code.delx.au - pulseaudio/blob - src/modules/module-remap-sink.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2009 Lennart Poettering
   5
   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.
  10
  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.
  15
  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
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <pulse/xmalloc.h>
  27
  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>
  38
  39 #include "module-remap-sink-symdef.h"
  40
  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);
  45 PA_MODULE_USAGE(
  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> "
  51         "rate=<sample rate> "
  52         "channels=<number of channels> "
  53         "channel_map=<channel map> "
  54         "remix=<remix channels?>");
  55
  56 struct userdata {
  57     pa_module *module;
  58
  59     pa_sink *sink;
  60     pa_sink_input *sink_input;
  61 };
  62
  63 static const char* const valid_modargs[] = {
  64     "sink_name",
  65     "sink_properties",
  66     "master",
  67     "master_channel_map",
  68     "format",
  69     "rate",
  70     "channels",
  71     "channel_map",
  72     "remix",
  73     NULL
  74 };
  75
  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;
  79
  80     switch (code) {
  81
  82         case PA_SINK_MESSAGE_GET_LATENCY:
  83
  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;
  89                 return 0;
  90             }
  91
  92             *((pa_usec_t*) data) =
  93                 /* Get the latency of the master sink */
  94                 pa_sink_get_latency_within_thread(u->sink_input->sink) +
  95
  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);
  98
  99             return 0;
 100     }
 101
 102     return pa_sink_process_msg(o, code, data, offset, chunk);
 103 }
 104
 105 /* Called from main context */
 106 static int sink_set_state(pa_sink *s, pa_sink_state_t state) {
 107     struct userdata *u;
 108
 109     pa_sink_assert_ref(s);
 110     pa_assert_se(u = s->userdata);
 111
 112     if (!PA_SINK_IS_LINKED(state) ||
 113         !PA_SINK_INPUT_IS_LINKED(pa_sink_input_get_state(u->sink_input)))
 114         return 0;
 115
 116     pa_sink_input_cork(u->sink_input, state == PA_SINK_SUSPENDED);
 117     return 0;
 118 }
 119
 120 /* Called from I/O thread context */
 121 static void sink_request_rewind(pa_sink *s) {
 122     struct userdata *u;
 123
 124     pa_sink_assert_ref(s);
 125     pa_assert_se(u = s->userdata);
 126
 127     if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
 128         !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state))
 129         return;
 130
 131     pa_sink_input_request_rewind(u->sink_input, s->thread_info.rewind_nbytes, TRUE, FALSE, FALSE);
 132 }
 133
 134 /* Called from I/O thread context */
 135 static void sink_update_requested_latency(pa_sink *s) {
 136     struct userdata *u;
 137
 138     pa_sink_assert_ref(s);
 139     pa_assert_se(u = s->userdata);
 140
 141     if (!PA_SINK_IS_LINKED(u->sink->thread_info.state) ||
 142         !PA_SINK_INPUT_IS_LINKED(u->sink_input->thread_info.state))
 143         return;
 144
 145     /* Just hand this one over to the master sink */
 146     pa_sink_input_set_requested_latency_within_thread(
 147             u->sink_input,
 148             pa_sink_get_requested_latency_within_thread(s));
 149 }
 150
 151 /* Called from I/O thread context */
 152 static int sink_input_pop_cb(pa_sink_input *i, size_t nbytes, pa_memchunk *chunk) {
 153     struct userdata *u;
 154
 155     pa_sink_input_assert_ref(i);
 156     pa_assert(chunk);
 157     pa_assert_se(u = i->userdata);
 158
 159     /* Hmm, process any rewind request that might be queued up */
 160     pa_sink_process_rewind(u->sink, 0);
 161
 162     pa_sink_render(u->sink, nbytes, chunk);
 163     return 0;
 164 }
 165
 166 /* Called from I/O thread context */
 167 static void sink_input_process_rewind_cb(pa_sink_input *i, size_t nbytes) {
 168     size_t amount = 0;
 169     struct userdata *u;
 170
 171     pa_sink_input_assert_ref(i);
 172     pa_assert_se(u = i->userdata);
 173
 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;
 177     }
 178
 179     pa_sink_process_rewind(u->sink, amount);
 180 }
 181
 182 /* Called from I/O thread context */
 183 static void sink_input_update_max_rewind_cb(pa_sink_input *i, size_t nbytes) {
 184     struct userdata *u;
 185
 186     pa_sink_input_assert_ref(i);
 187     pa_assert_se(u = i->userdata);
 188
 189     pa_sink_set_max_rewind_within_thread(u->sink, nbytes);
 190 }
 191
 192 /* Called from I/O thread context */
