code.delx.au - pulseaudio/blob - src/pulsecore/namereg.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 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 2.1 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 <stdlib.h>
  27 #include <string.h>
  28 #include <string.h>
  29 #include <stdio.h>
  30
  31 #include <pulse/xmalloc.h>
  32
  33 #include <pulsecore/source.h>
  34 #include <pulsecore/sink.h>
  35 #include <pulsecore/core-subscribe.h>
  36 #include <pulsecore/core-util.h>
  37 #include <pulsecore/macro.h>
  38
  39 #include "namereg.h"
  40
  41 struct namereg_entry {
  42     pa_namereg_type_t type;
  43     char *name;
  44     void *data;
  45 };
  46
  47 static pa_bool_t is_valid_char(char c) {
  48     return
  49         (c >= 'a' && c <= 'z') ||
  50         (c >= 'A' && c <= 'Z') ||
  51         (c >= '0' && c <= '9') ||
  52         c == '.' ||
  53         c == '-' ||
  54         c == '_';
  55 }
  56
  57 pa_bool_t pa_namereg_is_valid_name(const char *name) {
  58     const char *c;
  59
  60     if (*name == 0)
  61         return FALSE;
  62
  63     for (c = name; *c && (c-name < PA_NAME_MAX); c++)
  64         if (!is_valid_char(*c))
  65             return FALSE;
  66
  67     if (*c)
  68         return FALSE;
  69
  70     return TRUE;
  71 }
  72
  73 char* pa_namereg_make_valid_name(const char *name) {
  74     const char *a;
  75     char *b, *n;
  76
  77     if (*name == 0)
  78         return NULL;
  79
  80     n = pa_xmalloc(strlen(name)+1);
  81
  82     for (a = name, b = n; *a && (a-name < PA_NAME_MAX); a++, b++)
  83         *b = (char) (is_valid_char(*a) ? *a : '_');
  84
  85     *b = 0;
  86
  87     return n;
  88 }
  89
  90 const char *pa_namereg_register(pa_core *c, const char *name, pa_namereg_type_t type, void *data, pa_bool_t fail) {
  91     struct namereg_entry *e;
  92     char *n = NULL;
  93
  94     pa_assert(c);
  95     pa_assert(name);
  96     pa_assert(data);
  97
  98     if (!*name)
  99         return NULL;
 100
 101     if ((type == PA_NAMEREG_SINK || type == PA_NAMEREG_SOURCE || type == PA_NAMEREG_CARD) &&
 102         !pa_namereg_is_valid_name(name)) {
 103
 104         if (fail)
 105             return NULL;
 106
 107         if (!(name = n = pa_namereg_make_valid_name(name)))
 108             return NULL;
 109     }
 110
 111     if ((e = pa_hashmap_get(c->namereg, name)) && fail) {
 112         pa_xfree(n);
 113         return NULL;
 114     }
 115
 116     if (e) {
 117         unsigned i;
 118         size_t l = strlen(name);
 119         char *k;
 120
 121         if (l+4 > PA_NAME_MAX) {
 122             pa_xfree(n);
 123             return NULL;
 124         }
 125
 126         k = pa_xmalloc(l+4);
 127
 128         for (i = 2; i <= 99; i++) {
 129             pa_snprintf(k, l+4, "%s.%u", name, i);
 130
 131             if (!(e = pa_hashmap_get(c->namereg, k)))
 132                 break;
 133         }
 134
 135         if (e) {
 136             pa_xfree(n);
 137             pa_xfree(k);
 138             return NULL;
 139         }
 140
 141         pa_xfree(n);
 142         n = k;
 143     }
 144
 145     e = pa_xnew(struct namereg_entry, 1);
 146     e->type = type;
 147     e->name = n ? n : pa_xstrdup(name);
 148     e->data = data;
 149
 150     pa_assert_se(pa_hashmap_put(c->namereg, e->name, e) >= 0);
 151
 152     if (type == PA_NAMEREG_SINK && !c->default_sink)
 153         pa_namereg_set_default_sink(c, data);
 154     else if (type == PA_NAMEREG_SOURCE && !c->default_source)
 155         pa_namereg_set_default_source(c, data);
 156
 157     return e->name;
 158 }
 159
 160 void pa_namereg_unregister(pa_core *c, const char *name) {
 161     struct namereg_entry *e;
 162     uint32_t idx;
 163
 164     pa_assert(c);
 165     pa_assert(name);
 166
 167     pa_assert_se(e = pa_hashmap_remove(c->namereg, name));
 168
 169     if (c->default_sink == e->data) {
 170         pa_sink *new_default = NULL;
 171
 172         /* FIXME: the selection here should be based priority values on
 173          * the sinks */
 174
 175         PA_IDXSET_FOREACH(new_default, c->sinks, idx) {
 176             if (new_default != e->data && PA_SINK_IS_LINKED(pa_sink_get_state(new_default)))
 177                 break;
 178         }
 179
 180         pa_namereg_set_default_sink(c, new_default);
 181
 182     } else if (c->default_source == e->data) {
 183         pa_source *new_default = NULL;
 184
 185         /* First, try to find one that isn't a monitor */
 186         PA_IDXSET_FOREACH(new_default, c->sources, idx) {
 187             if (new_default != e->data && !new_default->monitor_of && PA_SOURCE_IS_LINKED(pa_source_get_state(new_default)))
 188                 break;
 189         }
 190
 191         if (!new_default) {
