/* * Copyright (C) 2003-2009 The Music Player Daemon Project * http://www.musicpd.org * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "mixer_control.h" #include "mixer_list.h" #include "filter_registry.h" #include "pcm_volume.h" #include "output/pulse_output_plugin.h" #include "event_pipe.h" #include <glib.h> #include <assert.h> #include <string.h> #include <unistd.h> void pulse_output_set_mixer(G_GNUC_UNUSED struct pulse_output *po, G_GNUC_UNUSED struct pulse_mixer *pm) { } void pulse_output_clear_mixer(G_GNUC_UNUSED struct pulse_output *po, G_GNUC_UNUSED struct pulse_mixer *pm) { } bool pulse_output_set_volume(G_GNUC_UNUSED struct pulse_output *po, G_GNUC_UNUSED const struct pa_cvolume *volume, G_GNUC_UNUSED GError **error_r) { return false; } void event_pipe_emit(G_GNUC_UNUSED enum pipe_event event) { } const struct filter_plugin * filter_plugin_by_name(G_GNUC_UNUSED const char *name) { assert(false); return NULL; } bool pcm_volume(G_GNUC_UNUSED void *buffer, G_GNUC_UNUSED int length, G_GNUC_UNUSED const struct audio_format *format, G_GNUC_UNUSED int volume) { assert(false); return false; } int main(int argc, G_GNUC_UNUSED char **argv) { GError *error = NULL; struct mixer *mixer; bool success; int volume; if (argc != 2) { g_printerr("Usage: read_mixer PLUGIN\n"); return 1; } g_thread_init(NULL); mixer = mixer_new(&alsa_mixer_plugin, NULL, NULL, &error); if (mixer == NULL) { g_printerr("mixer_new() failed: %s\n", error->message); g_error_free(error); return 2; } success = mixer_open(mixer, &error); if (!success) { mixer_free(mixer); g_printerr("failed to open the mixer: %s\n", error->message); g_error_free(error); return 2; } volume = mixer_get_volume(mixer, &error); mixer_close(mixer); mixer_free(mixer); assert(volume >= -1 && volume <= 100); if (volume < 0) { if (error != NULL) { g_printerr("failed to read volume: %s\n", error->message); g_error_free(error); } else g_printerr("failed to read volume\n"); return 2; } g_print("%d\n", volume); return 0; }