2 This file is part of PulseAudio.
4 Copyright 2011 Colin Guthrie
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2.1 of the License,
9 or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with PulseAudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
26 #include <pulse/timeval.h>
27 #include <pulse/rtclock.h>
28 #include <pulse/i18n.h>
29 #include <pulse/xmalloc.h>
31 #include <pulsecore/macro.h>
32 #include <pulsecore/hashmap.h>
33 #include <pulsecore/hook-list.h>
34 #include <pulsecore/core.h>
35 #include <pulsecore/core-util.h>
36 #include <pulsecore/sink-input.h>
37 #include <pulsecore/modargs.h>
39 #include "module-filter-apply-symdef.h"
41 #define PA_PROP_FILTER_APPLY_MOVING "filter.apply.moving"
43 PA_MODULE_AUTHOR("Colin Guthrie");
44 PA_MODULE_DESCRIPTION("Load filter sinks automatically when needed");
45 PA_MODULE_VERSION(PACKAGE_VERSION);
46 PA_MODULE_LOAD_ONCE(TRUE);
47 PA_MODULE_USAGE(_("autoclean=<automatically unload unused filters?>"));
49 static const char* const valid_modargs[] = {
54 #define DEFAULT_AUTOCLEAN TRUE
55 #define HOUSEKEEPING_INTERVAL (10 * PA_USEC_PER_SEC)
59 uint32_t module_index;
61 pa_object *parent_obj; /* source or sink that the filter is connected to */
62 pa_object *obj; /* source or sink of the filter */
70 *sink_input_move_finish_slot,
71 *sink_input_proplist_slot,
72 *sink_input_unlink_slot,
74 *source_output_put_slot,
75 *source_output_move_finish_slot,
76 *source_output_proplist_slot,
77 *source_output_unlink_slot,
80 pa_time_event *housekeeping_time_event;
83 static unsigned filter_hash(const void *p) {
84 const struct filter *f = p;
87 return (unsigned) (PA_SINK(f->parent_obj)->index + pa_idxset_string_hash_func(f->name));
89 return (unsigned) ((PA_SOURCE(f->parent_obj)->index << 16) + pa_idxset_string_hash_func(f->name));
92 static int filter_compare(const void *a, const void *b) {
93 const struct filter *fa = a, *fb = b;
96 if (fa->parent_obj != fb->parent_obj)
98 if ((r = strcmp(fa->name, fb->name)))
104 static struct filter *filter_new(const char *name, pa_object* parent_obj, pa_bool_t is_sink) {
107 f = pa_xnew(struct filter, 1);
108 f->name = pa_xstrdup(name);
109 pa_assert_se(f->parent_obj = parent_obj);
110 f->is_sink = is_sink;
111 f->module_index = PA_INVALID_INDEX;
116 static void filter_free(struct filter *f) {
123 static const char* should_filter(pa_object *o, pa_bool_t is_sink_input) {
128 pl = PA_SINK_INPUT(o)->proplist;
130 pl = PA_SOURCE_OUTPUT(o)->proplist;
132 /* If the stream doesn't what any filter, then let it be. */
133 if ((apply = pa_proplist_gets(pl, PA_PROP_FILTER_APPLY)) && !pa_streq(apply, "")) {
134 const char* suppress = pa_proplist_gets(pl, PA_PROP_FILTER_SUPPRESS);
136 if (!suppress || !pa_streq(suppress, apply))
143 static pa_bool_t nothing_attached(pa_object *obj, pa_bool_t is_sink)
146 return pa_idxset_isempty(PA_SINK(obj)->inputs);
148 return pa_idxset_isempty(PA_SOURCE(obj)->outputs);
151 static void housekeeping_time_callback(pa_mainloop_api*a, pa_time_event* e, const struct timeval *t, void *userdata) {
152 struct userdata *u = userdata;
153 struct filter *filter;
160 pa_assert(e == u->housekeeping_time_event);
161 u->core->mainloop->time_free(u->housekeeping_time_event);
162 u->housekeeping_time_event = NULL;
164 PA_HASHMAP_FOREACH(filter, u->filters, state) {
165 if (filter->obj && nothing_attached(filter->obj, filter->is_sink)) {
168 pa_log_debug("Detected filter %s as no longer used. Unloading.", filter->name);
169 idx = filter->module_index;
170 pa_hashmap_remove(u->filters, filter);
172 pa_module_unload_request_by_index(u->core, idx, TRUE);
176 pa_log_info("Housekeeping Done.");
179 static void trigger_housekeeping(struct userdata *u) {
185 if (u->housekeeping_time_event)
188 u->housekeeping_time_event = pa_core_rttime_new(u->core, pa_rtclock_now() + HOUSEKEEPING_INTERVAL, housekeeping_time_callback, u);
