2 This file is part of PulseAudio.
4 Copyright 2004-2008 Lennart Poettering
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
29 #include <pulse/rtclock.h>
30 #include <pulse/timeval.h>
31 #include <pulse/xmalloc.h>
33 #include <pulsecore/macro.h>
34 #include <pulsecore/module.h>
35 #include <pulsecore/llist.h>
36 #include <pulsecore/sink.h>
37 #include <pulsecore/sink-input.h>
38 #include <pulsecore/memblockq.h>
39 #include <pulsecore/log.h>
40 #include <pulsecore/core-rtclock.h>
41 #include <pulsecore/core-util.h>
42 #include <pulsecore/modargs.h>
43 #include <pulsecore/namereg.h>
44 #include <pulsecore/thread.h>
45 #include <pulsecore/thread-mq.h>
46 #include <pulsecore/rtpoll.h>
47 #include <pulsecore/time-smoother.h>
48 #include <pulsecore/strlist.h>
50 #include "module-combine-sink-symdef.h"
52 PA_MODULE_AUTHOR("Lennart Poettering");
53 PA_MODULE_DESCRIPTION("Combine multiple sinks to one");
54 PA_MODULE_VERSION(PACKAGE_VERSION);
55 PA_MODULE_LOAD_ONCE(FALSE);
57 "sink_name=<name for the sink> "
58 "sink_properties=<properties for the sink> "
59 "slaves=<slave sinks> "
60 "adjust_time=<how often to readjust rates in s> "
61 "resample_method=<method> "
62 "format=<sample format> "
64 "channels=<number of channels> "
65 "channel_map=<channel map>");
67 #define DEFAULT_SINK_NAME "combined"
69 #define MEMBLOCKQ_MAXLENGTH (1024*1024*16)
71 #define DEFAULT_ADJUST_TIME_USEC (10*PA_USEC_PER_SEC)
73 #define BLOCK_USEC (PA_USEC_PER_MSEC * 200)
75 static const char* const valid_modargs[] = {
89 struct userdata *userdata;
92 pa_sink_input *sink_input;
93 pa_bool_t ignore_state_change;
95 pa_asyncmsgq *inq, /* Message queue from the sink thread to this sink input */
96 *outq; /* Message queue from this sink input to the sink thread */
97 pa_rtpoll_item *inq_rtpoll_item_read, *inq_rtpoll_item_write;
98 pa_rtpoll_item *outq_rtpoll_item_read, *outq_rtpoll_item_write;
100 pa_memblockq *memblockq;
102 /* For communication of the stream latencies to the main thread */
103 pa_usec_t total_latency;
105 /* For communication of the stream parameters to the sink thread */
106 pa_atomic_t max_request;
107 pa_atomic_t requested_latency;
109 PA_LLIST_FIELDS(struct output);
118 pa_thread_mq thread_mq;
121 pa_time_event *time_event;
122 pa_usec_t adjust_time;
127 pa_strlist *unlinked_slaves;
129 pa_hook_slot *sink_put_slot, *sink_unlink_slot, *sink_state_changed_slot;
131 pa_resample_method_t resample_method;
133 pa_usec_t block_usec;
135 pa_idxset* outputs; /* managed in main context */
138 PA_LLIST_HEAD(struct output, active_outputs); /* managed in IO thread context */
139 pa_atomic_t running; /* we cache that value here, so that every thread can query it cheaply */
141 pa_bool_t in_null_mode;
142 pa_smoother *smoother;
148 SINK_MESSAGE_ADD_OUTPUT = PA_SINK_MESSAGE_MAX,
149 SINK_MESSAGE_REMOVE_OUTPUT,
151 SINK_MESSAGE_UPDATE_LATENCY,
152 SINK_MESSAGE_UPDATE_MAX_REQUEST,
153 SINK_MESSAGE_UPDATE_REQUESTED_LATENCY
157 SINK_INPUT_MESSAGE_POST = PA_SINK_INPUT_MESSAGE_MAX,
160 static void output_disable(struct output *o);
161 static void output_enable(struct output *o);
162 static void output_free(struct output *o);
163 static int output_create_sink_input(struct output *o);
165 static void adjust_rates(struct userdata *u) {
167 pa_usec_t max_sink_latency = 0, min_total_latency = (pa_usec_t) -1, target_latency, avg_total_latency = 0;
173 pa_sink_assert_ref(u->sink);
175 if (pa_idxset_size(u->outputs) <= 0)
178 if (!PA_SINK_IS_OPENED(pa_sink_get_state(u->sink)))
181 PA_IDXSET_FOREACH(o, u->outputs, idx) {
182 pa_usec_t sink_latency;
184 if (!o->sink_input || !PA_SINK_IS_OPENED(pa_sink_get_state(o->sink)))
187 o->total_latency = pa_sink_input_get_latency(o->sink_input, &sink_latency);
188 o->total_latency += sink_latency;
190 if (sink_latency > max_sink_latency)
191 max_sink_latency = sink_latency;
193 if (min_total_latency == (pa_usec_t) -1 || o->total_latency < min_total_latency)
194 min_total_latency = o->total_latency;
196 avg_total_latency += o->total_latency;
199 pa_log_debug("[%s] total=%0.2fms sink=%0.2fms ", o->sink->name, (double) o->total_latency / PA_USEC_PER_MSEC, (double) sink_latency / PA_USEC_PER_MSEC);
