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/>.
24 typedef struct pa_source pa_source;
25 typedef struct pa_source_volume_change pa_source_volume_change;
29 #include <pulse/def.h>
30 #include <pulse/format.h>
31 #include <pulse/sample.h>
32 #include <pulse/channelmap.h>
33 #include <pulse/volume.h>
35 #include <pulsecore/core.h>
36 #include <pulsecore/idxset.h>
37 #include <pulsecore/memchunk.h>
38 #include <pulsecore/sink.h>
39 #include <pulsecore/module.h>
40 #include <pulsecore/asyncmsgq.h>
41 #include <pulsecore/msgobject.h>
42 #include <pulsecore/rtpoll.h>
43 #include <pulsecore/card.h>
44 #include <pulsecore/device-port.h>
45 #include <pulsecore/queue.h>
46 #include <pulsecore/thread-mq.h>
47 #include <pulsecore/source-output.h>
49 #define PA_MAX_OUTPUTS_PER_SOURCE 256
51 /* Returns true if source is linked: registered and accessible from client side. */
52 static inline bool PA_SOURCE_IS_LINKED(pa_source_state_t x) {
53 return x == PA_SOURCE_RUNNING || x == PA_SOURCE_IDLE || x == PA_SOURCE_SUSPENDED;
56 /* A generic definition for void callback functions */
57 typedef void(*pa_source_cb_t)(pa_source *s);
59 typedef int (*pa_source_get_mute_cb_t)(pa_source *s, bool *mute);
67 pa_source_state_t state;
68 pa_source_flags_t flags;
69 pa_suspend_cause_t suspend_cause;
72 char *driver; /* may be NULL */
73 pa_proplist *proplist;
75 pa_module *module; /* may be NULL */
76 pa_card *card; /* may be NULL */
78 pa_sample_spec sample_spec;
79 pa_channel_map channel_map;
80 uint32_t default_sample_rate;
81 uint32_t alternate_sample_rate;
85 pa_sink *monitor_of; /* may be NULL */
86 pa_source_output *output_from_master; /* non-NULL only for filter sources */
88 pa_volume_t base_volume; /* shall be constant */
89 unsigned n_volume_steps; /* shall be constant */
91 /* Also see http://www.freedesktop.org/wiki/Software/PulseAudio/Documentation/Developer/Volumes/ */
92 pa_cvolume reference_volume; /* The volume exported and taken as reference base for relative source output volumes */
93 pa_cvolume real_volume; /* The volume that the hardware is configured to */
94 pa_cvolume soft_volume; /* The internal software volume we apply to all PCM data while it passes through */
98 bool refresh_volume:1;
104 /* Saved volume state while we're in passthrough mode */
105 pa_cvolume saved_volume;
106 bool saved_save_volume:1;
108 pa_asyncmsgq *asyncmsgq;
113 pa_device_port *active_port;
114 pa_atomic_t mixer_dirty;
116 /* The latency offset is inherited from the currently active port */
117 int64_t latency_offset;
121 bool set_mute_in_progress;
123 /* Called when the main loop requests a state change. Called from
124 * main loop context. If returns -1 the state change will be
126 int (*set_state)(pa_source*source, pa_source_state_t state); /* may be NULL */
128 /* Called when the volume is queried. Called from main loop
129 * context. If this is NULL a PA_SOURCE_MESSAGE_GET_VOLUME message
130 * will be sent to the IO thread instead. If refresh_volume is
131 * false neither this function is called nor a message is sent.
133 * You must use the function pa_source_set_get_volume_callback() to
134 * set this callback. */
135 pa_source_cb_t get_volume; /* may be NULL */
137 /* Called when the volume shall be changed. Called from main loop
138 * context. If this is NULL a PA_SOURCE_MESSAGE_SET_VOLUME message
139 * will be sent to the IO thread instead.
141 * You must use the function pa_source_set_set_volume_callback() to
142 * set this callback. */
143 pa_source_cb_t set_volume; /* may be NULL */
145 /* Source drivers that set PA_SOURCE_DEFERRED_VOLUME must provide this
146 * callback. This callback is not used with source that do not set
147 * PA_SOURCE_DEFERRED_VOLUME. This is called from the IO thread when a
148 * pending hardware volume change has to be written to the
149 * hardware. The requested volume is passed to the callback
150 * implementation in s->thread_info.current_hw_volume.
