1 /* Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
3 /** \file filter.c The stand-alone filter program. */
8 #include "filter.lsg.h"
9 #include "filter_cmd.lsg.h"
14 #include "buffer_tree.h"
23 /** Array of error strings. */
25 static struct lls_parse_result *lpr; /* command line options */
27 #define CMD_PTR (lls_cmd(0, filter_suite))
28 #define OPT_RESULT(_name) \
29 (lls_opt_result(LSG_FILTER_PARA_FILTER_OPT_ ## _name, lpr))
30 #define OPT_GIVEN(_name) (lls_opt_given(OPT_RESULT(_name)))
31 #define OPT_UINT32_VAL(_name) (lls_uint32_val(0, OPT_RESULT(_name)))
33 /** The list of all status items used by para_{server,audiod,gui}. */
34 const char *status_item_list[] = {STATUS_ITEMS};
37 * Dummy version which only contains NULL pointers.
39 * This is used by the amp filter which first tries to obtain the amplification
40 * value from an element in this array.
42 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
44 /** The task that reads from stdin. */
45 static struct stdin_task stdin_task_struct;
46 /** pointer to the stdin task. */
47 static struct stdin_task *sit = &stdin_task_struct;
49 /** The task that writes converted data to stdout. */
50 static struct stdout_task stdout_task_struct;
51 /** Pointer to the stdout task. */
52 static struct stdout_task *sot = &stdout_task_struct;
55 INIT_STDERR_LOGGING(loglevel);
57 static void handle_help_flag(void)
61 if (OPT_GIVEN(DETAILED_HELP))
62 help = lls_long_help(CMD_PTR);
63 else if (OPT_GIVEN(HELP))
64 help = lls_short_help(CMD_PTR);
69 print_filter_helps(OPT_GIVEN(DETAILED_HELP));
73 static int parse_config(void)
77 version_handle_flag("filter", OPT_GIVEN(VERSION));
79 ret = lsu_merge_config_file_options(NULL, "filter.conf",
80 &lpr, CMD_PTR, filter_suite, 0 /* default flags */);
83 loglevel = OPT_UINT32_VAL(LOGLEVEL);
84 if (!OPT_GIVEN(FILTER)) {
92 * The main function of para_filter.
94 * Para_filter reads data from stdin, converts it by using a chain
95 * of filters (specified on the command line) and writes the resulting
98 * \param argc Number of command line options.
99 * \param argv Vector of arguments.
101 * \return \a EXIT_SUCCESS on success, EXIT_FAILURE on errors.
103 int main(int argc, char *argv[])
105 static struct sched s;
107 const struct filter *f;
108 struct btr_node *parent;
109 struct filter_node **fns;
110 struct lls_parse_result *filter_lpr; /* per-filter options */
113 ret = lls(lls_parse(argc, argv, CMD_PTR, &lpr, &errctx));
116 ret = parse_config();
119 sit->btrn = btr_new_node(&(struct btr_node_description)
120 EMBRACE(.name = "stdin"));
121 stdin_task_register(sit, &s);
123 fns = para_malloc(OPT_GIVEN(FILTER) * sizeof(*fns));
124 for (i = 0, parent = sit->btrn; i < OPT_GIVEN(FILTER); i++) {
125 const char *fa = lls_string_val(i, OPT_RESULT(FILTER));
127 struct filter_node *fn;
130 fn = fns[i] = para_calloc(sizeof(*fn));
131 fn->filter_num = filter_setup(fa, &fn->conf, &filter_lpr);
132 name = filter_name(fn->filter_num);
133 fn->lpr = filter_lpr;
134 PARA_DEBUG_LOG("filter #%d: %s\n", i, name);
135 f = filter_get(fn->filter_num);
136 fn->btrn = btr_new_node(&(struct btr_node_description)
137 EMBRACE(.name = name, .parent = parent,
138 .handler = f->execute, .context = fn));
140 ti.pre_select = f->pre_select;
141 ti.post_select = f->post_select;
145 fn->task = task_register(&ti, &s);
148 sot->btrn = btr_new_node(&(struct btr_node_description)
149 EMBRACE(.name = "stdout", .parent = parent));
150 stdout_task_register(sot, &s);
152 s.default_timeout = 1000;
153 btr_log_tree(sit->btrn, LL_INFO);
156 for (i--; i >= 0; i--) {
157 struct filter_node *fn = fns[i];
159 f = filter_get(fn->filter_num);
162 btr_remove_node(&fn->btrn);
164 f->teardown(fn->lpr, fn->conf);
168 btr_remove_node(&sit->btrn);
169 btr_remove_node(&sot->btrn);
171 lls_free_parse_result(lpr, CMD_PTR);
175 PARA_ERROR_LOG("%s\n", errctx);
177 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
179 exit(ret < 0? EXIT_FAILURE : EXIT_SUCCESS);