code.delx.au - pulseaudio/blob - src/modules/module-intended-roles.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 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 <unistd.h>
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <sys/types.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <ctype.h>
  33
  34 #include <pulse/xmalloc.h>
  35 #include <pulse/volume.h>
  36 #include <pulse/timeval.h>
  37 #include <pulse/util.h>
  38
  39 #include <pulsecore/core-error.h>
  40 #include <pulsecore/module.h>
  41 #include <pulsecore/core-util.h>
  42 #include <pulsecore/modargs.h>
  43 #include <pulsecore/log.h>
  44 #include <pulsecore/core-subscribe.h>
  45 #include <pulsecore/sink-input.h>
  46 #include <pulsecore/source-output.h>
  47 #include <pulsecore/namereg.h>
  48 #include <pulsecore/protocol-native.h>
  49 #include <pulsecore/pstream.h>
  50 #include <pulsecore/pstream-util.h>
  51 #include <pulsecore/database.h>
  52
  53 #include "module-intended-roles-symdef.h"
  54
  55 PA_MODULE_AUTHOR("Lennart Poettering");
  56 PA_MODULE_DESCRIPTION("Automatically set device of streams based of intended roles of devices");
  57 PA_MODULE_VERSION(PACKAGE_VERSION);
  58 PA_MODULE_LOAD_ONCE(TRUE);
  59 PA_MODULE_USAGE(
  60         "on_hotplug=<When new device becomes available, recheck streams?> "
  61         "on_rescue=<When device becomes unavailable, recheck streams?>");
  62
  63 static const char* const valid_modargs[] = {
  64     "on_hotplug",
  65     "on_rescue",
  66     NULL
  67 };
  68
  69 struct userdata {
  70     pa_core *core;
  71     pa_module *module;
  72     pa_hook_slot
  73         *sink_input_new_hook_slot,
  74         *source_output_new_hook_slot,
  75         *sink_put_hook_slot,
  76         *source_put_hook_slot,
  77         *sink_unlink_hook_slot,
  78         *source_unlink_hook_slot;
  79
  80     pa_bool_t on_hotplug:1;
  81     pa_bool_t on_rescue:1;
  82 };
  83
  84 static pa_bool_t role_match(pa_proplist *proplist, const char *role) {
  85     const char *ir;
  86     char *r;
  87     const char *state = NULL;
  88
  89     if (!(ir = pa_proplist_gets(proplist, PA_PROP_DEVICE_INTENDED_ROLES)))
  90         return FALSE;
  91
  92     while ((r = pa_split_spaces(ir, &state))) {
  93
  94         if (pa_streq(role, r)) {
  95             pa_xfree(r);
  96             return TRUE;
  97         }
  98
  99         pa_xfree(r);
 100     }
 101
 102     return FALSE;
 103 }
 104
 105 static pa_hook_result_t sink_input_new_hook_callback(pa_core *c, pa_sink_input_new_data *new_data, struct userdata *u) {
 106     const char *role;
 107     pa_sink *s, *def;
 108     uint32_t idx;
 109
 110     pa_assert(c);
 111     pa_assert(new_data);
 112     pa_assert(u);
 113
 114     if (!new_data->proplist) {
 115         pa_log_debug("New stream lacks property data.");
 116         return PA_HOOK_OK;
 117     }
 118
 119     if (new_data->sink) {
 120         pa_log_debug("Not setting device for stream %s, because already set.", pa_strnull(pa_proplist_gets(new_data->proplist, PA_PROP_MEDIA_NAME)));
 121         return PA_HOOK_OK;
 122     }
 123
 124     if (!(role = pa_proplist_gets(new_data->proplist, PA_PROP_MEDIA_ROLE))) {
 125         pa_log_debug("Not setting device for stream %s, because it lacks role.", pa_strnull(pa_proplist_gets(new_data->proplist, PA_PROP_MEDIA_NAME)));
 126         return PA_HOOK_OK;
 127     }
 128
 129     /* Prefer the default sink over any other sink, just in case... */
 130     if ((def = pa_namereg_get_default_sink(c)))
 131         if (role_match(def->proplist, role)) {
 132             new_data->sink = def;
 133             new_data->save_sink = FALSE;
 134             return PA_HOOK_OK;
 135         }
 136
 137     PA_IDXSET_FOREACH(s, c->sinks, idx) {
 138         if (s == def)
 139             continue;
 140
 141         if (role_match(s->proplist, role)) {
 142             new_data->sink = s;
 143             new_data->save_sink = FALSE;
 144             return PA_HOOK_OK;
 145         }
 146     }
 147
 148     return PA_HOOK_OK;
 149 }
 150
 151 static pa_hook_result_t source_output_new_hook_callback(pa_core *c, pa_source_output_new_data *new_data, struct userdata *u) {
 152     const char *role;
 153     pa_source *s, *def;
 154     uint32_t idx;
 155
 156     pa_assert(c);
 157     pa_assert(new_data);
 158     pa_assert(u);
 159
 160     if (!new_data->proplist) {
 161         pa_log_debug("New stream lacks property data.");
 162         return PA_HOOK_OK;
 163     }
 164
 165     if (new_data->source) {
