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 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 #include "alsa-util.h"
  36 #include "alsa-sink.h"
  37 #include "alsa-source.h"
  38 #include "module-alsa-card-symdef.h"
  39
  40 PA_MODULE_AUTHOR("Lennart Poettering");
  41 PA_MODULE_DESCRIPTION("ALSA Card");
  42 PA_MODULE_VERSION(PACKAGE_VERSION);
  43 PA_MODULE_LOAD_ONCE(FALSE);
  44 PA_MODULE_USAGE(
  45         "name=<name for the card/sink/source, to be prefixed> "
  46         "card_name=<name for card> "
  47         "sink_name=<name for sink> "
  48         "source_name=<name for source> "
  49         "device_id=<ALSA card index> "
  50         "format=<sample format> "
  51         "rate=<sample rate> "
  52         "fragments=<number of fragments> "
  53         "fragment_size=<fragment size> "
  54         "mmap=<enable memory mapping?> "
  55         "tsched=<enable system timer based scheduling mode?> "
  56         "tsched_buffer_size=<buffer size when using timer based scheduling> "
  57         "tsched_buffer_watermark=<lower fill watermark> "
  58         "profile=<profile name> "
  59         "ignore_dB=<ignore dB information from the device?>");
  60
  61 static const char* const valid_modargs[] = {
  62     "name",
  63     "card_name",
  64     "sink_name",
  65     "source_name",
  66     "device_id",
  67     "format",
  68     "rate",
  69     "fragments",
  70     "fragment_size",
  71     "mmap",
  72     "tsched",
  73     "tsched_buffer_size",
  74     "tsched_buffer_watermark",
  75     "profile",
  76     "ignore_dB",
  77     NULL
  78 };
  79
  80 #define DEFAULT_DEVICE_ID "0"
  81
  82 struct userdata {
  83     pa_core *core;
  84     pa_module *module;
  85
  86     char *device_id;
  87
  88     pa_card *card;
  89     pa_sink *sink;
  90     pa_source *source;
  91
  92     pa_modargs *modargs;
  93
  94     pa_hashmap *profiles;
  95 };
  96
  97 struct profile_data {
  98     const pa_alsa_profile_info *sink_profile, *source_profile;
  99 };
 100
 101 static void enumerate_cb(
 102         const pa_alsa_profile_info *sink,
 103         const pa_alsa_profile_info *source,
 104         void *userdata) {
 105
 106     struct userdata *u = userdata;
 107     char *t, *n;
 108     pa_card_profile *p;
 109     struct profile_data *d;
 110     unsigned bonus = 0;
 111
 112     if (sink && source) {
 113         n = pa_sprintf_malloc("output-%s+input-%s", sink->name, source->name);
 114         t = pa_sprintf_malloc(_("Output %s + Input %s"), sink->description, _(source->description));
 115     } else if (sink) {
 116         n = pa_sprintf_malloc("output-%s", sink->name);
 117         t = pa_sprintf_malloc(_("Output %s"), _(sink->description));
 118     } else {
 119         pa_assert(source);
 120         n = pa_sprintf_malloc("input-%s", source->name);
 121         t = pa_sprintf_malloc(_("Input %s"), _(source->description));
 122     }
 123
 124     if (sink) {
 125         if (pa_channel_map_equal(&sink->map, &u->core->default_channel_map))
 126             bonus += 50000;
 127         else if (sink->map.channels == u->core->default_channel_map.channels)
 128             bonus += 40000;
 129     }
 130
 131     if (source) {
 132         if (pa_channel_map_equal(&source->map, &u->core->default_channel_map))
 133             bonus += 30000;
 134         else if (source->map.channels == u->core->default_channel_map.channels)
 135             bonus += 20000;
 136     }
 137
 138     pa_log_info("Found output profile '%s'", t);
 139
 140     p = pa_card_profile_new(n, t, sizeof(struct profile_data));
 141
 142     pa_xfree(t);
 143     pa_xfree(n);
 144
 145     p->priority =
 146         (sink ? sink->priority : 0) * 100 +
 147         (source ? source->priority : 0) +
