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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   8
   9   PulseAudio is free software; you can redistribute it and/or modify
  10   it under the terms of the GNU Lesser General Public License as published
  11   by the Free Software Foundation; either version 2 of the License,
  12   or (at your option) any later version.
  13
  14   PulseAudio is distributed in the hope that it will be useful, but
  15   WITHOUT ANY WARRANTY; without even the implied warranty of
  16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17   General Public License for more details.
  18
  19   You should have received a copy of the GNU Lesser General Public License
  20   along with PulseAudio; if not, write to the Free Software
  21   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  22   USA.
  23 ***/
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #include <stdlib.h>
  30 #include <stdio.h>
  31 #include <signal.h>
  32
  33 #include <pulse/timeval.h>
  34 #include <pulse/xmalloc.h>
  35
  36 #include <pulsecore/module.h>
  37 #include <pulsecore/sink.h>
  38 #include <pulsecore/source.h>
  39 #include <pulsecore/namereg.h>
  40 #include <pulsecore/core-util.h>
  41 #include <pulsecore/core-scache.h>
  42 #include <pulsecore/autoload.h>
  43 #include <pulsecore/core-subscribe.h>
  44 #include <pulsecore/props.h>
  45 #include <pulsecore/random.h>
  46 #include <pulsecore/log.h>
  47 #include <pulsecore/macro.h>
  48
  49 #include "core.h"
  50
  51 static PA_DEFINE_CHECK_TYPE(pa_core, pa_msgobject);
  52
  53 static int core_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
  54     pa_core *c = PA_CORE(o);
  55
  56     pa_core_assert_ref(c);
  57
  58     switch (code) {
  59
  60         case PA_CORE_MESSAGE_UNLOAD_MODULE:
  61             pa_module_unload(c, userdata);
  62             return 0;
  63
  64         default:
  65             return -1;
  66     }
  67 }
  68
  69 static void core_free(pa_object *o);
  70
  71 pa_core* pa_core_new(pa_mainloop_api *m, int shared) {
  72     pa_core* c;
  73     pa_mempool *pool;
  74     int j;
  75
  76     pa_assert(m);
  77
  78     if (shared) {
  79         if (!(pool = pa_mempool_new(shared))) {
  80             pa_log_warn("failed to allocate shared memory pool. Falling back to a normal memory pool.");
  81             shared = 0;
  82         }
  83     }
  84
  85     if (!shared) {
  86         if (!(pool = pa_mempool_new(shared))) {
  87             pa_log("pa_mempool_new() failed.");
  88             return NULL;
  89         }
  90     }
  91
  92     c = pa_msgobject_new(pa_core);
  93     c->parent.parent.free = core_free;
  94     c->parent.process_msg = core_process_msg;
  95
  96     c->mainloop = m;
  97     c->clients = pa_idxset_new(NULL, NULL);
  98     c->sinks = pa_idxset_new(NULL, NULL);
  99     c->sources = pa_idxset_new(NULL, NULL);
 100     c->source_outputs = pa_idxset_new(NULL, NULL);
 101     c->sink_inputs = pa_idxset_new(NULL, NULL);
 102
 103     c->default_source_name = c->default_sink_name = NULL;
 104
 105     c->modules = NULL;
 106     c->namereg = NULL;
 107     c->scache = NULL;
 108     c->autoload_idxset = NULL;
 109     c->autoload_hashmap = NULL;
 110     c->running_as_daemon = FALSE;
 111
 112     c->default_sample_spec.format = PA_SAMPLE_S16NE;
 113     c->default_sample_spec.rate = 44100;
 114     c->default_sample_spec.channels = 2;
 115     c->default_n_fragments = 4;
 116     c->default_fragment_size_msec = 25;
 117
 118     c->module_auto_unload_event = NULL;
 119     c->module_defer_unload_event = NULL;
 120     c->scache_auto_unload_event = NULL;
 121
 122     c->subscription_defer_event = NULL;
 123     PA_LLIST_HEAD_INIT(pa_subscription, c->subscriptions);
 124     PA_LLIST_HEAD_INIT(pa_subscription_event, c->subscription_event_queue);
 125     c->subscription_event_last = NULL;
 126
 127     c->mempool = pool;
 128
 129     c->quit_event = NULL;
 130
 131     c->exit_idle_time = -1;
 132     c->module_idle_time = 20;
 133     c->scache_idle_time = 20;
 134
 135     c->resample_method = PA_RESAMPLER_SPEEX_FLOAT_BASE + 3;
 136
 137     c->is_system_instance = FALSE;
 138     c->disallow_module_loading = FALSE;
 139     c->realtime_scheduling = FALSE;
 140     c->realtime_priority = 5;
 141
 142     for (j = 0; j < PA_CORE_HOOK_MAX; j++)
 143         pa_hook_init(&c->hooks[j], c);
 144
 145     pa_property_init(c);
 146
 147     pa_random(&c->cookie, sizeof(c->cookie));
 148
 149 #ifdef SIGPIPE
 150     pa_check_signal_is_blocked(SIGPIPE);
 151 #endif
 152
 153     return c;
 154 }
 155
 156 static void core_free(pa_object *o) {
 157     pa_core *c = PA_CORE(o);
 158     int j;
 159     pa_assert(c);
 160
 161     pa_module_unload_all(c);
 162     pa_assert(!c->modules);
 163
 164     pa_assert(pa_idxset_isempty(c->clients));
 165     pa_idxset_free(c->clients, NULL, NULL);
 166
 167     pa_assert(pa_idxset_isempty(c->sinks));
 168     pa_idxset_free(c->sinks, NULL, NULL);
 169
 170     pa_assert(pa_idxset_isempty(c->sources));
 171     pa_idxset_free(c->sources, NULL, NULL);
 172
 173     pa_assert(pa_idxset_isempty(c->source_outputs));
 174     pa_idxset_free(c->source_outputs, NULL, NULL);
 175
 176     pa_assert(pa_idxset_isempty(c->sink_inputs));
 177     pa_idxset_free(c->sink_inputs, NULL, NULL);
 178
 179     pa_scache_free(c);
 180     pa_namereg_free(c);
 181     pa_autoload_free(c);
 182     pa_subscription_free_all(c);
 183
 184     if (c->quit_event)
 185         c->mainloop->time_free(c->quit_event);
 186
 187     pa_xfree(c->default_source_name);
 188     pa_xfree(c->default_sink_name);
 189
 190     pa_mempool_free(c->mempool);
 191
 192     pa_property_cleanup(c);
 193
 194     for (j = 0; j < PA_CORE_HOOK_MAX; j++)
 195         pa_hook_free(&c->hooks[j]);
 196
 197     pa_xfree(c);
 198 }
 199
 200 static void quit_callback(pa_mainloop_api*m, pa_time_event *e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) {
 201     pa_core *c = userdata;
 202     pa_assert(c->quit_event == e);
 203
 204     m->quit(m, 0);
 205 }
 206
 207 void pa_core_check_quit(pa_core *c) {
 208     pa_assert(c);
 209
 210     if (!c->quit_event && c->exit_idle_time >= 0 && pa_idxset_size(c->clients) == 0) {
 211         struct timeval tv;
 212         pa_gettimeofday(&tv);
 213         tv.tv_sec+= c->exit_idle_time;
 214         c->quit_event = c->mainloop->time_new(c->mainloop, &tv, quit_callback, c);
 215     } else if (c->quit_event && pa_idxset_size(c->clients) > 0) {
 216         c->mainloop->time_free(c->quit_event);
 217         c->quit_event = NULL;
 218     }
 219 }