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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   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 <stdlib.h>
  27 #include <string.h>
  28 #include <assert.h>
  29 #include <string.h>
  30 #include <stdio.h>
  31
  32 #include <pulse/xmalloc.h>
  33
  34 #include <pulsecore/autoload.h>
  35 #include <pulsecore/source.h>
  36 #include <pulsecore/sink.h>
  37 #include <pulsecore/core-subscribe.h>
  38 #include <pulsecore/core-util.h>
  39
  40 #include "namereg.h"
  41
  42 struct namereg_entry {
  43     pa_namereg_type_t type;
  44     char *name;
  45     void *data;
  46 };
  47
  48 static int is_valid_char(char c) {
  49     return
  50         (c >= 'a' && c <= 'z') ||
  51         (c >= 'A' && c <= 'Z') ||
  52         (c >= '0' && c <= '9') ||
  53         c == '.' ||
  54         c == '_';
  55 }
  56
  57 int pa_namereg_is_valid_name(const char *name) {
  58     const char *c;
  59
  60     if (*name == 0)
  61         return 0;
  62
  63     for (c = name; *c && (c-name < PA_NAME_MAX); c++)
  64         if (!is_valid_char(*c))
  65             return 0;
  66
  67     if (*c)
  68         return 0;
  69
  70     return 1;
  71 }
  72
  73 char* pa_namereg_cleanup_name(const char *name) {
  74     const char *a;
  75     char *b, *n;
  76
  77     if (*name == 0)
  78         return NULL;
  79
  80     n = pa_xnew(char, strlen(name)+1);
  81
  82     for (a = name, b = n; *a && (a-name < PA_NAME_MAX); a++, b++)
  83         *b = is_valid_char(*a) ? *a : '_';
  84
  85     *b = 0;
  86
  87     return n;
  88 }
  89
  90 void pa_namereg_free(pa_core *c) {
  91     assert(c);
  92
  93     if (!c->namereg)
  94         return;
  95
  96     assert(pa_hashmap_size(c->namereg) == 0);
  97     pa_hashmap_free(c->namereg, NULL, NULL);
  98 }
  99
 100 const char *pa_namereg_register(pa_core *c, const char *name, pa_namereg_type_t type, void *data, int fail) {
 101     struct namereg_entry *e;
 102     char *n = NULL;
 103     int r;
 104
 105     assert(c);
 106     assert(name);
 107     assert(data);
 108
 109     if (!*name)
 110         return NULL;
 111
 112     if (!pa_namereg_is_valid_name(name)) {
 113
 114         if (fail)
 115             return NULL;
 116
 117         if (!(name = n = pa_namereg_cleanup_name(name)))
 118             return NULL;
 119     }
 120
 121     if (!c->namereg)
 122         c->namereg = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 123
 124     if ((e = pa_hashmap_get(c->namereg, name)) && fail) {
 125         pa_xfree(n);
 126         return NULL;
 127     }
 128
 129     if (e) {
 130         unsigned i;
 131         size_t l = strlen(name);
 132         char *k;
 133
 134         if (l+4 > PA_NAME_MAX) {
 135             pa_xfree(n);
 136             return NULL;
 137         }
 138
 139         k = pa_xnew(char, l+4);
 140
 141         for (i = 2; i <= 99; i++) {
 142             snprintf(k, l+4, "%s.%u", name, i);
 143
 144             if (!(e = pa_hashmap_get(c->namereg, k)))
 145                 break;
 146         }
 147
 148         if (e) {
 149             pa_xfree(n);
 150             pa_xfree(k);
 151             return NULL;
 152         }
 153
 154         pa_xfree(n);
 155         n = k;
 156     }
 157
 158     e = pa_xnew(struct namereg_entry, 1);
 159     e->type = type;
 160     e->name = n ? n : pa_xstrdup(name);
 161     e->data = data;
 162
 163     r = pa_hashmap_put(c->namereg, e->name, e);
 164     assert (r >= 0);
 165
 166     return e->name;
 167 }
 168
 169 void pa_namereg_unregister(pa_core *c, const char *name) {
 170     struct namereg_entry *e;
 171
 172     assert(c);
 173     assert(name);
 174
 175     e = pa_hashmap_remove(c->namereg, name);
 176     assert(e);
 177
 178     pa_xfree(e->name);
