/* * 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_all.h" #include "mixer_control.h" #include "output_all.h" #include "output_plugin.h" #include "output_internal.h" #include <glib.h> #include <assert.h> #undef G_LOG_DOMAIN #define G_LOG_DOMAIN "mixer" static int output_mixer_get_volume(unsigned i) { struct audio_output *output; struct mixer *mixer; assert(i < audio_output_count()); output = audio_output_get(i); if (!output->enabled) return -1; mixer = output->mixer; if (mixer == NULL) return -1; return mixer_get_volume(mixer); } int mixer_all_get_volume(void) { unsigned count = audio_output_count(), ok = 0; int volume, total = 0; for (unsigned i = 0; i < count; i++) { volume = output_mixer_get_volume(i); if (volume >= 0) { total += volume; ++ok; } } if (ok == 0) return -1; return total / ok; } static bool output_mixer_set_volume(unsigned i, int volume, bool relative) { struct audio_output *output; struct mixer *mixer; assert(i < audio_output_count()); output = audio_output_get(i); if (!output->enabled) return false; mixer = output->mixer; if (mixer == NULL) return false; if (relative) { int prev = mixer_get_volume(mixer); if (prev < 0) return false; volume += prev; } if (volume > 100) volume = 100; else if (volume < 0) volume = 0; return mixer_set_volume(mixer, volume); } bool mixer_all_set_volume(int volume, bool relative) { bool success = false; unsigned count = audio_output_count(); for (unsigned i = 0; i < count; i++) success = output_mixer_set_volume(i, volume, relative) || success; return success; }