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 <pulsecore/core-util.h>
  28 #include <pulsecore/modargs.h>
  29 #include <pulsecore/queue.h>
  30
  31 #include "alsa-util.h"
  32 #include "alsa-sink.h"
  33 #include "alsa-source.h"
  34 #include "module-alsa-card-symdef.h"
  35
  36 PA_MODULE_AUTHOR("Lennart Poettering");
  37 PA_MODULE_DESCRIPTION("ALSA Card");
  38 PA_MODULE_VERSION(PACKAGE_VERSION);
  39 PA_MODULE_LOAD_ONCE(FALSE);
  40 PA_MODULE_USAGE(
  41         "name=<name for the card/sink/source, to be prefixed> "
  42         "card_name=<name for card> "
  43         "sink_name=<name for sink> "
  44         "source_name=<name for source> "
  45         "device_id=<ALSA card index> "
  46         "format=<sample format> "
  47         "rate=<sample rate> "
  48         "fragments=<number of fragments> "
  49         "fragment_size=<fragment size> "
  50         "mmap=<enable memory mapping?> "
  51         "tsched=<enable system timer based scheduling mode?> "
  52         "tsched_buffer_size=<buffer size when using timer based scheduling> "
  53         "tsched_buffer_watermark=<lower fill watermark> "
  54         "profile=<profile name> "
  55         "ignore_dB=<ignore dB information from the device?>");
  56
  57 static const char* const valid_modargs[] = {
  58     "name",
  59     "card_name",
  60     "sink_name",
  61     "source_name",
  62     "device_id",
  63     "format",
  64     "rate",
  65     "fragments",
  66     "fragment_size",
  67     "mmap",
  68     "tsched",
  69     "tsched_buffer_size",
  70     "tsched_buffer_watermark",
  71     "profile",
  72     "ignore_dB",
  73     NULL
  74 };
  75
  76 #define DEFAULT_DEVICE_ID "0"
  77
  78 struct userdata {
  79     pa_core *core;
  80     pa_module *module;
  81
  82     char *device_id;
  83
  84     pa_card *card;
  85     pa_sink *sink;
  86     pa_source *source;
  87
  88     pa_modargs *modargs;
  89 };
  90
  91 struct profile_data {
  92     const pa_alsa_profile_info *sink_profile, *source_profile;
  93 };
  94
  95 static void enumerate_cb(
  96         const pa_alsa_profile_info *sink,
  97         const pa_alsa_profile_info *source,
  98         void *userdata) {
  99
 100     pa_hashmap *profiles = (pa_hashmap *) userdata;
 101     char *t, *n;
 102     pa_card_profile *p;
 103     struct profile_data *d;
 104
 105     if (sink && source) {
 106         n = pa_sprintf_malloc("output-%s+input-%s", sink->name, source->name);
 107         t = pa_sprintf_malloc("Output %s + Input %s", sink->description, source->description);
 108     } else if (sink) {
 109         n = pa_sprintf_malloc("output-%s", sink->name);
 110         t = pa_sprintf_malloc("Output %s", sink->description);
 111     } else {
 112         pa_assert(source);
 113         n = pa_sprintf_malloc("input-%s", source->name);
 114         t = pa_sprintf_malloc("Input %s", source->description);
 115     }
 116
 117     pa_log_info("Found output profile '%s'", t);
 118
 119     p = pa_card_profile_new(n, t, sizeof(struct profile_data));
 120
 121     pa_xfree(t);
 122     pa_xfree(n);
 123
 124     p->priority = (sink ? sink->priority : 0)*100 + (source ? source->priority : 0);
 125     p->n_sinks = !!sink;
 126     p->n_sources = !!source;
 127
 128     if (sink)
 129         p->max_sink_channels = sink->map.channels;
 130     if (source)
 131         p->max_source_channels = source->map.channels;
 132
 133     d = PA_CARD_PROFILE_DATA(p);
 134
 135     d->sink_profile = sink;
 136     d->source_profile = source;
 137
 138     pa_hashmap_put(profiles, p->name, p);
 139 }
 140
 141 static void add_disabled_profile(pa_hashmap *profiles) {
 142     pa_card_profile *p;
 143     struct profile_data *d;
 144
 145     p = pa_card_profile_new("off", "Off", sizeof(struct profile_data));
 146
 147     d = PA_CARD_PROFILE_DATA(p);
 148     d->sink_profile = d->source_profile = NULL;
 149
 150     pa_hashmap_put(profiles, p->name, p);
 151 }
 152
 153 static int card_set_profile(pa_card *c, pa_card_profile *new_profile) {
 154     struct userdata *u;
 155     struct profile_data *nd, *od;
 156
 157     pa_assert(c);
 158     pa_assert(new_profile);
 159     pa_assert_se(u = c->userdata);
 160
 161     nd = PA_CARD_PROFILE_DATA(new_profile);
 162     od = PA_CARD_PROFILE_DATA(c->active_profile);
 163
 164     if (od->sink_profile != nd->sink_profile) {
 165         pa_queue *inputs = NULL;
 166
 167         if (u->sink) {
 168             if (nd->sink_profile)
 169                 inputs = pa_sink_move_all_start(u->sink);
 170
 171             pa_alsa_sink_free(u->sink);
 172             u->sink = NULL;
 173         }
 174
 175         if (nd->sink_profile) {
 176             u->sink = pa_alsa_sink_new(c->module, u->modargs, __FILE__, c, nd->sink_profile);
 177
 178             if (inputs) {
 179                 if (u->sink)
 180                     pa_sink_move_all_finish(u->sink, inputs);
 181                 else
 182                     pa_sink_move_all_fail(inputs);
 183             }
 184         }
 185     }
