code.delx.au - pulseaudio/blob - src/modules/alsa/module-alsa-card.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 <pulse/xmalloc.h>
  27 #include <pulse/i18n.h>
  28
  29 #include <pulsecore/core-util.h>
  30 #include <pulsecore/modargs.h>
  31 #include <pulsecore/queue.h>
  32
  33 #include <modules/reserve-wrap.h>
  34
  35 #ifdef HAVE_UDEV
  36 #include <modules/udev-util.h>
  37 #endif
  38
  39 #include "alsa-util.h"
  40 #include "alsa-sink.h"
  41 #include "alsa-source.h"
  42 #include "module-alsa-card-symdef.h"
  43
  44 PA_MODULE_AUTHOR("Lennart Poettering");
  45 PA_MODULE_DESCRIPTION("ALSA Card");
  46 PA_MODULE_VERSION(PACKAGE_VERSION);
  47 PA_MODULE_LOAD_ONCE(FALSE);
  48 PA_MODULE_USAGE(
  49         "name=<name for the card/sink/source, to be prefixed> "
  50         "card_name=<name for the card> "
  51         "card_properties=<properties for the card> "
  52         "sink_name=<name for the sink> "
  53         "sink_properties=<properties for the sink> "
  54         "source_name=<name for the source> "
  55         "source_properties=<properties for the source> "
  56         "namereg_fail=<pa_namereg_register() fail parameter value> "
  57         "device_id=<ALSA card index> "
  58         "format=<sample format> "
  59         "rate=<sample rate> "
  60         "fragments=<number of fragments> "
  61         "fragment_size=<fragment size> "
  62         "mmap=<enable memory mapping?> "
  63         "tsched=<enable system timer based scheduling mode?> "
  64         "tsched_buffer_size=<buffer size when using timer based scheduling> "
  65         "tsched_buffer_watermark=<lower fill watermark> "
  66         "profile=<profile name> "
  67         "ignore_dB=<ignore dB information from the device?>");
  68
  69 static const char* const valid_modargs[] = {
  70     "name",
  71     "card_name",
  72     "card_properties",
  73     "sink_name",
  74     "sink_properties",
  75     "source_name",
  76     "source_properties",
  77     "namereg_fail",
  78     "device_id",
  79     "format",
  80     "rate",
  81     "fragments",
  82     "fragment_size",
  83     "mmap",
  84     "tsched",
  85     "tsched_buffer_size",
  86     "tsched_buffer_watermark",
  87     "profile",
  88     "ignore_dB",
  89     NULL
  90 };
  91
  92 #define DEFAULT_DEVICE_ID "0"
  93
  94 struct userdata {
  95     pa_core *core;
  96     pa_module *module;
  97
  98     char *device_id;
  99
 100     pa_card *card;
 101
 102     pa_modargs *modargs;
 103
 104     pa_alsa_profile_set *profile_set;
 105 };
 106
 107 struct profile_data {
 108     pa_alsa_profile *profile;
 109 };
 110
 111 static void add_profiles(struct userdata *u, pa_hashmap *h) {
 112     pa_alsa_profile *ap;
 113     void *state;
 114
 115     pa_assert(u);
 116     pa_assert(h);
 117
 118     PA_HASHMAP_FOREACH(ap, u->profile_set->profiles, state) {
 119         struct profile_data *d;
 120         pa_card_profile *cp;
 121         pa_alsa_mapping *m;
 122         uint32_t idx;
 123
 124         cp = pa_card_profile_new(ap->name, ap->description, sizeof(struct profile_data));
 125         cp->priority = ap->priority;
 126
 127         if (ap->output_mappings) {
 128             cp->n_sinks = pa_idxset_size(ap->output_mappings);
 129
 130             PA_IDXSET_FOREACH(m, ap->output_mappings, idx)
 131                 if (m->channel_map.channels > cp->max_sink_channels)
 132                     cp->max_sink_channels = m->channel_map.channels;
 133         }
 134
