1 #ifndef foopulsesourcehfoo
2 #define foopulsesourcehfoo
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/>.
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>
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>
48 #define PA_MAX_OUTPUTS_PER_SOURCE 256
50 /* Returns true if source is linked: registered and accessible from client side. */
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;
55 /* A generic definition for void callback functions */
56 typedef void(*pa_source_cb_t)(pa_source *s);
58 typedef int (*pa_source_get_mute_cb_t)(pa_source *s, bool *mute);
66 pa_source_state_t state;
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;
73 pa_source_flags_t flags;
74 pa_suspend_cause_t suspend_cause;
77 char *driver; /* may be NULL */
78 pa_proplist *proplist;
80 pa_module *module; /* may be NULL */
81 pa_card *card; /* may be NULL */
83 pa_sample_spec sample_spec;
84 pa_channel_map channel_map;
85 uint32_t default_sample_rate;
86 uint32_t alternate_sample_rate;
90 pa_sink *monitor_of; /* may be NULL */
91 pa_source_output *output_from_master; /* non-NULL only for filter sources */
93 pa_volume_t base_volume; /* shall be constant */
94 unsigned n_volume_steps; /* shall be constant */
96 /* Also see http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/Developer/Volumes/ */
97 pa_cvolume reference_volume; /* The volume exported and taken as reference base for relative source output volumes */
98 pa_cvolume real_volume; /* The volume that the hardware is configured to */
99 pa_cvolume soft_volume; /* The internal software volume we apply to all PCM data while it passes through */
103 bool refresh_volume:1;
104 bool refresh_muted:1;
109 /* Saved volume state while we're in passthrough mode */
110 pa_cvolume saved_volume;
111 bool saved_save_volume: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 /* Callbacks for doing things when the source state and/or suspend cause is
129 * changed. It's fine to set either or both of the callbacks to NULL if the
130 * implementation doesn't have anything to do on state or suspend cause
133 * set_state_in_main_thread() is called first. The callback is allowed to
134 * report failure if and only if the source changes its state from
135 * SUSPENDED to IDLE or RUNNING. (FIXME: It would make sense to allow
136 * failure also when changing state from INIT to IDLE or RUNNING, but
137 * currently that will crash pa_source_put().) If
138 * set_state_in_main_thread() fails, set_state_in_io_thread() won't be
141 * If set_state_in_main_thread() is successful (or not set), then
142 * set_state_in_io_thread() is called. Again, failure is allowed if and
143 * only if the source changes state from SUSPENDED to IDLE or RUNNING. If
144 * set_state_in_io_thread() fails, then set_state_in_main_thread() is
145 * called again, this time with the state parameter set to SUSPENDED and
146 * the suspend_cause parameter set to 0.
148 * pa_source.state, pa_source.thread_info.state and pa_source.suspend_cause
149 * are updated only after all the callback calls. In case of failure, the
150 * state is set to SUSPENDED and the suspend cause is set to 0. */
151 int (*set_state_in_main_thread)(pa_source *s, pa_source_state_t state, pa_suspend_cause_t suspend_cause); /* may be NULL */
152 int (*set_state_in_io_thread)(pa_source *s, pa_source_state_t state, pa_suspend_cause_t suspend_cause); /* may be NULL */
154 /* Called when the volume is queried. Called from main loop
155 * context. If this is NULL a PA_SOURCE_MESSAGE_GET_VOLUME message
156 * will be sent to the IO thread instead. If refresh_volume is
157 * false neither this function is called nor a message is sent.
159 * You must use the function pa_source_set_get_volume_callback() to
160 * set this callback. */
161 pa_source_cb_t get_volume; /* may be NULL */
163 /* Called when the volume shall be changed. Called from main loop
164 * context. If this is NULL a PA_SOURCE_MESSAGE_SET_VOLUME message
165 * will be sent to the IO thread instead.