152 * The call is done inside pa_source_volume_change_apply(), which is
153 * not called automatically - it is the driver's responsibility to
154 * schedule that function to be called at the right times in the
157 * You must use the function pa_source_set_write_volume_callback() to
158 * set this callback. */
159 pa_source_cb_t write_volume; /* may be NULL */
161 /* If the source mute can change "spontaneously" (i.e. initiated by the
162 * source implementation, not by someone else calling
163 * pa_source_set_mute()), then the source implementation can notify about
164 * changed mute either by calling pa_source_mute_changed() or by calling
165 * pa_source_get_mute() with force_refresh=true. If the implementation
166 * chooses the latter approach, it should implement the get_mute callback.
167 * Otherwise get_mute can be NULL.
169 * This is called when pa_source_get_mute() is called with
170 * force_refresh=true. This is called from the IO thread if the
171 * PA_SINK_DEFERRED_VOLUME flag is set, otherwise this is called from the
172 * main thread. On success, the implementation is expected to return 0 and
173 * set the mute parameter that is passed as a reference. On failure, the
174 * implementation is expected to return -1.
176 * You must use the function pa_source_set_get_mute_callback() to
177 * set this callback. */
178 pa_source_get_mute_cb_t get_mute;
180 /* Called when the mute setting shall be changed. Called from main
181 * loop context. If this is NULL a PA_SOURCE_MESSAGE_SET_MUTE
182 * message will be sent to the IO thread instead.
184 * You must use the function pa_source_set_set_mute_callback() to
185 * set this callback. */
186 pa_source_cb_t set_mute; /* may be NULL */
188 /* Called when a the requested latency is changed. Called from IO
190 pa_source_cb_t update_requested_latency; /* may be NULL */
192 /* Called whenever the port shall be changed. Called from IO
193 * thread if deferred volumes are enabled, and main thread otherwise. */
194 int (*set_port)(pa_source *s, pa_device_port *port); /*ditto */
196 /* Called to get the list of formats supported by the source, sorted
197 * in descending order of preference. */
198 pa_idxset* (*get_formats)(pa_source *s); /* ditto */
200 /* Called whenever the sampling frequency shall be changed. Called from
202 int (*update_rate)(pa_source *s, uint32_t rate);
204 /* Contains copies of the above data so that the real-time worker
205 * thread can work without access locking */
207 pa_source_state_t state;
212 pa_cvolume soft_volume;
215 bool requested_latency_valid:1;
216 pa_usec_t requested_latency;
218 /* Then number of bytes this source will be rewound for at
219 * max. (Only used on monitor sources) */
222 pa_usec_t min_latency; /* we won't go below this latency */
223 pa_usec_t max_latency; /* An upper limit for the latencies */
225 pa_usec_t fixed_latency; /* for sources with PA_SOURCE_DYNAMIC_LATENCY this is 0 */
227 /* This latency offset is a direct copy from s->latency_offset */
228 int64_t latency_offset;
230 /* Delayed volume change events are queued here. The events
231 * are stored in expiration order. The one expiring next is in
232 * the head of the list. */
233 PA_LLIST_HEAD(pa_source_volume_change, volume_changes);
234 pa_source_volume_change *volume_changes_tail;
235 /* This value is updated in pa_source_volume_change_apply() and
236 * used only by sources with PA_SOURCE_DEFERRED_VOLUME. */
237 pa_cvolume current_hw_volume;
239 /* The amount of usec volume up events are delayed and volume
240 * down events are made earlier. */
241 uint32_t volume_change_safety_margin;
242 /* Usec delay added to all volume change events, may be negative. */
243 int32_t volume_change_extra_delay;
249 PA_DECLARE_PUBLIC_CLASS(pa_source);
250 #define PA_SOURCE(s) pa_source_cast(s)
252 typedef enum pa_source_message {
253 PA_SOURCE_MESSAGE_ADD_OUTPUT,
254 PA_SOURCE_MESSAGE_REMOVE_OUTPUT,
255 PA_SOURCE_MESSAGE_GET_VOLUME,
256 PA_SOURCE_MESSAGE_SET_SHARED_VOLUME,
257 PA_SOURCE_MESSAGE_SET_VOLUME_SYNCED,
258 PA_SOURCE_MESSAGE_SET_VOLUME,
259 PA_SOURCE_MESSAGE_SYNC_VOLUMES,
