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

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5   Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
   6
   7   PulseAudio is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU Lesser General Public License as published
   9   by the Free Software Foundation; either version 2 of the License,
  10   or (at your option) any later version.
  11
  12   PulseAudio is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with PulseAudio; if not, write to the Free Software
  19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  20   USA.
  21 ***/
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdlib.h>
  28 #include <stdio.h>
  29 #include <signal.h>
  30
  31 #include <pulse/timeval.h>
  32 #include <pulse/xmalloc.h>
  33
  34 #include <pulsecore/module.h>
  35 #include <pulsecore/sink.h>
  36 #include <pulsecore/source.h>
  37 #include <pulsecore/namereg.h>
  38 #include <pulsecore/core-util.h>
  39 #include <pulsecore/core-scache.h>
  40 #include <pulsecore/core-subscribe.h>
  41 #include <pulsecore/shared.h>
  42 #include <pulsecore/random.h>
  43 #include <pulsecore/log.h>
  44 #include <pulsecore/macro.h>
  45
  46 #include "core.h"
  47
  48 static PA_DEFINE_CHECK_TYPE(pa_core, pa_msgobject);
  49
  50 static int core_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
  51     pa_core *c = PA_CORE(o);
  52
  53     pa_core_assert_ref(c);
  54
  55     switch (code) {
  56
  57         case PA_CORE_MESSAGE_UNLOAD_MODULE:
  58             pa_module_unload(c, userdata, TRUE);
  59             return 0;
  60
  61         default:
  62             return -1;
  63     }
  64 }
  65
  66 static void core_free(pa_object *o);
  67
  68 pa_core* pa_core_new(pa_mainloop_api *m, pa_bool_t shared, size_t shm_size) {
  69     pa_core* c;
  70     pa_mempool *pool;
  71     int j;
  72
  73     pa_assert(m);
  74
  75     if (shared) {
  76         if (!(pool = pa_mempool_new(shared, shm_size))) {
  77             pa_log_warn("failed to allocate shared memory pool. Falling back to a normal memory pool.");
  78             shared = FALSE;
  79         }
  80     }
  81
  82     if (!shared) {
  83         if (!(pool = pa_mempool_new(shared, shm_size))) {
  84             pa_log("pa_mempool_new() failed.");
  85             return NULL;
  86         }
  87     }
  88
  89     c = pa_msgobject_new(pa_core);
  90     c->parent.parent.free = core_free;
  91     c->parent.process_msg = core_process_msg;
  92
  93     c->state = PA_CORE_STARTUP;
  94     c->mainloop = m;
  95     c->clients = pa_idxset_new(NULL, NULL);
  96     c->sinks = pa_idxset_new(NULL, NULL);
  97     c->sources = pa_idxset_new(NULL, NULL);
  98     c->source_outputs = pa_idxset_new(NULL, NULL);
  99     c->sink_inputs = pa_idxset_new(NULL, NULL);
 100     c->cards = pa_idxset_new(NULL, NULL);
 101
 102     c->default_source_name = c->default_sink_name = NULL;
 103
 104     c->modules = NULL;
 105     c->namereg = NULL;
 106     c->scache = NULL;
 107     c->running_as_daemon = FALSE;
 108
 109     c->default_sample_spec.format = PA_SAMPLE_S16NE;
 110     c->default_sample_spec.rate = 44100;
 111     c->default_sample_spec.channels = 2;
 112     c->default_n_fragments = 4;
 113     c->default_fragment_size_msec = 25;
 114
 115     c->module_defer_unload_event = NULL;
 116     c->scache_auto_unload_event = NULL;
 117
 118     c->subscription_defer_event = NULL;
 119     PA_LLIST_HEAD_INIT(pa_subscription, c->subscriptions);