167 * You must use the function pa_source_set_set_volume_callback() to
168 * set this callback. */
169 pa_source_cb_t set_volume; /* may be NULL */
171 /* Source drivers that set PA_SOURCE_DEFERRED_VOLUME must provide this
172 * callback. This callback is not used with source that do not set
173 * PA_SOURCE_DEFERRED_VOLUME. This is called from the IO thread when a
174 * pending hardware volume change has to be written to the
175 * hardware. The requested volume is passed to the callback
176 * implementation in s->thread_info.current_hw_volume.
178 * The call is done inside pa_source_volume_change_apply(), which is
179 * not called automatically - it is the driver's responsibility to
180 * schedule that function to be called at the right times in the
183 * You must use the function pa_source_set_write_volume_callback() to
184 * set this callback. */
185 pa_source_cb_t write_volume; /* may be NULL */
187 /* If the source mute can change "spontaneously" (i.e. initiated by the
188 * source implementation, not by someone else calling
189 * pa_source_set_mute()), then the source implementation can notify about
190 * changed mute either by calling pa_source_mute_changed() or by calling
191 * pa_source_get_mute() with force_refresh=true. If the implementation
192 * chooses the latter approach, it should implement the get_mute callback.
193 * Otherwise get_mute can be NULL.
195 * This is called when pa_source_get_mute() is called with
196 * force_refresh=true. This is called from the IO thread if the
197 * PA_SINK_DEFERRED_VOLUME flag is set, otherwise this is called from the
198 * main thread. On success, the implementation is expected to return 0 and
199 * set the mute parameter that is passed as a reference. On failure, the
200 * implementation is expected to return -1.
202 * You must use the function pa_source_set_get_mute_callback() to
203 * set this callback. */
204 pa_source_get_mute_cb_t get_mute;
206 /* Called when the mute setting shall be changed. Called from main
207 * loop context. If this is NULL a PA_SOURCE_MESSAGE_SET_MUTE
208 * message will be sent to the IO thread instead.
210 * You must use the function pa_source_set_set_mute_callback() to
211 * set this callback. */
212 pa_source_cb_t set_mute; /* may be NULL */
214 /* Called when a the requested latency is changed. Called from IO
216 pa_source_cb_t update_requested_latency; /* may be NULL */
218 /* Called whenever the port shall be changed. Called from IO
219 * thread if deferred volumes are enabled, and main thread otherwise. */
220 int (*set_port)(pa_source *s, pa_device_port *port); /*ditto */
222 /* Called to get the list of formats supported by the source, sorted
223 * in descending order of preference. */
224 pa_idxset* (*get_formats)(pa_source *s); /* ditto */
226 /* Called whenever device parameters need to be changed. Called from
228 int (*reconfigure)(pa_source *s, pa_sample_spec *spec, bool passthrough);
230 /* Contains copies of the above data so that the real-time worker
231 * thread can work without access locking */
233 pa_source_state_t state;
238 pa_cvolume soft_volume;
241 bool requested_latency_valid:1;
242 pa_usec_t requested_latency;
244 /* Then number of bytes this source will be rewound for at
245 * max. (Only used on monitor sources) */
248 pa_usec_t min_latency; /* we won't go below this latency */
249 pa_usec_t max_latency; /* An upper limit for the latencies */
251 pa_usec_t fixed_latency; /* for sources with PA_SOURCE_DYNAMIC_LATENCY this is 0 */
253 /* This latency offset is a direct copy from s->port_latency_offset */
254 int64_t port_latency_offset;
256 /* Delayed volume change events are queued here. The events
257 * are stored in expiration order. The one expiring next is in
258 * the head of the list. */
259 PA_LLIST_HEAD(pa_source_volume_change, volume_changes);
260 pa_source_volume_change *volume_changes_tail;
261 /* This value is updated in pa_source_volume_change_apply() and
262 * used only by sources with PA_SOURCE_DEFERRED_VOLUME. */
263 pa_cvolume current_hw_volume;
