PipeWire  0.3.63
stream.h
1 /* PipeWire
2  *
3  * Copyright © 2018 Wim Taymans
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice (including the next
13  * paragraph) shall be included in all copies or substantial portions of the
14  * Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22  * DEALINGS IN THE SOFTWARE.
23  */
24 
25 #ifndef PIPEWIRE_STREAM_H
26 #define PIPEWIRE_STREAM_H
27 
28 #ifdef __cplusplus
29 extern "C" {
30 #endif
31 
188 struct pw_stream;
189 
190 #include <spa/buffer/buffer.h>
191 #include <spa/param/param.h>
192 #include <spa/pod/command.h>
193 
195 enum pw_stream_state {
196  PW_STREAM_STATE_ERROR = -1,
201 };
205 struct pw_buffer {
206  struct spa_buffer *buffer;
207  void *user_data;
208  uint64_t size;
212  uint64_t requested;
217 };
218 
219 struct pw_stream_control {
220  const char *name;
221  uint32_t flags;
222  float def;
223  float min;
224  float max;
225  float *values;
226  uint32_t n_values;
227  uint32_t max_values;
228 };
295 struct pw_time {
296  int64_t now;
302  struct spa_fraction rate;
304  uint64_t ticks;
307  int64_t delay;
316  uint64_t queued;
319  uint64_t buffered;
322  uint32_t queued_buffers;
323  uint32_t avail_buffers;
324 };
325 
326 #include <pipewire/port.h>
330 struct pw_stream_events {
331 #define PW_VERSION_STREAM_EVENTS 2
332  uint32_t version;
333 
334  void (*destroy) (void *data);
336  void (*state_changed) (void *data, enum pw_stream_state old,
337  enum pw_stream_state state, const char *error);
340  void (*control_info) (void *data, uint32_t id, const struct pw_stream_control *control);
341 
343  void (*io_changed) (void *data, uint32_t id, void *area, uint32_t size);
345  void (*param_changed) (void *data, uint32_t id, const struct spa_pod *param);
348  void (*add_buffer) (void *data, struct pw_buffer *buffer);
350  void (*remove_buffer) (void *data, struct pw_buffer *buffer);
356  void (*process) (void *data);
357 
359  void (*drained) (void *data);
360 
362  void (*command) (void *data, const struct spa_command *command);
363 
365  void (*trigger_done) (void *data);
366 };
367 
369 const char * pw_stream_state_as_string(enum pw_stream_state state);
370 
372 enum pw_stream_flags {
373  PW_STREAM_FLAG_NONE = 0,
374  PW_STREAM_FLAG_AUTOCONNECT = (1 << 0),
376  PW_STREAM_FLAG_INACTIVE = (1 << 1),
381  PW_STREAM_FLAG_RT_PROCESS = (1 << 4),
384  PW_STREAM_FLAG_NO_CONVERT = (1 << 5),
389  PW_STREAM_FLAG_ALLOC_BUFFERS = (1 << 8),
392  PW_STREAM_FLAG_TRIGGER = (1 << 9),
397 };
401 struct pw_stream *
402 pw_stream_new(struct pw_core *core,
403  const char *name,
404  struct pw_properties *props );
405 
406 struct pw_stream *
407 pw_stream_new_simple(struct pw_loop *loop,
408  const char *name,
409  struct pw_properties *props,
410  const struct pw_stream_events *events,
411  void *data );
412 
414 void pw_stream_destroy(struct pw_stream *stream);
415 
416 void pw_stream_add_listener(struct pw_stream *stream,
417  struct spa_hook *listener,
418  const struct pw_stream_events *events,
419  void *data);
420 
421 enum pw_stream_state pw_stream_get_state(struct pw_stream *stream, const char **error);
422 
423 const char *pw_stream_get_name(struct pw_stream *stream);
424 
425 struct pw_core *pw_stream_get_core(struct pw_stream *stream);
426 
427 const struct pw_properties *pw_stream_get_properties(struct pw_stream *stream);
428 
429 int pw_stream_update_properties(struct pw_stream *stream, const struct spa_dict *dict);
430 
436 int
437 pw_stream_connect(struct pw_stream *stream,
438  enum pw_direction direction,
439  uint32_t target_id,
449  enum pw_stream_flags flags,
450  const struct spa_pod **params,
453  uint32_t n_params );
454 
457 uint32_t
458 pw_stream_get_node_id(struct pw_stream *stream);
459 
461 int pw_stream_disconnect(struct pw_stream *stream);
462 
464 int pw_stream_set_error(struct pw_stream *stream,
465  int res,
466  const char *error,
467  ...) SPA_PRINTF_FUNC(3, 4);
468 
