2 This file is part of PulseAudio.
4 Copyright 2004-2009 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
26 #include <pulse/xmalloc.h>
28 #include <pulsecore/core-error.h>
29 #include <pulsecore/namereg.h>
30 #include <pulsecore/sink.h>
31 #include <pulsecore/module.h>
32 #include <pulsecore/core-util.h>
33 #include <pulsecore/modargs.h>
34 #include <pulsecore/log.h>
35 #include <pulsecore/thread.h>
36 #include <pulsecore/thread-mq.h>
37 #include <pulsecore/rtpoll.h>
39 #include "module-remap-sink-symdef.h"
41 PA_MODULE_AUTHOR("Lennart Poettering");
42 PA_MODULE_DESCRIPTION("Virtual channel remapping sink");
43 PA_MODULE_VERSION(PACKAGE_VERSION);
44 PA_MODULE_LOAD_ONCE(FALSE);
46 "sink_name=<name for the sink> "
47 "sink_properties=<properties for the sink> "
48 "master=<name of sink to remap> "
49 "master_channel_map=<channel map> "
50 "format=<sample format> "
52 "channels=<number of channels> "
53 "channel_map=<channel map> "
54 "remix=<remix channels?>");
60 pa_sink_input *sink_input;
63 static const char* const valid_modargs[] = {
76 /* Called from I/O thread context */
77 static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
78 struct userdata *u = PA_SINK(o)->userdata;
82 case PA_SINK_MESSAGE_GET_LATENCY:
84 /* The sink is _put() before the sink input is, so let's
85 * make sure we don't access it yet */
86 if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
87 !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state)) {
88 *((pa_usec_t*) data) = 0;
92 *((pa_usec_t*) data) =
93 /* Get the latency of the master sink */
94 pa_sink_get_latency_within_thread(u->sink_input->sink) +
96 /* Add the latency internal to our sink input on top */
97 pa_bytes_to_usec(pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq), &u->sink_input->sink->sample_spec);
102 return pa_sink_process_msg(o, code, data, offset, chunk);
105 /* Called from main context */
106 static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
109 pa_sink_assert_ref(s);
110 pa_assert_se(u = s->userdata);
112 if (!PA_SINK_IS_LINKED(state) ||
113 !PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input)))
116 pa_sink_input_cork(u->sink_input, state == PA_SINK_SUSPENDED);
120 /* Called from I/O thread context */
121 static void sink_request_rewind(pa_sink *s) {
124 pa_sink_assert_ref(s);
125 pa_assert_se(u = s->userdata);
127 if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
128 !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state))
131 pa_sink_input_request_rewind(u->sink_input, s->thread_info.rewind_nbytes, TRUE, FALSE, FALSE);
134 /* Called from I/O thread context */
135 static void sink_update_requested_latency(pa_sink *s) {
138 pa_sink_assert_ref(s);
139 pa_assert_se(u = s->userdata);
141 if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
142 !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state))
145 /* Just hand this one over to the master sink */
146 pa_sink_input_set_requested_latency_within_thread(
148 pa_sink_get_requested_latency_within_thread(s));
151 /* Called from I/O thread context */
152 static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
155 pa_sink_input_assert_ref(i);
157 pa_assert_se(u = i->userdata);
159 /* Hmm, process any rewind request that might be queued up */
160 pa_sink_process_rewind(u->sink, 0);
162 pa_sink_render(u->sink, nbytes, chunk);
166 /* Called from I/O thread context */
167 static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
171 pa_sink_input_assert_ref(i);
172 pa_assert_se(u = i->userdata);
174 if (u->sink->thread_info.rewind_nbytes > 0) {
175 amount = PA_MIN(u->sink->thread_info.rewind_nbytes, nbytes);
176 u->sink->thread_info.rewind_nbytes = 0;
179 pa_sink_process_rewind(u->sink, amount);
182 /* Called from I/O thread context */
183 static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
186 pa_sink_input_assert_ref(i);
187 pa_assert_se(u = i->userdata);
