src/output_command.c

   1 /*
   2  * Copyright (C) 2003-2010 The Music Player Daemon Project
   3  * http://www.musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 /*
  21  * Glue functions for controlling the audio outputs over the MPD
  22  * protocol.  These functions perform extra validation on all
  23  * parameters, because they might be from an untrusted source.
  24  *
  25  */
  26
  27 #include "config.h"
  28 #include "output_command.h"
  29 #include "output_all.h"
  30 #include "output_internal.h"
  31 #include "output_plugin.h"
  32 #include "mixer_control.h"
  33 #include "player_control.h"
  34 #include "idle.h"
  35
  36 extern unsigned audio_output_state_version;
  37
  38 bool
  39 audio_output_enable_index(unsigned idx)
  40 {
  41         struct audio_output *ao;
  42
  43         if (idx >= audio_output_count())
  44                 return false;
  45
  46         ao = audio_output_get(idx);
  47         if (ao->enabled)
  48                 return true;
  49
  50         ao->enabled = true;
  51         idle_add(IDLE_OUTPUT);
  52
  53         pc_update_audio();
  54
  55         ++audio_output_state_version;
  56
  57         return true;
  58 }
  59
  60 bool
  61 audio_output_disable_index(unsigned idx)
  62 {
  63         struct audio_output *ao;
  64         struct mixer *mixer;
  65
  66         if (idx >= audio_output_count())
  67                 return false;
  68
  69         ao = audio_output_get(idx);
  70         if (!ao->enabled)
  71                 return true;
  72
  73         ao->enabled = false;
  74         idle_add(IDLE_OUTPUT);
  75
  76         mixer = ao->mixer;
  77         if (mixer != NULL) {
  78                 mixer_close(mixer);
  79                 idle_add(IDLE_MIXER);
  80         }
  81
  82         pc_update_audio();
  83
  84         ++audio_output_state_version;
  85
  86         return true;
  87 }