test/run_filter.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 "config.h"
  21 #include "conf.h"
  22 #include "audio_parser.h"
  23 #include "audio_format.h"
  24 #include "filter_plugin.h"
  25 #include "pcm_volume.h"
  26 #include "idle.h"
  27 #include "mixer_control.h"
  28
  29 #include <glib.h>
  30
  31 #include <assert.h>
  32 #include <string.h>
  33 #include <errno.h>
  34 #include <unistd.h>
  35
  36 void
  37 idle_add(G_GNUC_UNUSED unsigned flags)
  38 {
  39 }
  40
  41 bool
  42 mixer_set_volume(G_GNUC_UNUSED struct mixer *mixer,
  43                  G_GNUC_UNUSED unsigned volume, G_GNUC_UNUSED GError **error_r)
  44 {
  45         return true;
  46 }
  47
  48 static void
  49 my_log_func(const gchar *log_domain, G_GNUC_UNUSED GLogLevelFlags log_level,
  50             const gchar *message, G_GNUC_UNUSED gpointer user_data)
  51 {
  52         if (log_domain != NULL)
  53                 g_printerr("%s: %s\n", log_domain, message);
  54         else
  55                 g_printerr("%s\n", message);
  56 }
  57
  58 static const struct config_param *
  59 find_named_config_block(const char *block, const char *name)
  60 {
  61         const struct config_param *param = NULL;
  62
  63         while ((param = config_get_next_param(block, param)) != NULL) {
  64                 const char *current_name =
  65                         config_get_block_string(param, "name", NULL);
  66                 if (current_name != NULL && strcmp(current_name, name) == 0)
  67                         return param;
  68         }
  69
  70         return NULL;
  71 }
  72
  73 static struct filter *
  74 load_filter(const char *name)
  75 {
  76         const struct config_param *param;
  77         struct filter *filter;
  78         GError *error = NULL;
  79
  80         param = find_named_config_block("filter", name);
  81         if (param == NULL) {
  82                 g_printerr("No such configured filter: %s\n", name);
  83                 return false;
  84         }
  85
  86         filter = filter_configured_new(param, &error);
  87         if (filter == NULL) {
  88                 g_printerr("Failed to load filter: %s\n", error->message);
  89                 g_error_free(error);
  90                 return NULL;
  91         }
  92
  93         return filter;
  94 }
  95
  96 int main(int argc, char **argv)
  97 {
  98         struct audio_format audio_format;
  99         struct audio_format_string af_string;
 100         bool success;
 101         GError *error = NULL;
 102         struct filter *filter;
 103         const struct audio_format *out_audio_format;
 104         char buffer[4096];
 105         size_t frame_size;
 106
 107         if (argc < 3 || argc > 4) {
 108                 g_printerr("Usage: run_filter CONFIG NAME [FORMAT] <IN\n");
 109                 return 1;
 110         }
 111
 112         audio_format_init(&audio_format, 44100, SAMPLE_FORMAT_S16, 2);
 113
 114         /* initialize GLib */
 115
 116         g_thread_init(NULL);
 117         g_log_set_default_handler(my_log_func, NULL);
 118
 119         /* read configuration file (mpd.conf) */
 120
 121         config_global_init();
 122         success = config_read_file(argv[1], &error);
 123         if (!success) {
 124                 g_printerr("%s:", error->message);
 125                 g_error_free(error);
 126                 return 1;
 127         }
 128
 129         /* parse the audio format */
 130
 131         if (argc > 3) {
 132                 success = audio_format_parse(&audio_format, argv[3],
 133                                              false, &error);
 134                 if (!success) {
 135                         g_printerr("Failed to parse audio format: %s\n",
 136                                    error->message);
 137                         g_error_free(error);
 138                         return 1;
 139                 }
 140         }
 141
 142         /* initialize the filter */
 143
 144         filter = load_filter(argv[2]);
 145         if (filter == NULL)
 146                 return 1;
 147
 148         /* open the filter */
 149
 150         out_audio_format = filter_open(filter, &audio_format, &error);
 151         if (out_audio_format == NULL) {
 152                 g_printerr("Failed to open filter: %s\n", error->message);
 153                 g_error_free(error);
 154                 filter_free(filter);
 155                 return 1;
 156         }
 157
 158         g_printerr("audio_format=%s\n",
 159                    audio_format_to_string(out_audio_format, &af_string));
 160
 161         frame_size = audio_format_frame_size(&audio_format);
 162
 163         /* play */
 164
 165         while (true) {
 166                 ssize_t nbytes;
 167                 size_t length;
 168                 const void *dest;
 169
 170                 nbytes = read(0, buffer, sizeof(buffer));
 171                 if (nbytes <= 0)
 172                         break;
 173
 174                 dest = filter_filter(filter, buffer, (size_t)nbytes,
 175                                      &length, &error);
 176                 if (dest == NULL) {
 177                         g_printerr("Filter failed: %s\n", error->message);
 178                         filter_close(filter);
 179                         filter_free(filter);
 180                         return 1;
 181                 }
 182
 183                 nbytes = write(1, dest, length);
 184                 if (nbytes < 0) {
 185                         g_printerr("Failed to write: %s\n", strerror(errno));
 186                         filter_close(filter);
 187                         filter_free(filter);
 188                         return 1;
 189                 }
 190         }
 191
 192         /* cleanup and exit */
 193
 194         filter_close(filter);
 195         filter_free(filter);
 196
 197         config_global_finish();
 198
 199         return 0;
 200 }