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/namereg.h>
29 #include <pulsecore/sink.h>
30 #include <pulsecore/module.h>
31 #include <pulsecore/core-util.h>
32 #include <pulsecore/modargs.h>
33 #include <pulsecore/log.h>
34 #include <pulsecore/rtpoll.h>
36 #include "module-remap-sink-symdef.h"
38 PA_MODULE_AUTHOR("Lennart Poettering");
39 PA_MODULE_DESCRIPTION("Virtual channel remapping sink");
40 PA_MODULE_VERSION(PACKAGE_VERSION);
41 PA_MODULE_LOAD_ONCE(FALSE);
43 "sink_name=<name for the sink> "
44 "sink_properties=<properties for the sink> "
45 "master=<name of sink to remap> "
46 "master_channel_map=<channel map> "
47 "format=<sample format> "
49 "channels=<number of channels> "
50 "channel_map=<channel map> "
51 "remix=<remix channels?>");
57 pa_sink_input *sink_input;
62 static const char* const valid_modargs[] = {
75 /* Called from I/O thread context */
76 static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offset, pa_memchunk *chunk) {
77 struct userdata *u = PA_SINK(o)->userdata;
81 case PA_SINK_MESSAGE_GET_LATENCY:
83 /* The sink is _put() before the sink input is, so let's
84 * make sure we don't access it yet */
85 if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
86 !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state)) {
87 *((pa_usec_t*) data) = 0;
91 *((pa_usec_t*) data) =
92 /* Get the latency of the master sink */
93 pa_sink_get_latency_within_thread(u->sink_input->sink) +
95 /* Add the latency internal to our sink input on top */
96 pa_bytes_to_usec(pa_memblockq_get_length(u->sink_input->thread_info.render_memblockq), &u->sink_input->sink->sample_spec);
101 return pa_sink_process_msg(o, code, data, offset, chunk);
104 /* Called from main context */
105 static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
108 pa_sink_assert_ref(s);
109 pa_assert_se(u = s->userdata);
111 if (!PA_SINK_IS_LINKED(state) ||
112 !PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input)))
115 pa_sink_input_cork(u->sink_input, state == PA_SINK_SUSPENDED);
119 /* Called from I/O thread context */
120 static void sink_request_rewind(pa_sink *s) {
123 pa_sink_assert_ref(s);
124 pa_assert_se(u = s->userdata);
126 if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
127 !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state))
130 pa_sink_input_request_rewind(u->sink_input, s->thread_info.rewind_nbytes, TRUE, FALSE, FALSE);
133 /* Called from I/O thread context */
134 static void sink_update_requested_latency(pa_sink *s) {
137 pa_sink_assert_ref(s);
138 pa_assert_se(u = s->userdata);
140 if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
141 !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state))
144 /* Just hand this one over to the master sink */
145 pa_sink_input_set_requested_latency_within_thread(
147 pa_sink_get_requested_latency_within_thread(s));
150 /* Called from I/O thread context */
151 static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
154 pa_sink_input_assert_ref(i);
156 pa_assert_se(u = i->userdata);
158 /* Hmm, process any rewind request that might be queued up */
159 pa_sink_process_rewind(u->sink, 0);
161 pa_sink_render(u->sink, nbytes, chunk);
165 /* Called from I/O thread context */
166 static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
170 pa_sink_input_assert_ref(i);
171 pa_assert_se(u = i->userdata);
173 if (u->sink->thread_info.rewind_nbytes > 0) {
174 amount = PA_MIN(u->sink->thread_info.rewind_nbytes, nbytes);
175 u->sink->thread_info.rewind_nbytes = 0;
178 pa_sink_process_rewind(u->sink, amount);
181 /* Called from I/O thread context */
182 static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
185 pa_sink_input_assert_ref(i);
186 pa_assert_se(u = i->userdata);
188 /* FIXME: Too small max_rewind:
189 * https://bugs.freedesktop.org/show_bug.cgi?id=53709 */
190 pa_sink_set_max_rewind_within_thread(u->sink, nbytes);
193 /* Called from I/O thread context */
194 static void sink_input_update_max_request_cb(pa_sink_input *i, size_t nbytes) {
197 pa_sink_input_assert_ref(i);
198 pa_assert_se(u = i->userdata);
