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