 148         bonus;
 149
 150     p->n_sinks = !!sink;
 151     p->n_sources = !!source;
 152
 153     if (sink)
 154         p->max_sink_channels = sink->map.channels;
 155     if (source)
 156         p->max_source_channels = source->map.channels;
 157
 158     d = PA_CARD_PROFILE_DATA(p);
 159
 160     d->sink_profile = sink;
 161     d->source_profile = source;
 162
 163     pa_hashmap_put(u->profiles, p->name, p);
 164 }
 165
 166 static void add_disabled_profile(pa_hashmap *profiles) {
 167     pa_card_profile *p;
 168     struct profile_data *d;
 169
 170     p = pa_card_profile_new("off", _("Off"), sizeof(struct profile_data));
 171
 172     d = PA_CARD_PROFILE_DATA(p);
 173     d->sink_profile = d->source_profile = NULL;
 174
 175     pa_hashmap_put(profiles, p->name, p);
 176 }
 177
 178 static int card_set_profile(pa_card *c, pa_card_profile *new_profile) {
 179     struct userdata *u;
 180     struct profile_data *nd, *od;
 181
 182     pa_assert(c);
 183     pa_assert(new_profile);
 184     pa_assert_se(u = c->userdata);
 185
 186     nd = PA_CARD_PROFILE_DATA(new_profile);
 187     od = PA_CARD_PROFILE_DATA(c->active_profile);
 188
 189     if (od->sink_profile != nd->sink_profile) {
 190         pa_queue *inputs = NULL;
 191
 192         if (u->sink) {
 193             if (nd->sink_profile)
 194                 inputs = pa_sink_move_all_start(u->sink);
 195
 196             pa_alsa_sink_free(u->sink);
 197             u->sink = NULL;
 198         }
 199
 200         if (nd->sink_profile) {
 201             u->sink = pa_alsa_sink_new(c->module, u->modargs, __FILE__, c, nd->sink_profile);
 202
 203             if (inputs) {
 204                 if (u->sink)
 205                     pa_sink_move_all_finish(u->sink, inputs, FALSE);
 206                 else
 207                     pa_sink_move_all_fail(inputs);
 208             }
 209         }
 210     }
 211
 212     if (od->source_profile != nd->source_profile) {
 213         pa_queue *outputs = NULL;
 214
 215         if (u->source) {
 216             if (nd->source_profile)
 217                 outputs = pa_source_move_all_start(u->source);
 218
 219             pa_alsa_source_free(u->source);
 220             u->source = NULL;
 221         }
 222
 223         if (nd->source_profile) {
 224             u->source = pa_alsa_source_new(c->module, u->modargs, __FILE__, c, nd->source_profile);
 225
 226             if (outputs) {
 227                 if (u->source)
 228                     pa_source_move_all_finish(u->source, outputs, FALSE);
 229                 else
 230                     pa_source_move_all_fail(outputs);
 231             }
 232         }
 233     }
 234
 235     return 0;
 236 }
 237
 238 static void init_profile(struct userdata *u) {
 239     struct profile_data *d;
 240
 241     pa_assert(u);
 242
 243     d = PA_CARD_PROFILE_DATA(u->card->active_profile);
 244
 245     if (d->sink_profile)
 246         u->sink = pa_alsa_sink_new(u->module, u->modargs, __FILE__, u->card, d->sink_profile);
 247
 248     if (d->source_profile)
 249         u->source = pa_alsa_source_new(u->module, u->modargs, __FILE__, u->card, d->source_profile);
 250 }
 251
 252 static void set_card_name(pa_card_new_data *data, pa_modargs *ma, const char *device_id) {
 253     char *t;
 254     const char *n;
 255
 256     pa_assert(data);
 257     pa_assert(ma);
 258     pa_assert(device_id);
 259
 260     if ((n = pa_modargs_get_value(ma, "card_name", NULL))) {
 261         pa_card_new_data_set_name(data, n);
 262         data->namereg_fail = TRUE;
 263         return;
 264     }
 265
 266     if ((n = pa_modargs_get_value(ma, "name", NULL)))
 267         data->namereg_fail = TRUE;
 268     else {
 269         n = device_id;
