code.delx.au - pulseaudio/blob - src/polypcore/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 Lesser 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 Lesser 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 pa_source* pa_source_new(
  39     pa_core *core,
  40     const char *driver,
  41     const char *name,
  42     int fail,
  43     const pa_sample_spec *spec,
  44     const pa_channel_map *map) {
  45
  46     pa_source *s;
  47     char st[256];
  48     int r;
  49
  50     assert(core);
  51     assert(name);
  52     assert(*name);
  53     assert(spec);
  54
  55     s = pa_xnew(pa_source, 1);
  56
  57     if (!(name = pa_namereg_register(core, name, PA_NAMEREG_SOURCE, s, fail))) {
  58         pa_xfree(s);
  59         return NULL;
  60     }
  61
  62     s->ref = 1;
  63     s->core = core;
  64     s->state = PA_SOURCE_RUNNING;
  65     s->name = pa_xstrdup(name);
  66     s->description = NULL;
  67     s->driver = pa_xstrdup(driver);
  68     s->owner = NULL;
  69
  70     s->sample_spec = *spec;
  71     if (map)
  72         s->channel_map = *map;
  73     else
  74         pa_channel_map_init_auto(&s->channel_map, spec->channels);
  75
  76     s->outputs = pa_idxset_new(NULL, NULL);
  77     s->monitor_of = NULL;
  78
  79     s->get_latency = NULL;
  80     s->notify = NULL;
  81     s->userdata = NULL;
  82
  83     r = pa_idxset_put(core->sources, s, &s->index);
  84     assert(s->index != PA_IDXSET_INVALID && r >= 0);
  85
  86     pa_sample_spec_snprint(st, sizeof(st), spec);
  87     pa_log_info(__FILE__": created %u \"%s\" with sample spec \"%s\"\n", s->index, s->name, st);
  88
  89     pa_subscription_post(core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
  90
  91     return s;
  92 }
  93
  94 void pa_source_disconnect(pa_source *s) {
  95     pa_source_output *o, *j = NULL;
  96
  97     assert(s);
  98     assert(s->state == PA_SOURCE_RUNNING);
  99
 100     pa_namereg_unregister(s->core, s->name);
 101
 102     while ((o = pa_idxset_first(s->outputs, NULL))) {
 103         assert(o != j);
 104         pa_source_output_kill(o);
 105         j = o;
 106     }
 107
 108     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 109
 110     s->get_latency = NULL;
 111     s->notify = NULL;
 112
 113     s->state = PA_SOURCE_DISCONNECTED;
 114     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 115 }
 116
 117 static void source_free(pa_source *s) {
 118     assert(s);
 119     assert(!s->ref);
 120
 121     if (s->state != PA_SOURCE_DISCONNECTED)
 122         pa_source_disconnect(s);
 123
 124     pa_log_info(__FILE__": freed %u \"%s\"\n", s->index, s->name);
 125
 126     pa_idxset_free(s->outputs, NULL, NULL);
 127
 128     pa_xfree(s->name);
 129     pa_xfree(s->description);
 130     pa_xfree(s->driver);
 131     pa_xfree(s);
 132 }
 133
 134 void pa_source_unref(pa_source *s) {
 135     assert(s);
 136     assert(s->ref >= 1);
 137
 138     if (!(--s->ref))
 139         source_free(s);
 140 }
 141
 142 pa_source* pa_source_ref(pa_source *s) {
 143     assert(s);
 144     assert(s->ref >= 1);
 145
 146     s->ref++;
 147     return s;
 148 }
 149
 150 void pa_source_notify(pa_source*s) {
 151     assert(s);
 152     assert(s->ref >= 1);
 153
 154     if (s->notify)
 155         s->notify(s);
 156 }
 157
 158 static int do_post(void *p, PA_GCC_UNUSED uint32_t idx, int *del, void*userdata) {
 159     pa_source_output *o = p;
 160     const pa_memchunk *chunk = userdata;
 161
 162     assert(o);
 163     assert(chunk);
 164
 165     pa_source_output_push(o, chunk);
 166     return 0;
 167 }
 168
 169 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
 170     assert(s);
 171     assert(s->ref >= 1);
 172     assert(chunk);
 173
 174     pa_source_ref(s);
 175     pa_idxset_foreach(s->outputs, do_post, (void*) chunk);
 176     pa_source_unref(s);
 177 }
 178
 179 void pa_source_set_owner(pa_source *s, pa_module *m) {
 180     assert(s);
 181     assert(s->ref >= 1);
 182
 183     s->owner = m;
 184 }
 185
 186 pa_usec_t pa_source_get_latency(pa_source *s) {
 187     assert(s);
 188     assert(s->ref >= 1);
 189
 190     if (!s->get_latency)
 191         return 0;
 192
 193     return s->get_latency(s);
 194 }
 195