200 pa_sink_set_max_request_within_thread(u->sink, nbytes);
203 /* Called from I/O thread context */
204 static void sink_input_update_sink_latency_range_cb(pa_sink_input *i) {
207 pa_sink_input_assert_ref(i);
208 pa_assert_se(u = i->userdata);
210 pa_sink_set_latency_range_within_thread(u->sink, i->sink->thread_info.min_latency, i->sink->thread_info.max_latency);
213 /* Called from I/O thread context */
214 static void sink_input_update_sink_fixed_latency_cb(pa_sink_input *i) {
217 pa_sink_input_assert_ref(i);
218 pa_assert_se(u = i->userdata);
220 pa_sink_set_fixed_latency_within_thread(u->sink, i->sink->thread_info.fixed_latency);
223 /* Called from I/O thread context */
224 static void sink_input_detach_cb(pa_sink_input *i) {
227 pa_sink_input_assert_ref(i);
228 pa_assert_se(u = i->userdata);
230 pa_sink_detach_within_thread(u->sink);
232 pa_sink_set_rtpoll(u->sink, NULL);
235 /* Called from I/O thread context */
236 static void sink_input_attach_cb(pa_sink_input *i) {
239 pa_sink_input_assert_ref(i);
240 pa_assert_se(u = i->userdata);
242 pa_sink_set_rtpoll(u->sink, i->sink->thread_info.rtpoll);
243 pa_sink_set_latency_range_within_thread(u->sink, i->sink->thread_info.min_latency, i->sink->thread_info.max_latency);
244 pa_sink_set_fixed_latency_within_thread(u->sink, i->sink->thread_info.fixed_latency);
245 pa_sink_set_max_request_within_thread(u->sink, pa_sink_input_get_max_request(i));
247 /* FIXME: Too small max_rewind:
248 * https://bugs.freedesktop.org/show_bug.cgi?id=53709 */
249 pa_sink_set_max_rewind_within_thread(u->sink, pa_sink_input_get_max_rewind(i));
251 pa_sink_attach_within_thread(u->sink);
254 /* Called from main context */
255 static void sink_input_kill_cb(pa_sink_input *i) {
258 pa_sink_input_assert_ref(i);
259 pa_assert_se(u = i->userdata);
261 /* The order here matters! We first kill the sink input, followed
262 * by the sink. That means the sink callbacks must be protected
263 * against an unconnected sink input! */
264 pa_sink_input_unlink(u->sink_input);
265 pa_sink_unlink(u->sink);
267 pa_sink_input_unref(u->sink_input);
268 u->sink_input = NULL;
270 pa_sink_unref(u->sink);
273 pa_module_unload_request(u->module, TRUE);
276 /* Called from IO thread context */
277 static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) {
280 pa_sink_input_assert_ref(i);
281 pa_assert_se(u = i->userdata);
283 /* If we are added for the first time, ask for a rewinding so that
284 * we are heard right-away. */
285 if (PA_SINK_INPUT_IS_LINKED(state) &&
286 i->thread_info.state == PA_SINK_INPUT_INIT) {
287 pa_log_debug("Requesting rewind due to state change.");
288 pa_sink_input_request_rewind(i, 0, FALSE, TRUE, TRUE);
292 /* Called from main context */
293 static pa_bool_t sink_input_may_move_to_cb(pa_sink_input *i, pa_sink *dest) {
296 pa_sink_input_assert_ref(i);
297 pa_assert_se(u = i->userdata);
299 return u->sink != dest;
302 /* Called from main context */
303 static void sink_input_moving_cb(pa_sink_input *i, pa_sink *dest) {
306 pa_sink_input_assert_ref(i);
307 pa_assert_se(u = i->userdata);
310 pa_sink_set_asyncmsgq(u->sink, dest->asyncmsgq);
311 pa_sink_update_flags(u->sink, PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY, dest->flags);
313 pa_sink_set_asyncmsgq(u->sink, NULL);
315 if (u->auto_desc && dest) {
319 pl = pa_proplist_new();
320 k = pa_proplist_gets(dest->proplist, PA_PROP_DEVICE_DESCRIPTION);
321 pa_proplist_setf(pl, PA_PROP_DEVICE_DESCRIPTION, "Remapped %s", k ? k : dest->name);
323 pa_sink_update_proplist(u->sink, PA_UPDATE_REPLACE, pl);
324 pa_proplist_free(pl);
328 int pa__init(pa_module*m) {
331 pa_channel_map sink_map, stream_map;
334 pa_sink_input_new_data sink_input_data;
335 pa_sink_new_data sink_data;
336 pa_bool_t remix = TRUE;
340 if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
341 pa_log("Failed to parse module arguments.");
345 if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SINK))) {
346 pa_log("Master sink not found");
350 ss = master->sample_spec;
351 sink_map = master->channel_map;
352 if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &sink_map, PA_CHANNEL_MAP_DEFAULT) < 0) {