 270         data->namereg_fail = FALSE;
 271     }
 272
 273     t = pa_sprintf_malloc("alsa_card.%s", n);
 274     pa_card_new_data_set_name(data, t);
 275     pa_xfree(t);
 276 }
 277
 278 int pa__init(pa_module *m) {
 279     pa_card_new_data data;
 280     pa_modargs *ma;
 281     int alsa_card_index;
 282     struct userdata *u;
 283     char rname[32];
 284     pa_reserve_wrapper *reserve = NULL;
 285     const char *description;
 286
 287     pa_alsa_redirect_errors_inc();
 288     snd_config_update_free_global();
 289
 290     pa_assert(m);
 291
 292     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 293         pa_log("Failed to parse module arguments");
 294         goto fail;
 295     }
 296
 297     m->userdata = u = pa_xnew(struct userdata, 1);
 298     u->core = m->core;
 299     u->module = m;
 300     u->device_id = pa_xstrdup(pa_modargs_get_value(ma, "device_id", DEFAULT_DEVICE_ID));
 301     u->card = NULL;
 302     u->sink = NULL;
 303     u->source = NULL;
 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, snd_strerror(alsa_card_index));
 308         goto fail;
 309     }
 310
 311     pa_snprintf(rname, sizeof(rname), "Audio%i", alsa_card_index);
 312
 313     if (!(reserve = pa_reserve_wrapper_get(m->core, rname)))
 314         goto fail;
 315
 316     pa_card_new_data_init(&data);
 317     data.driver = __FILE__;
 318     data.module = m;
 319     pa_alsa_init_proplist_card(m->core, data.proplist, alsa_card_index);
 320     pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->device_id);
 321     pa_alsa_init_description(data.proplist);
 322     set_card_name(&data, ma, u->device_id);
 323
 324     if (reserve)
 325         if ((description = pa_proplist_gets(data.proplist, PA_PROP_DEVICE_DESCRIPTION)))
 326             pa_reserve_wrapper_set_application_device_name(reserve, description);
 327
 328     u->profiles = data.profiles = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 329     if (pa_alsa_probe_profiles(u->device_id, &m->core->default_sample_spec, enumerate_cb, u) < 0) {
 330         pa_card_new_data_done(&data);
 331         goto fail;
 332     }
 333
 334     if (pa_hashmap_isempty(data.profiles)) {
 335         pa_log("Failed to find a working profile.");
 336         pa_card_new_data_done(&data);
 337         goto fail;
 338     }
 339
 340     add_disabled_profile(data.profiles);
 341
 342     u->card = pa_card_new(m->core, &data);
 343     pa_card_new_data_done(&data);
 344
 345     if (!u->card)
 346         goto fail;
 347
 348     u->card->userdata = u;
 349     u->card->set_profile = card_set_profile;
 350
 351     init_profile(u);
 352
 353     pa_reserve_wrapper_unref(reserve);
 354
 355     return 0;
 356
 357 fail:
 358     if (reserve)
 359         pa_reserve_wrapper_unref(reserve);
 360
 361     pa__done(m);
 362
 363     return -1;
 364 }
 365
 366 int pa__get_n_used(pa_module *m) {
 367     struct userdata *u;
 368
 369     pa_assert(m);
 370     pa_assert_se(u = m->userdata);
 371
 372     return
 373         (u->sink ? pa_sink_linked_by(u->sink) : 0) +
 374         (u->source ? pa_source_linked_by(u->source) : 0);
 375 }
 376
 377 void pa__done(pa_module*m) {
 378     struct userdata *u;
 379
 380     pa_assert(m);
 381
 382     if (!(u = m->userdata))
 383         goto finish;
 384
 385     if (u->sink)
 386         pa_alsa_sink_free(u->sink);
 387
 388     if (u->source)
 389         pa_alsa_source_free(u->source);
 390
 391     if (u->card)
 392         pa_card_free(u->card);
 393
 394     if (u->modargs)
 395         pa_modargs_free(u->modargs);
 396
 397     pa_xfree(u->device_id);
 398     pa_xfree(u);
 399
 400 finish:
 401     snd_config_update_free_global();
 402     pa_alsa_redirect_errors_dec();
 403 }