 179     pa_xfree(e);
 180 }
 181
 182 void* pa_namereg_get(pa_core *c, const char *name, pa_namereg_type_t type, int autoload) {
 183     struct namereg_entry *e;
 184     uint32_t idx;
 185     assert(c);
 186
 187     if (!name) {
 188
 189         if (type == PA_NAMEREG_SOURCE)
 190             name = pa_namereg_get_default_source_name(c);
 191         else if (type == PA_NAMEREG_SINK)
 192             name = pa_namereg_get_default_sink_name(c);
 193
 194     } else if (strcmp(name, "@DEFAULT_SINK@") == 0) {
 195         if (type == PA_NAMEREG_SINK)
 196                name = pa_namereg_get_default_sink_name(c);
 197
 198     } else if (strcmp(name, "@DEFAULT_SOURCE@") == 0) {
 199         if (type == PA_NAMEREG_SOURCE)
 200             name = pa_namereg_get_default_source_name(c);
 201
 202     } else if (strcmp(name, "@DEFAULT_MONITOR@") == 0) {
 203         if (type == PA_NAMEREG_SOURCE) {
 204             pa_sink *k;
 205
 206             if ((k = pa_namereg_get(c, NULL, PA_NAMEREG_SINK, autoload)))
 207                 return k->monitor_source;
 208         }
 209     } else if (*name == '@')
 210         name = NULL;
 211
 212     if (!name)
 213         return NULL;
 214
 215     if (c->namereg && (e = pa_hashmap_get(c->namereg, name)))
 216         if (e->type == type)
 217             return e->data;
 218
 219     if (pa_atou(name, &idx) < 0) {
 220
 221         if (autoload) {
 222             pa_autoload_request(c, name, type);
 223
 224             if (c->namereg && (e = pa_hashmap_get(c->namereg, name)))
 225                 if (e->type == type)
 226                     return e->data;
 227         }
 228
 229         return NULL;
 230     }
 231
 232     if (type == PA_NAMEREG_SINK)
 233         return pa_idxset_get_by_index(c->sinks, idx);
 234     else if (type == PA_NAMEREG_SOURCE)
 235         return pa_idxset_get_by_index(c->sources, idx);
 236     else if (type == PA_NAMEREG_SAMPLE && c->scache)
 237         return pa_idxset_get_by_index(c->scache, idx);
 238
 239     return NULL;
 240 }
 241
 242 int pa_namereg_set_default(pa_core*c, const char *name, pa_namereg_type_t type) {
 243     char **s;
 244
 245     assert(c);
 246     assert(type == PA_NAMEREG_SINK || type == PA_NAMEREG_SOURCE);
 247
 248     s = type == PA_NAMEREG_SINK ? &c->default_sink_name : &c->default_source_name;
 249
 250     if (!name && !*s)
 251         return 0;
 252
 253     if (name && *s && !strcmp(name, *s))
 254         return 0;
 255
 256     if (!pa_namereg_is_valid_name(name))
 257         return -1;
 258
 259     pa_xfree(*s);
 260     *s = pa_xstrdup(name);
 261     pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_SERVER|PA_SUBSCRIPTION_EVENT_CHANGE, PA_INVALID_INDEX);
 262
 263     return 0;
 264 }
 265
 266 const char *pa_namereg_get_default_sink_name(pa_core *c) {
 267     pa_sink *s;
 268
 269     assert(c);
 270
 271     if (c->default_sink_name)
 272         return c->default_sink_name;
 273
 274     if ((s = pa_idxset_first(c->sinks, NULL)))
 275         pa_namereg_set_default(c, s->name, PA_NAMEREG_SINK);
 276
 277     return c->default_sink_name;
 278 }
 279
 280 const char *pa_namereg_get_default_source_name(pa_core *c) {
 281     pa_source *s;
 282     uint32_t idx;
 283
 284     assert(c);
 285
 286     if (c->default_source_name)
 287         return c->default_source_name;
 288
 289     for (s = pa_idxset_first(c->sources, &idx); s; s = pa_idxset_next(c->sources, &idx))
 290         if (!s->monitor_of) {
 291             pa_namereg_set_default(c, s->name, PA_NAMEREG_SOURCE);
 292             break;
 293         }
 294
 295     if (!c->default_source_name)
 296         if ((s = pa_idxset_first(c->sources, NULL)))
 297             pa_namereg_set_default(c, s->name, PA_NAMEREG_SOURCE);
 298
 299     return c->default_source_name;
 300 }