 193 static void sink_input_update_max_request_cb(pa_sink_input *i, size_t nbytes) {
 194     struct userdata *u;
 195
 196     pa_sink_input_assert_ref(i);
 197     pa_assert_se(u = i->userdata);
 198
 199     pa_sink_set_max_request_within_thread(u->sink, nbytes);
 200 }
 201
 202 /* Called from I/O thread context */
 203 static void sink_input_update_sink_latency_range_cb(pa_sink_input *i) {
 204     struct userdata *u;
 205
 206     pa_sink_input_assert_ref(i);
 207     pa_assert_se(u = i->userdata);
 208
 209     pa_sink_set_latency_range_within_thread(u->sink, i->sink->thread_info.min_latency, i->sink->thread_info.max_latency);
 210 }
 211
 212 /* Called from I/O thread context */
 213 static void sink_input_update_sink_fixed_latency_cb(pa_sink_input *i) {
 214     struct userdata *u;
 215
 216     pa_sink_input_assert_ref(i);
 217     pa_assert_se(u = i->userdata);
 218
 219     pa_sink_set_fixed_latency_within_thread(u->sink, i->sink->thread_info.fixed_latency);
 220 }
 221
 222 /* Called from I/O thread context */
 223 static void sink_input_detach_cb(pa_sink_input *i) {
 224     struct userdata *u;
 225
 226     pa_sink_input_assert_ref(i);
 227     pa_assert_se(u = i->userdata);
 228
 229     pa_sink_detach_within_thread(u->sink);
 230
 231     pa_sink_set_rtpoll(u->sink, NULL);
 232 }
 233
 234 /* Called from I/O thread context */
 235 static void sink_input_attach_cb(pa_sink_input *i) {
 236     struct userdata *u;
 237
 238     pa_sink_input_assert_ref(i);
 239     pa_assert_se(u = i->userdata);
 240
 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));
 246
 247     pa_sink_attach_within_thread(u->sink);
 248 }
 249
 250 /* Called from main context */
 251 static void sink_input_kill_cb(pa_sink_input *i) {
 252     struct userdata *u;
 253
 254     pa_sink_input_assert_ref(i);
 255     pa_assert_se(u = i->userdata);
 256
 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);
 262
 263     pa_sink_input_unref(u->sink_input);
 264     u->sink_input = NULL;
 265
 266     pa_sink_unref(u->sink);
 267     u->sink = NULL;
 268
 269     pa_module_unload_request(u->module, TRUE);
 270 }
 271
 272 /* Called from IO thread context */
 273 static void sink_input_state_change_cb(pa_sink_input *i, pa_sink_input_state_t state) {
 274     struct userdata *u;
 275
 276     pa_sink_input_assert_ref(i);
 277     pa_assert_se(u = i->userdata);
 278
 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);
 285     }
 286 }
 287
 288 /* Called from main context */
 289 static pa_bool_t sink_input_may_move_to_cb(pa_sink_input *i, pa_sink *dest) {
 290     struct userdata *u;
 291
 292     pa_sink_input_assert_ref(i);
 293     pa_assert_se(u = i->userdata);
 294
 295     return u->sink != dest;
 296 }
 297
 298 /* Called from main context */
 299 static void sink_input_moving_cb(pa_sink_input *i, pa_sink *dest) {
 300     struct userdata *u;
 301
 302     pa_sink_input_assert_ref(i);
 303     pa_assert_se(u = i->userdata);
 304
 305     pa_sink_set_asyncmsgq(u->sink, dest->asyncmsgq);
 306     pa_sink_update_flags(u->sink, PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY, dest->flags);
 307 }
 308
 309 int pa__init(pa_module*m) {
 310     struct userdata *u;
 311     pa_sample_spec ss;
 312     pa_channel_map sink_map, stream_map;
 313     pa_modargs *ma;
 314     const char *k;
 315     pa_sink *master;
 316     pa_sink_input_new_data sink_input_data;
 317     pa_sink_new_data sink_data;
 318     pa_bool_t remix = TRUE;
 319
 320     pa_assert(m);
 321
 322     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 323         pa_log("Failed to parse module arguments.");
 324         goto fail;
 325     }
 326
 327     if (!(master = pa_namereg_get(m->core, pa_modargs_get_value(ma, "master", NULL), PA_NAMEREG_SINK))) {
 328         pa_log("Master sink not found");
 329         goto fail;
 330     }
 331
 332     ss = master->sample_spec;
 333     sink_map = master->channel_map;
 334     if (pa_modargs_get_sample_spec_and_channel_map(ma, &ss, &sink_map, PA_CHANNEL_MAP_DEFAULT) < 0) {
 335         pa_log("Invalid sample format specification or channel map");
 336         goto fail;
 337     }
 338
 339     stream_map = sink_map;
 340     if (pa_modargs_get_channel_map(ma, "master_channel_map", &stream_map) < 0) {
 341         pa_log("Invalid master channel map");
 342         goto fail;
 343     }
 344
 345     if (stream_map.channels != ss.channels) {
 346         pa_log("Number of channels doesn't match");
 347         goto fail;
 348     }
 349
 350     if (pa_channel_map_equal(&stream_map, &master->channel_map))
