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 <polypcore/source-output.h>
  32 #include <polypcore/namereg.h>
  33 #include <polypcore/xmalloc.h>
  34 #include <polypcore/core-subscribe.h>
  35 #include <polypcore/log.h>
  36
  37 #include "source.h"
  38
  39 pa_source* pa_source_new(
  40     pa_core *core,
  41     const char *driver,
  42     const char *name,
  43     int fail,
  44     const pa_sample_spec *spec,
  45     const pa_channel_map *map) {
  46
  47     pa_source *s;
  48     char st[256];
  49     int r;
  50
  51     assert(core);
  52     assert(name);
  53     assert(*name);
  54     assert(spec);
  55
  56     s = pa_xnew(pa_source, 1);
  57
  58     if (!(name = pa_namereg_register(core, name, PA_NAMEREG_SOURCE, s, fail))) {
  59         pa_xfree(s);
  60         return NULL;
  61     }
  62
  63     s->ref = 1;
  64     s->core = core;
  65     s->state = PA_SOURCE_RUNNING;
  66     s->name = pa_xstrdup(name);
  67     s->description = NULL;
  68     s->driver = pa_xstrdup(driver);
  69     s->owner = NULL;
  70
  71     s->sample_spec = *spec;
  72     if (map)
  73         s->channel_map = *map;
  74     else
  75         pa_channel_map_init_auto(&s->channel_map, spec->channels);
  76
  77     s->outputs = pa_idxset_new(NULL, NULL);
  78     s->monitor_of = NULL;
  79
  80     s->get_latency = NULL;
  81     s->notify = NULL;
  82     s->userdata = NULL;
  83
  84     r = pa_idxset_put(core->sources, s, &s->index);
  85     assert(s->index != PA_IDXSET_INVALID && r >= 0);
  86
  87     pa_sample_spec_snprint(st, sizeof(st), spec);
  88     pa_log_info(__FILE__": created %u \"%s\" with sample spec \"%s\"\n", s->index, s->name, st);
  89
  90     pa_subscription_post(core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_NEW, s->index);
  91
  92     return s;
  93 }
  94
  95 void pa_source_disconnect(pa_source *s) {
  96     pa_source_output *o, *j = NULL;
  97
  98     assert(s);
  99     assert(s->state == PA_SOURCE_RUNNING);
 100
 101     pa_namereg_unregister(s->core, s->name);
 102
 103     while ((o = pa_idxset_first(s->outputs, NULL))) {
 104         assert(o != j);
 105         pa_source_output_kill(o);
 106         j = o;
 107     }
 108
 109     pa_idxset_remove_by_data(s->core->sources, s, NULL);
 110
 111     s->get_latency = NULL;
 112     s->notify = NULL;
 113
 114     s->state = PA_SOURCE_DISCONNECTED;
 115     pa_subscription_post(s->core, PA_SUBSCRIPTION_EVENT_SOURCE | PA_SUBSCRIPTION_EVENT_REMOVE, s->index);
 116 }
 117
 118 static void source_free(pa_source *s) {
 119     assert(s);
 120     assert(!s->ref);
 121
 122     if (s->state != PA_SOURCE_DISCONNECTED)
 123         pa_source_disconnect(s);
 124
 125     pa_log_info(__FILE__": freed %u \"%s\"\n", s->index, s->name);
 126
 127     pa_idxset_free(s->outputs, NULL, NULL);
 128
 129     pa_xfree(s->name);
 130     pa_xfree(s->description);
 131     pa_xfree(s->driver);
 132     pa_xfree(s);
 133 }
 134
 135 void pa_source_unref(pa_source *s) {
 136     assert(s);
 137     assert(s->ref >= 1);
 138
 139     if (!(--s->ref))
 140         source_free(s);
 141 }
 142
 143 pa_source* pa_source_ref(pa_source *s) {
 144     assert(s);
 145     assert(s->ref >= 1);
 146
 147     s->ref++;
 148     return s;
 149 }
 150
 151 void pa_source_notify(pa_source*s) {
 152     assert(s);
 153     assert(s->ref >= 1);
 154
 155     if (s->notify)
 156         s->notify(s);
 157 }
 158
 159 static int do_post(void *p, PA_GCC_UNUSED uint32_t idx, int *del, void*userdata) {
 160     pa_source_output *o = p;
 161     const pa_memchunk *chunk = userdata;
 162
 163     assert(o);
 164     assert(chunk);
 165
 166     pa_source_output_push(o, chunk);
 167     return 0;
 168 }
 169
 170 void pa_source_post(pa_source*s, const pa_memchunk *chunk) {
 171     assert(s);
 172     assert(s->ref >= 1);
 173     assert(chunk);
 174
 175     pa_source_ref(s);
 176     pa_idxset_foreach(s->outputs, do_post, (void*) chunk);
 177     pa_source_unref(s);
 178 }
 179
 180 void pa_source_set_owner(pa_source *s, pa_module *m) {
 181     assert(s);
 182     assert(s->ref >= 1);
 183
 184     s->owner = m;
 185 }
 186
 187 pa_usec_t pa_source_get_latency(pa_source *s) {
 188     assert(s);
 189     assert(s->ref >= 1);
 190
 191     if (!s->get_latency)
 192         return 0;
 193
 194     return s->get_latency(s);
 195 }
 196