src/audio_format.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 "audio_format.h"
  21
  22 #include <assert.h>
  23 #include <stdio.h>
  24
  25 #if G_BYTE_ORDER == G_BIG_ENDIAN
  26 #define REVERSE_ENDIAN_SUFFIX "_le"
  27 #else
  28 #define REVERSE_ENDIAN_SUFFIX "_be"
  29 #endif
  30
  31 const char *
  32 sample_format_to_string(enum sample_format format)
  33 {
  34         switch (format) {
  35         case SAMPLE_FORMAT_UNDEFINED:
  36                 return "?";
  37
  38         case SAMPLE_FORMAT_S8:
  39                 return "8";
  40
  41         case SAMPLE_FORMAT_S16:
  42                 return "16";
  43
  44         case SAMPLE_FORMAT_S24:
  45                 return "24_3";
  46
  47         case SAMPLE_FORMAT_S24_P32:
  48                 return "24";
  49
  50         case SAMPLE_FORMAT_S32:
  51                 return "32";
  52         }
  53
  54         /* unreachable */
  55         assert(false);
  56         return "?";
  57 }
  58
  59 const char *
  60 audio_format_to_string(const struct audio_format *af,
  61                        struct audio_format_string *s)
  62 {
  63         assert(af != NULL);
  64         assert(s != NULL);
  65
  66         snprintf(s->buffer, sizeof(s->buffer), "%u:%s%s:%u",
  67                  af->sample_rate, sample_format_to_string(af->format),
  68                  af->reverse_endian ? REVERSE_ENDIAN_SUFFIX : "",
  69                  af->channels);
  70
  71         return s->buffer;
  72 }