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/* $Id$ */
/***
This file is part of polypaudio.
polypaudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
polypaudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with polypaudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <regex.h>
#include <stdio.h>
#include <stdlib.h>
#include <polypcore/module.h>
#include <polypcore/util.h>
#include <polypcore/modargs.h>
#include <polypcore/log.h>
#include <polypcore/core-subscribe.h>
#include <polypcore/xmalloc.h>
#include <polypcore/sink-input.h>
#include "module-match-symdef.h"
PA_MODULE_AUTHOR("Lennart Poettering")
PA_MODULE_DESCRIPTION("Playback stream expression matching module")
PA_MODULE_USAGE("table=<filename>")
PA_MODULE_VERSION(PACKAGE_VERSION)
#define WHITESPACE "\n\r \t"
#ifndef DEFAULT_CONFIG_DIR
#define DEFAULT_CONFIG_DIR "/etc/polypaudio"
#endif
#define DEFAULT_MATCH_TABLE_FILE DEFAULT_CONFIG_DIR"/match.table"
#define DEFAULT_MATCH_TABLE_FILE_USER ".polypaudio/match.table"
static const char* const valid_modargs[] = {
"table",
NULL,
};
struct rule {
regex_t regex;
pa_volume_t volume;
struct rule *next;
};
struct userdata {
struct rule *rules;
pa_subscription *subscription;
};
static int load_rules(struct userdata *u, const char *filename) {
FILE *f;
int n = 0;
int ret = -1;
struct rule *end = NULL;
char *fn = NULL;
f = filename ?
fopen(fn = pa_xstrdup(filename), "r") :
pa_open_config_file(DEFAULT_MATCH_TABLE_FILE, DEFAULT_MATCH_TABLE_FILE_USER, NULL, &fn, "r");
if (!f) {
pa_log(__FILE__": failed to open file '%s': %s", fn, strerror(errno));
goto finish;
}
while (!feof(f)) {
char *d, *v;
pa_volume_t volume;
uint32_t k;
regex_t regex;
char ln[256];
struct rule *rule;
if (!fgets(ln, sizeof(ln), f))
break;
n++;
pa_strip_nl(ln);
if (ln[0] == '#' || !*ln )
continue;
d = ln+strcspn(ln, WHITESPACE);
v = d+strspn(d, WHITESPACE);
if (!*v) {
pa_log(__FILE__ ": [%s:%u] failed to parse line - too few words", filename, n);
goto finish;
}
*d = 0;
if (pa_atou(v, &k) < 0) {
pa_log(__FILE__": [%s:%u] failed to parse volume", filename, n);
goto finish;
}
volume = (pa_volume_t) k;
if (regcomp(®ex, ln, REG_EXTENDED|REG_NOSUB) != 0) {
pa_log(__FILE__": [%s:%u] invalid regular expression", filename, n);
goto finish;
}
rule = pa_xmalloc(sizeof(struct rule));
rule->regex = regex;
rule->volume = volume;
rule->next = NULL;
if (end)
end->next = rule;
else
u->rules = rule;
end = rule;
*d = 0;
}
ret = 0;
finish:
if (f)
fclose(f);
if (fn)
pa_xfree(fn);
return ret;
}
static void callback(pa_core *c, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
struct userdata *u = userdata;
pa_sink_input *si;
struct rule *r;
assert(c && u);
if (t != (PA_SUBSCRIPTION_EVENT_SINK_INPUT|PA_SUBSCRIPTION_EVENT_NEW))
return;
if (!(si = pa_idxset_get_by_index(c->sink_inputs, idx)))
return;
if (!si->name)
return;
for (r = u->rules; r; r = r->next) {
if (!regexec(&r->regex, si->name, 0, NULL, 0)) {
pa_cvolume cv;
pa_log_debug(__FILE__": changing volume of sink input '%s' to 0x%03x", si->name, r->volume);
pa_cvolume_set(&cv, r->volume, si->sample_spec.channels);
pa_sink_input_set_volume(si, &cv);
}
}
}
int pa__init(pa_core *c, pa_module*m) {
pa_modargs *ma = NULL;
struct userdata *u;
assert(c && m);
if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
pa_log(__FILE__": Failed to parse module arguments");
goto fail;
}
u = pa_xmalloc(sizeof(struct userdata));
u->rules = NULL;
u->subscription = NULL;
m->userdata = u;
if (load_rules(u, pa_modargs_get_value(ma, "table", NULL)) < 0)
goto fail;
u->subscription = pa_subscription_new(c, PA_SUBSCRIPTION_MASK_SINK_INPUT, callback, u);
pa_modargs_free(ma);
return 0;
fail:
pa__done(c, m);
if (ma)
pa_modargs_free(ma);
return -1;
}
void pa__done(pa_core *c, pa_module*m) {
struct userdata* u;
struct rule *r, *n;
assert(c && m);
if (!(u = m->userdata))
return;
if (u->subscription)
pa_subscription_free(u->subscription);
for (r = u->rules; r; r = n) {
n = r->next;
regfree(&r->regex);
pa_xfree(r);
}
pa_xfree(u);
}
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