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 "alsa-util.h"
  34 #include "alsa-sink.h"
  35 #include "alsa-source.h"
  36 #include "module-alsa-card-symdef.h"
  37
  38 PA_MODULE_AUTHOR("Lennart Poettering");
  39 PA_MODULE_DESCRIPTION("ALSA Card");
  40 PA_MODULE_VERSION(PACKAGE_VERSION);
  41 PA_MODULE_LOAD_ONCE(FALSE);
  42 PA_MODULE_USAGE(
  43         "name=<name for the card/sink/source, to be prefixed> "
  44         "card_name=<name for card> "
  45         "sink_name=<name for sink> "
  46         "source_name=<name for source> "
  47         "device_id=<ALSA card index> "
  48         "format=<sample format> "
  49         "rate=<sample rate> "
  50         "fragments=<number of fragments> "
  51         "fragment_size=<fragment size> "
  52         "mmap=<enable memory mapping?> "
  53         "tsched=<enable system timer based scheduling mode?> "
  54         "tsched_buffer_size=<buffer size when using timer based scheduling> "
  55         "tsched_buffer_watermark=<lower fill watermark> "
  56         "profile=<profile name> "
  57         "ignore_dB=<ignore dB information from the device?>");
  58
  59 static const char* const valid_modargs[] = {
  60     "name",
  61     "card_name",
  62     "sink_name",
  63     "source_name",
  64     "device_id",
  65     "format",
  66     "rate",
  67     "fragments",
  68     "fragment_size",
  69     "mmap",
  70     "tsched",
  71     "tsched_buffer_size",
  72     "tsched_buffer_watermark",
  73     "profile",
  74     "ignore_dB",
  75     NULL
  76 };
  77
  78 #define DEFAULT_DEVICE_ID "0"
  79
  80 struct userdata {
  81     pa_core *core;
  82     pa_module *module;
  83
  84     char *device_id;
  85
  86     pa_card *card;
  87     pa_sink *sink;
  88     pa_source *source;
  89
  90     pa_modargs *modargs;
  91 };
  92
  93 struct profile_data {
  94     const pa_alsa_profile_info *sink_profile, *source_profile;
  95 };
  96
  97 static void enumerate_cb(
  98         const pa_alsa_profile_info *sink,
  99         const pa_alsa_profile_info *source,
 100         void *userdata) {
 101
 102     pa_hashmap *profiles = (pa_hashmap *) userdata;
 103     char *t, *n;
 104     pa_card_profile *p;
 105     struct profile_data *d;
 106
 107     if (sink && source) {
 108         n = pa_sprintf_malloc("output-%s+input-%s", sink->name, source->name);
 109         t = pa_sprintf_malloc(_("Output %s + Input %s"), sink->description, _(source->description));
 110     } else if (sink) {
 111         n = pa_sprintf_malloc("output-%s", sink->name);
 112         t = pa_sprintf_malloc(_("Output %s"), _(sink->description));
 113     } else {
 114         pa_assert(source);
 115         n = pa_sprintf_malloc("input-%s", source->name);
 116         t = pa_sprintf_malloc(_("Input %s"), _(source->description));
 117     }
 118
 119     pa_log_info("Found output profile '%s'", t);
 120
 121     p = pa_card_profile_new(n, t, sizeof(struct profile_data));
 122
 123     pa_xfree(t);
 124     pa_xfree(n);
 125
 126     p->priority = (sink ? sink->priority : 0)*100 + (source ? source->priority : 0);
 127     p->n_sinks = !!sink;
 128     p->n_sources = !!source;
 129
 130     if (sink)
 131         p->max_sink_channels = sink->map.channels;
 132     if (source)
 133         p->max_source_channels = source->map.channels;
 134
 135     d = PA_CARD_PROFILE_DATA(p);
 136
 137     d->sink_profile = sink;
 138     d->source_profile = source;
 139
 140     pa_hashmap_put(profiles, p->name, p);
 141 }
 142
 143 static void add_disabled_profile(pa_hashmap *profiles) {
 144     pa_card_profile *p;
 145     struct profile_data *d;
 146
 147     p = pa_card_profile_new("off", _("Off"), sizeof(struct profile_data));
 148
 149     d = PA_CARD_PROFILE_DATA(p);
 150     d->sink_profile = d->source_profile = NULL;
 151
 152     pa_hashmap_put(profiles, p->name, p);
 153 }
 154
 155 static int card_set_profile(pa_card *c, pa_card_profile *new_profile) {
 156     struct userdata *u;
 157     struct profile_data *nd, *od;
 158
 159     pa_assert(c);
 160     pa_assert(new_profile);
 161     pa_assert_se(u = c->userdata);
 162
 163     nd = PA_CARD_PROFILE_DATA(new_profile);
 164     od = PA_CARD_PROFILE_DATA(c->active_profile);
 165
 166     if (od->sink_profile != nd->sink_profile) {
 167         pa_queue *inputs = NULL;
 168
 169         if (u->sink) {
 170             if (nd->sink_profile)
 171                 inputs = pa_sink_move_all_start(u->sink);
 172
 173             pa_alsa_sink_free(u->sink);
 174             u->sink = NULL;
 175         }
 176
 177         if (nd->sink_profile) {
 178             u->sink = pa_alsa_sink_new(c->module, u->modargs, __FILE__, c, nd->sink_profile);
 179
 180             if (inputs) {
 181                 if (u->sink)
 182                     pa_sink_move_all_finish(u->sink, inputs, FALSE);
 183                 else
 184                     pa_sink_move_all_fail(inputs);
 185             }
 186         }
 187     }
 188
 189     if (od->source_profile != nd->source_profile) {
