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 2.1 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/rtclock.h>
  32 #include <pulse/timeval.h>
  33 #include <pulse/xmalloc.h>
  34
  35 #include <pulsecore/module.h>
  36 #include <pulsecore/core-rtclock.h>
  37 #include <pulsecore/core-util.h>
  38 #include <pulsecore/core-scache.h>
  39 #include <pulsecore/core-subscribe.h>
  40 #include <pulsecore/random.h>
  41 #include <pulsecore/log.h>
  42 #include <pulsecore/macro.h>
  43
  44 #include "core.h"
  45
  46 PA_DEFINE_PUBLIC_CLASS(pa_core, pa_msgobject);
  47
  48 static int core_process_msg(pa_msgobject *o, int code, void *userdata, int64_t offset, pa_memchunk *chunk) {
  49     pa_core *c = PA_CORE(o);
  50
  51     pa_core_assert_ref(c);
  52
  53     switch (code) {
  54
  55         case PA_CORE_MESSAGE_UNLOAD_MODULE:
  56             pa_module_unload(c, userdata, TRUE);
  57             return 0;
  58
  59         default:
  60             return -1;
  61     }
  62 }
  63
  64 static void core_free(pa_object *o);
  65
  66 pa_core* pa_core_new(pa_mainloop_api *m, pa_bool_t shared, size_t shm_size) {
  67     pa_core* c;
  68     pa_mempool *pool;
  69     int j;
  70
  71     pa_assert(m);
  72
  73     if (shared) {
  74         if (!(pool = pa_mempool_new(shared, shm_size))) {
  75             pa_log_warn("failed to allocate shared memory pool. Falling back to a normal memory pool.");
  76             shared = FALSE;
  77         }
  78     }
  79
  80     if (!shared) {
  81         if (!(pool = pa_mempool_new(shared, shm_size))) {
  82             pa_log("pa_mempool_new() failed.");
  83             return NULL;
  84         }
  85     }
  86
  87     c = pa_msgobject_new(pa_core);
  88     c->parent.parent.free = core_free;
  89     c->parent.process_msg = core_process_msg;
  90
  91     c->state = PA_CORE_STARTUP;
  92     c->mainloop = m;
  93
  94     c->clients = pa_idxset_new(NULL, NULL);
  95     c->cards = pa_idxset_new(NULL, NULL);
  96     c->sinks = pa_idxset_new(NULL, NULL);
  97     c->sources = pa_idxset_new(NULL, NULL);
  98     c->sink_inputs = pa_idxset_new(NULL, NULL);
  99     c->source_outputs = pa_idxset_new(NULL, NULL);
 100     c->modules = pa_idxset_new(NULL, NULL);
 101     c->scache = pa_idxset_new(NULL, NULL);
 102
 103     c->namereg = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 104     c->shared = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
 105
 106     c->default_source = NULL;
 107     c->default_sink = NULL;
 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     pa_channel_map_init_extend(&c->default_channel_map, c->default_sample_spec.channels, PA_CHANNEL_MAP_DEFAULT);
 113     c->default_n_fragments = 4;
 114     c->default_fragment_size_msec = 25;
 115
 116     c->sync_volume_safety_margin_usec = 8000;
 117     c->sync_volume_extra_delay_usec = 0;
 118
 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     pa_silence_cache_init(&c->silence_cache);
 129
 130     c->exit_event = NULL;
 131
 132     c->exit_idle_time = -1;
 133     c->scache_idle_time = 20;
 134
 135     c->flat_volumes = TRUE;
 136     c->disallow_module_loading = FALSE;
 137     c->disallow_exit = FALSE;
 138     c->running_as_daemon = FALSE;
 139     c->realtime_scheduling = FALSE;
 140     c->realtime_priority = 5;
 141     c->disable_remixing = FALSE;
 142     c->disable_lfe_remixing = FALSE;
 143     c->sync_volume = TRUE;
 144     c->resample_method = PA_RESAMPLER_SPEEX_FLOAT_BASE + 3;
 145
 146     for (j = 0; j < PA_CORE_HOOK_MAX; j++)
 147         pa_hook_init(&c->hooks[j], c);
 148
 149     pa_random(&c->cookie, sizeof(c->cookie));
 150
 151 #ifdef SIGPIPE
 152     pa_check_signal_is_blocked(SIGPIPE);
 153 #endif
 154
