/* * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * This program is a command line interface to MPD's software volume * library (pcm_volume.c). * */ #include "pcm_volume.h" #include "audio_parser.h" #include "audio_format.h" #include <glib.h> #include <stddef.h> #include <unistd.h> int main(int argc, char **argv) { GError *error = NULL; struct audio_format audio_format = { .sample_rate = 48000, .bits = 16, .channels = 2, }; bool ret; static char buffer[4096]; ssize_t nbytes; if (argc > 2) { g_printerr("Usage: software_voluem [FORMAT] <IN >OUT\n"); return 1; } if (argc > 1) { ret = audio_format_parse(&audio_format, argv[1], &error); if (!ret) { g_printerr("Failed to parse audio format: %s\n", error->message); return 1; } } while ((nbytes = read(0, buffer, sizeof(buffer))) > 0) { pcm_volume(buffer, nbytes, &audio_format, PCM_VOLUME_1 / 2); write(1, buffer, nbytes); } }