1 #ifndef foopulsesourcehfoo
2 #define foopulsesourcehfoo
3
4 /***
5 This file is part of PulseAudio.
6
7 Copyright 2004-2006 Lennart Poettering
8 Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
9
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.
14
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.
19
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/>.
22 ***/
23
24
25 #include <inttypes.h>
26
27 #include <pulsecore/typedefs.h>
28 #include <pulse/def.h>
29 #include <pulse/format.h>
30 #include <pulse/sample.h>
31 #include <pulse/channelmap.h>
32 #include <pulse/volume.h>
33
34 #include <pulsecore/core.h>
35 #include <pulsecore/idxset.h>
36 #include <pulsecore/memchunk.h>
37 #include <pulsecore/sink.h>
38 #include <pulsecore/module.h>
39 #include <pulsecore/asyncmsgq.h>
40 #include <pulsecore/msgobject.h>
41 #include <pulsecore/rtpoll.h>
42 #include <pulsecore/card.h>
43 #include <pulsecore/device-port.h>
44 #include <pulsecore/queue.h>
45 #include <pulsecore/thread-mq.h>
46 #include <pulsecore/source-output.h>
47
48 #define PA_MAX_OUTPUTS_PER_SOURCE 256
49
50 /* Returns true if source is linked: registered and accessible from client side. */
PA_SOURCE_IS_LINKED(pa_source_state_t x)51 static inline bool PA_SOURCE_IS_LINKED(pa_source_state_t x) {
52 return x == PA_SOURCE_RUNNING || x == PA_SOURCE_IDLE || x == PA_SOURCE_SUSPENDED;
53 }
54
55 /* A generic definition for void callback functions */
56 typedef void(*pa_source_cb_t)(pa_source *s);
57
58 typedef int (*pa_source_get_mute_cb_t)(pa_source *s, bool *mute);
59
60 struct pa_source {
61 pa_msgobject parent;
62
63 uint32_t index;
64 pa_core *core;
65
66 pa_source_state_t state;
67
68 /* Set in the beginning of pa_source_unlink() before setting the source
69 * state to UNLINKED. The purpose is to prevent moving streams to a source
70 * that is about to be removed. */
71 bool unlink_requested;
72
73 pa_source_flags_t flags;
74 pa_suspend_cause_t suspend_cause;
75
76 char *name;
77 char *driver; /* may be NULL */
78 pa_proplist *proplist;
79
80 pa_module *module; /* may be NULL */
81 pa_card *card; /* may be NULL */
82
83 pa_sample_spec sample_spec;
84 pa_channel_map channel_map;
85 uint32_t default_sample_rate;
86 uint32_t alternate_sample_rate;
87 bool avoid_resampling:1;
88
89 pa_idxset *outputs;
90 unsigned n_corked;
91 pa_sink *monitor_of; /* may be NULL */
92 pa_source_output *output_from_master; /* non-NULL only for filter sources */
93
94 pa_volume_t base_volume; /* shall be constant */
95 unsigned n_volume_steps; /* shall be constant */
96
97 /* Also see http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/Developer/Volumes/ */
98 pa_cvolume reference_volume; /* The volume exported and taken as reference base for relative source output volumes */
99 pa_cvolume real_volume; /* The volume that the hardware is configured to */
100 pa_cvolume soft_volume; /* The internal software volume we apply to all PCM data while it passes through */
101
102 bool muted:1;
103
104 bool refresh_volume:1;
105 bool refresh_muted:1;
106 bool save_port:1;
107 bool save_volume:1;
108 bool save_muted:1;
109 bool port_changing:1;
110
111 /* Saved volume state while we're in passthrough mode */
112 pa_cvolume saved_volume;
113 bool saved_save_volume:1;
114
115 pa_asyncmsgq *asyncmsgq;
116
117 pa_memchunk silence;
118
119 pa_hashmap *ports;
120 pa_device_port *active_port;
121
122 /* The latency offset is inherited from the currently active port */
123 int64_t port_latency_offset;
124
125 unsigned priority;
126
127 bool set_mute_in_progress;
128
129 /* Callbacks for doing things when the source state and/or suspend cause is
130 * changed. It's fine to set either or both of the callbacks to NULL if the
131 * implementation doesn't have anything to do on state or suspend cause
132 * changes.
