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https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-03 09:01:50 -05:00
add new module module-zeroconf-discover
git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@1983 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering
parent
9f446590e3
commit
87be85618c
2 changed files with 346 additions and 1 deletions
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@ -1019,7 +1019,8 @@ endif
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if HAVE_AVAHI
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modlibexec_LTLIBRARIES += \
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module-zeroconf-publish.la
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module-zeroconf-publish.la \
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module-zeroconf-discover.la
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endif
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if HAVE_LIRC
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@ -1084,6 +1085,7 @@ SYMDEF_FILES = \
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modules/module-null-sink-symdef.h \
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modules/module-esound-sink-symdef.h \
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modules/module-zeroconf-publish-symdef.h \
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modules/module-zeroconf-discover-symdef.h \
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modules/module-lirc-symdef.h \
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modules/module-mmkbd-evdev-symdef.h \
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modules/module-http-protocol-tcp-symdef.h \
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@ -1303,6 +1305,11 @@ module_zeroconf_publish_la_LDFLAGS = -module -avoid-version
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module_zeroconf_publish_la_LIBADD = $(AM_LIBADD) $(AVAHI_LIBS) libavahi-wrap.la libpulsecore.la
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module_zeroconf_publish_la_CFLAGS = $(AM_CFLAGS) $(AVAHI_CFLAGS)
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module_zeroconf_discover_la_SOURCES = modules/module-zeroconf-discover.c
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module_zeroconf_discover_la_LDFLAGS = -module -avoid-version
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module_zeroconf_discover_la_LIBADD = $(AM_LIBADD) $(AVAHI_LIBS) libavahi-wrap.la libpulsecore.la
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module_zeroconf_discover_la_CFLAGS = $(AM_CFLAGS) $(AVAHI_CFLAGS)
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# LIRC
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module_lirc_la_SOURCES = modules/module-lirc.c
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338
src/modules/module-zeroconf-discover.c
Normal file
338
src/modules/module-zeroconf-discover.c
Normal file
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@ -0,0 +1,338 @@
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/* $Id$ */
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/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <avahi-client/client.h>
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#include <avahi-client/lookup.h>
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#include <avahi-common/alternative.h>
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#include <avahi-common/error.h>
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#include <avahi-common/domain.h>
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#include <avahi-common/malloc.h>
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#include <pulse/xmalloc.h>
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#include <pulse/util.h>
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#include <pulsecore/sink.h>
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#include <pulsecore/source.h>
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#include <pulsecore/native-common.h>
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#include <pulsecore/core-util.h>
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#include <pulsecore/log.h>
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#include <pulsecore/core-subscribe.h>
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#include <pulsecore/dynarray.h>
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#include <pulsecore/modargs.h>
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#include <pulsecore/namereg.h>
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#include <pulsecore/avahi-wrap.h>
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#include "module-zeroconf-discover-symdef.h"
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PA_MODULE_AUTHOR("Lennart Poettering")
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PA_MODULE_DESCRIPTION("mDNS/DNS-SD Service Discovery")
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PA_MODULE_VERSION(PACKAGE_VERSION)
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#define SERVICE_TYPE_SINK "_pulse-sink._tcp"
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#define SERVICE_TYPE_SOURCE "_non-monitor._sub._pulse-source._tcp"
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static const char* const valid_modargs[] = {
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NULL
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};
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struct userdata {
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pa_core *core;
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pa_module *module;
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AvahiPoll *avahi_poll;
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AvahiClient *client;
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AvahiServiceBrowser *source_browser, *sink_browser;
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};
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static void resolver_cb(
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AvahiServiceResolver *r,
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AvahiIfIndex interface, AvahiProtocol protocol,
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AvahiResolverEvent event,
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const char *name, const char *type, const char *domain,
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const char *host_name, const AvahiAddress *a, uint16_t port,
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AvahiStringList *txt,
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AvahiLookupResultFlags flags,
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void *userdata) {
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struct userdata *u = userdata;
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pa_assert(u);
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if (event != AVAHI_RESOLVER_FOUND)
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pa_log("Resolving of '%s' failed: %s", name, avahi_strerror(avahi_client_errno(u->client)));
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else {
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char *device = NULL, *dname, *module_name, *args;
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const char *t;
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char at[AVAHI_ADDRESS_STR_MAX], cmt[PA_CHANNEL_MAP_SNPRINT_MAX];
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pa_sample_spec ss;
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pa_channel_map cm;
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AvahiStringList *l;
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pa_bool_t channel_map_set = FALSE;
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ss = u->core->default_sample_spec;
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pa_channel_map_init_auto(&cm, ss.channels, PA_CHANNEL_MAP_DEFAULT);
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for (l = txt; l; l = l->next) {
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char *key, *value;
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pa_assert_se(avahi_string_list_get_pair(l, &key, &value, NULL) == 0);
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if (strcmp(key, "device") == 0) {
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pa_xfree(device);
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device = value;
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value = NULL;
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} else if (strcmp(key, "rate") == 0)
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ss.rate = atoi(value);
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else if (strcmp(key, "channels") == 0)
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ss.channels = atoi(value);
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else if (strcmp(key, "format") == 0)
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ss.format = pa_parse_sample_format(value);
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else if (strcmp(key, "channel_map") == 0) {
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pa_channel_map_parse(&cm, value);
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channel_map_set = TRUE;
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}
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avahi_free(key);
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avahi_free(value);
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}
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if (!channel_map_set && cm.channels != ss.channels)
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pa_channel_map_init_auto(&cm, ss.channels, PA_CHANNEL_MAP_DEFAULT);
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if (!pa_sample_spec_valid(&ss)) {
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pa_log("Service '%s' contains an invalid sample specification.", name);
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avahi_free(device);
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goto finish;
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}
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if (!pa_channel_map_valid(&cm) || cm.channels != ss.channels) {
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pa_log("Service '%s' contains an invalid channel map.", name);
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avahi_free(device);
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goto finish;
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}
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if (device)
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dname = pa_sprintf_malloc("tunnel.%s.%s", host_name, device);
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else
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dname = pa_sprintf_malloc("tunnel.%s", host_name);
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if (!pa_namereg_is_valid_name(dname)) {
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pa_log("Cannot construct valid device name from credentials of service '%s'.", dname);
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avahi_free(device);