 135         if (ap->input_mappings) {
 136             cp->n_sources = pa_idxset_size(ap->input_mappings);
 137
 138             PA_IDXSET_FOREACH(m, ap->input_mappings, idx)
 139                 if (m->channel_map.channels > cp->max_source_channels)
 140                     cp->max_source_channels = m->channel_map.channels;
 141         }
 142
 143         d = PA_CARD_PROFILE_DATA(cp);
 144         d->profile = ap;
 145
 146         pa_hashmap_put(h, cp->name, cp);
 147     }
 148 }
 149
 150 static void add_disabled_profile(pa_hashmap *profiles) {
 151     pa_card_profile *p;
 152     struct profile_data *d;
 153
 154     p = pa_card_profile_new("off", _("Off"), sizeof(struct profile_data));
 155
 156     d = PA_CARD_PROFILE_DATA(p);
 157     d->profile = NULL;
 158
 159     pa_hashmap_put(profiles, p->name, p);
 160 }
 161
 162 static int card_set_profile(pa_card *c, pa_card_profile *new_profile) {
 163     struct userdata *u;
 164     struct profile_data *nd, *od;
 165     uint32_t idx;
 166     pa_alsa_mapping *am;
 167     pa_queue *sink_inputs = NULL, *source_outputs = NULL;
 168
 169     pa_assert(c);
 170     pa_assert(new_profile);
 171     pa_assert_se(u = c->userdata);
 172
 173     nd = PA_CARD_PROFILE_DATA(new_profile);
 174     od = PA_CARD_PROFILE_DATA(c->active_profile);
 175
 176     if (od->profile && od->profile->output_mappings)
 177         PA_IDXSET_FOREACH(am, od->profile->output_mappings, idx) {
 178             if (!am->sink)
 179                 continue;
 180
 181             if (nd->profile &&
 182                 nd->profile->output_mappings &&
 183                 pa_idxset_get_by_data(nd->profile->output_mappings, am, NULL))
 184                 continue;
 185
 186             sink_inputs = pa_sink_move_all_start(am->sink, sink_inputs);
 187             pa_alsa_sink_free(am->sink);
 188             am->sink = NULL;
 189         }
 190
 191     if (od->profile && od->profile->input_mappings)
 192         PA_IDXSET_FOREACH(am, od->profile->input_mappings, idx) {
 193             if (!am->source)
 194                 continue;
 195
 196             if (nd->profile &&
 197                 nd->profile->input_mappings &&
 198                 pa_idxset_get_by_data(nd->profile->input_mappings, am, NULL))
 199                 continue;
 200
 201             source_outputs = pa_source_move_all_start(am->source, source_outputs);
 202             pa_alsa_source_free(am->source);
 203             am->source = NULL;
 204         }
 205
 206     if (nd->profile && nd->profile->output_mappings)
 207         PA_IDXSET_FOREACH(am, nd->profile->output_mappings, idx) {
 208
 209             if (!am->sink)
 210                 am->sink = pa_alsa_sink_new(c->module, u->modargs, __FILE__, c, am);
 211
 212             if (sink_inputs && am->sink) {
 213                 pa_sink_move_all_finish(am->sink, sink_inputs, FALSE);
 214                 sink_inputs = NULL;
 215             }
 216         }
 217
 218     if (nd->profile && nd->profile->input_mappings)
 219         PA_IDXSET_FOREACH(am, nd->profile->input_mappings, idx) {
 220
 221             if (!am->source)
 222                 am->source = pa_alsa_source_new(c->module, u->modargs, __FILE__, c, am);
 223
 224             if (source_outputs && am->source) {
 225                 pa_source_move_all_finish(am->source, source_outputs, FALSE);
 226                 source_outputs = NULL;
 227             }
 228         }
 229
 230     if (sink_inputs)
 231         pa_sink_move_all_fail(sink_inputs);