260 PA_SOURCE_MESSAGE_GET_MUTE,
261 PA_SOURCE_MESSAGE_SET_MUTE,
262 PA_SOURCE_MESSAGE_GET_LATENCY,
263 PA_SOURCE_MESSAGE_GET_REQUESTED_LATENCY,
264 PA_SOURCE_MESSAGE_SET_STATE,
265 PA_SOURCE_MESSAGE_SET_LATENCY_RANGE,
266 PA_SOURCE_MESSAGE_GET_LATENCY_RANGE,
267 PA_SOURCE_MESSAGE_SET_FIXED_LATENCY,
268 PA_SOURCE_MESSAGE_GET_FIXED_LATENCY,
269 PA_SOURCE_MESSAGE_GET_MAX_REWIND,
270 PA_SOURCE_MESSAGE_SET_MAX_REWIND,
271 PA_SOURCE_MESSAGE_SET_PORT,
272 PA_SOURCE_MESSAGE_UPDATE_VOLUME_AND_MUTE,
273 PA_SOURCE_MESSAGE_SET_LATENCY_OFFSET,
274 PA_SOURCE_MESSAGE_MAX
275 } pa_source_message_t;
277 typedef struct pa_source_new_data {
278 pa_suspend_cause_t suspend_cause;
281 pa_proplist *proplist;
290 pa_sample_spec sample_spec;
291 pa_channel_map channel_map;
292 uint32_t alternate_sample_rate;
296 bool volume_is_set:1;
298 bool sample_spec_is_set:1;
299 bool channel_map_is_set:1;
300 bool alternate_sample_rate_is_set:1;
307 } pa_source_new_data;
309 pa_source_new_data* pa_source_new_data_init(pa_source_new_data *data);
310 void pa_source_new_data_set_name(pa_source_new_data *data, const char *name);
311 void pa_source_new_data_set_sample_spec(pa_source_new_data *data, const pa_sample_spec *spec);
312 void pa_source_new_data_set_channel_map(pa_source_new_data *data, const pa_channel_map *map);
313 void pa_source_new_data_set_alternate_sample_rate(pa_source_new_data *data, const uint32_t alternate_sample_rate);
314 void pa_source_new_data_set_volume(pa_source_new_data *data, const pa_cvolume *volume);
315 void pa_source_new_data_set_muted(pa_source_new_data *data, bool mute);
316 void pa_source_new_data_set_port(pa_source_new_data *data, const char *port);
317 void pa_source_new_data_done(pa_source_new_data *data);
319 /*** To be called exclusively by the source driver, from main context */
321 pa_source* pa_source_new(
323 pa_source_new_data *data,
324 pa_source_flags_t flags);
326 void pa_source_set_get_volume_callback(pa_source *s, pa_source_cb_t cb);
327 void pa_source_set_set_volume_callback(pa_source *s, pa_source_cb_t cb);
328 void pa_source_set_write_volume_callback(pa_source *s, pa_source_cb_t cb);
329 void pa_source_set_get_mute_callback(pa_source *s, pa_source_get_mute_cb_t cb);
330 void pa_source_set_set_mute_callback(pa_source *s, pa_source_cb_t cb);
331 void pa_source_enable_decibel_volume(pa_source *s, bool enable);
333 void pa_source_put(pa_source *s);
334 void pa_source_unlink(pa_source *s);
336 void pa_source_set_description(pa_source *s, const char *description);
337 void pa_source_set_asyncmsgq(pa_source *s, pa_asyncmsgq *q);
338 void pa_source_set_rtpoll(pa_source *s, pa_rtpoll *p);
340 void pa_source_set_max_rewind(pa_source *s, size_t max_rewind);
341 void pa_source_set_latency_range(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency);
342 void pa_source_set_fixed_latency(pa_source *s, pa_usec_t latency);
344 void pa_source_set_soft_volume(pa_source *s, const pa_cvolume *volume);
345 void pa_source_volume_changed(pa_source *s, const pa_cvolume *new_volume);
346 void pa_source_mute_changed(pa_source *s, bool new_muted);
348 int pa_source_sync_suspend(pa_source *s);
350 void pa_source_update_flags(pa_source *s, pa_source_flags_t mask, pa_source_flags_t value);
352 /*** May be called by everyone, from main context */
354 void pa_source_set_latency_offset(pa_source *s, int64_t offset);
356 /* The returned value is supposed to be in the time domain of the sound card! */
357 pa_usec_t pa_source_get_latency(pa_source *s);
358 pa_usec_t pa_source_get_requested_latency(pa_source *s);
359 void pa_source_get_latency_range(pa_source *s, pa_usec_t *min_latency, pa_usec_t *max_latency);
360 pa_usec_t pa_source_get_fixed_latency(pa_source *s);
362 size_t pa_source_get_max_rewind(pa_source *s);
364 int pa_source_update_status(pa_source*s);
365 int pa_source_suspend(pa_source *s, bool suspend, pa_suspend_cause_t cause);
366 int pa_source_suspend_all(pa_core *c, bool suspend, pa_suspend_cause_t cause);
368 /* Use this instead of checking s->flags & PA_SOURCE_FLAT_VOLUME directly. */
369 bool pa_source_flat_volume_enabled(pa_source *s);