201 if (o->total_latency > 10*PA_USEC_PER_SEC)
202 pa_log_warn("[%s] Total latency of output is very high (%0.2fms), most likely the audio timing in one of your drivers is broken.", o->sink->name, (double) o->total_latency / PA_USEC_PER_MSEC);
205 if (min_total_latency == (pa_usec_t) -1)
208 avg_total_latency /= n;
210 target_latency = max_sink_latency > min_total_latency ? max_sink_latency : min_total_latency;
212 pa_log_info("[%s] avg total latency is %0.2f msec.", u->sink->name, (double) avg_total_latency / PA_USEC_PER_MSEC);
213 pa_log_info("[%s] target latency is %0.2f msec.", u->sink->name, (double) target_latency / PA_USEC_PER_MSEC);
215 base_rate = u->sink->sample_spec.rate;
217 PA_IDXSET_FOREACH(o, u->outputs, idx) {
218 uint32_t new_rate = base_rate;
219 uint32_t current_rate = o->sink_input->sample_spec.rate;
221 if (!o->sink_input || !PA_SINK_IS_OPENED(pa_sink_get_state(o->sink)))
224 if (o->total_latency != target_latency)
225 new_rate += (uint32_t) (((double) o->total_latency - (double) target_latency) / (double) u->adjust_time * (double) new_rate);
227 if (new_rate < (uint32_t) (base_rate*0.8) || new_rate > (uint32_t) (base_rate*1.25)) {
228 pa_log_warn("[%s] sample rates too different, not adjusting (%u vs. %u).", o->sink_input->sink->name, base_rate, new_rate);
229 new_rate = base_rate;
231 if (base_rate < new_rate + 20 && new_rate < base_rate + 20)
232 new_rate = base_rate;
233 /* Do the adjustment in small steps; 2‰ can be considered inaudible */
234 if (new_rate < (uint32_t) (current_rate*0.998) || new_rate > (uint32_t) (current_rate*1.002)) {
235 pa_log_info("[%s] new rate of %u Hz not within 2‰ of %u Hz, forcing smaller adjustment", o->sink_input->sink->name, new_rate, current_rate);
236 new_rate = PA_CLAMP(new_rate, (uint32_t) (current_rate*0.998), (uint32_t) (current_rate*1.002));
238 pa_log_info("[%s] new rate is %u Hz; ratio is %0.3f; latency is %0.2f msec.", o->sink_input->sink->name, new_rate, (double) new_rate / base_rate, (double) o->total_latency / PA_USEC_PER_MSEC);
240 pa_sink_input_set_rate(o->sink_input, new_rate);
243 pa_asyncmsgq_send(u->sink->asyncmsgq, PA_MSGOBJECT(u->sink), SINK_MESSAGE_UPDATE_LATENCY, NULL, (int64_t) avg_total_latency, NULL);
246 static void time_callback(pa_mainloop_api *a, pa_time_event *e, const struct timeval *t, void *userdata) {
247 struct userdata *u = userdata;
251 pa_assert(u->time_event == e);
255 pa_core_rttime_restart(u->core, e, pa_rtclock_now() + u->adjust_time);
258 static void process_render_null(struct userdata *u, pa_usec_t now) {
262 /* If we are not running, we cannot produce any data */
263 if (!pa_atomic_load(&u->thread_info.running))
266 if (u->thread_info.in_null_mode)
267 u->thread_info.timestamp = now;
269 while (u->thread_info.timestamp < now + u->block_usec) {
272 pa_sink_render(u->sink, u->sink->thread_info.max_request, &chunk);
273 pa_memblock_unref(chunk.memblock);
275 u->thread_info.counter += chunk.length;
277 /* pa_log_debug("Ate %lu bytes.", (unsigned long) chunk.length); */
278 u->thread_info.timestamp += pa_bytes_to_usec(chunk.length, &u->sink->sample_spec);
282 if (ate >= u->sink->thread_info.max_request)
286 /* pa_log_debug("Ate in sum %lu bytes (of %lu)", (unsigned long) ate, (unsigned long) nbytes); */
288 pa_smoother_put(u->thread_info.smoother, now,
289 pa_bytes_to_usec(u->thread_info.counter, &u->sink->sample_spec) - (u->thread_info.timestamp - now));
292 static void thread_func(void *userdata) {
293 struct userdata *u = userdata;
297 pa_log_debug("Thread starting up");
299 if (u->core->realtime_scheduling)
300 pa_make_realtime(u->core->realtime_priority+1);
302 pa_thread_mq_install(&u->thread_mq);
304 u->thread_info.timestamp = pa_rtclock_now();
305 u->thread_info.in_null_mode = FALSE;
310 if (PA_SINK_IS_OPENED(u->sink->thread_info.state))
311 if (u->sink->thread_info.rewind_requested)
312 pa_sink_process_rewind(u->sink, 0);
314 /* If no outputs are connected, render some data and drop it immediately. */
315 if (PA_SINK_IS_OPENED(u->sink->thread_info.state) && !u->thread_info.active_outputs) {
318 now = pa_rtclock_now();
320 if (!u->thread_info.in_null_mode || u->thread_info.timestamp <= now)
