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 <assert.h>
  31 #include <stdio.h>
  32 #include <signal.h>
  33
  34 #include <pulse/timeval.h>
  35 #include <pulse/xmalloc.h>
  36
  37 #include <pulsecore/module.h>
  38 #include <pulsecore/sink.h>
  39 #include <pulsecore/source.h>
  40 #include <pulsecore/namereg.h>
  41 #include <pulsecore/core-util.h>
  42 #include <pulsecore/core-scache.h>
  43 #include <pulsecore/autoload.h>
  44 #include <pulsecore/core-subscribe.h>
  45 #include <pulsecore/props.h>
  46 #include <pulsecore/random.h>
  47 #include <pulsecore/log.h>
  48 #include <pulsecore/macro.h>
  49
  50 #include "core.h"
  51
  52 static int core_process_msg(pa_msgobject *o, int code, void *userdata, pa_memchunk *chunk) {
  53     pa_core *c = PA_CORE(o);
  54
  55     pa_core_assert_ref(c);
  56
  57     switch (code) {
  58
  59         case PA_CORE_MESSAGE_UNLOAD_MODULE:
  60             pa_module_unload(c, userdata);
  61             return 0;
  62
  63         default:
  64             return -1;
  65     }
  66 }
  67
  68 static void asyncmsgq_cb(pa_mainloop_api*api, pa_io_event* e, int fd, pa_io_event_flags_t events, void *userdata) {
  69     pa_core *c = userdata;
  70
  71     pa_assert(pa_asyncmsgq_get_fd(c->asyncmsgq) == fd);
  72     pa_assert(events == PA_IO_EVENT_INPUT);
  73
  74     pa_asyncmsgq_after_poll(c->asyncmsgq);
  75
  76     for (;;) {
  77         pa_msgobject *object;
  78         int code;
  79         void *data;
  80         pa_memchunk chunk;
  81
  82         /* Check whether there is a message for us to process */
  83         while (pa_asyncmsgq_get(c->asyncmsgq, &object, &code, &data, &chunk, 0) == 0) {
  84             pa_asyncmsgq_dispatch(object, code, data, &chunk);
  85             pa_asyncmsgq_done(c->asyncmsgq, 0);
  86         }
  87
  88         if (pa_asyncmsgq_before_poll(c->asyncmsgq) == 0)
  89             break;
  90     }
  91 }
  92
  93 static void core_free(pa_object *o);
  94
  95 pa_core* pa_core_new(pa_mainloop_api *m, int shared) {
  96     pa_core* c;
  97     pa_mempool *pool;
  98
  99     pa_assert(m);
 100
 101     if (shared) {
 102         if (!(pool = pa_mempool_new(shared))) {
 103             pa_log_warn("failed to allocate shared memory pool. Falling back to a normal memory pool.");
 104             shared = 0;
 105         }
 106     }
 107
 108     if (!shared) {
 109         if (!(pool = pa_mempool_new(shared))) {
 110             pa_log("pa_mempool_new() failed.");
 111             return NULL;
 112         }
 113     }
 114
 115     c = pa_msgobject_new(pa_core);
 116     c->parent.parent.free = core_free;
 117     c->parent.process_msg = core_process_msg;
 118
 119     c->mainloop = m;
 120     c->clients = pa_idxset_new(NULL, NULL);
 121     c->sinks = pa_idxset_new(NULL, NULL);
 122     c->sources = pa_idxset_new(NULL, NULL);
 123     c->source_outputs = pa_idxset_new(NULL, NULL);
 124     c->sink_inputs = pa_idxset_new(NULL, NULL);
 125
 126     c->default_source_name = c->default_sink_name = NULL;
 127
 128     c->modules = NULL;
 129     c->namereg = NULL;
 130     c->scache = NULL;
 131     c->autoload_idxset = NULL;
 132     c->autoload_hashmap = NULL;
 133     c->running_as_daemon = 0;
 134
 135     c->default_sample_spec.format = PA_SAMPLE_S16NE;
 136     c->default_sample_spec.rate = 44100;
 137     c->default_sample_spec.channels = 2;
 138
 139     c->module_auto_unload_event = NULL;
 140     c->module_defer_unload_event = NULL;
 141     c->scache_auto_unload_event = NULL;
