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/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 void pa_namereg_free(pa_core *c) {
  91     pa_assert(c);
  92
  93     if (!c->namereg)
  94         return;
  95
  96     pa_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, pa_bool_t fail) {
 101     struct namereg_entry *e;
 102     char *n = NULL;
 103
 104     pa_assert(c);
 105     pa_assert(name);
 106     pa_assert(data);
 107
 108     if (!*name)
 109         return NULL;
 110
 111     if ((type == PA_NAMEREG_SINK || type == PA_NAMEREG_SOURCE || type == PA_NAMEREG_CARD) &&
 112         !pa_namereg_is_valid_name(name)) {
 113
 114         if (fail)
 115             return NULL;
 116
 117         if (!(name = n = pa_namereg_make_valid_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_xmalloc(l+4);
 140
 141         for (i = 2; i <= 99; i++) {
 142             pa_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     pa_assert_se(pa_hashmap_put(c->namereg, e->name, e) >= 0);
 164
 165     return e->name;
 166 }
 167
 168 void pa_namereg_unregister(pa_core *c, const char *name) {
 169     struct namereg_entry *e;
 170
 171     pa_assert(c);
 172     pa_assert(name);
 173
 174     pa_assert_se(e = pa_hashmap_remove(c->namereg, name));
 175
 176     if (c->default_sink == e->data)
 177         pa_namereg_set_default_sink(c, NULL);
 178     else if (c->default_source == e->data)
 179         pa_namereg_set_default_source(c, NULL);
 180
 181     pa_xfree(e->name);
 182     pa_xfree(e);
 183 }
 184
 185 void* pa_namereg_get(pa_core *c, const char *name, pa_namereg_type_t type) {
 186     struct namereg_entry *e;
 187     uint32_t idx;
 188     pa_assert(c);
 189
 190     if (type == PA_NAMEREG_SOURCE && (!name || pa_streq(name, "@DEFAULT_SOURCE@"))) {
 191         pa_source *s;
 192
 193         if ((s = pa_namereg_get_default_source(c)))
 194             return s;
 195
 196     } else if (type == PA_NAMEREG_SINK && (!name || pa_streq(name, "@DEFAULT_SINK@"))) {
 197         pa_sink *s;
 198
 199         if ((s = pa_namereg_get_default_sink(c)))
 200             return s;
 201
 202     } else if (type == PA_NAMEREG_SOURCE && name && pa_streq(name, "@DEFAULT_MONITOR@")) {
 203         pa_sink *s;
 204
 205         if ((s = pa_namereg_get(c, NULL, PA_NAMEREG_SINK)))
 206             return s->monitor_source;
 207
 208     }
 209
 210     if (*name == '@' || !name || !pa_namereg_is_valid_name(name))
 211         return NULL;
 212
 213     if (c->namereg && (e = pa_hashmap_get(c->namereg, name)))
 214         if (e->type == type)
 215             return e->data;
 216
 217     if (pa_atou(name, &idx) < 0)
 218         return NULL;
 219
 220     if (type == PA_NAMEREG_SINK)
 221         return pa_idxset_get_by_index(c->sinks, idx);
 222     else if (type == PA_NAMEREG_SOURCE)
 223         return pa_idxset_get_by_index(c->sources, idx);
 224     else if (type == PA_NAMEREG_SAMPLE && c->scache)
 225         return pa_idxset_get_by_index(c->scache, idx);
 226     else if (type == PA_NAMEREG_CARD)
 227         return pa_idxset_get_by_index(c->cards, idx);
 228
 229     return NULL;
 230 }
 231
 232 pa_sink* pa_namereg_set_default_sink(pa_core*c, pa_sink *s) {
 233     pa_assert(c);
 234
 235     if (c->default_sink != s) {
 236         c->default_sink = s;
 237         pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_SERVER|PA_SUBSCRIPTION_EVENT_CHANGE, PA_INVALID_INDEX);
 238     }
 239
 240     return s;
 241 }
 242
 243 pa_source* pa_namereg_set_default_source(pa_core*c, pa_source *s) {
 244     pa_assert(c);
 245
 246     if (c->default_source != s) {
 247         c->default_source = s;
 248         pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_SERVER|PA_SUBSCRIPTION_EVENT_CHANGE, PA_INVALID_INDEX);
 249     }
 250
 251     return s;
 252 }
 253
 254 pa_sink *pa_namereg_get_default_sink(pa_core *c) {
 255     pa_sink *s;
 256
 257     pa_assert(c);
 258
 259     if (c->default_sink)
 260         return c->default_sink;
 261
 262     if ((s = pa_idxset_first(c->sinks, NULL)))
 263         return pa_namereg_set_default_sink(c, s);
 264
 265     return NULL;
 266 }
 267
 268 pa_source *pa_namereg_get_default_source(pa_core *c) {
 269     pa_source *s;
 270     uint32_t idx;
 271
 272     pa_assert(c);
 273
 274     if (c->default_source)
 275         return c->default_source;
 276
 277     for (s = PA_SOURCE(pa_idxset_first(c->sources, &idx)); s; s = PA_SOURCE(pa_idxset_next(c->sources, &idx)))
 278         if (!s->monitor_of)
 279             return pa_namereg_set_default_source(c, s);
 280
 281     if ((s = pa_idxset_first(c->sources, NULL)))
 282         return pa_namereg_set_default_source(c, s);
 283
 284     return NULL;
 285 }