 232
 233     if (source_outputs)
 234         pa_source_move_all_fail(source_outputs);
 235
 236     return 0;
 237 }
 238
 239 static void init_profile(struct userdata *u) {
 240     uint32_t idx;
 241     pa_alsa_mapping *am;
 242     struct profile_data *d;
 243
 244     pa_assert(u);
 245
 246     d = PA_CARD_PROFILE_DATA(u->card->active_profile);
 247
 248     if (d->profile && d->profile->output_mappings)
 249         PA_IDXSET_FOREACH(am, d->profile->output_mappings, idx)
 250             am->sink = pa_alsa_sink_new(u->module, u->modargs, __FILE__, u->card, am);
 251
 252     if (d->profile && d->profile->input_mappings)
 253         PA_IDXSET_FOREACH(am, d->profile->input_mappings, idx)
 254             am->source = pa_alsa_source_new(u->module, u->modargs, __FILE__, u->card, am);
 255 }
 256
 257 static void set_card_name(pa_card_new_data *data, pa_modargs *ma, const char *device_id) {
 258     char *t;
 259     const char *n;
 260
 261     pa_assert(data);
 262     pa_assert(ma);
 263     pa_assert(device_id);
 264
 265     if ((n = pa_modargs_get_value(ma, "card_name", NULL))) {
 266         pa_card_new_data_set_name(data, n);
 267         data->namereg_fail = TRUE;
 268         return;
 269     }
 270
 271     if ((n = pa_modargs_get_value(ma, "name", NULL)))
 272         data->namereg_fail = TRUE;
 273     else {
 274         n = device_id;
 275         data->namereg_fail = FALSE;
 276     }
 277
 278     t = pa_sprintf_malloc("alsa_card.%s", n);
 279     pa_card_new_data_set_name(data, t);
 280     pa_xfree(t);
 281 }
 282
 283 int pa__init(pa_module *m) {
 284     pa_card_new_data data;
 285     pa_modargs *ma;
 286     int alsa_card_index;
 287     struct userdata *u;
 288     pa_reserve_wrapper *reserve = NULL;
 289     const char *description;
 290     char *fn = NULL;
 291     pa_bool_t namereg_fail = FALSE;
 292
 293     pa_alsa_refcnt_inc();
 294
 295     pa_assert(m);
 296
 297     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 298         pa_log("Failed to parse module arguments");
 299         goto fail;
 300     }
 301
 302     m->userdata = u = pa_xnew0(struct userdata, 1);
 303     u->core = m->core;
 304     u->module = m;
 305     u->device_id = pa_xstrdup(pa_modargs_get_value(ma, "device_id", DEFAULT_DEVICE_ID));
 306     u->modargs = ma;
 307
 308     if ((alsa_card_index = snd_card_get_index(u->device_id)) < 0) {
 309         pa_log("Card '%s' doesn't exist: %s", u->device_id, pa_alsa_strerror(alsa_card_index));
 310         goto fail;
 311     }
 312
 313     if (!pa_in_system_mode()) {
 314         char *rname;
 315
 316         if ((rname = pa_alsa_get_reserve_name(u->device_id))) {
 317             reserve = pa_reserve_wrapper_get(m->core, rname);
 318             pa_xfree(rname);
 319
 320             if (!reserve)
 321                 goto fail;
 322         }
 323     }
 324
 325 #ifdef HAVE_UDEV
 326     fn = pa_udev_get_property(alsa_card_index, "PULSE_PROFILE_SET");
 327 #endif
 328
 329     u->profile_set = pa_alsa_profile_set_new(fn, &u->core->default_channel_map);
 330     pa_xfree(fn);
 331
 332     if (!u->profile_set)
 333         goto fail;
 334
 335     pa_alsa_profile_set_probe(u->profile_set, u->device_id, &m->core->default_sample_spec, m->core->default_n_fragments, m->core->default_fragment_size_msec);
 336
 337     pa_card_new_data_init(&data);
 338     data.driver = __FILE__;
 339     data.module = m;
 340
 341     pa_alsa_init_proplist_card(m->core, data.proplist, alsa_card_index);