 192             /* Then, fallback to a monitor */
 193             PA_IDXSET_FOREACH(new_default, c->sources, idx) {
 194                 if (new_default != e->data && PA_SOURCE_IS_LINKED(pa_source_get_state(new_default)))
 195                     break;
 196             }
 197         }
 198
 199         pa_namereg_set_default_source(c, new_default);
 200     }
 201
 202     pa_xfree(e->name);
 203     pa_xfree(e);
 204 }
 205
 206 void* pa_namereg_get(pa_core *c, const char *name, pa_namereg_type_t type) {
 207     struct namereg_entry *e;
 208     uint32_t idx;
 209     pa_assert(c);
 210
 211     if (type == PA_NAMEREG_SOURCE && (!name || pa_streq(name, "@DEFAULT_SOURCE@"))) {
 212         pa_source *s;
 213
 214         if ((s = pa_namereg_get_default_source(c)))
 215             return s;
 216
 217     } else if (type == PA_NAMEREG_SINK && (!name || pa_streq(name, "@DEFAULT_SINK@"))) {
 218         pa_sink *s;
 219
 220         if ((s = pa_namereg_get_default_sink(c)))
 221             return s;
 222
 223     } else if (type == PA_NAMEREG_SOURCE && name && pa_streq(name, "@DEFAULT_MONITOR@")) {
 224         pa_sink *s;
 225
 226         if ((s = pa_namereg_get(c, NULL, PA_NAMEREG_SINK)))
 227             return s->monitor_source;
 228     }
 229
 230     if (!name)
 231         return NULL;
 232
 233     if ((type == PA_NAMEREG_SINK || type == PA_NAMEREG_SOURCE || type == PA_NAMEREG_CARD) &&
 234         !pa_namereg_is_valid_name(name))
 235         return NULL;
 236
 237     if ((e = pa_hashmap_get(c->namereg, name)))
 238         if (e->type == type)
 239             return e->data;
 240
 241     if (pa_atou(name, &idx) < 0)
 242         return NULL;
 243
 244     if (type == PA_NAMEREG_SINK)
 245         return pa_idxset_get_by_index(c->sinks, idx);
 246     else if (type == PA_NAMEREG_SOURCE)
 247         return pa_idxset_get_by_index(c->sources, idx);
 248     else if (type == PA_NAMEREG_SAMPLE && c->scache)
 249         return pa_idxset_get_by_index(c->scache, idx);
 250     else if (type == PA_NAMEREG_CARD)
 251         return pa_idxset_get_by_index(c->cards, idx);
 252
 253     return NULL;
 254 }
 255
 256 pa_sink* pa_namereg_set_default_sink(pa_core*c, pa_sink *s) {
 257     pa_assert(c);
 258
 259     if (s && !PA_SINK_IS_LINKED(pa_sink_get_state(s)))
 260         return NULL;
 261
 262     if (c->default_sink != s) {
 263         c->default_sink = s;
 264         pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_SERVER|PA_SUBSCRIPTION_EVENT_CHANGE, PA_INVALID_INDEX);
 265     }
 266
 267     return s;
 268 }
 269
 270 pa_source* pa_namereg_set_default_source(pa_core*c, pa_source *s) {
 271     pa_assert(c);
 272
 273     if (s && !PA_SOURCE_IS_LINKED(pa_source_get_state(s)))
 274         return NULL;
 275
 276     if (c->default_source != s) {
 277         c->default_source = s;
 278         pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_SERVER|PA_SUBSCRIPTION_EVENT_CHANGE, PA_INVALID_INDEX);
 279     }
 280
 281     return s;
 282 }
 283
 284 /* XXX: After removing old functionality, has this function become useless? */
 285 pa_sink *pa_namereg_get_default_sink(pa_core *c) {
 286     pa_sink *s;
 287     uint32_t idx;
 288
 289     pa_assert(c);
 290
 291     if (!c->default_sink || PA_SINK_IS_LINKED(pa_sink_get_state(c->default_sink)))
 292         return c->default_sink;
 293
 294     /* The old default sink has become unlinked, set a new one. */
 295
 296     /* FIXME: the selection here should be based priority values on
 297      * the sinks */
 298
 299     PA_IDXSET_FOREACH(s, c->sinks, idx)
 300         if (PA_SINK_IS_LINKED(pa_sink_get_state(s)))
 301             return pa_namereg_set_default_sink(c, s);
 302
 303     return pa_namereg_set_default_sink(c, NULL);
 304 }
 305
 306 /* XXX: After removing old functionality, has this function become useless? */
 307 pa_source *pa_namereg_get_default_source(pa_core *c) {
 308     pa_source *s;
 309     uint32_t idx;
 310
 311     pa_assert(c);
 312
 313     if (!c->default_source || PA_SOURCE_IS_LINKED(pa_source_get_state(c->default_source)))
 314         return c->default_source;
 315
 316     /* The old default source has become unlinked, set a new one. */
 317
 318     /* First, try to find one that isn't a monitor */
 319     PA_IDXSET_FOREACH(s, c->sources, idx)
 320         if (!s->monitor_of && PA_SOURCE_IS_LINKED(pa_source_get_state(s)))
 321             return pa_namereg_set_default_source(c, s);
 322
 323     /* Then, fallback to a monitor */
 324     PA_IDXSET_FOREACH(s, c->sources, idx)
 325         if (PA_SOURCE_IS_LINKED(pa_source_get_state(s)))
 326             return pa_namereg_set_default_source(c, s);
 327
 328     return pa_namereg_set_default_source(c, NULL);
 329 }