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pa_xfree(dname);
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goto finish;
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}
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t = strstr(type, "sink") ? "sink" : "source";
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module_name = pa_sprintf_malloc("module-tunnel-%s", t);
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args = pa_sprintf_malloc("server=[%s]:%u "
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"%s=%s "
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"format=%s "
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"channels=%u "
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"rate=%u "
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"%s_name=%s "
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"channel_map=%s",
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avahi_address_snprint(at, sizeof(at), a), port,
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t, device,
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pa_sample_format_to_string(ss.format),
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ss.channels,
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ss.rate,
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t, dname,
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pa_channel_map_snprint(cmt, sizeof(cmt), &cm));
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pa_log_debug("Loading module-tunnel-%s with arguments '%s'", module_name, args);
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pa_module_load(u->core, module_name, args);
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pa_xfree(module_name);
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pa_xfree(dname);
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pa_xfree(args);
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avahi_free(device);
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}
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finish:
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avahi_service_resolver_free(r);
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}
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static void browser_cb(
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AvahiServiceBrowser *b,
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AvahiIfIndex interface, AvahiProtocol protocol,
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AvahiBrowserEvent event,
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const char *name, const char *type, const char *domain,
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AvahiLookupResultFlags flags,
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void *userdata) {
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struct userdata *u = userdata;
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pa_assert(u);
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if (event != AVAHI_BROWSER_NEW)
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return;
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if (flags & AVAHI_LOOKUP_RESULT_LOCAL)
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return;
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if (!(avahi_service_resolver_new(u->client, interface, protocol, name, type, domain, AVAHI_PROTO_UNSPEC, 0, resolver_cb, u)))
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pa_log("avahi_service_resolver_new() failed: %s", avahi_strerror(avahi_client_errno(u->client)));
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/* We ignore the returned resolver object here, since the we don't
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* need to attach any special data to it, and we can still destory
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* it from the callback */
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}
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static void client_callback(AvahiClient *c, AvahiClientState state, void *userdata) {
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struct userdata *u = userdata;
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pa_assert(c);
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pa_assert(u);
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u->client = c;
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switch (state) {
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case AVAHI_CLIENT_S_REGISTERING:
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case AVAHI_CLIENT_S_RUNNING:
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case AVAHI_CLIENT_S_COLLISION:
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if (!u->sink_browser) {
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if (!(u->sink_browser = avahi_service_browser_new(
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c,
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AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
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SERVICE_TYPE_SINK,
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NULL,
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0,
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browser_cb, u))) {
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pa_log("avahi_service_browser_new() failed: %s", avahi_strerror(avahi_client_errno(c)));
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pa_module_unload_request(u->module);
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}
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}
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if (!u->source_browser) {
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if (!(u->source_browser = avahi_service_browser_new(
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c,
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AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC,
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SERVICE_TYPE_SOURCE,
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NULL,
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0,
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browser_cb, u))) {
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pa_log("avahi_service_browser_new() failed: %s", avahi_strerror(avahi_client_errno(c)));
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pa_module_unload_request(u->module);
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}
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}
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break;
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case AVAHI_CLIENT_FAILURE:
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if (avahi_client_errno(c) == AVAHI_ERR_DISCONNECTED) {
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int error;
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pa_log_debug("Avahi daemon disconnected.");
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if (!(u->client = avahi_client_new(u->avahi_poll, AVAHI_CLIENT_NO_FAIL, client_callback, u, &error))) {
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pa_log("avahi_client_new() failed: %s", avahi_strerror(error));
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pa_module_unload_request(u->module);
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}
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}
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/* Fall through */
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case AVAHI_CLIENT_CONNECTING:
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if (u->sink_browser) {
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avahi_service_browser_free(u->sink_browser);
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u->sink_browser = NULL;
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}
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if (u->source_browser) {
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avahi_service_browser_free(u->source_browser);
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u->source_browser = NULL;
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}
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break;
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default: ;
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}
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}
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int pa__init(pa_module*m) {
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struct userdata *u;
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pa_modargs *ma = NULL;
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int error;
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if (!(ma = pa_modargs_new(m->argument, valid_modargs))) {
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pa_log("Failed to parse module arguments.");
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goto fail;
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}
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m->userdata = u = pa_xnew(struct userdata, 1);
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u->core = m->core;
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u->module = m;
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u->sink_browser = u->source_browser = NULL;
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u->avahi_poll = pa_avahi_poll_new(m->core->mainloop);
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if (!(u->client = avahi_client_new(u->avahi_poll, AVAHI_CLIENT_NO_FAIL, client_callback, u, &error))) {
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pa_log("pa_avahi_client_new() failed: %s", avahi_strerror(error));
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goto fail;
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}
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pa_modargs_free(ma);
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return 0;
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fail:
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pa__done(m);
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if (ma)
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pa_modargs_free(ma);
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return -1;
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}
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void pa__done(pa_module*m) {
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struct userdata*u;
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pa_assert(m);
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if (!(u = m->userdata))
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return;
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if (u->client)
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avahi_client_free(u->client);
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if (u->avahi_poll)
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pa_avahi_poll_free(u->avahi_poll);
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pa_xfree(u);
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}
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