191 static int do_move(pa_object *obj, pa_object *parent, pa_bool_t restore, pa_bool_t is_input) {
193 return pa_sink_input_move_to(PA_SINK_INPUT(obj), PA_SINK(parent), restore);
195 return pa_source_output_move_to(PA_SOURCE_OUTPUT(obj), PA_SOURCE(parent), restore);
198 static void move_object_for_filter(pa_object *o, struct filter* filter, pa_bool_t restore, pa_bool_t is_sink_input) {
206 pa_assert_se(parent = (restore ? filter->parent_obj : filter->obj));
209 pl = PA_SINK_INPUT(o)->proplist;
210 name = PA_SINK(parent)->name;
212 pl = PA_SOURCE_OUTPUT(o)->proplist;
213 name = PA_SOURCE(parent)->name;
216 pa_proplist_sets(pl, PA_PROP_FILTER_APPLY_MOVING, "1");
218 if (do_move(o, parent, FALSE, is_sink_input) < 0)
219 pa_log_info("Failed to move %s for \"%s\" to <%s>.", is_sink_input ? "sink-input" : "source-output",
220 pa_strnull(pa_proplist_gets(pl, PA_PROP_APPLICATION_NAME)), name);
222 pa_log_info("Sucessfully moved %s for \"%s\" to <%s>.", is_sink_input ? "sink-input" : "source-output",
223 pa_strnull(pa_proplist_gets(pl, PA_PROP_APPLICATION_NAME)), name);
225 pa_proplist_unset(pl, PA_PROP_FILTER_APPLY_MOVING);
228 static void find_filters_for_module(struct userdata *u, pa_module *m, const char *name) {
234 PA_IDXSET_FOREACH(sink, u->core->sinks, idx) {
235 if (sink->module == m) {
236 pa_assert(sink->input_to_master != NULL);
238 fltr = filter_new(name, PA_OBJECT(sink->input_to_master->sink), TRUE);
239 fltr->module_index = m->index;
240 fltr->obj = PA_OBJECT(sink);
242 pa_hashmap_put(u->filters, fltr, fltr);
246 PA_IDXSET_FOREACH(source, u->core->sources, idx) {
247 if (source->module == m && !source->monitor_of) {
248 pa_assert(source->output_from_master != NULL);
250 fltr = filter_new(name, PA_OBJECT(source->output_from_master->source), FALSE);
251 fltr->module_index = m->index;
252 fltr->obj = PA_OBJECT(source);
254 pa_hashmap_put(u->filters, fltr, fltr);
259 static pa_bool_t can_unload_module(struct userdata *u, uint32_t idx) {
261 struct filter *filter;
263 /* Check if any other struct filters point to the same module */
264 PA_HASHMAP_FOREACH(filter, u->filters, state) {
265 if (filter->module_index == idx && !nothing_attached(filter->obj, pa_sink_isinstance(filter->obj)))
272 static pa_hook_result_t process(struct userdata *u, pa_object *o, pa_bool_t is_sink_input) {
274 pa_bool_t done_something = FALSE;
276 pa_object *parent; /* source/sink of the given source-output/sink-input */
277 const char *parent_name;
281 parent = PA_OBJECT(PA_SINK_INPUT(o)->sink);
282 parent_name = PA_SINK_INPUT(o)->sink->name;
283 module = PA_SINK_INPUT(o)->sink->module;
285 parent = PA_OBJECT(PA_SOURCE_OUTPUT(o)->source);
286 parent_name = PA_SOURCE_OUTPUT(o)->source->name;
287 module = PA_SOURCE_OUTPUT(o)->source->module;
290 /* If there is no sink yet, we can't do much */
294 /* If the stream doesn't what any filter, then let it be. */
295 if ((want = should_filter(o, is_sink_input))) {
297 struct filter *fltr, *filter;
299 /* We need to ensure the SI is playing on a sink of this type
300 * attached to the sink it's "officially" playing on */
305 module_name = pa_sprintf_malloc("module-%s", want);
306 if (pa_streq(module->name, module_name)) {
307 pa_log_debug("Stream appears to be playing on an appropriate sink already. Ignoring.");
308 pa_xfree(module_name);
312 fltr = filter_new(want, parent, is_sink_input);
314 if (!(filter = pa_hashmap_get(u->filters, fltr))) {
318 args = pa_sprintf_malloc("autoloaded=1 %s_master=%s", is_sink_input ? "sink" : "source", parent_name);
319 pa_log_debug("Loading %s with arguments '%s'", module_name, args);
321 if ((m = pa_module_load(u->core, module_name, args))) {
322 find_filters_for_module(u, m, want);
323 filter = pa_hashmap_get(u->filters, fltr);
324 done_something = TRUE;
332 pa_log("Unable to load %s for <%s>", module_name, parent_name);
333 pa_xfree(module_name);
336 pa_xfree(module_name);
339 /* We can move the sink_input now as the know the destination.