189 pa_sink_set_max_rewind_within_thread(u->sink, nbytes);
192 /* Called from I/O thread context */
193 static void sink_input_update_max_request_cb(pa_sink_input *i, size_t nbytes) {
196 pa_sink_input_assert_ref(i);
197 pa_assert_se(u = i->userdata);
199 pa_sink_set_max_request_within_thread(u->sink, nbytes);
202 /* Called from I/O thread context */
203 static void sink_input_update_sink_latency_range_cb(pa_sink_input *i) {
206 pa_sink_input_assert_ref(i);
207 pa_assert_se(u = i->userdata);
209 pa_sink_set_latency_range_within_thread(u->sink, i->sink->thread_info.min_latency, i->sink->thread_info.max_latency);
212 /* Called from I/O thread context */
213 static void sink_input_update_sink_fixed_latency_cb(pa_sink_input *i) {
216 pa_sink_input_assert_ref(i);
217 pa_assert_se(u = i->userdata);
219 pa_sink_set_fixed_latency_within_thread(u->sink, i->sink->thread_info.fixed_latency);
222 /* Called from I/O thread context */
223 static void sink_input_detach_cb(pa_sink_input *i) {
226 pa_sink_input_assert_ref(i);
227 pa_assert_se(u = i->userdata);
229 pa_sink_detach_within_thread(u->sink);
231 pa_sink_set_rtpoll(u->sink, NULL);
234 /* Called from I/O thread context */
235 static void sink_input_attach_cb(pa_sink_input *i) {
238 pa_sink_input_assert_ref(i);
239 pa_assert_se(u = i->userdata);
241 pa_sink_set_rtpoll(u->sink, i->sink->thread_info.rtpoll);
242 pa_sink_set_latency_range_within_thread(u->sink, i->sink->thread_info.min_latency, i->sink->thread_info.max_latency);
243 pa_sink_set_fixed_latency_within_thread(u->sink, i->sink->thread_info.fixed_latency);
244 pa_sink_set_max_request_within_thread(u->sink, pa_sink_input_get_max_request(i));
245 pa_sink_set_max_rewind_within_thread(u->sink, pa_sink_input_get_max_rewind(i));
247 pa_sink_attach_within_thread(u->sink);
250 /* Called from main context */
251 static void sink_input_kill_cb(pa_sink_input *i) {
254 pa_sink_input_assert_ref(i);
255 pa_assert_se(u = i->userdata);
257 /* The order here matters! We first kill the sink input, followed
258 * by the sink. That means the sink callbacks must be protected
259 * against an unconnected sink input! */
260 pa_sink_input_unlink(u->sink_input);
261 pa_sink_unlink(u->sink);
263 pa_sink_input_unref(u->sink_input);
264 u->sink_input = NULL;
266 pa_sink_unref(u->sink);
269 pa_module_unload_request(u->module, TRUE);
272 /* Called from IO thread context */
273 static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) {
276 pa_sink_input_assert_ref(i);
277 pa_assert_se(u = i->userdata);
279 /* If we are added for the first time, ask for a rewinding so that
280 * we are heard right-away. */
281 if (PA_SINK_INPUT_IS_LINKED(state) &&
282 i->thread_info.state == PA_SINK_INPUT_INIT) {
283 pa_log_debug("Requesting rewind due to state change.");
284 pa_sink_input_request_rewind(i, 0, FALSE, TRUE, TRUE);
288 /* Called from main context */
289 static pa_bool_t sink_input_may_move_to_cb(pa_sink_input *i, pa_sink *dest) {
292 pa_sink_input_assert_ref(i);
293 pa_assert_se(u = i->userdata);
295 return u->sink != dest;
298 /* Called from main context */
299 static void sink_input_moving_cb(pa_sink_input *i, pa_sink *dest) {
302 pa_sink_input_assert_ref(i);
303 pa_assert_se(u = i->userdata);
306 pa_sink_set_asyncmsgq(u->sink, dest->asyncmsgq);
307 pa_sink_update_flags(u->sink, PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY, dest->flags);
309 pa_sink_set_asyncmsgq(u->sink, NULL);
312 int pa__init(pa_module*m) {
315 pa_channel_map sink_map, stream_map;
319 pa_sink_input_new_data sink_input_data;
320 pa_sink_new_data sink_data;
321 pa_bool_t remix = TRUE;
325 if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
326 pa_log("Failed to parse module arguments.");
330 if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SINK))) {
331 pa_log("Master sink not found");
335 ss = master->sample_spec;
336 sink_map = master->channel_map;