133 *
134 * set_state_in_main_thread() is called first. The callback is allowed to
135 * report failure if and only if the source changes its state from
136 * SUSPENDED to IDLE or RUNNING. (FIXME: It would make sense to allow
137 * failure also when changing state from INIT to IDLE or RUNNING, but
138 * currently that will crash pa_source_put().) If
139 * set_state_in_main_thread() fails, set_state_in_io_thread() won't be
140 * called.
141 *
142 * If set_state_in_main_thread() is successful (or not set), then
143 * set_state_in_io_thread() is called. Again, failure is allowed if and
144 * only if the source changes state from SUSPENDED to IDLE or RUNNING. If
145 * set_state_in_io_thread() fails, then set_state_in_main_thread() is
146 * called again, this time with the state parameter set to SUSPENDED and
147 * the suspend_cause parameter set to 0.
148 *
149 * pa_source.state, pa_source.thread_info.state and pa_source.suspend_cause
150 * are updated only after all the callback calls. In case of failure, the
151 * state is set to SUSPENDED and the suspend cause is set to 0. */
152 int (*set_state_in_main_thread)(pa_source *s, pa_source_state_t state, pa_suspend_cause_t suspend_cause); /* may be NULL */
153 int (*set_state_in_io_thread)(pa_source *s, pa_source_state_t state, pa_suspend_cause_t suspend_cause); /* may be NULL */
154
155 /* Called when the volume is queried. Called from main loop
156 * context. If this is NULL a PA_SOURCE_MESSAGE_GET_VOLUME message
157 * will be sent to the IO thread instead. If refresh_volume is
158 * false neither this function is called nor a message is sent.
159 *
160 * You must use the function pa_source_set_get_volume_callback() to
161 * set this callback. */
162 pa_source_cb_t get_volume; /* may be NULL */
163
164 /* Called when the volume shall be changed. Called from main loop
165 * context. If this is NULL a PA_SOURCE_MESSAGE_SET_VOLUME message
166 * will be sent to the IO thread instead.
167 *
168 * You must use the function pa_source_set_set_volume_callback() to
169 * set this callback. */
170 pa_source_cb_t set_volume; /* may be NULL */
171
172 /* Source drivers that set PA_SOURCE_DEFERRED_VOLUME must provide this
173 * callback. This callback is not used with source that do not set
174 * PA_SOURCE_DEFERRED_VOLUME. This is called from the IO thread when a
175 * pending hardware volume change has to be written to the
176 * hardware. The requested volume is passed to the callback
177 * implementation in s->thread_info.current_hw_volume.
178 *
179 * The call is done inside pa_source_volume_change_apply(), which is
180 * not called automatically - it is the driver's responsibility to
181 * schedule that function to be called at the right times in the
182 * IO thread.
183 *
184 * You must use the function pa_source_set_write_volume_callback() to
185 * set this callback. */
186 pa_source_cb_t write_volume; /* may be NULL */
187
188 /* If the source mute can change "spontaneously" (i.e. initiated by the
189 * source implementation, not by someone else calling
190 * pa_source_set_mute()), then the source implementation can notify about
191 * changed mute either by calling pa_source_mute_changed() or by calling
192 * pa_source_get_mute() with force_refresh=true. If the implementation
193 * chooses the latter approach, it should implement the get_mute callback.
194 * Otherwise get_mute can be NULL.
195 *
196 * This is called when pa_source_get_mute() is called with
197 * force_refresh=true. This is called from the IO thread if the
198 * PA_SINK_DEFERRED_VOLUME flag is set, otherwise this is called from the
199 * main thread. On success, the implementation is expected to return 0 and
200 * set the mute parameter that is passed as a reference. On failure, the
201 * implementation is expected to return -1.
202 *
203 * You must use the function pa_source_set_get_mute_callback() to
204 * set this callback. */
205 pa_source_get_mute_cb_t get_mute;
206
207 /* Called when the mute setting shall be changed. Called from main
208 * loop context. If this is NULL a PA_SOURCE_MESSAGE_SET_MUTE
209 * message will be sent to the IO thread instead.