 342
 343     pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->device_id);
 344     pa_alsa_init_description(data.proplist);
 345     set_card_name(&data, ma, u->device_id);
 346
 347     /* We need to give pa_modargs_get_value_boolean() a pointer to a local
 348      * variable instead of using &data.namereg_fail directly, because
 349      * data.namereg_fail is a bitfield and taking the address of a bitfield
 350      * variable is impossible. */
 351     namereg_fail = data.namereg_fail;
 352     if (pa_modargs_get_value_boolean(ma, "namereg_fail", &namereg_fail) < 0) {
 353         pa_log("Failed to parse boolean argument namereg_fail.");
 354         pa_card_new_data_done(&data);
 355         goto fail;
 356     }
 357     data.namereg_fail = namereg_fail;
 358
 359     if (reserve)
 360         if ((description = pa_proplist_gets(data.proplist, PA_PROP_DEVICE_DESCRIPTION)))
 361             pa_reserve_wrapper_set_application_device_name(reserve, description);
 362
 363     data.profiles = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 364     add_profiles(u, data.profiles);
 365
 366     if (pa_hashmap_isempty(data.profiles)) {
 367         pa_log("Failed to find a working profile.");
 368         pa_card_new_data_done(&data);
 369         goto fail;
 370     }
 371
 372     add_disabled_profile(data.profiles);
 373
 374     if (pa_modargs_get_proplist(ma, "card_properties", data.proplist, PA_UPDATE_REPLACE) < 0) {
 375         pa_log("Invalid properties");
 376         pa_card_new_data_done(&data);
 377         goto fail;
 378     }
 379
 380     u->card = pa_card_new(m->core, &data);
 381     pa_card_new_data_done(&data);
 382
 383     if (!u->card)
 384         goto fail;
 385
 386     u->card->userdata = u;
 387     u->card->set_profile = card_set_profile;
 388
 389     init_profile(u);
 390
 391     if (reserve)
 392         pa_reserve_wrapper_unref(reserve);
 393
 394     return 0;
 395
 396 fail:
 397     if (reserve)
 398         pa_reserve_wrapper_unref(reserve);
 399
 400     pa__done(m);
 401
 402     return -1;
 403 }
 404
 405 int pa__get_n_used(pa_module *m) {
 406     struct userdata *u;
 407     int n = 0;
 408     uint32_t idx;
 409     pa_sink *sink;
 410     pa_source *source;
 411
 412     pa_assert(m);
 413     pa_assert_se(u = m->userdata);
 414     pa_assert(u->card);
 415
 416     PA_IDXSET_FOREACH(sink, u->card->sinks, idx)
 417         n += pa_sink_linked_by(sink);
 418
 419     PA_IDXSET_FOREACH(source, u->card->sources, idx)
 420         n += pa_source_linked_by(source);
 421
 422     return n;
 423 }
 424
 425 void pa__done(pa_module*m) {
 426     struct userdata *u;
 427
 428     pa_assert(m);
 429
 430     if (!(u = m->userdata))
 431         goto finish;
 432
 433     if (u->card && u->card->sinks) {
 434         pa_sink *s;
 435
 436         while ((s = pa_idxset_steal_first(u->card->sinks, NULL)))
 437             pa_alsa_sink_free(s);
 438     }
 439
 440     if (u->card && u->card->sources) {
 441         pa_source *s;
 442
 443         while ((s = pa_idxset_steal_first(u->card->sources, NULL)))
 444             pa_alsa_source_free(s);
 445     }
 446
 447     if (u->card)
 448         pa_card_free(u->card);
 449
 450     if (u->modargs)
 451         pa_modargs_free(u->modargs);
 452
 453     if (u->profile_set)
 454         pa_alsa_profile_set_free(u->profile_set);
 455
 456     pa_xfree(u->device_id);
 457     pa_xfree(u);
 458
 459 finish:
 460     pa_alsa_refcnt_dec();
 461 }