interface.c

   1 /* interface.c - common parts of the simple LADSPA hosts
   2  * Copyright © 2013 Géraud Meyer <graud@gmx.com>
   3  *
   4  * This file is part of ng-jackspa.
   5  *
   6  * ng-jackspa is free software; you can redistribute it and/or modify it under
   7  * the terms of the GNU General Public License version 2 as published by the
   8  * Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with ng-jackspa.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "interface.h"
  20
  21 #ifdef __cplusplus
  22 extern "C" {
  23 #endif
  24
  25 /* PROGRAM_NAME must be defined by the interface */
  26 #define PACKAGE_NAME "ng-jackspa"
  27 #define PACKAGE_SUMMARY \
  28   PACKAGE_NAME " is a set of simple interfaces that host a LADSPA plugin, " \
  29   "providing JACK ports for its audio inputs and outputs, and dynamic setting " \
  30   "of its control inputs."
  31 #define PACKAGE_DESCRIPTION  "ng-jackspa is accompanied by a manual page."
  32
  33
  34 static gint verbose = 1;
  35 static gboolean verbose_more(const gchar *opt, const gchar *arg,
  36                              gpointer data, GError **error)
  37 { verbose++; return TRUE; }
  38 static gboolean verbose_less(const gchar *opt, const gchar *arg,
  39                              gpointer data, GError **error)
  40 { verbose--; return TRUE; }
  41
  42 static GOptionEntry interface_entries[] =
  43   {
  44     /* long, short, flags, arg_type, arg_data, description, arg_description */
  45     { "verbose", 'v', G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
  46           (gpointer)verbose_more, "Be more verbose", NULL },
  47     { "quiet", 'q', G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
  48           (gpointer)verbose_less, "Be quieter", NULL },
  49     { 0 }
  50   };
  51
  52 /* Return a member of a NULL-terminated string array */
  53 gchar *glib_strv_index(unsigned long i, gchar **str_array)
  54 {
  55         for (; str_array && *str_array && i; str_array++, i--);
  56           /* it seems *str_array should be set to NULL to mark the end */
  57         if (str_array)
  58                 return *str_array;
  59         return NULL;
  60 }
  61
  62
  63 GOptionContext * interface_context()
  64 {
  65         /* Context & Main entries */
  66         GOptionContext *context;
  67         context = g_option_context_new("PLUGIN_LIBRARY UID_OR_LABEL");
  68         g_option_context_set_help_enabled(context, TRUE);
  69         g_option_context_set_ignore_unknown_options(context, TRUE);
  70         g_option_context_set_summary
  71           (context, PROGRAM_NAME " is part of ng-jackspa.\n\n" PACKAGE_SUMMARY);
  72         g_option_context_set_description(context, PACKAGE_DESCRIPTION);
  73         g_option_context_add_main_entries(context, interface_entries, NULL);
  74
  75         /* Group of control options */
  76         GOptionGroup *control_group;
  77         control_group = g_option_group_new
  78           ( "control", "Control interface",
  79             "Show options of the control interface", NULL, NULL );
  80         g_option_group_add_entries(control_group, control_entries);
  81         g_option_context_add_group(context, control_group);
  82
  83         /* Group of jackspa options */
  84         GOptionGroup *jackspa_group;
  85         jackspa_group = g_option_group_new
  86           ( "jackspa", "JACK and LADSPA",
  87             "Show options of the jackspa module", NULL, NULL );
  88         g_option_group_add_entries(jackspa_group, jackspa_entries);
  89         g_option_context_add_group(context, jackspa_group);
  90
  91         return context;
  92 }
  93
  94 #ifdef __cplusplus
  95 } /* extern "C" */
  96 #endif