 166         pa_log_debug("Not setting device for stream %s, because already set.", pa_strnull(pa_proplist_gets(new_data->proplist, PA_PROP_MEDIA_NAME)));
 167         return PA_HOOK_OK;
 168     }
 169
 170     if (!(role = pa_proplist_gets(new_data->proplist, PA_PROP_MEDIA_ROLE))) {
 171         pa_log_debug("Not setting device for stream %s, because it lacks role.", pa_strnull(pa_proplist_gets(new_data->proplist, PA_PROP_MEDIA_NAME)));
 172         return PA_HOOK_OK;
 173     }
 174
 175     /* Prefer the default source over any other source, just in case... */
 176     if ((def = pa_namereg_get_default_source(c)))
 177         if (role_match(def->proplist, role)) {
 178             new_data->source = def;
 179             new_data->save_source = FALSE;
 180             return PA_HOOK_OK;
 181         }
 182
 183     PA_IDXSET_FOREACH(s, c->sources, idx) {
 184         if (s == def)
 185             continue;
 186
 187         if (role_match(s->proplist, role)) {
 188             new_data->source = s;
 189             new_data->save_source = FALSE;
 190             return PA_HOOK_OK;
 191         }
 192     }
 193
 194     return PA_HOOK_OK;
 195 }
 196
 197 static pa_hook_result_t sink_put_hook_callback(pa_core *c, pa_sink *sink, struct userdata *u) {
 198     pa_sink_input *si;
 199     uint32_t idx;
 200
 201     pa_assert(c);
 202     pa_assert(sink);
 203     pa_assert(u);
 204     pa_assert(u->on_hotplug);
 205
 206     PA_IDXSET_FOREACH(si, c->sink_inputs, idx) {
 207         const char *role;
 208
 209         if (si->sink == sink)
 210             continue;
 211
 212         if (si->save_sink)
 213             continue;
 214
 215         if (!(role = pa_proplist_gets(si->proplist, PA_PROP_MEDIA_ROLE)))
 216             continue;
 217
 218         if (role_match(si->sink->proplist, role))
 219             continue;
 220
 221         if (!role_match(sink->proplist, role))
 222             continue;
 223
 224         pa_sink_input_move_to(si, sink, FALSE);
 225     }
 226
 227     return PA_HOOK_OK;
 228 }
 229
 230 static pa_hook_result_t source_put_hook_callback(pa_core *c, pa_source *source, struct userdata *u) {
 231     pa_source_output *so;
 232     uint32_t idx;
 233
 234     pa_assert(c);
 235     pa_assert(source);
 236     pa_assert(u);
 237     pa_assert(u->on_hotplug);
 238
 239     PA_IDXSET_FOREACH(so, c->source_outputs, idx) {
 240         const char *role;
 241
 242         if (so->source == source)
 243             continue;
 244
 245         if (so->save_source)
 246             continue;
 247
 248         if (so->direct_on_input)
 249             continue;
 250
 251         if (!(role = pa_proplist_gets(so->proplist, PA_PROP_MEDIA_ROLE)))
 252             continue;
 253
 254         if (role_match(so->source->proplist, role))
 255             continue;
 256
 257         if (!role_match(source->proplist, role))
 258             continue;
 259
 260         pa_source_output_move_to(so, source, FALSE);
 261     }
 262
 263     return PA_HOOK_OK;
 264 }
 265
 266 static pa_hook_result_t sink_unlink_hook_callback(pa_core *c, pa_sink *sink, struct userdata *u) {
 267     pa_sink_input *si;
 268     uint32_t idx;
 269     pa_sink *def;
 270
 271     pa_assert(c);
 272     pa_assert(sink);
 273     pa_assert(u);
 274     pa_assert(u->on_rescue);
 275
 276     /* There's no point in doing anything if the core is shut down anyway */
 277     if (c->state == PA_CORE_SHUTDOWN)
 278         return PA_HOOK_OK;
 279
 280     /* If there not default sink, then there is no sink at all */
 281     if (!(def = pa_namereg_get_default_sink(c)))
 282         return PA_HOOK_OK;
 283
 284     PA_IDXSET_FOREACH(si, sink->inputs, idx) {
 285         const char *role;
 286         uint32_t jdx;
 287         pa_sink *d;
 288
 289         if (!(role = pa_proplist_gets(si->proplist, PA_PROP_MEDIA_ROLE)))
 290             continue;
 291
 292         /* Would the default sink fit? If so, let's use it */
 293         if (def != sink && role_match(def->proplist, role)) {
 294             pa_sink_input_move_to(si, def, FALSE);
 295             continue;
 296         }
 297
 298         /* Try to find some other fitting sink */
 299         PA_IDXSET_FOREACH(d, c->sinks, jdx) {
 300             if (d == def || d == sink)
 301                 continue;
 302
 303             if (role_match(d->proplist, role)) {
 304                 pa_sink_input_move_to(si, d, FALSE);
 305                 break;
 306             }
 307         }
 308     }
 309
 310     return PA_HOOK_OK;
 311 }
 312
 313 static pa_hook_result_t source_unlink_hook_callback(pa_core *c, pa_source *source, struct userdata *u) {
 314     pa_source_output *so;