265 /* The amount of usec volume up events are delayed and volume
266 * down events are made earlier. */
267 uint32_t volume_change_safety_margin;
268 /* Usec delay added to all volume change events, may be negative. */
269 int32_t volume_change_extra_delay;
275 PA_DECLARE_PUBLIC_CLASS(pa_source);
276 #define PA_SOURCE(s) pa_source_cast(s)
278 typedef enum pa_source_message {
279 PA_SOURCE_MESSAGE_ADD_OUTPUT,
280 PA_SOURCE_MESSAGE_REMOVE_OUTPUT,
281 PA_SOURCE_MESSAGE_GET_VOLUME,
282 PA_SOURCE_MESSAGE_SET_SHARED_VOLUME,
283 PA_SOURCE_MESSAGE_SET_VOLUME_SYNCED,
284 PA_SOURCE_MESSAGE_SET_VOLUME,
285 PA_SOURCE_MESSAGE_SYNC_VOLUMES,
286 PA_SOURCE_MESSAGE_GET_MUTE,
287 PA_SOURCE_MESSAGE_SET_MUTE,
288 PA_SOURCE_MESSAGE_GET_LATENCY,
289 PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY,
290 PA_SOURCE_MESSAGE_SET_STATE,
291 PA_SOURCE_MESSAGE_SET_LATENCY_RANGE,
292 PA_SOURCE_MESSAGE_GET_LATENCY_RANGE,
293 PA_SOURCE_MESSAGE_SET_FIXED_LATENCY,
294 PA_SOURCE_MESSAGE_GET_FIXED_LATENCY,
295 PA_SOURCE_MESSAGE_GET_MAX_REWIND,
296 PA_SOURCE_MESSAGE_SET_MAX_REWIND,
297 PA_SOURCE_MESSAGE_SET_PORT,
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;
303 typedef struct pa_source_new_data {
304 pa_suspend_cause_t suspend_cause;
307 pa_proplist *proplist;
316 pa_sample_spec sample_spec;
317 pa_channel_map channel_map;
318 uint32_t alternate_sample_rate;
322 bool volume_is_set:1;
324 bool sample_spec_is_set:1;
325 bool channel_map_is_set:1;
326 bool alternate_sample_rate_is_set:1;
333 } pa_source_new_data;
335 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data);
336 void pa_source_new_data_set_name(pa_source_new_data *data, const char *name);
337 void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec);
338 void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map);
339 void pa_source_new_data_set_alternate_sample_rate(pa_source_new_data *data, const uint32_t alternate_sample_rate);
340 void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume);
341 void pa_source_new_data_set_muted(pa_source_new_data *data, bool mute);
342 void pa_source_new_data_set_port(pa_source_new_data *data, const char *port);
343 void pa_source_new_data_done(pa_source_new_data *data);
345 /*** To be called exclusively by the source driver, from main context */
347 pa_source* pa_source_new(
349 pa_source_new_data *data,
350 pa_source_flags_t flags);
352 void pa_source_set_get_volume_callback(pa_source *s, pa_source_cb_t cb);
353 void pa_source_set_set_volume_callback(pa_source *s, pa_source_cb_t cb);
354 void pa_source_set_write_volume_callback(pa_source *s, pa_source_cb_t cb);
355 void pa_source_set_get_mute_callback(pa_source *s, pa_source_get_mute_cb_t cb);
356 void pa_source_set_set_mute_callback(pa_source *s, pa_source_cb_t cb);
357 void pa_source_enable_decibel_volume(pa_source *s, bool enable);
359 void pa_source_put(pa_source *s);
360 void pa_source_unlink(pa_source *s);
362 void pa_source_set_description(pa_source *s, const char *description);
363 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q);
364 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p);
366 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind);
367 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency);
368 void pa_source_set_fixed_latency(pa_source *s, pa_usec_t latency);
370 void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume);
371 void pa_source_volume_changed(pa_source *s, const pa_cvolume *new_volume);
372 void pa_source_mute_changed(pa_source *s, bool new_muted);
374 int pa_source_sync_suspend(pa_source *s);
376 void pa_source_update_flags(pa_source *s, pa_source_flags_t mask, pa_source_flags_t value);
378 /*** May be called by everyone, from main context */
380 void pa_source_set_port_latency_offset(pa_source *s, int64_t offset);
382 /* The returned value is supposed to be in the time domain of the sound card! */
383 pa_usec_t pa_source_get_latency(pa_source *s);
384 pa_usec_t pa_source_get_requested_latency(pa_source *s);
385 void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency);
386 pa_usec_t pa_source_get_fixed_latency(pa_source *s);
