properties * pw_stream_get_properties(struct pw_stream *stream)
Definition stream.c:1793
pw_stream_get_time_n
int pw_stream_get_time_n(struct pw_stream *stream, struct pw_time *time, size_t size)
Query the time on the stream, RT safe.
Definition stream.c:2385
pw_stream_add_listener
void pw_stream_add_listener(struct pw_stream *stream, struct spa_hook *listener, const struct pw_stream_events *events, void *data)
Definition stream.c:1758
pw_stream_destroy
void pw_stream_destroy(struct pw_stream *stream)
Destroy a stream.
Definition stream.c:1693
pw_stream_get_core
struct pw_core * pw_stream_get_core(struct pw_stream *stream)
Definition stream.c:1825
PW_STREAM_FLAG_EARLY_PROCESS
@ PW_STREAM_FLAG_EARLY_PROCESS
Call process as soon as there is a buffer to dequeue.
Definition stream.h:495
PW_STREAM_FLAG_INACTIVE
@ PW_STREAM_FLAG_INACTIVE
start the stream inactive, pw_stream_set_active() needs to be called explicitly
Definition stream.h:466
PW_STREAM_FLAG_RT_TRIGGER_DONE
@ PW_STREAM_FLAG_RT_TRIGGER_DONE
Call trigger_done from the realtime thread.
Definition stream.h:500
PW_STREAM_FLAG_MAP_BUFFERS
@ PW_STREAM_FLAG_MAP_BUFFERS
mmap the buffers except DmaBuf that is not explicitly marked as mappable.
Definition stream.h:469
PW_STREAM_FLAG_DRIVER
@ PW_STREAM_FLAG_DRIVER
be a driver
Definition stream.h:471
PW_STREAM_FLAG_EXCLUSIVE
@ PW_STREAM_FLAG_EXCLUSIVE
require exclusive access to the device
Definition stream.h:476
PW_STREAM_FLAG_ASYNC
@ PW_STREAM_FLAG_ASYNC
Buffers will not be dequeued/queued from the realtime process() function.
Definition stream.h:488
PW_STREAM_FLAG_NO_CONVERT
@ PW_STREAM_FLAG_NO_CONVERT
don't convert format
Definition stream.h:475
PW_STREAM_FLAG_TRIGGER
@ PW_STREAM_FLAG_TRIGGER
the output stream will not be scheduled automatically but _trigger_process() needs to be called.
Definition stream.h:483
PW_STREAM_FLAG_DONT_RECONNECT
@ PW_STREAM_FLAG_DONT_RECONNECT
don't try to reconnect this stream when the sink/source is removed
Definition stream.h:478
PW_STREAM_FLAG_AUTOCONNECT
@ PW_STREAM_FLAG_AUTOCONNECT
try to automatically connect this stream
Definition stream.h:464
PW_STREAM_FLAG_ALLOC_BUFFERS
@ PW_STREAM_FLAG_ALLOC_BUFFERS
the application will allocate buffer memory.
Definition stream.h:480
PW_STREAM_FLAG_RT_PROCESS
@ PW_STREAM_FLAG_RT_PROCESS
call process from the realtime thread.
Definition stream.h:472
PW_STREAM_FLAG_NONE
@ PW_STREAM_FLAG_NONE
no flags
Definition stream.h:463
PW_STREAM_STATE_PAUSED
@ PW_STREAM_STATE_PAUSED
paused
Definition stream.h:255
PW_STREAM_STATE_CONNECTING
@ PW_STREAM_STATE_CONNECTING
connection is in progress
Definition stream.h:254
PW_STREAM_STATE_UNCONNECTED
@ PW_STREAM_STATE_UNCONNECTED
unconnected
Definition stream.h:253
PW_STREAM_STATE_ERROR
@ PW_STREAM_STATE_ERROR
the stream is in error
Definition stream.h:252
PW_STREAM_STATE_STREAMING
@ PW_STREAM_STATE_STREAMING
streaming
Definition stream.h:256
SPA_DEPRECATED
#define SPA_DEPRECATED
Definition defs.h:301
SPA_PRINTF_FUNC
#define SPA_PRINTF_FUNC(fmt, arg1)
Definition defs.h:295
param.h
spa/param/param.h
command.h
spa/pod/command.h
event.h
spa/pod/event.h
port.h
pipewire/port.h
pw_buffer
a buffer structure obtained from pw_stream_dequeue_buffer().