 315     uint32_t idx;
 316     pa_source *def;
 317
 318     pa_assert(c);
 319     pa_assert(source);
 320     pa_assert(u);
 321     pa_assert(u->on_rescue);
 322
 323     /* There's no point in doing anything if the core is shut down anyway */
 324     if (c->state == PA_CORE_SHUTDOWN)
 325         return PA_HOOK_OK;
 326
 327     /* If there not default source, then there is no source at all */
 328     if (!(def = pa_namereg_get_default_source(c)))
 329         return PA_HOOK_OK;
 330
 331     PA_IDXSET_FOREACH(so, source->outputs, idx) {
 332         const char *role;
 333         uint32_t jdx;
 334         pa_source *d;
 335
 336         if (so->direct_on_input)
 337             continue;
 338
 339         if (!(role = pa_proplist_gets(so->proplist, PA_PROP_MEDIA_ROLE)))
 340             continue;
 341
 342         /* Would the default source fit? If so, let's use it */
 343         if (def != source && role_match(def->proplist, role) && !source->monitor_of == !def->monitor_of) {
 344             pa_source_output_move_to(so, def, FALSE);
 345             continue;
 346         }
 347
 348         /* Try to find some other fitting source */
 349         PA_IDXSET_FOREACH(d, c->sources, jdx) {
 350             if (d == def || d == source)
 351                 continue;
 352
 353             if (role_match(d->proplist, role) && !source->monitor_of == !d->monitor_of) {
 354                 pa_source_output_move_to(so, d, FALSE);
 355                 break;
 356             }
 357         }
 358     }
 359
 360     return PA_HOOK_OK;
 361 }
 362
 363 int pa__init(pa_module*m) {
 364     pa_modargs *ma = NULL;
 365     struct userdata *u;
 366     pa_bool_t on_hotplug = TRUE, on_rescue = TRUE;
 367
 368     pa_assert(m);
 369
 370     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 371         pa_log("Failed to parse module arguments");
 372         goto fail;
 373     }
 374
 375     if (pa_modargs_get_value_boolean(ma, "on_hotplug", &on_hotplug) < 0 ||
 376         pa_modargs_get_value_boolean(ma, "on_rescue", &on_rescue) < 0) {
 377         pa_log("on_hotplug= and on_rescue= expect boolean arguments");
 378         goto fail;
 379     }
 380
 381     m->userdata = u = pa_xnew0(struct userdata, 1);
 382     u->core = m->core;
 383     u->module = m;
 384     u->on_hotplug = on_hotplug;
 385     u->on_rescue = on_rescue;
 386
 387     /* A little bit later than module-stream-restore */
 388     u->sink_input_new_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_INPUT_NEW], PA_HOOK_EARLY+10, (pa_hook_cb_t) sink_input_new_hook_callback, u);
 389     u->source_output_new_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NEW], PA_HOOK_EARLY+10, (pa_hook_cb_t) source_output_new_hook_callback, u);
 390
 391     if (on_hotplug) {
 392         /* A little bit later than module-stream-restore */
 393         u->sink_put_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_PUT], PA_HOOK_LATE+10, (pa_hook_cb_t) sink_put_hook_callback, u);
 394         u->source_put_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_PUT], PA_HOOK_LATE+10, (pa_hook_cb_t) source_put_hook_callback, u);
 395     }
 396
 397     if (on_rescue) {
 398         /* A little bit later than module-stream-restore, a little bit earlier than module-rescue-streams, ... */
 399         u->sink_unlink_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SINK_UNLINK], PA_HOOK_LATE+10, (pa_hook_cb_t) sink_unlink_hook_callback, u);
 400         u->source_unlink_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_UNLINK], PA_HOOK_LATE+10, (pa_hook_cb_t) source_unlink_hook_callback, u);
 401     }
 402
 403     pa_modargs_free(ma);
 404     return 0;
 405
 406 fail:
 407     pa__done(m);
 408
 409     if (ma)
 410         pa_modargs_free(ma);
 411
 412     return  -1;
 413 }
 414
 415 void pa__done(pa_module*m) {
 416     struct userdata* u;
 417
 418     pa_assert(m);
 419
 420     if (!(u = m->userdata))
 421         return;
 422
 423     if (u->sink_input_new_hook_slot)
 424         pa_hook_slot_free(u->sink_input_new_hook_slot);
 425     if (u->source_output_new_hook_slot)
 426         pa_hook_slot_free(u->source_output_new_hook_slot);
 427
 428     if (u->sink_put_hook_slot)
 429         pa_hook_slot_free(u->sink_put_hook_slot);
 430     if (u->source_put_hook_slot)
 431         pa_hook_slot_free(u->source_put_hook_slot);
 432
 433     if (u->sink_unlink_hook_slot)
 434         pa_hook_slot_free(u->sink_unlink_hook_slot);
 435     if (u->source_unlink_hook_slot)
 436         pa_hook_slot_free(u->source_unlink_hook_slot);
 437
 438     pa_xfree(u);
 439 }