really create glitch-free branch

git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/glitch-free@2120 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 453 insertions, 0 deletions

diff --git a/src/pulse/browser.c b/src/pulse/browser.c
new file mode 100644
index 00000000..55e0b2cd
--- /dev/null
+++ b/src/pulse/browser.c
@@ -0,0 +1,453 @@
+/* $Id$ */
+
+/***
+  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 <string.h>
+
+#include <avahi-client/lookup.h>
+#include <avahi-common/domain.h>
+#include <avahi-common/error.h>
+
+#include <pulse/xmalloc.h>
+
+#include <pulsecore/log.h>
+#include <pulsecore/core-util.h>
+#include <pulsecore/avahi-wrap.h>
+#include <pulsecore/refcnt.h>
+#include <pulsecore/macro.h>
+
+#include "browser.h"
+
+#define SERVICE_TYPE_SINK "_pulse-sink._tcp."
+#define SERVICE_TYPE_SOURCE "_pulse-source._tcp."
+#define SERVICE_TYPE_SERVER "_pulse-server._tcp."
+
+struct pa_browser {
+    PA_REFCNT_DECLARE;
+
+    pa_mainloop_api *mainloop;
+    AvahiPoll* avahi_poll;
+
+    pa_browse_cb_t callback;
+    void *userdata;
+
+    pa_browser_error_cb_t error_callback;
+    void *error_userdata;
+
+    AvahiClient *client;
+    AvahiServiceBrowser *server_browser, *sink_browser, *source_browser;
+
+};
+
+static int map_to_opcode(const char *type, int new) {
+
+    if (avahi_domain_equal(type, SERVICE_TYPE_SINK))
+        return new ? PA_BROWSE_NEW_SINK : PA_BROWSE_REMOVE_SINK;
+    else if (avahi_domain_equal(type, SERVICE_TYPE_SOURCE))
+        return new ? PA_BROWSE_NEW_SOURCE : PA_BROWSE_REMOVE_SOURCE;
+    else if (avahi_domain_equal(type, SERVICE_TYPE_SERVER))
+        return new ? PA_BROWSE_NEW_SERVER : PA_BROWSE_REMOVE_SERVER;
+
+    return -1;
+}
+
+static void resolve_callback(
+        AvahiServiceResolver *r,
+        AvahiIfIndex interface,
+        AvahiProtocol protocol,
+        AvahiResolverEvent event,
+        const char *name,
+        const char *type,
+        const char *domain,
+        const char *host_name,
+        const AvahiAddress *aa,
+        uint16_t port,
+        AvahiStringList *txt,
+        AvahiLookupResultFlags flags,
+        void *userdata) {
+
+    pa_browser *b = userdata;
+    pa_browse_info i;
+    char ip[256], a[256];
+    int opcode;
+    int device_found = 0;
+    uint32_t cookie;
+    pa_sample_spec ss;
+    int ss_valid = 0;
+    char *key = NULL, *value = NULL;
+
+    pa_assert(b);
+    pa_assert(PA_REFCNT_VALUE(b) >= 1);
+
+    memset(&i, 0, sizeof(i));
+    i.name = name;
+
+    if (event != AVAHI_RESOLVER_FOUND)
+        goto fail;
+
+    if (!b->callback)
+        goto fail;
+
+    opcode = map_to_opcode(type, 1);
+    pa_assert(opcode >= 0);
+
+    if (aa->proto == AVAHI_PROTO_INET)
+        pa_snprintf(a, sizeof(a), "tcp:%s:%u", avahi_address_snprint(ip, sizeof(ip), aa), port);
+    else {
+        pa_assert(aa->proto == AVAHI_PROTO_INET6);
+        pa_snprintf(a, sizeof(a), "tcp6:%s:%u", avahi_address_snprint(ip, sizeof(ip), aa), port);
+    }
+    i.server = a;
+
+
+    while (txt) {
+
+        if (avahi_string_list_get_pair(txt, &key, &value, NULL) < 0)
+            break;
+
+        if (!strcmp(key, "device")) {
+            device_found = 1;
+            pa_xfree((char*) i.device);
+            i.device = value;
+            value = NULL;
+        } else if (!strcmp(key, "server-version")) {
+            pa_xfree((char*) i.server_version);
+            i.server_version = value;
+            value = NULL;
+        } else if (!strcmp(key, "user-name")) {
+            pa_xfree((char*) i.user_name);
+            i.user_name = value;
+            value = NULL;
+        } else if (!strcmp(key, "fqdn")) {
+            size_t l;
+
+            pa_xfree((char*) i.fqdn);
+            i.fqdn = value;
+            value = NULL;
+
+            l = strlen(a);
+            pa_assert(l+1 <= sizeof(a));
+            strncat(a, " ", sizeof(a)-l-1);
+            strncat(a, i.fqdn, sizeof(a)-l-2);
