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 #include "sound-file.h"
  40
  41 #define UNLOAD_POLL_TIME 2
  42
  43 static void timeout_callback(struct pa_mainloop_api *m, struct pa_time_event*e, const struct timeval *tv, void *userdata) {
  44     struct pa_core *c = userdata;
  45     struct timeval ntv;
  46     assert(c && c->mainloop == m && c->scache_auto_unload_event == e);
  47
  48     pa_scache_unload_unused(c);
  49
  50     gettimeofday(&ntv, NULL);
  51     ntv.tv_sec += UNLOAD_POLL_TIME;
  52     m->time_restart(e, &ntv);
  53 }
  54
  55 static void free_entry(struct pa_scache_entry *e) {
  56     assert(e);
  57     pa_namereg_unregister(e->core, e->name);
  58     pa_subscription_post(e->core, PA_SUBSCRIPTION_EVENT_SAMPLE_CACHE|PA_SUBSCRIPTION_EVENT_REMOVE, e->index);
  59     pa_xfree(e->name);
  60     pa_xfree(e->filename);
  61     if (e->memchunk.memblock)
  62         pa_memblock_unref(e->memchunk.memblock);
  63     pa_xfree(e);
  64 }
  65
  66 static struct pa_scache_entry* scache_add_item(struct pa_core *c, const char *name) {
  67     struct pa_scache_entry *e;
  68     assert(c && name);
  69
  70     if ((e = pa_namereg_get(c, name, PA_NAMEREG_SAMPLE, 0))) {
  71         if (e->memchunk.memblock)
  72             pa_memblock_unref(e->memchunk.memblock);
  73
  74         pa_xfree(e->filename);
  75
  76         assert(e->core == c);
  77
  78         pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_SAMPLE_CACHE|PA_SUBSCRIPTION_EVENT_CHANGE, e->index);
  79     } else {
  80         e = pa_xmalloc(sizeof(struct pa_scache_entry));
  81
  82         if (!pa_namereg_register(c, name, PA_NAMEREG_SAMPLE, e, 1)) {
  83             pa_xfree(e);
  84             return NULL;
  85         }
  86
  87         e->name = pa_xstrdup(name);
  88         e->core = c;
  89
  90         if (!c->scache) {
  91             c->scache = pa_idxset_new(pa_idxset_trivial_hash_func, pa_idxset_trivial_compare_func);
  92             assert(c->scache);
  93         }
  94
  95         pa_idxset_put(c->scache, e, &e->index);
  96
  97         pa_subscription_post(c, PA_SUBSCRIPTION_EVENT_SAMPLE_CACHE|PA_SUBSCRIPTION_EVENT_NEW, e->index);
  98     }
  99
 100     e->volume = PA_VOLUME_NORM;
 101     e->last_used_time = 0;
 102     e->memchunk.memblock = NULL;
 103     e->memchunk.index = e->memchunk.length = 0;
 104     e->filename = NULL;
 105     e->lazy = 0;
 106     e->last_used_time = 0;
 107
 108     memset(&e->sample_spec, 0, sizeof(struct pa_sample_spec));
 109
 110     return e;
 111 }
 112
 113 int pa_scache_add_item(struct pa_core *c, const char *name, struct pa_sample_spec *ss, struct pa_memchunk *chunk, uint32_t *index) {
 114     struct pa_scache_entry *e;
 115     assert(c && name);
 116
 117     if (!(e = scache_add_item(c, name)))
 118         return -1;
 119
 120     if (ss)
 121         e->sample_spec = *ss;
 122
 123     if (chunk) {
 124         e->memchunk = *chunk;
 125         pa_memblock_ref(e->memchunk.memblock);
 126     }
 127
 128     if (index)
 129         *index = e->index;
 130
 131     return 0;
 132 }
 133
 134 int pa_scache_add_file(struct pa_core *c, const char *name, const char *filename, uint32_t *index) {
 135     struct pa_sample_spec ss;
 136     struct pa_memchunk chunk;
 137     int r;
 138
 139     if (pa_sound_file_load(filename, &ss, &chunk, c->memblock_stat) < 0)
 140         return -1;
 141
 142     r = pa_scache_add_item(c, name, &ss, &chunk, index);
 143     pa_memblock_unref(chunk.memblock);
 144     return r;
 145 }
 146
 147 int pa_scache_add_file_lazy(struct pa_core *c, const char *name, const char *filename, uint32_t *index) {
 148     struct pa_scache_entry *e;
 149     assert(c && name);
 150
 151     if (!(e = scache_add_item(c, name)))
 152         return -1;