353 pa_log("Invalid sample format specification or channel map");
357 stream_map = sink_map;
358 if (pa_modargs_get_channel_map(ma, "master_channel_map", &stream_map) < 0) {
359 pa_log("Invalid master channel map");
363 if (stream_map.channels != ss.channels) {
364 pa_log("Number of channels doesn't match");
368 if (pa_channel_map_equal(&stream_map, &master->channel_map))
369 pa_log_warn("No remapping configured, proceeding nonetheless!");
371 if (pa_modargs_get_value_boolean(ma, "remix", &remix) < 0) {
372 pa_log("Invalid boolean remix parameter");
376 u = pa_xnew0(struct userdata, 1);
381 pa_sink_new_data_init(&sink_data);
382 sink_data.driver = __FILE__;
383 sink_data.module = m;
384 if (!(sink_data.name = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL))))
385 sink_data.name = pa_sprintf_malloc("%s.remapped", master->name);
386 pa_sink_new_data_set_sample_spec(&sink_data, &ss);
387 pa_sink_new_data_set_channel_map(&sink_data, &sink_map);
388 pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
389 pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_CLASS, "filter");
391 if (pa_modargs_get_proplist(ma, "sink_properties", sink_data.proplist, PA_UPDATE_REPLACE) < 0) {
392 pa_log("Invalid properties");
393 pa_sink_new_data_done(&sink_data);
397 if ((u->auto_desc = !pa_proplist_contains(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION))) {
400 k = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
401 pa_proplist_setf(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Remapped %s", k ? k : master->name);
404 u->sink = pa_sink_new(m->core, &sink_data, master->flags & (PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY));
405 pa_sink_new_data_done(&sink_data);
408 pa_log("Failed to create sink.");
412 u->sink->parent.process_msg = sink_process_msg;
413 u->sink->set_state = sink_set_state;
414 u->sink->update_requested_latency = sink_update_requested_latency;
415 u->sink->request_rewind = sink_request_rewind;
416 u->sink->userdata = u;
418 pa_sink_set_asyncmsgq(u->sink, master->asyncmsgq);
420 /* Create sink input */
421 pa_sink_input_new_data_init(&sink_input_data);
422 sink_input_data.driver = __FILE__;
423 sink_input_data.module = m;
424 pa_sink_input_new_data_set_sink(&sink_input_data, master, FALSE);
425 sink_input_data.origin_sink = u->sink;
426 pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "Remapped Stream");
427 pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "filter");
428 pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
429 pa_sink_input_new_data_set_channel_map(&sink_input_data, &stream_map);
430 sink_input_data.flags = (remix ? 0 : PA_SINK_INPUT_NO_REMIX);
432 pa_sink_input_new(&u->sink_input, m->core, &sink_input_data);
433 pa_sink_input_new_data_done(&sink_input_data);
438 u->sink_input->pop = sink_input_pop_cb;
439 u->sink_input->process_rewind = sink_input_process_rewind_cb;
440 u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
441 u->sink_input->update_max_request = sink_input_update_max_request_cb;
442 u->sink_input->update_sink_latency_range = sink_input_update_sink_latency_range_cb;
443 u->sink_input->update_sink_fixed_latency = sink_input_update_sink_fixed_latency_cb;
444 u->sink_input->attach = sink_input_attach_cb;
445 u->sink_input->detach = sink_input_detach_cb;
446 u->sink_input->kill = sink_input_kill_cb;
447 u->sink_input->state_change = sink_input_state_change_cb;
448 u->sink_input->may_move_to = sink_input_may_move_to_cb;
449 u->sink_input->moving = sink_input_moving_cb;
450 u->sink_input->userdata = u;
452 u->sink->input_to_master = u->sink_input;
454 pa_sink_put(u->sink);
455 pa_sink_input_put(u->sink_input);
470 int pa__get_n_used(pa_module *m) {
474 pa_assert_se(u = m->userdata);
476 return pa_sink_linked_by(u->sink);
479 void pa__done(pa_module*m) {
484 if (!(u = m->userdata))
487 /* See comments in sink_input_kill_cb() above regarding
488 * destruction order! */
491 pa_sink_input_unlink(u->sink_input);
494 pa_sink_unlink(u->sink);
497 pa_sink_input_unref(u->sink_input);
500 pa_sink_unref(u->sink);