code.delx.au - pulseaudio/blob - polyp/source.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 <stdio.h>
  27 #include <assert.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include "source.h"
  32 #include "source-output.h"
  33 #include "namereg.h"
  34 #include "xmalloc.h"
  35 #include "subscribe.h"
  36 #include "log.h"
  37
  38 struct pa_source* pa_source_new(struct pa_core *core, const char *name, int fail, const struct pa_sample_spec *spec) {
  39     struct pa_source *s;
  40     char st[256];
  41     int r;
  42     assert(core && spec && name && *name);
  43
  44     s = pa_xmalloc(sizeof(struct pa_source));
  45
  46     if (!(name = pa_namereg_register(core, name, PA_NAMEREG_SOURCE, s, fail))) {
  47         pa_xfree(s);
  48         return NULL;
  49     }
  50
  51     s->ref = 1;
  52     s->state = PA_SOURCE_RUNNING;
  53
  54     s->name = pa_xstrdup(name);
  55     s->description = NULL;
  56
  57     s->owner = NULL;
  58     s->core = core;
  59     s->sample_spec = *spec;
  60     s->outputs = pa_idxset_new(NULL, NULL);
  61     s->monitor_of = NULL;
  62
  63     s->get_latency = NULL;
  64     s->notify = NULL;
  65     s->userdata = NULL;
  66
  67     r = pa_idxset_put(core->sources, s, &s->index);
  68     assert(s->index != PA_IDXSET_INVALID && r >= 0);
  69
  70     pa_sample_spec_snprint(st, sizeof(st), spec);
  71     pa_log(__FILE__": created %u \"%s\" with sample spec \"%s\"\n", s->index, s->name, st);
  72
  73     pa_subscription_post(core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
  74
  75     return s;
  76 }
  77
  78 void pa_source_disconnect(struct pa_source *s) {
  79     struct pa_source_output *o, *j = NULL;
  80     assert(s && s->state == PA_SOURCE_RUNNING);
  81
  82     pa_namereg_unregister(s->core, s->name);
  83
  84     while ((o = pa_idxset_first(s->outputs, NULL))) {
  85         assert(o != j);
  86         pa_source_output_kill(o);
  87         j = o;
  88     }
  89
  90     pa_idxset_remove_by_data(s->core->sources, s, NULL);
  91     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
  92
  93     s->notify = NULL;
  94
  95     s->state = PA_SOURCE_DISCONNECTED;
  96 }
  97
  98 static void source_free(struct pa_source *s) {
  99     assert(s && !s->ref);
 100
 101     if (s->state != PA_SOURCE_DISCONNECTED)
 102         pa_source_disconnect(s);
 103
 104     pa_log(__FILE__": freed %u \"%s\"\n", s->index, s->name);
 105
 106     pa_idxset_free(s->outputs, NULL, NULL);
 107
 108     pa_xfree(s->name);
 109     pa_xfree(s->description);
 110     pa_xfree(s);
 111 }
 112
 113 void pa_source_unref(struct pa_source *s) {
 114     assert(s && s->ref >= 1);
 115
 116     if (!(--s->ref))
 117         source_free(s);
 118 }
 119
 120 struct pa_source* pa_source_ref(struct pa_source *s) {
 121     assert(s && s->ref >= 1);
 122     s->ref++;
 123     return s;
 124 }
 125
 126 void pa_source_notify(struct pa_source*s) {
 127     assert(s && s->ref >= 1);
 128
 129     if (s->notify)
 130         s->notify(s);
 131 }
 132
 133 static int do_post(void *p, uint32_t index, int *del, void*userdata) {
 134     const struct pa_memchunk *chunk = userdata;
 135     struct pa_source_output *o = p;
 136     assert(o && o->push && del && chunk);
 137
 138     pa_source_output_push(o, chunk);
 139     return 0;
 140 }
 141
 142 void pa_source_post(struct pa_source*s, const struct pa_memchunk *chunk) {
 143     assert(s && s->ref >= 1 && chunk);
 144
 145     pa_source_ref(s);
 146     pa_idxset_foreach(s->outputs, do_post, (void*) chunk);
 147     pa_source_unref(s);
 148 }
 149
 150 void pa_source_set_owner(struct pa_source *s, struct pa_module *m) {
 151     assert(s);
 152     s->owner = m;
 153 }
 154
 155 pa_usec_t pa_source_get_latency(struct pa_source *s) {
 156     assert(s && s->ref >= 1);
 157
 158     if (!s->get_latency)
 159         return 0;
 160
 161     return s->get_latency(s);
 162 }
 163