210 *
211 * You must use the function pa_source_set_set_mute_callback() to
212 * set this callback. */
213 pa_source_cb_t set_mute; /* may be NULL */
214
215 /* Called when a the requested latency is changed. Called from IO
216 * thread context. */
217 pa_source_cb_t update_requested_latency; /* may be NULL */
218
219 /* Called whenever the port shall be changed. Called from the main
220 * thread. */
221 int (*set_port)(pa_source *s, pa_device_port *port); /*ditto */
222
223 /* Called to get the list of formats supported by the source, sorted
224 * in descending order of preference. */
225 pa_idxset* (*get_formats)(pa_source *s); /* ditto */
226
227 /* Called whenever device parameters need to be changed. Called from
228 * main thread. */
229 void (*reconfigure)(pa_source *s, pa_sample_spec *spec, bool passthrough);
230
231 /* Contains copies of the above data so that the real-time worker
232 * thread can work without access locking */
233 struct {
234 pa_source_state_t state;
235 pa_hashmap *outputs;
236
237 pa_rtpoll *rtpoll;
238
239 pa_cvolume soft_volume;
240 bool soft_muted:1;
241
242 bool requested_latency_valid:1;
243 pa_usec_t requested_latency;
244
245 /* Then number of bytes this source will be rewound for at
246 * max. (Only used on monitor sources) */
247 size_t max_rewind;
248
249 pa_usec_t min_latency; /* we won't go below this latency */
250 pa_usec_t max_latency; /* An upper limit for the latencies */
251
252 pa_usec_t fixed_latency; /* for sources with PA_SOURCE_DYNAMIC_LATENCY this is 0 */
253
254 /* This latency offset is a direct copy from s->port_latency_offset */
255 int64_t port_latency_offset;
256
257 /* Delayed volume change events are queued here. The events
258 * are stored in expiration order. The one expiring next is in
259 * the head of the list. */
260 PA_LLIST_HEAD(pa_source_volume_change, volume_changes);
261 pa_source_volume_change *volume_changes_tail;
262 /* This value is updated in pa_source_volume_change_apply() and
263 * used only by sources with PA_SOURCE_DEFERRED_VOLUME. */
264 pa_cvolume current_hw_volume;
265
266 /* The amount of usec volume up events are delayed and volume
267 * down events are made earlier. */
268 uint32_t volume_change_safety_margin;
269 /* Usec delay added to all volume change events, may be negative. */
270 int32_t volume_change_extra_delay;
271 } thread_info;
272
273 void *userdata;
274 };
275
276 PA_DECLARE_PUBLIC_CLASS(pa_source);
277 #define PA_SOURCE(s) pa_source_cast(s)
278
279 typedef enum pa_source_message {
280 PA_SOURCE_MESSAGE_ADD_OUTPUT,
281 PA_SOURCE_MESSAGE_REMOVE_OUTPUT,
282 PA_SOURCE_MESSAGE_GET_VOLUME,
283 PA_SOURCE_MESSAGE_SET_SHARED_VOLUME,
284 PA_SOURCE_MESSAGE_SET_VOLUME_SYNCED,
285 PA_SOURCE_MESSAGE_SET_VOLUME,
286 PA_SOURCE_MESSAGE_SYNC_VOLUMES,
287 PA_SOURCE_MESSAGE_GET_MUTE,
288 PA_SOURCE_MESSAGE_SET_MUTE,
289 PA_SOURCE_MESSAGE_GET_LATENCY,
290 PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY,
291 PA_SOURCE_MESSAGE_SET_STATE,
292 PA_SOURCE_MESSAGE_SET_LATENCY_RANGE,
293 PA_SOURCE_MESSAGE_GET_LATENCY_RANGE,
294 PA_SOURCE_MESSAGE_SET_FIXED_LATENCY,
295 PA_SOURCE_MESSAGE_GET_FIXED_LATENCY,
296 PA_SOURCE_MESSAGE_GET_MAX_REWIND,
297 PA_SOURCE_MESSAGE_SET_MAX_REWIND,
298 PA_SOURCE_MESSAGE_UPDATE_VOLUME_AND_MUTE,
299 PA_SOURCE_MESSAGE_SET_PORT_LATENCY_OFFSET,
300 PA_SOURCE_MESSAGE_MAX
301 } pa_source_message_t;
302
303 typedef struct pa_source_new_data {
304 pa_suspend_cause_t suspend_cause;
305
306 char *name;
307 pa_proplist *proplist;
308
309 const char *driver;
310 pa_module *module;
311 pa_card *card;
312
313 pa_hashmap *ports;
314 char *active_port;
315
316 pa_sample_spec sample_spec;
317 pa_channel_map channel_map;
318 uint32_t alternate_sample_rate;
319 bool avoid_resampling:1;
320 pa_cvolume volume;
321 bool muted:1;
322
323 bool volume_is_set:1;
324 bool muted_is_set:1;
325 bool sample_spec_is_set:1;
326 bool channel_map_is_set:1;
327 bool alternate_sample_rate_is_set:1;
328 bool avoid_resampling_is_set:1;
329
330 bool namereg_fail:1;
331
332 bool save_port:1;