340 * If this isn't true, we will do it later when the sink appears. */
341 move_object_for_filter(o, filter, FALSE, is_sink_input);
342 done_something = TRUE;
346 struct filter *filter = NULL;
348 /* We do not want to filter... but are we already filtered?
349 * This can happen if an input's proplist changes */
350 PA_HASHMAP_FOREACH(filter, u->filters, state) {
351 if (parent == filter->obj) {
352 move_object_for_filter(o, filter, TRUE, is_sink_input);
353 done_something = TRUE;
360 trigger_housekeeping(u);
365 static pa_hook_result_t sink_input_put_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
366 pa_core_assert_ref(core);
367 pa_sink_input_assert_ref(i);
369 return process(u, PA_OBJECT(i), TRUE);
372 static pa_hook_result_t sink_input_move_finish_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
373 pa_core_assert_ref(core);
374 pa_sink_input_assert_ref(i);
376 if (pa_proplist_gets(i->proplist, PA_PROP_FILTER_APPLY_MOVING))
379 return process(u, PA_OBJECT(i), TRUE);
382 static pa_hook_result_t sink_input_proplist_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
383 pa_core_assert_ref(core);
384 pa_sink_input_assert_ref(i);
386 return process(u, PA_OBJECT(i), TRUE);
389 static pa_hook_result_t sink_input_unlink_cb(pa_core *core, pa_sink_input *i, struct userdata *u) {
390 pa_core_assert_ref(core);
391 pa_sink_input_assert_ref(i);
395 if (pa_hashmap_size(u->filters) > 0)
396 trigger_housekeeping(u);
401 static pa_hook_result_t sink_unlink_cb(pa_core *core, pa_sink *sink, struct userdata *u) {
403 struct filter *filter = NULL;
405 pa_core_assert_ref(core);
406 pa_sink_assert_ref(sink);
409 /* If either the parent or the sink we've loaded disappears,
410 * we should remove it from our hashmap */
411 PA_HASHMAP_FOREACH(filter, u->filters, state) {
412 if (filter->parent_obj == PA_OBJECT(sink) || filter->obj == PA_OBJECT(sink)) {
415 /* Attempt to rescue any streams to the parent sink as this is likely
416 * the best course of action (as opposed to a generic rescue via
417 * module-rescue-streams */
418 if (filter->obj == PA_OBJECT(sink)) {
421 PA_IDXSET_FOREACH(i, sink->inputs, idx)
422 move_object_for_filter(PA_OBJECT(i), filter, TRUE, TRUE);
425 idx = filter->module_index;
426 pa_hashmap_remove(u->filters, filter);
429 if (can_unload_module(u, idx))
430 pa_module_unload_request_by_index(u->core, idx, TRUE);
437 static pa_hook_result_t source_output_put_cb(pa_core *core, pa_source_output *o, struct userdata *u) {
438 pa_core_assert_ref(core);
439 pa_source_output_assert_ref(o);
441 return process(u, PA_OBJECT(o), FALSE);
444 static pa_hook_result_t source_output_move_finish_cb(pa_core *core, pa_source_output *o, struct userdata *u) {
445 pa_core_assert_ref(core);
446 pa_source_output_assert_ref(o);
448 if (pa_proplist_gets(o->proplist, PA_PROP_FILTER_APPLY_MOVING))
451 return process(u, PA_OBJECT(o), FALSE);
454 static pa_hook_result_t source_output_proplist_cb(pa_core *core, pa_source_output *o, struct userdata *u) {
455 pa_core_assert_ref(core);
456 pa_source_output_assert_ref(o);
458 return process(u, PA_OBJECT(o), FALSE);
461 static pa_hook_result_t source_output_unlink_cb(pa_core *core, pa_source_output *o, struct userdata *u) {
462 pa_core_assert_ref(core);
463 pa_source_output_assert_ref(o);
467 if (pa_hashmap_size(u->filters) > 0)
468 trigger_housekeeping(u);
473 static pa_hook_result_t source_unlink_cb(pa_core *core, pa_source *source, struct userdata *u) {
475 struct filter *filter = NULL;
477 pa_core_assert_ref(core);
478 pa_source_assert_ref(source);
481 /* If either the parent or the source we've loaded disappears,