321 process_render_null(u, now);
323 pa_rtpoll_set_timer_absolute(u->rtpoll, u->thread_info.timestamp);
324 u->thread_info.in_null_mode = TRUE;
326 pa_rtpoll_set_timer_disabled(u->rtpoll);
327 u->thread_info.in_null_mode = FALSE;
330 /* Hmm, nothing to do. Let's sleep */
331 if ((ret = pa_rtpoll_run(u->rtpoll, TRUE)) < 0) {
332 pa_log_info("pa_rtpoll_run() = %i", ret);
341 /* If this was no regular exit from the loop we have to continue
342 * processing messages until we received PA_MESSAGE_SHUTDOWN */
343 pa_asyncmsgq_post(u->thread_mq.outq, PA_MSGOBJECT(u->core), PA_CORE_MESSAGE_UNLOAD_MODULE, u->module, 0, NULL, NULL);
344 pa_asyncmsgq_wait_for(u->thread_mq.inq, PA_MESSAGE_SHUTDOWN);
347 pa_log_debug("Thread shutting down");
350 /* Called from I/O thread context */
351 static void render_memblock(struct userdata *u, struct output *o, size_t length) {
355 /* We are run by the sink thread, on behalf of an output (o). The
356 * output is waiting for us, hence it is safe to access its
357 * mainblockq and asyncmsgq directly. */
359 /* If we are not running, we cannot produce any data */
360 if (!pa_atomic_load(&u->thread_info.running))
363 /* Maybe there's some data in the requesting output's queue
365 while (pa_asyncmsgq_process_one(o->inq) > 0)
368 /* Ok, now let's prepare some data if we really have to */
369 while (!pa_memblockq_is_readable(o->memblockq)) {
374 pa_sink_render(u->sink, length, &chunk);
376 u->thread_info.counter += chunk.length;
378 /* OK, let's send this data to the other threads */
379 PA_LLIST_FOREACH(j, u->thread_info.active_outputs) {
383 pa_asyncmsgq_post(j->inq, PA_MSGOBJECT(j->sink_input), SINK_INPUT_MESSAGE_POST, NULL, 0, &chunk, NULL);
386 /* And place it directly into the requesting output's queue */
387 pa_memblockq_push_align(o->memblockq, &chunk);
388 pa_memblock_unref(chunk.memblock);
392 /* Called from I/O thread context */
393 static void request_memblock(struct output *o, size_t length) {
395 pa_sink_input_assert_ref(o->sink_input);
396 pa_sink_assert_ref(o->userdata->sink);
398 /* If another thread already prepared some data we received
399 * the data over the asyncmsgq, hence let's first process
401 while (pa_asyncmsgq_process_one(o->inq) > 0)
404 /* Check whether we're now readable */
405 if (pa_memblockq_is_readable(o->memblockq))
408 /* OK, we need to prepare new data, but only if the sink is actually running */
409 if (pa_atomic_load(&o->userdata->thread_info.running))
410 pa_asyncmsgq_send(o->outq, PA_MSGOBJECT(o->userdata->sink), SINK_MESSAGE_NEED, o, (int64_t) length, NULL);
413 /* Called from I/O thread context */
414 static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
417 pa_sink_input_assert_ref(i);
418 pa_assert_se(o = i->userdata);
420 /* If necessary, get some new data */
421 request_memblock(o, nbytes);
423 /* pa_log("%s q size is %u + %u (%u/%u)", */
425 /* pa_memblockq_get_nblocks(o->memblockq), */
426 /* pa_memblockq_get_nblocks(i->thread_info.render_memblockq), */
427 /* pa_memblockq_get_maxrewind(o->memblockq), */
428 /* pa_memblockq_get_maxrewind(i->thread_info.render_memblockq)); */
430 if (pa_memblockq_peek(o->memblockq, chunk) < 0)
433 pa_memblockq_drop(o->memblockq, chunk->length);
438 /* Called from I/O thread context */
439 static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
442 pa_sink_input_assert_ref(i);
443 pa_assert_se(o = i->userdata);
445 pa_memblockq_rewind(o->memblockq, nbytes);
448 /* Called from I/O thread context */
449 static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
452 pa_sink_input_assert_ref(i);
453 pa_assert_se(o = i->userdata);
455 pa_memblockq_set_maxrewind(o->memblockq, nbytes);
458 /* Called from I/O thread context */
459 static void sink_input_update_max_request_cb(pa_sink_input *i, size_t nbytes) {
462 pa_sink_input_assert_ref(i);
463 pa_assert_se(o = i->userdata);
465 if (pa_atomic_load(&o->max_request) == (int) nbytes)
468 pa_atomic_store(&o->max_request, (int) nbytes);
469 pa_asyncmsgq_post(o->outq, PA_MSGOBJECT(o->userdata->sink), SINK_MESSAGE_UPDATE_MAX_REQUEST, NULL, 0, NULL, NULL);
472 /* Called from thread context */
473 static void sink_input_update_sink_requested_latency_cb(pa_sink_input *i) {