333 bool save_volume:1;
334 bool save_muted:1;
335 } pa_source_new_data;
336
337 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data);
338 void pa_source_new_data_set_name(pa_source_new_data *data, const char *name);
339 void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec);
340 void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map);
341 void pa_source_new_data_set_alternate_sample_rate(pa_source_new_data *data, const uint32_t alternate_sample_rate);
342 void pa_source_new_data_set_avoid_resampling(pa_source_new_data *data, bool avoid_resampling);
343 void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume);
344 void pa_source_new_data_set_muted(pa_source_new_data *data, bool mute);
345 void pa_source_new_data_set_port(pa_source_new_data *data, const char *port);
346 void pa_source_new_data_done(pa_source_new_data *data);
347
348 /*** To be called exclusively by the source driver, from main context */
349
350 pa_source* pa_source_new(
351 pa_core *core,
352 pa_source_new_data *data,
353 pa_source_flags_t flags);
354
355 void pa_source_set_get_volume_callback(pa_source *s, pa_source_cb_t cb);
356 void pa_source_set_set_volume_callback(pa_source *s, pa_source_cb_t cb);
357 void pa_source_set_write_volume_callback(pa_source *s, pa_source_cb_t cb);
358 void pa_source_set_get_mute_callback(pa_source *s, pa_source_get_mute_cb_t cb);
359 void pa_source_set_set_mute_callback(pa_source *s, pa_source_cb_t cb);
360 void pa_source_enable_decibel_volume(pa_source *s, bool enable);
361
362 void pa_source_put(pa_source *s);
363 void pa_source_unlink(pa_source *s);
364
365 void pa_source_set_description(pa_source *s, const char *description);
366 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q);
367 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p);
368
369 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind);
370 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency);
371 void pa_source_set_fixed_latency(pa_source *s, pa_usec_t latency);
372
373 void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume);
374 void pa_source_volume_changed(pa_source *s, const pa_cvolume *new_volume);
375 void pa_source_mute_changed(pa_source *s, bool new_muted);
376
377 int pa_source_sync_suspend(pa_source *s);
378
379 void pa_source_update_flags(pa_source *s, pa_source_flags_t mask, pa_source_flags_t value);
380
381 /*** May be called by everyone, from main context */
382
383 void pa_source_set_port_latency_offset(pa_source *s, int64_t offset);
384
385 /* The returned value is supposed to be in the time domain of the sound card! */
386 pa_usec_t pa_source_get_latency(pa_source *s);
387 pa_usec_t pa_source_get_requested_latency(pa_source *s);
388 void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency);
389 pa_usec_t pa_source_get_fixed_latency(pa_source *s);
390
391 size_t pa_source_get_max_rewind(pa_source *s);
392
393 int pa_source_update_status(pa_source*s);
394 int pa_source_suspend(pa_source *s, bool suspend, pa_suspend_cause_t cause);
395 int pa_source_suspend_all(pa_core *c, bool suspend, pa_suspend_cause_t cause);
396
397 /* Use this instead of checking s->flags & PA_SOURCE_FLAT_VOLUME directly. */
398 bool pa_source_flat_volume_enabled(pa_source *s);
399
400 /* Get the master source when sharing volumes */
401 pa_source *pa_source_get_master(pa_source *s);
402
403 bool pa_source_is_filter(pa_source *s);
404
405 /* Is the source in passthrough mode? (that is, is this a monitor source for a sink
406 * that has a passthrough sink input connected to it. */
407 bool pa_source_is_passthrough(pa_source *s);
408 /* These should be called when a source enters/leaves passthrough mode */
409 void pa_source_enter_passthrough(pa_source *s);
410 void pa_source_leave_passthrough(pa_source *s);
411
412 void pa_source_set_volume(pa_source *source, const pa_cvolume *volume, bool sendmsg, bool save);
413 const pa_cvolume *pa_source_get_volume(pa_source *source, bool force_refresh);
414
415 void pa_source_set_mute(pa_source *source, bool mute, bool save);
