test/software_volume.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  * This program is a command line interface to MPD's software volume
  22  * library (pcm_volume.c).
  23  *
  24  */
  25
  26 #include "config.h"
  27 #include "pcm_volume.h"
  28 #include "audio_parser.h"
  29 #include "audio_format.h"
  30
  31 #include <glib.h>
  32
  33 #include <stddef.h>
  34 #include <unistd.h>
  35
  36 int main(int argc, char **argv)
  37 {
  38         GError *error = NULL;
  39         struct audio_format audio_format;
  40         bool ret;
  41         static char buffer[4096];
  42         ssize_t nbytes;
  43
  44         if (argc > 2) {
  45                 g_printerr("Usage: software_volume [FORMAT] <IN >OUT\n");
  46                 return 1;
  47         }
  48
  49         if (argc > 1) {
  50                 ret = audio_format_parse(&audio_format, argv[1],
  51                                          false, &error);
  52                 if (!ret) {
  53                         g_printerr("Failed to parse audio format: %s\n",
  54                                    error->message);
  55                         return 1;
  56                 }
  57         } else
  58                 audio_format_init(&audio_format, 48000, SAMPLE_FORMAT_S16, 2);
  59
  60         while ((nbytes = read(0, buffer, sizeof(buffer))) > 0) {
  61                 if (!pcm_volume(buffer, nbytes, &audio_format,
  62                                 PCM_VOLUME_1 / 2)) {
  63                         g_printerr("pcm_volume() has failed\n");
  64                         return 2;
  65                 }
  66
  67                 write(1, buffer, nbytes);
  68         }
  69 }