479 pa_sink_input_assert_ref(i);
480 pa_assert_se(o = i->userdata);
482 c = pa_sink_get_requested_latency_within_thread(i->sink);
484 if (c == (pa_usec_t) -1)
485 c = i->sink->thread_info.max_latency;
487 if (pa_atomic_load(&o->requested_latency) == (int) c)
490 pa_atomic_store(&o->requested_latency, (int) c);
491 pa_asyncmsgq_post(o->outq, PA_MSGOBJECT(o->userdata->sink), SINK_MESSAGE_UPDATE_REQUESTED_LATENCY, NULL, 0, NULL, NULL);
494 /* Called from I/O thread context */
495 static void sink_input_attach_cb(pa_sink_input *i) {
499 pa_sink_input_assert_ref(i);
500 pa_assert_se(o = i->userdata);
502 /* Set up the queue from the sink thread to us */
503 pa_assert(!o->inq_rtpoll_item_read && !o->outq_rtpoll_item_write);
505 o->inq_rtpoll_item_read = pa_rtpoll_item_new_asyncmsgq_read(
506 i->sink->thread_info.rtpoll,
507 PA_RTPOLL_LATE, /* This one is not that important, since we check for data in _peek() anyway. */
510 o->outq_rtpoll_item_write = pa_rtpoll_item_new_asyncmsgq_write(
511 i->sink->thread_info.rtpoll,
515 pa_sink_input_request_rewind(i, 0, FALSE, TRUE, TRUE);
517 pa_atomic_store(&o->max_request, (int) pa_sink_input_get_max_request(i));
519 c = pa_sink_get_requested_latency_within_thread(i->sink);
520 pa_atomic_store(&o->requested_latency, (int) (c == (pa_usec_t) -1 ? 0 : c));
522 pa_asyncmsgq_post(o->outq, PA_MSGOBJECT(o->userdata->sink), SINK_MESSAGE_UPDATE_MAX_REQUEST, NULL, 0, NULL, NULL);
523 pa_asyncmsgq_post(o->outq, PA_MSGOBJECT(o->userdata->sink), SINK_MESSAGE_UPDATE_REQUESTED_LATENCY, NULL, 0, NULL, NULL);
526 /* Called from I/O thread context */
527 static void sink_input_detach_cb(pa_sink_input *i) {
530 pa_sink_input_assert_ref(i);
531 pa_assert_se(o = i->userdata);
533 if (o->inq_rtpoll_item_read) {
534 pa_rtpoll_item_free(o->inq_rtpoll_item_read);
535 o->inq_rtpoll_item_read = NULL;
538 if (o->outq_rtpoll_item_write) {
539 pa_rtpoll_item_free(o->outq_rtpoll_item_write);
540 o->outq_rtpoll_item_write = NULL;
544 /* Called from main context */
545 static void sink_input_kill_cb(pa_sink_input *i) {
548 pa_sink_input_assert_ref(i);
549 pa_assert_se(o = i->userdata);
551 pa_module_unload_request(o->userdata->module, TRUE);
555 /* Called from thread context */
556 static int sink_input_process_msg(pa_msgobject *obj, int code, void *data, int64_t offset, pa_memchunk *chunk) {
557 struct output *o = PA_SINK_INPUT(obj)->userdata;
561 case PA_SINK_INPUT_MESSAGE_GET_LATENCY: {
564 *r = pa_bytes_to_usec(pa_memblockq_get_length(o->memblockq), &o->sink_input->sample_spec);
566 /* Fall through, the default handler will add in the extra
567 * latency added by the resampler */
571 case SINK_INPUT_MESSAGE_POST:
573 if (PA_SINK_IS_OPENED(o->sink_input->sink->thread_info.state))
574 pa_memblockq_push_align(o->memblockq, chunk);
576 pa_memblockq_flush_write(o->memblockq, TRUE);
581 return pa_sink_input_process_msg(obj, code, data, offset, chunk);
584 /* Called from main context */
585 static void suspend(struct userdata *u) {
591 /* Let's suspend by unlinking all streams */
592 PA_IDXSET_FOREACH(o, u->outputs, idx)
595 pa_log_info("Device suspended...");
598 /* Called from main context */
599 static void unsuspend(struct userdata *u) {
606 PA_IDXSET_FOREACH(o, u->outputs, idx)
609 pa_log_info("Resumed successfully...");
612 /* Called from main context */
613 static int sink_set_state(pa_sink *sink, pa_sink_state_t state) {
616 pa_sink_assert_ref(sink);
617 pa_assert_se(u = sink->userdata);
619 /* Please note that in contrast to the ALSA modules we call
620 * suspend/unsuspend from main context here! */
623 case PA_SINK_SUSPENDED:
624 pa_assert(PA_SINK_IS_OPENED(pa_sink_get_state(u->sink)));
630 case PA_SINK_RUNNING:
632 if (pa_sink_get_state(u->sink) == PA_SINK_SUSPENDED)
637 case PA_SINK_UNLINKED:
639 case PA_SINK_INVALID_STATE:
646 /* Called from IO context */
647 static void update_max_request(struct userdata *u) {
648 size_t max_request = 0;
652 pa_sink_assert_io_context(u->sink);
654 /* Collects the max_request values of all streams and sets the
655 * largest one locally */
657 PA_LLIST_FOREACH(o, u->thread_info.active_outputs) {
658 size_t mr = (size_t) pa_atomic_load(&o->max_request);
