code.delx.au - pulseaudio/blob - src/modules/module-default-device-restore.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2006-2008 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <errno.h>
  29 #include <stdio.h>
  30
  31 #include <pulse/timeval.h>
  32
  33 #include <pulsecore/core-util.h>
  34 #include <pulsecore/module.h>
  35 #include <pulsecore/log.h>
  36 #include <pulsecore/namereg.h>
  37 #include <pulsecore/core-error.h>
  38
  39 #include "module-default-device-restore-symdef.h"
  40
  41 PA_MODULE_AUTHOR("Lennart Poettering");
  42 PA_MODULE_DESCRIPTION("Automatically restore the default sink and source");
  43 PA_MODULE_VERSION(PACKAGE_VERSION);
  44 PA_MODULE_LOAD_ONCE(TRUE);
  45
  46 #define DEFAULT_SINK_FILE "default-sink"
  47 #define DEFAULT_SOURCE_FILE "default-source"
  48 #define DEFAULT_SAVE_INTERVAL 5
  49
  50 struct userdata {
  51     pa_core *core;
  52     pa_subscription *subscription;
  53     pa_time_event *time_event;
  54     char *sink_filename, *source_filename;
  55     pa_bool_t modified;
  56 };
  57
  58 static void load(struct userdata *u) {
  59     FILE *f;
  60
  61     /* We never overwrite manually configured settings */
  62
  63     if (u->core->default_sink_name)
  64         pa_log_info("Manually configured default sink, not overwriting.");
  65     else if ((f = fopen(u->sink_filename, "r"))) {
  66         char ln[256] = "";
  67
  68         fgets(ln, sizeof(ln)-1, f);
  69         pa_strip_nl(ln);
  70         fclose(f);
  71
  72         if (!ln[0])
  73             pa_log_info("No previous default sink setting, ignoring.");
  74         else if (pa_namereg_get(u->core, ln, PA_NAMEREG_SINK, TRUE)) {
  75             pa_namereg_set_default(u->core, ln, PA_NAMEREG_SINK);
  76             pa_log_info("Restored default sink '%s'.", ln);
  77         } else
  78             pa_log_info("Saved default sink '%s' not existant, not restoring default sink setting.", ln);
  79
  80     } else if (errno != ENOENT)
  81         pa_log("Failed to load default sink: %s", pa_cstrerror(errno));
  82
  83     if (u->core->default_source_name)
  84         pa_log_info("Manually configured default source, not overwriting.");
  85     else if ((f = fopen(u->source_filename, "r"))) {
  86         char ln[256] = "";
  87
  88         fgets(ln, sizeof(ln)-1, f);
  89         pa_strip_nl(ln);
  90         fclose(f);
  91
  92         if (!ln[0])
  93             pa_log_info("No previous default source setting, ignoring.");
  94         else if (pa_namereg_get(u->core, ln, PA_NAMEREG_SOURCE, TRUE)) {
  95             pa_namereg_set_default(u->core, ln, PA_NAMEREG_SOURCE);
  96             pa_log_info("Restored default source '%s'.", ln);
  97         } else
  98             pa_log_info("Saved default source '%s' not existant, not restoring default source setting.", ln);
  99
 100     } else if (errno != ENOENT)
 101             pa_log("Failed to load default sink: %s", pa_cstrerror(errno));
 102 }
 103
 104 static void save(struct userdata *u) {
 105     FILE *f;
 106
 107     if (!u->modified)
 108         return;
 109
 110     if (u->sink_filename) {
 111         if ((f = fopen(u->sink_filename, "w"))) {
 112             const char *n = pa_namereg_get_default_sink_name(u->core);
 113             fprintf(f, "%s\n", pa_strempty(n));
 114             fclose(f);
 115         } else
 116             pa_log("Failed to save default sink: %s", pa_cstrerror(errno));
 117     }
 118
 119     if (u->source_filename) {
 120         if ((f = fopen(u->source_filename, "w"))) {
 121             const char *n = pa_namereg_get_default_source_name(u->core);
 122             fprintf(f, "%s\n", pa_strempty(n));
 123             fclose(f);
 124         } else
 125             pa_log("Failed to save default source: %s", pa_cstrerror(errno));
 126     }
 127
 128     u->modified = FALSE;
 129 }
 130
 131 static void time_cb(pa_mainloop_api *a, pa_time_event *e, const struct timeval *tv, void *userdata) {
 132     struct userdata *u = userdata;
 133
 134     pa_assert(u);
 135     save(u);
 136
 137     if (u->time_event) {
 138         u->core->mainloop->time_free(u->time_event);
 139         u->time_event = NULL;
 140     }
 141 }
 142
 143 static void subscribe_cb(pa_core *c, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
 144     struct userdata *u = userdata;
 145
 146     pa_assert(u);
 147
 148     u->modified = TRUE;
 149
 150     if (!u->time_event) {
 151         struct timeval tv;
 152         pa_gettimeofday(&tv);
 153         pa_timeval_add(&tv, DEFAULT_SAVE_INTERVAL*PA_USEC_PER_SEC);
 154         u->time_event = u->core->mainloop->time_new(u->core->mainloop, &tv, time_cb, u);
 155     }
 156 }
 157
 158 int pa__init(pa_module *m) {
 159     struct userdata *u;
 160
 161     pa_assert(u);
 162
 163     u = pa_xnew0(struct userdata, 1);
 164     u->core = m->core;
 165
 166     if (!(u->sink_filename = pa_runtime_path(DEFAULT_SINK_FILE)))
 167         goto fail;
 168
 169     if (!(u->source_filename = pa_runtime_path(DEFAULT_SOURCE_FILE)))
 170         goto fail;
 171
 172     load(u);
 173
 174     u->subscription = pa_subscription_new(u->core, PA_SUBSCRIPTION_MASK_SERVER, subscribe_cb, u);
 175
 176     return 0;
 177
 178 fail:
 179     pa__done(m);
 180
 181     return -1;
 182 }
 183
 184 void pa__done(pa_module*m) {
 185     struct userdata *u;
 186
 187     pa_assert(m);
 188
 189     if (!(u = m->userdata))
 190         return;
 191
 192     save(u);
 193
 194     if (u->subscription)
 195         pa_subscription_free(u->subscription);
 196
 197     if (u->time_event)
 198         m->core->mainloop->time_free(u->time_event);
 199
 200     pa_xfree(u->sink_filename);
 201     pa_xfree(u->source_filename);
 202     pa_xfree(u);
 203 }