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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdlib.h>
  29 #include <string.h>
  30 #include <string.h>
  31 #include <stdio.h>
  32
  33 #include <pulse/xmalloc.h>
  34
  35 #include <pulsecore/autoload.h>
  36 #include <pulsecore/source.h>
  37 #include <pulsecore/sink.h>
  38 #include <pulsecore/core-subscribe.h>
  39 #include <pulsecore/core-util.h>
  40 #include <pulsecore/macro.h>
  41
  42 #include "namereg.h"
  43
  44 struct namereg_entry {
  45     pa_namereg_type_t type;
  46     char *name;
  47     void *data;
  48 };
  49
  50 static int is_valid_char(char c) {
  51     return
  52         (c >= 'a' && c <= 'z') ||
  53         (c >= 'A' && c <= 'Z') ||
  54         (c >= '0' && c <= '9') ||
  55         c == '.' ||
  56         c == '_';
  57 }
  58
  59 static int is_valid_name(const char *name) {
  60     const char *c;
  61
  62     if (*name == 0)
  63         return 0;
  64
  65     for (c = name; *c && (c-name < PA_NAME_MAX); c++)
  66         if (!is_valid_char(*c))
  67             return 0;
  68
  69     if (*c)
  70         return 0;
  71
  72     return 1;
  73 }
  74
  75 static char* cleanup_name(const char *name) {
  76     const char *a;
  77     char *b, *n;
  78
  79     if (*name == 0)
  80         return NULL;
  81
  82     n = pa_xnew(char, strlen(name)+1);
  83
  84     for (a = name, b = n; *a && (a-name < PA_NAME_MAX); a++, b++)
  85         *b = is_valid_char(*a) ? *a : '_';
  86
  87     *b = 0;
  88
  89     return n;
  90 }
  91
  92 void pa_namereg_free(pa_core *c) {
  93     pa_assert(c);
  94
  95     if (!c->namereg)
  96         return;
  97
  98     pa_assert(pa_hashmap_size(c->namereg) == 0);
  99     pa_hashmap_free(c->namereg, NULL, NULL);
 100 }
 101
 102 const char *pa_namereg_register(pa_core *c, const char *name, pa_namereg_type_t type, void *data, int fail) {
 103     struct namereg_entry *e;
 104     char *n = NULL;
 105
 106     pa_assert(c);
 107     pa_assert(name);
 108     pa_assert(data);
 109
 110     if (!*name)
 111         return NULL;
 112
 113     if ((type == PA_NAMEREG_SINK || type == PA_NAMEREG_SOURCE) &&
 114         !is_valid_name(name) ) {
 115
 116         if (fail)
 117             return NULL;
 118
 119         if (!(name = n = cleanup_name(name)))
 120             return NULL;
 121     }
 122
 123     if (!c->namereg)
 124         c->namereg = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 125
 126     if ((e = pa_hashmap_get(c->namereg, name)) && fail) {
 127         pa_xfree(n);
 128         return NULL;
 129     }
 130
 131     if (e) {
 132         unsigned i;
 133         size_t l = strlen(name);
 134         char *k;
 135
 136         if (l+4 > PA_NAME_MAX) {
 137             pa_xfree(n);
 138             return NULL;
 139         }
 140
 141         k = pa_xnew(char, l+4);
 142
 143         for (i = 2; i <= 99; i++) {
 144             pa_snprintf(k, l+4, "%s.%u", name, i);
 145
 146             if (!(e = pa_hashmap_get(c->namereg, k)))
 147                 break;
 148         }
 149
 150         if (e) {
 151             pa_xfree(n);
 152             pa_xfree(k);
 153             return NULL;
 154         }
 155
 156         pa_xfree(n);
 157         n = k;
 158     }
 159
 160     e = pa_xnew(struct namereg_entry, 1);
 161     e->type = type;
 162     e->name = n ? n : pa_xstrdup(name);
 163     e->data = data;
 164
 165     pa_assert_se(pa_hashmap_put(c->namereg, e->name, e) >= 0);
 166
 167     return e->name;
 168 }
 169
 170 void pa_namereg_unregister(pa_core *c, const char *name) {
 171     struct namereg_entry *e;
 172
 173     pa_assert(c);
 174     pa_assert(name);
 175
 176     pa_assert_se(e = pa_hashmap_remove(c->namereg, name));
 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     pa_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     pa_assert(c);
 246     pa_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 (!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     pa_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     pa_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 }