 190         pa_queue *outputs = NULL;
 191
 192         if (u->source) {
 193             if (nd->source_profile)
 194                 outputs = pa_source_move_all_start(u->source);
 195
 196             pa_alsa_source_free(u->source);
 197             u->source = NULL;
 198         }
 199
 200         if (nd->source_profile) {
 201             u->source = pa_alsa_source_new(c->module, u->modargs, __FILE__, c, nd->source_profile);
 202
 203             if (outputs) {
 204                 if (u->source)
 205                     pa_source_move_all_finish(u->source, outputs, FALSE);
 206                 else
 207                     pa_source_move_all_fail(outputs);
 208             }
 209         }
 210     }
 211
 212     return 0;
 213 }
 214
 215 static void init_profile(struct userdata *u) {
 216     struct profile_data *d;
 217
 218     pa_assert(u);
 219
 220     d = PA_CARD_PROFILE_DATA(u->card->active_profile);
 221
 222     if (d->sink_profile)
 223         u->sink = pa_alsa_sink_new(u->module, u->modargs, __FILE__, u->card, d->sink_profile);
 224
 225     if (d->source_profile)
 226         u->source = pa_alsa_source_new(u->module, u->modargs, __FILE__, u->card, d->source_profile);
 227 }
 228
 229 static void set_card_name(pa_card_new_data *data, pa_modargs *ma, const char *device_id) {
 230     char *t;
 231     const char *n;
 232
 233     pa_assert(data);
 234     pa_assert(ma);
 235     pa_assert(device_id);
 236
 237     if ((n = pa_modargs_get_value(ma, "card_name", NULL))) {
 238         pa_card_new_data_set_name(data, n);
 239         data->namereg_fail = TRUE;
 240         return;
 241     }
 242
 243     if ((n = pa_modargs_get_value(ma, "name", NULL)))
 244         data->namereg_fail = TRUE;
 245     else {
 246         n = device_id;
 247         data->namereg_fail = FALSE;
 248     }
 249
 250     t = pa_sprintf_malloc("alsa_card.%s", n);
 251     pa_card_new_data_set_name(data, t);
 252     pa_xfree(t);
 253 }
 254
 255 int pa__init(pa_module*m) {
 256     pa_card_new_data data;
 257     pa_modargs *ma;
 258     int alsa_card_index;
 259     struct userdata *u;
 260
 261     pa_alsa_redirect_errors_inc();
 262     snd_config_update_free_global();
 263
 264     pa_assert(m);
 265
 266     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 267         pa_log("Failed to parse module arguments");
 268         goto fail;
 269     }
 270
 271     m->userdata = u = pa_xnew(struct userdata, 1);
 272     u->core = m->core;
 273     u->module = m;
 274     u->device_id = pa_xstrdup(pa_modargs_get_value(ma, "device_id", DEFAULT_DEVICE_ID));
 275     u->card = NULL;
 276     u->sink = NULL;
 277     u->source = NULL;
 278     u->modargs = ma;
 279
 280     if ((alsa_card_index = snd_card_get_index(u->device_id)) < 0) {
 281         pa_log("Card '%s' doesn't exist: %s", u->device_id, snd_strerror(alsa_card_index));
 282         goto fail;
 283     }
 284
 285     pa_card_new_data_init(&data);
 286     data.driver = __FILE__;
 287     data.module = m;
 288     pa_alsa_init_proplist_card(m->core, data.proplist, alsa_card_index);
 289     pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->device_id);
 290     set_card_name(&data, ma, u->device_id);
 291
 292     data.profiles = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 293     if (pa_alsa_probe_profiles(u->device_id, &m->core->default_sample_spec, enumerate_cb, data.profiles) < 0) {
 294         pa_card_new_data_done(&data);
 295         goto fail;
 296     }
 297
 298     if (pa_hashmap_isempty(data.profiles)) {
 299         pa_log("Failed to find a working profile.");
 300         pa_card_new_data_done(&data);
 301         goto fail;
 302     }
 303
 304     add_disabled_profile(data.profiles);
 305
 306     u->card = pa_card_new(m->core, &data);
 307     pa_card_new_data_done(&data);
 308
 309     if (!u->card)
 310         goto fail;
 311
 312     u->card->userdata = u;
 313     u->card->set_profile = card_set_profile;
 314
 315     init_profile(u);
 316
 317     return 0;
 318
 319 fail:
 320
 321     pa__done(m);
 322     return -1;
 323 }
 324
 325 int pa__get_n_used(pa_module *m) {
 326     struct userdata *u;
 327
 328     pa_assert(m);
 329     pa_assert_se(u = m->userdata);
 330
 331     return
 332         (u->sink ? pa_sink_linked_by(u->sink) : 0) +
 333         (u->source ? pa_source_linked_by(u->source) : 0);
 334 }
 335
 336 void pa__done(pa_module*m) {
 337     struct userdata *u;
 338
 339     pa_assert(m);
 340
 341     if (!(u = m->userdata))
 342         goto finish;
 343
 344     if (u->sink)
 345         pa_alsa_sink_free(u->sink);
 346
 347     if (u->source)
 348         pa_alsa_source_free(u->source);
 349
 350     if (u->card)
 351         pa_card_free(u->card);
 352
 353     if (u->modargs)
 354         pa_modargs_free(u->modargs);
 355
 356     pa_xfree(u->device_id);
 357     pa_xfree(u);
 358
 359 finish:
 360     snd_config_update_free_global();
 361     pa_alsa_redirect_errors_dec();
 362 }