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