475 int
476 pw_stream_update_params(struct pw_stream *stream,
477  const struct spa_pod **params,
480  uint32_t n_params );
481 
483 const struct pw_stream_control *pw_stream_get_control(struct pw_stream *stream, uint32_t id);
484 
486 int pw_stream_set_control(struct pw_stream *stream, uint32_t id, uint32_t n_values, float *values, ...);
487 
489 int pw_stream_get_time_n(struct pw_stream *stream, struct pw_time *time, size_t size);
490 
494 int pw_stream_get_time(struct pw_stream *stream, struct pw_time *time);
495 
498 struct pw_buffer *pw_stream_dequeue_buffer(struct pw_stream *stream);
499 
501 int pw_stream_queue_buffer(struct pw_stream *stream, struct pw_buffer *buffer);
502 
504 int pw_stream_set_active(struct pw_stream *stream, bool active);
505 
508 int pw_stream_flush(struct pw_stream *stream, bool drain);
509 
514 bool pw_stream_is_driving(struct pw_stream *stream);
515 
518 int pw_stream_trigger_process(struct pw_stream *stream);
519 
524 #ifdef __cplusplus
525 }
526 #endif
527 
528 #endif /* PIPEWIRE_STREAM_H */
void pw_stream_destroy(struct pw_stream *stream)
Destroy a stream.
Definition: stream.c:1608
#define pw_direction
The direction of a port.
Definition: port.h:63
uint64_t ticks
the ticks at now.
Definition: stream.h:309
Definition: properties.h:53
the stream is in error
Definition: stream.h:201
uint32_t avail_buffers
The number of buffers that can be dequeued.
Definition: stream.h:328
uint32_t n_values
number of values in array
Definition: stream.h:231
the application will allocate buffer memory.
Definition: stream.h:395
float * values
array of values
Definition: stream.h:230
int64_t now
the monotonic time in nanoseconds.
Definition: stream.h:301
A hook, contains the structure with functions and the data passed to the functions.
Definition: hook.h:351
Definition: stream.h:224
Definition: loop.h:51
A time structure.
Definition: stream.h:300
struct spa_dict dict
dictionary of key/values
Definition: properties.h:54
void(* add_buffer)(void *data, struct pw_buffer *buffer)
when a new buffer was created for this stream
Definition: stream.h:354
int pw_stream_flush(struct pw_stream *stream, bool drain)
Flush a stream.
Definition: stream.c:2335
Events for a stream.
Definition: stream.h:335
call process from the realtime thread.
Definition: stream.h:387
uint32_t queued_buffers
The number of buffers that are queued.
Definition: stream.h:327
#define SPA_DEPRECATED
Definition: defs.h:295
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:321
don't try to reconnect this stream when the sink/source is removed
Definition: stream.h:393
int pw_stream_trigger_process(struct pw_stream *stream)
Trigger a push/pull on the stream.
Definition: stream.c:2382
connection is in progress
Definition: stream.h:203
void pw_stream_add_listener(struct pw_stream *stream, struct spa_hook *listener, const struct pw_stream_events *events, void *data)
Definition: stream.c:1661
const char * pw_stream_get_name(struct pw_stream *stream)
Definition: stream.c:1685
Definition: dict.h:59
try to automatically connect this stream
Definition: stream.h:380
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:2199
void(* command)(void *data, const struct spa_command *command)
A command notify, Since 0.3.39:1.
Definition: stream.h:368
uint64_t buffered
for audio/raw streams, this contains the extra number of samples buffered in the resampler.
Definition: stream.h:324
paused
Definition: stream.h:204
int pw_stream_update_properties(struct pw_stream *stream, const struct spa_dict *dict)
Definition: stream.c:1697
the output stream will not be scheduled automatically but _trigger_process() needs to be called...
Definition: stream.h:398
Definition: defs.h:139
float def
default value
Definition: stream.h:227
start the stream inactive, pw_stream_set_active() needs to be called explicitly
Definition: stream.h:382
bool pw_stream_is_driving(struct pw_stream *stream)
Check if the stream is driving.