371 /* Get the master source when sharing volumes */
372 pa_source *pa_source_get_master(pa_source *s);
374 /* Is the source in passthrough mode? (that is, is this a monitor source for a sink
375 * that has a passthrough sink input connected to it. */
376 bool pa_source_is_passthrough(pa_source *s);
377 /* These should be called when a source enters/leaves passthrough mode */
378 void pa_source_enter_passthrough(pa_source *s);
379 void pa_source_leave_passthrough(pa_source *s);
381 void pa_source_set_volume(pa_source *source, const pa_cvolume *volume, bool sendmsg, bool save);
382 const pa_cvolume *pa_source_get_volume(pa_source *source, bool force_refresh);
384 void pa_source_set_mute(pa_source *source, bool mute, bool save);
385 bool pa_source_get_mute(pa_source *source, bool force_refresh);
387 bool pa_source_update_proplist(pa_source *s, pa_update_mode_t mode, pa_proplist *p);
389 int pa_source_set_port(pa_source *s, const char *name, bool save);
390 void pa_source_set_mixer_dirty(pa_source *s, bool is_dirty);
392 int pa_source_update_rate(pa_source *s, uint32_t rate, bool passthrough);
394 unsigned pa_source_linked_by(pa_source *s); /* Number of connected streams */
395 unsigned pa_source_used_by(pa_source *s); /* Number of connected streams that are not corked */
396 unsigned pa_source_check_suspend(pa_source *s); /* Returns how many streams are active that don't allow suspensions */
397 #define pa_source_get_state(s) ((pa_source_state_t) (s)->state)
399 /* Moves all inputs away, and stores them in pa_queue */
400 pa_queue *pa_source_move_all_start(pa_source *s, pa_queue *q);
401 void pa_source_move_all_finish(pa_source *s, pa_queue *q, bool save);
402 void pa_source_move_all_fail(pa_queue *q);
404 /* Returns a copy of the source formats. TODO: Get rid of this function (or at
405 * least get rid of the copying). There's no good reason to copy the formats
406 * every time someone wants to know what formats the source supports. The
407 * formats idxset could be stored directly in the pa_source struct.
408 * https://bugs.freedesktop.org/show_bug.cgi?id=71924 */
409 pa_idxset* pa_source_get_formats(pa_source *s);
411 bool pa_source_check_format(pa_source *s, pa_format_info *f);
412 pa_idxset* pa_source_check_formats(pa_source *s, pa_idxset *in_formats);
414 /*** To be called exclusively by the source driver, from IO context */
416 void pa_source_post(pa_source*s, const pa_memchunk *chunk);
417 void pa_source_post_direct(pa_source*s, pa_source_output *o, const pa_memchunk *chunk);
418 void pa_source_process_rewind(pa_source *s, size_t nbytes);
420 int pa_source_process_msg(pa_msgobject *o, int code, void *userdata, int64_t, pa_memchunk *chunk);
422 void pa_source_attach_within_thread(pa_source *s);
423 void pa_source_detach_within_thread(pa_source *s);
425 pa_usec_t pa_source_get_requested_latency_within_thread(pa_source *s);
427 void pa_source_set_max_rewind_within_thread(pa_source *s, size_t max_rewind);
429 void pa_source_set_latency_range_within_thread(pa_source *s, pa_usec_t min_latency, pa_usec_t max_latency);
430 void pa_source_set_fixed_latency_within_thread(pa_source *s, pa_usec_t latency);
432 void pa_source_update_volume_and_mute(pa_source *s);
434 bool pa_source_volume_change_apply(pa_source *s, pa_usec_t *usec_to_next);
436 /*** To be called exclusively by source output drivers, from IO context */
438 void pa_source_invalidate_requested_latency(pa_source *s, bool dynamic);
439 pa_usec_t pa_source_get_latency_within_thread(pa_source *s);
441 /* Called from the main thread, from source-output.c only. The normal way to
442 * set the source reference volume is to call pa_source_set_volume(), but the
443 * flat volume logic in source-output.c needs also a function that doesn't do
444 * all the extra stuff that pa_source_set_volume() does. This function simply
445 * sets s->reference_volume and fires change notifications. */
446 void pa_source_set_reference_volume_direct(pa_source *s, const pa_cvolume *volume);
448 #define pa_source_assert_io_context(s) \
449 pa_assert(pa_thread_mq_get() || !PA_SOURCE_IS_LINKED((s)->state))