 186
 187     if (od->source_profile != nd->source_profile) {
 188         pa_queue *outputs = NULL;
 189
 190         if (u->source) {
 191             if (nd->source_profile)
 192                 outputs = pa_source_move_all_start(u->source);
 193
 194             pa_alsa_source_free(u->source);
 195             u->source = NULL;
 196         }
 197
 198         if (nd->source_profile) {
 199             u->source = pa_alsa_source_new(c->module, u->modargs, __FILE__, c, nd->source_profile);
 200
 201             if (outputs) {
 202                 if (u->source)
 203                     pa_source_move_all_finish(u->source, outputs);
 204                 else
 205                     pa_source_move_all_fail(outputs);
 206             }
 207         }
 208     }
 209
 210     return 0;
 211 }
 212
 213 static void init_profile(struct userdata *u) {
 214     struct profile_data *d;
 215
 216     pa_assert(u);
 217
 218     d = PA_CARD_PROFILE_DATA(u->card->active_profile);
 219
 220     if (d->sink_profile)
 221         u->sink = pa_alsa_sink_new(u->module, u->modargs, __FILE__, u->card, d->sink_profile);
 222
 223     if (d->source_profile)
 224         u->source = pa_alsa_source_new(u->module, u->modargs, __FILE__, u->card, d->source_profile);
 225 }
 226
 227 static void set_card_name(pa_card_new_data *data, pa_modargs *ma, const char *device_id) {
 228     char *t;
 229     const char *n;
 230
 231     pa_assert(data);
 232     pa_assert(ma);
 233     pa_assert(device_id);
 234
 235     if ((n = pa_modargs_get_value(ma, "card_name", NULL))) {
 236         pa_card_new_data_set_name(data, n);
 237         data->namereg_fail = TRUE;
 238         return;
 239     }
 240
 241     if ((n = pa_modargs_get_value(ma, "name", NULL)))
 242         data->namereg_fail = TRUE;
 243     else {
 244         n = device_id;
 245         data->namereg_fail = FALSE;
 246     }
 247
 248     t = pa_sprintf_malloc("alsa_card.%s", n);
 249     pa_card_new_data_set_name(data, t);
 250     pa_xfree(t);
 251 }
 252
 253 int pa__init(pa_module*m) {
 254     pa_card_new_data data;
 255     pa_modargs *ma;
 256     int alsa_card_index;
 257     struct userdata *u;
 258
 259     pa_alsa_redirect_errors_inc();
 260     snd_config_update_free_global();
 261
 262     pa_assert(m);
 263
 264     if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
 265         pa_log("Failed to parse module arguments");
 266         goto fail;
 267     }
 268
 269     m->userdata = u = pa_xnew(struct userdata, 1);
 270     u->core = m->core;
 271     u->module = m;
 272     u->device_id = pa_xstrdup(pa_modargs_get_value(ma, "device_id", DEFAULT_DEVICE_ID));
 273     u->card = NULL;
 274     u->sink = NULL;
 275     u->source = NULL;
 276     u->modargs = ma;
 277
 278     if ((alsa_card_index = snd_card_get_index(u->device_id)) < 0) {
 279         pa_log("Card '%s' doesn't exist: %s", u->device_id, snd_strerror(alsa_card_index));
 280         goto fail;
 281     }
 282
 283     pa_card_new_data_init(&data);
 284     data.driver = __FILE__;
 285     data.module = m;
 286     pa_alsa_init_proplist_card(m->core, data.proplist, alsa_card_index);
 287     pa_proplist_sets(data.proplist, PA_PROP_DEVICE_STRING, u->device_id);
 288     set_card_name(&data, ma, u->device_id);
 289
 290     data.profiles = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 291     if (pa_alsa_probe_profiles(u->device_id, &m->core->default_sample_spec, enumerate_cb, data.profiles) < 0) {
 292         pa_card_new_data_done(&data);
 293         goto fail;
 294     }
 295
 296     if (pa_hashmap_isempty(data.profiles)) {
 297         pa_log("Failed to find a working profile.");
 298         pa_card_new_data_done(&data);
 299         goto fail;
 300     }
 301
 302     add_disabled_profile(data.profiles);
 303
 304     u->card = pa_card_new(m->core, &data);
 305     pa_card_new_data_done(&data);
 306
 307     if (!u->card)
 308         goto fail;
 309
 310     u->card->userdata = u;
 311     u->card->set_profile = card_set_profile;
 312
 313     init_profile(u);
 314
 315     return 0;
 316
 317 fail:
 318
 319     pa__done(m);
 320     return -1;
 321 }
 322
 323 int pa__get_n_used(pa_module *m) {
 324     struct userdata *u;
 325
 326     pa_assert(m);
 327     pa_assert_se(u = m->userdata);
 328
 329     return
 330         (u->sink ? pa_sink_linked_by(u->sink) : 0) +
 331         (u->source ? pa_source_linked_by(u->source) : 0);
 332 }
 333
 334 void pa__done(pa_module*m) {
 335     struct userdata *u;
 336
 337     pa_assert(m);
 338
 339     if (!(u = m->userdata))
 340         goto finish;
 341
 342     if (u->sink)
 343         pa_alsa_sink_free(u->sink);
 344
 345     if (u->source)
 346         pa_alsa_source_free(u->source);
 347
 348     if (u->card)
 349         pa_card_free(u->card);
 350
 351     if (u->modargs)
 352         pa_modargs_free(u->modargs);
 353
 354     pa_xfree(u->device_id);
 355     pa_xfree(u);
 356
 357 finish:
 358     snd_config_update_free_global();
 359     pa_alsa_redirect_errors_dec();
 360 }