 153
 154     e->lazy = 1;
 155     e->filename = pa_xstrdup(filename);
 156
 157     if (!c->scache_auto_unload_event) {
 158         struct timeval ntv;
 159         gettimeofday(&ntv, NULL);
 160         ntv.tv_sec += UNLOAD_POLL_TIME;
 161         c->scache_auto_unload_event = c->mainloop->time_new(c->mainloop, &ntv, timeout_callback, c);
 162     }
 163
 164     return 0;
 165 }
 166
 167 int pa_scache_remove_item(struct pa_core *c, const char *name) {
 168     struct pa_scache_entry *e;
 169     assert(c && name);
 170
 171     if (!(e = pa_namereg_get(c, name, PA_NAMEREG_SAMPLE, 0)))
 172         return -1;
 173
 174     if (pa_idxset_remove_by_data(c->scache, e, NULL) != e)
 175         assert(0);
 176
 177     free_entry(e);
 178     return 0;
 179 }
 180
 181 static void free_cb(void *p, void *userdata) {
 182     struct pa_scache_entry *e = p;
 183     assert(e);
 184     free_entry(e);
 185 }
 186
 187 void pa_scache_free(struct pa_core *c) {
 188     assert(c);
 189
 190     if (c->scache) {
 191         pa_idxset_free(c->scache, free_cb, NULL);
 192         c->scache = NULL;
 193     }
 194
 195     if (c->scache_auto_unload_event)
 196         c->mainloop->time_free(c->scache_auto_unload_event);
 197 }
 198
 199 int pa_scache_play_item(struct pa_core *c, const char *name, struct pa_sink *sink, uint32_t volume) {
 200     struct pa_scache_entry *e;
 201     assert(c && name && sink);
 202
 203     if (!(e = pa_namereg_get(c, name, PA_NAMEREG_SAMPLE, 1)))
 204         return -1;
 205
 206     if (e->lazy && !e->memchunk.memblock)
 207         if (pa_sound_file_load(e->filename, &e->sample_spec, &e->memchunk, c->memblock_stat) < 0)
 208             return -1;
 209
 210     if (!e->memchunk.memblock)
 211         return -1;
 212
 213     if (pa_play_memchunk(sink, name, &e->sample_spec, &e->memchunk, pa_volume_multiply(volume, e->volume)) < 0)
 214         return -1;
 215
 216     if (e->lazy)
 217         time(&e->last_used_time);
 218
 219     return 0;
 220 }
 221
 222 const char * pa_scache_get_name_by_id(struct pa_core *c, uint32_t id) {
 223     struct pa_scache_entry *e;
 224     assert(c && id != PA_IDXSET_INVALID);
 225
 226     if (!c->scache || !(e = pa_idxset_get_by_index(c->scache, id)))
 227         return NULL;
 228
 229     return e->name;
 230 }
 231
 232 uint32_t pa_scache_get_id_by_name(struct pa_core *c, const char *name) {
 233     struct pa_scache_entry *e;
 234     assert(c && name);
 235
 236     if (!(e = pa_namereg_get(c, name, PA_NAMEREG_SAMPLE, 1)))
 237         return PA_IDXSET_INVALID;
 238
 239     return e->index;
 240 }
 241
 242 uint32_t pa_scache_total_size(struct pa_core *c) {
 243     struct pa_scache_entry *e;
 244     uint32_t index, sum = 0;
 245     assert(c);
 246
 247     if (!c->scache || !pa_idxset_ncontents(c->scache))
 248         return 0;
 249
 250     for (e = pa_idxset_first(c->scache, &index); e; e = pa_idxset_next(c->scache, &index))
 251         if (e->memchunk.memblock)
 252             sum += e->memchunk.length;
 253
 254     return sum;
 255 }
 256
 257 void pa_scache_unload_unused(struct pa_core *c) {
 258     struct pa_scache_entry *e;
 259     time_t now;
 260     uint32_t index;
 261     assert(c);
 262
 263     if (!c->scache || !pa_idxset_ncontents(c->scache))
 264         return;
 265
 266     time(&now);
 267
 268     for (e = pa_idxset_first(c->scache, &index); e; e = pa_idxset_next(c->scache, &index)) {
 269
 270         if (!e->lazy || !e->memchunk.memblock)
 271             continue;
 272
 273         if (e->last_used_time + c->scache_idle_time > now)
 274             continue;
 275
 276         pa_memblock_unref(e->memchunk.memblock);
 277         e->memchunk.memblock = NULL;
 278         e->memchunk.index = e->memchunk.length = 0;
 279     }
 280 }