660 if (mr > max_request)
664 if (max_request <= 0)
665 max_request = pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec);
667 pa_sink_set_max_request_within_thread(u->sink, max_request);
670 /* Called from IO context */
671 static void update_fixed_latency(struct userdata *u) {
672 pa_usec_t fixed_latency = 0;
676 pa_sink_assert_io_context(u->sink);
678 /* Collects the requested_latency values of all streams and sets
679 * the largest one as fixed_latency locally */
681 PA_LLIST_FOREACH(o, u->thread_info.active_outputs) {
682 pa_usec_t rl = (size_t) pa_atomic_load(&o->requested_latency);
684 if (rl > fixed_latency)
688 if (fixed_latency <= 0)
689 fixed_latency = u->block_usec;
691 pa_sink_set_fixed_latency_within_thread(u->sink, fixed_latency);
694 /* Called from thread context of the io thread */
695 static void output_add_within_thread(struct output *o) {
697 pa_sink_assert_io_context(o->sink);
699 PA_LLIST_PREPEND(struct output, o->userdata->thread_info.active_outputs, o);
701 pa_assert(!o->outq_rtpoll_item_read && !o->inq_rtpoll_item_write);
703 o->outq_rtpoll_item_read = pa_rtpoll_item_new_asyncmsgq_read(
705 PA_RTPOLL_EARLY-1, /* This item is very important */
707 o->inq_rtpoll_item_write = pa_rtpoll_item_new_asyncmsgq_write(
713 /* Called from thread context of the io thread */
714 static void output_remove_within_thread(struct output *o) {
716 pa_sink_assert_io_context(o->sink);
718 PA_LLIST_REMOVE(struct output, o->userdata->thread_info.active_outputs, o);
720 if (o->outq_rtpoll_item_read) {
721 pa_rtpoll_item_free(o->outq_rtpoll_item_read);
722 o->outq_rtpoll_item_read = NULL;
725 if (o->inq_rtpoll_item_write) {
726 pa_rtpoll_item_free(o->inq_rtpoll_item_write);
727 o->inq_rtpoll_item_write = NULL;
731 /* Called from thread context of the io thread */
732 static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
733 struct userdata *u = PA_SINK(o)->userdata;
737 case PA_SINK_MESSAGE_SET_STATE: {
738 pa_bool_t running = (PA_PTR_TO_UINT(data) == PA_SINK_RUNNING);
740 pa_atomic_store(&u->thread_info.running, running);
743 pa_smoother_resume(u->thread_info.smoother, pa_rtclock_now(), TRUE);
745 pa_smoother_pause(u->thread_info.smoother, pa_rtclock_now());
750 case PA_SINK_MESSAGE_GET_LATENCY: {
751 pa_usec_t x, y, c, *delay = data;
753 x = pa_rtclock_now();
754 y = pa_smoother_get(u->thread_info.smoother, x);
756 c = pa_bytes_to_usec(u->thread_info.counter, &u->sink->sample_spec);
766 case SINK_MESSAGE_ADD_OUTPUT:
767 output_add_within_thread(data);
768 update_max_request(u);
769 update_fixed_latency(u);
772 case SINK_MESSAGE_REMOVE_OUTPUT:
773 output_remove_within_thread(data);
774 update_max_request(u);
775 update_fixed_latency(u);
778 case SINK_MESSAGE_NEED:
779 render_memblock(u, (struct output*) data, (size_t) offset);
782 case SINK_MESSAGE_UPDATE_LATENCY: {
783 pa_usec_t x, y, latency = (pa_usec_t) offset;
785 x = pa_rtclock_now();
786 y = pa_bytes_to_usec(u->thread_info.counter, &u->sink->sample_spec);
793 pa_smoother_put(u->thread_info.smoother, x, y);
797 case SINK_MESSAGE_UPDATE_MAX_REQUEST:
798 update_max_request(u);
801 case SINK_MESSAGE_UPDATE_REQUESTED_LATENCY:
802 update_fixed_latency(u);
806 return pa_sink_process_msg(o, code, data, offset, chunk);
809 static void update_description(struct userdata *u) {
810 pa_bool_t first = TRUE;
820 if (pa_idxset_isempty(u->outputs)) {
821 pa_sink_set_description(u->sink, "Simultaneous output");
825 t = pa_xstrdup("Simultaneous output to");
827 PA_IDXSET_FOREACH(o, u->outputs, idx) {
831 e = pa_sprintf_malloc("%s %s", t, pa_strnull(pa_proplist_gets(o->sink->proplist, PA_PROP_DEVICE_DESCRIPTION)));
834 e = pa_sprintf_malloc("%s, %s", t, pa_strnull(pa_proplist_gets(o->sink->proplist, PA_PROP_DEVICE_DESCRIPTION)));
840 pa_sink_set_description(u->sink, t);
844 static int output_create_sink_input(struct output *o) {
845 pa_sink_input_new_data data;
852 pa_sink_input_new_data_init(&data);
853 pa_sink_input_new_data_set_sink(&data, o->sink, FALSE);
854 data.driver = __FILE__;
855 pa_proplist_setf(data.proplist, PA_PROP_MEDIA_NAME, "Simultaneous output on %s", pa_strnull(pa_proplist_gets(o->sink->proplist, PA_PROP_DEVICE_DESCRIPTION)));