 155     pa_core_check_idle(c);
 156
 157     c->state = PA_CORE_RUNNING;
 158
 159     return c;
 160 }
 161
 162 static void core_free(pa_object *o) {
 163     pa_core *c = PA_CORE(o);
 164     int j;
 165     pa_assert(c);
 166
 167     c->state = PA_CORE_SHUTDOWN;
 168
 169     pa_module_unload_all(c);
 170     pa_scache_free_all(c);
 171
 172     pa_assert(pa_idxset_isempty(c->scache));
 173     pa_idxset_free(c->scache, NULL, NULL);
 174
 175     pa_assert(pa_idxset_isempty(c->modules));
 176     pa_idxset_free(c->modules, NULL, NULL);
 177
 178     pa_assert(pa_idxset_isempty(c->clients));
 179     pa_idxset_free(c->clients, NULL, NULL);
 180
 181     pa_assert(pa_idxset_isempty(c->cards));
 182     pa_idxset_free(c->cards, NULL, NULL);
 183
 184     pa_assert(pa_idxset_isempty(c->sinks));
 185     pa_idxset_free(c->sinks, NULL, NULL);
 186
 187     pa_assert(pa_idxset_isempty(c->sources));
 188     pa_idxset_free(c->sources, NULL, NULL);
 189
 190     pa_assert(pa_idxset_isempty(c->source_outputs));
 191     pa_idxset_free(c->source_outputs, NULL, NULL);
 192
 193     pa_assert(pa_idxset_isempty(c->sink_inputs));
 194     pa_idxset_free(c->sink_inputs, NULL, NULL);
 195
 196     pa_assert(pa_hashmap_isempty(c->namereg));
 197     pa_hashmap_free(c->namereg, NULL, NULL);
 198
 199     pa_assert(pa_hashmap_isempty(c->shared));
 200     pa_hashmap_free(c->shared, NULL, NULL);
 201
 202     pa_subscription_free_all(c);
 203
 204     if (c->exit_event)
 205         c->mainloop->time_free(c->exit_event);
 206
 207     pa_assert(!c->default_source);
 208     pa_assert(!c->default_sink);
 209
 210     pa_silence_cache_done(&c->silence_cache);
 211     pa_mempool_free(c->mempool);
 212
 213     for (j = 0; j < PA_CORE_HOOK_MAX; j++)
 214         pa_hook_done(&c->hooks[j]);
 215
 216     pa_xfree(c);
 217 }
 218
 219 static void exit_callback(pa_mainloop_api *m, pa_time_event *e, const struct timeval *t, void *userdata) {
 220     pa_core *c = userdata;
 221     pa_assert(c->exit_event == e);
 222
 223     pa_log_info("We are idle, quitting...");
 224     pa_core_exit(c, TRUE, 0);
 225 }
 226
 227 void pa_core_check_idle(pa_core *c) {
 228     pa_assert(c);
 229
 230     if (!c->exit_event &&
 231         c->exit_idle_time >= 0 &&
 232         pa_idxset_size(c->clients) == 0) {
 233
 234         c->exit_event = pa_core_rttime_new(c, pa_rtclock_now() + c->exit_idle_time * PA_USEC_PER_SEC, exit_callback, c);
 235
 236     } else if (c->exit_event && pa_idxset_size(c->clients) > 0) {
 237         c->mainloop->time_free(c->exit_event);
 238         c->exit_event = NULL;
 239     }
 240 }
 241
 242 int pa_core_exit(pa_core *c, pa_bool_t force, int retval) {
 243     pa_assert(c);
 244
 245     if (c->disallow_exit && !force)
 246         return -1;
 247
 248     c->mainloop->quit(c->mainloop, retval);
 249     return 0;
 250 }
 251
 252 void pa_core_maybe_vacuum(pa_core *c) {
 253     pa_assert(c);
 254
 255     if (!pa_idxset_isempty(c->sink_inputs) ||
 256         !pa_idxset_isempty(c->source_outputs))
 257         return;
 258
 259     pa_log_debug("Hmm, no streams around, trying to vacuum.");
 260     pa_mempool_vacuum(c->mempool);
 261 }
 262
 263 pa_time_event* pa_core_rttime_new(pa_core *c, pa_usec_t usec, pa_time_event_cb_t cb, void *userdata) {
 264     struct timeval tv;
 265
 266     pa_assert(c);
 267     pa_assert(c->mainloop);
 268
 269     return c->mainloop->time_new(c->mainloop, pa_timeval_rtstore(&tv, usec, TRUE), cb, userdata);
 270 }
 271
 272 void pa_core_rttime_restart(pa_core *c, pa_time_event *e, pa_usec_t usec) {
 273     struct timeval tv;
 274
 275     pa_assert(c);
 276     pa_assert(c->mainloop);
 277
 278     c->mainloop->time_restart(e, pa_timeval_rtstore(&tv, usec, TRUE));
 279 }