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