test/read_mixer.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 #include "config.h"
  21 #include "mixer_control.h"
  22 #include "mixer_list.h"
  23 #include "filter_registry.h"
  24 #include "pcm_volume.h"
  25 #include "event_pipe.h"
  26
  27 #include <glib.h>
  28
  29 #include <assert.h>
  30 #include <string.h>
  31 #include <unistd.h>
  32
  33 #ifdef HAVE_PULSE
  34 #include "output/pulse_output_plugin.h"
  35
  36 void
  37 pulse_output_set_mixer(G_GNUC_UNUSED struct pulse_output *po,
  38                        G_GNUC_UNUSED struct pulse_mixer *pm)
  39 {
  40 }
  41
  42 void
  43 pulse_output_clear_mixer(G_GNUC_UNUSED struct pulse_output *po,
  44                          G_GNUC_UNUSED struct pulse_mixer *pm)
  45 {
  46 }
  47
  48 bool
  49 pulse_output_set_volume(G_GNUC_UNUSED struct pulse_output *po,
  50                         G_GNUC_UNUSED const struct pa_cvolume *volume,
  51                         G_GNUC_UNUSED GError **error_r)
  52 {
  53         return false;
  54 }
  55
  56 #endif
  57
  58 void
  59 event_pipe_emit(G_GNUC_UNUSED enum pipe_event event)
  60 {
  61 }
  62
  63 const struct filter_plugin *
  64 filter_plugin_by_name(G_GNUC_UNUSED const char *name)
  65 {
  66         assert(false);
  67         return NULL;
  68 }
  69
  70 bool
  71 pcm_volume(G_GNUC_UNUSED void *buffer, G_GNUC_UNUSED int length,
  72            G_GNUC_UNUSED const struct audio_format *format,
  73            G_GNUC_UNUSED int volume)
  74 {
  75         assert(false);
  76         return false;
  77 }
  78
  79 int main(int argc, G_GNUC_UNUSED char **argv)
  80 {
  81         GError *error = NULL;
  82         struct mixer *mixer;
  83         bool success;
  84         int volume;
  85
  86         if (argc != 2) {
  87                 g_printerr("Usage: read_mixer PLUGIN\n");
  88                 return 1;
  89         }
  90
  91         g_thread_init(NULL);
  92
  93         mixer = mixer_new(&alsa_mixer_plugin, NULL, NULL, &error);
  94         if (mixer == NULL) {
  95                 g_printerr("mixer_new() failed: %s\n", error->message);
  96                 g_error_free(error);
  97                 return 2;
  98         }
  99
 100         success = mixer_open(mixer, &error);
 101         if (!success) {
 102                 mixer_free(mixer);
 103                 g_printerr("failed to open the mixer: %s\n", error->message);
 104                 g_error_free(error);
 105                 return 2;
 106         }
 107
 108         volume = mixer_get_volume(mixer, &error);
 109         mixer_close(mixer);
 110         mixer_free(mixer);
 111
 112         assert(volume >= -1 && volume <= 100);
 113
 114         if (volume < 0) {
 115                 if (error != NULL) {
 116                         g_printerr("failed to read volume: %s\n",
 117                                    error->message);
 118                         g_error_free(error);
 119                 } else
 120                         g_printerr("failed to read volume\n");
 121                 return 2;
 122         }
 123
 124         g_print("%d\n", volume);
 125         return 0;
 126 }