diff options
Diffstat (limited to 'src/modules/module-match.c')
| -rw-r--r-- | src/modules/module-match.c | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/src/modules/module-match.c b/src/modules/module-match.c new file mode 100644 index 00000000..769a6b59 --- /dev/null +++ b/src/modules/module-match.c @@ -0,0 +1,245 @@ +/*** + This file is part of PulseAudio. + + Copyright 2004-2006 Lennart Poettering + + PulseAudio 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. + + PulseAudio 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 PulseAudio; 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 <string.h> +#include <errno.h> +#include <sys/types.h> +#include <regex.h> +#include <stdio.h> +#include <stdlib.h> + +#include <pulse/xmalloc.h> + +#include <pulsecore/core-error.h> +#include <pulsecore/module.h> +#include <pulsecore/core-util.h> +#include <pulsecore/modargs.h> +#include <pulsecore/log.h> +#include <pulsecore/core-subscribe.h> +#include <pulsecore/sink-input.h> +#include <pulsecore/core-util.h> + +#include "module-match-symdef.h" + +PA_MODULE_AUTHOR("Lennart Poettering"); +PA_MODULE_DESCRIPTION("Playback stream expression matching module"); +PA_MODULE_VERSION(PACKAGE_VERSION); +PA_MODULE_LOAD_ONCE(TRUE); +PA_MODULE_USAGE("table=<filename>"); + +#define WHITESPACE "\n\r \t" + +#define DEFAULT_MATCH_TABLE_FILE PA_DEFAULT_CONFIG_DIR"/match.table" +#define DEFAULT_MATCH_TABLE_FILE_USER "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; + + pa_assert(u); + + if (filename) + f = fopen(fn = pa_xstrdup(filename), "r"); + else + f = pa_open_config_file(DEFAULT_MATCH_TABLE_FILE, DEFAULT_MATCH_TABLE_FILE_USER, NULL, &fn); + + if (!f) { + pa_xfree(fn); + pa_log("Failed to open file config file: %s", pa_cstrerror(errno)); + goto finish; + } + + pa_lock_fd(fileno(f), 1); + + 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("[%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("[%s:%u] invalid regular expression", filename, n); + goto finish; + } + + rule = pa_xnew(struct rule, 1); + 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) { + pa_lock_fd(fileno(f), 0); + 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; + const char *n; + + pa_assert(c); + pa_assert(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 (!(n = pa_proplist_gets(si->proplist, PA_PROP_MEDIA_NAME))) + return; + + for (r = u->rules; r; r = r->next) { + if (!regexec(&r->regex, n, 0, NULL, 0)) { + pa_cvolume cv; + pa_log_debug("changing volume of sink input '%s' to 0x%03x", n, r->volume); + pa_cvolume_set(&cv, si->sample_spec.channels, r->volume); + pa_sink_input_set_volume(si, &cv); + } + } +} + +int pa__init(pa_module*m) { + pa_modargs *ma = NULL; + struct userdata *u; + + pa_assert(m); + + if (!(ma = pa_modargs_new(m->argument, valid_modargs))) { + pa_log("Failed to parse module arguments"); + goto fail; + } + + u = pa_xnew(struct userdata, 1); + 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(m->core, PA_SUBSCRIPTION_MASK_SINK_INPUT, callback, u); + + pa_modargs_free(ma); + return 0; + +fail: + pa__done(m); + + if (ma) + pa_modargs_free(ma); + return -1; +} + +void pa__done(pa_module*m) { + struct userdata* u; + struct rule *r, *n; + + pa_assert(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); +} |