+        } else if (!strcmp(key, "cookie")) {
+
+            if (pa_atou(value, &cookie) < 0)
+                goto fail;
+
+            i.cookie = &cookie;
+        } else if (!strcmp(key, "description")) {
+            pa_xfree((char*) i.description);
+            i.description = value;
+            value = NULL;
+        } else if (!strcmp(key, "channels")) {
+            uint32_t ch;
+
+            if (pa_atou(value, &ch) < 0 || ch <= 0 || ch > 255)
+                goto fail;
+
+            ss.channels = (uint8_t) ch;
+            ss_valid |= 1;
+
+        } else if (!strcmp(key, "rate")) {
+            if (pa_atou(value, &ss.rate) < 0)
+                goto fail;
+            ss_valid |= 2;
+        } else if (!strcmp(key, "format")) {
+
+            if ((ss.format = pa_parse_sample_format(value)) == PA_SAMPLE_INVALID)
+                goto fail;
+
+            ss_valid |= 4;
+        }
+
+        pa_xfree(key);
+        pa_xfree(value);
+        key = value = NULL;
+
+        txt = avahi_string_list_get_next(txt);
+    }
+
+    /* No device txt record was sent for a sink or source service */
+    if (opcode != PA_BROWSE_NEW_SERVER && !device_found)
+        goto fail;
+
+    if (ss_valid == 7)
+        i.sample_spec = &ss;
+
+    b->callback(b, opcode, &i, b->userdata);
+
+fail:
+    pa_xfree((void*) i.device);
+    pa_xfree((void*) i.fqdn);
+    pa_xfree((void*) i.server_version);
+    pa_xfree((void*) i.user_name);
+    pa_xfree((void*) i.description);
+
+    pa_xfree(key);
+    pa_xfree(value);
+
+    avahi_service_resolver_free(r);
+}
+
+static void handle_failure(pa_browser *b) {
+    const char *e = NULL;
+
+    pa_assert(b);
+    pa_assert(PA_REFCNT_VALUE(b) >= 1);
+
+    if (b->sink_browser)
+        avahi_service_browser_free(b->sink_browser);
+    if (b->source_browser)
+        avahi_service_browser_free(b->source_browser);
+    if (b->server_browser)
+        avahi_service_browser_free(b->server_browser);
+
+    b->sink_browser = b->source_browser = b->server_browser = NULL;
+
+    if (b->client) {
+        e = avahi_strerror(avahi_client_errno(b->client));
+        avahi_client_free(b->client);
+    }
+
+    b->client = NULL;
+
+    if (b->error_callback)
+        b->error_callback(b, e, b->error_userdata);
+}
+
+static void browse_callback(
+        AvahiServiceBrowser *sb,
+        AvahiIfIndex interface,
+        AvahiProtocol protocol,
+        AvahiBrowserEvent event,
+        const char *name,
+        const char *type,
+        const char *domain,
+        AvahiLookupResultFlags flags,
+        void *userdata) {
+
+    pa_browser *b = userdata;
+
+    pa_assert(b);
+    pa_assert(PA_REFCNT_VALUE(b) >= 1);
+
+    switch (event) {
+        case AVAHI_BROWSER_NEW: {
+
+            if (!avahi_service_resolver_new(
+                          b->client,
+                          interface,
+                          protocol,
+                          name,
+                          type,
+                          domain,
+                          AVAHI_PROTO_UNSPEC,
+                          0,
+                          resolve_callback,
+                          b))
+                handle_failure(b);
+
+            break;
+        }
+
+        case AVAHI_BROWSER_REMOVE: {
+
+            if (b->callback) {
+                pa_browse_info i;
+                int opcode;
+
+                memset(&i, 0, sizeof(i));
+                i.name = name;
+
+                opcode = map_to_opcode(type, 0);
+                pa_assert(opcode >= 0);
+
+                b->callback(b, opcode, &i, b->userdata);
+            }
+            break;
+        }
+
+        case AVAHI_BROWSER_FAILURE: {
+            handle_failure(b);
+            break;
+        }
+
+        default:
+            ;
+    }
+}
+
+static void client_callback(AvahiClient *s, AvahiClientState state, void *userdata) {
+    pa_browser *b = userdata;
+
+    pa_assert(s);
+    pa_assert(b);