856 pa_proplist_sets(data.proplist, PA_PROP_MEDIA_ROLE, "filter");
857 pa_sink_input_new_data_set_sample_spec(&data, &o->userdata->sink->sample_spec);
858 pa_sink_input_new_data_set_channel_map(&data, &o->userdata->sink->channel_map);
859 data.module = o->userdata->module;
860 data.resample_method = o->userdata->resample_method;
861 data.flags = PA_SINK_INPUT_VARIABLE_RATE|PA_SINK_INPUT_DONT_MOVE|PA_SINK_INPUT_NO_CREATE_ON_SUSPEND;
863 pa_sink_input_new(&o->sink_input, o->userdata->core, &data);
865 pa_sink_input_new_data_done(&data);
870 o->sink_input->parent.process_msg = sink_input_process_msg;
871 o->sink_input->pop = sink_input_pop_cb;
872 o->sink_input->process_rewind = sink_input_process_rewind_cb;
873 o->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
874 o->sink_input->update_max_request = sink_input_update_max_request_cb;
875 o->sink_input->update_sink_requested_latency = sink_input_update_sink_requested_latency_cb;
876 o->sink_input->attach = sink_input_attach_cb;
877 o->sink_input->detach = sink_input_detach_cb;
878 o->sink_input->kill = sink_input_kill_cb;
879 o->sink_input->userdata = o;
881 pa_sink_input_set_requested_latency(o->sink_input, BLOCK_USEC);
886 /* Called from main context */
887 static struct output *output_new(struct userdata *u, pa_sink *sink) {
894 o = pa_xnew0(struct output, 1);
896 o->inq = pa_asyncmsgq_new(0);
897 o->outq = pa_asyncmsgq_new(0);
899 o->memblockq = pa_memblockq_new(
900 "module-combine-sink output memblockq",
904 &u->sink->sample_spec,
910 pa_assert_se(pa_idxset_put(u->outputs, o, NULL) == 0);
911 update_description(u);
916 /* Called from main context */
917 static void output_free(struct output *o) {
922 pa_assert_se(pa_idxset_remove_by_data(o->userdata->outputs, o, NULL));
923 update_description(o->userdata);
925 if (o->inq_rtpoll_item_read)
926 pa_rtpoll_item_free(o->inq_rtpoll_item_read);
927 if (o->inq_rtpoll_item_write)
928 pa_rtpoll_item_free(o->inq_rtpoll_item_write);
930 if (o->outq_rtpoll_item_read)
931 pa_rtpoll_item_free(o->outq_rtpoll_item_read);
932 if (o->outq_rtpoll_item_write)
933 pa_rtpoll_item_free(o->outq_rtpoll_item_write);
936 pa_asyncmsgq_unref(o->inq);
939 pa_asyncmsgq_unref(o->outq);
942 pa_memblockq_free(o->memblockq);
947 /* Called from main context */
948 static void output_enable(struct output *o) {
954 /* This might cause the sink to be resumed. The state change hook
955 * of the sink might hence be called from here, which might then
956 * cause us to be called in a loop. Make sure that state changes
957 * for this output don't cause this loop by setting a flag here */
958 o->ignore_state_change = TRUE;
960 if (output_create_sink_input(o) >= 0) {
962 if (pa_sink_get_state(o->sink) != PA_SINK_INIT) {
964 /* First we register the output. That means that the sink
965 * will start to pass data to this output. */
966 pa_asyncmsgq_send(o->userdata->sink->asyncmsgq, PA_MSGOBJECT(o->userdata->sink), SINK_MESSAGE_ADD_OUTPUT, o, 0, NULL);
968 /* Then we enable the sink input. That means that the sink
969 * is now asked for new data. */
970 pa_sink_input_put(o->sink_input);
973 /* Hmm the sink is not yet started, do things right here */
974 output_add_within_thread(o);
977 o->ignore_state_change = FALSE;
980 /* Called from main context */
981 static void output_disable(struct output *o) {
987 /* First we disable the sink input. That means that the sink is
988 * not asked for new data anymore */
989 pa_sink_input_unlink(o->sink_input);
991 /* Then we unregister the output. That means that the sink doesn't
992 * pass any further data to this output */
993 pa_asyncmsgq_send(o->userdata->sink->asyncmsgq, PA_MSGOBJECT(o->userdata->sink), SINK_MESSAGE_REMOVE_OUTPUT, o, 0, NULL);
995 /* Now deallocate the stream */
996 pa_sink_input_unref(o->sink_input);
997 o->sink_input = NULL;
999 /* Finally, drop all queued data */
1000 pa_memblockq_flush_write(o->memblockq, TRUE);
1001 pa_asyncmsgq_flush(o->inq, FALSE);
1002 pa_asyncmsgq_flush(o->outq, FALSE);
1005 /* Called from main context */
1006 static void output_verify(struct output *o) {
1009 if (PA_SINK_IS_OPENED(pa_sink_get_state(o->userdata->sink)))