 142
 143     c->subscription_defer_event = NULL;
 144     PA_LLIST_HEAD_INIT(pa_subscription, c->subscriptions);
 145     PA_LLIST_HEAD_INIT(pa_subscription_event, c->subscription_event_queue);
 146     c->subscription_event_last = NULL;
 147
 148     c->mempool = pool;
 149
 150     c->disallow_module_loading = 0;
 151
 152     c->quit_event = NULL;
 153
 154     c->exit_idle_time = -1;
 155     c->module_idle_time = 20;
 156     c->scache_idle_time = 20;
 157
 158     c->resample_method = PA_RESAMPLER_SRC_SINC_FASTEST;
 159
 160     c->is_system_instance = 0;
 161
 162     pa_hook_init(&c->hook_sink_input_new, c);
 163     pa_hook_init(&c->hook_sink_disconnect, c);
 164     pa_hook_init(&c->hook_source_output_new, c);
 165     pa_hook_init(&c->hook_source_disconnect, c);
 166
 167     pa_property_init(c);
 168
 169     pa_random(&c->cookie, sizeof(c->cookie));
 170
 171 #ifdef SIGPIPE
 172     pa_check_signal_is_blocked(SIGPIPE);
 173 #endif
 174
 175     pa_assert_se(c->asyncmsgq = pa_asyncmsgq_new(0));
 176     pa_assert_se(pa_asyncmsgq_before_poll(c->asyncmsgq) == 0);
 177     pa_assert_se(c->asyncmsgq_event = c->mainloop->io_new(c->mainloop, pa_asyncmsgq_get_fd(c->asyncmsgq), PA_IO_EVENT_INPUT, asyncmsgq_cb, c));
 178
 179     return c;
 180 }
 181
 182 static void core_free(pa_object *o) {
 183     pa_core *c = PA_CORE(o);
 184     pa_core_assert_ref(c);
 185
 186     pa_module_unload_all(c);
 187     assert(!c->modules);
 188
 189     assert(pa_idxset_isempty(c->clients));
 190     pa_idxset_free(c->clients, NULL, NULL);
 191
 192     assert(pa_idxset_isempty(c->sinks));
 193     pa_idxset_free(c->sinks, NULL, NULL);
 194
 195     assert(pa_idxset_isempty(c->sources));
 196     pa_idxset_free(c->sources, NULL, NULL);
 197
 198     assert(pa_idxset_isempty(c->source_outputs));
 199     pa_idxset_free(c->source_outputs, NULL, NULL);
 200
 201     assert(pa_idxset_isempty(c->sink_inputs));
 202     pa_idxset_free(c->sink_inputs, NULL, NULL);
 203
 204     pa_scache_free(c);
 205     pa_namereg_free(c);
 206     pa_autoload_free(c);
 207     pa_subscription_free_all(c);
 208
 209     if (c->quit_event)
 210         c->mainloop->time_free(c->quit_event);
 211
 212     pa_xfree(c->default_source_name);
 213     pa_xfree(c->default_sink_name);
 214
 215     pa_mempool_free(c->mempool);
 216
 217     pa_property_cleanup(c);
 218
 219     c->mainloop->io_free(c->asyncmsgq_event);
 220     pa_asyncmsgq_after_poll(c->asyncmsgq);
 221     pa_asyncmsgq_free(c->asyncmsgq);
 222
 223     pa_hook_free(&c->hook_sink_input_new);
 224     pa_hook_free(&c->hook_sink_disconnect);
 225     pa_hook_free(&c->hook_source_output_new);
 226     pa_hook_free(&c->hook_source_disconnect);
 227
 228     pa_xfree(c);
 229 }
 230
 231 static void quit_callback(pa_mainloop_api*m, pa_time_event *e, PA_GCC_UNUSED const struct timeval *tv, void *userdata) {
 232     pa_core *c = userdata;
 233     assert(c->quit_event = e);
 234
 235     m->quit(m, 0);
 236 }
 237
 238 void pa_core_check_quit(pa_core *c) {
 239     assert(c);
 240
 241     if (!c->quit_event && c->exit_idle_time >= 0 && pa_idxset_size(c->clients) == 0) {
 242         struct timeval tv;
 243         pa_gettimeofday(&tv);
 244         tv.tv_sec+= c->exit_idle_time;
 245         c->quit_event = c->mainloop->time_new(c->mainloop, &tv, quit_callback, c);
 246     } else if (c->quit_event && pa_idxset_size(c->clients) > 0) {
 247         c->mainloop->time_free(c->quit_event);
 248         c->quit_event = NULL;
 249     }
 250 }
 251