+    pa_assert(PA_REFCNT_VALUE(b) >= 1);
+
+    if (state == AVAHI_CLIENT_FAILURE)
+        handle_failure(b);
+}
+
+static void browser_free(pa_browser *b);
+
+pa_browser *pa_browser_new(pa_mainloop_api *mainloop) {
+    return pa_browser_new_full(mainloop, PA_BROWSE_FOR_SERVERS|PA_BROWSE_FOR_SINKS|PA_BROWSE_FOR_SOURCES, NULL);
+}
+
+pa_browser *pa_browser_new_full(pa_mainloop_api *mainloop, pa_browse_flags_t flags, const char **error_string) {
+    pa_browser *b;
+    int error;
+
+    pa_assert(mainloop);
+
+    if (flags & ~(PA_BROWSE_FOR_SERVERS|PA_BROWSE_FOR_SINKS|PA_BROWSE_FOR_SOURCES) || flags == 0)
+        return NULL;
+
+    b = pa_xnew(pa_browser, 1);
+    b->mainloop = mainloop;
+    PA_REFCNT_INIT(b);
+    b->callback = NULL;
+    b->userdata = NULL;
+    b->error_callback = NULL;
+    b->error_userdata = NULL;
+    b->sink_browser = b->source_browser = b->server_browser = NULL;
+
+    b->avahi_poll = pa_avahi_poll_new(mainloop);
+
+    if (!(b->client = avahi_client_new(b->avahi_poll, 0, client_callback, b, &error))) {
+        if (error_string)
+            *error_string = avahi_strerror(error);
+        goto fail;
+    }
+
+    if ((flags & PA_BROWSE_FOR_SERVERS) &&
+        !(b->server_browser = avahi_service_browser_new(
+                  b->client,
+                  AVAHI_IF_UNSPEC,
+                  AVAHI_PROTO_INET,
+                  SERVICE_TYPE_SERVER,
+                  NULL,
+                  0,
+                  browse_callback,
+                  b))) {
+
+        if (error_string)
+            *error_string = avahi_strerror(avahi_client_errno(b->client));
+        goto fail;
+    }
+
+    if ((flags & PA_BROWSE_FOR_SINKS) &&
+        !(b->sink_browser = avahi_service_browser_new(
+                  b->client,
+                  AVAHI_IF_UNSPEC,
+                  AVAHI_PROTO_UNSPEC,
+                  SERVICE_TYPE_SINK,
+                  NULL,
+                  0,
+                  browse_callback,
+                  b))) {
+
+        if (error_string)
+            *error_string = avahi_strerror(avahi_client_errno(b->client));
+        goto fail;
+    }
+
+    if ((flags & PA_BROWSE_FOR_SOURCES) &&
+        !(b->source_browser = avahi_service_browser_new(
+                  b->client,
+                  AVAHI_IF_UNSPEC,
+                  AVAHI_PROTO_UNSPEC,
+                  SERVICE_TYPE_SOURCE,
+                  NULL,
+                  0,
+                  browse_callback,
+                  b))) {
+
+        if (error_string)
+            *error_string = avahi_strerror(avahi_client_errno(b->client));
+        goto fail;
+    }
+
+    return b;
+
+fail:
+    if (b)
+        browser_free(b);
+
+    return NULL;
+}
+
+static void browser_free(pa_browser *b) {
+    pa_assert(b);
+    pa_assert(b->mainloop);
+
+    if (b->sink_browser)
+        avahi_service_browser_free(b->sink_browser);
+    if (b->source_browser)
+        avahi_service_browser_free(b->source_browser);
+    if (b->server_browser)
+        avahi_service_browser_free(b->server_browser);
+
+    if (b->client)
+        avahi_client_free(b->client);
+
+    if (b->avahi_poll)
+        pa_avahi_poll_free(b->avahi_poll);
+
+    pa_xfree(b);
+}
+
+pa_browser *pa_browser_ref(pa_browser *b) {
+    pa_assert(b);
+    pa_assert(PA_REFCNT_VALUE(b) >= 1);
+
+    PA_REFCNT_INC(b);
+    return b;
+}
+
+void pa_browser_unref(pa_browser *b) {
+    pa_assert(b);
+    pa_assert(PA_REFCNT_VALUE(b) >= 1);
+
+    if (PA_REFCNT_DEC(b) <= 0)
+        browser_free(b);
+}
+
+void pa_browser_set_callback(pa_browser *b, pa_browse_cb_t cb, void *userdata) {
+    pa_assert(b);
+    pa_assert(PA_REFCNT_VALUE(b) >= 1);
+
+    b->callback = cb;
+    b->userdata = userdata;
+}
+
+void pa_browser_set_error_callback(pa_browser *b, pa_browser_error_cb_t cb, void *userdata) {
+    pa_assert(b);
+    pa_assert(PA_REFCNT_VALUE(b) >= 1);
+
+    b->error_callback = cb;
+    b->error_userdata = userdata;
+}