 120     PA_LLIST_HEAD_INIT(pa_subscription_event, c->subscription_event_queue);
 121     c->subscription_event_last = NULL;
 122
 123     c->mempool = pool;
 124     pa_silence_cache_init(&c->silence_cache);
 125
 126     c->exit_event = NULL;
 127
 128     c->exit_idle_time = -1;
 129     c->scache_idle_time = 20;
 130
 131     c->resample_method = PA_RESAMPLER_SPEEX_FLOAT_BASE + 3;
 132
 133     c->disallow_module_loading = FALSE;
 134     c->disallow_exit = FALSE;
 135     c->realtime_scheduling = FALSE;
 136     c->realtime_priority = 5;
 137     c->disable_remixing = FALSE;
 138     c->disable_lfe_remixing = FALSE;
 139
 140     for (j = 0; j < PA_CORE_HOOK_MAX; j++)
 141         pa_hook_init(&c->hooks[j], c);
 142
 143     pa_shared_init(c);
 144
 145     pa_random(&c->cookie, sizeof(c->cookie));
 146
 147 #ifdef SIGPIPE
 148     pa_check_signal_is_blocked(SIGPIPE);
 149 #endif
 150
 151     pa_core_check_idle(c);
 152
 153     c->state = PA_CORE_RUNNING;
 154
 155     return c;
 156 }
 157
 158 static void core_free(pa_object *o) {
 159     pa_core *c = PA_CORE(o);
 160     int j;
 161     pa_assert(c);
 162
 163     c->state = PA_CORE_SHUTDOWN;
 164
 165     pa_module_unload_all(c);
 166     pa_assert(!c->modules);
 167
 168     pa_assert(pa_idxset_isempty(c->clients));
 169     pa_idxset_free(c->clients, NULL, NULL);
 170
 171     pa_assert(pa_idxset_isempty(c->cards));
 172     pa_idxset_free(c->cards, NULL, NULL);
 173
 174     pa_assert(pa_idxset_isempty(c->sinks));
 175     pa_idxset_free(c->sinks, NULL, NULL);
 176
 177     pa_assert(pa_idxset_isempty(c->sources));
 178     pa_idxset_free(c->sources, NULL, NULL);
 179
 180     pa_assert(pa_idxset_isempty(c->source_outputs));
 181     pa_idxset_free(c->source_outputs, NULL, NULL);
 182
 183     pa_assert(pa_idxset_isempty(c->sink_inputs));
 184     pa_idxset_free(c->sink_inputs, NULL, NULL);
 185
 186     pa_scache_free(c);
 187     pa_namereg_free(c);
 188     pa_subscription_free_all(c);
 189
 190     if (c->exit_event)
 191         c->mainloop->time_free(c->exit_event);
 192
 193     pa_xfree(c->default_source_name);
 194     pa_xfree(c->default_sink_name);
 195
 196     pa_silence_cache_done(&c->silence_cache);
 197     pa_mempool_free(c->mempool);
 198
 199     pa_shared_cleanup(c);
 200
 201     for (j = 0; j < PA_CORE_HOOK_MAX; j++)
 202         pa_hook_done(&c->hooks[j]);
 203
 204     pa_xfree(c);
 205 }
 206
 207 static void exit_callback(pa_mainloop_api*m, pa_time_event *e, const struct timeval *tv, void *userdata) {
 208     pa_core *c = userdata;
 209     pa_assert(c->exit_event == e);
 210
 211     pa_log_info("We are idle, quitting...");
 212     pa_core_exit(c, TRUE, 0);
 213 }
 214
 215 void pa_core_check_idle(pa_core *c) {
 216     pa_assert(c);
 217
 218     if (!c->exit_event &&
 219         c->exit_idle_time >= 0 &&
 220         pa_idxset_size(c->clients) == 0) {
 221
 222         struct timeval tv;
 223         pa_gettimeofday(&tv);
 224         tv.tv_sec+= c->exit_idle_time;
 225
 226         c->exit_event = c->mainloop->time_new(c->mainloop, &tv, exit_callback, c);
 227
 228     } else if (c->exit_event && pa_idxset_size(c->clients) > 0) {
 229         c->mainloop->time_free(c->exit_event);
 230         c->exit_event = NULL;
 231     }
 232 }
 233
 234 int pa_core_exit(pa_core *c, pa_bool_t force, int retval) {
 235     pa_assert(c);
 236
 237     if (c->disallow_exit && !force)
 238         return -1;
 239
 240     c->mainloop->quit(c->mainloop, retval);
 241     return 0;
 242 }