1 #ifndef foopulsesinkhfoo
2 #define foopulsesinkhfoo
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 published
12 by the Free Software Foundation; either version 2.1 of the License,
13 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 General Public License for more details.
20 You should have received a copy of the GNU Lesser General Public License
21 along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
26 #include <pulsecore/typedefs.h>
27 #include <pulse/def.h>
28 #include <pulse/format.h>
29 #include <pulse/sample.h>
30 #include <pulse/channelmap.h>
31 #include <pulse/volume.h>
33 #include <pulsecore/core.h>
34 #include <pulsecore/idxset.h>
35 #include <pulsecore/memchunk.h>
36 #include <pulsecore/source.h>
37 #include <pulsecore/module.h>
38 #include <pulsecore/asyncmsgq.h>
39 #include <pulsecore/msgobject.h>
40 #include <pulsecore/rtpoll.h>
41 #include <pulsecore/device-port.h>
42 #include <pulsecore/card.h>
43 #include <pulsecore/queue.h>
44 #include <pulsecore/thread-mq.h>
45 #include <pulsecore/sink-input.h>
47 #define PA_MAX_INPUTS_PER_SINK 256
49 /* Returns true if sink is linked: registered and accessible from client side. */
50 static inline bool PA_SINK_IS_LINKED(pa_sink_state_t x) {
51 return x == PA_SINK_RUNNING || x == PA_SINK_IDLE || x == PA_SINK_SUSPENDED;
54 /* A generic definition for void callback functions */
55 typedef void(*pa_sink_cb_t)(pa_sink *s);
57 typedef int (*pa_sink_get_mute_cb_t)(pa_sink *s, bool *mute);
65 pa_sink_state_t state;
67 /* Set in the beginning of pa_sink_unlink() before setting the sink state
68 * to UNLINKED. The purpose is to prevent moving streams to a sink that is
69 * about to be removed. */
70 bool unlink_requested;
72 pa_sink_flags_t flags;
73 pa_suspend_cause_t suspend_cause;
76 char *driver; /* may be NULL */
77 pa_proplist *proplist;
79 pa_module *module; /* may be NULL */
80 pa_card *card; /* may be NULL */
82 pa_sample_spec sample_spec;
83 pa_channel_map channel_map;
84 uint32_t default_sample_rate;
85 uint32_t alternate_sample_rate;
89 pa_source *monitor_source;
90 pa_sink_input *input_to_master; /* non-NULL only for filter sinks */
92 pa_volume_t base_volume; /* shall be constant */
93 unsigned n_volume_steps; /* shall be constant */
95 /* Also see http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/Developer/Volumes/ */
96 pa_cvolume reference_volume; /* The volume exported and taken as reference base for relative sink input volumes */
97 pa_cvolume real_volume; /* The volume that the hardware is configured to */
98 pa_cvolume soft_volume; /* The internal software volume we apply to all PCM data while it passes through */
102 bool refresh_volume:1;
103 bool refresh_muted:1;
108 /* Saved volume state while we're in passthrough mode */
109 pa_cvolume saved_volume;
110 bool saved_save_volume:1;
111 bool is_passthrough_set:1;
113 pa_asyncmsgq *asyncmsgq;
118 pa_device_port *active_port;
119 pa_atomic_t mixer_dirty;
121 /* The latency offset is inherited from the currently active port */
122 int64_t port_latency_offset;
126 bool set_mute_in_progress;
128 /* Called when the main loop requests a state change. Called from
129 * main loop context. If returns -1 the state change will be
131 int (*set_state)(pa_sink *s, pa_sink_state_t state); /* may be NULL */
133 /* Sink drivers that support hardware volume may set this
134 * callback. This is called when the current volume needs to be
135 * re-read from the hardware.
137 * There are two ways for drivers to implement hardware volume
138 * query: either set this callback or handle
139 * PA_SINK_MESSAGE_GET_VOLUME. The callback implementation or the
140 * message handler must update s->real_volume and s->soft_volume
141 * (using pa_sink_set_soft_volume()) to match the current hardware
144 * If PA_SINK_DEFERRED_VOLUME is not set, then this is called from the
145 * main thread before sending PA_SINK_MESSAGE_GET_VOLUME, so in
146 * this case the driver can choose whether to read the volume from
147 * the hardware in the main thread or in the IO thread.
