code.delx.au - pulseaudio/blob - polyp/scache.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU 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   polypaudio 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 General Public License
  17   along with polypaudio; 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 <assert.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <stdio.h>
  30
  31 #include "scache.h"
  32 #include "sink-input.h"
  33 #include "mainloop.h"
  34 #include "sample-util.h"
  35 #include "play-memchunk.h"
  36 #include "xmalloc.h"
  37 #include "subscribe.h"
  38 #include "namereg.h"
  39
  40 #define UNLOAD_POLL_TIME 2
  41
  42 static void timeout_callback(struct pa_mainloop_api *m, struct pa_time_event*e, const struct timeval *tv, void *userdata) {
  43     struct pa_core *c = userdata;
  44     struct timeval ntv;
  45     assert(c && c->mainloop == m && c->scache_auto_unload_event == e);
  46
  47     pa_scache_unload_unused(c);
  48
  49     gettimeofday(&ntv, NULL);
  50     ntv.tv_sec += UNLOAD_POLL_TIME;
  51     m->time_restart(e, &ntv);
  52 }
  53
  54 static void free_entry(struct pa_scache_entry *e) {
  55     assert(e);
  56     pa_namereg_unregister(e->core, e->name);
  57     pa_subscription_post(e->core, PA_SUBSCRIPTION_EVENT_SAMPLE_CACHE|PA_SUBSCRIPTION_EVENT_REMOVE, e->index);
  58     pa_xfree(e->name);
  59     if (e->memchunk.memblock)
  60         pa_memblock_unref(e->memchunk.memblock);
  61     pa_xfree(e);
  62 }
  63
  64 int pa_scache_add_item(struct pa_core *c, const char *name, struct pa_sample_spec *ss, struct pa_memchunk *chunk, uint32_t *index, int auto_unload) {
  65     struct pa_scache_entry *e;
  66     int put;
  67     assert(c && name);
  68
  69     if ((e = pa_namereg_get(c, name, PA_NAMEREG_SAMPLE, 0))) {
  70         put = 0;
  71         if (e->memchunk.memblock)
  72             pa_memblock_unref(e->memchunk.memblock);
  73         assert(e->core == c);
  74     } else {
  75
  76         put = 1;
  77         e = pa_xmalloc(sizeof(struct pa_scache_entry));
  78
  79         if (!pa_namereg_register(c, name, PA_NAMEREG_SAMPLE, e, 1)) {
  80             pa_xfree(e);
  81             return -1;
  82         }
  83
  84         e->name = pa_xstrdup(name);
  85         e->core = c;
  86     }
  87
  88     e->volume = PA_VOLUME_NORM;
  89     e->auto_unload = auto_unload;
  90     e->last_used_time = 0;
  91
  92     if (ss)
  93         e->sample_spec = *ss;
  94     else
  95         memset(&e->sample_spec, 0, sizeof(struct pa_sample_spec));
  96
  97     if (chunk) {
  98         e->memchunk = *chunk;
  99         pa_memblock_ref(e->memchunk.memblock);
 100     } else {
 101         e->memchunk.memblock = NULL;
 102         e->memchunk.index = e->memchunk.length = 0;
 103     }
 104
 105     if (put) {
 106         if (!c->scache) {
 107             c->scache = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
 108             assert(c->scache);
 109         }
 110
 111         pa_idxset_put(c->scache, e, &e->index);
 112
 113         pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_SAMPLE_CACHE|PA_SUBSCRIPTION_EVENT_NEW, e->index);
 114     } else
 115         pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_SAMPLE_CACHE|PA_SUBSCRIPTION_EVENT_CHANGE, e->index);
 116
 117     if (index)
 118         *index = e->index;
 119