1015 /* Called from main context */
1016 static pa_bool_t is_suitable_sink(struct userdata *u, pa_sink *s) {
1019 pa_sink_assert_ref(s);
1024 if (!(s->flags & PA_SINK_HARDWARE))
1027 if (!(s->flags & PA_SINK_LATENCY))
1030 if ((t = pa_proplist_gets(s->proplist, PA_PROP_DEVICE_CLASS)))
1031 if (!pa_streq(t, "sound"))
1037 /* Called from main context */
1038 static pa_hook_result_t sink_put_hook_cb(pa_core *c, pa_sink *s, struct userdata* u) {
1041 pa_core_assert_ref(c);
1042 pa_sink_assert_ref(s);
1046 if (!is_suitable_sink(u, s))
1049 /* Check if the sink is a previously unlinked slave (non-automatic mode) */
1050 pa_strlist *l = u->unlinked_slaves;
1052 while (l && !pa_streq(pa_strlist_data(l), s->name))
1053 l = pa_strlist_next(l);
1058 u->unlinked_slaves = pa_strlist_remove(u->unlinked_slaves, s->name);
1061 pa_log_info("Configuring new sink: %s", s->name);
1062 if (!(o = output_new(u, s))) {
1063 pa_log("Failed to create sink input on sink '%s'.", s->name);
1072 /* Called from main context */
1073 static struct output* find_output(struct userdata *u, pa_sink *s) {
1083 PA_IDXSET_FOREACH(o, u->outputs, idx)
1090 /* Called from main context */
1091 static pa_hook_result_t sink_unlink_hook_cb(pa_core *c, pa_sink *s, struct userdata* u) {
1095 pa_sink_assert_ref(s);
1098 if (!(o = find_output(u, s)))
1101 pa_log_info("Unconfiguring sink: %s", s->name);
1104 u->unlinked_slaves = pa_strlist_prepend(u->unlinked_slaves, s->name);
1111 /* Called from main context */
1112 static pa_hook_result_t sink_state_changed_hook_cb(pa_core *c, pa_sink *s, struct userdata* u) {
1115 if (!(o = find_output(u, s)))
1118 /* This state change might be triggered because we are creating a
1119 * stream here, in that case we don't want to create it a second
1120 * time here and enter a loop */
1121 if (o->ignore_state_change)
1129 int pa__init(pa_module*m) {
1131 pa_modargs *ma = NULL;
1132 const char *slaves, *rm;
1133 int resample_method = PA_RESAMPLER_TRIVIAL;
1138 pa_sink_new_data data;
1139 uint32_t adjust_time_sec;
1143 if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
1144 pa_log("failed to parse module arguments");
1148 if ((rm = pa_modargs_get_value(ma, "resample_method", NULL))) {
1149 if ((resample_method = pa_parse_resample_method(rm)) < 0) {
1150 pa_log("invalid resample method '%s'", rm);
1155 m->userdata = u = pa_xnew0(struct userdata, 1);
1158 u->rtpoll = pa_rtpoll_new();
1159 pa_thread_mq_init(&u->thread_mq, m->core->mainloop, u->rtpoll);
1160 u->resample_method = resample_method;
1161 u->outputs = pa_idxset_new(NULL, NULL);
1162 u->thread_info.smoother = pa_smoother_new(
1171 adjust_time_sec = DEFAULT_ADJUST_TIME_USEC / PA_USEC_PER_SEC;
1172 if (pa_modargs_get_value_u32(ma, "adjust_time", &adjust_time_sec) < 0) {
1173 pa_log("Failed to parse adjust_time value");
1177 if (adjust_time_sec != DEFAULT_ADJUST_TIME_USEC / PA_USEC_PER_SEC)
1178 u->adjust_time = adjust_time_sec * PA_USEC_PER_SEC;
1180 u->adjust_time = DEFAULT_ADJUST_TIME_USEC;
1182 slaves = pa_modargs_get_value(ma, "slaves", NULL);
1183 u->automatic = !slaves;
1185 ss = m->core->default_sample_spec;
1186 map = m->core->default_channel_map;
1188 /* Check the specified slave sinks for sample_spec and channel_map to use for the combined sink */
1189 if (!u->automatic) {
1190 const char*split_state = NULL;
1192 pa_sample_spec slaves_spec;
1193 pa_channel_map slaves_map;
1194 pa_bool_t is_first_slave = TRUE;
1196 pa_sample_spec_init(&slaves_spec);
1198 while ((n = pa_split(slaves, ",", &split_state))) {
1199 pa_sink *slave_sink;
1201 if (!(slave_sink = pa_namereg_get(m->core, n, PA_NAMEREG_SINK))) {
1202 pa_log("Invalid slave sink '%s'", n);
1209 if (is_first_slave) {
1210 slaves_spec = slave_sink->sample_spec;
1211 slaves_map = slave_sink->channel_map;
1212 is_first_slave = FALSE;
1214 if (slaves_spec.format != slave_sink->sample_spec.format)
1215 slaves_spec.format = PA_SAMPLE_INVALID;
1217 if (slaves_spec.rate < slave_sink->sample_spec.rate)
1218 slaves_spec.rate = slave_sink->sample_spec.rate;
1220 if (!pa_channel_map_equal(&slaves_map, &slave_sink->channel_map))
1221 slaves_spec.channels = 0;
1225 if (!is_first_slave) {
1226 if (slaves_spec.format != PA_SAMPLE_INVALID)