149 * If PA_SINK_DEFERRED_VOLUME is set, then this is called from the IO
150 * thread within the default handler for
151 * PA_SINK_MESSAGE_GET_VOLUME (the main thread is waiting while
152 * the message is being processed), so there's no choice of where
153 * to do the volume reading - it has to be done in the IO thread
156 * You must use the function pa_sink_set_get_volume_callback() to
157 * set this callback. */
158 pa_sink_cb_t get_volume; /* may be NULL */
160 /* Sink drivers that support hardware volume must set this
161 * callback. This is called when the hardware volume needs to be
164 * If PA_SINK_DEFERRED_VOLUME is not set, then this is called from the
165 * main thread. The callback implementation must set the hardware
166 * volume according to s->real_volume. If the driver can't set the
167 * hardware volume to the exact requested value, it has to update
168 * s->real_volume and/or s->soft_volume so that they together
169 * match the actual hardware volume that was set.
171 * If PA_SINK_DEFERRED_VOLUME is set, then this is called from the IO
172 * thread. The callback implementation must not actually set the
173 * hardware volume yet, but it must check how close to the
174 * requested volume the hardware volume can be set, and update
175 * s->real_volume and/or s->soft_volume so that they together
176 * match the actual hardware volume that will be set later in the
177 * write_volume callback.
179 * You must use the function pa_sink_set_set_volume_callback() to
180 * set this callback. */
181 pa_sink_cb_t set_volume; /* may be NULL */
183 /* Sink drivers that set PA_SINK_DEFERRED_VOLUME must provide this
184 * callback. This callback is not used with sinks that do not set
185 * PA_SINK_DEFERRED_VOLUME. This is called from the IO thread when a
186 * pending hardware volume change has to be written to the
187 * hardware. The requested volume is passed to the callback
188 * implementation in s->thread_info.current_hw_volume.
190 * The call is done inside pa_sink_volume_change_apply(), which is
191 * not called automatically - it is the driver's responsibility to
192 * schedule that function to be called at the right times in the
195 * You must use the function pa_sink_set_write_volume_callback() to
196 * set this callback. */
197 pa_sink_cb_t write_volume; /* may be NULL */
199 /* If the sink mute can change "spontaneously" (i.e. initiated by the sink
200 * implementation, not by someone else calling pa_sink_set_mute()), then
201 * the sink implementation can notify about changed mute either by calling
202 * pa_sink_mute_changed() or by calling pa_sink_get_mute() with
203 * force_refresh=true. If the implementation chooses the latter approach,
204 * it should implement the get_mute callback. Otherwise get_mute can be
207 * This is called when pa_sink_get_mute() is called with
208 * force_refresh=true. This is called from the IO thread if the
209 * PA_SINK_DEFERRED_VOLUME flag is set, otherwise this is called from the
210 * main thread. On success, the implementation is expected to return 0 and
211 * set the mute parameter that is passed as a reference. On failure, the
212 * implementation is expected to return -1.
214 * You must use the function pa_sink_set_get_mute_callback() to
215 * set this callback. */
216 pa_sink_get_mute_cb_t get_mute;
218 /* Called when the mute setting shall be changed. A PA_SINK_MESSAGE_SET_MUTE
219 * message will also be sent. Called from IO thread if PA_SINK_DEFERRED_VOLUME
220 * flag is set otherwise from main loop context.
222 * You must use the function pa_sink_set_set_mute_callback() to
223 * set this callback. */
224 pa_sink_cb_t set_mute; /* may be NULL */
226 /* Called when a rewind request is issued. Called from IO thread
228 pa_sink_cb_t request_rewind; /* may be NULL */
230 /* Called when a the requested latency is changed. Called from IO
232 pa_sink_cb_t update_requested_latency; /* may be NULL */
234 /* Called whenever the port shall be changed. Called from IO
235 * thread if deferred volumes are enabled, and main thread otherwise. */