337 if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &sink_map, PA_CHANNEL_MAP_DEFAULT) < 0) {
338 pa_log("Invalid sample format specification or channel map");
342 stream_map = sink_map;
343 if (pa_modargs_get_channel_map(ma, "master_channel_map", &stream_map) < 0) {
344 pa_log("Invalid master channel map");
348 if (stream_map.channels != ss.channels) {
349 pa_log("Number of channels doesn't match");
353 if (pa_channel_map_equal(&stream_map, &master->channel_map))
354 pa_log_warn("No remapping configured, proceeding nonetheless!");
356 if (pa_modargs_get_value_boolean(ma, "remix", &remix) < 0) {
357 pa_log("Invalid boolean remix parameter");
361 u = pa_xnew0(struct userdata, 1);
366 pa_sink_new_data_init(&sink_data);
367 sink_data.driver = __FILE__;
368 sink_data.module = m;
369 if (!(sink_data.name = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL))))
370 sink_data.name = pa_sprintf_malloc("%s.remapped", master->name);
371 pa_sink_new_data_set_sample_spec(&sink_data, &ss);
372 pa_sink_new_data_set_channel_map(&sink_data, &sink_map);
373 k = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
374 pa_proplist_setf(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Remapped %s", k ? k : master->name);
375 pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
376 pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_CLASS, "filter");
378 if (pa_modargs_get_proplist(ma, "sink_properties", sink_data.proplist, PA_UPDATE_REPLACE) < 0) {
379 pa_log("Invalid properties");
380 pa_sink_new_data_done(&sink_data);
384 u->sink = pa_sink_new(m->core, &sink_data, master->flags & (PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY));
385 pa_sink_new_data_done(&sink_data);
388 pa_log("Failed to create sink.");
392 u->sink->parent.process_msg = sink_process_msg;
393 u->sink->set_state = sink_set_state;
394 u->sink->update_requested_latency = sink_update_requested_latency;
395 u->sink->request_rewind = sink_request_rewind;
396 u->sink->userdata = u;
398 pa_sink_set_asyncmsgq(u->sink, master->asyncmsgq);
400 /* Create sink input */
401 pa_sink_input_new_data_init(&sink_input_data);
402 sink_input_data.driver = __FILE__;
403 sink_input_data.module = m;
404 sink_input_data.sink = master;
405 pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "Remapped Stream");
406 pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "filter");
407 pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
408 pa_sink_input_new_data_set_channel_map(&sink_input_data, &stream_map);
410 pa_sink_input_new(&u->sink_input, m->core, &sink_input_data, (remix ? 0 : PA_SINK_INPUT_NO_REMIX));
411 pa_sink_input_new_data_done(&sink_input_data);
416 u->sink_input->pop = sink_input_pop_cb;
417 u->sink_input->process_rewind = sink_input_process_rewind_cb;
418 u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
419 u->sink_input->update_max_request = sink_input_update_max_request_cb;
420 u->sink_input->update_sink_latency_range = sink_input_update_sink_latency_range_cb;
421 u->sink_input->update_sink_fixed_latency = sink_input_update_sink_fixed_latency_cb;
422 u->sink_input->attach = sink_input_attach_cb;
423 u->sink_input->detach = sink_input_detach_cb;
424 u->sink_input->kill = sink_input_kill_cb;
425 u->sink_input->state_change = sink_input_state_change_cb;
426 u->sink_input->may_move_to = sink_input_may_move_to_cb;
427 u->sink_input->moving = sink_input_moving_cb;
428 u->sink_input->userdata = u;
430 pa_sink_put(u->sink);
431 pa_sink_input_put(u->sink_input);
446 int pa__get_n_used(pa_module *m) {
450 pa_assert_se(u = m->userdata);
452 return pa_sink_linked_by(u->sink);
455 void pa__done(pa_module*m) {
460 if (!(u = m->userdata))
463 /* See comments in sink_input_kill_cb() above regarding
464 * destruction order! */
467 pa_sink_input_unlink(u->sink_input);
470 pa_sink_unlink(u->sink);
473 pa_sink_input_unref(u->sink_input);
476 pa_sink_unref(u->sink);