1227 ss.format = slaves_spec.format;
1229 ss.rate = slaves_spec.rate;
1231 if (slaves_spec.channels > 0) {
1233 ss.channels = slaves_map.channels;
1238 if ((pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &map, PA_CHANNEL_MAP_DEFAULT) < 0)) {
1239 pa_log("Invalid sample specification.");
1243 pa_sink_new_data_init(&data);
1244 data.namereg_fail = FALSE;
1245 data.driver = __FILE__;
1247 pa_sink_new_data_set_name(&data, pa_modargs_get_value(ma, "sink_name", DEFAULT_SINK_NAME));
1248 pa_sink_new_data_set_sample_spec(&data, &ss);
1249 pa_sink_new_data_set_channel_map(&data, &map);
1250 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_CLASS, "filter");
1253 pa_proplist_sets(data.proplist, "combine.slaves", slaves);
1255 if (pa_modargs_get_proplist(ma, "sink_properties", data.proplist, PA_UPDATE_REPLACE) < 0) {
1256 pa_log("Invalid properties");
1257 pa_sink_new_data_done(&data);
1261 /* Check proplist for a description & fill in a default value if not */
1262 u->auto_desc = FALSE;
1263 if (NULL == pa_proplist_gets(data.proplist, PA_PROP_DEVICE_DESCRIPTION)) {
1264 u->auto_desc = TRUE;
1265 pa_proplist_sets(data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Simultaneous Output");
1268 u->sink = pa_sink_new(m->core, &data, PA_SINK_LATENCY);
1269 pa_sink_new_data_done(&data);
1272 pa_log("Failed to create sink");
1276 u->sink->parent.process_msg = sink_process_msg;
1277 u->sink->set_state = sink_set_state;
1278 u->sink->userdata = u;
1280 pa_sink_set_rtpoll(u->sink, u->rtpoll);
1281 pa_sink_set_asyncmsgq(u->sink, u->thread_mq.inq);
1283 u->block_usec = BLOCK_USEC;
1284 pa_sink_set_max_request(u->sink, pa_usec_to_bytes(u->block_usec, &u->sink->sample_spec));
1286 if (!u->automatic) {
1287 const char*split_state;
1291 /* The slaves have been specified manually */
1294 while ((n = pa_split(slaves, ",", &split_state))) {
1295 pa_sink *slave_sink;
1297 if (!(slave_sink = pa_namereg_get(m->core, n, PA_NAMEREG_SINK)) || slave_sink == u->sink) {
1298 pa_log("Invalid slave sink '%s'", n);
1305 if (!output_new(u, slave_sink)) {
1306 pa_log("Failed to create slave sink input on sink '%s'.", slave_sink->name);
1311 if (pa_idxset_size(u->outputs) <= 1)
1312 pa_log_warn("No slave sinks specified.");
1314 u->sink_put_slot = NULL;
1319 /* We're in automatic mode, we add every sink that matches our needs */
1321 PA_IDXSET_FOREACH(s, m->core->sinks, idx) {
1323 if (!is_suitable_sink(u, s))
1326 if (!output_new(u, s)) {
1327 pa_log("Failed to create sink input on sink '%s'.", s->name);
1333 u->sink_put_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_PUT], PA_HOOK_LATE, (pa_hook_cb_t) sink_put_hook_cb, u);
1334 u->sink_unlink_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_EARLY, (pa_hook_cb_t) sink_unlink_hook_cb, u);
1335 u->sink_state_changed_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_STATE_CHANGED], PA_HOOK_NORMAL, (pa_hook_cb_t) sink_state_changed_hook_cb, u);
1337 if (!(u->thread = pa_thread_new("combine", thread_func, u))) {
1338 pa_log("Failed to create thread.");
1342 /* Activate the sink and the sink inputs */
1343 pa_sink_put(u->sink);
1345 PA_IDXSET_FOREACH(o, u->outputs, idx)
1348 if (u->adjust_time > 0)
1349 u->time_event = pa_core_rttime_new(m->core, pa_rtclock_now() + u->adjust_time, time_callback, u);
1351 pa_modargs_free(ma);
1358 pa_modargs_free(ma);
1365 void pa__done(pa_module*m) {
1371 if (!(u = m->userdata))
1374 pa_strlist_free(u->unlinked_slaves);
1376 if (u->sink_put_slot)
1377 pa_hook_slot_free(u->sink_put_slot);
1379 if (u->sink_unlink_slot)
1380 pa_hook_slot_free(u->sink_unlink_slot);
1382 if (u->sink_state_changed_slot)
1383 pa_hook_slot_free(u->sink_state_changed_slot);
1386 while ((o = pa_idxset_first(u->outputs, NULL)))
1389 pa_idxset_free(u->outputs, NULL, NULL);
1393 pa_sink_unlink(u->sink);
1396 pa_asyncmsgq_send(u->thread_mq.inq, NULL, PA_MESSAGE_SHUTDOWN, NULL, 0, NULL);
1397 pa_thread_free(u->thread);
1400 pa_thread_mq_done(&u->thread_mq);
1403 pa_sink_unref(u->sink);
1406 pa_rtpoll_free(u->rtpoll);
1409 u->core->mainloop->time_free(u->time_event);
1411 if (u->thread_info.smoother)
1412 pa_smoother_free(u->thread_info.smoother);