236 int (*set_port)(pa_sink *s, pa_device_port *port); /* may be NULL */
238 /* Called to get the list of formats supported by the sink, sorted
239 * in descending order of preference. */
240 pa_idxset* (*get_formats)(pa_sink *s); /* may be NULL */
242 /* Called to set the list of formats supported by the sink. Can be
243 * NULL if the sink does not support this. Returns true on success,
244 * false otherwise (for example when an unsupportable format is
245 * set). Makes a copy of the formats passed in. */
246 bool (*set_formats)(pa_sink *s, pa_idxset *formats); /* may be NULL */
248 /* Called whenever the sampling frequency shall be changed. Called from
250 int (*update_rate)(pa_sink *s, uint32_t rate);
252 /* Contains copies of the above data so that the real-time worker
253 * thread can work without access locking */
255 pa_sink_state_t state;
260 pa_cvolume soft_volume;
263 /* The requested latency is used for dynamic latency
264 * sinks. For fixed latency sinks it is always identical to
265 * the fixed_latency. See below. */
266 bool requested_latency_valid:1;
267 pa_usec_t requested_latency;
269 /* The number of bytes streams need to keep around as history to
270 * be able to satisfy every DMA buffer rewrite */
273 /* The number of bytes streams need to keep around to satisfy
274 * every DMA write request */
277 /* Maximum of what clients requested to rewind in this cycle */
278 size_t rewind_nbytes;
279 bool rewind_requested;
281 /* Both dynamic and fixed latencies will be clamped to this
283 pa_usec_t min_latency; /* we won't go below this latency */
284 pa_usec_t max_latency; /* An upper limit for the latencies */
286 /* 'Fixed' simply means that the latency is exclusively
287 * decided on by the sink, and the clients have no influence
289 pa_usec_t fixed_latency; /* for sinks with PA_SINK_DYNAMIC_LATENCY this is 0 */
291 /* This latency offset is a direct copy from s->port_latency_offset */
292 int64_t port_latency_offset;
294 /* Delayed volume change events are queued here. The events
295 * are stored in expiration order. The one expiring next is in
296 * the head of the list. */
297 PA_LLIST_HEAD(pa_sink_volume_change, volume_changes);
298 pa_sink_volume_change *volume_changes_tail;
299 /* This value is updated in pa_sink_volume_change_apply() and
300 * used only by sinks with PA_SINK_DEFERRED_VOLUME. */
301 pa_cvolume current_hw_volume;
303 /* The amount of usec volume up events are delayed and volume
304 * down events are made earlier. */
305 uint32_t volume_change_safety_margin;
306 /* Usec delay added to all volume change events, may be negative. */
307 int32_t volume_change_extra_delay;
313 PA_DECLARE_PUBLIC_CLASS(pa_sink);
314 #define PA_SINK(s) (pa_sink_cast(s))
316 typedef enum pa_sink_message {
317 PA_SINK_MESSAGE_ADD_INPUT,
318 PA_SINK_MESSAGE_REMOVE_INPUT,
319 PA_SINK_MESSAGE_GET_VOLUME,
320 PA_SINK_MESSAGE_SET_SHARED_VOLUME,
321 PA_SINK_MESSAGE_SET_VOLUME_SYNCED,
322 PA_SINK_MESSAGE_SET_VOLUME,
323 PA_SINK_MESSAGE_SYNC_VOLUMES,
324 PA_SINK_MESSAGE_GET_MUTE,
325 PA_SINK_MESSAGE_SET_MUTE,
326 PA_SINK_MESSAGE_GET_LATENCY,
327 PA_SINK_MESSAGE_GET_REQUESTED_LATENCY,
328 PA_SINK_MESSAGE_SET_STATE,
329 PA_SINK_MESSAGE_START_MOVE,
330 PA_SINK_MESSAGE_FINISH_MOVE,
331 PA_SINK_MESSAGE_SET_LATENCY_RANGE,
332 PA_SINK_MESSAGE_GET_LATENCY_RANGE,
333 PA_SINK_MESSAGE_SET_FIXED_LATENCY,
334 PA_SINK_MESSAGE_GET_FIXED_LATENCY,
335 PA_SINK_MESSAGE_GET_MAX_REWIND,
336 PA_SINK_MESSAGE_GET_MAX_REQUEST,
337 PA_SINK_MESSAGE_SET_MAX_REWIND,
338 PA_SINK_MESSAGE_SET_MAX_REQUEST,
339 PA_SINK_MESSAGE_SET_PORT,
340 PA_SINK_MESSAGE_UPDATE_VOLUME_AND_MUTE,
341 PA_SINK_MESSAGE_SET_PORT_LATENCY_OFFSET,
345 typedef struct pa_sink_new_data {
346 pa_suspend_cause_t suspend_cause;
349 pa_proplist *proplist;
358 pa_sample_spec sample_spec;
359 pa_channel_map channel_map;
360 uint32_t alternate_sample_rate;
364 bool sample_spec_is_set:1;
365 bool channel_map_is_set:1;
366 bool alternate_sample_rate_is_set:1;
367 bool volume_is_set:1;
377 pa_sink_new_data* pa_sink_new_data_init(pa_sink_new_data *data);