Definition: stream.c:2347
int pw_stream_set_active(struct pw_stream *stream, bool active)
Activate or deactivate the stream.
Definition: stream.c:2178
pw_stream_state
The state of a stream.
Definition: stream.h:200
don't convert format
Definition: stream.h:390
void(* destroy)(void *data)
Definition: stream.h:340
int pw_stream_set_error(struct pw_stream *stream, int res, const char *error,...) 1(3
Set the stream in error state.
A Buffer.
Definition: buffer.h:111
Definition: pod.h:63
uint64_t size
This field is set by the user and the sum of all queued buffer is returned in the time info...
Definition: stream.h:213
unconnected
Definition: stream.h:202
enum pw_stream_state pw_stream_get_state(struct pw_stream *stream, const char **error)
Definition: stream.c:1677
const struct pw_stream_control * pw_stream_get_control(struct pw_stream *stream, uint32_t id)
Get control values.
Definition: stream.c:2164
void(* state_changed)(void *data, enum pw_stream_state old, enum pw_stream_state state, const char *error)
when the stream state changes
Definition: stream.h:342
be a driver
Definition: stream.h:386
const char * pw_stream_state_as_string(enum pw_stream_state state)
Convert a stream state to a readable string.
Definition: stream.c:1590
void(* remove_buffer)(void *data, struct pw_buffer *buffer)
when a buffer was destroyed for this stream
Definition: stream.h:356
void(* param_changed)(void *data, uint32_t id, const struct spa_pod *param)
when a parameter changed
Definition: stream.h:351
float max
max value
Definition: stream.h:229
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:1799
int pw_stream_disconnect(struct pw_stream *stream)
Disconnect stream.
Definition: stream.c:2028
void(* drained)(void *data)
The stream is drained.
Definition: stream.h:365
int64_t delay
delay to device.
Definition: stream.h:312
struct spa_buffer * buffer
the spa buffer
Definition: stream.h:211
uint64_t requested
For playback streams, this field contains the suggested amount of data to provide.
Definition: stream.h:217
void(* trigger_done)(void *data)
a trigger_process completed.
Definition: stream.h:371
int pw_stream_get_time_n(struct pw_stream *stream, struct pw_time *time, size_t size)
Query the time on the stream.
Definition: stream.c:2205
int int pw_stream_update_params(struct pw_stream *stream, const struct spa_pod **params, uint32_t n_params)
Complete the negotiation process with result code res.
Definition: stream.c:2086
void(* control_info)(void *data, uint32_t id, const struct pw_stream_control *control)
Notify information about a control.
Definition: stream.h:346
no flags
Definition: stream.h:379
require exclusive access to the device
Definition: stream.h:391
a buffer structure obtained from pw_stream_dequeue_buffer().
Definition: stream.h:210
void(* process)(void *data)
when a buffer can be queued (for playback streams) or dequeued (for capture streams).
Definition: stream.h:362
mmap the buffers except DmaBuf
Definition: stream.h:385
struct pw_stream * pw_stream_new(struct pw_core *core, const char *name, struct pw_properties *props)
Create a new unconneced Stream.
Definition: stream.c:1524
uint32_t flags
extra flags (unused)
Definition: stream.h:226
uint32_t flags
extra flags
Definition: properties.h:55
const struct pw_properties * pw_stream_get_properties(struct pw_stream *stream)
Definition: stream.c:1691
uint32_t version
Definition: stream.h:338
pw_stream_flags
Extra flags that can be used in pw_stream_connect()
Definition: stream.h:378
Definition: command.h:49
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:1546
uint32_t max_values
max values that can be set on this control
Definition: stream.h:232
float min
min value
Definition: stream.h:228
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:2254
void(* io_changed)(void *data, uint32_t id, void *area, uint32_t size)
when io changed on the stream.
Definition: stream.h:349
streaming
Definition: stream.h:205
void * user_data
user data attached to the buffer
Definition: stream.h:212
uint32_t pw_stream_get_node_id(struct pw_stream *stream)
Get the node ID of the stream.
Definition: stream.c:2022
#define SPA_PRINTF_FUNC(fmt, arg1)
Definition: defs.h:289
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:2281
struct pw_core * pw_stream_get_core(struct pw_stream *stream)
Definition: stream.c:1721
int pw_stream_set_control(struct pw_stream *stream, uint32_t id, uint32_t n_values, float *values,...)
Set control values.
Definition: stream.c:2104