test/run_convert.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 PCM conversion
  22  * library (pcm_convert.c).
  23  *
  24  */
  25
  26 #include "config.h"
  27 #include "audio_parser.h"
  28 #include "audio_format.h"
  29 #include "pcm_convert.h"
  30 #include "conf.h"
  31 #include "fifo_buffer.h"
  32
  33 #include <glib.h>
  34
  35 #include <assert.h>
  36 #include <stddef.h>
  37 #include <unistd.h>
  38
  39 static void
  40 my_log_func(const gchar *log_domain, G_GNUC_UNUSED GLogLevelFlags log_level,
  41             const gchar *message, G_GNUC_UNUSED gpointer user_data)
  42 {
  43         if (log_domain != NULL)
  44                 g_printerr("%s: %s\n", log_domain, message);
  45         else
  46                 g_printerr("%s\n", message);
  47 }
  48
  49 const char *
  50 config_get_string(G_GNUC_UNUSED const char *name, const char *default_value)
  51 {
  52         return default_value;
  53 }
  54
  55 int main(int argc, char **argv)
  56 {
  57         GError *error = NULL;
  58         struct audio_format in_audio_format, out_audio_format;
  59         struct pcm_convert_state state;
  60         const void *output;
  61         ssize_t nbytes;
  62         size_t length;
  63
  64         if (argc != 3) {
  65                 g_printerr("Usage: run_convert IN_FORMAT OUT_FORMAT <IN >OUT\n");
  66                 return 1;
  67         }
  68
  69         g_log_set_default_handler(my_log_func, NULL);
  70
  71         if (!audio_format_parse(&in_audio_format, argv[1],
  72                                 false, &error)) {
  73                 g_printerr("Failed to parse audio format: %s\n",
  74                            error->message);
  75                 return 1;
  76         }
  77
  78         if (!audio_format_parse(&out_audio_format, argv[2],
  79                                 false, &error)) {
  80                 g_printerr("Failed to parse audio format: %s\n",
  81                            error->message);
  82                 return 1;
  83         }
  84
  85         const size_t in_frame_size = audio_format_frame_size(&in_audio_format);
  86
  87         pcm_convert_init(&state);
  88
  89         struct fifo_buffer *buffer = fifo_buffer_new(4096);
  90
  91         while (true) {
  92                 void *p = fifo_buffer_write(buffer, &length);
  93                 assert(p != NULL);
  94
  95                 nbytes = read(0, p, length);
  96                 if (nbytes <= 0)
  97                         break;
  98
  99                 fifo_buffer_append(buffer, nbytes);
 100
 101                 const void *src = fifo_buffer_read(buffer, &length);
 102                 assert(src != NULL);
 103
 104                 length -= length % in_frame_size;
 105                 if (length == 0)
 106                         continue;
 107
 108                 fifo_buffer_consume(buffer, length);
 109
 110                 output = pcm_convert(&state, &in_audio_format, src, length,
 111                                      &out_audio_format, &length, &error);
 112                 if (output == NULL) {
 113                         g_printerr("Failed to convert: %s\n", error->message);
 114                         return 2;
 115                 }
 116
 117                 write(1, output, length);
 118         }
 119
 120         pcm_convert_deinit(&state);
 121 }