482 * we should remove it from our hashmap */
483 PA_HASHMAP_FOREACH(filter, u->filters, state) {
484 if (filter->parent_obj == PA_OBJECT(source) || filter->obj == PA_OBJECT(source)) {
487 /* Attempt to rescue any streams to the parent source as this is likely
488 * the best course of action (as opposed to a generic rescue via
489 * module-rescue-streams */
490 if (filter->obj == PA_OBJECT(source)) {
493 PA_IDXSET_FOREACH(o, source->outputs, idx)
494 move_object_for_filter(PA_OBJECT(o), filter, TRUE, FALSE);
497 idx = filter->module_index;
498 pa_hashmap_remove(u->filters, filter);
501 if (can_unload_module(u, idx))
502 pa_module_unload_request_by_index(u->core, idx, TRUE);
509 int pa__init(pa_module *m) {
510 pa_modargs *ma = NULL;
515 if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
516 pa_log("Failed to parse module arguments");
520 m->userdata = u = pa_xnew0(struct userdata, 1);
524 u->autoclean = DEFAULT_AUTOCLEAN;
525 if (pa_modargs_get_value_boolean(ma, "autoclean", &u->autoclean) < 0) {
526 pa_log("Failed to parse autoclean value");
530 u->filters = pa_hashmap_new(filter_hash, filter_compare);
532 u->sink_input_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_PUT], PA_HOOK_LATE, (pa_hook_cb_t) sink_input_put_cb, u);
533 u->sink_input_move_finish_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_MOVE_FINISH], PA_HOOK_LATE, (pa_hook_cb_t) sink_input_move_finish_cb, u);
534 u->sink_input_proplist_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_PROPLIST_CHANGED], PA_HOOK_LATE, (pa_hook_cb_t) sink_input_proplist_cb, u);
535 u->sink_input_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) sink_input_unlink_cb, u);
536 u->sink_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) sink_unlink_cb, u);
537 u->source_output_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PUT], PA_HOOK_LATE, (pa_hook_cb_t) source_output_put_cb, u);
538 u->source_output_move_finish_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_MOVE_FINISH], PA_HOOK_LATE, (pa_hook_cb_t) source_output_move_finish_cb, u);
539 u->source_output_proplist_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_PROPLIST_CHANGED], PA_HOOK_LATE, (pa_hook_cb_t) source_output_proplist_cb, u);
540 u->source_output_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) source_output_unlink_cb, u);
541 u->source_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], PA_HOOK_LATE, (pa_hook_cb_t) source_unlink_cb, u);
556 void pa__done(pa_module *m) {
561 if (!(u = m->userdata))
564 if (u->sink_input_put_slot)
565 pa_hook_slot_free(u->sink_input_put_slot);
566 if (u->sink_input_move_finish_slot)
567 pa_hook_slot_free(u->sink_input_move_finish_slot);
568 if (u->sink_input_proplist_slot)
569 pa_hook_slot_free(u->sink_input_proplist_slot);
570 if (u->sink_input_unlink_slot)
571 pa_hook_slot_free(u->sink_input_unlink_slot);
572 if (u->sink_unlink_slot)
573 pa_hook_slot_free(u->sink_unlink_slot);
574 if (u->source_output_put_slot)
575 pa_hook_slot_free(u->source_output_put_slot);
576 if (u->source_output_move_finish_slot)
577 pa_hook_slot_free(u->source_output_move_finish_slot);
578 if (u->source_output_proplist_slot)
579 pa_hook_slot_free(u->source_output_proplist_slot);
580 if (u->source_output_unlink_slot)
581 pa_hook_slot_free(u->source_output_unlink_slot);
582 if (u->source_unlink_slot)
583 pa_hook_slot_free(u->source_unlink_slot);
585 if (u->housekeeping_time_event)
586 u->core->mainloop->time_free(u->housekeeping_time_event);
591 while ((f = pa_hashmap_steal_first(u->filters))) {
592 pa_module_unload_request_by_index(u->core, f->module_index, TRUE);
596 pa_hashmap_free(u->filters, NULL, NULL);