378 void pa_sink_new_data_set_name(pa_sink_new_data *data, const char *name);
379 void pa_sink_new_data_set_sample_spec(pa_sink_new_data *data, const pa_sample_spec *spec);
380 void pa_sink_new_data_set_channel_map(pa_sink_new_data *data, const pa_channel_map *map);
381 void pa_sink_new_data_set_alternate_sample_rate(pa_sink_new_data *data, const uint32_t alternate_sample_rate);
382 void pa_sink_new_data_set_volume(pa_sink_new_data *data, const pa_cvolume *volume);
383 void pa_sink_new_data_set_muted(pa_sink_new_data *data, bool mute);
384 void pa_sink_new_data_set_port(pa_sink_new_data *data, const char *port);
385 void pa_sink_new_data_done(pa_sink_new_data *data);
387 /*** To be called exclusively by the sink driver, from main context */
389 pa_sink* pa_sink_new(
391 pa_sink_new_data *data,
392 pa_sink_flags_t flags);
394 void pa_sink_set_get_volume_callback(pa_sink *s, pa_sink_cb_t cb);
395 void pa_sink_set_set_volume_callback(pa_sink *s, pa_sink_cb_t cb);
396 void pa_sink_set_write_volume_callback(pa_sink *s, pa_sink_cb_t cb);
397 void pa_sink_set_get_mute_callback(pa_sink *s, pa_sink_get_mute_cb_t cb);
398 void pa_sink_set_set_mute_callback(pa_sink *s, pa_sink_cb_t cb);
399 void pa_sink_enable_decibel_volume(pa_sink *s, bool enable);
401 void pa_sink_put(pa_sink *s);
402 void pa_sink_unlink(pa_sink* s);
404 void pa_sink_set_description(pa_sink *s, const char *description);
405 void pa_sink_set_asyncmsgq(pa_sink *s, pa_asyncmsgq *q);
406 void pa_sink_set_rtpoll(pa_sink *s, pa_rtpoll *p);
408 void pa_sink_set_max_rewind(pa_sink *s, size_t max_rewind);
409 void pa_sink_set_max_request(pa_sink *s, size_t max_request);
410 void pa_sink_set_latency_range(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency);
411 void pa_sink_set_fixed_latency(pa_sink *s, pa_usec_t latency);
413 void pa_sink_set_soft_volume(pa_sink *s, const pa_cvolume *volume);
414 void pa_sink_volume_changed(pa_sink *s, const pa_cvolume *new_volume);
415 void pa_sink_mute_changed(pa_sink *s, bool new_muted);
417 void pa_sink_update_flags(pa_sink *s, pa_sink_flags_t mask, pa_sink_flags_t value);
419 bool pa_device_init_description(pa_proplist *p, pa_card *card);
420 bool pa_device_init_icon(pa_proplist *p, bool is_sink);
421 bool pa_device_init_intended_roles(pa_proplist *p);
422 unsigned pa_device_init_priority(pa_proplist *p);
424 /**** May be called by everyone, from main context */
426 int pa_sink_update_rate(pa_sink *s, uint32_t rate, bool passthrough);
427 void pa_sink_set_port_latency_offset(pa_sink *s, int64_t offset);
429 /* The returned value is supposed to be in the time domain of the sound card! */
430 pa_usec_t pa_sink_get_latency(pa_sink *s);
431 pa_usec_t pa_sink_get_requested_latency(pa_sink *s);
432 void pa_sink_get_latency_range(pa_sink *s, pa_usec_t *min_latency, pa_usec_t *max_latency);
433 pa_usec_t pa_sink_get_fixed_latency(pa_sink *s);
435 size_t pa_sink_get_max_rewind(pa_sink *s);
436 size_t pa_sink_get_max_request(pa_sink *s);
438 int pa_sink_update_status(pa_sink*s);
439 int pa_sink_suspend(pa_sink *s, bool suspend, pa_suspend_cause_t cause);
440 int pa_sink_suspend_all(pa_core *c, bool suspend, pa_suspend_cause_t cause);
442 /* Use this instead of checking s->flags & PA_SINK_FLAT_VOLUME directly. */
443 bool pa_sink_flat_volume_enabled(pa_sink *s);
445 /* Get the master sink when sharing volumes */
446 pa_sink *pa_sink_get_master(pa_sink *s);
448 bool pa_sink_is_filter(pa_sink *s);
450 /* Is the sink in passthrough mode? (that is, is there a passthrough sink input
451 * connected to this sink? */
452 bool pa_sink_is_passthrough(pa_sink *s);
453 /* These should be called when a sink enters/leaves passthrough mode */
454 void pa_sink_enter_passthrough(pa_sink *s);
455 void pa_sink_leave_passthrough(pa_sink *s);
457 void pa_sink_set_volume(pa_sink *sink, const pa_cvolume *volume, bool sendmsg, bool save);
458 const pa_cvolume *pa_sink_get_volume(pa_sink *sink, bool force_refresh);
460 void pa_sink_set_mute(pa_sink *sink, bool mute, bool save);
461 bool pa_sink_get_mute(pa_sink *sink, bool force_refresh);
