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 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 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 static char* 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     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, int 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) &&
 112         !pa_namereg_is_valid_name(name) ) {
 113
 114         if (fail)
 115             return NULL;
 116
 117         if (!(name = n = 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             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     pa_xfree(e->name);
 177     pa_xfree(e);
 178 }
 179
 180 void* pa_namereg_get(pa_core *c, const char *name, pa_namereg_type_t type, pa_bool_t autoload) {
 181     struct namereg_entry *e;
 182     uint32_t idx;
 183     pa_assert(c);
 184
 185     if (!name) {
 186
 187         if (type == PA_NAMEREG_SOURCE)
 188             name = pa_namereg_get_default_source_name(c);
 189         else if (type == PA_NAMEREG_SINK)
 190             name = pa_namereg_get_default_sink_name(c);
 191
 192     } else if (strcmp(name, "@DEFAULT_SINK@") == 0) {
 193         if (type == PA_NAMEREG_SINK)
 194                name = pa_namereg_get_default_sink_name(c);
 195
 196     } else if (strcmp(name, "@DEFAULT_SOURCE@") == 0) {
 197         if (type == PA_NAMEREG_SOURCE)
 198             name = pa_namereg_get_default_source_name(c);
 199
 200     } else if (strcmp(name, "@DEFAULT_MONITOR@") == 0) {
 201         if (type == PA_NAMEREG_SOURCE) {
 202             pa_sink *k;
 203
 204             if ((k = pa_namereg_get(c, NULL, PA_NAMEREG_SINK, autoload)))
 205                 return k->monitor_source;
 206         }
 207     } else if (*name == '@')
 208         name = NULL;
 209
 210     if (!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
 219         if (autoload) {
 220             pa_autoload_request(c, name, type);
 221
 222             if (c->namereg && (e = pa_hashmap_get(c->namereg, name)))
 223                 if (e->type == type)
 224                     return e->data;
 225         }
 226
 227         return NULL;
 228     }
 229
 230     if (type == PA_NAMEREG_SINK)
 231         return pa_idxset_get_by_index(c->sinks, idx);
 232     else if (type == PA_NAMEREG_SOURCE)
 233         return pa_idxset_get_by_index(c->sources, idx);
 234     else if (type == PA_NAMEREG_SAMPLE && c->scache)
 235         return pa_idxset_get_by_index(c->scache, idx);
 236
 237     return NULL;
 238 }
 239
 240 int pa_namereg_set_default(pa_core*c, const char *name, pa_namereg_type_t type) {
 241     char **s;
 242
 243     pa_assert(c);
 244     pa_assert(type == PA_NAMEREG_SINK || type == PA_NAMEREG_SOURCE);
 245
 246     s = type == PA_NAMEREG_SINK ? &c->default_sink_name : &c->default_source_name;
 247
 248     if (!name && !*s)
 249         return 0;
 250
 251     if (name && *s && !strcmp(name, *s))
 252         return 0;
 253
 254     if (!pa_namereg_is_valid_name(name))
 255         return -1;
 256
 257     pa_xfree(*s);
 258     *s = pa_xstrdup(name);
 259     pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_SERVER|PA_SUBSCRIPTION_EVENT_CHANGE, PA_INVALID_INDEX);
 260
 261     return 0;
 262 }
 263
 264 const char *pa_namereg_get_default_sink_name(pa_core *c) {
 265     pa_sink *s;
 266
 267     pa_assert(c);
 268
 269     if (c->default_sink_name)
 270         return c->default_sink_name;
 271
 272     if ((s = pa_idxset_first(c->sinks, NULL)))
 273         pa_namereg_set_default(c, s->name, PA_NAMEREG_SINK);
 274
 275     return c->default_sink_name;
 276 }
 277
 278 const char *pa_namereg_get_default_source_name(pa_core *c) {
 279     pa_source *s;
 280     uint32_t idx;
 281
 282     pa_assert(c);
 283
 284     if (c->default_source_name)
 285         return c->default_source_name;
 286
 287     for (s = pa_idxset_first(c->sources, &idx); s; s = pa_idxset_next(c->sources, &idx))
 288         if (!s->monitor_of) {
 289             pa_namereg_set_default(c, s->name, PA_NAMEREG_SOURCE);
 290             break;
 291         }
 292
 293     if (!c->default_source_name)
 294         if ((s = pa_idxset_first(c->sources, NULL)))
 295             pa_namereg_set_default(c, s->name, PA_NAMEREG_SOURCE);
 296
 297     return c->default_source_name;
 298 }