 120     if (!c->scache_auto_unload_event) {
 121         struct timeval ntv;
 122         gettimeofday(&ntv, NULL);
 123         ntv.tv_sec += UNLOAD_POLL_TIME;
 124         c->scache_auto_unload_event = c->mainloop->time_new(c->mainloop, &ntv, timeout_callback, c);
 125     }
 126
 127     return 0;
 128 }
 129
 130 int pa_scache_remove_item(struct pa_core *c, const char *name) {
 131     struct pa_scache_entry *e;
 132     assert(c && name);
 133
 134     if (!(e = pa_namereg_get(c, name, PA_NAMEREG_SAMPLE, 0)))
 135         return -1;
 136
 137     if (pa_idxset_remove_by_data(c->scache, e, NULL) != e)
 138         assert(0);
 139
 140     free_entry(e);
 141     return 0;
 142 }
 143
 144 static void free_cb(void *p, void *userdata) {
 145     struct pa_scache_entry *e = p;
 146     assert(e);
 147     free_entry(e);
 148 }
 149
 150 void pa_scache_free(struct pa_core *c) {
 151     assert(c);
 152
 153     if (c->scache) {
 154         pa_idxset_free(c->scache, free_cb, NULL);
 155         c->scache = NULL;
 156     }
 157
 158     if (c->scache_auto_unload_event)
 159         c->mainloop->time_free(c->scache_auto_unload_event);
 160 }
 161
 162 int pa_scache_play_item(struct pa_core *c, const char *name, struct pa_sink *sink, uint32_t volume) {
 163     struct pa_scache_entry *e;
 164     assert(c && name && sink);
 165
 166     if (!(e = pa_namereg_get(c, name, PA_NAMEREG_SAMPLE, 1)))
 167         return -1;
 168
 169     if (!e->memchunk.memblock)
 170         return -1;
 171
 172     if (pa_play_memchunk(sink, name, &e->sample_spec, &e->memchunk, pa_volume_multiply(volume, e->volume)) < 0)
 173         return -1;
 174
 175     if (e->auto_unload)
 176         time(&e->last_used_time);
 177
 178     return 0;
 179 }
 180
 181 const char * pa_scache_get_name_by_id(struct pa_core *c, uint32_t id) {
 182     struct pa_scache_entry *e;
 183     assert(c && id != PA_IDXSET_INVALID);
 184
 185     if (!c->scache || !(e = pa_idxset_get_by_index(c->scache, id)))
 186         return NULL;
 187
 188     return e->name;
 189 }
 190
 191 uint32_t pa_scache_get_id_by_name(struct pa_core *c, const char *name) {
 192     struct pa_scache_entry *e;
 193     assert(c && name);
 194
 195     if (!(e = pa_namereg_get(c, name, PA_NAMEREG_SAMPLE, 1)))
 196         return PA_IDXSET_INVALID;
 197
 198     return e->index;
 199 }
 200
 201 uint32_t pa_scache_total_size(struct pa_core *c) {
 202     struct pa_scache_entry *e;
 203     uint32_t index;
 204     uint32_t sum = 0;
 205
 206     if (!c->scache)
 207         return 0;
 208
 209     for (e = pa_idxset_first(c->scache, &index); e; e = pa_idxset_next(c->scache, &index))
 210         sum += e->memchunk.length;
 211
 212     return sum;
 213 }
 214
 215 static int unload_func(void *p, uint32_t index, int *del, void *userdata) {
 216     struct pa_scache_entry *e = p;
 217     time_t *now = userdata;
 218     assert(e);
 219
 220     if (!e->auto_unload)
 221         return 0;
 222
 223     if (e->last_used_time + e->core->scache_idle_time > *now)
 224         return 0;
 225
 226     free_entry(e);
 227     *del = 1;
 228     return 0;
 229 }
 230
 231 void pa_scache_unload_unused(struct pa_core *c) {
 232     time_t now;
 233     assert(c);
 234
 235     if (!c->scache)
 236         return;
 237
 238     time(&now);
 239
 240     pa_idxset_foreach(c->scache, unload_func, &now);
 241 }