463 bool pa_sink_update_proplist(pa_sink *s, pa_update_mode_t mode, pa_proplist *p);
465 int pa_sink_set_port(pa_sink *s, const char *name, bool save);
466 void pa_sink_set_mixer_dirty(pa_sink *s, bool is_dirty);
468 unsigned pa_sink_linked_by(pa_sink *s); /* Number of connected streams */
469 unsigned pa_sink_used_by(pa_sink *s); /* Number of connected streams which are not corked */
471 /* Returns how many streams are active that don't allow suspensions. If
472 * "ignore_input" or "ignore_output" is non-NULL, that stream is not included
473 * in the count (the returned count includes the value from
474 * pa_source_check_suspend(), which is called for the monitor source, so that's
475 * why "ignore_output" may be relevant). */
476 unsigned pa_sink_check_suspend(pa_sink *s, pa_sink_input *ignore_input, pa_source_output *ignore_output);
478 #define pa_sink_get_state(s) ((s)->state)
480 /* Moves all inputs away, and stores them in pa_queue */
481 pa_queue *pa_sink_move_all_start(pa_sink *s, pa_queue *q);
482 void pa_sink_move_all_finish(pa_sink *s, pa_queue *q, bool save);
483 void pa_sink_move_all_fail(pa_queue *q);
485 /* Returns a copy of the sink formats. TODO: Get rid of this function (or at
486 * least get rid of the copying). There's no good reason to copy the formats
487 * every time someone wants to know what formats the sink supports. The formats
488 * idxset could be stored directly in the pa_sink struct.
489 * https://bugs.freedesktop.org/show_bug.cgi?id=71924 */
490 pa_idxset* pa_sink_get_formats(pa_sink *s);
492 bool pa_sink_set_formats(pa_sink *s, pa_idxset *formats);
493 bool pa_sink_check_format(pa_sink *s, pa_format_info *f);
494 pa_idxset* pa_sink_check_formats(pa_sink *s, pa_idxset *in_formats);
496 /*** To be called exclusively by the sink driver, from IO context */
498 void pa_sink_render(pa_sink*s, size_t length, pa_memchunk *result);
499 void pa_sink_render_full(pa_sink *s, size_t length, pa_memchunk *result);
500 void pa_sink_render_into(pa_sink*s, pa_memchunk *target);
501 void pa_sink_render_into_full(pa_sink *s, pa_memchunk *target);
503 void pa_sink_process_rewind(pa_sink *s, size_t nbytes);
505 int pa_sink_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk);
507 void pa_sink_attach_within_thread(pa_sink *s);
508 void pa_sink_detach_within_thread(pa_sink *s);
510 pa_usec_t pa_sink_get_requested_latency_within_thread(pa_sink *s);
512 void pa_sink_set_max_rewind_within_thread(pa_sink *s, size_t max_rewind);
513 void pa_sink_set_max_request_within_thread(pa_sink *s, size_t max_request);
515 void pa_sink_set_latency_range_within_thread(pa_sink *s, pa_usec_t min_latency, pa_usec_t max_latency);
516 void pa_sink_set_fixed_latency_within_thread(pa_sink *s, pa_usec_t latency);
518 void pa_sink_update_volume_and_mute(pa_sink *s);
520 bool pa_sink_volume_change_apply(pa_sink *s, pa_usec_t *usec_to_next);
522 size_t pa_sink_process_input_underruns(pa_sink *s, size_t left_to_play);
524 /*** To be called exclusively by sink input drivers, from IO context */
526 void pa_sink_request_rewind(pa_sink*s, size_t nbytes);
528 void pa_sink_invalidate_requested_latency(pa_sink *s, bool dynamic);
530 int64_t pa_sink_get_latency_within_thread(pa_sink *s, bool allow_negative);
532 /* Called from the main thread, from sink-input.c only. The normal way to set
533 * the sink reference volume is to call pa_sink_set_volume(), but the flat
534 * volume logic in sink-input.c needs also a function that doesn't do all the
535 * extra stuff that pa_sink_set_volume() does. This function simply sets
536 * s->reference_volume and fires change notifications. */
537 void pa_sink_set_reference_volume_direct(pa_sink *s, const pa_cvolume *volume);
539 /* Verify that we called in IO context (aka 'thread context), or that
540 * the sink is not yet set up, i.e. the thread not set up yet. See
541 * pa_assert_io_context() in thread-mq.h for more information. */
542 #define pa_sink_assert_io_context(s) \
543 pa_assert(pa_thread_mq_get() || !PA_SINK_IS_LINKED((s)->state))