388 size_t pa_source_get_max_rewind(pa_source *s);
390 int pa_source_update_status(pa_source*s);
391 int pa_source_suspend(pa_source *s, bool suspend, pa_suspend_cause_t cause);
392 int pa_source_suspend_all(pa_core *c, bool suspend, pa_suspend_cause_t cause);
394 /* Use this instead of checking s->flags & PA_SOURCE_FLAT_VOLUME directly. */
395 bool pa_source_flat_volume_enabled(pa_source *s);
397 /* Get the master source when sharing volumes */
398 pa_source *pa_source_get_master(pa_source *s);
400 bool pa_source_is_filter(pa_source *s);
402 /* Is the source in passthrough mode? (that is, is this a monitor source for a sink
403 * that has a passthrough sink input connected to it. */
404 bool pa_source_is_passthrough(pa_source *s);
405 /* These should be called when a source enters/leaves passthrough mode */
406 void pa_source_enter_passthrough(pa_source *s);
407 void pa_source_leave_passthrough(pa_source *s);
409 void pa_source_set_volume(pa_source *source, const pa_cvolume *volume, bool sendmsg, bool save);
410 const pa_cvolume *pa_source_get_volume(pa_source *source, bool force_refresh);
412 void pa_source_set_mute(pa_source *source, bool mute, bool save);
413 bool pa_source_get_mute(pa_source *source, bool force_refresh);
415 bool pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p);
417 int pa_source_set_port(pa_source *s, const char *name, bool save);
418 void pa_source_set_mixer_dirty(pa_source *s, bool is_dirty);
420 int pa_source_reconfigure(pa_source *s, pa_sample_spec *spec, bool passthrough);
422 unsigned pa_source_linked_by(pa_source *s); /* Number of connected streams */
423 unsigned pa_source_used_by(pa_source *s); /* Number of connected streams that are not corked */
425 /* Returns how many streams are active that don't allow suspensions. If
426 * "ignore" is non-NULL, that stream is not included in the count. */
427 unsigned pa_source_check_suspend(pa_source *s, pa_source_output *ignore);
429 #define pa_source_get_state(s) ((pa_source_state_t) (s)->state)
431 const char *pa_source_state_to_string(pa_source_state_t state);
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);
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);
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);
448 /*** To be called exclusively by the source driver, from IO context */
450 void pa_source_post(pa_source*s, const pa_memchunk *chunk);
451 void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk);
452 void pa_source_process_rewind(pa_source *s, size_t nbytes);
454 int pa_source_process_msg(pa_msgobject *o, int code, void *userdata, int64_t, pa_memchunk *chunk);
456 void pa_source_attach_within_thread(pa_source *s);
457 void pa_source_detach_within_thread(pa_source *s);
459 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s);
461 void pa_source_set_max_rewind_within_thread(pa_source *s, size_t max_rewind);
463 void pa_source_set_latency_range_within_thread(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency);
464 void pa_source_set_fixed_latency_within_thread(pa_source *s, pa_usec_t latency);
466 void pa_source_update_volume_and_mute(pa_source *s);
468 bool pa_source_volume_change_apply(pa_source *s, pa_usec_t *usec_to_next);
470 /*** To be called exclusively by source output drivers, from IO context */
472 void pa_source_invalidate_requested_latency(pa_source *s, bool dynamic);
473 int64_t pa_source_get_latency_within_thread(pa_source *s, bool allow_negative);
475 /* Called from the main thread, from source-output.c only. The normal way to
476 * set the source reference volume is to call pa_source_set_volume(), but the
477 * flat volume logic in source-output.c needs also a function that doesn't do
478 * all the extra stuff that pa_source_set_volume() does. This function simply
479 * sets s->reference_volume and fires change notifications. */
480 void pa_source_set_reference_volume_direct(pa_source *s, const pa_cvolume *volume);
482 #define pa_source_assert_io_context(s) \
483 pa_assert(pa_thread_mq_get() || !PA_SOURCE_IS_LINKED((s)->state))