416 bool pa_source_get_mute(pa_source *source, bool force_refresh);
417
418 bool pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p);
419
420 int pa_source_set_port(pa_source *s, const char *name, bool save);
421
422 void pa_source_reconfigure(pa_source *s, pa_sample_spec *spec, bool passthrough);
423
424 unsigned pa_source_linked_by(pa_source *s); /* Number of connected streams */
425 unsigned pa_source_used_by(pa_source *s); /* Number of connected streams that are not corked */
426
427 /* Returns how many streams are active that don't allow suspensions. If
428 * "ignore" is non-NULL, that stream is not included in the count. */
429 unsigned pa_source_check_suspend(pa_source *s, pa_source_output *ignore);
430
431 const char *pa_source_state_to_string(pa_source_state_t state);
432
433 /* Moves all inputs away, and stores them in pa_queue */
434 pa_queue *pa_source_move_all_start(pa_source *s, pa_queue *q);
435 void pa_source_move_all_finish(pa_source *s, pa_queue *q, bool save);
436 void pa_source_move_all_fail(pa_queue *q);
437
438 /* Returns a copy of the source formats. TODO: Get rid of this function (or at
439 * least get rid of the copying). There's no good reason to copy the formats
440 * every time someone wants to know what formats the source supports. The
441 * formats idxset could be stored directly in the pa_source struct.
442 * https://bugs.freedesktop.org/show_bug.cgi?id=71924 */
443 pa_idxset* pa_source_get_formats(pa_source *s);
444
445 bool pa_source_check_format(pa_source *s, pa_format_info *f);
446 pa_idxset* pa_source_check_formats(pa_source *s, pa_idxset *in_formats);
447
448 void pa_source_set_sample_format(pa_source *s, pa_sample_format_t format);
449 void pa_source_set_sample_rate(pa_source *s, uint32_t rate);
450
451 /*** To be called exclusively by the source driver, from IO context */
452
453 void pa_source_post(pa_source*s, const pa_memchunk *chunk);
454 void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk);
455 void pa_source_process_rewind(pa_source *s, size_t nbytes);
456
457 int pa_source_process_msg(pa_msgobject *o, int code, void *userdata, int64_t, pa_memchunk *chunk);
458
459 void pa_source_attach_within_thread(pa_source *s);
460 void pa_source_detach_within_thread(pa_source *s);
461
462 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s);
463
464 void pa_source_set_max_rewind_within_thread(pa_source *s, size_t max_rewind);
465
466 void pa_source_set_latency_range_within_thread(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency);
467 void pa_source_set_fixed_latency_within_thread(pa_source *s, pa_usec_t latency);
468
469 void pa_source_update_volume_and_mute(pa_source *s);
470
471 bool pa_source_volume_change_apply(pa_source *s, pa_usec_t *usec_to_next);
472
473 /*** To be called exclusively by source output drivers, from IO context */
474
475 void pa_source_invalidate_requested_latency(pa_source *s, bool dynamic);
476 int64_t pa_source_get_latency_within_thread(pa_source *s, bool allow_negative);
477
478 /* Called from the main thread, from source-output.c only. The normal way to
479 * set the source reference volume is to call pa_source_set_volume(), but the
480 * flat volume logic in source-output.c needs also a function that doesn't do
481 * all the extra stuff that pa_source_set_volume() does. This function simply
482 * sets s->reference_volume and fires change notifications. */
483 void pa_source_set_reference_volume_direct(pa_source *s, const pa_cvolume *volume);
484
485 /* When the default_source is changed or the active_port of a source is changed to
486 * PA_AVAILABLE_NO, this function is called to move the streams of the old
487 * default_source or the source with active_port equals PA_AVAILABLE_NO to the
488 * current default_source conditionally*/
489 void pa_source_move_streams_to_default_source(pa_core *core, pa_source *old_source, bool default_source_changed);
490
491 #define pa_source_assert_io_context(s) \
492 pa_assert(pa_thread_mq_get() || !PA_SOURCE_IS_LINKED((s)->state))
493
494 #endif
495