Definition stream.h:261
pw_buffer::size
uint64_t size
This field is set by the user and the sum of all queued buffers is returned in the time info.
Definition stream.h:269
pw_buffer::time
uint64_t time
For capture streams, this field contains the cycle time in nanoseconds when this buffer was queued in...
Definition stream.h:278
pw_buffer::requested
uint64_t requested
For playback streams, this field contains the suggested amount of data to provide.
Definition stream.h:273
pw_buffer::user_data
void * user_data
user data attached to the buffer.
Definition stream.h:263
pw_core
pw_loop
Definition loop.h:33
pw_properties
Definition properties.h:39
pw_properties::dict
struct spa_dict dict
dictionary of key/values
Definition properties.h:40
pw_properties::flags
uint32_t flags
extra flags
Definition properties.h:41
pw_stream_control
Definition stream.h:285
pw_stream_control::max
float max
max value
Definition stream.h:290
pw_stream_control::flags
uint32_t flags
extra flags (unused)
Definition stream.h:287
pw_stream_control::def
float def
default value
Definition stream.h:288
pw_stream_control::max_values
uint32_t max_values
max values that can be set on this control
Definition stream.h:293
pw_stream_control::min
float min
min value
Definition stream.h:289
pw_stream_control::n_values
uint32_t n_values
number of values in array
Definition stream.h:292
pw_stream_control::values
float * values
array of values
Definition stream.h:291
pw_stream_events
Events for a stream.
Definition stream.h:415
pw_stream_events::remove_buffer
void(* remove_buffer)(void *data, struct pw_buffer *buffer)
when a buffer was destroyed for this stream
Definition stream.h:437
pw_stream_events::control_info
void(* control_info)(void *data, uint32_t id, const struct pw_stream_control *control)
Notify information about a control.
Definition stream.h:427
pw_stream_events::trigger_done
void(* trigger_done)(void *data)
a trigger_process completed.
Definition stream.h:455
pw_stream_events::param_changed
void(* param_changed)(void *data, uint32_t id, const struct spa_pod *param)
when a parameter changed
Definition stream.h:432
pw_stream_events::process
void(* process)(void *data)
when a buffer can be queued (for playback streams) or dequeued (for capture streams).
Definition stream.h:443
pw_stream_events::command
void(* command)(void *data, const struct spa_command *command)
A command notify, Since 0.3.39:1.
Definition stream.h:449
pw_stream_events::version
uint32_t version
Definition stream.h:418
pw_stream_events::drained
void(* drained)(void *data)
The stream is drained.
Definition stream.h:446
pw_stream_events::destroy
void(* destroy)(void *data)
Definition stream.h:420
pw_stream_events::add_buffer
void(* add_buffer)(void *data, struct pw_buffer *buffer)
when a new buffer was created for this stream
Definition stream.h:435
pw_stream_events::io_changed
void(* io_changed)(void *data, uint32_t id, void *area, uint32_t size)
when io changed on the stream.
Definition stream.h:430
pw_stream
pw_time
A time structure.
Definition stream.h:376
pw_time::delay
int64_t delay
delay to device.
Definition stream.h:388
pw_time::rate
struct spa_fraction rate
the rate of ticks and delay.
Definition stream.h:383
pw_time::buffered
uint64_t buffered
for audio/raw streams, this contains the extra number of frames buffered in the resampler.
Definition stream.h:400
pw_time::queued
uint64_t queued
data queued in the stream, this is the sum of the size fields in the pw_buffer that are currently que...
Definition stream.h:397
pw_time::queued_buffers
uint32_t queued_buffers
the number of buffers that are queued.
Definition stream.h:403
pw_time::ticks
uint64_t ticks
the ticks at now.
Definition stream.h:385
pw_time::size
uint64_t size
for audio/raw playback streams, this contains the number of samples requested by the resampler for th...
Definition stream.h:405
pw_time::now
int64_t now
the time in nanoseconds.
Definition stream.h:377
pw_time::avail_buffers
uint32_t avail_buffers
the number of buffers that can be dequeued.
Definition stream.h:404
spa_buffer
A Buffer.
Definition buffer.h:110
spa_command
Definition command.h:29
spa_dict
Definition dict.h:51
spa_event
Definition event.h:28
spa_fraction
Definition defs.h:137
spa_hook
A hook, contains the structure with functions and the data passed to the functions.
Definition hook.h:427
spa_pod
Definition pod.h:43