 351         pa_log_warn("No remapping configured, proceeding nonetheless!");
 352
 353     if (pa_modargs_get_value_boolean(ma, "remix", &remix) < 0) {
 354         pa_log("Invalid boolean remix parameter");
 355         goto fail;
 356     }
 357
 358     u = pa_xnew0(struct userdata, 1);
 359     u->module = m;
 360     m->userdata = u;
 361
 362     /* Create sink */
 363     pa_sink_new_data_init(&sink_data);
 364     sink_data.driver = __FILE__;
 365     sink_data.module = m;
 366     if (!(sink_data.name = pa_xstrdup(pa_modargs_get_value(ma, "sink_name", NULL))))
 367         sink_data.name = pa_sprintf_malloc("%s.remapped", master->name);
 368     pa_sink_new_data_set_sample_spec(&sink_data, &ss);
 369     pa_sink_new_data_set_channel_map(&sink_data, &sink_map);
 370     k = pa_proplist_gets(master->proplist, PA_PROP_DEVICE_DESCRIPTION);
 371     pa_proplist_setf(sink_data.proplist, PA_PROP_DEVICE_DESCRIPTION, "Remapped %s", k ? k : master->name);
 372     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_MASTER_DEVICE, master->name);
 373     pa_proplist_sets(sink_data.proplist, PA_PROP_DEVICE_CLASS, "filter");
 374
 375     if (pa_modargs_get_proplist(ma, "sink_properties", sink_data.proplist, PA_UPDATE_REPLACE) < 0) {
 376         pa_log("Invalid properties");
 377         pa_sink_new_data_done(&sink_data);
 378         goto fail;
 379     }
 380
 381     u->sink = pa_sink_new(m->core, &sink_data, master->flags & (PA_SINK_LATENCY|PA_SINK_DYNAMIC_LATENCY));
 382     pa_sink_new_data_done(&sink_data);
 383
 384     if (!u->sink) {
 385         pa_log("Failed to create sink.");
 386         goto fail;
 387     }
 388
 389     u->sink->parent.process_msg = sink_process_msg;
 390     u->sink->set_state = sink_set_state;
 391     u->sink->update_requested_latency = sink_update_requested_latency;
 392     u->sink->request_rewind = sink_request_rewind;
 393     u->sink->userdata = u;
 394
 395     pa_sink_set_asyncmsgq(u->sink, master->asyncmsgq);
 396
 397     /* Create sink input */
 398     pa_sink_input_new_data_init(&sink_input_data);
 399     sink_input_data.driver = __FILE__;
 400     sink_input_data.module = m;
 401     sink_input_data.sink = master;
 402     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_NAME, "Remapped Stream");
 403     pa_proplist_sets(sink_input_data.proplist, PA_PROP_MEDIA_ROLE, "filter");
 404     pa_sink_input_new_data_set_sample_spec(&sink_input_data, &ss);
 405     pa_sink_input_new_data_set_channel_map(&sink_input_data, &stream_map);
 406
 407     pa_sink_input_new(&u->sink_input, m->core, &sink_input_data, (remix ? 0 : PA_SINK_INPUT_NO_REMIX));
 408     pa_sink_input_new_data_done(&sink_input_data);
 409
 410     if (!u->sink_input)
 411         goto fail;
 412
 413     u->sink_input->pop = sink_input_pop_cb;
 414     u->sink_input->process_rewind = sink_input_process_rewind_cb;
 415     u->sink_input->update_max_rewind = sink_input_update_max_rewind_cb;
 416     u->sink_input->update_max_request = sink_input_update_max_request_cb;
 417     u->sink_input->update_sink_latency_range = sink_input_update_sink_latency_range_cb;
 418     u->sink_input->update_sink_fixed_latency = sink_input_update_sink_fixed_latency_cb;
 419     u->sink_input->attach = sink_input_attach_cb;
 420     u->sink_input->detach = sink_input_detach_cb;
 421     u->sink_input->kill = sink_input_kill_cb;
 422     u->sink_input->state_change = sink_input_state_change_cb;
 423     u->sink_input->may_move_to = sink_input_may_move_to_cb;
 424     u->sink_input->moving = sink_input_moving_cb;
 425     u->sink_input->userdata = u;
 426
 427     pa_sink_put(u->sink);
 428     pa_sink_input_put(u->sink_input);
 429
 430     pa_modargs_free(ma);
 431
 432     return 0;
 433
 434 fail:
 435     if (ma)
 436         pa_modargs_free(ma);
 437
 438     pa__done(m);
 439
 440     return -1;
 441 }
 442
 443 int pa__get_n_used(pa_module *m) {
 444     struct userdata *u;
 445
 446     pa_assert(m);
 447     pa_assert_se(u = m->userdata);
 448
 449     return pa_sink_linked_by(u->sink);
 450 }
 451
 452 void pa__done(pa_module*m) {
 453     struct userdata *u;
 454
 455     pa_assert(m);
 456
 457     if (!(u = m->userdata))
 458         return;
 459
 460     /* See comments in sink_input_kill_cb() above regarding
 461      * destruction order! */
 462
 463     if (u->sink_input)
 464         pa_sink_input_unlink(u->sink_input);
 465
 466     if (u->sink)
 467         pa_sink_unlink(u->sink);
 468
 469     if (u->sink_input)
 470         pa_sink_input_unref(u->sink_input);
 471
 472     if (u->sink)
 473         pa_sink_unref(u->sink);
 474
 475     pa_xfree(u);
 476 }