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